Breakfast Specials

No doubt conceived during lull local fast food chain models nonetheless great flying prove once again unique materials can very successful right imagination involved EJohn Voorhees THESE TWO MODELS have flying sur faces cut lids McDonalds breakfast cartons basic parts same small body stick modifications necessary adapt design other Breakfast Special GL catapult-launched hand-launched athletic glider Breakfast Special RP pro peller-driven rubber-powered model intended low-cost projects youngsters lazy adults like group instruction fly very well out doors quite durable tolerate wind better small models lost RP models out-of-sight nice thermal flight test flying lunch hour few months ago completely stock model no special weight-reduction modifications Adult su pervision assistance should pro vided kids under 12 years unless have some previous successful model building craft experience Construction Collect four McDonalds lids airplane wish build Top Agroupof prop-driven Specialsare mass launched during aCub Scoutcontestlfl Ohio Above completed rubber-powered version Prop Sig flying surfaces youThere least two ways dothis either know-where stick 1/s-ln balsa photos author unless otherwise noted September 1986 53 Left Cutthe templates heavy stock make XActo blade cutting block described text help cut out wing accurately Right Cut fuselage hard Is-In balsa Text contains details lightening stick other modificatIons longer flight times go pig-out yourself walk around asking other customers may have carton lids Dont worry youll get used puzzled looks get special interest fact some lids obtained Anahiem CA McDonalds across street Dis neyland weighed two-thirds much obtained local Ohio area much better propellerdriven models might little weak catapult gliders wasnt able obtain enough test gliders always embarrasses wife go around asking lids best appearance lids used given model should alike Lids McDonalds Hot Cakes Big Breakfast Scrambled Eggs suitable especially careful get both lids used wings during same breakfast period reasonably sure produced same roll sheet foam may some density thickness variations between lids produced different lots quantity lids group project ask manager sell some Ohio sleeve 125 lids costme $316 1985 Kit preparation Make Xerox copy plan patterns Cut out body stick pattern carefully splice neces sary copy body stick make sure joining copies top stick makes straight line passes through splice will enable retain correct angular relationship tween wing horizontal tail number models made scout troop may want glue patterns light cardboard extra dura bility drawings show patterns should placed carton lids wing horizontal tail fin pattern should placed entirely within flat area carton lid cut wing leading edges cement shank new #11 X-Acto knife blade top smooth wood block /16-in thick Place carton lid upside down smooth kitchen counter tabletop left hand center lid hold against tabletop slide block knife blade along side lid lightly scribing cutting just tip blade Make repeated passes cut through lid cleanly along entire leading edge wing two similar carton lids Orient both printing lid can read right-side up look down wing behind trailing edge looks better way pro cedure assures uniform leading edge height /i6-in cuts except leading edge wing cut foam razor blade new hobby knife blade young kids best use scissors much safer will satisfactory job cutting foam used carefully especially careful cutting ends wings halves will joined together form dihedral joint Sand ends 54 Model Aviation Nine-year-old Amy Rosinaki shows us two several stages development propel br-driven Breakfast Special has gone through Original version left latest right built original fail 1983 wIth some help father Testing new Special author shows us proper launch technique angle P30 model plc Dick Palmer Concentration Cub Scouts face prepares reiease modei says just far piane can take young modeier necessary eliminate gaps necessary sand other edges have good-flying model slight improvement performance though can round leading edges trailing edges tail surfaces bevel wing trailing edge less 1A2-in body stick made strong -in A-grain sheet balsa Experienced builders should use medium density 7 10 lb/cu ft wood Beginners would better use Catapuit isunches can reach 50 ft before forces exceed wing strength Model also hand isunches weii youre athietic hard balsa lessens chance breakage Trace around body stick pattern onto sheeting ball-point pen cut out care using sharp hobby knife Give special attention wing slot Note differences body stick nose outline between catapult glider propeller-driven model also note bump supports rear motor hook propeller-driven model best performance appearance round edges body stick sandpaper everywhere except tail surfaces mounted reduce weight tail use sanding block taper body stick rear motor hook loca tion back thickness /i6in extreme tail end youre impatient can skip step After sanding finished may want apply coat either clear lightlycolored dope body stick im proves appearance somewhat will also reduce performance slightly due additional weight Obviously also ex tends building time too optional recommended young builders beginner groups want performance performance can reduce weight fur ther lessening vertical height body stick about above below wing Dont change angle horizontal tail though step recommended group leaders give Continued page 153 September 1986 55 Full-Size Plan Pages 86-87 Amy shows us proper technique iaunching catapuit version iength piiots arms best determines proper length catapuit rubber strip Test Pilot MACA Engineer Combat power systems analyst listing Help Wanted section latest MACA Newsletter What deal get play very latest equipment manufacturers get findings published MACA Newsletter MA too Send resume Doc Passen PO Box 111 Jasonville IN 47438 serious position dont waste Docs time some crank letter better call him instead Issues MACA Newsletter have coming out time have lots interesting articles best way join MACA sending check $10 MACA 17400 Harlem Ave Tinley Park IL 60477 Ill taking pictures MACA upcoming meets want star bring model see Charlie Johnson 3716 Ingraham St San Diego CA 92109 RC Pylon Racing/Hager Continued page 52 until know whats going Also remember no two aircraft alike must treated individuals Finally please realize above sugges tions just what works may work place start hope try will benefit Racing still going strong Tennessee reported Greg Doe Smyrna Air Races surprise store everyone year no rain Several contestants wearing raincoats carrying umbrellas pilots meeting Saturday morning can guess trying protect themselves sun Sixty-five contestants 15 states ac counted 97 entries three events Quarter Midget drew 32 entries Formula 23 Entries both events up last year Sport Pylon divided two separate matrices 19 Novices 23 Experts Quarter Midget half Formula flown Saturday balance F-I Sport Pylon Novice Expert flown Sunday QM three-way tie after five rounds settied times due frequency conflict top five Moorhead Jacobson Brue shaber Clark Bussell Best Finish F-I went Norm Johnson After five rounds regulation heats firstplace tie existed between Fred French Dave Pearce Theres name past though Dave fast time Fred managed win flyoff three-way tie also existed fourth place between Oliver Bussell McDermott John provided excitement flyoff demolished beautiful Bruce Polecat down front straightaway Sport Pylon provided some closest racing weekend Dividing Novices Experts up helped eliminate demoralizing feeling beginner experiences gets doors blown away flying against seasoned Experts Two Jims always top Sport Pylon out Jim Moorhead crashed test flight possible radio failure interference Jim Bartels didnt make contest 1986 continued tradition Pylon Racing Tennessee Another record set year support 45 fine people gave up part weekend contestants could race Which brings subject reaflirm ing Lyle Larsons comments last months newsletter NMPRA News Release Lets try become better sportsmen sport doesnt die 18 years racing Ive never wituessed volunteer unpaid race worker delib erately single out contestant either call cuts allow cuts go unreported Its difficult understand cant accept race official human being capable making honest mistake fact its contradiction contestants can cut midair crash plus number other stupid mistakes totally intolerant mistake official dont mention prima donnas think theyre incapable cutting Dont misunderstand Im saying shouldnt able ask questions No CD should object polite inquiry about some ruling call As matter fact mistakes corrected because contestants check results question call once final decision made accept results Its okay politely register complaint Sometimes will lead improvement procedure might eliminate future problem Just remember keep sportsmanship sport Results Smyrna Air Races April 26-27 1986 Sport PylonNovice 1 B West 1308 2 B Serotta 1417 3 5 Johnson 1373 4 J Wathey 1581 5 J Morton 1432 Sport PylonExpert 1 K Heatlie 1216 2 D Whiteaker 1223 3 G Jacobson 1213 4 5 Kovach 1287 5 F French 1205 Quarter Midget 1 J Moorhead 1167 2 G Jacobson 1189 3 D Brueshaber 1198 4 J Clark 1239 5 P Bussell 1169 Formula 1 F French 1136 2 D Pearce 1118 3 J Demeritte 1154 4 R Oliver 1166 5 P Bussell 1146 Greg really has some good points sportsman ship Hope see years Nats Bill Hager 706 Glen Haven Dr Conroe Th 77385 B reakfast/Voorhees Continued page 55 model chance beating built kids should safely home contest flying session before figure out what did Assembly kids doing building aliphatic resin glues such Elmers Titebond Wilhold other white watersoluble glues should used foam joints Experienced modelers regu larly use cyanoacrylate CyA adhe sives can use sparingly accelerator used stop glue dissolving foam parts tack parts together several tiny dots Zap CA hit immediately shot Zip Kicker accelerator After model fully assembled apply thin fillet white glues over complete joint set whole airplane aside dry several hours overnight Begin assembly joining wing halves center tips blocked up 1 4 1 -in above joint sure halves fit together well minimize September 1986 153 m m Co I 1 0 -1 m C z 0 0 0 C Co CD 0 z 0 z 0 C 0 -a 0 -u m m JJ 0 0 0 -I CD CD 0 0 C 0 0 CD 0 0 31 0 Bij N Q Co n CA x Ca rh x x 11 x x 0 x U .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak5495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly$795 Add $3 postage handling tirat 3 ckages 10% additional mePie474/Ua1P P0 8ox68132 AIRCRAFT CO Portland OR 97268 Ir~1I 5 4J4LuA inEKKSNIiIU mYma LUZLI BENTOM BROWN JR CAMPBELL COMET COVERITE COX DUBRO EASY BUILT MODELS ENVA FM FLYLIN Etm FOX- GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT RN MODELS- SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE WILLIAMS & OTHERS ESTES MODEL ROCKETS U Sead C 100 Cash Chsok o Stamps lot 44 pag tabloid Sia DISCOUNT Catalog 900 illostrations osor 700 Kits rhoose Iron IMAILORDER PI4ONEORDER IN STORE PENN VALLEY HOllY CENTER fl7 V Main St Lansdalmla 19449 L 1a nt glue needed building RP version glue nose bearing rear motor hook wrapped thread shown plans wing drying glider wrap thread around nose area reinforcement rub glue wrap ping Any type glue may used body stick apply sparingly rear plane body stick dry enough handle pin down flat piece wax paper glue vertical fm place After joint dries place straight-edge along bottom body stick tail end trim off small overhanging part vertical tail exactly line bottom body stick Next horizontal tail may pinned glued place Glue body stick vertical tail both tail surfaces may moved initial flight trimming wing center joint dry sand bottom wing will slide freely slot body stick Pin wing place fuselage apply con tinuous thin fillet glue wing meets body stick both sides top bottom Once glue has thoroughly dried glider version finished thing left to attach 6-in length -in x 042 rubber strip tied loop 6in length -in wooden dowel will serve catapult Small kids short arms may require shorter loop rubber can stretch sufficiently launch airplane propeller-driven model install 7-in plastic prop its shaft Care fully examine freewheeling notch prop hub Clean up rough edges necessary sure bent wire end will drive prop no rough edges will catch wire prop supposed freewheel Balance prop sanding hard work trimming scissors easy heavy blade Some plastic props far out balance plane will shake like wet dog climbing dont omit step Put small drop oil thrust bearing prop shaft Cut some 24-in lengths A-in x 042 rubber strip motors helpful put small metal rings motor make easier reconnect rubber rear hook once has wound can usually found fishing tackle stores can bend yourself best performance rubber should coated rubber lube can substitute liquid hand soap Armorall Apply lube lightly motor just before using first time Add modeling clay nose balances level supported fingertips placed curl leading edge wing tips Flying trimming Finally reason work have built straight lightweight plane reap reward Unless quite experienced gliders rubber-powered models refrain flying until have period calm air Evenings usually best need large open area least 100 ft clear directions glider 200 ft propeller-driven model is wind will need clear space downwind direction Dont test fly over blacktop especially glider Beginners generally make some bad launches no point breaking model unnecessarily Before flying look directly front model see body stick bent left right vertical fin angled way other rear part fin should yet glued place Bend left side centerline about Yn /16in extreme rear edge insert thin straight pin upward through bottom horizontal stab edge-wise through vertical fin will hold initial turn adjustment Once sure glider turning left can try catapult launch Hold rear end body stick vertical tail between thumb index finger right hand Extend middle finger beneath horizontal tail Hold cata pult stick left hand catch rubberband securely notch nose glider Bank glider right aim up 300 450 angle theres breeze aim Stretch rubberband hard release tail glider should climb steeply overhead roll left turn circles right climbing left offset vertical fin should increased enters vertical climb stalls drops its nose didnt stretch catapult enough launch goes up rolls left comes down fast left turn two possibilities 1 left circle smaller SOft diameter reduce left offset vertical fin /n-in try again 2 left circle seems near 50 ft larger diameter remove some nose weight try again model descends left circle continues dip up down glides add small amount clay nosejust enough barely eliminate dip Built according plan glider trim should OK subteen smaller teenage kids older fliers have longer arms can stretch out longer catapult band higher launch can achieved little bit down elevator~ provided balsa foam wedge about /i6in maximum thickness tapering nothing over 1 1 can inserted under bottom rear edge vertical fin causing horizontal stab bend downward will straighten out initial climb allow ing model go higher strong launch After adjustment made may need remove little clay nose obtain glide limit exceeded wing folds up launch dont expect get gliders 154 Model Aviation CARBIDE SCRIBER 499 HARRY ft HIGLEY soia INC PO BOX 532 GLINWOOD ILL 60425 FLAIR MODELS FROM ENGLAND BARONETTE $11995 49 Span 25-40 2 stroke 30-60 4 stroke Pre-Cut Balsa & Ply Parts Hardware Tank Spun Aluminum Cowls Dealer Order Direct Free Catalogue Available MORLEY USA 2ll8ArchdaleDrive Charlotte NC 28210 704-553-2703 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engi nes Hardware eBooks eFinishing Materials Accessories Videos OR/C Dealers Win $1000 $500 $250 R/C Merchandise retailer choice eligible simply fill Out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide picas send request payment 13 ltO plus postage/handling 3 Radio Contml Bues Gukie Clifton HouseeClifton VA 22024 * You may use VISA Mastercard charge payment sending card number expiration date order over about 50 ft high satisfied adjustments use little water-soluble glue fix rear part vertical tail horizontal tail dry can remove pin held trim adjustments Trimming prop-driven model time should have balanced model clay offset rear edge vertical fin about 6 left pinned place calm evening large open space wind lubricated motor about 150 turns launch model gentle toss direction slightly upward over 15 above horizon Ideally should proceed shallow climb turning large circle right because right thrust molded Sig plastic nose bearing descend smooth gliding turn left Adjust rear edge vertical fin no Y32 time get right climbing turn should smaller 50 ft dia can largeor large left turn dangerous condition tight turn under power turns look good climb glide begin increase power 50 added turns per flight geared winder will handy friend bent wire stooge hold prop motor wound rear Stretch rubber about 40 begin winding move continue winding winding com plete back origlnal motor length Watch fught carefully model descends fast glide remove some clay dips up down glide add some clay nose stalls climb put thin balsa shim foam wedge over Via-in thick tapering nothing over ito 1 under rear verti cal fin bend horizontal stab down plane fails climb wedge too thick both glider prop-driven models very fine adjustment can made tail surfaces sanding taper rear edges has same effect shimming offsetting surfaces subtly hope enjoy building flying models have questions com ments suggestions may call after 600 pm Eastern time 513 4928685 Partial kits including die-cut body stick detailed building instructions patterns printed card stock rubber necessary hardware may obtained quantities 10 postpaid $175 gliders $250 rubber-powered models carton lids glue thread included Fly Max mmmmmmmmmmmmmmmmm UI II MOWNG LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requiredI change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II Address City/State __________________ ZIP _______ ModelAviation 1810 Samuol Morse Dr Reston VA 22090I mm mm mm mm mm mm1 September 1986 155 1429 Fox Dale P1 Sidney OH 45365 clever ruse hinging rudder letting find ____________________________________ felt happiest solve problem FF Duration/Hartill straightened out flights right winners Continued page 59 circle _________________________________________________ Top dog Peanut Clarence Mather Parnall Pixie top Junior Jeff Witt man definitely has knack Tailwind Contester Lacey Ralph Cooke put up fine flights trio Gas jobs Ian Payne slipped fine float-equipped Vultee L-1 third Gas Second Ferrell Papic tried-and-true Astro 02-powered Bleriot 7 taking top honors Bill Stromans Taube CO-2 power Its great flier new one-inch-to-the-foot Bellanca CF four cells takes Astro 02 worked marvelously extra weight really nice thing about electric can always move batteries rearward balance motor prop xeight prop Bristol slotted hub Dick Howards famous cottage-cheese-container plastic blades glued Theyre almost indestruc tible contest scene April May months hard keep up going San Diego Scale Staffel Annual interesting set Otay Mesa about mile Mexican border place alive La Migra US Immigration Naturalization officers well illegals heading north work fields California Just meet got going well moved Navy Seals parachute team could make several drops onto field Still lots great thermals lots neat Scale activity week later off Taft Taft Free Fligliter means space thermals hobnobbing lots people know what doing exactly Memorial Day weekend meet US Free Flight Championships year being number 16 great fun events almost type imaginable both Indoors Out couple non-Free Flight types put evening demonstration precision Quarter-Scale aero batics two Quadra-powered Lasers Both crashed Free Flight planes did year quality flying excellent Scale Taft always fun because have ROG rise off ground great booming thermals can place mediocre models have look fantastic Still models notably mediocre Mike Mulligans Jumbo Rubber Cranwell Parasol Loren Williams Rumpler Bipe Dick Siefrieds 54-inch Me-109 PT-19 making easy flights 1-1/2 two minutes Mulligans ship directionalstability problems last year employed Happy hint Ferrell Papic tells us rubber lube great taking Hot Stuff off fingers took top off bottle Hot Stuff internal pressure built up days heat squirted over placebut luckily eyes rubber-lubing about half hour afterwards Don Srull out spying West Coast secrets DC Maxecuters sald uses baby oil same purpose Ill have try ideas since usually wind up using sanding block 60-grit gamet paper get dang stuff off own bod Just received new Repla-Tech International aircraft catalogs two booklets can get sending $360 company 48500 McKenzie Highway Vida OR 974881 heartily recommend stuff modelers can use way Aeromodeller plans Hirsch raceplane drawings forty-cent black-andwhite snaps Golden Age racers packs color shots covering tons good subjects Tiger Moth pack features ancient brass com passes mahogany instrument panels both cockpits photo packs seem hover around average price 80 cents per snap color some have upwards 40 pictures same plane Some others have five serious about particular plane bargaln catalog descriptions worth trip Send along experiences have tiny Electric Scale jobbies well try keep gang posted Ciao Bill Warner 423 San Vicente Blvd Santa Monica CA 90402 build modern Wakefield go flying us perhaps would alter thinking whether World Competitive Russian Wakefield desIgn features Now lets take look what advanced technology has done FiB design Just remember part competition formula Ron Pol lard Great Britain has written interesting paper describing development Russian Wakefields paper presented SMAE Technical Symposium 1985 Design analysis excerpted follows Note following abbreviations DPR Delayed Prop Release VIT Variable-Incidence Tall AR Auto Rudder VIW Variable-Incidence Wing wish increase climb rate model two options open crease power use power available efficiently power available Wakefield virtually fixed energy-stor age-capacity rubber quality sec ond option open Improved efficiency means reduced drag significance means wing drag Lift drag interrelated given wing section incidence fore lift could reduced zero drag would reduce dramatically trouble theory lift model will climb unless. unless model pointed way wish go upwards steepest angle possibleverti cal practical best climb configuration need look no further designs used Power fliers So get following features WIng airfoil section should have low camber thinfive six percent aspect ratio should range moderate high 121 151 dihedral should rela tively low flat center resist turn Fuselage Short nose long tall moment arm low pylon keep model going straight resist turn Center gravIty Forward location 550/s Continued page 158 156 Model Aviation FF Scale/Warner Continued page 57

No doubt conceived during lull local fast food chain models nonetheless great flying prove once again unique materials can very successful right imagination involved EJohn Voorhees THESE TWO MODELS have flying sur faces cut lids McDonalds breakfast cartons basic parts same small body stick modifications necessary adapt design other Breakfast Special GL catapult-launched hand-launched athletic glider Breakfast Special RP pro peller-driven rubber-powered model intended low-cost projects youngsters lazy adults like group instruction fly very well out doors quite durable tolerate wind better small models lost RP models out-of-sight nice thermal flight test flying lunch hour few months ago completely stock model no special weight-reduction modifications Adult su pervision assistance should pro vided kids under 12 years unless have some previous successful model building craft experience Construction Collect four McDonalds lids airplane wish build Top Agroupof prop-driven Specialsare mass launched during aCub Scoutcontestlfl Ohio Above completed rubber-powered version Prop Sig flying surfaces youThere least two ways dothis either know-where stick 1/s-ln balsa photos author unless otherwise noted September 1986 53 Left Cutthe templates heavy stock make XActo blade cutting block described text help cut out wing accurately Right Cut fuselage hard Is-In balsa Text contains details lightening stick other modificatIons longer flight times go pig-out yourself walk around asking other customers may have carton lids Dont worry youll get used puzzled looks get special interest fact some lids obtained Anahiem CA McDonalds across street Dis neyland weighed two-thirds much obtained local Ohio area much better propellerdriven models might little weak catapult gliders wasnt able obtain enough test gliders always embarrasses wife go around asking lids best appearance lids used given model should alike Lids McDonalds Hot Cakes Big Breakfast Scrambled Eggs suitable especially careful get both lids used wings during same breakfast period reasonably sure produced same roll sheet foam may some density thickness variations between lids produced different lots quantity lids group project ask manager sell some Ohio sleeve 125 lids costme $316 1985 Kit preparation Make Xerox copy plan patterns Cut out body stick pattern carefully splice neces sary copy body stick make sure joining copies top stick makes straight line passes through splice will enable retain correct angular relationship tween wing horizontal tail number models made scout troop may want glue patterns light cardboard extra dura bility drawings show patterns should placed carton lids wing horizontal tail fin pattern should placed entirely within flat area carton lid cut wing leading edges cement shank new #11 X-Acto knife blade top smooth wood block /16-in thick Place carton lid upside down smooth kitchen counter tabletop left hand center lid hold against tabletop slide block knife blade along side lid lightly scribing cutting just tip blade Make repeated passes cut through lid cleanly along entire leading edge wing two similar carton lids Orient both printing lid can read right-side up look down wing behind trailing edge looks better way pro cedure assures uniform leading edge height /i6-in cuts except leading edge wing cut foam razor blade new hobby knife blade young kids best use scissors much safer will satisfactory job cutting foam used carefully especially careful cutting ends wings halves will joined together form dihedral joint Sand ends 54 Model Aviation Nine-year-old Amy Rosinaki shows us two several stages development propel br-driven Breakfast Special has gone through Original version left latest right built original fail 1983 wIth some help father Testing new Special author shows us proper launch technique angle P30 model plc Dick Palmer Concentration Cub Scouts face prepares reiease modei says just far piane can take young modeier necessary eliminate gaps necessary sand other edges have good-flying model slight improvement performance though can round leading edges trailing edges tail surfaces bevel wing trailing edge less 1A2-in body stick made strong -in A-grain sheet balsa Experienced builders should use medium density 7 10 lb/cu ft wood Beginners would better use Catapuit isunches can reach 50 ft before forces exceed wing strength Model also hand isunches weii youre athietic hard balsa lessens chance breakage Trace around body stick pattern onto sheeting ball-point pen cut out care using sharp hobby knife Give special attention wing slot Note differences body stick nose outline between catapult glider propeller-driven model also note bump supports rear motor hook propeller-driven model best performance appearance round edges body stick sandpaper everywhere except tail surfaces mounted reduce weight tail use sanding block taper body stick rear motor hook loca tion back thickness /i6in extreme tail end youre impatient can skip step After sanding finished may want apply coat either clear lightlycolored dope body stick im proves appearance somewhat will also reduce performance slightly due additional weight Obviously also ex tends building time too optional recommended young builders beginner groups want performance performance can reduce weight fur ther lessening vertical height body stick about above below wing Dont change angle horizontal tail though step recommended group leaders give Continued page 153 September 1986 55 Full-Size Plan Pages 86-87 Amy shows us proper technique iaunching catapuit version iength piiots arms best determines proper length catapuit rubber strip Test Pilot MACA Engineer Combat power systems analyst listing Help Wanted section latest MACA Newsletter What deal get play very latest equipment manufacturers get findings published MACA Newsletter MA too Send resume Doc Passen PO Box 111 Jasonville IN 47438 serious position dont waste Docs time some crank letter better call him instead Issues MACA Newsletter have coming out time have lots interesting articles best way join MACA sending check $10 MACA 17400 Harlem Ave Tinley Park IL 60477 Ill taking pictures MACA upcoming meets want star bring model see Charlie Johnson 3716 Ingraham St San Diego CA 92109 RC Pylon Racing/Hager Continued page 52 until know whats going Also remember no two aircraft alike must treated individuals Finally please realize above sugges tions just what works may work place start hope try will benefit Racing still going strong Tennessee reported Greg Doe Smyrna Air Races surprise store everyone year no rain Several contestants wearing raincoats carrying umbrellas pilots meeting Saturday morning can guess trying protect themselves sun Sixty-five contestants 15 states ac counted 97 entries three events Quarter Midget drew 32 entries Formula 23 Entries both events up last year Sport Pylon divided two separate matrices 19 Novices 23 Experts Quarter Midget half Formula flown Saturday balance F-I Sport Pylon Novice Expert flown Sunday QM three-way tie after five rounds settied times due frequency conflict top five Moorhead Jacobson Brue shaber Clark Bussell Best Finish F-I went Norm Johnson After five rounds regulation heats firstplace tie existed between Fred French Dave Pearce Theres name past though Dave fast time Fred managed win flyoff three-way tie also existed fourth place between Oliver Bussell McDermott John provided excitement flyoff demolished beautiful Bruce Polecat down front straightaway Sport Pylon provided some closest racing weekend Dividing Novices Experts up helped eliminate demoralizing feeling beginner experiences gets doors blown away flying against seasoned Experts Two Jims always top Sport Pylon out Jim Moorhead crashed test flight possible radio failure interference Jim Bartels didnt make contest 1986 continued tradition Pylon Racing Tennessee Another record set year support 45 fine people gave up part weekend contestants could race Which brings subject reaflirm ing Lyle Larsons comments last months newsletter NMPRA News Release Lets try become better sportsmen sport doesnt die 18 years racing Ive never wituessed volunteer unpaid race worker delib erately single out contestant either call cuts allow cuts go unreported Its difficult understand cant accept race official human being capable making honest mistake fact its contradiction contestants can cut midair crash plus number other stupid mistakes totally intolerant mistake official dont mention prima donnas think theyre incapable cutting Dont misunderstand Im saying shouldnt able ask questions No CD should object polite inquiry about some ruling call As matter fact mistakes corrected because contestants check results question call once final decision made accept results Its okay politely register complaint Sometimes will lead improvement procedure might eliminate future problem Just remember keep sportsmanship sport Results Smyrna Air Races April 26-27 1986 Sport PylonNovice 1 B West 1308 2 B Serotta 1417 3 5 Johnson 1373 4 J Wathey 1581 5 J Morton 1432 Sport PylonExpert 1 K Heatlie 1216 2 D Whiteaker 1223 3 G Jacobson 1213 4 5 Kovach 1287 5 F French 1205 Quarter Midget 1 J Moorhead 1167 2 G Jacobson 1189 3 D Brueshaber 1198 4 J Clark 1239 5 P Bussell 1169 Formula 1 F French 1136 2 D Pearce 1118 3 J Demeritte 1154 4 R Oliver 1166 5 P Bussell 1146 Greg really has some good points sportsman ship Hope see years Nats Bill Hager 706 Glen Haven Dr Conroe Th 77385 B reakfast/Voorhees Continued page 55 model chance beating built kids should safely home contest flying session before figure out what did Assembly kids doing building aliphatic resin glues such Elmers Titebond Wilhold other white watersoluble glues should used foam joints Experienced modelers regu larly use cyanoacrylate CyA adhe sives can use sparingly accelerator used stop glue dissolving foam parts tack parts together several tiny dots Zap CA hit immediately shot Zip Kicker accelerator After model fully assembled apply thin fillet white glues over complete joint set whole airplane aside dry several hours overnight Begin assembly joining wing halves center tips blocked up 1 4 1 -in above joint sure halves fit together well minimize September 1986 153 m m Co I 1 0 -1 m C z 0 0 0 C Co CD 0 z 0 z 0 C 0 -a 0 -u m m JJ 0 0 0 -I CD CD 0 0 C 0 0 CD 0 0 31 0 Bij N Q Co n CA x Ca rh x x 11 x x 0 x U .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak5495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly$795 Add $3 postage handling tirat 3 ckages 10% additional mePie474/Ua1P P0 8ox68132 AIRCRAFT CO Portland OR 97268 Ir~1I 5 4J4LuA inEKKSNIiIU mYma LUZLI BENTOM BROWN JR CAMPBELL COMET COVERITE COX DUBRO EASY BUILT MODELS ENVA FM FLYLIN Etm FOX- GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT RN MODELS- SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE WILLIAMS & OTHERS ESTES MODEL ROCKETS U Sead C 100 Cash Chsok o Stamps lot 44 pag tabloid Sia DISCOUNT Catalog 900 illostrations osor 700 Kits rhoose Iron IMAILORDER PI4ONEORDER IN STORE PENN VALLEY HOllY CENTER fl7 V Main St Lansdalmla 19449 L 1a nt glue needed building RP version glue nose bearing rear motor hook wrapped thread shown plans wing drying glider wrap thread around nose area reinforcement rub glue wrap ping Any type glue may used body stick apply sparingly rear plane body stick dry enough handle pin down flat piece wax paper glue vertical fm place After joint dries place straight-edge along bottom body stick tail end trim off small overhanging part vertical tail exactly line bottom body stick Next horizontal tail may pinned glued place Glue body stick vertical tail both tail surfaces may moved initial flight trimming wing center joint dry sand bottom wing will slide freely slot body stick Pin wing place fuselage apply con tinuous thin fillet glue wing meets body stick both sides top bottom Once glue has thoroughly dried glider version finished thing left to attach 6-in length -in x 042 rubber strip tied loop 6in length -in wooden dowel will serve catapult Small kids short arms may require shorter loop rubber can stretch sufficiently launch airplane propeller-driven model install 7-in plastic prop its shaft Care fully examine freewheeling notch prop hub Clean up rough edges necessary sure bent wire end will drive prop no rough edges will catch wire prop supposed freewheel Balance prop sanding hard work trimming scissors easy heavy blade Some plastic props far out balance plane will shake like wet dog climbing dont omit step Put small drop oil thrust bearing prop shaft Cut some 24-in lengths A-in x 042 rubber strip motors helpful put small metal rings motor make easier reconnect rubber rear hook once has wound can usually found fishing tackle stores can bend yourself best performance rubber should coated rubber lube can substitute liquid hand soap Armorall Apply lube lightly motor just before using first time Add modeling clay nose balances level supported fingertips placed curl leading edge wing tips Flying trimming Finally reason work have built straight lightweight plane reap reward Unless quite experienced gliders rubber-powered models refrain flying until have period calm air Evenings usually best need large open area least 100 ft clear directions glider 200 ft propeller-driven model is wind will need clear space downwind direction Dont test fly over blacktop especially glider Beginners generally make some bad launches no point breaking model unnecessarily Before flying look directly front model see body stick bent left right vertical fin angled way other rear part fin should yet glued place Bend left side centerline about Yn /16in extreme rear edge insert thin straight pin upward through bottom horizontal stab edge-wise through vertical fin will hold initial turn adjustment Once sure glider turning left can try catapult launch Hold rear end body stick vertical tail between thumb index finger right hand Extend middle finger beneath horizontal tail Hold cata pult stick left hand catch rubberband securely notch nose glider Bank glider right aim up 300 450 angle theres breeze aim Stretch rubberband hard release tail glider should climb steeply overhead roll left turn circles right climbing left offset vertical fin should increased enters vertical climb stalls drops its nose didnt stretch catapult enough launch goes up rolls left comes down fast left turn two possibilities 1 left circle smaller SOft diameter reduce left offset vertical fin /n-in try again 2 left circle seems near 50 ft larger diameter remove some nose weight try again model descends left circle continues dip up down glides add small amount clay nosejust enough barely eliminate dip Built according plan glider trim should OK subteen smaller teenage kids older fliers have longer arms can stretch out longer catapult band higher launch can achieved little bit down elevator~ provided balsa foam wedge about /i6in maximum thickness tapering nothing over 1 1 can inserted under bottom rear edge vertical fin causing horizontal stab bend downward will straighten out initial climb allow ing model go higher strong launch After adjustment made may need remove little clay nose obtain glide limit exceeded wing folds up launch dont expect get gliders 154 Model Aviation CARBIDE SCRIBER 499 HARRY ft HIGLEY soia INC PO BOX 532 GLINWOOD ILL 60425 FLAIR MODELS FROM ENGLAND BARONETTE $11995 49 Span 25-40 2 stroke 30-60 4 stroke Pre-Cut Balsa & Ply Parts Hardware Tank Spun Aluminum Cowls Dealer Order Direct Free Catalogue Available MORLEY USA 2ll8ArchdaleDrive Charlotte NC 28210 704-553-2703 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engi nes Hardware eBooks eFinishing Materials Accessories Videos OR/C Dealers Win $1000 $500 $250 R/C Merchandise retailer choice eligible simply fill Out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide picas send request payment 13 ltO plus postage/handling 3 Radio Contml Bues Gukie Clifton HouseeClifton VA 22024 * You may use VISA Mastercard charge payment sending card number expiration date order over about 50 ft high satisfied adjustments use little water-soluble glue fix rear part vertical tail horizontal tail dry can remove pin held trim adjustments Trimming prop-driven model time should have balanced model clay offset rear edge vertical fin about 6 left pinned place calm evening large open space wind lubricated motor about 150 turns launch model gentle toss direction slightly upward over 15 above horizon Ideally should proceed shallow climb turning large circle right because right thrust molded Sig plastic nose bearing descend smooth gliding turn left Adjust rear edge vertical fin no Y32 time get right climbing turn should smaller 50 ft dia can largeor large left turn dangerous condition tight turn under power turns look good climb glide begin increase power 50 added turns per flight geared winder will handy friend bent wire stooge hold prop motor wound rear Stretch rubber about 40 begin winding move continue winding winding com plete back origlnal motor length Watch fught carefully model descends fast glide remove some clay dips up down glide add some clay nose stalls climb put thin balsa shim foam wedge over Via-in thick tapering nothing over ito 1 under rear verti cal fin bend horizontal stab down plane fails climb wedge too thick both glider prop-driven models very fine adjustment can made tail surfaces sanding taper rear edges has same effect shimming offsetting surfaces subtly hope enjoy building flying models have questions com ments suggestions may call after 600 pm Eastern time 513 4928685 Partial kits including die-cut body stick detailed building instructions patterns printed card stock rubber necessary hardware may obtained quantities 10 postpaid $175 gliders $250 rubber-powered models carton lids glue thread included Fly Max mmmmmmmmmmmmmmmmm UI II MOWNG LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requiredI change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II Address City/State __________________ ZIP _______ ModelAviation 1810 Samuol Morse Dr Reston VA 22090I mm mm mm mm mm mm1 September 1986 155 1429 Fox Dale P1 Sidney OH 45365 clever ruse hinging rudder letting find ____________________________________ felt happiest solve problem FF Duration/Hartill straightened out flights right winners Continued page 59 circle _________________________________________________ Top dog Peanut Clarence Mather Parnall Pixie top Junior Jeff Witt man definitely has knack Tailwind Contester Lacey Ralph Cooke put up fine flights trio Gas jobs Ian Payne slipped fine float-equipped Vultee L-1 third Gas Second Ferrell Papic tried-and-true Astro 02-powered Bleriot 7 taking top honors Bill Stromans Taube CO-2 power Its great flier new one-inch-to-the-foot Bellanca CF four cells takes Astro 02 worked marvelously extra weight really nice thing about electric can always move batteries rearward balance motor prop xeight prop Bristol slotted hub Dick Howards famous cottage-cheese-container plastic blades glued Theyre almost indestruc tible contest scene April May months hard keep up going San Diego Scale Staffel Annual interesting set Otay Mesa about mile Mexican border place alive La Migra US Immigration Naturalization officers well illegals heading north work fields California Just meet got going well moved Navy Seals parachute team could make several drops onto field Still lots great thermals lots neat Scale activity week later off Taft Taft Free Fligliter means space thermals hobnobbing lots people know what doing exactly Memorial Day weekend meet US Free Flight Championships year being number 16 great fun events almost type imaginable both Indoors Out couple non-Free Flight types put evening demonstration precision Quarter-Scale aero batics two Quadra-powered Lasers Both crashed Free Flight planes did year quality flying excellent Scale Taft always fun because have ROG rise off ground great booming thermals can place mediocre models have look fantastic Still models notably mediocre Mike Mulligans Jumbo Rubber Cranwell Parasol Loren Williams Rumpler Bipe Dick Siefrieds 54-inch Me-109 PT-19 making easy flights 1-1/2 two minutes Mulligans ship directionalstability problems last year employed Happy hint Ferrell Papic tells us rubber lube great taking Hot Stuff off fingers took top off bottle Hot Stuff internal pressure built up days heat squirted over placebut luckily eyes rubber-lubing about half hour afterwards Don Srull out spying West Coast secrets DC Maxecuters sald uses baby oil same purpose Ill have try ideas since usually wind up using sanding block 60-grit gamet paper get dang stuff off own bod Just received new Repla-Tech International aircraft catalogs two booklets can get sending $360 company 48500 McKenzie Highway Vida OR 974881 heartily recommend stuff modelers can use way Aeromodeller plans Hirsch raceplane drawings forty-cent black-andwhite snaps Golden Age racers packs color shots covering tons good subjects Tiger Moth pack features ancient brass com passes mahogany instrument panels both cockpits photo packs seem hover around average price 80 cents per snap color some have upwards 40 pictures same plane Some others have five serious about particular plane bargaln catalog descriptions worth trip Send along experiences have tiny Electric Scale jobbies well try keep gang posted Ciao Bill Warner 423 San Vicente Blvd Santa Monica CA 90402 build modern Wakefield go flying us perhaps would alter thinking whether World Competitive Russian Wakefield desIgn features Now lets take look what advanced technology has done FiB design Just remember part competition formula Ron Pol lard Great Britain has written interesting paper describing development Russian Wakefields paper presented SMAE Technical Symposium 1985 Design analysis excerpted follows Note following abbreviations DPR Delayed Prop Release VIT Variable-Incidence Tall AR Auto Rudder VIW Variable-Incidence Wing wish increase climb rate model two options open crease power use power available efficiently power available Wakefield virtually fixed energy-stor age-capacity rubber quality sec ond option open Improved efficiency means reduced drag significance means wing drag Lift drag interrelated given wing section incidence fore lift could reduced zero drag would reduce dramatically trouble theory lift model will climb unless. unless model pointed way wish go upwards steepest angle possibleverti cal practical best climb configuration need look no further designs used Power fliers So get following features WIng airfoil section should have low camber thinfive six percent aspect ratio should range moderate high 121 151 dihedral should rela tively low flat center resist turn Fuselage Short nose long tall moment arm low pylon keep model going straight resist turn Center gravIty Forward location 550/s Continued page 158 156 Model Aviation FF Scale/Warner Continued page 57

No doubt conceived during lull local fast food chain models nonetheless great flying prove once again unique materials can very successful right imagination involved EJohn Voorhees THESE TWO MODELS have flying sur faces cut lids McDonalds breakfast cartons basic parts same small body stick modifications necessary adapt design other Breakfast Special GL catapult-launched hand-launched athletic glider Breakfast Special RP pro peller-driven rubber-powered model intended low-cost projects youngsters lazy adults like group instruction fly very well out doors quite durable tolerate wind better small models lost RP models out-of-sight nice thermal flight test flying lunch hour few months ago completely stock model no special weight-reduction modifications Adult su pervision assistance should pro vided kids under 12 years unless have some previous successful model building craft experience Construction Collect four McDonalds lids airplane wish build Top Agroupof prop-driven Specialsare mass launched during aCub Scoutcontestlfl Ohio Above completed rubber-powered version Prop Sig flying surfaces youThere least two ways dothis either know-where stick 1/s-ln balsa photos author unless otherwise noted September 1986 53 Left Cutthe templates heavy stock make XActo blade cutting block described text help cut out wing accurately Right Cut fuselage hard Is-In balsa Text contains details lightening stick other modificatIons longer flight times go pig-out yourself walk around asking other customers may have carton lids Dont worry youll get used puzzled looks get special interest fact some lids obtained Anahiem CA McDonalds across street Dis neyland weighed two-thirds much obtained local Ohio area much better propellerdriven models might little weak catapult gliders wasnt able obtain enough test gliders always embarrasses wife go around asking lids best appearance lids used given model should alike Lids McDonalds Hot Cakes Big Breakfast Scrambled Eggs suitable especially careful get both lids used wings during same breakfast period reasonably sure produced same roll sheet foam may some density thickness variations between lids produced different lots quantity lids group project ask manager sell some Ohio sleeve 125 lids costme $316 1985 Kit preparation Make Xerox copy plan patterns Cut out body stick pattern carefully splice neces sary copy body stick make sure joining copies top stick makes straight line passes through splice will enable retain correct angular relationship tween wing horizontal tail number models made scout troop may want glue patterns light cardboard extra dura bility drawings show patterns should placed carton lids wing horizontal tail fin pattern should placed entirely within flat area carton lid cut wing leading edges cement shank new #11 X-Acto knife blade top smooth wood block /16-in thick Place carton lid upside down smooth kitchen counter tabletop left hand center lid hold against tabletop slide block knife blade along side lid lightly scribing cutting just tip blade Make repeated passes cut through lid cleanly along entire leading edge wing two similar carton lids Orient both printing lid can read right-side up look down wing behind trailing edge looks better way pro cedure assures uniform leading edge height /i6-in cuts except leading edge wing cut foam razor blade new hobby knife blade young kids best use scissors much safer will satisfactory job cutting foam used carefully especially careful cutting ends wings halves will joined together form dihedral joint Sand ends 54 Model Aviation Nine-year-old Amy Rosinaki shows us two several stages development propel br-driven Breakfast Special has gone through Original version left latest right built original fail 1983 wIth some help father Testing new Special author shows us proper launch technique angle P30 model plc Dick Palmer Concentration Cub Scouts face prepares reiease modei says just far piane can take young modeier necessary eliminate gaps necessary sand other edges have good-flying model slight improvement performance though can round leading edges trailing edges tail surfaces bevel wing trailing edge less 1A2-in body stick made strong -in A-grain sheet balsa Experienced builders should use medium density 7 10 lb/cu ft wood Beginners would better use Catapuit isunches can reach 50 ft before forces exceed wing strength Model also hand isunches weii youre athietic hard balsa lessens chance breakage Trace around body stick pattern onto sheeting ball-point pen cut out care using sharp hobby knife Give special attention wing slot Note differences body stick nose outline between catapult glider propeller-driven model also note bump supports rear motor hook propeller-driven model best performance appearance round edges body stick sandpaper everywhere except tail surfaces mounted reduce weight tail use sanding block taper body stick rear motor hook loca tion back thickness /i6in extreme tail end youre impatient can skip step After sanding finished may want apply coat either clear lightlycolored dope body stick im proves appearance somewhat will also reduce performance slightly due additional weight Obviously also ex tends building time too optional recommended young builders beginner groups want performance performance can reduce weight fur ther lessening vertical height body stick about above below wing Dont change angle horizontal tail though step recommended group leaders give Continued page 153 September 1986 55 Full-Size Plan Pages 86-87 Amy shows us proper technique iaunching catapuit version iength piiots arms best determines proper length catapuit rubber strip Test Pilot MACA Engineer Combat power systems analyst listing Help Wanted section latest MACA Newsletter What deal get play very latest equipment manufacturers get findings published MACA Newsletter MA too Send resume Doc Passen PO Box 111 Jasonville IN 47438 serious position dont waste Docs time some crank letter better call him instead Issues MACA Newsletter have coming out time have lots interesting articles best way join MACA sending check $10 MACA 17400 Harlem Ave Tinley Park IL 60477 Ill taking pictures MACA upcoming meets want star bring model see Charlie Johnson 3716 Ingraham St San Diego CA 92109 RC Pylon Racing/Hager Continued page 52 until know whats going Also remember no two aircraft alike must treated individuals Finally please realize above sugges tions just what works may work place start hope try will benefit Racing still going strong Tennessee reported Greg Doe Smyrna Air Races surprise store everyone year no rain Several contestants wearing raincoats carrying umbrellas pilots meeting Saturday morning can guess trying protect themselves sun Sixty-five contestants 15 states ac counted 97 entries three events Quarter Midget drew 32 entries Formula 23 Entries both events up last year Sport Pylon divided two separate matrices 19 Novices 23 Experts Quarter Midget half Formula flown Saturday balance F-I Sport Pylon Novice Expert flown Sunday QM three-way tie after five rounds settied times due frequency conflict top five Moorhead Jacobson Brue shaber Clark Bussell Best Finish F-I went Norm Johnson After five rounds regulation heats firstplace tie existed between Fred French Dave Pearce Theres name past though Dave fast time Fred managed win flyoff three-way tie also existed fourth place between Oliver Bussell McDermott John provided excitement flyoff demolished beautiful Bruce Polecat down front straightaway Sport Pylon provided some closest racing weekend Dividing Novices Experts up helped eliminate demoralizing feeling beginner experiences gets doors blown away flying against seasoned Experts Two Jims always top Sport Pylon out Jim Moorhead crashed test flight possible radio failure interference Jim Bartels didnt make contest 1986 continued tradition Pylon Racing Tennessee Another record set year support 45 fine people gave up part weekend contestants could race Which brings subject reaflirm ing Lyle Larsons comments last months newsletter NMPRA News Release Lets try become better sportsmen sport doesnt die 18 years racing Ive never wituessed volunteer unpaid race worker delib erately single out contestant either call cuts allow cuts go unreported Its difficult understand cant accept race official human being capable making honest mistake fact its contradiction contestants can cut midair crash plus number other stupid mistakes totally intolerant mistake official dont mention prima donnas think theyre incapable cutting Dont misunderstand Im saying shouldnt able ask questions No CD should object polite inquiry about some ruling call As matter fact mistakes corrected because contestants check results question call once final decision made accept results Its okay politely register complaint Sometimes will lead improvement procedure might eliminate future problem Just remember keep sportsmanship sport Results Smyrna Air Races April 26-27 1986 Sport PylonNovice 1 B West 1308 2 B Serotta 1417 3 5 Johnson 1373 4 J Wathey 1581 5 J Morton 1432 Sport PylonExpert 1 K Heatlie 1216 2 D Whiteaker 1223 3 G Jacobson 1213 4 5 Kovach 1287 5 F French 1205 Quarter Midget 1 J Moorhead 1167 2 G Jacobson 1189 3 D Brueshaber 1198 4 J Clark 1239 5 P Bussell 1169 Formula 1 F French 1136 2 D Pearce 1118 3 J Demeritte 1154 4 R Oliver 1166 5 P Bussell 1146 Greg really has some good points sportsman ship Hope see years Nats Bill Hager 706 Glen Haven Dr Conroe Th 77385 B reakfast/Voorhees Continued page 55 model chance beating built kids should safely home contest flying session before figure out what did Assembly kids doing building aliphatic resin glues such Elmers Titebond Wilhold other white watersoluble glues should used foam joints Experienced modelers regu larly use cyanoacrylate CyA adhe sives can use sparingly accelerator used stop glue dissolving foam parts tack parts together several tiny dots Zap CA hit immediately shot Zip Kicker accelerator After model fully assembled apply thin fillet white glues over complete joint set whole airplane aside dry several hours overnight Begin assembly joining wing halves center tips blocked up 1 4 1 -in above joint sure halves fit together well minimize September 1986 153 m m Co I 1 0 -1 m C z 0 0 0 C Co CD 0 z 0 z 0 C 0 -a 0 -u m m JJ 0 0 0 -I CD CD 0 0 C 0 0 CD 0 0 31 0 Bij N Q Co n CA x Ca rh x x 11 x x 0 x U .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak5495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly$795 Add $3 postage handling tirat 3 ckages 10% additional mePie474/Ua1P P0 8ox68132 AIRCRAFT CO Portland OR 97268 Ir~1I 5 4J4LuA inEKKSNIiIU mYma LUZLI BENTOM BROWN JR CAMPBELL COMET COVERITE COX DUBRO EASY BUILT MODELS ENVA FM FLYLIN Etm FOX- GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT RN MODELS- SEAGLEN SIG STERLING SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE WILLIAMS & OTHERS ESTES MODEL ROCKETS U Sead C 100 Cash Chsok o Stamps lot 44 pag tabloid Sia DISCOUNT Catalog 900 illostrations osor 700 Kits rhoose Iron IMAILORDER PI4ONEORDER IN STORE PENN VALLEY HOllY CENTER fl7 V Main St Lansdalmla 19449 L 1a nt glue needed building RP version glue nose bearing rear motor hook wrapped thread shown plans wing drying glider wrap thread around nose area reinforcement rub glue wrap ping Any type glue may used body stick apply sparingly rear plane body stick dry enough handle pin down flat piece wax paper glue vertical fm place After joint dries place straight-edge along bottom body stick tail end trim off small overhanging part vertical tail exactly line bottom body stick Next horizontal tail may pinned glued place Glue body stick vertical tail both tail surfaces may moved initial flight trimming wing center joint dry sand bottom wing will slide freely slot body stick Pin wing place fuselage apply con tinuous thin fillet glue wing meets body stick both sides top bottom Once glue has thoroughly dried glider version finished thing left to attach 6-in length -in x 042 rubber strip tied loop 6in length -in wooden dowel will serve catapult Small kids short arms may require shorter loop rubber can stretch sufficiently launch airplane propeller-driven model install 7-in plastic prop its shaft Care fully examine freewheeling notch prop hub Clean up rough edges necessary sure bent wire end will drive prop no rough edges will catch wire prop supposed freewheel Balance prop sanding hard work trimming scissors easy heavy blade Some plastic props far out balance plane will shake like wet dog climbing dont omit step Put small drop oil thrust bearing prop shaft Cut some 24-in lengths A-in x 042 rubber strip motors helpful put small metal rings motor make easier reconnect rubber rear hook once has wound can usually found fishing tackle stores can bend yourself best performance rubber should coated rubber lube can substitute liquid hand soap Armorall Apply lube lightly motor just before using first time Add modeling clay nose balances level supported fingertips placed curl leading edge wing tips Flying trimming Finally reason work have built straight lightweight plane reap reward Unless quite experienced gliders rubber-powered models refrain flying until have period calm air Evenings usually best need large open area least 100 ft clear directions glider 200 ft propeller-driven model is wind will need clear space downwind direction Dont test fly over blacktop especially glider Beginners generally make some bad launches no point breaking model unnecessarily Before flying look directly front model see body stick bent left right vertical fin angled way other rear part fin should yet glued place Bend left side centerline about Yn /16in extreme rear edge insert thin straight pin upward through bottom horizontal stab edge-wise through vertical fin will hold initial turn adjustment Once sure glider turning left can try catapult launch Hold rear end body stick vertical tail between thumb index finger right hand Extend middle finger beneath horizontal tail Hold cata pult stick left hand catch rubberband securely notch nose glider Bank glider right aim up 300 450 angle theres breeze aim Stretch rubberband hard release tail glider should climb steeply overhead roll left turn circles right climbing left offset vertical fin should increased enters vertical climb stalls drops its nose didnt stretch catapult enough launch goes up rolls left comes down fast left turn two possibilities 1 left circle smaller SOft diameter reduce left offset vertical fin /n-in try again 2 left circle seems near 50 ft larger diameter remove some nose weight try again model descends left circle continues dip up down glides add small amount clay nosejust enough barely eliminate dip Built according plan glider trim should OK subteen smaller teenage kids older fliers have longer arms can stretch out longer catapult band higher launch can achieved little bit down elevator~ provided balsa foam wedge about /i6in maximum thickness tapering nothing over 1 1 can inserted under bottom rear edge vertical fin causing horizontal stab bend downward will straighten out initial climb allow ing model go higher strong launch After adjustment made may need remove little clay nose obtain glide limit exceeded wing folds up launch dont expect get gliders 154 Model Aviation CARBIDE SCRIBER 499 HARRY ft HIGLEY soia INC PO BOX 532 GLINWOOD ILL 60425 FLAIR MODELS FROM ENGLAND BARONETTE $11995 49 Span 25-40 2 stroke 30-60 4 stroke Pre-Cut Balsa & Ply Parts Hardware Tank Spun Aluminum Cowls Dealer Order Direct Free Catalogue Available MORLEY USA 2ll8ArchdaleDrive Charlotte NC 28210 704-553-2703 THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft Cars Boats Radios eSystems Engi nes Hardware eBooks eFinishing Materials Accessories Videos OR/C Dealers Win $1000 $500 $250 R/C Merchandise retailer choice eligible simply fill Out return reader survey form issue RCBG 10th edition Winners will chosen random drawing Reader Survey participants local hobby shop does stock copies Guide picas send request payment 13 ltO plus postage/handling 3 Radio Contml Bues Gukie Clifton HouseeClifton VA 22024 * You may use VISA Mastercard charge payment sending card number expiration date order over about 50 ft high satisfied adjustments use little water-soluble glue fix rear part vertical tail horizontal tail dry can remove pin held trim adjustments Trimming prop-driven model time should have balanced model clay offset rear edge vertical fin about 6 left pinned place calm evening large open space wind lubricated motor about 150 turns launch model gentle toss direction slightly upward over 15 above horizon Ideally should proceed shallow climb turning large circle right because right thrust molded Sig plastic nose bearing descend smooth gliding turn left Adjust rear edge vertical fin no Y32 time get right climbing turn should smaller 50 ft dia can largeor large left turn dangerous condition tight turn under power turns look good climb glide begin increase power 50 added turns per flight geared winder will handy friend bent wire stooge hold prop motor wound rear Stretch rubber about 40 begin winding move continue winding winding com plete back origlnal motor length Watch fught carefully model descends fast glide remove some clay dips up down glide add some clay nose stalls climb put thin balsa shim foam wedge over Via-in thick tapering nothing over ito 1 under rear verti cal fin bend horizontal stab down plane fails climb wedge too thick both glider prop-driven models very fine adjustment can made tail surfaces sanding taper rear edges has same effect shimming offsetting surfaces subtly hope enjoy building flying models have questions com ments suggestions may call after 600 pm Eastern time 513 4928685 Partial kits including die-cut body stick detailed building instructions patterns printed card stock rubber necessary hardware may obtained quantities 10 postpaid $175 gliders $250 rubber-powered models carton lids glue thread included Fly Max mmmmmmmmmmmmmmmmm UI II MOWNG LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requiredI change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA-member subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2600 US Schools $900 US Libraries $1350 I Name II Address City/State __________________ ZIP _______ ModelAviation 1810 Samuol Morse Dr Reston VA 22090I mm mm mm mm mm mm1 September 1986 155 1429 Fox Dale P1 Sidney OH 45365 clever ruse hinging rudder letting find ____________________________________ felt happiest solve problem FF Duration/Hartill straightened out flights right winners Continued page 59 circle _________________________________________________ Top dog Peanut Clarence Mather Parnall Pixie top Junior Jeff Witt man definitely has knack Tailwind Contester Lacey Ralph Cooke put up fine flights trio Gas jobs Ian Payne slipped fine float-equipped Vultee L-1 third Gas Second Ferrell Papic tried-and-true Astro 02-powered Bleriot 7 taking top honors Bill Stromans Taube CO-2 power Its great flier new one-inch-to-the-foot Bellanca CF four cells takes Astro 02 worked marvelously extra weight really nice thing about electric can always move batteries rearward balance motor prop xeight prop Bristol slotted hub Dick Howards famous cottage-cheese-container plastic blades glued Theyre almost indestruc tible contest scene April May months hard keep up going San Diego Scale Staffel Annual interesting set Otay Mesa about mile Mexican border place alive La Migra US Immigration Naturalization officers well illegals heading north work fields California Just meet got going well moved Navy Seals parachute team could make several drops onto field Still lots great thermals lots neat Scale activity week later off Taft Taft Free Fligliter means space thermals hobnobbing lots people know what doing exactly Memorial Day weekend meet US Free Flight Championships year being number 16 great fun events almost type imaginable both Indoors Out couple non-Free Flight types put evening demonstration precision Quarter-Scale aero batics two Quadra-powered Lasers Both crashed Free Flight planes did year quality flying excellent Scale Taft always fun because have ROG rise off ground great booming thermals can place mediocre models have look fantastic Still models notably mediocre Mike Mulligans Jumbo Rubber Cranwell Parasol Loren Williams Rumpler Bipe Dick Siefrieds 54-inch Me-109 PT-19 making easy flights 1-1/2 two minutes Mulligans ship directionalstability problems last year employed Happy hint Ferrell Papic tells us rubber lube great taking Hot Stuff off fingers took top off bottle Hot Stuff internal pressure built up days heat squirted over placebut luckily eyes rubber-lubing about half hour afterwards Don Srull out spying West Coast secrets DC Maxecuters sald uses baby oil same purpose Ill have try ideas since usually wind up using sanding block 60-grit gamet paper get dang stuff off own bod Just received new Repla-Tech International aircraft catalogs two booklets can get sending $360 company 48500 McKenzie Highway Vida OR 974881 heartily recommend stuff modelers can use way Aeromodeller plans Hirsch raceplane drawings forty-cent black-andwhite snaps Golden Age racers packs color shots covering tons good subjects Tiger Moth pack features ancient brass com passes mahogany instrument panels both cockpits photo packs seem hover around average price 80 cents per snap color some have upwards 40 pictures same plane Some others have five serious about particular plane bargaln catalog descriptions worth trip Send along experiences have tiny Electric Scale jobbies well try keep gang posted Ciao Bill Warner 423 San Vicente Blvd Santa Monica CA 90402 build modern Wakefield go flying us perhaps would alter thinking whether World Competitive Russian Wakefield desIgn features Now lets take look what advanced technology has done FiB design Just remember part competition formula Ron Pol lard Great Britain has written interesting paper describing development Russian Wakefields paper presented SMAE Technical Symposium 1985 Design analysis excerpted follows Note following abbreviations DPR Delayed Prop Release VIT Variable-Incidence Tall AR Auto Rudder VIW Variable-Incidence Wing wish increase climb rate model two options open crease power use power available efficiently power available Wakefield virtually fixed energy-stor age-capacity rubber quality sec ond option open Improved efficiency means reduced drag significance means wing drag Lift drag interrelated given wing section incidence fore lift could reduced zero drag would reduce dramatically trouble theory lift model will climb unless. unless model pointed way wish go upwards steepest angle possibleverti cal practical best climb configuration need look no further designs used Power fliers So get following features WIng airfoil section should have low camber thinfive six percent aspect ratio should range moderate high 121 151 dihedral should rela tively low flat center resist turn Fuselage Short nose long tall moment arm low pylon keep model going straight resist turn Center gravIty Forward location 550/s Continued page 158 156 Model Aviation FF Scale/Warner Continued page 57