EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. 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CENTERLINE ON ENFER OEIRNRSDCUTTRERIBSTOAETRUTSAIHTTFIGOTGCFOBBINOI IIICIRCLE ENLARETINTO7FGATV STALL LBUNDER FUTRERVAIA CURER UUITRASGVARRR0 SOME WIDTH ARTEE IllS WINO PATTERN/JO FLARE P100TH CR000100 WITHOUT MATTING TEE RIGHT WINO NEGATIVE INCREASE FLARE BY LEFETEROOTWINO ELIDEOLICE RIBS OSLOREP LIGHTLY SANDING TEE BOTTOM OP THE LEFT FRDNT SPAR EITHER AT THE ROOT DROVER ORE R*SOJ-NRT ENTIRE LENOTFI OF TRE SPAR THE SHINEo SHOWN ELAROS PERFECTLY WITROUT HANDIN 000 OOZE WIDE FTPADDLEFOR 5150 TORGUE TRIRMING OF UUEIORT SAME ASGO5PRLB ACOTuAICTDROATICTC E BALSA-TOO WET WINO HOD 00575 BOOM 105 DEEP GTE VOID0 2a LONOSTRIEPEDIFTNCEVOREAFIREL FRAPOHAFT LONOTH IS PROP DIAMETER LESS H IN OPAWIDO FOAM MICRD-E IGTOOREDSAEBOEN LEFT RIDEUj-7LBORLNA-O6O-ISOOAR DOMBIlO050 DIN SAND SIOOSTA SIZE WLAROEFISO SANDINA BLOaT 1 PIERCE NOEFO OIlER SOAROEOCO jOSO SADID WIRE TAT TA ART GRAIN EITHER Oootnr-TTICRA-LUTOAERS$EAFIRE EIEMIRE AOOIR 0GB STRAIOATFHOOEERA FIN BRACESINSTALL BOOR IO TO SHAFT IS 000iiRIGRONIDE ASE TITEBONDHARLAN REARING-ADJUST TRACK ARD POT COMPLETED HONE/GRAFT ASAT IN RARO BALSARROINA TO MISS INRIOLLBALANCESTONEHOORED FITS OVERSIZE TRIM AND ROOTLOEL5TORCEMENT RLAN SMOOTH BEFORE OFSAAPC NOOKECARING ROD PROP JIG IA RANOR SANDERS POP PROF BLADE WARD ALTERNATE BLADEG BLADE PROCEDURESANDING ALDERS POR BALSA- ___________I MAKEUP BLANK W/OUGRAIN TollWANING PROP SOAHOT EEOC DOT BLHDE MAINTAIN 3ISjRRWWDWINO P00TH CORER MARE TOJOASE 000*600 WOOER ERT150-25069 WITH ODOR 180 GRIT DRAW CENTERLINE ROUND ALL RONDO TO H WARN SPAREBLADETIF POINTSSNNOPAOER WALL ON BAOOANDUP/7 PEERONT TERRIES ~0 FORTH BLADES ON SINCANPAPER PASTE STROLl R&IN5TALLBLAOE IN JIAJARI3LOCIHSIZBG SPARS TO SHAFT MOTOR STICKAND BEER IHOLD WETBLROETOEAN WITH ACEBANDADEDN BLADE ATATIMEDRY ITO BOPAR TIP AND BLADE TIPOVEN lOMb AT Z2OTE CEMENT EDGES WITA INDOOR CORERS STO OjLBCSHEOTLOCATOR OPETUINGOSAME IITWIST ONALL BATH BLADES FRONTCARDBOARD TEMOLATE FOR IA 0-ZAP AND CHES TEE SAME IHEI*SHEETIRDZ8P PROPH ALIGN SO LINES WITH SEAMS OR BLANK CUT GUT BLADE MARIOI IBSINSTUHEPIPE OR CAN SPAR TIP AND BLADETIF LOCATIONS ON MASHING TAPE LOCATORS REVERSE OF BLADE OJITH ARID POROUS PEN BALSA ERR SENOINE STAB AMA IN DOT LI NON RARE AT ROOFF FOR 10 ERRLEAUINA EANEWEIGHTS15d- ED715 oFBE-MARTSED6STABDATLINE O200OSZDEEP Sj-6LOPWING AND POSTO0l3l 00 DIES ENTER P010TH/STAR RIBS AINEASO OiLS CFUSE AND TAIL 01800182 jEREET BALSAIIPROPIIDEHP 0082 ODES ERFMOTORPIRELLI 008-032 OURA SAOALSAA5PLYING WEIGET- 0078 oz GOAT SNODA CAROBOHEDTIOTUR SILOITOFOSO 15400000 ASIDETEMPLATEATURNS -222SS5 DEE-HO NOTETHAT TAD AIRFOIL IS REVERSED IDIAMETER STUPLO DL8DEAOAINSTW. I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. FDWEH CIRCLE SLOAN WElUE PAPER WHEN AWOLIND ROBBER MOTOR IS ATTACHED TOTITE HTCBTOE MOTOR GrILlE O1.L TAOIST AND BENDT,E EVE WILL TOES TARE ON ZB-MrOFFURO*FERRROONnOG TWIST/SHEVO TWIST STIClT DElVE TAIL DENSE 7T RIOOTIj ORCWTOFOFSO*R OAROkRSOOTROLRA@-FRONT VIEWS- OUTLINE TOFOFSF*R AlTO CtA*I I/f BUILD REARS BORE MBALSA OR 0000008L1A WING HUILL DEVELOP TRIAl rOT OF BOORTRERMOUNTS WILL DEPEND ONOSE RTREO.OTR EFTOEXROTOR NOOK RELATIVE TOTER 000300 SOURS RXRCTLTTRE SANEROTOR WHILE 00CR IS SOIL. IIADDITIONALLY WREN .EUNCMED AT AION TOR THT joFLARE DUO TOTME CIREVEN AEITVDYSAMC LOADING ON TRELEFT WINE SPARS RB0000L FROM 10 BTJARNBMSLYOLNN MOORS AlTO PATTERNTERRETOE AMOUNT DEPENDS ON TEE RELATIVE STEENETE AND TAPER OF TOE LEOT FRONT SPAR RARE EXACT COOTROUF SPAN WIOOBC BANANA PEN 000000 ORSTEOLINS. ORONFOTOITE 5000050 OOEOBOLIS FROSUOITAROSIORE-GLUE EMESEFRIBSTOCO OMONATIOOU O&WINGTURISTONEWAND FLARE PROAIDES TOE ADDITIONA. LEFT WINO OSECOAT DEPORT SLIAINORIBS REOLIIRED TV OFETUOT TRE RIGRERTOROLIES INSOFFICIENT LEFEWINO LIFT ROSLILTS IN CRAOBINO/5TRLLINO U AlGA CEILING FLYING PROCEDURE AEJOST FOR SO-5IDFC LEVEL CIRCLE EDIIVO WINO IIUCIDENUE APOWER FLIORT INCREASE POWER UNTILEHAEEING/STALLING DEVELOPOELIMINATE AlDTAIL TILT ND LEFT RUDDER DO SOT CHANGE THESE SETTINGS WREN ADJUSTING FOR CRHDOIN/S7ALLIN5 BY GRADUALLY WEASENING TOE WATER STICIC TORSIONALLY AT AlTO IC___ IA TEEWING TWIST/SREW CAEEPULLT SAND lAO MOTOR STICO OR GROWS IJINCREASE FULL POWER OBELOW ONTIL TAD EZO CLITORS IN STEEP WIDE FULL-POWER CIRCLE IC1 r IIKXYXICXXXUCX II 1 ________ ____ ___ 1101 IUTOETOANUNTRHGRTSASS EElSLEASE THISAND SECTION TOSECTIDIR STRORASAIIDTHINIVE HO ELLIPTICAL TANGOLAR TO MINIMIZE E TO GET IWINOC' ' TAIL soN. lANA FORT LOCATIONBETRAFIOIIOS STALLIN TOINEREASE LUVIOIU IGHTS ..yI.. CENTERLINE ON ENFER OEIRNRSDCUTTRERIBSTOAETRUTSAIHTTFIGOTGCFOBBINOI IIICIRCLE ENLARETINTO7FGATV STALL LBUNDER FUTRERVAIA CURER UUITRASGVARRR0 SOME WIDTH ARTEE IllS WINO PATTERN/JO FLARE P100TH CR000100 WITHOUT MATTING TEE RIGHT WINO NEGATIVE INCREASE FLARE BY LEFETEROOTWINO ELIDEOLICE RIBS OSLOREP LIGHTLY SANDING TEE BOTTOM OP THE LEFT FRDNT SPAR EITHER AT THE ROOT DROVER ORE R*SOJ-NRT ENTIRE LENOTFI OF TRE SPAR THE SHINEo SHOWN ELAROS PERFECTLY WITROUT HANDIN 000 OOZE WIDE FTPADDLEFOR 5150 TORGUE TRIRMING OF UUEIORT SAME ASGO5PRLB ACOTuAICTDROATICTC E BALSA-TOO WET WINO HOD 00575 BOOM 105 DEEP GTE VOID0 2a LONOSTRIEPEDIFTNCEVOREAFIREL FRAPOHAFT LONOTH IS PROP DIAMETER LESS H IN OPAWIDO FOAM MICRD-E IGTOOREDSAEBOEN LEFT RIDEUj-7LBORLNA-O6O-ISOOAR DOMBIlO050 DIN SAND SIOOSTA SIZE WLAROEFISO SANDINA BLOaT 1 PIERCE NOEFO OIlER SOAROEOCO jOSO SADID WIRE TAT TA ART GRAIN EITHER Oootnr-TTICRA-LUTOAERS$EAFIRE EIEMIRE AOOIR 0GB STRAIOATFHOOEERA FIN BRACESINSTALL BOOR IO TO SHAFT IS 000iiRIGRONIDE ASE TITEBONDHARLAN REARING-ADJUST TRACK ARD POT COMPLETED HONE/GRAFT ASAT IN RARO BALSARROINA TO MISS INRIOLLBALANCESTONEHOORED FITS OVERSIZE TRIM AND ROOTLOEL5TORCEMENT RLAN SMOOTH BEFORE OFSAAPC NOOKECARING ROD PROP JIG IA RANOR SANDERS POP PROF BLADE WARD ALTERNATE BLADEG BLADE PROCEDURESANDING ALDERS POR BALSA- ___________I MAKEUP BLANK W/OUGRAIN TollWANING PROP SOAHOT EEOC DOT BLHDE MAINTAIN 3ISjRRWWDWINO P00TH CORER MARE TOJOASE 000*600 WOOER ERT150-25069 WITH ODOR 180 GRIT DRAW CENTERLINE ROUND ALL RONDO TO H WARN SPAREBLADETIF POINTSSNNOPAOER WALL ON BAOOANDUP/7 PEERONT TERRIES ~0 FORTH BLADES ON SINCANPAPER PASTE STROLl R&IN5TALLBLAOE IN JIAJARI3LOCIHSIZBG SPARS TO SHAFT MOTOR STICKAND BEER IHOLD WETBLROETOEAN WITH ACEBANDADEDN BLADE ATATIMEDRY ITO BOPAR TIP AND BLADE TIPOVEN lOMb AT Z2OTE CEMENT EDGES WITA INDOOR CORERS STO OjLBCSHEOTLOCATOR OPETUINGOSAME IITWIST ONALL BATH BLADES FRONTCARDBOARD TEMOLATE FOR IA 0-ZAP AND CHES TEE SAME IHEI*SHEETIRDZ8P PROPH ALIGN SO LINES WITH SEAMS OR BLANK CUT GUT BLADE MARIOI IBSINSTUHEPIPE OR CAN SPAR TIP AND BLADETIF LOCATIONS ON MASHING TAPE LOCATORS REVERSE OF BLADE OJITH ARID POROUS PEN BALSA ERR SENOINE STAB AMA IN DOT LI NON RARE AT ROOFF FOR 10 ERRLEAUINA EANEWEIGHTS15d- ED715 oFBE-MARTSED6STABDATLINE O200OSZDEEP Sj-6LOPWING AND POSTO0l3l 00 DIES ENTER P010TH/STAR RIBS AINEASO OiLS CFUSE AND TAIL 01800182 jEREET BALSAIIPROPIIDEHP 0082 ODES ERFMOTORPIRELLI 008-032 OURA SAOALSAA5PLYING WEIGET- 0078 oz GOAT SNODA CAROBOHEDTIOTUR SILOITOFOSO 15400000 ASIDETEMPLATEATURNS -222SS5 DEE-HO NOTETHAT TAD AIRFOIL IS REVERSED IDIAMETER STUPLO DL8DEAOAINSTW. I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. 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I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 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I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 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LEFT WINO OSECOAT DEPORT SLIAINORIBS REOLIIRED TV OFETUOT TRE RIGRERTOROLIES INSOFFICIENT LEFEWINO LIFT ROSLILTS IN CRAOBINO/5TRLLINO U AlGA CEILING FLYING PROCEDURE AEJOST FOR SO-5IDFC LEVEL CIRCLE EDIIVO WINO IIUCIDENUE APOWER FLIORT INCREASE POWER UNTILEHAEEING/STALLING DEVELOPOELIMINATE AlDTAIL TILT ND LEFT RUDDER DO SOT CHANGE THESE SETTINGS WREN ADJUSTING FOR CRHDOIN/S7ALLIN5 BY GRADUALLY WEASENING TOE WATER STICIC TORSIONALLY AT AlTO IC___ IA TEEWING TWIST/SREW CAEEPULLT SAND lAO MOTOR STICO OR GROWS IJINCREASE FULL POWER OBELOW ONTIL TAD EZO CLITORS IN STEEP WIDE FULL-POWER CIRCLE IC1 r IIKXYXICXXXUCX II 1 ________ ____ ___ 1101 IUTOETOANUNTRHGRTSASS EElSLEASE THISAND SECTION TOSECTIDIR STRORASAIIDTHINIVE HO ELLIPTICAL TANGOLAR TO MINIMIZE E TO GET IWINOC' ' TAIL soN. lANA FORT LOCATIONBETRAFIOIIOS STALLIN TOINEREASE LUVIOIU IGHTS ..yI.. CENTERLINE ON ENFER OEIRNRSDCUTTRERIBSTOAETRUTSAIHTTFIGOTGCFOBBINOI IIICIRCLE ENLARETINTO7FGATV STALL LBUNDER FUTRERVAIA CURER UUITRASGVARRR0 SOME WIDTH ARTEE IllS WINO PATTERN/JO FLARE P100TH CR000100 WITHOUT MATTING TEE RIGHT WINO NEGATIVE INCREASE FLARE BY LEFETEROOTWINO ELIDEOLICE RIBS OSLOREP LIGHTLY SANDING TEE BOTTOM OP THE LEFT FRDNT SPAR EITHER AT THE ROOT DROVER ORE R*SOJ-NRT ENTIRE LENOTFI OF TRE SPAR THE SHINEo SHOWN ELAROS PERFECTLY WITROUT HANDIN 000 OOZE WIDE FTPADDLEFOR 5150 TORGUE TRIRMING OF UUEIORT SAME ASGO5PRLB ACOTuAICTDROATICTC E BALSA-TOO WET WINO HOD 00575 BOOM 105 DEEP GTE VOID0 2a LONOSTRIEPEDIFTNCEVOREAFIREL FRAPOHAFT LONOTH IS PROP DIAMETER LESS H IN OPAWIDO FOAM MICRD-E IGTOOREDSAEBOEN LEFT RIDEUj-7LBORLNA-O6O-ISOOAR DOMBIlO050 DIN SAND SIOOSTA SIZE WLAROEFISO SANDINA BLOaT 1 PIERCE NOEFO OIlER SOAROEOCO jOSO SADID WIRE TAT TA ART GRAIN EITHER Oootnr-TTICRA-LUTOAERS$EAFIRE EIEMIRE AOOIR 0GB STRAIOATFHOOEERA FIN BRACESINSTALL BOOR IO TO SHAFT IS 000iiRIGRONIDE ASE TITEBONDHARLAN REARING-ADJUST TRACK ARD POT COMPLETED HONE/GRAFT ASAT IN RARO BALSARROINA TO MISS INRIOLLBALANCESTONEHOORED FITS OVERSIZE TRIM AND ROOTLOEL5TORCEMENT RLAN SMOOTH BEFORE OFSAAPC NOOKECARING ROD PROP JIG IA RANOR SANDERS POP PROF BLADE WARD ALTERNATE BLADEG BLADE PROCEDURESANDING ALDERS POR BALSA- ___________I MAKEUP BLANK W/OUGRAIN TollWANING PROP SOAHOT EEOC DOT BLHDE MAINTAIN 3ISjRRWWDWINO P00TH CORER MARE TOJOASE 000*600 WOOER ERT150-25069 WITH ODOR 180 GRIT DRAW CENTERLINE ROUND ALL RONDO TO H WARN SPAREBLADETIF POINTSSNNOPAOER WALL ON BAOOANDUP/7 PEERONT TERRIES ~0 FORTH BLADES ON SINCANPAPER PASTE STROLl R&IN5TALLBLAOE IN JIAJARI3LOCIHSIZBG SPARS TO SHAFT MOTOR STICKAND BEER IHOLD WETBLROETOEAN WITH ACEBANDADEDN BLADE ATATIMEDRY ITO BOPAR TIP AND BLADE TIPOVEN lOMb AT Z2OTE CEMENT EDGES WITA INDOOR CORERS STO OjLBCSHEOTLOCATOR OPETUINGOSAME IITWIST ONALL BATH BLADES FRONTCARDBOARD TEMOLATE FOR IA 0-ZAP AND CHES TEE SAME IHEI*SHEETIRDZ8P PROPH ALIGN SO LINES WITH SEAMS OR BLANK CUT GUT BLADE MARIOI IBSINSTUHEPIPE OR CAN SPAR TIP AND BLADETIF LOCATIONS ON MASHING TAPE LOCATORS REVERSE OF BLADE OJITH ARID POROUS PEN BALSA ERR SENOINE STAB AMA IN DOT LI NON RARE AT ROOFF FOR 10 ERRLEAUINA EANEWEIGHTS15d- ED715 oFBE-MARTSED6STABDATLINE O200OSZDEEP Sj-6LOPWING AND POSTO0l3l 00 DIES ENTER P010TH/STAR RIBS AINEASO OiLS CFUSE AND TAIL 01800182 jEREET BALSAIIPROPIIDEHP 0082 ODES ERFMOTORPIRELLI 008-032 OURA SAOALSAA5PLYING WEIGET- 0078 oz GOAT SNODA CAROBOHEDTIOTUR SILOITOFOSO 15400000 ASIDETEMPLATEATURNS -222SS5 DEE-HO NOTETHAT TAD AIRFOIL IS REVERSED IDIAMETER STUPLO DL8DEAOAINSTW. I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. FDWEH CIRCLE SLOAN WElUE PAPER WHEN AWOLIND ROBBER MOTOR IS ATTACHED TOTITE HTCBTOE MOTOR GrILlE O1.L TAOIST AND BENDT,E EVE WILL TOES TARE ON ZB-MrOFFURO*FERRROONnOG TWIST/SHEVO TWIST STIClT DElVE TAIL DENSE 7T RIOOTIj ORCWTOFOFSO*R OAROkRSOOTROLRA@-FRONT VIEWS- OUTLINE TOFOFSF*R AlTO CtA*I I/f BUILD REARS BORE MBALSA OR 0000008L1A WING HUILL DEVELOP TRIAl rOT OF BOORTRERMOUNTS WILL DEPEND ONOSE RTREO.OTR EFTOEXROTOR NOOK RELATIVE TOTER 000300 SOURS RXRCTLTTRE SANEROTOR WHILE 00CR IS SOIL. IIADDITIONALLY WREN .EUNCMED AT AION TOR THT joFLARE DUO TOTME CIREVEN AEITVDYSAMC LOADING ON TRELEFT WINE SPARS RB0000L FROM 10 BTJARNBMSLYOLNN MOORS AlTO PATTERNTERRETOE AMOUNT DEPENDS ON TEE RELATIVE STEENETE AND TAPER OF TOE LEOT FRONT SPAR RARE EXACT COOTROUF SPAN WIOOBC BANANA PEN 000000 ORSTEOLINS. ORONFOTOITE 5000050 OOEOBOLIS FROSUOITAROSIORE-GLUE EMESEFRIBSTOCO OMONATIOOU O&WINGTURISTONEWAND FLARE PROAIDES TOE ADDITIONA. 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CENTERLINE ON ENFER OEIRNRSDCUTTRERIBSTOAETRUTSAIHTTFIGOTGCFOBBINOI IIICIRCLE ENLARETINTO7FGATV STALL LBUNDER FUTRERVAIA CURER UUITRASGVARRR0 SOME WIDTH ARTEE IllS WINO PATTERN/JO FLARE P100TH CR000100 WITHOUT MATTING TEE RIGHT WINO NEGATIVE INCREASE FLARE BY LEFETEROOTWINO ELIDEOLICE RIBS OSLOREP LIGHTLY SANDING TEE BOTTOM OP THE LEFT FRDNT SPAR EITHER AT THE ROOT DROVER ORE R*SOJ-NRT ENTIRE LENOTFI OF TRE SPAR THE SHINEo SHOWN ELAROS PERFECTLY WITROUT HANDIN 000 OOZE WIDE FTPADDLEFOR 5150 TORGUE TRIRMING OF UUEIORT SAME ASGO5PRLB ACOTuAICTDROATICTC E BALSA-TOO WET WINO HOD 00575 BOOM 105 DEEP GTE VOID0 2a LONOSTRIEPEDIFTNCEVOREAFIREL FRAPOHAFT LONOTH IS PROP DIAMETER LESS H IN OPAWIDO FOAM MICRD-E IGTOOREDSAEBOEN LEFT RIDEUj-7LBORLNA-O6O-ISOOAR DOMBIlO050 DIN SAND SIOOSTA SIZE WLAROEFISO SANDINA BLOaT 1 PIERCE NOEFO OIlER SOAROEOCO jOSO SADID WIRE TAT TA ART GRAIN EITHER Oootnr-TTICRA-LUTOAERS$EAFIRE EIEMIRE AOOIR 0GB STRAIOATFHOOEERA FIN BRACESINSTALL BOOR IO TO SHAFT IS 000iiRIGRONIDE ASE TITEBONDHARLAN REARING-ADJUST TRACK ARD POT COMPLETED HONE/GRAFT ASAT IN RARO BALSARROINA TO MISS INRIOLLBALANCESTONEHOORED FITS OVERSIZE TRIM AND ROOTLOEL5TORCEMENT RLAN SMOOTH BEFORE OFSAAPC NOOKECARING ROD PROP JIG IA RANOR SANDERS POP PROF BLADE WARD ALTERNATE BLADEG BLADE PROCEDURESANDING ALDERS POR BALSA- ___________I MAKEUP BLANK W/OUGRAIN TollWANING PROP SOAHOT EEOC DOT BLHDE MAINTAIN 3ISjRRWWDWINO P00TH CORER MARE TOJOASE 000*600 WOOER ERT150-25069 WITH ODOR 180 GRIT DRAW CENTERLINE ROUND ALL RONDO TO H WARN SPAREBLADETIF POINTSSNNOPAOER WALL ON BAOOANDUP/7 PEERONT TERRIES ~0 FORTH BLADES ON SINCANPAPER PASTE STROLl R&IN5TALLBLAOE IN JIAJARI3LOCIHSIZBG SPARS TO SHAFT MOTOR STICKAND BEER IHOLD WETBLROETOEAN WITH ACEBANDADEDN BLADE ATATIMEDRY ITO BOPAR TIP AND BLADE TIPOVEN lOMb AT Z2OTE CEMENT EDGES WITA INDOOR CORERS STO OjLBCSHEOTLOCATOR OPETUINGOSAME IITWIST ONALL BATH BLADES FRONTCARDBOARD TEMOLATE FOR IA 0-ZAP AND CHES TEE SAME IHEI*SHEETIRDZ8P PROPH ALIGN SO LINES WITH SEAMS OR BLANK CUT GUT BLADE MARIOI IBSINSTUHEPIPE OR CAN SPAR TIP AND BLADETIF LOCATIONS ON MASHING TAPE LOCATORS REVERSE OF BLADE OJITH ARID POROUS PEN BALSA ERR SENOINE STAB AMA IN DOT LI NON RARE AT ROOFF FOR 10 ERRLEAUINA EANEWEIGHTS15d- ED715 oFBE-MARTSED6STABDATLINE O200OSZDEEP Sj-6LOPWING AND POSTO0l3l 00 DIES ENTER P010TH/STAR RIBS AINEASO OiLS CFUSE AND TAIL 01800182 jEREET BALSAIIPROPIIDEHP 0082 ODES ERFMOTORPIRELLI 008-032 OURA SAOALSAA5PLYING WEIGET- 0078 oz GOAT SNODA CAROBOHEDTIOTUR SILOITOFOSO 15400000 ASIDETEMPLATEATURNS -222SS5 DEE-HO NOTETHAT TAD AIRFOIL IS REVERSED IDIAMETER STUPLO DL8DEAOAINSTW. I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. FDWEH CIRCLE SLOAN WElUE PAPER WHEN AWOLIND ROBBER MOTOR IS ATTACHED TOTITE HTCBTOE MOTOR GrILlE O1.L TAOIST AND BENDT,E EVE WILL TOES TARE ON ZB-MrOFFURO*FERRROONnOG TWIST/SHEVO TWIST STIClT DElVE TAIL DENSE 7T RIOOTIj ORCWTOFOFSO*R OAROkRSOOTROLRA@-FRONT VIEWS- OUTLINE TOFOFSF*R AlTO CtA*I I/f BUILD REARS BORE MBALSA OR 0000008L1A WING HUILL DEVELOP TRIAl rOT OF BOORTRERMOUNTS WILL DEPEND ONOSE RTREO.OTR EFTOEXROTOR NOOK RELATIVE TOTER 000300 SOURS RXRCTLTTRE SANEROTOR WHILE 00CR IS SOIL. IIADDITIONALLY WREN .EUNCMED AT AION TOR THT joFLARE DUO TOTME CIREVEN AEITVDYSAMC LOADING ON TRELEFT WINE SPARS RB0000L FROM 10 BTJARNBMSLYOLNN MOORS AlTO PATTERNTERRETOE AMOUNT DEPENDS ON TEE RELATIVE STEENETE AND TAPER OF TOE LEOT FRONT SPAR RARE EXACT COOTROUF SPAN WIOOBC BANANA PEN 000000 ORSTEOLINS. ORONFOTOITE 5000050 OOEOBOLIS FROSUOITAROSIORE-GLUE EMESEFRIBSTOCO OMONATIOOU O&WINGTURISTONEWAND FLARE PROAIDES TOE ADDITIONA. LEFT WINO OSECOAT DEPORT SLIAINORIBS REOLIIRED TV OFETUOT TRE RIGRERTOROLIES INSOFFICIENT LEFEWINO LIFT ROSLILTS IN CRAOBINO/5TRLLINO U AlGA CEILING FLYING PROCEDURE AEJOST FOR SO-5IDFC LEVEL CIRCLE EDIIVO WINO IIUCIDENUE APOWER FLIORT INCREASE POWER UNTILEHAEEING/STALLING DEVELOPOELIMINATE AlDTAIL TILT ND LEFT RUDDER DO SOT CHANGE THESE SETTINGS WREN ADJUSTING FOR CRHDOIN/S7ALLIN5 BY GRADUALLY WEASENING TOE WATER STICIC TORSIONALLY AT AlTO IC___ IA TEEWING TWIST/SREW CAEEPULLT SAND lAO MOTOR STICO OR GROWS IJINCREASE FULL POWER OBELOW ONTIL TAD EZO CLITORS IN STEEP WIDE FULL-POWER CIRCLE IC1 r IIKXYXICXXXUCX II 1 ________ ____ ___ 1101 IUTOETOANUNTRHGRTSASS EElSLEASE THISAND SECTION TOSECTIDIR STRORASAIIDTHINIVE HO ELLIPTICAL TANGOLAR TO MINIMIZE E TO GET IWINOC' ' TAIL soN. lANA FORT LOCATIONBETRAFIOIIOS STALLIN TOINEREASE LUVIOIU IGHTS ..yI.. CENTERLINE ON ENFER OEIRNRSDCUTTRERIBSTOAETRUTSAIHTTFIGOTGCFOBBINOI IIICIRCLE ENLARETINTO7FGATV STALL LBUNDER FUTRERVAIA CURER UUITRASGVARRR0 SOME WIDTH ARTEE IllS WINO PATTERN/JO FLARE P100TH CR000100 WITHOUT MATTING TEE RIGHT WINO NEGATIVE INCREASE FLARE BY LEFETEROOTWINO ELIDEOLICE RIBS OSLOREP LIGHTLY SANDING TEE BOTTOM OP THE LEFT FRDNT SPAR EITHER AT THE ROOT DROVER ORE R*SOJ-NRT ENTIRE LENOTFI OF TRE SPAR THE SHINEo SHOWN ELAROS PERFECTLY WITROUT HANDIN 000 OOZE WIDE FTPADDLEFOR 5150 TORGUE TRIRMING OF UUEIORT SAME ASGO5PRLB ACOTuAICTDROATICTC E BALSA-TOO WET WINO HOD 00575 BOOM 105 DEEP GTE VOID0 2a LONOSTRIEPEDIFTNCEVOREAFIREL FRAPOHAFT LONOTH IS PROP DIAMETER LESS H IN OPAWIDO FOAM MICRD-E IGTOOREDSAEBOEN LEFT RIDEUj-7LBORLNA-O6O-ISOOAR DOMBIlO050 DIN SAND SIOOSTA SIZE WLAROEFISO SANDINA BLOaT 1 PIERCE NOEFO OIlER SOAROEOCO jOSO SADID WIRE TAT TA ART GRAIN EITHER Oootnr-TTICRA-LUTOAERS$EAFIRE EIEMIRE AOOIR 0GB STRAIOATFHOOEERA FIN BRACESINSTALL BOOR IO TO SHAFT IS 000iiRIGRONIDE ASE TITEBONDHARLAN REARING-ADJUST TRACK ARD POT COMPLETED HONE/GRAFT ASAT IN RARO BALSARROINA TO MISS INRIOLLBALANCESTONEHOORED FITS OVERSIZE TRIM AND ROOTLOEL5TORCEMENT RLAN SMOOTH BEFORE OFSAAPC NOOKECARING ROD PROP JIG IA RANOR SANDERS POP PROF BLADE WARD ALTERNATE BLADEG BLADE PROCEDURESANDING ALDERS POR BALSA- ___________I MAKEUP BLANK W/OUGRAIN TollWANING PROP SOAHOT EEOC DOT BLHDE MAINTAIN 3ISjRRWWDWINO P00TH CORER MARE TOJOASE 000*600 WOOER ERT150-25069 WITH ODOR 180 GRIT DRAW CENTERLINE ROUND ALL RONDO TO H WARN SPAREBLADETIF POINTSSNNOPAOER WALL ON BAOOANDUP/7 PEERONT TERRIES ~0 FORTH BLADES ON SINCANPAPER PASTE STROLl R&IN5TALLBLAOE IN JIAJARI3LOCIHSIZBG SPARS TO SHAFT MOTOR STICKAND BEER IHOLD WETBLROETOEAN WITH ACEBANDADEDN BLADE ATATIMEDRY ITO BOPAR TIP AND BLADE TIPOVEN lOMb AT Z2OTE CEMENT EDGES WITA INDOOR CORERS STO OjLBCSHEOTLOCATOR OPETUINGOSAME IITWIST ONALL BATH BLADES FRONTCARDBOARD TEMOLATE FOR IA 0-ZAP AND CHES TEE SAME IHEI*SHEETIRDZ8P PROPH ALIGN SO LINES WITH SEAMS OR BLANK CUT GUT BLADE MARIOI IBSINSTUHEPIPE OR CAN SPAR TIP AND BLADETIF LOCATIONS ON MASHING TAPE LOCATORS REVERSE OF BLADE OJITH ARID POROUS PEN BALSA ERR SENOINE STAB AMA IN DOT LI NON RARE AT ROOFF FOR 10 ERRLEAUINA EANEWEIGHTS15d- ED715 oFBE-MARTSED6STABDATLINE O200OSZDEEP Sj-6LOPWING AND POSTO0l3l 00 DIES ENTER P010TH/STAR RIBS AINEASO OiLS CFUSE AND TAIL 01800182 jEREET BALSAIIPROPIIDEHP 0082 ODES ERFMOTORPIRELLI 008-032 OURA SAOALSAA5PLYING WEIGET- 0078 oz GOAT SNODA CAROBOHEDTIOTUR SILOITOFOSO 15400000 ASIDETEMPLATEATURNS -222SS5 DEE-HO NOTETHAT TAD AIRFOIL IS REVERSED IDIAMETER STUPLO DL8DEAOAINSTW. I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248
Edition: Model Aviation - 1988/01
Page Numbers: 67, 68, 69, 70, 159, 160, 161, 162
EASY B supposed beginners event Its lot fun too its fun until get stuck 10 12-mm level nothing seems help stuck two years se ries Easy B modifications resulted breakthrough model flew far yond grandest expectations first time out ship did 15 mm 42 sec 55-ft ceiling 1985 King Orange meet Tampa Santa Ana 10 weeks later broke AMA Cat IV Easy B record 2123 flight cool March weather home state Ohio Akron boosted record 2201 May following month won Easy B event US Indoor Champs Niagara Falls 1636 70-ft ceiling Akron again August raised record 2325 non-drift up-and-down flight seemed almost too easy true youve built Easy B two looking way move up Serendipity may design too Its pretty low-tech model record-breaker Its really light 038-042 oz made standard materials can eith er ordered current Indoor suppliers picked up hobby shop construc tion process pretty easy use simple jigs templates tools shown drawing aids permit relaxed con struction wing stabilizer propeller having handle delicate assemblies until virtually complete Construction building model keep mind good-flying Easy B must somewhat flexible should twist little under torque fully-wound motor Therefore wood should have little flexibility Soft punky wood breaks suddenly put under load should used Glue joints should secure same reason Loads must transfer through joints model fully wound use standard Indoor cement pre-glue joints before joining parts lightly joint finally glued first side January 1988 67 Top The completed model has booming full-power climb has hit ceilings over 180-ft high Its also cruiser flying large 30 40-ft circles Above balsa wing spar jig permits quick accurate assembly two main spars Right Once completed spars moved wing pattern jig Three ribs wing tip added pre-fitted ironed dry con denser paper tack-glued board before panel covered Left required tools magnifying glasses glue gun really help does Jim Jones balsa stripper Also helpful build ing trimming coarse- fine-grit sharpening stone Above completed panel raised other completed covered 1/ x 2As strips keep paper smooth covering other complete job glue whole joint application will usually fall apart Wing spars wing modified Stan Chilton Honey B wing built Chilton style starting spars front rear spars assembled simple jig shown drawing First main spar pieces stripped stacked sanded shown system builder maintains control uniformity size placement main spar units until safely assembled Check spar sheet thickness Most sheets taper some some taper quite lot tip spars sliced separately 028-in 5-lb balsa stripped 045 wide stacked sanded size Because wing tips will added later air both spar tips should trimmed jigeach exactly same spars should dry least overnight jig both complete should checked placing over other dihedral main spar joints within total /16 other spars usable other should adjusted spar dihedral /16 max should used wing leading edge will become significant advantage adjusting model flight later completed spars transferred wing pattern/jig dress box cardboard pattern cutout shown cen terline paper should cemented underside centerline drawn Tack pattern building board wing assembled covered pattern/jig main panel time spars held place %2 X /2 x /2-in balsa blocks pinned board Both pre-marked spar center points should carefully lined up jig centerline spars should aligned square along whole length pattern making adjustments pinned blocks required three ribs should ce mented place allowed dry ribs sliced 032 deep pre sized pre-glued 021 C-grain sheet use cardboard metal airfoil template shown drawing pre-sized wing tip should added air completed panel covered still held pattern/jig may need tack-glue wing board before removing pins blocks condenser paper panel about 4 chordwise should carefully trimmed sharp scissors overlap end ribs least % Place small pencil marks paper edge across onto building board aid relocating panel panel should dried 2200 electric iron until stops curling un der heat heat drives moisture out paper shrinks smallest size dry flat panel returned index marks tacked using two three small drops cement building board along chordwise edge dry other edge panel can lifted like page book exposing wing struc ture underneath MARO WITO RIC RAGOrIA PEN - SCRIP 500 SF555 OW WIDE CA EASE VHID 0415$ *30 00550 I5550 oWBALSA NTRIPPBR SeEDS Li18154 SWETOROENO04 oaOjoVpr Ii 0A7 CECCECASO 0415454 DVTTERNJI54 IS C ETASO OZDSTRCr 05805 es / DcrAD r*rTVFNrO CLAR RIR COVER WINS C SEE PAFeRO FITTED PAFE ZZOF ECEI V VT C Pu AT P 5 COVER PANE 571* INTRO WING IS RAILS AE COADREE IN CTTERNPVIA ONE MAIN Fl TASE JOE SQUARE CO KEEP SPARS ALIONEC SIlTS PAT 750 POE- NERO TIP IS 00000 IN-TClE-AR TIP IS STRAIG ISO Deer OAIOIE541N4 PORTS IOCEEALN* ROUND OOOOEMOTOS AND LL.jD0POEPRDP K CLECRANVE CARIeS EORFRCONA-COSOBNSER PAPERCLEAO EASE JIE ESOCOT 005500TORSO PARS-S SO ON 050 WIRE VAT OOEOSIZR e PLISELOAR OLANS FROM LION AFAr IN ACIQAT SHEET OF SIN CONTEST MOOD CSVANE RLANA CO SIZE WITRLBENE NAHENS BLADE TCEENTTO BASE BOND_________AERS-DIURPRCR [POORER BOND r HI5T HI00 F ___________________ 8 0 LI 50AO SPROS ALOOF 4pK-no00 SDHT 08W OCTOOD AERTICALINTRIN GROOVE SPRUCE CROP SOAPT Li /CLAM OSLO M/RABDER RADIO TELACE DOVE SORE TO 50810 PROP DRAFT INTO RLRDE CEMENT PAINTS SODA ODE DRY PAT COTTON REEINO EIS-MIINIA 51EV BALSA 4ISSET ALSA BASE * ES Ak PROP SOAFT AS-S hOOK ASSEGELT PSOPASSESCOCY ADO EVOATO AAPT-VOTSAACT TOTREAS PAT 501 ElAtE VIP IANOZ IN EOF AC CE RNATEININCD 05EV DOT CEMENT AT 0 EINA RoOLE ASOAE T ANODE TOE 0000 MAEE TIP LDVPTON ON 010 5505 V COCAY SOOSING 68 Model Aviation wing tips covered after blocking wing up pattern jig prepared pa per panel tack-glued see text board before gluing tip wing panel Small drops clear dope placed again small drops dope placed along dope dries paper leadevery 34 along top near spar ribs paper lowered again ing trailing edges carefully trimmed paper lowered place gently drying place Finally paper lifted edge spars Use new pressed down balsa strip weight may little placing dope drops along re- double-edge razor blade useful hold paper down against maining spar after paper low- partially completed wing can spar After dope dries paper lifted ered place removed pattern/jig paper - 00 INTUOR 00000 RUBS oos500 BOOXRORTELOVO POWER TOROVE AND CIRCLE SITE AHECONTROLLED BY VO NO OFFSET IRE LEFT WING IS LONGER TOUN AEON SLMTUUOSC0LOOOETHE EIGHT EHTESS OFFSET CAUSES REVERSE BASHING ARE SMALL LEA. 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I-- .1B4F WITH BALL IA AS ER ENDI PITY PREFORMED SIADEIN JIG ADJUSTORTILRECORD DREAMING EZE TAT WITH SMALL OROF SASOTESSOTOOTH HObO STRIPS NOTCHED. 1 COHEP STABILIZER WHILE AUDIO DRESSELIAEDWIN STSECAHRDN 3SAUGWE ORESN 00TH SIDEDTITEBONDTREO AT ANO EFORSTEMPLATE CEMENTED TO TYVO BALSA SHEETS -OFREOFT WARN CR5 FIT BACR ____________ _____________ ____________________________________________________________[v32][b16453090141700]]WEDGEDESIGNED/DRAWN-GRNDLIN ROE 010 DATHEOTOER BLADE EAACTLT TEE SAME MATUPOEOE FAIREDRNDHIOSIAN BC CR00515 TORE - Full-Size Plans Available. See Page 186 January 1988 69 Left Fins stabilizers easy duplicate cover once bending form simple stab fin jigs made Right prop er wing post locations found moving wing slider until balance point falls 15A6-in behind slider Note tool being used Left propeller blade twist achieved drying wet blade section 5-in stovepipe see text details 2-in Ace band age holds blade place Right Use balsa prop jig assemble sizes 12- 14-in diameter 22- 28-in pitch completely cemented down skim ming little condenser paper cement point small brush along under cut edge paper press paper down onto spar paper will soon begin absorb mois ture air covering will begin get baggy about hour should get paper completely stuck down before happens Hopefully paper will stay bag gy life model partially-built wing returned jig Use square make certain raised already completed panel lines up pattern/jig second panel built covered same way wing tips covered blocking up wing proper angle using same book page method tacking cementing pre-dried paper seams paper dihedral joints tacked together small drops condenser pa per cement Stabilizer drawing shows both sta bilizer jig built jig de signed permit little dihedral introduced aid covering piece paper stabilizer built flat outlines 032 wide stripped 022-in sheet 5 6-lb balsa wet strips pulled around form shown drawing held silkspan strips Bake 10 minutes 200 0F oven resulting 4 bows should over-bent require open ing install jig rest stabilizer constructed same wing overlap rear spar makes rear spar stronger front coupled reverse airfoil makes model very resistant diving-out after rafter bump covering place 346-in strip wedge point shown drawing frame will probably stuck base center rib will pop up Cut out piece condenser paper about wider frame around Dry 2200 iron until lies flat smooth tack stabilizer tips small drops clear dope paper tacked front spar small notches jig permit dope placed outline sticking whole frame jig Finish tacking paper trailing edge After dope has dried trim outline new double-edge razor blade Gently ease stabilizer out jig finish cementing paper down using condenser paper cement applied fine brush Fin fin made bow made stabilizer bow form easiest way cover small jig made like right end stabilizer jig fin covered jig left side will hold its shape once covered Motor stick Find hobby shop sells 4to 6-lb Sig Contest Wood Select light est sheet %-in C-grain stock can find held up light should see light streaks wood least wide Cut out oversize motor stick light spots making about /16 wide 9 long will spring bend twist cut out must oversize start Gradually trim down size large sanding block cov ered 150 180-grit paper sighting down length will able see should sanded get straight Keep track size micrometers sand Once down size can give final sanding fine sanders shown drawing Trim stick 9 long stick should straight point bowed bent Leave edges square now rear hook bent 015 piano wire Smooth end wire sharpening stone before bending hook hook shape important Copy shape drawing closely possible Pierce stick hook sharp ened piece 015 wire Force little Am broid cement hole insert cement-covered hook correct angle should also line up viewed rear hook dry add oversize gusset shown drawing should Continued page 159 70 Model Aviation Left prop shaft pre-twisted blade installed jig tacked together warp-free Titebond wood glue Above Af ter first blade dries prop shaft turned around jig remaining blade added keeping jig settings same P&O tNbINLS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS Glider will cost another $125 post paid opinion latter will become favorite design OT HLG fliers once comes widely known Old-Timer Wakefield increasingly popular ships can flown large Cabin Rubber under new rules more frequently special events new design might want consider Ernie Linns Kansas State Champion Wakefield Two versions shown1938 freewbeeler 1939 folder can get full-sized plan Ernie $450 address 3505 East Mt Vernon Wichita KS 67218 1988 SAM Champs will week July 18 Lawrenceville IL will MECA Grand National Collecto July 18 flying will start July 19 traditional bean feed eve ning awards banquet will Friday eve ning July 22 am writing late September October 1 deadline will read December January issue meanwhile will go Mid-America FF Champs October 17-18 Lawrenceville check Out site report next column should March issue will get February will write November December 1 deadline y tention may quiz addition future columns will include rundown what now available replica en gines pans glow-to-ignition conversions sources other items needed OldTimer flier need help locate cottage industries involved Please send information news photos queries etc address below William L Baker PO Box 249 Norman OK 73070-0249 Serendipity/Noun Continued page 70 firm support hook dry trim gusset size add final light coat Ambroid trouble-free front bearing opinion Harlan EZB recommend get required /32 shaft clearance must mounted %2 hard balsa spacer shown An over size spacer glued front stick undiluted Ambroid cement dry trimmed flush front sides stick As thrust line parallel bottom stick trimming bot tom will necessary Harlan bearing should carefully trimmed edge burrs fine file mating side roughened little #400 sandpaper bearing glued position spacer Ambroid cement aligned holding up light bulb sighting through bearing holes hook end stick small balsa aiming point can attached hook help setting proper thrust line dry trim stick conform drawing Reglue bearing thin coat Ambroid entire base bearing should encased cement No other fastening required boom stripped small end first 075 width Micro-X 5 tapered sheet using Jim Jones balsa stripper brought down size large block cov ered fine sandpaper takes swipe two side get down size Trim 12y16 length careful ly sand smooth small sanders Dont try save weight cheating boom floppy boom undoes ad vantages get good stiff long boom round propeller spar made %2 sq balsa stripped 6h-lb sheet 12 long First hold sheet up bright light determine grain line Cut first edge parallel grain using steel rule guide Strip off few 3/33 sq blanks balsa stripper coruers strips trimmed off razor blade making roughly octagonal spar blanks rounded three four time using large sanding blocks shown drawing Three four blaaks placed larger block scrubbed smaller using slashing/rolling motion until round 067 in diameter takes practice patience until get hang never gets neat taper put same wayby sanding end spar time using edge area large block smaller block does strike larger tips should brought down 030 dia SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSOiA COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & KAB PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC lIE ALSO STOCK CARBON FiBER KLO7Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITION SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLA YBOY SR K17 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TiMERINCLUDING REPLICA OR WiCK ENGiNES January 1988 159 Puzzled CALL MATT No time build Mutt Ill hive time. md knew hew 1 Complete 2 Semi-Assembled ready cover sandedi Call 9am -8 pm lEST 609275-7264 Send prices Kits Engines accessories22 Mitts Model Building 7 Hampshire Drive Plalnsboro NJ 08536 Rate cards available reel SASE 14-rIB n9-1 121 also build Cars Boats WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER $1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes 64 wing span K 7A 6 lb weight 900 sq Fiberglass Fuselage melded wIng Jelner tube Plug-In Wings Fiberglass Belly Pan Optional Plastic Fiberglass Canopy Pie-Cut Holes Wing JoIner Tubes Ultralight Honeycomb Whgcores extra $35 42NSend check money order HIGH PERFORMANCE MODELS 9666 liSA St North Delta British Columbia V4C 6Z4 Canada Basic Kit $12500 Pre-Built Kit $32500 604-588-0605 Ereball R/C Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $149 Swanson Associates___ PO Box 151 . e NJ 07470N/Mi Find actual high point spar micrometer measure equal dis tance toward either end Trim desired length prop diameter less 4 Some touching up blocks will required after trimming Propeller shaft Bend 013 music wire Before bending should smooth end wire coarse fine sharpening stone keeps hook tearing rubber motor diamondshaped hook bent four well-placed bends using good small needle-nose pliers hook will require some adjust ment get spin true free wobbles Stone newly-cut prop end point Make few extras skill level up balsa prop shaft pierced piece sharpened 013 wire Try get grain shown drawing sharp end hook carefully inserted bent over 1 proper shaft length left shown drawing 2 hook positioned 900 shaft two precautions ensure hook will fit Harlan bearing prop can installed Any extra wire can cut off little finger-bend end should adjusted fit smoothly against shaft side motor torque will press down Cement shaft door cement After cement thoroughly dry hook/spar assembly should placed Harlan bearing fastened board stick checked radius track balance Bend shaft wire carefully until spar tracks perfectly Prop blades 300 angle prop blade material permits use much thin ner bladesand key making large lightweight props material 009-in C-grain-cut balsa sheet usually used forming tail boom tubes big microfilm ships lower ceilings 33A 4-lb stock can used plan go full blast Akron 5 5 A-lb stock should used Both blade blanks should made same 11/8 x 18-in sheet Regular Indoor ce ment used join edges sheets Lightly sand blanks sanders shown Reversed dress box cardboard un der blade helps Make prop blade template dress box material shown drawing Maintain 300 alignment cutting out blades blades lightly sand ed edges about 007 Put spar blade tip locator marks back side blades time Forming blades drawing explains put required twist wet blades using 5-in stovepipe can form 160 angle can laid out flat piece paper wrapped around can 160 line should permanently marked can prop assembly jig required attach formed blades completed shaft hook assembly jig easy make out A-in A-in sheet balsa Once built variety excellent props can sembled very little effort jig reversed usual Indoor prop jig provides access under side blade during assembly rather upper side Key points check dur ing assembly 1 prop hook prop erly installed clamping fixture 2 blade tip against centerline diameter stop 3 blade against se lected 450 station 4 balsa shaft lines up both pre-marked center point point blade will have jockey shaft height fore aft locations 450 station until will line up order place small drop Titebond wood glue shaft tip 1 let dry Dont try glue whole shaft once cement inboard end blade 2 let dry Because shaft straight blade centerline curved shaft must forced against blade cemented 3 using block shown drawing Small drops Tite bond cement applied stitch formed blade shaft along both sides shaft Titebond used because does shrink warp **** NEW IMPROVED*** * LI6w WMiii wE mere wrn Pow WANDIT * *DelErS AInlINd * *w-S * yOAI OIAI0IY t CORDS * *WstorDry *Stick Abrasives * *A Keen Machine gives exceptionalS S *sanding control tor eacellent tinish *59i5 BASIC nO 1 tat Wand 1 CAntS *oeanIs InCI 2 (At 1 hAlt-S *no BAles SpeCIalS *rOAnd wand 5 EACh 8 gIllsS *00 iS Delano InCodeS 3 flat 2 hall oondS *ands aaxdt 10 EACh *LgntsS * dlonal Wands Abrasives avAilable *C *WANDIT MANUFACTURING 214 288-5789 * * ox 266 R Mesquite Texas 75149S Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 160 Model Aviation NICE PERPOWOCE 0*140 LaABAIEER 6110BPS PROS LICEVWEICEY *10010014 BEVERAGE CARS TWO PULL SIZE PATTERNS nOUN CEOICEI ILLUSTNAYEE P*NRICATIE0 *140 PLYPEC IESTRUCTIONS S4. *00110001 PATTERNS EIIS RACE ER SIX PACE PICK EN TTELTLIGHT *US PAIenINO AI5 perfectly proporuonea ror modeling Curtiss Robin 049 Engines -Channel R/C 41 Wingspan Electric Power Optional 6*2*5 Kr arO3 Very few Isli scale aircraft ideally salted model flight appealing Old Curtiss Robin wan born spruce linen age beaatifullp proportioned rabber electric glow engines Easy fun ts build trainer-like performance Flyline Models Catalog hOc Prune lc3l 273-9593 INE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA over time applied thin sharp sliver bamboo spruce After first blade has dried completely assembly removed jig turned around other blade cement ed making effort keep set tings same both blades poor attempt can corrected soaking off blades trying again should prepared build variety propellers Serendipity easy make may have build few before satisfied Ive used 14in-dia 28-in-pitch prop record breaking flights far thats lot prop start 13 x 26 14 x 26 will over 20 mm 150-ft ceiling quite cool weather 13 x 24 good starting prop able turn 17 18-mm flight 150-ft ceiling 12 x 24 prop trouble its like low gear cargood youre stuck set prop blades has provided suitable prop particular situation can made Assembly fin should fastened tail boom braced shown Use Tite bond cement avoid warps later Use con denser paper cement stick paper boom boom cemented motor stick straight Ambroid should laid out flat board shimmed up match FIBERGLASS COWLS 70 cowls 9 wheolpants br Sig Pica Top-Flite Jemco Mason Pilot Stafford Radius Behrens Garmhausen W E Tech other kits plans One-piece laminated construction 01 handlaid tibergiass strong lightweight Send SASE tar price list piease include names 01 modeis interested parts tar call between 9AM9 PM EDT tar inlormation COD ordering hope hear youi JIBERGLASS ~AER703 890-6017 bept MA 05 1 Baa 530 Geadnice VA 240h5 motor stick Both parts should lightly pre-glued resultant stick should per fectly straight along upper side Cement stabilizer boom small drops Titebond preferably over simple plan view keep everything straight Keep motor stick vertical small square blocks wing slider shown drawing should made up trimmed equal weight completed wing separate wing posts prop weight motor specified drawing installed motor stick together wing slider slider moved fore aft until stick balances 15/6 behind slider left side motor stick lightly marked both ends slider future locations paper tubes will form wing attachment points wing posts slid bottom A-in-long paper tubes tubes posts cemented Titebond stick pre-marked locations posts should perpendicular stick staband parallel other front view may have lightly sand stick mounting point get things straight tubes dry lightly notch both posts shown drawing out removing tubes rear post removed cemented rear spar /t6 offset shown inrnmmmmmmmm I MOWNG LET US KNOW WHERE YOU ARE GOING II II II I I move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II AddressH II City/State________________ ModelAviation 1810 Samuel Morse Dr Reston VA 22090I ml over 150 NEW ITEMS YOU have never seen before NEW BULK Hardware Packs NEW Low-price glow-driver Power Panel NEW Catamaran Race Boat NEW RC Electric Hovercraft NEW Mini Sailwinch servo NEW High performance nicads NEW High performance Sed Controls NEW Pushrods NEW Adhesives January 1988 161 drawing Use Titebond cement prevent warps later Matching assembly simple front view wing post drawn board will ensure post installed correctly dihedral both sides After rear post completely dry wing should attached fuselage rear post bottom tube front post cemented front spar making certain 1 wing 900 motor stick top view 2 right wing has aboauat l/ incidence left Titebond dries ship should ready fly Dont surprised little overweight Quite bit material will removed mo tor stick during flight testing Flying Install prop rubber mo tor made according schedule drawing Put enough winds motor achieve level flight Adjust incidence required get smooth level flight left wing sags down ship resists turning increase left wing incidence about %2 readjusting glue joint front wing post Titebond can softened water joint reglued necessary left circle 30 ft diameter desired use left rudder little left tail tilt left side high viewed rear may added twisting tail boom necessary point youll able put about 1000 turns motor before crabbing stalling begins assert itself Crabbing stalling caused insufficient left wing lift offset increasing motor torque left wing sags down moves ahead left slip opens up left circle flopping ungraceful stall occurs re covery process repeats itself until torque drops down sustainable level point fliers crank left rudder go lower-pitch prop both Dont either Note wing twist governed torsional strength motor stick tween wing posts stick too strong torsionally between posts will re sist twisting bring crabbing/stalling carefully sanding stick between wing posts toward elliptical shape can gradually increase full power wing twist eventually eliminate crabbing stalling After sanding will note ship will accept little torque until finally will take full winds go up like Mulvihill model Also note motor stick too weak start will worthless also find useful sand little front rear stick shown drawing extra downthrust bend tail bend will help keep flying speed up thus minimizing need wing twist fully wound tail will usually tilted wrong direction right side slightly high causes somewhat larg er full-power circle must offset downthrust bend stick bend tail bend stall avoided Eventually some additional left stab tilt may turn out solution Another feature enables Seren dipity offset torque left wing flare steep full-power climb center lift much closer leading edge wing characteristic causes left leading edge bend upward causing flare helps left wing balance torque amount flare depends strength taper left front spar sharp taper causes flare appear out near tip good less tapered spar weaker near wing center will flare evenly over half-span wing will add considerable torque control causing right wing have negative angle attack flaring charac teristics models wing built spar dimensions Keep mind ever additional left wing flare can obtained reducing spar depth near left front wing post successive light sand ings sanding paddle curved block Rubber motor have using old Pirel li Wakefield motors strip down rotary rubber cutter Check around among Free Flight friends see can find some youll have use American-made rubber sold today Indoor suppliers Under low ceilings Easy Bs flown US-made rubber should useful because its flatter torque curve Lowceiling motors should shorter quite lot wider usual high-ceiling motor Level flight should almost achieved last full row knots Such motor should backed off 30 40% until model barely climbs Keep mind completed Easy B really finished After flying anything right can corrected soften ing glue joints water solvent re moving offending part replacing something better Fly model until get best performance out can build better model keeping mind structural integrity aerody namic harmony bit important low weight Finally real high-ceiling secret design its ability climb 180 ft full burst long thin motor spin off nearly winds slow open letdown Under Category II III ceilings has ability fly prop running 85 rpm very low rubber weight Suppliers Sig Manufacturing Co tnc Montezuma IA 50171 Ray Harlan 15 Happy Hollow Rd wayland MA 01778 Micro-X-Products PO Box 1063 Lorain OH 44055 Indoor Model supply Box C Garberville CA 95440 Jim Jones 36631 Ledgestone Dr Mt Clemens MI 48043 Franklin Chemical Industries Columbus OH 43207 CL Scale/Boss Continued page 71 operated nine-volt battery supply course set insulated flying lines re quired Instead using plastic-covered steel fish ing leader material insulated lines Jerry coated standard set flying lines butyrate dope says has used couple years problems White Jerry may have successful insu lating lines manner described believe use fishing leader material safer long run standpoint preventing electric shorts Jerry also noted two bat teries relays mounted fuselage seen photo serve balancing weight model Operation system rather simple required push switch hanContinued page 168 162 Model Aviation WACO UPF-7 I/ SCALE 72 1204COR LARGER SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 2069418248