Luton Minor Prototype

this ugly aps ne anon ugly ng qualities atever mo deling friends are a say Hell never pick subject isnt ugly enough Admittedly attraction such less-than-svelte aircraft Stitts Junior Farman David Baby Bomber Wittman Big X etc may perverse Nonetheless cer tainly enjoy seeing such ungainly ugly creatures fly beauti fully Luton Minor prototype near-perfect example perversity may ugly sin flies like angel fullA correlation d birds can b s ed strearr nearly well cousins As exams airworthiness o cock buzzard Development Luton Minor Scale modeling did begin us inspired Hurst Bowers smaller 15sized RC design January 1971 American Modeler turn outgrowth Free Flight Eric Fearnley December 1953 Aero Modeller Hurst also re sponsible delightful 020 single-channel RC Luton kit availeven flitted rom Fly Peanut published k morn derivatives version Luton differs longer oleo-strutte separated wing i horizontal stab ferent power could easily LA4a ii 30 Model Aviation tottering moiei characteristic ot pre-WW II British aircraft though relatively simple decorate Vinyl lettering obtained stom Pactra Poly-U paint used trimming Li ted LA1 i rdsee ho win foolboth construction imer-Nei ility viceless has lent economy ofrid operation andugli ness worldwide basis Luton Minor has d September more-enduring home-built design Yanks familiar Notice resemblance design Heath Parasol Les Longs Longster Pietenpol Air Scout have common lot wing area low available power course rather large model flies well such small engine years have admired Luton Minor old issue American Modeler has opened many times what really wanted develop elliptical-surfaced prototype good friend Johnnie Carrol Ireland hes fre quently judge Scale World Cham pionships came rescue vast collection reference material small three-view March 1937 issue English magazine Flight Coupled several photos G-AEPD gave us impetus start drawing Incidentally name Flight article Lively Lightweight appropriate model well Further inspiration came copy believe Walt Mooney brief text June 1958 Aero Modeller sent us article says Walt found Frank McNatty New Zealand has impossible completely eliminate dihedral 020 Free FIght Minor prototype would full size will shortly explain 32 Model Aviation bolt through flat section K&S brass soldered cabanes holds rear wing front retained section brass tubing slides ply grabber wingsimple works Landing gear two-piece torque bar-box unit adapted stock Sig gear Banner wheels used Removable hatch accesses tank bat tery OS 25 FSR Davis Diesel head Slimline muffler shown Fox 19B8 9-4 prop good choice br model author feels Cowl obtained Fiberglass Master Pilot figure must Low aspect ratio wing coupled long tail moment reminiscent Ed Heaths Parasol same era Balance Luton 30% wing chorda long way back since chord wide production version Luton Minor Irish registry now thought US Note enlarged fin squared-off stab particular airplane powered license-built Aeronca twin called JAP England Thanks Johnnle Carrol Ireland photo 6 F AILERON LINKAGE 10 SERVO IN WING CSEC11ON flAIVP -I NOW PUT C&IEL- I/4X 40 BOLT ThRU SIG SH 218 BLOCK ON 1/4 PLY BASE 1/16 SHEET C/S COVER TOPANO BOTTOM CS 1/4 SHEET BALSA I/B X 1/4 SPRUCE JOINER 1/4 X 3/8 BALSA SPARS I1/16 X 1/4 BALSA 3 LAMINATIONS 1/4 X 3/4 BALSA POSTS FOR FIN RS AND RUEOER 3/16 FOAM BOARD FILLE STAB AND RUDER 17 TILLER STRAP TO RUDDER I/BSO STRINGERS IN 1/8 BALSA FORMERS SPAR JOINER 1/4 PLY CABANE GRABBER WITh TUBE HOLE 3/32MWIRE FOR MAIN LIFT STRUTS ANCHOR INTO 3/8SQBLDCKS 1/16 MWIRE BRACES TO FIREWALL SCREWS FIBERGLAS COWL COAT HANGER THRU PLASTIC CLIPS 9X 6 PROP l/4PLY HATCH2 1/8 LITE PLY SIG 5H125LAM PLYFOR L3 MOUNT BLOCKSLIFT STRUTS 7/ DOUBLED I/eLITE PLY SIDES FROM 1 TO 3 3 BANNER WHEELS 8W-PH 0220N 5/32 M WIRE SIG RPM 231 SIG SH 132 BRACKET 1/450 BALSA LONGERONS 5/16 X 1/4 SIG TE STOCK 1/4 BALSA SPAR FILLER 1/4 50 REAR SPARS -fop AND BOTTOM 3/32 BALSA ALL RIBS I/16X 1/4 BALSA TIP 4 LAMINATIONS 5/BX 3/4 BALSA LE 1/450 TOP SPAR l/4X 3/8 BOWOM SPAR DUBRO 202 STEELSIRAPS INTO 3/8X LIFTSTRUT ENDS ITER 1 IVI L picture conjunction text shows get wing straight grabber centered fore-and-aft alignment struts determine horizontal plane stays jigged until epoxy has cured String running wing tail post check squareness simple model structure lightweight has much strength high-stress areas its needed structure blends traditional techniques modern ones E4 V NOTE RIG AILERQNS FOR LOTS OF UP LITTLE DOWN IBU PLY v07R BALSA W1ODBAkS2 I2 EACH TIP ALAMO OF 04IIC BALSA WING TIPS SCRAPTOP SPARRIB FILLER LWAINATCD7P1P LOCW0AOOLL SEAASWING TIP DETAILBOTTCM SPAR TO BLEND 1510 TIP BOA AND TILLCYD LO C I2CO V2 TRIANGLE STOCKJ I/IR MUAC WIRE 7 7 I41 030PLASTIC WINDSCREENABBE WILLIAM BROS RI 3/32 PLAXKINO GLASS COWL FROMIR 55 fIBERGLASS MASTERIa ORB tII LPAOE FROM TO OZ itl LOOP N ATTACR TOBII w - WrEB SCREWS- A8 SAtLASEA 1 REC I HAYESLAM PLY AL-OSRATER MOUNT COAT RANGER WIRE NON FUNCTIONAL STRUT LOOSE OOP AROGYC MAIN AXLEYII I/4PLY DES SHACK BUTYRATE CABLE CLAWS As far know first pub lished RC version Luton Minor LA4 prototype rather unusual model has pure delight us design build fly recommend builders pilots skill levels Construction Wire parts portion design frighten away prospective builder would probably cabane structure Therefore lets get started cabane pieces bent pairs 2-in music wire will bend rather easily large Vise-Grip plier bench vise used cutoff wheel motor tool also helpful Always discard misbent pieces rebending almost always un satisfactory Use drawing pattern develop half bend second match top right angles need bent parallel other bottom bends can left over-length Cut after installation through laminated ply sides Position two halves over drawing 34 Model Aviation -i novel method construction developed tail surfaces Foam-core board cut outline perimeter surfaced layers balsa strip glued Onto foam Hinge lines 3A6 x balsa No ribs other structure needed innovative system FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 XBLGNT SLIGHTLY VASOBALr -- 1fF LX ELYI8PLY TOP SPARF~-- GUSSET _ _ 3D C GRAINI ENTER-L---WING BALSA RBS f jfF GHTL DU WARDCENTER RIBS FROM SO AOLMASTER LEGS 3/3D tOTTOM NOTCH TOE ROT IFOR I/A PLY ThREADED REAR MARS- BLOCK -I IFFFFF3/SDBALSAFI[ FilSHrTf 5JPLAN Sb S/C 3/4 LEADING EDGE STOCK 7 LAM EL GUSSE SKORNF\ FOR S RUTS TOP VIEWAPLA 0KM 0 RAP2/ NFB A-BALSASCRAP BALSAVA INFLL 5HINGE VK ELY Al ERONS ARE U F- ~-ROM ASSEMBLED WNGK PLYGOLDBERG AC DAB COGELER UBRO DOD STEEL REAR STRUTSY PS EPOXY INTO 510 PRE-ORILLED Th KSR-RB =../ FRONT STRUTCENTER SECTION DETAILI/CAO BOLT UK ELY WING srRuTs010 3/B AILERON STOCK VA BALSA INPiLL TOP 3/32 BALSA OTTOM iRPER 0FORMERS[I FUSELAGETOP VIEW -7 3/IA FOAM BOARD L43X 6ASS 5OLOERLA3/R BALSABALSA TOFLYWITH5 F ThIS POINTDRILL UKHOLE FOR NYLON BOLTDEFLECTIONS 11-RUDDER 1-1/2 TOYAL TAREADEDSOLDERVIA BRAGSOLEVATOR TOTAL SHEET -o oo-W/BOTTOM LW ELY ELATE O BRAGS YORE3/3D MUSIC WIRE UK BALSAAILERKER 1/2 UPBALSA FLUSH I/4DO NYLONTLWOTTLE CABLEI/A SPRUCE BOLT7TO SUIT ENGINESELIT SIA3/IA FOAMJOINER BOARD BATTERYNYKODATREVA3/B BALSA CABLETO SliT SERVOS FlRUDDERS LAMINATIONS I/B SO SPRUCEFRONT VIEW BFRONT VIEW CI/IA I/H STRINUEUK LITE PLYUK LITE PLY 6EDSEOFCPEELED HINGESELEVATORSTAB / SCRAP BALSAVBS/B ET I/B ANY S BRACE IDA BALSABALSAI IPINNED LEAVE RAPffrHINGE __ METAL TILLER BA-HO BOLT AG SH-13D NOROR SLOTIALWTSEEL ER W UK VO CROSSBRACRET LONBERONS I/ASOPIECES SIDE VIEWLUTON S MINOR PRUTOTTEE ERG I/B USE5/32 MW OR MODIFYSILHOUETTE SCALE 215 NIPS DID RPM D31 ONITSPAN 56 ENORD Il-I/CMINOR rnNuIrr TED WSHAREA OBO SO PBLUTON WEIGHT BO 02 ELSPOWER 20-30 CU INSP"""DESIGNED S DRAWN BY DCC MATHEWS TRACING BY JOE DEMARCO 0 2 3 A5 K FROM MARCH IL IBSVKIIAWE LAM LY ELY EPOXY 7 LW BALSA using scrap balsa proper dimension separate Tape pin units exact alignment join sweatsoldering section 7/n-in brass tube over Use heat soldering iron long enough flow solder way through tubing Wash thoroughly dope thinner remove flux after sol dering rear cabanes fabricated much same manner except pre-drilled /4-in-dia section brass sheet K&S #246 excellent wrapped copper wire Sig SI-I 330 soldered wire stubs Mark bottom stubs onto ply fuse lage sides drill outside cabanes held against formers sides split sections Sig SH 125 bass wood trunion blocks possible error step would alter height September 1983 35 Left Pushrod anti-flex braces pieces scrap balsa strip CyA-glued around rods loose fit Right Cabane wires bent silver-soldered over plans Theyre epoxied fuselage sides within sections Sig grooved landing gear block picture shows alternate wing grabber front strut Its nose wheel bracket has drilled out can bolted wing place mid-line side Measure ac curately forward struts held firewall #4 sheet-metal screws running through loops bent wire can retained soldering onto brass tube wrapping soft copper wire should installed after finishing landing gear can modified Sig RP-BM-23 unit can made 5¼2-in music wire torque-wire unit type adequate absorb forces drag wire purely decoration bent section welding rod loops hold mains fire wall brackets plastic cable connectors found Radio Shack store Wing struts functional Pick out some hard pre-formed aileron stock brackets Du-Bro steel units bent shown epoxied saw-cut slots ends Although have held up exceptionally well small stubs /6-in dowel run holes would certainly wasted effort steel brackets should accurately positioned epoxied during rigging steps ends can contoured sanded after final positioning Tail surfaces several years have laminating tips over foam-core board patterns removing proj ect chose leave foam-core board place Although unorthodox idea has worked out very well Try yourself share excellent approach curved surfaces Heres carbon paper between plan foam-core board trace inside edge tail-surface outlines pencil Cut foam-core board traced shapes sharp modeling knife Use aliphatic resin Sig Bond etc glue hinge line strips soak /16 x a laminating strips am monia water bend around pe rimeter foam-core board Masking tape used hold laminations place remove tape slowly carefully once resin has set tendency paper covering foam-core board pull off tape Sand balsa outlines half-round contour represent tubing structure full-size airplane Thats Its quick strong inexpensive neat MonoKate FabriKote recom mendations covering dope form will attack damage foam avoid sags avoid pressing covering down anywhere other perimeter heat gun used judiciously best shrinking covering Wing Standard construction used throughout ailerons cut faced after wing panel laid down Tips laminated around foam-core board form much like tail surfaces edge board faced Sig /4-in Stripe-Rite tape prevent adhering laminate form laminate course removed 36 Model Aviation Laminate wing tips around form cut foam-core board Soak balsa ammonia water easy bending use aliphatic resin glue protect form wing Only SO glue will stick Struts attach Du-Bro metal strips sheet metal screws 9O aileron horns tilted slightly give up down helps avoid aileron-induced yaw study of pictures well plan Hank Clarks cutaway will make construction much easier Docs got different engine pointa K&B 35 Davis Diesel conversion after drying overnight Dihedral gussets custom cut fit saw cuts made flush against spar faces threaded block mounted ap propriate cut-out joined center ribs ply sheet place / ply grabber trial-fitted epoxied un til rigging step aileron linkage should setup differential throws angling 900 bellcranks positioning horns used Goldberg AC 246 connectors Du-Bro 183 hardware simple wire stub would work just well Planking other ply floor should left off until jigging step has com pleted allows use clothespins and/or clamps hold center section adjusting Fuselage Construction classical way Two identical sides joined bulkheads crosspieces form box Three bulkheads interlock laminated ply sides tail post pulled together joined over top view drawing laminated ply two layers Lite Ply pop lar joined thin layer 5-mm epoxy weighted flat surface Cabane wires should installed prior putting turtle-deck nose sheeting sheeting can cut clear wire joined sides pulled down onto x strip Glue thin beads thick CyA turtle-deck stringers place trim off projections formers between avoid starved horse look Build up land scrap balsa around wire tail-wheel bracket screwed onto ply base tiller arm held rudder strip sheet metal run under either side horn As alternative skid wire would scalelike would work satisfactorily cowl held firewall small sections basswood #4 sheet metal screws Openings must made cowl choking air passage around shaft out around head muffler fiberglass unit has sufficient strength re main usable after large chunks cut away Sufficient room available mounting engine sideways upright inverted Warning long tail short nose moments Luton Minor require careful attention weight distribution 500 mAh battery pack used model weight needed As rule feel have done good job engineering design requires no ballast just no way Luton Flown initially dieselised Davis K&B 35 dieselised OS 25 FSR model needed /2 oz Sig 562 weight screwed firewall face lighter much easier muffle cowl Fox 19 BB needed full 3 oz Fox 1 9BB muffler clears sides need trickery very satisfactory Continued page 138 FOX INTRODUCES THE NEW COMPACT 40 RC WEIGHT9 oz Bore840 Stroke715 RPM 10-6 prop13000 24099 Compact 40 RC $5995 90236 Tilt-Up Muffler 1495 90237 Tilt-Down Muffler 1495 FOX MANUFACTURING CO 5305 TOWSOH AVE fORT SMITH ARK 72501 Hot Line 15011 646-1651 Youre wondering offering new 40 existing 4088 powerful rugged 40 market Well unfortunately massive construction 40B8 makes too large fit planes calling 40s answer new Compact 40 gives outstanding performance Fox lighter compact frame model interchangeable K&B OS HB Enya performs excellently no-nitro fuel superb idle transition recommend new Compact 40 size weight factors larger frame 4088 super-durability desired September 1983 37 $895 New Specials $795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send $50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carrollton Tx 75011-5010 6156 t45 Ait Colors stern Fronf I find regular issue SAM 35 Speaks editors name David Baker 22 Ellington Rd Muswell Hill London NlO 3DG England long-hand slip sample says American modelers may obtain copy $700 Perhaps youll want inquire first perse vere Stop must Bill Winter 4426 Altura Ct Fairfax VA 22030 Two-Meter/Jolly Continued page 28 Mike Regans model could des cribed typical Valley competition Sailplane features fiberglass fuse lage incredibly strong wing foam spruce balsa construction Mike Bame 15% airfoilalways good taste familiar current F3B scene coun try will recognize similarity Alex Bowers Tai Tai special interest Mikes model has conventional polyhe dral geometry leads wonder ailerons really necessary high-speed Sailplane Close Regans heels another SFVSF member Mike Bame fin ished second Mike flew aileroned version Sailplane flown Regan Mike Bame very innovative modeler responsible developing materials techniques used fellow club members Speaking SFVSF no sur prise see its members claim five six top places clubs total com mitment advancing Sailplane tech nology has given members both models experience necessary well multi-task contest cause great depth talent SFVSF can muster members club will certainly strong force contend long choose compete effort away winch advantage SFVSF construc ted six identical winches use contest course gave contestants equal chance good launch memories have contest sticks mind good times generated meet Everyone came have good time did fact have good time anyone didnt should perhaps think about compete hobby/sport Personally enjoy multi-task Soaring other phase RC Sail plane flying concept TwoMeter World Cup allows others like myself enjoy thrill chal lenge closed-course racing something possible more-usual Sailplane gatherings members Modesto RC Club SFVSF particularly Mr Hanson congratulations job well done looking forward Fifth Two-Meter World Cup See Luton Minor/Mathews Continued page 37 turning 9 X 6 prop Idle marvelously slow reliable mid-range excellent adjustments breeze Rigging photos illustrates technique Start nylon bolt threaded block Measure block up both wings exactly same height off board wing bolt screwed Run string tail post exactly same point both wing panels keep adjusting fore aft position grabber loosen ing clothespins until exactly dimension determines left right thrust must zero-zero Once wing panels equal dihedral left-right grabber epoxied clamped against wing structure Avoid later necessity raising lowering wing incidence carefully measuring against flat fuselage top time After epoxy has cured unit still jigged glue steel straps strut slots 5-mm epoxy ends should screwed pre-drilled holes Rigging difficult complex However requires patience care dont hurry Covering Finishing has Mono Kote wing tail surfaces Sig Koverall fuselage Koverall heat-sealed over Coverite Balsarite heat-shrunk Three coats clear nitrate dope followed two sprayed coats Pactra Poly-U fuselage wing leading edge trim Poly U Numbers EZ-Stik vinyl6 wing 4 fuselage pilot figure Williams Bros 2i-in standard unit painted paint plastic models Banner wheels go nicely model Flying Ground handling takeoff roll must seen believed thing gets up its mains will run straight down runway mile Apparently lowto-the-ground fuselage high-up-in-theair wing combine produce truly extra ordinary handling Luton Minor doesnt need rudder stabbing steerable tail wheel get going straight down runway Just point direction want advance throttle other hand tracks darn well difficult turn around taxiing cares climb-out function wing engine intended climb prop rather uses speed climb wing steep pull-up such clear deck portion touch-and-go pre pared witness strange phenomenon 138 Model Aviation Power Soar New Heights self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 LT-50 Electric Motor 01 Cu equivelent gas engine displacement / CANNON SYSTEMS 13400-26 Saticoy Str.t North Hollywood Calif 91605 PIoo 2131764-1488 SUPER-MICRO FLITE PACKS Worlds Smallest R Units will work Standard AM Transmitters other Makes Equip aircraft SUPER MICR~Ick Flite Pack inc ud MICRO Rx 54oz- gr MICRO Servos 47 oz-~ ce BATT 100 nelsCASH PRICE 22z~Thgr$14995 33oz962 gr18350 43 BBoz 1101 gr21695 Shipping $450 27 72 MHz other freqs $1000 Calif add Sales Tax Brochure 7& US $200 Foreign CASH DISCOUNT PRICES SHOWN Credit Cards 5% VISAMore 20% Deposit Req d f COD s nose gets too high tail waggles prototype vertical fin replaced larger swoopy-looking thing have learned stab wing blank out fin high angles tack produces fish tail about 50 side side everything under controL model isnt going drop wing snap-roll just waggles tail sassy sort wayand goes merry way Hurst Bowers upon learning models fish tailing wrote has built three different Luton Minors over years tail-waggle characteristic seems perfect example model duplicating idiosyn cracy full-sized aircraft cannot get model spin Throt tled way back dead-stick matter fully stalled aileron ele vator rudder can input just mushes off side drops nose repeats cycle model extremely stable Luton Minor size wing loading exceptionally easy model fly would nice RC trainers gentle Loops tend look like hen eggs Rolls Youve got kid ding Theonly roll doll can down runway So shes aerobatic glo riously cute air ground Placed half less throttle putts sputters around unbelievably slow speeds n delightful realistic manner long-term popularity Luton Minor sport fliers stems pure joy flying same holds true model Everyone flies Luton falls love must reason con stantly use feminine gender talking about means build yourself certain enjoy Radio Technique/Myers Continued paoe 39 lems have discussing past Better read last line again caught implication what youve read understand can tear up chart June 1983 column throw away Providing flying KPR-8FD receiver Nobody RC trans mitter likely get What about guy directly chan nel FM sets have property called Cap ture Ratio What means FM receiver tends keep listening its con trol transmitter until some another transmit ter same nearby frequency shows equal greater power capture ratio receiver pretty good ground bring another FM trans mitter same channel about half distance between control transmitter airplane before saw sign inter ference air tests did Bob Aberle flew plane front us swooping low pass about 10 ft altitude 20 ft out front us straight run about 500 ft beginning ending about 100 ft altitude stood about 20 ft behind him about 30 ft away direction plane going another Kraft FM transmitter same channel Bobs As started run turned transmitter ON planned keeping ready turn OFF instant saw sign interference plane came passed its way up out before got glitch repeated test three times sure what seeing would absolutely stupid put up two planes same frequency same time place test shows get lot protection effects guy might also flying channel some nearby field some test modules allowed us put up signals 10 20 30 40 kHz off Bobs channel RC52 might just well have left home effect also AM transmitters RC54 RC56 have poten tial produce detrimental third-order mix ing products talked about 3MPI June 1983 Radio Technique column almost waste time make test couldnt generate significant inter ference until stood both transmitters antennas fully extended right over airplane Incidentally going paging transmitter pumping out strong signal 72800 30 kHz Bobs RC52 checked monitor distance 500 ft park cars paging signal times stronger Bobs RC signal receiver designed built USA It will also available new Ham channels 5080-5098 MHz should very useful will need Amateur Technicians license fly AM FM anything Ham channels can use FM system new old 7273 MHz channels license whatsoever because noexamination CB license has elimi nated announced July AMA News page 105 ANOTHER RECEIVER Hold everything Just ready mail column Reston made acquaint ance Coulter Watt Whitestone NY Coulter has flying Ace Silver Seven-equipped Sagitta Syosset NY channel RC5O 72790 MHz having noticeable trouble monster 72800 Via Don Broggini learned after several weeks flying Coulter met first glitch low down far out about retune receiver offered retuning him could just assess present state tuning first arranged did found very little could improve factory tuning maybe 15% improvement SMASH SUCCESS TOLEDO! Thousands Already SOL D! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOOKS/EQUIPMENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM & Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order Consumers Guide Consumers Guide P0 Box 376 Greet FeiI VA 22066 Send SOSOllncludespoetegelhendfing3 Canadian Orders send $735 linciudes poe hand Oversees orders send $786 tincludes postlhendl MA September 1983 139 First Guide Devoted Exclusively R/C Aircraft

this ugly aps ne anon ugly ng qualities atever mo deling friends are a say Hell never pick subject isnt ugly enough Admittedly attraction such less-than-svelte aircraft Stitts Junior Farman David Baby Bomber Wittman Big X etc may perverse Nonetheless cer tainly enjoy seeing such ungainly ugly creatures fly beauti fully Luton Minor prototype near-perfect example perversity may ugly sin flies like angel fullA correlation d birds can b s ed strearr nearly well cousins As exams airworthiness o cock buzzard Development Luton Minor Scale modeling did begin us inspired Hurst Bowers smaller 15sized RC design January 1971 American Modeler turn outgrowth Free Flight Eric Fearnley December 1953 Aero Modeller Hurst also re sponsible delightful 020 single-channel RC Luton kit availeven flitted rom Fly Peanut published k morn derivatives version Luton differs longer oleo-strutte separated wing i horizontal stab ferent power could easily LA4a ii 30 Model Aviation tottering moiei characteristic ot pre-WW II British aircraft though relatively simple decorate Vinyl lettering obtained stom Pactra Poly-U paint used trimming Li ted LA1 i rdsee ho win foolboth construction imer-Nei ility viceless has lent economy ofrid operation andugli ness worldwide basis Luton Minor has d September more-enduring home-built design Yanks familiar Notice resemblance design Heath Parasol Les Longs Longster Pietenpol Air Scout have common lot wing area low available power course rather large model flies well such small engine years have admired Luton Minor old issue American Modeler has opened many times what really wanted develop elliptical-surfaced prototype good friend Johnnie Carrol Ireland hes fre quently judge Scale World Cham pionships came rescue vast collection reference material small three-view March 1937 issue English magazine Flight Coupled several photos G-AEPD gave us impetus start drawing Incidentally name Flight article Lively Lightweight appropriate model well Further inspiration came copy believe Walt Mooney brief text June 1958 Aero Modeller sent us article says Walt found Frank McNatty New Zealand has impossible completely eliminate dihedral 020 Free FIght Minor prototype would full size will shortly explain 32 Model Aviation bolt through flat section K&S brass soldered cabanes holds rear wing front retained section brass tubing slides ply grabber wingsimple works Landing gear two-piece torque bar-box unit adapted stock Sig gear Banner wheels used Removable hatch accesses tank bat tery OS 25 FSR Davis Diesel head Slimline muffler shown Fox 19B8 9-4 prop good choice br model author feels Cowl obtained Fiberglass Master Pilot figure must Low aspect ratio wing coupled long tail moment reminiscent Ed Heaths Parasol same era Balance Luton 30% wing chorda long way back since chord wide production version Luton Minor Irish registry now thought US Note enlarged fin squared-off stab particular airplane powered license-built Aeronca twin called JAP England Thanks Johnnle Carrol Ireland photo 6 F AILERON LINKAGE 10 SERVO IN WING CSEC11ON flAIVP -I NOW PUT C&IEL- I/4X 40 BOLT ThRU SIG SH 218 BLOCK ON 1/4 PLY BASE 1/16 SHEET C/S COVER TOPANO BOTTOM CS 1/4 SHEET BALSA I/B X 1/4 SPRUCE JOINER 1/4 X 3/8 BALSA SPARS I1/16 X 1/4 BALSA 3 LAMINATIONS 1/4 X 3/4 BALSA POSTS FOR FIN RS AND RUEOER 3/16 FOAM BOARD FILLE STAB AND RUDER 17 TILLER STRAP TO RUDDER I/BSO STRINGERS IN 1/8 BALSA FORMERS SPAR JOINER 1/4 PLY CABANE GRABBER WITh TUBE HOLE 3/32MWIRE FOR MAIN LIFT STRUTS ANCHOR INTO 3/8SQBLDCKS 1/16 MWIRE BRACES TO FIREWALL SCREWS FIBERGLAS COWL COAT HANGER THRU PLASTIC CLIPS 9X 6 PROP l/4PLY HATCH2 1/8 LITE PLY SIG 5H125LAM PLYFOR L3 MOUNT BLOCKSLIFT STRUTS 7/ DOUBLED I/eLITE PLY SIDES FROM 1 TO 3 3 BANNER WHEELS 8W-PH 0220N 5/32 M WIRE SIG RPM 231 SIG SH 132 BRACKET 1/450 BALSA LONGERONS 5/16 X 1/4 SIG TE STOCK 1/4 BALSA SPAR FILLER 1/4 50 REAR SPARS -fop AND BOTTOM 3/32 BALSA ALL RIBS I/16X 1/4 BALSA TIP 4 LAMINATIONS 5/BX 3/4 BALSA LE 1/450 TOP SPAR l/4X 3/8 BOWOM SPAR DUBRO 202 STEELSIRAPS INTO 3/8X LIFTSTRUT ENDS ITER 1 IVI L picture conjunction text shows get wing straight grabber centered fore-and-aft alignment struts determine horizontal plane stays jigged until epoxy has cured String running wing tail post check squareness simple model structure lightweight has much strength high-stress areas its needed structure blends traditional techniques modern ones E4 V NOTE RIG AILERQNS FOR LOTS OF UP LITTLE DOWN IBU PLY v07R BALSA W1ODBAkS2 I2 EACH TIP ALAMO OF 04IIC BALSA WING TIPS SCRAPTOP SPARRIB FILLER LWAINATCD7P1P LOCW0AOOLL SEAASWING TIP DETAILBOTTCM SPAR TO BLEND 1510 TIP BOA AND TILLCYD LO C I2CO V2 TRIANGLE STOCKJ I/IR MUAC WIRE 7 7 I41 030PLASTIC WINDSCREENABBE WILLIAM BROS RI 3/32 PLAXKINO GLASS COWL FROMIR 55 fIBERGLASS MASTERIa ORB tII LPAOE FROM TO OZ itl LOOP N ATTACR TOBII w - WrEB SCREWS- A8 SAtLASEA 1 REC I HAYESLAM PLY AL-OSRATER MOUNT COAT RANGER WIRE NON FUNCTIONAL STRUT LOOSE OOP AROGYC MAIN AXLEYII I/4PLY DES SHACK BUTYRATE CABLE CLAWS As far know first pub lished RC version Luton Minor LA4 prototype rather unusual model has pure delight us design build fly recommend builders pilots skill levels Construction Wire parts portion design frighten away prospective builder would probably cabane structure Therefore lets get started cabane pieces bent pairs 2-in music wire will bend rather easily large Vise-Grip plier bench vise used cutoff wheel motor tool also helpful Always discard misbent pieces rebending almost always un satisfactory Use drawing pattern develop half bend second match top right angles need bent parallel other bottom bends can left over-length Cut after installation through laminated ply sides Position two halves over drawing 34 Model Aviation -i novel method construction developed tail surfaces Foam-core board cut outline perimeter surfaced layers balsa strip glued Onto foam Hinge lines 3A6 x balsa No ribs other structure needed innovative system FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 XBLGNT SLIGHTLY VASOBALr -- 1fF LX ELYI8PLY TOP SPARF~-- GUSSET _ _ 3D C GRAINI ENTER-L---WING BALSA RBS f jfF GHTL DU WARDCENTER RIBS FROM SO AOLMASTER LEGS 3/3D tOTTOM NOTCH TOE ROT IFOR I/A PLY ThREADED REAR MARS- BLOCK -I IFFFFF3/SDBALSAFI[ FilSHrTf 5JPLAN Sb S/C 3/4 LEADING EDGE STOCK 7 LAM EL GUSSE SKORNF\ FOR S RUTS TOP VIEWAPLA 0KM 0 RAP2/ NFB A-BALSASCRAP BALSAVA INFLL 5HINGE VK ELY Al ERONS ARE U F- ~-ROM ASSEMBLED WNGK PLYGOLDBERG AC DAB COGELER UBRO DOD STEEL REAR STRUTSY PS EPOXY INTO 510 PRE-ORILLED Th KSR-RB =../ FRONT STRUTCENTER SECTION DETAILI/CAO BOLT UK ELY WING srRuTs010 3/B AILERON STOCK VA BALSA INPiLL TOP 3/32 BALSA OTTOM iRPER 0FORMERS[I FUSELAGETOP VIEW -7 3/IA FOAM BOARD L43X 6ASS 5OLOERLA3/R BALSABALSA TOFLYWITH5 F ThIS POINTDRILL UKHOLE FOR NYLON BOLTDEFLECTIONS 11-RUDDER 1-1/2 TOYAL TAREADEDSOLDERVIA BRAGSOLEVATOR TOTAL SHEET -o oo-W/BOTTOM LW ELY ELATE O BRAGS YORE3/3D MUSIC WIRE UK BALSAAILERKER 1/2 UPBALSA FLUSH I/4DO NYLONTLWOTTLE CABLEI/A SPRUCE BOLT7TO SUIT ENGINESELIT SIA3/IA FOAMJOINER BOARD BATTERYNYKODATREVA3/B BALSA CABLETO SliT SERVOS FlRUDDERS LAMINATIONS I/B SO SPRUCEFRONT VIEW BFRONT VIEW CI/IA I/H STRINUEUK LITE PLYUK LITE PLY 6EDSEOFCPEELED HINGESELEVATORSTAB / SCRAP BALSAVBS/B ET I/B ANY S BRACE IDA BALSABALSAI IPINNED LEAVE RAPffrHINGE __ METAL TILLER BA-HO BOLT AG SH-13D NOROR SLOTIALWTSEEL ER W UK VO CROSSBRACRET LONBERONS I/ASOPIECES SIDE VIEWLUTON S MINOR PRUTOTTEE ERG I/B USE5/32 MW OR MODIFYSILHOUETTE SCALE 215 NIPS DID RPM D31 ONITSPAN 56 ENORD Il-I/CMINOR rnNuIrr TED WSHAREA OBO SO PBLUTON WEIGHT BO 02 ELSPOWER 20-30 CU INSP"""DESIGNED S DRAWN BY DCC MATHEWS TRACING BY JOE DEMARCO 0 2 3 A5 K FROM MARCH IL IBSVKIIAWE LAM LY ELY EPOXY 7 LW BALSA using scrap balsa proper dimension separate Tape pin units exact alignment join sweatsoldering section 7/n-in brass tube over Use heat soldering iron long enough flow solder way through tubing Wash thoroughly dope thinner remove flux after sol dering rear cabanes fabricated much same manner except pre-drilled /4-in-dia section brass sheet K&S #246 excellent wrapped copper wire Sig SI-I 330 soldered wire stubs Mark bottom stubs onto ply fuse lage sides drill outside cabanes held against formers sides split sections Sig SH 125 bass wood trunion blocks possible error step would alter height September 1983 35 Left Pushrod anti-flex braces pieces scrap balsa strip CyA-glued around rods loose fit Right Cabane wires bent silver-soldered over plans Theyre epoxied fuselage sides within sections Sig grooved landing gear block picture shows alternate wing grabber front strut Its nose wheel bracket has drilled out can bolted wing place mid-line side Measure ac curately forward struts held firewall #4 sheet-metal screws running through loops bent wire can retained soldering onto brass tube wrapping soft copper wire should installed after finishing landing gear can modified Sig RP-BM-23 unit can made 5¼2-in music wire torque-wire unit type adequate absorb forces drag wire purely decoration bent section welding rod loops hold mains fire wall brackets plastic cable connectors found Radio Shack store Wing struts functional Pick out some hard pre-formed aileron stock brackets Du-Bro steel units bent shown epoxied saw-cut slots ends Although have held up exceptionally well small stubs /6-in dowel run holes would certainly wasted effort steel brackets should accurately positioned epoxied during rigging steps ends can contoured sanded after final positioning Tail surfaces several years have laminating tips over foam-core board patterns removing proj ect chose leave foam-core board place Although unorthodox idea has worked out very well Try yourself share excellent approach curved surfaces Heres carbon paper between plan foam-core board trace inside edge tail-surface outlines pencil Cut foam-core board traced shapes sharp modeling knife Use aliphatic resin Sig Bond etc glue hinge line strips soak /16 x a laminating strips am monia water bend around pe rimeter foam-core board Masking tape used hold laminations place remove tape slowly carefully once resin has set tendency paper covering foam-core board pull off tape Sand balsa outlines half-round contour represent tubing structure full-size airplane Thats Its quick strong inexpensive neat MonoKate FabriKote recom mendations covering dope form will attack damage foam avoid sags avoid pressing covering down anywhere other perimeter heat gun used judiciously best shrinking covering Wing Standard construction used throughout ailerons cut faced after wing panel laid down Tips laminated around foam-core board form much like tail surfaces edge board faced Sig /4-in Stripe-Rite tape prevent adhering laminate form laminate course removed 36 Model Aviation Laminate wing tips around form cut foam-core board Soak balsa ammonia water easy bending use aliphatic resin glue protect form wing Only SO glue will stick Struts attach Du-Bro metal strips sheet metal screws 9O aileron horns tilted slightly give up down helps avoid aileron-induced yaw study of pictures well plan Hank Clarks cutaway will make construction much easier Docs got different engine pointa K&B 35 Davis Diesel conversion after drying overnight Dihedral gussets custom cut fit saw cuts made flush against spar faces threaded block mounted ap propriate cut-out joined center ribs ply sheet place / ply grabber trial-fitted epoxied un til rigging step aileron linkage should setup differential throws angling 900 bellcranks positioning horns used Goldberg AC 246 connectors Du-Bro 183 hardware simple wire stub would work just well Planking other ply floor should left off until jigging step has com pleted allows use clothespins and/or clamps hold center section adjusting Fuselage Construction classical way Two identical sides joined bulkheads crosspieces form box Three bulkheads interlock laminated ply sides tail post pulled together joined over top view drawing laminated ply two layers Lite Ply pop lar joined thin layer 5-mm epoxy weighted flat surface Cabane wires should installed prior putting turtle-deck nose sheeting sheeting can cut clear wire joined sides pulled down onto x strip Glue thin beads thick CyA turtle-deck stringers place trim off projections formers between avoid starved horse look Build up land scrap balsa around wire tail-wheel bracket screwed onto ply base tiller arm held rudder strip sheet metal run under either side horn As alternative skid wire would scalelike would work satisfactorily cowl held firewall small sections basswood #4 sheet metal screws Openings must made cowl choking air passage around shaft out around head muffler fiberglass unit has sufficient strength re main usable after large chunks cut away Sufficient room available mounting engine sideways upright inverted Warning long tail short nose moments Luton Minor require careful attention weight distribution 500 mAh battery pack used model weight needed As rule feel have done good job engineering design requires no ballast just no way Luton Flown initially dieselised Davis K&B 35 dieselised OS 25 FSR model needed /2 oz Sig 562 weight screwed firewall face lighter much easier muffle cowl Fox 19 BB needed full 3 oz Fox 1 9BB muffler clears sides need trickery very satisfactory Continued page 138 FOX INTRODUCES THE NEW COMPACT 40 RC WEIGHT9 oz Bore840 Stroke715 RPM 10-6 prop13000 24099 Compact 40 RC $5995 90236 Tilt-Up Muffler 1495 90237 Tilt-Down Muffler 1495 FOX MANUFACTURING CO 5305 TOWSOH AVE fORT SMITH ARK 72501 Hot Line 15011 646-1651 Youre wondering offering new 40 existing 4088 powerful rugged 40 market Well unfortunately massive construction 40B8 makes too large fit planes calling 40s answer new Compact 40 gives outstanding performance Fox lighter compact frame model interchangeable K&B OS HB Enya performs excellently no-nitro fuel superb idle transition recommend new Compact 40 size weight factors larger frame 4088 super-durability desired September 1983 37 $895 New Specials $795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send $50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carrollton Tx 75011-5010 6156 t45 Ait Colors stern Fronf I find regular issue SAM 35 Speaks editors name David Baker 22 Ellington Rd Muswell Hill London NlO 3DG England long-hand slip sample says American modelers may obtain copy $700 Perhaps youll want inquire first perse vere Stop must Bill Winter 4426 Altura Ct Fairfax VA 22030 Two-Meter/Jolly Continued page 28 Mike Regans model could des cribed typical Valley competition Sailplane features fiberglass fuse lage incredibly strong wing foam spruce balsa construction Mike Bame 15% airfoilalways good taste familiar current F3B scene coun try will recognize similarity Alex Bowers Tai Tai special interest Mikes model has conventional polyhe dral geometry leads wonder ailerons really necessary high-speed Sailplane Close Regans heels another SFVSF member Mike Bame fin ished second Mike flew aileroned version Sailplane flown Regan Mike Bame very innovative modeler responsible developing materials techniques used fellow club members Speaking SFVSF no sur prise see its members claim five six top places clubs total com mitment advancing Sailplane tech nology has given members both models experience necessary well multi-task contest cause great depth talent SFVSF can muster members club will certainly strong force contend long choose compete effort away winch advantage SFVSF construc ted six identical winches use contest course gave contestants equal chance good launch memories have contest sticks mind good times generated meet Everyone came have good time did fact have good time anyone didnt should perhaps think about compete hobby/sport Personally enjoy multi-task Soaring other phase RC Sail plane flying concept TwoMeter World Cup allows others like myself enjoy thrill chal lenge closed-course racing something possible more-usual Sailplane gatherings members Modesto RC Club SFVSF particularly Mr Hanson congratulations job well done looking forward Fifth Two-Meter World Cup See Luton Minor/Mathews Continued page 37 turning 9 X 6 prop Idle marvelously slow reliable mid-range excellent adjustments breeze Rigging photos illustrates technique Start nylon bolt threaded block Measure block up both wings exactly same height off board wing bolt screwed Run string tail post exactly same point both wing panels keep adjusting fore aft position grabber loosen ing clothespins until exactly dimension determines left right thrust must zero-zero Once wing panels equal dihedral left-right grabber epoxied clamped against wing structure Avoid later necessity raising lowering wing incidence carefully measuring against flat fuselage top time After epoxy has cured unit still jigged glue steel straps strut slots 5-mm epoxy ends should screwed pre-drilled holes Rigging difficult complex However requires patience care dont hurry Covering Finishing has Mono Kote wing tail surfaces Sig Koverall fuselage Koverall heat-sealed over Coverite Balsarite heat-shrunk Three coats clear nitrate dope followed two sprayed coats Pactra Poly-U fuselage wing leading edge trim Poly U Numbers EZ-Stik vinyl6 wing 4 fuselage pilot figure Williams Bros 2i-in standard unit painted paint plastic models Banner wheels go nicely model Flying Ground handling takeoff roll must seen believed thing gets up its mains will run straight down runway mile Apparently lowto-the-ground fuselage high-up-in-theair wing combine produce truly extra ordinary handling Luton Minor doesnt need rudder stabbing steerable tail wheel get going straight down runway Just point direction want advance throttle other hand tracks darn well difficult turn around taxiing cares climb-out function wing engine intended climb prop rather uses speed climb wing steep pull-up such clear deck portion touch-and-go pre pared witness strange phenomenon 138 Model Aviation Power Soar New Heights self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 LT-50 Electric Motor 01 Cu equivelent gas engine displacement / CANNON SYSTEMS 13400-26 Saticoy Str.t North Hollywood Calif 91605 PIoo 2131764-1488 SUPER-MICRO FLITE PACKS Worlds Smallest R Units will work Standard AM Transmitters other Makes Equip aircraft SUPER MICR~Ick Flite Pack inc ud MICRO Rx 54oz- gr MICRO Servos 47 oz-~ ce BATT 100 nelsCASH PRICE 22z~Thgr$14995 33oz962 gr18350 43 BBoz 1101 gr21695 Shipping $450 27 72 MHz other freqs $1000 Calif add Sales Tax Brochure 7& US $200 Foreign CASH DISCOUNT PRICES SHOWN Credit Cards 5% VISAMore 20% Deposit Req d f COD s nose gets too high tail waggles prototype vertical fin replaced larger swoopy-looking thing have learned stab wing blank out fin high angles tack produces fish tail about 50 side side everything under controL model isnt going drop wing snap-roll just waggles tail sassy sort wayand goes merry way Hurst Bowers upon learning models fish tailing wrote has built three different Luton Minors over years tail-waggle characteristic seems perfect example model duplicating idiosyn cracy full-sized aircraft cannot get model spin Throt tled way back dead-stick matter fully stalled aileron ele vator rudder can input just mushes off side drops nose repeats cycle model extremely stable Luton Minor size wing loading exceptionally easy model fly would nice RC trainers gentle Loops tend look like hen eggs Rolls Youve got kid ding Theonly roll doll can down runway So shes aerobatic glo riously cute air ground Placed half less throttle putts sputters around unbelievably slow speeds n delightful realistic manner long-term popularity Luton Minor sport fliers stems pure joy flying same holds true model Everyone flies Luton falls love must reason con stantly use feminine gender talking about means build yourself certain enjoy Radio Technique/Myers Continued paoe 39 lems have discussing past Better read last line again caught implication what youve read understand can tear up chart June 1983 column throw away Providing flying KPR-8FD receiver Nobody RC trans mitter likely get What about guy directly chan nel FM sets have property called Cap ture Ratio What means FM receiver tends keep listening its con trol transmitter until some another transmit ter same nearby frequency shows equal greater power capture ratio receiver pretty good ground bring another FM trans mitter same channel about half distance between control transmitter airplane before saw sign inter ference air tests did Bob Aberle flew plane front us swooping low pass about 10 ft altitude 20 ft out front us straight run about 500 ft beginning ending about 100 ft altitude stood about 20 ft behind him about 30 ft away direction plane going another Kraft FM transmitter same channel Bobs As started run turned transmitter ON planned keeping ready turn OFF instant saw sign interference plane came passed its way up out before got glitch repeated test three times sure what seeing would absolutely stupid put up two planes same frequency same time place test shows get lot protection effects guy might also flying channel some nearby field some test modules allowed us put up signals 10 20 30 40 kHz off Bobs channel RC52 might just well have left home effect also AM transmitters RC54 RC56 have poten tial produce detrimental third-order mix ing products talked about 3MPI June 1983 Radio Technique column almost waste time make test couldnt generate significant inter ference until stood both transmitters antennas fully extended right over airplane Incidentally going paging transmitter pumping out strong signal 72800 30 kHz Bobs RC52 checked monitor distance 500 ft park cars paging signal times stronger Bobs RC signal receiver designed built USA It will also available new Ham channels 5080-5098 MHz should very useful will need Amateur Technicians license fly AM FM anything Ham channels can use FM system new old 7273 MHz channels license whatsoever because noexamination CB license has elimi nated announced July AMA News page 105 ANOTHER RECEIVER Hold everything Just ready mail column Reston made acquaint ance Coulter Watt Whitestone NY Coulter has flying Ace Silver Seven-equipped Sagitta Syosset NY channel RC5O 72790 MHz having noticeable trouble monster 72800 Via Don Broggini learned after several weeks flying Coulter met first glitch low down far out about retune receiver offered retuning him could just assess present state tuning first arranged did found very little could improve factory tuning maybe 15% improvement SMASH SUCCESS TOLEDO! Thousands Already SOL D! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOOKS/EQUIPMENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM & Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order Consumers Guide Consumers Guide P0 Box 376 Greet FeiI VA 22066 Send SOSOllncludespoetegelhendfing3 Canadian Orders send $735 linciudes poe hand Oversees orders send $786 tincludes postlhendl MA September 1983 139 First Guide Devoted Exclusively R/C Aircraft

this ugly aps ne anon ugly ng qualities atever mo deling friends are a say Hell never pick subject isnt ugly enough Admittedly attraction such less-than-svelte aircraft Stitts Junior Farman David Baby Bomber Wittman Big X etc may perverse Nonetheless cer tainly enjoy seeing such ungainly ugly creatures fly beauti fully Luton Minor prototype near-perfect example perversity may ugly sin flies like angel fullA correlation d birds can b s ed strearr nearly well cousins As exams airworthiness o cock buzzard Development Luton Minor Scale modeling did begin us inspired Hurst Bowers smaller 15sized RC design January 1971 American Modeler turn outgrowth Free Flight Eric Fearnley December 1953 Aero Modeller Hurst also re sponsible delightful 020 single-channel RC Luton kit availeven flitted rom Fly Peanut published k morn derivatives version Luton differs longer oleo-strutte separated wing i horizontal stab ferent power could easily LA4a ii 30 Model Aviation tottering moiei characteristic ot pre-WW II British aircraft though relatively simple decorate Vinyl lettering obtained stom Pactra Poly-U paint used trimming Li ted LA1 i rdsee ho win foolboth construction imer-Nei ility viceless has lent economy ofrid operation andugli ness worldwide basis Luton Minor has d September more-enduring home-built design Yanks familiar Notice resemblance design Heath Parasol Les Longs Longster Pietenpol Air Scout have common lot wing area low available power course rather large model flies well such small engine years have admired Luton Minor old issue American Modeler has opened many times what really wanted develop elliptical-surfaced prototype good friend Johnnie Carrol Ireland hes fre quently judge Scale World Cham pionships came rescue vast collection reference material small three-view March 1937 issue English magazine Flight Coupled several photos G-AEPD gave us impetus start drawing Incidentally name Flight article Lively Lightweight appropriate model well Further inspiration came copy believe Walt Mooney brief text June 1958 Aero Modeller sent us article says Walt found Frank McNatty New Zealand has impossible completely eliminate dihedral 020 Free FIght Minor prototype would full size will shortly explain 32 Model Aviation bolt through flat section K&S brass soldered cabanes holds rear wing front retained section brass tubing slides ply grabber wingsimple works Landing gear two-piece torque bar-box unit adapted stock Sig gear Banner wheels used Removable hatch accesses tank bat tery OS 25 FSR Davis Diesel head Slimline muffler shown Fox 19B8 9-4 prop good choice br model author feels Cowl obtained Fiberglass Master Pilot figure must Low aspect ratio wing coupled long tail moment reminiscent Ed Heaths Parasol same era Balance Luton 30% wing chorda long way back since chord wide production version Luton Minor Irish registry now thought US Note enlarged fin squared-off stab particular airplane powered license-built Aeronca twin called JAP England Thanks Johnnle Carrol Ireland photo 6 F AILERON LINKAGE 10 SERVO IN WING CSEC11ON flAIVP -I NOW PUT C&IEL- I/4X 40 BOLT ThRU SIG SH 218 BLOCK ON 1/4 PLY BASE 1/16 SHEET C/S COVER TOPANO BOTTOM CS 1/4 SHEET BALSA I/B X 1/4 SPRUCE JOINER 1/4 X 3/8 BALSA SPARS I1/16 X 1/4 BALSA 3 LAMINATIONS 1/4 X 3/4 BALSA POSTS FOR FIN RS AND RUEOER 3/16 FOAM BOARD FILLE STAB AND RUDER 17 TILLER STRAP TO RUDDER I/BSO STRINGERS IN 1/8 BALSA FORMERS SPAR JOINER 1/4 PLY CABANE GRABBER WITh TUBE HOLE 3/32MWIRE FOR MAIN LIFT STRUTS ANCHOR INTO 3/8SQBLDCKS 1/16 MWIRE BRACES TO FIREWALL SCREWS FIBERGLAS COWL COAT HANGER THRU PLASTIC CLIPS 9X 6 PROP l/4PLY HATCH2 1/8 LITE PLY SIG 5H125LAM PLYFOR L3 MOUNT BLOCKSLIFT STRUTS 7/ DOUBLED I/eLITE PLY SIDES FROM 1 TO 3 3 BANNER WHEELS 8W-PH 0220N 5/32 M WIRE SIG RPM 231 SIG SH 132 BRACKET 1/450 BALSA LONGERONS 5/16 X 1/4 SIG TE STOCK 1/4 BALSA SPAR FILLER 1/4 50 REAR SPARS -fop AND BOTTOM 3/32 BALSA ALL RIBS I/16X 1/4 BALSA TIP 4 LAMINATIONS 5/BX 3/4 BALSA LE 1/450 TOP SPAR l/4X 3/8 BOWOM SPAR DUBRO 202 STEELSIRAPS INTO 3/8X LIFTSTRUT ENDS ITER 1 IVI L picture conjunction text shows get wing straight grabber centered fore-and-aft alignment struts determine horizontal plane stays jigged until epoxy has cured String running wing tail post check squareness simple model structure lightweight has much strength high-stress areas its needed structure blends traditional techniques modern ones E4 V NOTE RIG AILERQNS FOR LOTS OF UP LITTLE DOWN IBU PLY v07R BALSA W1ODBAkS2 I2 EACH TIP ALAMO OF 04IIC BALSA WING TIPS SCRAPTOP SPARRIB FILLER LWAINATCD7P1P LOCW0AOOLL SEAASWING TIP DETAILBOTTCM SPAR TO BLEND 1510 TIP BOA AND TILLCYD LO C I2CO V2 TRIANGLE STOCKJ I/IR MUAC WIRE 7 7 I41 030PLASTIC WINDSCREENABBE WILLIAM BROS RI 3/32 PLAXKINO GLASS COWL FROMIR 55 fIBERGLASS MASTERIa ORB tII LPAOE FROM TO OZ itl LOOP N ATTACR TOBII w - WrEB SCREWS- A8 SAtLASEA 1 REC I HAYESLAM PLY AL-OSRATER MOUNT COAT RANGER WIRE NON FUNCTIONAL STRUT LOOSE OOP AROGYC MAIN AXLEYII I/4PLY DES SHACK BUTYRATE CABLE CLAWS As far know first pub lished RC version Luton Minor LA4 prototype rather unusual model has pure delight us design build fly recommend builders pilots skill levels Construction Wire parts portion design frighten away prospective builder would probably cabane structure Therefore lets get started cabane pieces bent pairs 2-in music wire will bend rather easily large Vise-Grip plier bench vise used cutoff wheel motor tool also helpful Always discard misbent pieces rebending almost always un satisfactory Use drawing pattern develop half bend second match top right angles need bent parallel other bottom bends can left over-length Cut after installation through laminated ply sides Position two halves over drawing 34 Model Aviation -i novel method construction developed tail surfaces Foam-core board cut outline perimeter surfaced layers balsa strip glued Onto foam Hinge lines 3A6 x balsa No ribs other structure needed innovative system FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 XBLGNT SLIGHTLY VASOBALr -- 1fF LX ELYI8PLY TOP SPARF~-- GUSSET _ _ 3D C GRAINI ENTER-L---WING BALSA RBS f jfF GHTL DU WARDCENTER RIBS FROM SO AOLMASTER LEGS 3/3D tOTTOM NOTCH TOE ROT IFOR I/A PLY ThREADED REAR MARS- BLOCK -I IFFFFF3/SDBALSAFI[ FilSHrTf 5JPLAN Sb S/C 3/4 LEADING EDGE STOCK 7 LAM EL GUSSE SKORNF\ FOR S RUTS TOP VIEWAPLA 0KM 0 RAP2/ NFB A-BALSASCRAP BALSAVA INFLL 5HINGE VK ELY Al ERONS ARE U F- ~-ROM ASSEMBLED WNGK PLYGOLDBERG AC DAB COGELER UBRO DOD STEEL REAR STRUTSY PS EPOXY INTO 510 PRE-ORILLED Th KSR-RB =../ FRONT STRUTCENTER SECTION DETAILI/CAO BOLT UK ELY WING srRuTs010 3/B AILERON STOCK VA BALSA INPiLL TOP 3/32 BALSA OTTOM iRPER 0FORMERS[I FUSELAGETOP VIEW -7 3/IA FOAM BOARD L43X 6ASS 5OLOERLA3/R BALSABALSA TOFLYWITH5 F ThIS POINTDRILL UKHOLE FOR NYLON BOLTDEFLECTIONS 11-RUDDER 1-1/2 TOYAL TAREADEDSOLDERVIA BRAGSOLEVATOR TOTAL SHEET -o oo-W/BOTTOM LW ELY ELATE O BRAGS YORE3/3D MUSIC WIRE UK BALSAAILERKER 1/2 UPBALSA FLUSH I/4DO NYLONTLWOTTLE CABLEI/A SPRUCE BOLT7TO SUIT ENGINESELIT SIA3/IA FOAMJOINER BOARD BATTERYNYKODATREVA3/B BALSA CABLETO SliT SERVOS FlRUDDERS LAMINATIONS I/B SO SPRUCEFRONT VIEW BFRONT VIEW CI/IA I/H STRINUEUK LITE PLYUK LITE PLY 6EDSEOFCPEELED HINGESELEVATORSTAB / SCRAP BALSAVBS/B ET I/B ANY S BRACE IDA BALSABALSAI IPINNED LEAVE RAPffrHINGE __ METAL TILLER BA-HO BOLT AG SH-13D NOROR SLOTIALWTSEEL ER W UK VO CROSSBRACRET LONBERONS I/ASOPIECES SIDE VIEWLUTON S MINOR PRUTOTTEE ERG I/B USE5/32 MW OR MODIFYSILHOUETTE SCALE 215 NIPS DID RPM D31 ONITSPAN 56 ENORD Il-I/CMINOR rnNuIrr TED WSHAREA OBO SO PBLUTON WEIGHT BO 02 ELSPOWER 20-30 CU INSP"""DESIGNED S DRAWN BY DCC MATHEWS TRACING BY JOE DEMARCO 0 2 3 A5 K FROM MARCH IL IBSVKIIAWE LAM LY ELY EPOXY 7 LW BALSA using scrap balsa proper dimension separate Tape pin units exact alignment join sweatsoldering section 7/n-in brass tube over Use heat soldering iron long enough flow solder way through tubing Wash thoroughly dope thinner remove flux after sol dering rear cabanes fabricated much same manner except pre-drilled /4-in-dia section brass sheet K&S #246 excellent wrapped copper wire Sig SI-I 330 soldered wire stubs Mark bottom stubs onto ply fuse lage sides drill outside cabanes held against formers sides split sections Sig SH 125 bass wood trunion blocks possible error step would alter height September 1983 35 Left Pushrod anti-flex braces pieces scrap balsa strip CyA-glued around rods loose fit Right Cabane wires bent silver-soldered over plans Theyre epoxied fuselage sides within sections Sig grooved landing gear block picture shows alternate wing grabber front strut Its nose wheel bracket has drilled out can bolted wing place mid-line side Measure ac curately forward struts held firewall #4 sheet-metal screws running through loops bent wire can retained soldering onto brass tube wrapping soft copper wire should installed after finishing landing gear can modified Sig RP-BM-23 unit can made 5¼2-in music wire torque-wire unit type adequate absorb forces drag wire purely decoration bent section welding rod loops hold mains fire wall brackets plastic cable connectors found Radio Shack store Wing struts functional Pick out some hard pre-formed aileron stock brackets Du-Bro steel units bent shown epoxied saw-cut slots ends Although have held up exceptionally well small stubs /6-in dowel run holes would certainly wasted effort steel brackets should accurately positioned epoxied during rigging steps ends can contoured sanded after final positioning Tail surfaces several years have laminating tips over foam-core board patterns removing proj ect chose leave foam-core board place Although unorthodox idea has worked out very well Try yourself share excellent approach curved surfaces Heres carbon paper between plan foam-core board trace inside edge tail-surface outlines pencil Cut foam-core board traced shapes sharp modeling knife Use aliphatic resin Sig Bond etc glue hinge line strips soak /16 x a laminating strips am monia water bend around pe rimeter foam-core board Masking tape used hold laminations place remove tape slowly carefully once resin has set tendency paper covering foam-core board pull off tape Sand balsa outlines half-round contour represent tubing structure full-size airplane Thats Its quick strong inexpensive neat MonoKate FabriKote recom mendations covering dope form will attack damage foam avoid sags avoid pressing covering down anywhere other perimeter heat gun used judiciously best shrinking covering Wing Standard construction used throughout ailerons cut faced after wing panel laid down Tips laminated around foam-core board form much like tail surfaces edge board faced Sig /4-in Stripe-Rite tape prevent adhering laminate form laminate course removed 36 Model Aviation Laminate wing tips around form cut foam-core board Soak balsa ammonia water easy bending use aliphatic resin glue protect form wing Only SO glue will stick Struts attach Du-Bro metal strips sheet metal screws 9O aileron horns tilted slightly give up down helps avoid aileron-induced yaw study of pictures well plan Hank Clarks cutaway will make construction much easier Docs got different engine pointa K&B 35 Davis Diesel conversion after drying overnight Dihedral gussets custom cut fit saw cuts made flush against spar faces threaded block mounted ap propriate cut-out joined center ribs ply sheet place / ply grabber trial-fitted epoxied un til rigging step aileron linkage should setup differential throws angling 900 bellcranks positioning horns used Goldberg AC 246 connectors Du-Bro 183 hardware simple wire stub would work just well Planking other ply floor should left off until jigging step has com pleted allows use clothespins and/or clamps hold center section adjusting Fuselage Construction classical way Two identical sides joined bulkheads crosspieces form box Three bulkheads interlock laminated ply sides tail post pulled together joined over top view drawing laminated ply two layers Lite Ply pop lar joined thin layer 5-mm epoxy weighted flat surface Cabane wires should installed prior putting turtle-deck nose sheeting sheeting can cut clear wire joined sides pulled down onto x strip Glue thin beads thick CyA turtle-deck stringers place trim off projections formers between avoid starved horse look Build up land scrap balsa around wire tail-wheel bracket screwed onto ply base tiller arm held rudder strip sheet metal run under either side horn As alternative skid wire would scalelike would work satisfactorily cowl held firewall small sections basswood #4 sheet metal screws Openings must made cowl choking air passage around shaft out around head muffler fiberglass unit has sufficient strength re main usable after large chunks cut away Sufficient room available mounting engine sideways upright inverted Warning long tail short nose moments Luton Minor require careful attention weight distribution 500 mAh battery pack used model weight needed As rule feel have done good job engineering design requires no ballast just no way Luton Flown initially dieselised Davis K&B 35 dieselised OS 25 FSR model needed /2 oz Sig 562 weight screwed firewall face lighter much easier muffle cowl Fox 19 BB needed full 3 oz Fox 1 9BB muffler clears sides need trickery very satisfactory Continued page 138 FOX INTRODUCES THE NEW COMPACT 40 RC WEIGHT9 oz Bore840 Stroke715 RPM 10-6 prop13000 24099 Compact 40 RC $5995 90236 Tilt-Up Muffler 1495 90237 Tilt-Down Muffler 1495 FOX MANUFACTURING CO 5305 TOWSOH AVE fORT SMITH ARK 72501 Hot Line 15011 646-1651 Youre wondering offering new 40 existing 4088 powerful rugged 40 market Well unfortunately massive construction 40B8 makes too large fit planes calling 40s answer new Compact 40 gives outstanding performance Fox lighter compact frame model interchangeable K&B OS HB Enya performs excellently no-nitro fuel superb idle transition recommend new Compact 40 size weight factors larger frame 4088 super-durability desired September 1983 37 $895 New Specials $795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send $50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carrollton Tx 75011-5010 6156 t45 Ait Colors stern Fronf I find regular issue SAM 35 Speaks editors name David Baker 22 Ellington Rd Muswell Hill London NlO 3DG England long-hand slip sample says American modelers may obtain copy $700 Perhaps youll want inquire first perse vere Stop must Bill Winter 4426 Altura Ct Fairfax VA 22030 Two-Meter/Jolly Continued page 28 Mike Regans model could des cribed typical Valley competition Sailplane features fiberglass fuse lage incredibly strong wing foam spruce balsa construction Mike Bame 15% airfoilalways good taste familiar current F3B scene coun try will recognize similarity Alex Bowers Tai Tai special interest Mikes model has conventional polyhe dral geometry leads wonder ailerons really necessary high-speed Sailplane Close Regans heels another SFVSF member Mike Bame fin ished second Mike flew aileroned version Sailplane flown Regan Mike Bame very innovative modeler responsible developing materials techniques used fellow club members Speaking SFVSF no sur prise see its members claim five six top places clubs total com mitment advancing Sailplane tech nology has given members both models experience necessary well multi-task contest cause great depth talent SFVSF can muster members club will certainly strong force contend long choose compete effort away winch advantage SFVSF construc ted six identical winches use contest course gave contestants equal chance good launch memories have contest sticks mind good times generated meet Everyone came have good time did fact have good time anyone didnt should perhaps think about compete hobby/sport Personally enjoy multi-task Soaring other phase RC Sail plane flying concept TwoMeter World Cup allows others like myself enjoy thrill chal lenge closed-course racing something possible more-usual Sailplane gatherings members Modesto RC Club SFVSF particularly Mr Hanson congratulations job well done looking forward Fifth Two-Meter World Cup See Luton Minor/Mathews Continued page 37 turning 9 X 6 prop Idle marvelously slow reliable mid-range excellent adjustments breeze Rigging photos illustrates technique Start nylon bolt threaded block Measure block up both wings exactly same height off board wing bolt screwed Run string tail post exactly same point both wing panels keep adjusting fore aft position grabber loosen ing clothespins until exactly dimension determines left right thrust must zero-zero Once wing panels equal dihedral left-right grabber epoxied clamped against wing structure Avoid later necessity raising lowering wing incidence carefully measuring against flat fuselage top time After epoxy has cured unit still jigged glue steel straps strut slots 5-mm epoxy ends should screwed pre-drilled holes Rigging difficult complex However requires patience care dont hurry Covering Finishing has Mono Kote wing tail surfaces Sig Koverall fuselage Koverall heat-sealed over Coverite Balsarite heat-shrunk Three coats clear nitrate dope followed two sprayed coats Pactra Poly-U fuselage wing leading edge trim Poly U Numbers EZ-Stik vinyl6 wing 4 fuselage pilot figure Williams Bros 2i-in standard unit painted paint plastic models Banner wheels go nicely model Flying Ground handling takeoff roll must seen believed thing gets up its mains will run straight down runway mile Apparently lowto-the-ground fuselage high-up-in-theair wing combine produce truly extra ordinary handling Luton Minor doesnt need rudder stabbing steerable tail wheel get going straight down runway Just point direction want advance throttle other hand tracks darn well difficult turn around taxiing cares climb-out function wing engine intended climb prop rather uses speed climb wing steep pull-up such clear deck portion touch-and-go pre pared witness strange phenomenon 138 Model Aviation Power Soar New Heights self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 LT-50 Electric Motor 01 Cu equivelent gas engine displacement / CANNON SYSTEMS 13400-26 Saticoy Str.t North Hollywood Calif 91605 PIoo 2131764-1488 SUPER-MICRO FLITE PACKS Worlds Smallest R Units will work Standard AM Transmitters other Makes Equip aircraft SUPER MICR~Ick Flite Pack inc ud MICRO Rx 54oz- gr MICRO Servos 47 oz-~ ce BATT 100 nelsCASH PRICE 22z~Thgr$14995 33oz962 gr18350 43 BBoz 1101 gr21695 Shipping $450 27 72 MHz other freqs $1000 Calif add Sales Tax Brochure 7& US $200 Foreign CASH DISCOUNT PRICES SHOWN Credit Cards 5% VISAMore 20% Deposit Req d f COD s nose gets too high tail waggles prototype vertical fin replaced larger swoopy-looking thing have learned stab wing blank out fin high angles tack produces fish tail about 50 side side everything under controL model isnt going drop wing snap-roll just waggles tail sassy sort wayand goes merry way Hurst Bowers upon learning models fish tailing wrote has built three different Luton Minors over years tail-waggle characteristic seems perfect example model duplicating idiosyn cracy full-sized aircraft cannot get model spin Throt tled way back dead-stick matter fully stalled aileron ele vator rudder can input just mushes off side drops nose repeats cycle model extremely stable Luton Minor size wing loading exceptionally easy model fly would nice RC trainers gentle Loops tend look like hen eggs Rolls Youve got kid ding Theonly roll doll can down runway So shes aerobatic glo riously cute air ground Placed half less throttle putts sputters around unbelievably slow speeds n delightful realistic manner long-term popularity Luton Minor sport fliers stems pure joy flying same holds true model Everyone flies Luton falls love must reason con stantly use feminine gender talking about means build yourself certain enjoy Radio Technique/Myers Continued paoe 39 lems have discussing past Better read last line again caught implication what youve read understand can tear up chart June 1983 column throw away Providing flying KPR-8FD receiver Nobody RC trans mitter likely get What about guy directly chan nel FM sets have property called Cap ture Ratio What means FM receiver tends keep listening its con trol transmitter until some another transmit ter same nearby frequency shows equal greater power capture ratio receiver pretty good ground bring another FM trans mitter same channel about half distance between control transmitter airplane before saw sign inter ference air tests did Bob Aberle flew plane front us swooping low pass about 10 ft altitude 20 ft out front us straight run about 500 ft beginning ending about 100 ft altitude stood about 20 ft behind him about 30 ft away direction plane going another Kraft FM transmitter same channel Bobs As started run turned transmitter ON planned keeping ready turn OFF instant saw sign interference plane came passed its way up out before got glitch repeated test three times sure what seeing would absolutely stupid put up two planes same frequency same time place test shows get lot protection effects guy might also flying channel some nearby field some test modules allowed us put up signals 10 20 30 40 kHz off Bobs channel RC52 might just well have left home effect also AM transmitters RC54 RC56 have poten tial produce detrimental third-order mix ing products talked about 3MPI June 1983 Radio Technique column almost waste time make test couldnt generate significant inter ference until stood both transmitters antennas fully extended right over airplane Incidentally going paging transmitter pumping out strong signal 72800 30 kHz Bobs RC52 checked monitor distance 500 ft park cars paging signal times stronger Bobs RC signal receiver designed built USA It will also available new Ham channels 5080-5098 MHz should very useful will need Amateur Technicians license fly AM FM anything Ham channels can use FM system new old 7273 MHz channels license whatsoever because noexamination CB license has elimi nated announced July AMA News page 105 ANOTHER RECEIVER Hold everything Just ready mail column Reston made acquaint ance Coulter Watt Whitestone NY Coulter has flying Ace Silver Seven-equipped Sagitta Syosset NY channel RC5O 72790 MHz having noticeable trouble monster 72800 Via Don Broggini learned after several weeks flying Coulter met first glitch low down far out about retune receiver offered retuning him could just assess present state tuning first arranged did found very little could improve factory tuning maybe 15% improvement SMASH SUCCESS TOLEDO! Thousands Already SOL D! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOOKS/EQUIPMENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM & Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order Consumers Guide Consumers Guide P0 Box 376 Greet FeiI VA 22066 Send SOSOllncludespoetegelhendfing3 Canadian Orders send $735 linciudes poe hand Oversees orders send $786 tincludes postlhendl MA September 1983 139 First Guide Devoted Exclusively R/C Aircraft

this ugly aps ne anon ugly ng qualities atever mo deling friends are a say Hell never pick subject isnt ugly enough Admittedly attraction such less-than-svelte aircraft Stitts Junior Farman David Baby Bomber Wittman Big X etc may perverse Nonetheless cer tainly enjoy seeing such ungainly ugly creatures fly beauti fully Luton Minor prototype near-perfect example perversity may ugly sin flies like angel fullA correlation d birds can b s ed strearr nearly well cousins As exams airworthiness o cock buzzard Development Luton Minor Scale modeling did begin us inspired Hurst Bowers smaller 15sized RC design January 1971 American Modeler turn outgrowth Free Flight Eric Fearnley December 1953 Aero Modeller Hurst also re sponsible delightful 020 single-channel RC Luton kit availeven flitted rom Fly Peanut published k morn derivatives version Luton differs longer oleo-strutte separated wing i horizontal stab ferent power could easily LA4a ii 30 Model Aviation tottering moiei characteristic ot pre-WW II British aircraft though relatively simple decorate Vinyl lettering obtained stom Pactra Poly-U paint used trimming Li ted LA1 i rdsee ho win foolboth construction imer-Nei ility viceless has lent economy ofrid operation andugli ness worldwide basis Luton Minor has d September more-enduring home-built design Yanks familiar Notice resemblance design Heath Parasol Les Longs Longster Pietenpol Air Scout have common lot wing area low available power course rather large model flies well such small engine years have admired Luton Minor old issue American Modeler has opened many times what really wanted develop elliptical-surfaced prototype good friend Johnnie Carrol Ireland hes fre quently judge Scale World Cham pionships came rescue vast collection reference material small three-view March 1937 issue English magazine Flight Coupled several photos G-AEPD gave us impetus start drawing Incidentally name Flight article Lively Lightweight appropriate model well Further inspiration came copy believe Walt Mooney brief text June 1958 Aero Modeller sent us article says Walt found Frank McNatty New Zealand has impossible completely eliminate dihedral 020 Free FIght Minor prototype would full size will shortly explain 32 Model Aviation bolt through flat section K&S brass soldered cabanes holds rear wing front retained section brass tubing slides ply grabber wingsimple works Landing gear two-piece torque bar-box unit adapted stock Sig gear Banner wheels used Removable hatch accesses tank bat tery OS 25 FSR Davis Diesel head Slimline muffler shown Fox 19B8 9-4 prop good choice br model author feels Cowl obtained Fiberglass Master Pilot figure must Low aspect ratio wing coupled long tail moment reminiscent Ed Heaths Parasol same era Balance Luton 30% wing chorda long way back since chord wide production version Luton Minor Irish registry now thought US Note enlarged fin squared-off stab particular airplane powered license-built Aeronca twin called JAP England Thanks Johnnle Carrol Ireland photo 6 F AILERON LINKAGE 10 SERVO IN WING CSEC11ON flAIVP -I NOW PUT C&IEL- I/4X 40 BOLT ThRU SIG SH 218 BLOCK ON 1/4 PLY BASE 1/16 SHEET C/S COVER TOPANO BOTTOM CS 1/4 SHEET BALSA I/B X 1/4 SPRUCE JOINER 1/4 X 3/8 BALSA SPARS I1/16 X 1/4 BALSA 3 LAMINATIONS 1/4 X 3/4 BALSA POSTS FOR FIN RS AND RUEOER 3/16 FOAM BOARD FILLE STAB AND RUDER 17 TILLER STRAP TO RUDDER I/BSO STRINGERS IN 1/8 BALSA FORMERS SPAR JOINER 1/4 PLY CABANE GRABBER WITh TUBE HOLE 3/32MWIRE FOR MAIN LIFT STRUTS ANCHOR INTO 3/8SQBLDCKS 1/16 MWIRE BRACES TO FIREWALL SCREWS FIBERGLAS COWL COAT HANGER THRU PLASTIC CLIPS 9X 6 PROP l/4PLY HATCH2 1/8 LITE PLY SIG 5H125LAM PLYFOR L3 MOUNT BLOCKSLIFT STRUTS 7/ DOUBLED I/eLITE PLY SIDES FROM 1 TO 3 3 BANNER WHEELS 8W-PH 0220N 5/32 M WIRE SIG RPM 231 SIG SH 132 BRACKET 1/450 BALSA LONGERONS 5/16 X 1/4 SIG TE STOCK 1/4 BALSA SPAR FILLER 1/4 50 REAR SPARS -fop AND BOTTOM 3/32 BALSA ALL RIBS I/16X 1/4 BALSA TIP 4 LAMINATIONS 5/BX 3/4 BALSA LE 1/450 TOP SPAR l/4X 3/8 BOWOM SPAR DUBRO 202 STEELSIRAPS INTO 3/8X LIFTSTRUT ENDS ITER 1 IVI L picture conjunction text shows get wing straight grabber centered fore-and-aft alignment struts determine horizontal plane stays jigged until epoxy has cured String running wing tail post check squareness simple model structure lightweight has much strength high-stress areas its needed structure blends traditional techniques modern ones E4 V NOTE RIG AILERQNS FOR LOTS OF UP LITTLE DOWN IBU PLY v07R BALSA W1ODBAkS2 I2 EACH TIP ALAMO OF 04IIC BALSA WING TIPS SCRAPTOP SPARRIB FILLER LWAINATCD7P1P LOCW0AOOLL SEAASWING TIP DETAILBOTTCM SPAR TO BLEND 1510 TIP BOA AND TILLCYD LO C I2CO V2 TRIANGLE STOCKJ I/IR MUAC WIRE 7 7 I41 030PLASTIC WINDSCREENABBE WILLIAM BROS RI 3/32 PLAXKINO GLASS COWL FROMIR 55 fIBERGLASS MASTERIa ORB tII LPAOE FROM TO OZ itl LOOP N ATTACR TOBII w - WrEB SCREWS- A8 SAtLASEA 1 REC I HAYESLAM PLY AL-OSRATER MOUNT COAT RANGER WIRE NON FUNCTIONAL STRUT LOOSE OOP AROGYC MAIN AXLEYII I/4PLY DES SHACK BUTYRATE CABLE CLAWS As far know first pub lished RC version Luton Minor LA4 prototype rather unusual model has pure delight us design build fly recommend builders pilots skill levels Construction Wire parts portion design frighten away prospective builder would probably cabane structure Therefore lets get started cabane pieces bent pairs 2-in music wire will bend rather easily large Vise-Grip plier bench vise used cutoff wheel motor tool also helpful Always discard misbent pieces rebending almost always un satisfactory Use drawing pattern develop half bend second match top right angles need bent parallel other bottom bends can left over-length Cut after installation through laminated ply sides Position two halves over drawing 34 Model Aviation -i novel method construction developed tail surfaces Foam-core board cut outline perimeter surfaced layers balsa strip glued Onto foam Hinge lines 3A6 x balsa No ribs other structure needed innovative system FULL-SIZE PLANS AVAILABLE. SEE PAGE 172 XBLGNT SLIGHTLY VASOBALr -- 1fF LX ELYI8PLY TOP SPARF~-- GUSSET _ _ 3D C GRAINI ENTER-L---WING BALSA RBS f jfF GHTL DU WARDCENTER RIBS FROM SO AOLMASTER LEGS 3/3D tOTTOM NOTCH TOE ROT IFOR I/A PLY ThREADED REAR MARS- BLOCK -I IFFFFF3/SDBALSAFI[ FilSHrTf 5JPLAN Sb S/C 3/4 LEADING EDGE STOCK 7 LAM EL GUSSE SKORNF\ FOR S RUTS TOP VIEWAPLA 0KM 0 RAP2/ NFB A-BALSASCRAP BALSAVA INFLL 5HINGE VK ELY Al ERONS ARE U F- ~-ROM ASSEMBLED WNGK PLYGOLDBERG AC DAB COGELER UBRO DOD STEEL REAR STRUTSY PS EPOXY INTO 510 PRE-ORILLED Th KSR-RB =../ FRONT STRUTCENTER SECTION DETAILI/CAO BOLT UK ELY WING srRuTs010 3/B AILERON STOCK VA BALSA INPiLL TOP 3/32 BALSA OTTOM iRPER 0FORMERS[I FUSELAGETOP VIEW -7 3/IA FOAM BOARD L43X 6ASS 5OLOERLA3/R BALSABALSA TOFLYWITH5 F ThIS POINTDRILL UKHOLE FOR NYLON BOLTDEFLECTIONS 11-RUDDER 1-1/2 TOYAL TAREADEDSOLDERVIA BRAGSOLEVATOR TOTAL SHEET -o oo-W/BOTTOM LW ELY ELATE O BRAGS YORE3/3D MUSIC WIRE UK BALSAAILERKER 1/2 UPBALSA FLUSH I/4DO NYLONTLWOTTLE CABLEI/A SPRUCE BOLT7TO SUIT ENGINESELIT SIA3/IA FOAMJOINER BOARD BATTERYNYKODATREVA3/B BALSA CABLETO SliT SERVOS FlRUDDERS LAMINATIONS I/B SO SPRUCEFRONT VIEW BFRONT VIEW CI/IA I/H STRINUEUK LITE PLYUK LITE PLY 6EDSEOFCPEELED HINGESELEVATORSTAB / SCRAP BALSAVBS/B ET I/B ANY S BRACE IDA BALSABALSAI IPINNED LEAVE RAPffrHINGE __ METAL TILLER BA-HO BOLT AG SH-13D NOROR SLOTIALWTSEEL ER W UK VO CROSSBRACRET LONBERONS I/ASOPIECES SIDE VIEWLUTON S MINOR PRUTOTTEE ERG I/B USE5/32 MW OR MODIFYSILHOUETTE SCALE 215 NIPS DID RPM D31 ONITSPAN 56 ENORD Il-I/CMINOR rnNuIrr TED WSHAREA OBO SO PBLUTON WEIGHT BO 02 ELSPOWER 20-30 CU INSP"""DESIGNED S DRAWN BY DCC MATHEWS TRACING BY JOE DEMARCO 0 2 3 A5 K FROM MARCH IL IBSVKIIAWE LAM LY ELY EPOXY 7 LW BALSA using scrap balsa proper dimension separate Tape pin units exact alignment join sweatsoldering section 7/n-in brass tube over Use heat soldering iron long enough flow solder way through tubing Wash thoroughly dope thinner remove flux after sol dering rear cabanes fabricated much same manner except pre-drilled /4-in-dia section brass sheet K&S #246 excellent wrapped copper wire Sig SI-I 330 soldered wire stubs Mark bottom stubs onto ply fuse lage sides drill outside cabanes held against formers sides split sections Sig SH 125 bass wood trunion blocks possible error step would alter height September 1983 35 Left Pushrod anti-flex braces pieces scrap balsa strip CyA-glued around rods loose fit Right Cabane wires bent silver-soldered over plans Theyre epoxied fuselage sides within sections Sig grooved landing gear block picture shows alternate wing grabber front strut Its nose wheel bracket has drilled out can bolted wing place mid-line side Measure ac curately forward struts held firewall #4 sheet-metal screws running through loops bent wire can retained soldering onto brass tube wrapping soft copper wire should installed after finishing landing gear can modified Sig RP-BM-23 unit can made 5¼2-in music wire torque-wire unit type adequate absorb forces drag wire purely decoration bent section welding rod loops hold mains fire wall brackets plastic cable connectors found Radio Shack store Wing struts functional Pick out some hard pre-formed aileron stock brackets Du-Bro steel units bent shown epoxied saw-cut slots ends Although have held up exceptionally well small stubs /6-in dowel run holes would certainly wasted effort steel brackets should accurately positioned epoxied during rigging steps ends can contoured sanded after final positioning Tail surfaces several years have laminating tips over foam-core board patterns removing proj ect chose leave foam-core board place Although unorthodox idea has worked out very well Try yourself share excellent approach curved surfaces Heres carbon paper between plan foam-core board trace inside edge tail-surface outlines pencil Cut foam-core board traced shapes sharp modeling knife Use aliphatic resin Sig Bond etc glue hinge line strips soak /16 x a laminating strips am monia water bend around pe rimeter foam-core board Masking tape used hold laminations place remove tape slowly carefully once resin has set tendency paper covering foam-core board pull off tape Sand balsa outlines half-round contour represent tubing structure full-size airplane Thats Its quick strong inexpensive neat MonoKate FabriKote recom mendations covering dope form will attack damage foam avoid sags avoid pressing covering down anywhere other perimeter heat gun used judiciously best shrinking covering Wing Standard construction used throughout ailerons cut faced after wing panel laid down Tips laminated around foam-core board form much like tail surfaces edge board faced Sig /4-in Stripe-Rite tape prevent adhering laminate form laminate course removed 36 Model Aviation Laminate wing tips around form cut foam-core board Soak balsa ammonia water easy bending use aliphatic resin glue protect form wing Only SO glue will stick Struts attach Du-Bro metal strips sheet metal screws 9O aileron horns tilted slightly give up down helps avoid aileron-induced yaw study of pictures well plan Hank Clarks cutaway will make construction much easier Docs got different engine pointa K&B 35 Davis Diesel conversion after drying overnight Dihedral gussets custom cut fit saw cuts made flush against spar faces threaded block mounted ap propriate cut-out joined center ribs ply sheet place / ply grabber trial-fitted epoxied un til rigging step aileron linkage should setup differential throws angling 900 bellcranks positioning horns used Goldberg AC 246 connectors Du-Bro 183 hardware simple wire stub would work just well Planking other ply floor should left off until jigging step has com pleted allows use clothespins and/or clamps hold center section adjusting Fuselage Construction classical way Two identical sides joined bulkheads crosspieces form box Three bulkheads interlock laminated ply sides tail post pulled together joined over top view drawing laminated ply two layers Lite Ply pop lar joined thin layer 5-mm epoxy weighted flat surface Cabane wires should installed prior putting turtle-deck nose sheeting sheeting can cut clear wire joined sides pulled down onto x strip Glue thin beads thick CyA turtle-deck stringers place trim off projections formers between avoid starved horse look Build up land scrap balsa around wire tail-wheel bracket screwed onto ply base tiller arm held rudder strip sheet metal run under either side horn As alternative skid wire would scalelike would work satisfactorily cowl held firewall small sections basswood #4 sheet metal screws Openings must made cowl choking air passage around shaft out around head muffler fiberglass unit has sufficient strength re main usable after large chunks cut away Sufficient room available mounting engine sideways upright inverted Warning long tail short nose moments Luton Minor require careful attention weight distribution 500 mAh battery pack used model weight needed As rule feel have done good job engineering design requires no ballast just no way Luton Flown initially dieselised Davis K&B 35 dieselised OS 25 FSR model needed /2 oz Sig 562 weight screwed firewall face lighter much easier muffle cowl Fox 19 BB needed full 3 oz Fox 1 9BB muffler clears sides need trickery very satisfactory Continued page 138 FOX INTRODUCES THE NEW COMPACT 40 RC WEIGHT9 oz Bore840 Stroke715 RPM 10-6 prop13000 24099 Compact 40 RC $5995 90236 Tilt-Up Muffler 1495 90237 Tilt-Down Muffler 1495 FOX MANUFACTURING CO 5305 TOWSOH AVE fORT SMITH ARK 72501 Hot Line 15011 646-1651 Youre wondering offering new 40 existing 4088 powerful rugged 40 market Well unfortunately massive construction 40B8 makes too large fit planes calling 40s answer new Compact 40 gives outstanding performance Fox lighter compact frame model interchangeable K&B OS HB Enya performs excellently no-nitro fuel superb idle transition recommend new Compact 40 size weight factors larger frame 4088 super-durability desired September 1983 37 $895 New Specials $795 Look Squadron/Signal Display ALL better Hobby Shops Book Stores favorite Hobby Shop Bookstore does carry Squadron/Signal books send $50 postage & handling Name Address us FREE Squadron/Signal catalog names distributors carry books Squadron/Signal Publication Dept SP2 1115 Crowley Dr Carrollton Tx 75011-5010 6156 t45 Ait Colors stern Fronf I find regular issue SAM 35 Speaks editors name David Baker 22 Ellington Rd Muswell Hill London NlO 3DG England long-hand slip sample says American modelers may obtain copy $700 Perhaps youll want inquire first perse vere Stop must Bill Winter 4426 Altura Ct Fairfax VA 22030 Two-Meter/Jolly Continued page 28 Mike Regans model could des cribed typical Valley competition Sailplane features fiberglass fuse lage incredibly strong wing foam spruce balsa construction Mike Bame 15% airfoilalways good taste familiar current F3B scene coun try will recognize similarity Alex Bowers Tai Tai special interest Mikes model has conventional polyhe dral geometry leads wonder ailerons really necessary high-speed Sailplane Close Regans heels another SFVSF member Mike Bame fin ished second Mike flew aileroned version Sailplane flown Regan Mike Bame very innovative modeler responsible developing materials techniques used fellow club members Speaking SFVSF no sur prise see its members claim five six top places clubs total com mitment advancing Sailplane tech nology has given members both models experience necessary well multi-task contest cause great depth talent SFVSF can muster members club will certainly strong force contend long choose compete effort away winch advantage SFVSF construc ted six identical winches use contest course gave contestants equal chance good launch memories have contest sticks mind good times generated meet Everyone came have good time did fact have good time anyone didnt should perhaps think about compete hobby/sport Personally enjoy multi-task Soaring other phase RC Sail plane flying concept TwoMeter World Cup allows others like myself enjoy thrill chal lenge closed-course racing something possible more-usual Sailplane gatherings members Modesto RC Club SFVSF particularly Mr Hanson congratulations job well done looking forward Fifth Two-Meter World Cup See Luton Minor/Mathews Continued page 37 turning 9 X 6 prop Idle marvelously slow reliable mid-range excellent adjustments breeze Rigging photos illustrates technique Start nylon bolt threaded block Measure block up both wings exactly same height off board wing bolt screwed Run string tail post exactly same point both wing panels keep adjusting fore aft position grabber loosen ing clothespins until exactly dimension determines left right thrust must zero-zero Once wing panels equal dihedral left-right grabber epoxied clamped against wing structure Avoid later necessity raising lowering wing incidence carefully measuring against flat fuselage top time After epoxy has cured unit still jigged glue steel straps strut slots 5-mm epoxy ends should screwed pre-drilled holes Rigging difficult complex However requires patience care dont hurry Covering Finishing has Mono Kote wing tail surfaces Sig Koverall fuselage Koverall heat-sealed over Coverite Balsarite heat-shrunk Three coats clear nitrate dope followed two sprayed coats Pactra Poly-U fuselage wing leading edge trim Poly U Numbers EZ-Stik vinyl6 wing 4 fuselage pilot figure Williams Bros 2i-in standard unit painted paint plastic models Banner wheels go nicely model Flying Ground handling takeoff roll must seen believed thing gets up its mains will run straight down runway mile Apparently lowto-the-ground fuselage high-up-in-theair wing combine produce truly extra ordinary handling Luton Minor doesnt need rudder stabbing steerable tail wheel get going straight down runway Just point direction want advance throttle other hand tracks darn well difficult turn around taxiing cares climb-out function wing engine intended climb prop rather uses speed climb wing steep pull-up such clear deck portion touch-and-go pre pared witness strange phenomenon 138 Model Aviation Power Soar New Heights self-addressed stamped envelope catalog ap plication notes Leisure 11 DeerspringllrvinelCA 92714 LT-50 Electric Motor 01 Cu equivelent gas engine displacement / CANNON SYSTEMS 13400-26 Saticoy Str.t North Hollywood Calif 91605 PIoo 2131764-1488 SUPER-MICRO FLITE PACKS Worlds Smallest R Units will work Standard AM Transmitters other Makes Equip aircraft SUPER MICR~Ick Flite Pack inc ud MICRO Rx 54oz- gr MICRO Servos 47 oz-~ ce BATT 100 nelsCASH PRICE 22z~Thgr$14995 33oz962 gr18350 43 BBoz 1101 gr21695 Shipping $450 27 72 MHz other freqs $1000 Calif add Sales Tax Brochure 7& US $200 Foreign CASH DISCOUNT PRICES SHOWN Credit Cards 5% VISAMore 20% Deposit Req d f COD s nose gets too high tail waggles prototype vertical fin replaced larger swoopy-looking thing have learned stab wing blank out fin high angles tack produces fish tail about 50 side side everything under controL model isnt going drop wing snap-roll just waggles tail sassy sort wayand goes merry way Hurst Bowers upon learning models fish tailing wrote has built three different Luton Minors over years tail-waggle characteristic seems perfect example model duplicating idiosyn cracy full-sized aircraft cannot get model spin Throt tled way back dead-stick matter fully stalled aileron ele vator rudder can input just mushes off side drops nose repeats cycle model extremely stable Luton Minor size wing loading exceptionally easy model fly would nice RC trainers gentle Loops tend look like hen eggs Rolls Youve got kid ding Theonly roll doll can down runway So shes aerobatic glo riously cute air ground Placed half less throttle putts sputters around unbelievably slow speeds n delightful realistic manner long-term popularity Luton Minor sport fliers stems pure joy flying same holds true model Everyone flies Luton falls love must reason con stantly use feminine gender talking about means build yourself certain enjoy Radio Technique/Myers Continued paoe 39 lems have discussing past Better read last line again caught implication what youve read understand can tear up chart June 1983 column throw away Providing flying KPR-8FD receiver Nobody RC trans mitter likely get What about guy directly chan nel FM sets have property called Cap ture Ratio What means FM receiver tends keep listening its con trol transmitter until some another transmit ter same nearby frequency shows equal greater power capture ratio receiver pretty good ground bring another FM trans mitter same channel about half distance between control transmitter airplane before saw sign inter ference air tests did Bob Aberle flew plane front us swooping low pass about 10 ft altitude 20 ft out front us straight run about 500 ft beginning ending about 100 ft altitude stood about 20 ft behind him about 30 ft away direction plane going another Kraft FM transmitter same channel Bobs As started run turned transmitter ON planned keeping ready turn OFF instant saw sign interference plane came passed its way up out before got glitch repeated test three times sure what seeing would absolutely stupid put up two planes same frequency same time place test shows get lot protection effects guy might also flying channel some nearby field some test modules allowed us put up signals 10 20 30 40 kHz off Bobs channel RC52 might just well have left home effect also AM transmitters RC54 RC56 have poten tial produce detrimental third-order mix ing products talked about 3MPI June 1983 Radio Technique column almost waste time make test couldnt generate significant inter ference until stood both transmitters antennas fully extended right over airplane Incidentally going paging transmitter pumping out strong signal 72800 30 kHz Bobs RC52 checked monitor distance 500 ft park cars paging signal times stronger Bobs RC signal receiver designed built USA It will also available new Ham channels 5080-5098 MHz should very useful will need Amateur Technicians license fly AM FM anything Ham channels can use FM system new old 7273 MHz channels license whatsoever because noexamination CB license has elimi nated announced July AMA News page 105 ANOTHER RECEIVER Hold everything Just ready mail column Reston made acquaint ance Coulter Watt Whitestone NY Coulter has flying Ace Silver Seven-equipped Sagitta Syosset NY channel RC5O 72790 MHz having noticeable trouble monster 72800 Via Don Broggini learned after several weeks flying Coulter met first glitch low down far out about retune receiver offered retuning him could just assess present state tuning first arranged did found very little could improve factory tuning maybe 15% improvement SMASH SUCCESS TOLEDO! Thousands Already SOL D! 242 PAGES KITS/RADIOS ENGIN ES/ACCESSORIES TOOLS/SUPPLIES BOOKS/EQUIPMENT Major minor US Manufacturers represented entire product line Technical Descriptions & Prices Photos & Illustrations & Buy Hundreds Scratch Plans Model Aviation RCM & Others An Invaluable Source Book Products Beginner Expert See July 83 Model Aviation Product Review Guide Dealer Inquiries Welcome See Local Dealer Order Direct NAME ADDRESS Send check money order Consumers Guide Consumers Guide P0 Box 376 Greet FeiI VA 22066 Send SOSOllncludespoetegelhendfing3 Canadian Orders send $735 linciudes poe hand Oversees orders send $786 tincludes postlhendl MA September 1983 139 First Guide Devoted Exclusively R/C Aircraft