NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water
Edition: Model Aviation - 1982/05
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 115
NO OCR TEXT NO OCR TEXT Main landing gear attaches just behind step rubberbands Water rudder extends downward steering pond hinges up Bands fit around aiumlnum rods extending through tubes fuseiage horizontai position out way shore duty Engine pylon tank cradle theirgiory Pourmost engine mount Wing tip floats can beattached permanently made removable strip minimizes drag makes slick-looking installation Velcro top float allows easy interchanaina Tank rests cradle firmly attacnE place held wood screws Seamaster fiaw weli G-Mark 30 Twin instalisa power poa U Ucuery a,u ac aan. p1a vizam asfety precaution FRBT Nor Tm RES ii PIECES NttqfrAer4S - I/I6PLYW0OO FACE PLATE ON /2 X 21/2 HARDWOOD BLOCK EACH SIDE OF PYLON KB40 ENGINE Separate engine mount cowl shown au thor suggestS one-piece Fourmost Quickie Mount inte gral cowiing BALSA HOLLOWED IBERGLASS I/2X 3/8X ii 3/8ROOF PLY WODO PYLON WITH /2 SQ BALSA FAIRING I/B BALSA SHEET TOP AND BOTTOM BALSA STERN BLOCK WING TIP FLOAT 2 1/4 SHEET BALSA TOP AND SIDES W N BALSA BULKHEADS HOLLOJIED BALSA OR FIBERGLASS BASE WiTH 1/8 SQ GLEES STA8ILIZER BUILT UP FROM3/8 TRIANGLE1/4 BALSA SHEET 1/4 BALSA FRAMING OR USEFAIRING AND BRACEFIN AND RUDDER HEADMASTER SPORT 40 SOLID SHEET RUDDER AND ELEVATORS ISIG2AILERON STOCK /1/16 PLY\tD DOUBLER WATER RUDDER 7 7 1/B X6X 48 SHEET BALSA SIDES 7 i/4DOWEL THROUGH AS WiNG HOLD DOWN I/B PLYWOOD SPAR STIFFENER AT C/SECTiON TWO RIB BAYS OUT FROM ROOT HC SUGGESTION 3/4 SQ BALSA REAR SPAR I/2X 3/8 TOPAMO BOTTOM SPARS 1/2 X 11/4 BALSA AILERON STOCK 3/8 BALSA TIP FORM 1/4 X 3/8 CORIiERS. K FORMICATOR PLASTIC NOSE OR HOLLOWED BLOCK /4 PLYWOOD WITH 3/8 TRIANGLE N BASE ID FLD 1/8 BALSA SHEET DOUBLED WITH CROSSED GRAIN FOR ALL BULKHEADS 3/4WIEaON 3f32 WIRE 3/81TRLANGJLAR STOCK /4 BALSA WING CRADLE i/4DIAALUMINUM TUBE REMWABLE IN 5/16 FIBERGLASS TUELA$ / LG MOUNT W/RUUEN / 1/16 SHEET BALSA // 3/32 PLYVOD BO1TOMLE COVER TOP FROM S16 FORWARDAND BOTTOM 2 UWHEEL ON MWIRE SOLDEFD TO MELSTRiP 3/ 32 BALSA SI-IEET RIBS P FLOAT SEE ABcNE I/16X 5/16 CAP STRIPS 3/4 X 3/BBALSA LEADING EDGE use wing Headmaster modifying meant engine pylon flying boat integral hull mounted wing Thats way pylon mounted Works great name natural result dood ling Since design basically sort Head master Sport Forty went sea what else thing Some modelers have access lakes ponds others dont try make design amphibiousa model can operated either off water runway depend ing what available So quickly removable tricycle landing gear incorporated cover bases Seamaster Sport 40 designed enthusiasts 40 60 engines want model can flown off water land easy build easy fly Incidentally during test program model also flown Mark twin 30 Admittedly scale per formance flown wing brute power did very well have 30 35 dont want outside loops Seamaster Sport 40 will give very scale-like flights Youve got 30 35 want long scale-like takeoffs water Seamaster Youve got 60 want zip off water climb out near vertical outside loops Seamaster Take choice So lets build study plans first Wing happen have Headmaster Sport Forty wing already built Use have build scratch plans show very conventional structuresomewhat different kit wing since preshaped leading edge trailing edge may available Also youve built sport trainers like Goldberg Falcon Sig Kommander RCM 60 Seamaster wing will present no problems decide use 60 engine worried about strength center section its never problem can cover 3A-oz glass cloth before MonoKoting painting weight addition will minor Its choice Since structure conventional needs said build plan ever note plans show servo installation will yield differential aileron travel recom mend use setup mandatory have equal aileron travel possibility will have adverse yaw applying aileron unless also feed bit rudder Again its choice Wing tip floats wing tip floats simple box structuretwo sides nose block tail block top bottom sheeting attach floats wing three alternatives way permanently Hot Stuff floats under surface wing Another insert 3/16-in dowels nose block tail block hold floats rubberbands going over top wing third wayand works quite wellis make sure upper curve float fits flush under curve wing Hot Stuff side Velcro strip wing other side top float Press float up place attached want fly Seamaster landplane version dont want scrape tip floats during rough landing runway can quickly remove tip floats land flying Tail surfaces stabilizer fin made -in balsa rudder elevator can also made -in balsa stock sim plifi job tapering down 1/16-in trailing edge used Sigs 2-in aileron stock elevator rudder piece Sigs 2-in aileron stock butt-joined piece -in flat balsa cut triangular shape shown plans works well Since leading edge Sigs aileron stock rounded have slice off straight buttglue forward section rudder As elevator will notice plans aileron stock sliced angle leading edge MonoKote hinges can used prefer use center line hinges aileron stock can used Note 1/16 plywood doubler bottom rudder serves two purposes purpose provide firm base mounting control horn other likewise swing axis water rudder can re tracted flying Seamaster Sport Forty land-plane rudder hinges matter choice used MonoKote hinges prefer nylon hinges trailing edge stab leading edge rudder will have V-cut rounded permit rudder movement HulL Up point construction has easy say hull hard make will have careful assembling various parts sure alignment true As can see plans hull sides big want cut out piece youll need couple Sigs x 6 balsa sheets True cost two 3-in wide ENGINE MT Top VIEW ONT VIEW RALSA MOCK TRIANGLE STOCR CRACES TI 1-34 DC HARDWOOD ENGINE PYLON EC PC NYLON OR GLASS PHORFLE PROPCAR RAL GOONS OFF TOP CORNERSIA TO CURVES ORAPEP NOSE SLOEK IS HOLLOWED CRY TO ACCOMMOOATE LANONS SEAR IOU CAN RE FORMED PLASTIC SR IAv VRPLY DARD TOP34 ELITE NOSE SEAR1S3 FIT TI SOS 330 MUSIC3R TRIANGLE APREBRACE KEEP CORNERS I7SHAM OR ROTTOM EDYR ROSE WHEEL pieces butt-joined edge can get two pieces 6-in sheets same density equal weight will make job aligning hull shape longitudinally lot easier Note plans show bulkheads made two pieces -in balsa sheet having grain run vertical other grain horizontal makes very strong structure However want use -in balsa stock run single grain crosswise gives better compression strength pull forward aft ends hull inwards achieve desired plan-form sequence used assembling hull Cut out partssides bulkheads doublers Glue doublers sides Glue bulkheads 456 7 side Make sure perpendicular side Glue bulkheads other side now have two sides joined bulkheads 28 Model Aviation hull sides joined first equal width bulkheads pulled together nose former tail post hull bulkheads place Sheet sides 2-ply bulkheads make extremely strong structure FULL-SIZE PLANSAVAILABLE SEE PAGE 140 ING FAIANG1/4 ALLBB&*J TOES PB BALSA SAKESNA KFSSSIASE BAEW UPE Y- ~B /SERVOSIII -FUSELAGE 19P VIEW________ I/O BALSA IOCIWLER 1flj1/p 0 I~ Li1 [v32][b13154500500]] NGLE STOCIS 0 HEADMASTER SPORT 401 STABILIZ7if SIG 2 AILERON STOCK 04DOWEL WING HOLD SOWN liZ" 2-I/2 HARDWOODWINO OSNOCCOTEABERON ON pHETON MOSNTS EPOSIEDSTABILIZERELEVATOR TO DOES OF PSLON B AWI BALSA BLOCS 2 FAIRINS MONOIKOTE HI4GE TAJL GRAFT IWESS OH SOLLIVAN B OZ SSOAHE TANK EIHEDHAL 2 EACK WINO SAY ABE PANEL FLAS BASE OTHEHI -DIHEDRAL BRACESI/B PLYDIHEDRAL I/O BALSASKETCH FOR"" VA SODS TOP COP/ES TO TANG CRADLE Hp- SUBATLY CADGED SHAPE /2SOCOVER ASODNALY VG BOTTOMTAM 3/A TRINGALE BALSASTOCK TO FIT FAIRNS- I/B ALIGNING GALS1/B BALSA TOP SHELliNG CROSS GRAIN CD I/Hi/H BALSA DoRa VHDOWEL WATER HORDES SWINGS OF FCN LAND FLYING WING SEATING TAPE1/1K PLY NYLON TAILSOSALER010 COPPER VEBYOSFUSELAGESIDE VIEWvBBBLSASKID SOEDEHED ON I/B BALSAVK MOSIC WIRE CROSS IWIAN BOTTOM 5/IA FIHEROLASS TIS0I23A50 NOTEI/B BALSA SOD SYISETIOG [V___ "-"ALL I/O BALKHEAOR IFOCEPT S BNIIS NOT SHOWN FOR CLARITY ARE MADE BY LAMINASYNG TWO PISCES LiiiSF I/H BALSA SHEET WITH ORAIN 2-1/4 WHEELS SEAMASTER VERTICAL ON ORE ABS HORIZONTAL PYLONArB AL4OUIOIAI TTOM3/32 PLY BOTTOMON THE OTHER DESIGNED B DRAWN BY KEN WILLARD I/AALLBI TOBESLOADING SEAR SWEET IflEol TRACIIG BY JOE DEWIAIIIU sides parallel other longitudinal direction Carefully pull two sides inward making sure inward pull equal glue forward ends sides plywood * 1 bulkhead use Hot Stuff baking soda can hold sides alignment very brief time needed adhesive set have associate apply Hot Stuff joint Pull sides together tail post glue aft ends sides tail post critical step sides will have twist slightly slanted angle bulkhead #7 twist must uniform tail post perpen dicular bottom hulL blow step tail surfaces will properly aligned wing doubly sure same true inward pull sides tail post must center line ofthe plan-form hull Install remaining bulkheads will find have slightly force-fitted will provide curvature shown Dont shave down fit Press place check align ment apply glue joints Install triangular braces bulkheads # 1 4 5 assure maximum adhesion greatest strength points 15- 30-mm epoxy recommended joints ft perfectly can work fast super glue will job happen misalign braces dont get second chance Better take additional time have start over now ready attach bottom sheeting First block-sand bottom sides horizontal provide maximum gluing surface Pylon Make basic hardwood engine pylon per plan point have choice can build up entire pylon structure before installing pylon hull can install basic hardwood piece buildup rest later Carefully align placement hardwood pylon hull centered vertical Make some aligning marks pull pylon out smear bulkheads #4 5 epoxy pylon fits put pylon place Immediately install triangular bracing stock epoxy dry whole structure virtually one-piece mount must strong because takes vibra tion engine transmits hull Before installing top sheeting waterproof inside hull several coats dope also good idea run bead epoxy along joints between bottom sheeting sides Before putting top sheeting make necessary holes secondary structure required radio installation nose gear main gear fiberglass retaining rods Depending den sity balsa sheeting used making tail surfaces radio equipment may have located differently position shown Hull bottom sheeted cross-grain Install servos pushrods routed straight possible prevent binding May 198229 engine pylon viewed rear can build up entire pylon before attaching hull can glue piece add rest pylon structure later plans ballast may needed nose good idea point temporarily assemble model major weight factors engine radio batteries gear etc place see what variations will needed balance model point shown plans Make allowances additional weight aft section due covering hinges horns etc Install flexrods nose gear tail sur faces engine control engine control bit tricky cable has go through fairly sharp bend must anchored keep buckling Operate control use small bracing blocks wherever note tendency cable buckle Youll probably cuss couple times have better method use As said way did necessarily way has done Put top sheeting again first block-sand top sides hori zontal Add balsa fairing blocks alongside pylon Sand corners round shown detail forward wingonly top bottom corners must kept sharp good planing action water Make nose block dont want model amphibious block can solid Otherwise hollow out required accom modate nose gear prototype carved nose block formed plastic nose cone using Formicator made Idea Develop ment slides off easily can held place small wood screw hull now complete final step needed will slightly different cases hull due differences balsa density measure angular differ ence between stabilizer wing inci dence appear plan will find approximately four degrees However pull aft sections two sides hull together tail post twisting action will reduce angle four degrees too much something less much As said will depend wood way bends desired angular difference two degrees point check angle Put wing cradle tack-glue stab place have Robart incidence meter use dont draw line parallel top hull stali rests can use 36-in ruler forward under wing cradle draw line vertical tangent curve leading edge back center trailing edge two lines should form angle two degrees angle less degree trailing edge stab will have shimmed up angle two degrees leading edge stab will have shimmed up drawing plans have tried make sort ofmiddle ground angle sides bent will result angular difference one-half degrees approxi mately super-critical closer get one-half degrees better flight transition will go full power idle glide Note plans show stab resting top hull Fine angle turns outright shimming needed cover top hull under stab piece a sand needed either thinning down trailing edge reduce angle leading edge stab location increase likely correction will lower trailing edge slightly Landing gear optional feature will want install want flexibility easy set up can include just few minutes additional work nose gear standard Top Flite stallation can use nose gear Headmaster want model set bit lower did can make strut bit shorter dont have wire-bending gear can use adjustable struts axle sets can obtained hobby shop main gear can made landing gear blank bending center portion wide enough span width hull step plans show method installation makes possible install remove gear about minute Transverse 5/16 fiber glass tubes Sullivan epoxied right inside bottom hull come out side hole sealed -in aluminum tubing -in fiberglass rods can inserted through 5/16 tubes about ruding gear strapped place rubberbands Yes could put reinforcing piece hard wood transversely step flush bottom rear step bolt gear place sure epoxy firmly doesnt rip up bottom hard landing prefer rubberband attachment shown Its quicker easier also provides some shock-mounting effect Oh yesdont use -in wood dowels fit inside 5/16 tubes fit right after couple landings water swell up cant removed knowI rebuild bottom proto type after learning hard way aluminum 3/C I-S/B LEA4G EUSE ----if---5KV4BALGA WING TIP GUSSET 38 BALSA S*ET 2 BLLKHEAD Ill jill liii till Ii liii liii liii till till iLli 4 BULKHEAD 3 BULKHEAD WIIG FAWIING-,6AIGA /\- -/ till -flilt jtill iii [ifV /-liii I_____ 5 B4AJQIAD B HULL CR055 55TI0Cd tubes worked best protect rear step getting scraped landing runway Goldberg nylon tip skid can Hot Stuffed center bottom hull nose block has hollowed out allow nose gear operate have equip ment can form ABS plastic either event hinge hollowed block bottom can swing down allow access steering arm retaining bolt No block doesnt have sealed Very little water will get since outlet nose gear flexrod sealed no water will get inside hulL sure use balsa block waterproof hollowed out inside sufface dope Engine pylon tank cradle Earlier dis cussed installation basic hardwood uptight hull construction firewall hardwood backing 1/16 plywood face plate shaped accommodate 30 Model Aviation Tank cradle epoxiedto rearof engine pylon Balsa box coversthetank Its held place wood screws major components except wing lined up inspection Ken recommends cover tail surfaces before attaching FULL-SIZE PLANS AVAILABLE PAGE 140 III 4II4IItz IIIIIIiiIIII ~ IIL ii IIIIII LUSTING EDDEI II5iiIIIIiiIIII 11II*JlII4IIII IIii-4w2-H-4-iiII NGi~~1 IIIIII I/A BALSA IVRUALSAIIII WING TIP USISSET IISHEETTOPII PLANIFINWEETHERl1cArI-A BOTTOMIIIITOPNBOTTOM II II IS/A /16 CAP II iBEI~INAIFIFTEUi II~R1UM1EGROOI'I ii 100TTOM IIISERUORRILSIIS/32BALSA IIdTOREBVOTOUSE II IDFFEBR4TABI I IIII II II 3IIIISHEETRIBSII -4 III ASSV2 FI/H ALERON STOCK BALSA mjTUBE I/H BALSA SHEET / 7WING TIP FLOATS 7 WINO lip FLOATS ARE BOLT UP WITh VR BALSA SHEET AVS BALSA ALOEK PLOASBALSA AT FRONT HAlO REAR SANOSTAB LIZER- BALSA REAR PSUG TO SUSTOILYSHEET ROUNDED SHAPE N CENTERI/H SO B BULKHEADSECTIONV4 SQMEET II AD/f EAUS ARE MADE FROMi/N BALSA SHEETI 2 VR BALSA SHEET4 BALSA T GRAIN VERTICAL ONII PH PIT= ITAL UN THE OTHER BULKHEAD ELEVATOR UNRING TIP FLOAT NOSCALEECEVATON IS MADE FROM0.525ASA NSb F AILERON STOCK -I AFT OF SPAR f [----NiGHT CURVATURE DEAWIFOL -9 U___________SEAMASTER SPORT 40 AMPHIBIAN TYPICAL CROSS SECTIONNOTE PLOT SECTION OF AWFOIL 6 BULKHEAD TIP FLOAT 3/32 BALSA SHEET IN REOSION BOTTOM APT SF MARl SPARDESIONFO B DRAWN BY KEN WILLARD BALSA aoalWING RIBSFUN EASE SF CONSTROCTONSHEET 21SF DI Fourmost Products Quickie 500 engine mount shape can varied Suit other mounts prefer install 60 some modelers just love brute power tank cradle made piece a flat stock slotted forward end slides onto hardwood upright firmly attached using either super glue epoxy shell fits cradle houses tank made a stock sanded shaped streamline form Heres amusing sidelight first shell made a resulted rather boxy structure artistically-inclined wife Kathleen took look said Youre going put box top streamlined hull know rest Note housing tank held place two wood screws forward aftand tank placed top Vs sheet foam rubber minimuze fuel foaming vibration tank Actually practice also strapped housing place #64 rubberband around middle augment wood screws plans soldering small piece of0 10 sheet copper space betwen forward curve rear curve wire shown plans top wire curved around bolt inserted plywood doubler held place nut tightened tension needed hold place flying Seamaster landplane landing gear installed water rudder may retracted simply swinging up trail position behind air rudder Assembly plans show wing being held rubberbands happen like method However prefer couple -in dowels can Hot Stuffed leading edge wing pointing forward protruding about ning holes can cut #5 bulkhead retaining blocks can installed trailing edge location nylon bolts hold-down fixtures Either way attach somc 1/16-in wing seating tape wing cradles place wing position snug down tape will keep opening pretty well sealed against water entry tail assembly attached permanently matter choice whether cover surfaces first attach hull reverse went former route covering surfaces first attaching did require adding some overlapping strips Fabri Kote intersection angles fin hull stab Again choice yours Flying Seamaster Sport 40 primarily designed flying boat quickly remov able landing gear make amphibious want make first test flights off runway follow same procedures would other landplane like am really prefer water flying means make Radio installation plans show installa tion used prototype tray servos offset left allows room receiver batteries slid through opening right tray inserted under tray Ed White built second prototype put servos compartment aft step receiver location shown plans moved batteries forward compartment balance arrangement made bit easier run engine control through S-curve servo up carburetor arm choice yoursjust sure maintain CG location longitudinal range shown plans Water rudder water rudder made Iorming piece 1/16 wire shape shown May 198231 Seamaster Sport 40 makes impressive model land sea Landing gear can strapped removed minutes Can Afford Best. Slim Line exhaust systems precision machined top-grade bar stock aluminum casting Designed fit wide variety engines minimal air drag tangs provide positive constant positioning No plates clean no adaptors buy Just mount use Power loss minimum because exhaust gases expanded volume engine port LIMLJNE Jfj[[ Kawasaki Homers Smooth One. 222 CID Sale $17995 315 CID Sale $19499 Comes 6-bolt hub built-in choke Twin stack mount optional Like Quadra Optional Ovenstack soulfior Omnlco torsion anuilablo hook nrsinn ova Ia bin Dachin- ring pinnon inn hiatt nntnrnnnian & latin lilt OptonI thaho hoop hand Starting spocial nlnso-ooplod high-Iooanan npntfor I. PP rodiar. Salid-ho. app innaor wath op tionol radial oopporto acnE Pallor nhnan-hoOg nnlanirIy far modal aircraft Pawnr-balanrod light-waiglrn firehani 19 ROPER ENGINE CLOSE OUT SALE WHILE THEY LAST 37 SUPER POWER ROPER 22 OUADRA ENGINE 19 ENGINE RUB ft MOUNT PACK 75 IJSEO DEMO ENGINE BALENCED ft-BOLT HUB Roper Prtrer ft OGodro PROP DRILL 110 4 m Mufflers shown clockwise top/left Helicop ter Sport-Scale 1 Standard 60 Sport-Scale 11 Spring & Silicone-tubing Exhaust Extensions TunePipe Adaptor Standard 40 SEND FOR OUR FREE CATALOG TODAY PO BOX 3295 SCOTTSDALE AZ 85257 PHONE 602 967-5053 New H Sa Hornet Youll Love Partner An updated version popular engine Note improse ments made especially mini ature aircraft user roller thrust bearing double-ring piston spark plug location low 13 1/21 lb weioht power output LIMITED TIME OPFEP iisi $14995 SALE $8995 HORNER PART RETAILSALE 1/3 HPr Only 6 1/4 lbs So compact measures much larger Quadra Partner engine Comes complete built-in choke 6-bolt prop hub Radial mount twin stack available List $28995 INTRO $19995 RAQIAL MOUNT Roper 378 79703 RADIAL MOUBTPortow723 TWIN STACK EXHAUST 278 Kiorita705 basasoo$2995TWIN STACK EXHAUST Paitnrr Quadra120 7722499579900CHOKE ASSEMBLY Prttr N Occadra727 lOB729009999BRITE SPINNER Rpr Part ft Occd722 77955 00NEOPRENE GAS LINE Per FoeS707 itO2500RESISTORSPARKPLUGRCJ-ft773 BIG PROPS VAILABLE 7077495Firiulrdocrdftalasod Wood 702995 SALE 7295 7200 2495 7995 500 7595 7 95 2 50 Writ CALL first flights off water Its real thrill Make sure everything working properly water rudder extended downward Fire up engine adjust needle valve good setting full power idle Set Seamaster water engine idling will taxi slowly forward Check water rudder action make some turns cruise around slowly displacement mode Note wing will rock angle left wing float water over opposite angle After few turns line up Seamaster headed wind gradually increase power will pick up speed does hold full up elevator until lifts up displacement mode Comes up step Neutralize elevator let model gain speed wont take long Now nudge up elevator Seamaster will lift off water climb out have engine running full throttle climb angle will just about steep want have used usual grades wood available Seamaster Sport 40 will weigh around six pounds good 40 pylon will zip around like Pattern job Remember engine pylon full disc propeller providing effective thrust Landing water easy easier landing runway Usually room dont have quite precise approach Just line model up final let come gliding engine idle As model nears water ease bit up elevator level off let settle gently water During first flights may have make some minor adjustments control surfaces achieve line flight prefer Some modelers like have models fly slightly nose-down until pick up speed level off others prefer have models set climb slightly full speed fly level engine cut back cruising power Minor differences construction will require individual adjustments suit own personal desires Personal preferences also apply engine thrust line plans show thrust line straight aheadno downthrust side thrust some may prefer upthrust Upthrust Yes some flying boats have upthrust because high thrust line creating slight tendency make model nose down full power nose up idle effect will depend several interrelationshipsthe angular differ ence between stab wing incidence landing gear drag flying landing gear installed also what power havea 30 40 45 60 Another factor propeller However its effect likely create need side thrust rather vertical deviation two prototypes built date appears fly better slight amount right thrust other flies right No two airplanes exactly alike two pilots thing true Seamaster flies quite well straight-ahead thrust notice tendency fly slightly out line small adjust ments thrust line can easily made using shims attaching bolts engine mount face plate engine pylon Finally let say Seamaster Sport 40 rather imposing look sport fliers can fly Falcon 56 Bridi 40 trainer Sig Kommander Head master Sport Forty fully capable flying Seamaster Sport 40 either off water off runway Yes full power fast Continued page 115 32 Model Aviation 9 CID 6 MIg Arronnicon Pam Eqrit co love rnl hrhn apionor .tl otaflOv cord groona Poary-doty prop lab 24 w/ optional choke SALE $1 7995 Seed 20C Stamp CotalogiWill Ship Orders Same Day CODUPSAdd 54 shppo5 per errgre L HORNER SALES INC Rt2Box9300DixieHwy. 312946-2515 otter beaThfuI Plan Sets byatidreg Super Buccaneer 88 Wingspan 5 Engines Pias Set ecTFt $1795 3/4 size scale sersios ctassic designR/C Super Buccaneer 20 Custom Desron Seurce otters tee finest layout #RCFF-4 Plans make yoor own k Petonoabte $100 Pray Set $1295 erreos brochure Add $200 tar $ottea Fran C Marroo Tone affair East Olean airport closed full-scale traffic two-day affair both grass paved runways available George Privateer Fortune Drive Allegany NY 14706 can give details Yes complete address August 2 1-22 Hill Country Morgan Hill California years Hill Country Flyers Mammoth Scale Fly-in week two later usual promises same out standing event past Bob Morse director year can provide details Write Bob 3351 Pruneridge Ave Santa Clara CA 95051 September 4-6 Merwin Ranch Sacramento California doubt finest flying site have ever seen Grass-covered billiard-table flat dimensions measured feet yards miles Write Bob Rhoads 9100 La Serena Drive Fair Oaks CA 95628 details Keep touch Ill back next month Bob Beckman 8248 Holly Grove Ct Manas sas VA 22110 Seamaster Willard Continued page 32 maneuverable throttled back cruising power easy fly sport trainers market todayand easier some No primary trainer beginners sport flier sport trainer have previously built flown simple primary trainer want step up notch Theres old sayingTry youll like doesnt really apply Seamaster Sport 40 What does Build fly Youll love itt Buy DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY 1680* NEW*ATYOURFINGERTIPS*#*~e** ** SHOWED PRtCE SURVEY* ALLOY PARTS * NEVER OFFERED BEFORE**NO ORGANIZER AT OVER FtFTY* * NO MORE SPECtAL TRtPS TO THE**OOLLARS THAN TWtCEOUR* * HOBBY STORE tFtTtS OPENS** 495* RSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LIST PC5 256 3 t6 SOCKET HEAD CAP SCREW 25 2-56 1 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-40 1 4 SOCKET HEAD CAP SCREW 20 440 1 2 SOCKET HEAD CAP SCREW 20 468 34 SOCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 1 4 SOCKET HEAD CAP SCREW 15 632 1 2 SOCKET HEAD CAP SCREW iS 632 34 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW iS $-35 1 r SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 FLAT WASHERS SAF ZtNC PLATED 4 6 NYLON NSERT LOCK NUTS ZINC PLATED 2-56 440 632 TS 40 So 75 65 NI TOTAL PCS 735 KITSCOME COMPLETE WITH 10 COMPARTMENT HEAVY DUTY NDUSTRIAL ORGANtZER ONLY $2495 __________________THESE SUPERB NEW G-MARK THROTTLE-EQUI MULTI-CYLINDER R/C ENGINES OFFER SCALE APPEARANCE & PERFORM ARE EASY STARTING WITH SMOOTH OPERATION & EXCELLENT TOP 122 R/C30 RIO TWIN TWIN iu305 SCYL 2800-14000RPM2s R/C $9995 z0015000 RPM 1095 OZ $17495 THROTTLE MUFFLER AND BALL BEARINGS STD ALL ENGINES OZ 495 OZ GLOW PLUGS NOT INCLUDED 2500-15000 RPM Calif add Sales Tax Shipping $300 noCODs VISA t Brochure 61 US $170 Foreign Add 41/2% Visa er Card Std Dealer Distributor Discounts L 13400-26 Saticoy StreetNortH Hollywood Calif 9160512131 _______ May1982 115 t1tI Lah1 1 In/lI Ill - 5o5soJ~jIjj alhlAljijil -. iJ HSA4NI ALLOY ASSORTMENT SHOWN Mail Order To* Please include $250 tar postage HARDWARE SYSTEMS * handling Add $150 tar coo 1428 WashIngton Ave S@* Minn residents add 5% sales tax Eden Prairie NIKfl * Orders will shipped withing 48 Phone 81294I15T hours 1 CANNONR/C MULTI ENGINES RIC SYSTEMS cap Is allow access tor remov ing steerable nose gear Steering pushrod sealed against water