Control Line: Navy Carrier

Control Line Navy Carrier Richard Perry RECEIVE letters occasionally peo ple inquiring about whether aircraft would make good subject scale Carrier model Now can re ceive scale bonus points Profile Carrier well subject has broader appli cation Since rules changed few years ago jet prototypes have held some inter est tooconverted props pur poses course aspects consider selecting subject Carrier model Much concern ease construc tion personal preference regarding flaps ailerons etc complexity mechanisms operating will dis cuss two items month size tail volume ratio questions comments hear center around two areas personal preference model size larger side Class should 140 160 sq total wing area including fuselage Class II should 200-225 sq Some people build smaller models reduce drag improve high speed models can slightly lighter much weight Carrier model fixed engine fuel gear control system etc smaller model would have less drag proportion its wing area exact copy original isnt smaller model exposes engine engine provides significant amount drag Since lines fly 0 0 7JMARIN AT TA OKE R Supermarine Attacker first jets Royal Navy few jets suitable conversion prop power Class II Scale would accommodate fan Tail volume ratio Vt good indicator probable handling characteristics Carrier model See text details Free fighters have conscious tail volume years account least 2/3 total drag other factors such engine gear also fixed can see small effect model size has top speed Yet wing area can have significant effect slow speed ease model flies Wing area purely factor scale model built fuselage size once wing area has determined de pends proportions full-scale aircraft small fuselage cross section does necessarily mean less drag small fuselage exposes engine Continued page 95 32 Model Aviation St / NA C MAC 4____ St x~ S xMAC Pete Mazur president Navy Carrier organization formed 1977 Nats Pete pre fers MO-i designs originated Don Ger ber photo Harry Higley devoted in-depth histories several dif ferent aircraft issue accu racy articles black-andwhite color photos often previously unpublished make two magazines extremely interesting useful reading Send stamped self-addressed envelope information Historical Aviation Album PO Box 33 Temple City CA 91780 produces continuing series 8 aperbound books called Historical Aviation Al bums now up vol 15 contains several in-depth semi-technical articles aircraft personalities made aero nautical history article includes clearly written text photos fine-line 3-view scale drawings also produce several single subject books similar size format part contin uing Album series Ive found pub lications second-to-none accuracy quality 3-view drawings available separately large 17 X 22 size Got Screw Loose cowling model held place metal screws threading themselves plywood hardwood mounting blocks threads blocks tend wear out after taking screws out dozen times Hot Stuff similar cyanoacrylate adhesives can eliminate problem Its best give threads Hot Stuff treat ment during construction before model painted exposed fuel First mount engine cowl normal threading cowl mounting screws wood mounting blocks remove screws cowl Hold fuselage mounting block level hole straight down Fill threaded hole Hot Stuff let soak before tip ping level same holes Let set overnight before putting screws back holes cowl could become permanently mounted Profile Publications Most have probably heard maybe own some colorful now out-ofprint aircraft historical series printed England 1960s early 1970s series consisted 258 individual aircraft profiles subject list included virtually worlds prominent military aircraft since WW Typically Profile up 12 pages long covered subject aircrafts origin devel opment use photos color scale drawings historical text Air craft Profile series pioneered mat now see reflected other similar series different publishers recent years full-page color scale drawings Profile especially well done seem ideally suited to days generation Sport Scale models rules entire series also sold set 14 bound volumes may won der bring up since have out print several years reason some Profiles yet sold out two sources know still have good stock mentioned earlier Armed Forces Book Co can get list Big Props Available diameters up 20 in assorted pitches Top Flites new large-sized props made rock-hard straight-grained maple stated accurately bal anced Prices range $595 16-in dia meter 4-or 6-in pitch $695 18 6- 8- 10-in pitch $795 20 in 6- 8- 10-in pitch Top Flite Models Inc 1901 N Narragansett Ave Chicago IL 60639 product review product review product review what have can also get list di rectly Profile Publications Limited Dial House 6 Park St Windsor Berk shire 5L4 UU England Youd better soon PLEASE DO NOT FLY NEAR POWER LINES Mike Gretz Box 162 Montezuma IA 50171 CL Navy Carrier/Perry continued page 32 thus may increase drag important thing consider re garding fuselage size large enough hold easily equipment goes model large fuselage can built same weight smaller actually stronger summarize last few paragraphs build model large enough fly well choose subject has fuselage big enough make equipment installation easy next Class II way will have fuselage 6 inches deep 4/4 inch es wide Profile Carrier course fuselage just holds engine wing tail together everything hanging out breeze small fuselage dimensions desirable reduce weight critical factor selecting scale subject designing non-scale Profile Carrier model size loca tion horizontal tail tail must able generate enough moment stall wing can done smaller tail long distance wing larger tail set close wing factor best predicts effec tiveness horizontal tail apol ogies aeronautical engineering pro fessors extensive simplification tail volume ratio Vt Sw X MAC tail area X tail moment arm wing area X mean aerodynamic chord wing tail areas equation self-explanatory mean aerody August1978 95 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Support AMA Price $3995 GREATEST R/C BASIC TRAINE1W Design & Kit ALL TIME Ask over 25000 satisfied builders H-BAY dealers sold them- Thr nost kit per SHALL WE SAY MORE Andrews Aircraft Model Co Inc US Rte t& North Sc Topstirld Mass 01983 887-8541 dollar bar err nrndut review oroduct review oroduct review namic chord MAC non-tapered wing simply wing chord leading edge trailing edge distance tapered wing MAC located inboard mean chord chord measured half distance wing tip fuselage centerline tapered wings meas ure MAC about 45% distance fuselage centerline wing tip pure delta measure MAC 33% fuselage-tip distance tail moment arm measured tween quarter-chord points wing tail quarter-chord point point 25% back leading edge MAC surface larger tail volume ratio effective will tail Some sam ple ratios Aircraft AF2S Guardian Al H Skyraider Short Seamew MO-l AM-l Mauler A-7 Corsair II F-4 Phantom II Note higher-powered propel ler aircraft have tail volume ratios exceed ing 45 An MO-i model Vt 41 can stalled doesnt have flaps Flaps force nose down require larger tail moment compensate balance point Mauler flaps would critical model larger tail volume ratio Any Carrier model normal about half span flaps should have good handling qualities has tail volume ratio over 45 balances 10-20% MAC Without flaps Vt 40 adequate Profile models because lower power larger wings can get V 30 bal ance point 25% MAC develop ing undesirable handling qualities high speeds threw A-7 F-4 demon strate jets have tails too small make good Carrier subjects prop power Without prop nose jets dont need large tail volume stability yet Carrier model ers dont have jets workable propulsion systems just yet Most jets have engines toward aft end usually have long noses balance aircraft put heavy engine nose balance comes problem happy exception norm jet carrier aircraft Supermarine tacker see drawing Developed mid 1940s resembles conventional prop fighters time period much later jets tail quite large nose relatively short wings straight has conventional tail-wheel landing gear may tempted note fuselage circular inlet tail mold fiberglass balsa shell fuselage itself could turned lathe am doing some work throttles right now hope able report next column subjects would particularly like see column drop line Richard L Perry 5016 Angelita Ave Dayton OH 45424 CL Speed/Hempel/Upton continued page 33 piece equipment cheap multitude reasons using tach saving wear tear airplanes taching instead test flying working out engine fuel problems engine research impressing friends etc best common use Vtis check out engine see worth flying after fly compare flight time ground rpm example 29s turn 22000 ground 41will go 180 mph excellent consistency 40Given experience using tach will find test flying can reduced 26 product review product review product review High Performance Wheels Retract gear pro vides major decrease drag stallations gaping wheel well holes nullify some gain ultra thin 2/2 wheels can folded against bottom wing skin avoiding need wells can retracted flush providing circular hole skin backed up ring sheet balsa plywood Used fixed gear stead conventional thick rubber-tired wheels provide noticeable decrease drag consequent improvement perform ance nose-gear retraction thin wheels need narrow slot well Thin wheels also attractive fliers Sport Pylon Quick ie 500 Formula Hard bronze hub fits 5/52 wire does create radio noise mold ed rubber tire cannot come off $895 per pair $1340 three Green Aero Products Main Mag Building 1915 Main St Niagara Falls NY 14305 product review product review product review never eliminated some basic rules concerning taching us seem forget time time Lets review 1 Use standard fuel dont vary 2 Use standard prop 3 Wear safety glasses ear protec tion 4 Remove battery 5 Warm engine up before obtaining reading 6 Take steady state reading brief spikes isnt steady have probably got problem 7 If pipe engine always use pipe standard non-varying length 8 Use flying carburetor obey rules may get results can correlated flights Some pitfalls avoid using prop fuel considerably differ ent flying trim b using stand ard propdesignate can easily duplicated keep hanging wall c using standard fuel formula d taching airplane least once sure bench test isnt different Finally get important part article What does need tach go fast As explained before variables no can tell sure just fast should go thing certainyou can go least fast indicated chart everything else right Getting right no doubt will subject column years come Patrick Henipel design can used either B C simply balancing match either full mini-pipe con struction basswood ch 5/16 hard wing 3/16 stab cowl made solid inside cut outleaving about /8 thick shell 3/16 cap glued top As semble finished partsincluding engine pan pipewith rubberbands move wing forward backward until can balance plane level fingers little ahead monoline unit mark everything glue together epoxy Finish hobbypoxy K&B happy flying received letters Sam Burke member Canadian FAI speed team Charles Lieber mem ber American FAI speed team Sam feels speed fliers need exotic equipment well rather just working bit what already have still thinks best performance crease comes practice rather trick modification Amen Sams models loosely patterned after Emil Rumpels Kingfisher utilizing case pres sure centrifugal switch modi fied pipe Charles Liebers feeling speed fliers participat ing FAI speed have yet answer question very well FAI speed par96 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 0491051 Specialists brochure send 13C stamp Kuslom Kratlsmanship Brochure Box 2699 Laguna Hills CA 92653 714 B30-5162 COLOR POSTERS Twelve stunning 17 x22 pictures - of famous planes missiles action such B-i F-5E F-4 T-43 OV-1OA A-bA F-15 F-16 Titanil lithograph poster ideal framing hanging Only$955/set S,dChckOMouOd,To S PO BOX 458 FLUSHING NY 11352