NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10
Edition: Model Aviation - 1990/11
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 159, 160
NO OCR TEXT NO OCR TEXT Several accompanying photos should clarify toe-hinging procedure Make slots face around hinge lines covering material slit heat seal raw edges slot Slip T fitting attach hinges CyA cy anoacrylate glue Trim excess fin ish covering Fuselage Study section thoroughly before picking up tools turn pitch servos can standard-sized around 50 oz/in torque up-front rud der servo can tiny flap servo should squat possibilities including Ace Bantam Midget has quite long arm included output arm set Air tronics 94831 discontinued Airtron ics 94461 simplifies keeping hori zontal slot sides low position down-rotated bellcranks can clear slots yet still clear hatch low slot sures ample reinforcement around main tube Note relationships plans photographs Tack two sheets medium-density A-in balsa together cut out two slab sides precisely matched set longer left over scrap pieces joined together form bottom Mark accurate center line down bottom Flap-Mo simple mechanism shown photos Swiveling arms fit tube soldered across slider As slider moves fore aft flaps low ered raised unit mounts tow hook block shown another photo Slider Fashion unit shown plan bit overlength final length spacing end blocks will vary case case want about A-in slider motion reflex about 34 Left Wing incidence lowers down flap provide automatic pitch compensation Rubber Harleys Hinges Ace RC provide bun TIT unger small amount tension control flutter Right entire Roto-Flap system compact will fit nicely typical Two-Meter ship 26 Model Aviation --up shows wings exaggeratea len turn i urns mug ay ruirnung ne n tire wing panel panels move differentIally little up movement avoid adverse yaw swept rudder pout generates up sie vator effect keeps nose up turns increasing incidence Since wing panels also rotate pitch control no need traditional elevators Roto-Raven flight Roto-Flap system allows fast easy penetration along slow controlled flight circling thermals precise landing transmitter devon mix ing function required Dick Stuart took preceding color photographs .dvei freely turns also fore au aft operate flaps Note tow hook located center-of-gravity NO OCR TEXT Left Flap-Mo unit its swiveling arms link flaps As slider moves left flaps go down moves right flaps reflex Right Flap-MO connected its servo shown mounted tow hook block behind pitcheron servos down flap horizontal slot slab sides shown photos center line cross tube Flap-Mo shimmed needed Main wing support inlays %-in birch ply fit above horizontal slot Position flush inside surfaces slab sides Doublers Make matching A2 ply doublers fit between formers down / slab side bottoms Make sure theyre positioned identically formers will squared Matching holes Carefully align slab sides inside doublers tack together Mark centerlines main support rod A-in pivot wire wire drive pins same geo metrical plane bit below main tube better center drive pins root Check bellcrank will clear slot rotated downward trim nec essary drive pin slot radius taken maln tube centerline Using drill press sharp bits wood backing simultaneously drill matching holes Make horizontal slots Carve attach sub-nose block Cut out formers Fl F2 Add rail Fl coat other side epoxy servo tape sticks well Install both formers Cut out bottom top pieces behind F2 Mark centerlines cut 346 slots skid fin Attach stabilizer base light balsa bottom piece align attach piece fuselage joining F2 Add triangular stock recessed /l6 slab sides behind F2 Join sides making certain flush main tube precisely squared Add top bottom trim triangular stock fin Add thicker top struc ture fit hatch main nose block Cover fuselage Install main support tube using CyA position ends extend A2 panel clearance Contrary what might expected deflection panels needs quite large bellcrank design allows ample de flection servos normally rotate 450 way two ways mechanically crease panel rotation 1 Before sembly tap second hole bellcranks perhaps 346 lower 2-56 ball links ball links can moved down later necessary 2 Blank output wheels can customized larger ra dius Bellcranks have access piece A-in filled epoxy circuit board might try making bellcranks yourself Remem ber however must match pre cisely work correctly mounting run A-in wire partway through add thin washer bellcrank two bits tiny surgical tubing other bellcrank second washer 28 Model Aviation Left rubber hinging wrap covering material sealed around precut slots covering silt sealed Inward insert ed hinges wick Joined thin CyA Note T-flttlng next rudder Above rubber hinges extend through slots cut rudder exit along side end hinges cen ter slightly tensioned secured drop CyA trimmed slight amount excess later removal necessary T-fitting control cables can seen installed Left Links belicranks made all-threaded rod through brass tubing small rudder servo mounted sideways right Above 1-in balsa slab sides have % ply doubien Inside extending former former Triangular stock set back support top bottom sheeting slot visible tail section left fuselage aide Installing elevator Left right side fuselage showing inlaid 1-In ply used provide firm base main wing support tube belicrank pivot wire Flap-Mo cross tube aligns horizontal slot swivel arms move Right wing support tubes fit threedegree decline between balsa uprights provide wing dihedral three-degree wedge used achieve accurate matching fit Add skid tailpieces Run thin wire through fuselage allowing gravity direct under main tube CyA ca ble end wire pull back out run through T-fitting knot Built-up wing panels Make ribs ac cording instructions contained sidebar rib plots included full-size plan Take special care center hole main tube ply Ri ribs drilled simultaneously achieve matched set Make beveled tapered strips butt hinge line first cutting bevel /6 x -in balsa strip table saw equivalent Pin strip down straight mark taper noting changes rib R7 Cut hair oversized sand fine fit sequence built-up wing con struction follows Pin down bottom sheeting one-inch-wide hinge line sheeting strip Add bottom spar al ternately install ribs webs root outward Install A2 ply doubler first bay Make beveled tapered hinge line strips notch hing ing Install front strip add top spar Attach sub-leading edge Cleats added hinges attach Install main tubes drive pins Add top sheeting leading edge cap ribs Build cover flaps install hinges same manner fin Build install extreme tip Cover top wing add flaps cover bot tom Use opaque covering film avoid sub jecting hinges direct sunlight above routine few areas require comment Holes root R-l ply ribs per templates will build three degrees dihedral tube just under sheeting root Notch root receive tube end Add doubler A2 ply grain running fore aft over bottom sheeting hind spar assure matching dihedral three-degree wedge having 3A-in rise 7 can made placed under gled tube sure tubes parallel hinge line Cut block fit under tube glue root tube dou bler Reinforce around tube its well anchored Add triangular stock wher ever ply doubler meets another part structure Fill notch root Notches rubber hinges made 2 x %-in strip #50 sandpaper glued small block cut hinges wide 1A long hinges CyAd cleats along front 1-in strip epoxying cleats place sure keep pores open attaching rubber CyA Using cleats leaves about 34 rubber free stretch flap reflex Fish ends through little slots first two bays Loose hinge ends wicked cleats under very slight tension fact -in hinges its sufficient have slight ten sion end center hinges alone just taking slack out rest tension hinges might make diffi cult servo reflex flaps chor hinges up front invert panel put small drop CyA slightly stretched loose end no tension used hinge simply allow go slack before pulling up against cleat Leave some excess hinge replace ment should necessary can slowly pulled off debonding Wing incidence Cut strip approximately 2 x 10 A6 balsa sheet Angle top three degrees Trim fit just under main tube Apply masking tape draw series three-degree parallel lines Position incidence template plot over tape bit lower wing panel its chord line parallel above lines Drive pin alignment Cut two pieces /16 ply hard balsa about 2 long jam snugly between spars root rib outward Mount wing panels Run 5-in piece A-in wire through slots bellcranks radio square up output wheels Adjust pushrods bellcranks identi cally upright wire perfectly squared Position jammed-in ply pieces contact squared-up wire per fectly Tack glue spars Care fully remove wing panels Fill behind ply pieces epoxy balsa wedge firmly secure Cut two 2A-in-long pieces A-in-ID brass tubing Rough up outsides Re mount panels wire Slip tubes wire clear fuselage sides about Y16 Using incidence template visual reference set panel three degrees Tack glue drive pin tube its ply upright Eyeball other panel same incidence tack tube place Re move panels Glue blocking epoxy November 1990 29 wing cores come sections precut spar locatIons section used incidence drive pin alignment procedures Refer photo review section article explains procedure really isnt complicated 1/16 BALSA WING SIGNS TOP BOTTOM BALSA CAP 2-2/IS SPAR IS BARALLEL1/32lAB 1/4 APRILE TO LE. IT STOPS SI UT ABA TEXTLVWEB 11/32 TUBE BALSA CAP 1/ BALSA FOAM CORE ROOT DETAIL -EXLEOEMOOL PUAM CORE WINGS -INOJJG PURCHASE PROM H SMITH SAME FLAP AS BUILT UP WING PANEL ~HIGH OEAT FOI ~9gTED BOTT NOTCH CORE TO PUT IN HARLEYS HINGES 1I-I/iA 7 44--- 1 /R9 R 10 BALSA ON SERVOS AND CR/5 M BALSA BLOCS05NE \I/RAASA\ CE R F-I I/S EPOXY FILLEDI/BH CIRCUIT BOARD BELLCRANK2-SR AS USE DUBRO RIGGING COt SULLIVAN ALL-ThREADRUDDER SERVO TO ATT ROD IN 3/32 0 BRASS --I~jTT BALSAISENER C NC -~I BLOCKSERVOSF above below tubes sheeting Cap end tubes make drive pins cut two pieces wire length Round end file notches shown plan Attach wing panel run drive pin tube Slip collar tighten set screw together keep wing panels place collars critical Make sure theyre tight Rotate drive pin easy access setscrew wing tube jammed fuselage collar bellcrank wick CyA between tube wire both ends Repeat other panel Trim roots theyre parallel fuselage sides about A2-in clearance Foam-core panels Since foam slabs manufactured 96-in lengths 32-in cores can cut yield three sets slab extreme tips can made 1 longer 78-in span course have good stock foam-core blanks sim ply cut 33-in lengths Selig 5D7032 airfoil foam cores cut terminate 3/ forward hinge line Since too little material left make flaps built up traditionally easiest drive pin alignment spar positioned bit farther forward built-up wing Because %2-in cut runs parallel leading edge easily made table saw equivalent Make matching slots main tube semblies parallel hinge line Cut wedge three degrees Y8-in rise 7 %-in balsa see photos Trim wedge its % high its low edge outboard point 4-in tube harder /~ balsa cut 334 uprights fit between bottom top sheeting Place wedge under tube tack two well-squared uprights sequence Bury tubes epoxy balsa glue units core dihedral alignment procedures again refer photos clarification similar described builtup wing panels using rear core sec tions drive pin brass tubes sepa rated spar wedges spars constructed separately us ing x / spruce A-in shear webs Due lack parallelism between up per lower segments airfoil spar assemblies can made little under indicated height shaped core contours soft balsa long strip As ply placed face assembly After drive pins well anchored stall spar front section core Add A-in root ribs fill around tubes epoxy Prepare /I6 hinge line strips match core height slope along hinge line fit between skins Cut x 1-in notches cores 30 Model Aviation Full-Size Plans Available. See Page 212 xIIThTh EN----s iIEI i~2 ~---- RI R-2I/16BALSA WING SHEETING R-3TOP ONLY- /16I/A BALSASOLID OR HOLLOWED B-HCAP STRIPS ON BOTTOMBALSA WING TIP 3/32PLYRIBR-6BUILD 1/4 WASHaJT GD--- ___B-iIN THIS TIP ____ --B-B FILL3/33BALSA~ zR-B RIBSII14 BALSA ID EBS------B-Il _TO ROOTSHEET WEBS ---~IL RT GRAIN BOTTOM CAP TO TIP STRIPSOPEN 'L _________ YLR5/ 6 CARBON BOTTOMF1BER FILLBOTTOM BOTTOM -1/32LINE 140F NOSHEETTOHARLEYSlIZPLYAIRFOIL PLOTSLIACLEATRIGHTWINGPLAN HEREHING51 IIIU IFIT bY_ LJL _ 1/32 PLY BASE -CAP3/IS BALSABEVEL INSIDE FOR COVER OVER HORNSHEETFEATHEBINOHINGE SLOTS B-I 1/4 BALSA H-2 LEADING EDGE H-4 __________________________ B-S___ B-A I/B BALSA IFICATIONS SHEET SUBWING SPAN .7B LEBOBO EDGE.--v.. -------WINO AREA.. OBO SO IN AIRFOIL 5D703DI _______--9LENGTH45-1/3 I/B 3/BWEIGHT 35-36 OZ SA SPARS3/3D PLYREQUIRES RADIO WITH ELEVON LEFT WING BOTTOM S NO FUNCTION -4 SERVOS OP N VIFWREQUIREDSTABILIZER __ 1___________ 3/16BALSA SHEET-NOTE-NO ______[IA SHEET ________ 5/16 C-GRAIN BALSA DBERGELEVATOR P-I ROD BALSAI/B BALSA SHEET TOCKFUSEAGE SIDES1/4 BALSA TRI-STOCK 11/330 D BRASS TABE I DUBRO 3-NA L--- BALLLINKFUSELAGE TOP VIEW__~~" nI - OJlIL-Ltr - - --- 3/IA BALSA SHEET LIGHT C-GRAIN 3/32 OD TABE I/32PLY DGUBERS STURT I/BHARLEYS HINGES/ / / SLAB SIDE BOTTOMACE 50L317 I/B 0 D CROSS TARE FIN INSIDE I/IA I/A BRASS SLIDEROPTIONALIf/4f LIGITENINDI{// / HOLES I/B PLYI/IA PLYWOOD/ INLAY/2/i WHODA BLOCK -MAPLE I/IA BALSA SHEET TOPLS PLYTOWHOOK /I S BOTTOMFLAP -MOf I/B BALSA SHEET FUSE SIDESI/ 1/32 PLYWOOD DOJBLERS INSIDEOTI /VIE OVEfl/ IN rNVuW/RUDDER ___ -__IVIe,wITh ________ ____'I/i SHEET OWHOOKI/B BALSAF-DN SHFFT BOTTOMFUSELAGE SIDE VIEWV4BALSA TRI-STOCA 9 234B MODEL AVIATION 6 ROTC RAVEN ROTO FLAP ORIGINAL DESIGN DESIGNED BY 14*RLEY MICHAELIS TRACING BY 2fl flUAmm IALL BIAHYB rubber hinges located Easy skinning thick green-label UFO Hot Shot accelerator Satellite City make skinning foam exceedingly quick easy Try simple technique Pre pare skins spray Hot Shot Avoid spraying core material Apply bead UFO core perime ter wood edging leading trailing edge end cap etc Also apply UFO chordwise two- three-in intervals no need rush thick UFO sets very slowly core bed flat workbench lay skin Press core other bed UFO fires seconds skin good Washout will faithfully preserved No weighting no wait ing Repeat process other side top bottom cores can fully partially sheeted Skin underside theres least overhang around doing partial sheeting use 1-inwide strip /I6 balsa along hinge line same manner built-up wing full sheeting used bottom cut through bottom skin make access holes 1 long leaving hinge line before adding top sheet ing Sheet top install thicker hinge anchor cleats tweezers made x 2-in piece 030 aluminum handy tool grab hinge ends Flaps Cut bottom shape bevel rear edge / easily done Dremel table saw blade tilted practice scrap Add hinge line strip avoiding glue notches Cut out stall ribs Make matching brass horns install between layers A2 ply Add balsa fill overhead install top sheeting extreme tips can solid hollow solid tip could shaped cutout made rib two hollow tip pre ferred cut bottom size add A-in thick rib two laminated %-in ribs cut top oversize wick place sure include bit washout either type tip flaps pivoted shown area distribution about 40-60% subject distribution around pivot point rela tion servo power overall area seems warrant broad investigation 50 oz/in servos 40-60 split produced nor mal operation typical launch thermal procedures Such things snap rolls during high-speed zoom dive may another story Flight preparation Initially adjust travel pots maxi Continued page 159 November 1990 31 five-channel Futaba PCM factory programmed pull throttle back about one-eighth full plane loses its signal air Thats great plane idling ground guess what suddenly accelerates one-eighth throttle Everything happened fast am 100% sure transmitter off However got truck plane crashed transmit ter off So am pretty sure am culprit PCM radios fail-safe great please remember lose sig nal air ground throttle going move Wind penetration wind penetration F-86 give some advantage statement appeared newsletter re port April 1990 Top Gun Scale con test statement concerned first- second-place aircraft both Vio lett F-86F Sabres recent Scale contest Virginia bumped good friend Bob Crosby hadnt seen quite some time Bob reads column suggested get some thing controversial going againlike downwind-turn myth So correct think Im wrong no such thing good bad wind penetration comes either model full-scale flight performance open ing sentence segment should have said high airspeed F-86 give some advantage Letters sub ject encouraged Have safe month Roto-Raven/Michaelis Continued page 31 mum throw Adjust aileron differential pot minimum movement upturned panel Connect flap servo throttle chan nel use trim tab three four de grees reflex maximize penetration flaps channel 75P Spo Elev pot gives pitch compensation Move TIiebull 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 Wayne NJ e 948 07470 November 1990 159 RAINBOW RUNNER 25 or 45 Gfll PRLCISKN PRoDUTS INC 714 5925144 510 E Arrow Highway San Dimas CA 91773 AT LAST An Effect ye H gh Tech Engine Cleaner RIC Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longor Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INQUIRES WELCOME Kraft Midwest Inc 115 E Main Northvilie Ml 48167 313 348-0085 FAX 313 348-4175 Ultra Narrow Band AM Receiver Model XMRDC4-7A Years developing bw worth wait Special Agreement RCD Rxs SO & 53Mhz Complete 6m conversion Available Specifications Size 275 70mm x 165 415mm x 825 205mm WeIght 165 CL Working Voltage 38 60 VDC Temperature -10 120F 10 Khz spacing Bandwidth 1 85 khz 60db down 3OiP 3db image 60db down B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane SaverTM Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xix 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 6 volts Works 4 5 cell packs capacity Can used servo normal reversed mode adjustment sets failsafe throttle limit 0% 100% failsafe throttle works normally up set point ttle operates normally failsafe mode Compatible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additional See local hobby shop call Retail Price $3995 Applied Engineering 214 241-6060 PO Box 5100 Carrollton TX 75011 division AE Research coporation Prices subject change withsat notice 160 Model Aviation fully counterclockwise Use plenty rudder throw first sure flip switch couple right stick nose comes up too much rudder input reduce deflection just stays level turn lazy hands-off thermaling bit rudder trim will keep plane level balance point shown along three degrees incidence should pro duce nearly normal level flight liberal self-recovery hands-off dive Since theres no elevator wing incidence ad justed pushrods level glide Hand glide model making throw adjustments until handles satisfaction just would ailerons elevator Get feel things before towing Towing tow hook position shown plan provides very steep climb may want locate farther forward beginning Tow fly flaps ini tially get enough altitude hands-off dive test airplane bal loons too much balance farther back retrim down leading edge want just bit hands-off dive recovery best handling performance Check flap effect safe altitude ship dives take out some pitch compensation still wants stall pitch compensation maximized reduce flap travel increase elevator travel push elevator stick forward needed have transmitter el evator preset trim switch could adjust some down elevator fulldown flaps Flap manipulation turn pitch may used fly Roto-Flap ship transmitter has stick assemblies hori zontal cylinders manipulate flaps dur ing launch turn thumb cylinder turning can input bit down flap help keep nose up rather increasing wing incidence would risk stall lower speeds Roto-Flap control system can open up whole new world Soaring challenges Give try Nats General/Mankowski Continued page 37 Radio Control National Championships held site some managers direc tors categories came early ensure variety surface site preparations would take place timely fashion Event Directors 1990 National Model Airplane Championships should con gratulated alt being able assemble site extremely good official crews 90 Nats smoothest-running events recent memory perhaps smoothest-run Nats time forces work think Nats being good local community enthusiasm expressed its smiles its welcomes advertising banners signs hung over towns Vincennes Lawrenceville seemed put arriving conFeatures Duai conversion Dual AGC Crystai Ceramic Filters 50 53 72 75 Mhz Connectors aii Kraft styles Deans Worid & speclais List Prices Speciai War p Speed Service Exceeds AM Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Une Units Negative Pulse add $1000 Dealers Discounts available Rx Trade $5-$10