Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103
Edition: Model Aviation - 1978/06
Page Numbers: 54, 55, 100, 101, 102, 103
Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103
Edition: Model Aviation - 1978/06
Page Numbers: 54, 55, 100, 101, 102, 103
Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103
Edition: Model Aviation - 1978/06
Page Numbers: 54, 55, 100, 101, 102, 103
Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103
Edition: Model Aviation - 1978/06
Page Numbers: 54, 55, 100, 101, 102, 103
Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103
Edition: Model Aviation - 1978/06
Page Numbers: 54, 55, 100, 101, 102, 103
Free Flight Du ration Bob Meii ser COUPE DE GAS Most free-flight events flown international competition have less-demanding junior ginner novice counterparts A-2 towline glider has A-I Wakefield has Coupe dHiver Indoor has metric Pennyplane FAI Power has ing whatsoever Bob Hatschek has notion void should filled proposes Maximum engine displacement would limited cc 0061 cu Maxi mum area wing plus stab 20 sq din 310 sq Power loading 300 g per cc 1058 oz per cc 1734 oz per cuin same current FAI Power re quirement FAI fuel required no nitro Bob suggests two categories 10-sec engine run 180 sec max 7-sec engine run 120-sec max model powered 0049 cu en gine would required weigh 85 oz would permit rather rugged con struction restriction FAI fuel necessity international event have attempted run Cox Tee Dee 049 engines FAT fuel have too successful no fundamental reason problem could licked minor engine modifications substitution maximum-area rule wing-loading requirement neat touch Since weight governed engine displacement model having K iii t2AZIOflAL QECOI2& 012t21 Ct2OPtEl2 ourboaia CAtS t Sr II 4t4t21012 bA12t2yL 5tEVEt256 / 20 i8I 7/ / jig l4icro/zte -7 / Japanese tissue /0 - 6 i8 4 6 strands turns 5 dia. siitidia 4sht small engine would have lower wing simply use AMA Gas loading therefore better glide rules event Without weight rule having maximum-size engine AMA models tend lightly built would compensate potentially quite different overall charac higher power-to-displacement ratio ter FAI models about simply larger engine applying FAT power-loading wing54 Model Aviation CO2 events what would mod els look like Possibly like Bob Meusers Telco Terror Campus Cutup Brown Boomer de pending engine used Airframe basic model pictures half weight powerplant Rather nice layout think loading rules smaller displacement engines has tried times resulting models like small FAI Power models An 049 engine allowed 187 sq built mini mum weight 85 oz required power-loading restriction 300 sq model must loaded up 137 oz Neither model appropriate stepping stone FAI Power Motor-Seigler class essentially 09 cu engine pow ered A/2 glider popular Europe being entirely different character FAI Power model also misses mark An entirely new class required Bobs specifications moment merely suggestions example sug gests maximum wing area 25 sq din 387 sq might appro priate Think over talk up tell Bob what think Address 316 Gros venor St Douglaston NY 11363 Also write free-flight representative ClAM George Xenakis 1288 Oak Knoll Dr San Jose CA 95129 Bob expects recommend inclusion event proposal ClAM agenda US item important Usually find ourselves position reacting proposals made other coun tries rather leading way Finder Please Notify took 56 years figure out two pretty good ways getting people things make easy can scarcely avoid Continued page 100 Di5card eI equaL I~tf9 untidameter equats id[#sma{{ endgf 6~om andIinar6 i{oJ l2zrge 16i roff tAeyaye Continue unti{diameter end an/ cut en oJ6oom Cut cut ~erof y/e end /ope sand beliotiK June1978 55 v Sa -e South end P-30 model.. lled 1/32 balsa sheet form made rolledup paper strips See text details od aa meter e9ua{to /ss tan i{/sma(endi 6oom I14aA fpper a6oza 3 IZnger t6an iytA f6oom Ornithopters strange begin unique giant Darryl Stevens strange among wing flappers Its biplane upper wing flaps down lower wing flaps upclapping hands speak like some birds Stevens held two national records until records zeroed January 1 Stevens pic il 1a4 4z f sbza/f end d e#e N aK4jionaf fir s/A arrefeat 6oom curveJorjara{/f sids KITS 0 PtANS 0 ACCESSORIES BABY ACEP-NUT KITS NYLON BEARINGS BROWN CO-2 ENGINES _____________________REAL JAPANESE TISSUE-PROPS 57 SPAN COMPLETE CATALOG 50t KIT $4 25 MANY HAED TO FIND ITEMS Pt*-hfywes W BOX 2498LA MESA CALIF 92041 CATALOG 25c DAVIS22 D-IK PLAN CSD-7BY Chas E Steinchak MODERNISTIC MODELS PO B0X6974ALBUQNM87107 sanding lightly after coat Markings The roundels wing placed shown plan top ones shown inboard side bottom ones shown outboard side Heres good easy way make turn out right using compass draw proper circles contact paper cut out Starting center paint area roundel winga little actual area will finished airplane cover area contact paper mask center circle Seal edges clear paint Paint next color again little larger actual roundel will cover proper mask seal edges clear paint Continue until roundel complete Leave paper until rest Spitfire painted peel off contact paper presto youve got professional job may seem faster same time just make sure put right color right circles Pain canopy light blue Add AMA numbers initials can go fuselage Paint bottom airplane light blue paint top olive tan cam ouflage colors Conclusion Both Spitfires needed back plate engine filled sol der trimmed fly May June July 1976 issues Model Aviation Chris Lella tells lot airplanes actions problems articles bal ancing roll yaw pitch control line stunt ships quite good should read control line flyer models described article both capable doing complete AMA pattern problems either have worthy addition stable aerobatic mock-combat champions 52nd Nationals continued page 53 Charles Nats has possible adds up lot enjoyment economical conditions family oriented Nats Further food thought has become harder harder put Nats due cost complexity factors much has increasing talk re cent years about discontinuing Nats changing significantly make manageable might last opportunity enjoy Nats classic tradition Lake Charles offers best combination factors make trip worthwhile ever inclined go Nats years recommended offer facilities view point Lake Charles known site country much ideally suited Nats Thus stage set once again AMA put worlds biggest model meet invited FF Duration/Meuser continued page 55 b tickle funnybones applies getting people tell about find lost models Nats Entry&Meeting Information Advance Entry mail savings big Basic Fee refundable dont show Nats best bet advance entry postmark deadline July 3 Late entries will also permitted contest site during Nats period pri mary requisite events late en tries accomplished before various stages preflight processing events con cerned accordance Nats entry form schedule particularly concerning Scale model turn-in transmitter processing Entry Form full schedule event flying plus Scale turn-in deadlines RC transmitter processing times printed Offical Nats Entry Form Instructions Anyone thinks might enter should obtain 1978 Nats entry form also includes much other useful information available upon request AMA HQ 815 Fifteenth St NW Washington DC 20005 Please include stamped pre-addressed en velope AMA HQ offices Chennault Air Base Lake Charles will open registration late entry July 30 ba sically 8 am noon 1 pm 5 pm day also noon day Indoor site Late Basic Entry Fee Juniors Sen iors $5 same advance fee includes entry event $40 Open mem bers no event included Event fees late entries events added Nats advance entrants $5 per event age categories--except RC $10 per event Mechanics Fee advance late $5 provides identification field access priv ileges equivalent contestants Nats Housing University dormitories available rate $5 per person per night double occupancy Children oc cupy bed use sleeping bag ex ample will charged NATS MEETINGS regular AMA general membership meeting provided AMA by-laws scheduled held Nats Wednesday August 2 600 pmall members invited Nominating Committee open AMA vice-presidents appointed delegates will meet Wednesday August 2 8 pm beginning meeting signals closing time AMA officer nominations President Vice-Presidents District 2 4 6 8 10 19791980 term See AMA News section issue nomination procedures NEW NATS TROPHY POLICY Awards will provided least three places Nats event Juniors Seniors well Open contestants ad dition awards may available de pending upon number advance entries event Thus 10 advance entries age group event will least five awards addition will award ten advance en tries beyond first ten Example 21 ad vance entries six awards five first 10 plus second 10 JUNIORS AND SENIORS Juniors Seniors will receive awards same manner Open adult age entries means encouraging young sters compete Nats Juniors Seniors year get free entry Nats event upon payment basic fee Thus Open contestants have pay $20 basic fee plus $3 per event $10 per RC event Juniors pay $5 basic fee no event fees unless enter event same true Seniors ex cept basic fee $10 Juniors Seniors should know too no late entry penalty fee Open entrants latter have pay $40 late entry after July 3 whereas fee stays same Juniors Seniors no matter enter over 60 events 1978 Nats can entered Juniors Seniors special policies age groups years Nats can happy experience youngsters find out ask free Nats entry formsend stamped selfaddressed envelope AMA 815 Fifteenth St NW Washington DC 20005 100 Model Aviation O ER 8O8 8 CA 088 SCALE DRA~SXa ER SON RFP TECH 45550 M KENZ t HWYV DA OR q ss HB Engines have now well accepted modeling public available ever creasing number dealers too may now enjoy RC CL FF flying power boating car racing HB Engines pre cision made power performance re liability HB Engine includes Perry carburetor several models offer PDP Perry Directional Porting increased power speed up 1500 RPMs Sizes available 12 15 20 25 40 50 61 displace ment Let HB precision maneuverability speed satisfy Baron complete catalog see local dealer write us directly make easy category re member locals possibly Joe Culver used strap self-addressed postcard wing finder model fill vital statis tics pop mailbox worked tickle funnybones depart ment have following heart-rending prose written Southern George Perryman affixed wing grand-daughter Stephanies OT/Coupe/ Unlim rubber-power model wing am pore little country girl 8 years old has slopped hawgs trapped possums toted well water git enuf monie build little model airplane want astronautt get growed up find little plane please notify According reliable sources Stephanie saw said Aw Gran-paw ah kin spell bettern Ok Steph maybe Gran-paw couldnt Ornithopter Record Good timing December II Darryl Stevens set Cate gory II Outdoor Orni record 20 days later got wiped out rules change though model conforms new rules difficult understand thinking behind perhaps merely precedent Darryl also set Category record same model two weeks earlier threeflight total 244 model strange several aspects far larger thopters thing total wing area around 400 sq biplane wings go up down unison rather lower wings flap upward upper ones flap downward clap together end stroke Although rules permit large area non-flapping wing whole thing flaps Darryls model Ornithopters supposed simulate bird flight some degree biplane bird has yet evoluted let alone claps hands come close birds clap wings upper lower extremes motion wings taking off theory about aerodynamics seriously sufficiently inter ested could probably dig out litera ture Darryls dad Curt says Darryls bird has Japanese tissue wings stretches badly wings must re-covered after about six flights know cure flight sight behold climbs angle 70 80 degrees cruises 10 15 seconds comes down like sick pigeon See Authentic bird flight simu lation Tapered Tubular Tailbooms have decided cant live tubular front end section fuselage latest AMA-Gas model Nordic glider P-30 rubber-power model have problem make tapered tubular tailboom match course could machine whittle metal wooden form proper shape wrap piece sheet balsa around can simply bend up balsa tube circular form harass taper sketch shows easier way Once have form what time honored way follows Soak balsa sheet water least 10 minutes per 1/32 thickness Longer better perhaps Some say bit ammonia water helps water penetrate wood helps soften resins wood cant vouch plain water works fine Spray-dampen piece high-wet-strength tissue such Silkspan tissue laying flat floor table top stick edge form using water stickum Wrap layer form tuck sheet balsa between tissue form continue wrapping Secure tissue place tape light spiral wrap thread put 150-degree oven hour two simply let sit around house day two Remove stuff form glue up joint presto worlds slickest tailboom June1978 101 NB ENGINES Bavarian Precision Products Co formerly Helmut Bernhardt Precision Movements Co All parts available stock pt service assured PO Box 6 New Canaan Ct 06840 20 966-8781 Dealership inquiries invited writing advertisers mention read about MA BUILDING SCALE MODEL Need airplane photos details markings refer ence documentation make task easier major source such photos cases source Send 13-cent stamp free catalog COLLECT-AIR PHOTOS Box 14234 Dept MA Milwaukee Wisconsin 53214 yours behold Getting correct sheet width wee bit hassle Multiplying pi di ameter doesnt seem get pre cisely balsa seems stretch bit rolled good starting point see balsa laps over itself rolled unwrap slice off bit try again gap talk yourself countless advantages slightly smaller boom diameter happy straight cut wrapping paper will result straight-tapered boom might imagine rather tiny bit bellied out middle usually step right direction dont worry about want pre cisely smooth transition between boom straight forward section curve edge shown sketch requires edges sheet balsa will have curved appropriately course nice feature whole caper no matter badly goof up resulting boom usually pretty neat Put seam bottom God wont notice Outstanding Performance Southern Cal Satellite fliers always doing such fantastic things hard keep straight somehow got con fused near-equal performance Scully lads mentioned earlier slipped down crack Any about year ago - Hulan Matthies posted string 20 straight maxes score 100 minutes undoubtedly highest official AMA-Gas score history call collect have news contrary wont see AMA records list Guinnesss book Undoubtedly done under SoCal VTO-is-neat rules done night besides performance doesnt qualify official AMA record Southern Cal fly-by-nighters have own criteria regarding what constitutes worthwhile pursuit According Walt Preys Satellite Hulan flying Satellite 788 early K&B Schnuerle turning K&W 10-4 fiberglass prop used K-Mart timer modded pinch-off After about tenth max quit using DT fuse since took too long set up after flight making official flight 12 minutes left him maxi mum seven minutes retrieve model dark return go again averaged about 515 flight flight engine coughed sput tered still made 505 flight lights went out after about 10 seconds Hulan used timehonored haywire system batteries flashlight bulb Hulan kept head together circled motorcycle same trajectory driven pre vious 15-or-so flights ultimately saw model cross high-beam Honda Most flights made en gine runs low side 7 sec inci dentally rumored Night Flying will proposed official event could put books starting 1980 will Sourthern Cal VTO rules current AMA rules will Categories 1 II III whats point having official status hasnt prevented event being flown whenever has interest having such event Maybe theyre al ready ahead game dont know Think THNIRT Third NIMAS Indoor Record Trials Thnirt lovingly referred its conjurers held 23rd 24th June fabulous Category II site West Baden Indiana microfilm stuff will flown 23rd quasi-outdoor eventsManhattan Formula Pennyplane Scale H L Glider suchon 24th Inexpensive meals lodging complimentary No-Doze tablets round-the-clock flying promised Send stamped self-addressed envelope Ive never understood envelope does Doc Martin 3227 Darwin St. Miami FL 33133 further details Nordic Anti-Spin Nordic towline gliders dethermalize sometimes spin wildly around vertical axis spin can result reduction sinking speed turn might result lost model certainly does enhance chances survival model upon contact Mother Earth Occasionally spinning combined looping tendency result 50% probabil ity landing tail first Some models some dont Its unpredictable George Xenakiss Nordic upon being repaired after /2A Gas model flew through did although didnt before usual fixes changes pop-up angle adding tip plates etc--didnt work recent visit Bob Hatschek sug gested cure George said Great lets try did Consider direction lift force stabilizer dethermalizing model stab going through air respectable angle must gener ate some lift lift stab can redirected counteract various symetries model no Nordic ab solutely symmetricalperhaps wtn Look model top right tip stab dethermalize position pulled back lift stab pushes tail right promoting spin left counteracting spin right Shimming dethermalizer position stab way might make model look little weird stab glide position probably doesnt affect glide trim tried it worked wasnt agreement between logical analysis gut feelings just kicks tried shims opposite direc tion wasnt clear made situa tion worse fact situtation perhaps already bad could get surely didnt help Replacement shims side logic again cured problem Rule spins left shim right tip stab forward vice versa Its infallible doesnt work try other way doesnt work try R/C - Book Preview would go about putting together book about say Indoor modeling using modern team ap proach would want expert Indoor modeler team course would want someone team relatively new sport prob lems beginner would forgot ten since how-to book someone teaching experience would helpful since best way de scribing how-to-do-its associ ated Indoor construction through use drawings better put professional illustrator team pre ferably Indoor experience Such book making team has assembled team con sists Ron Williams de scribed above Ron incidentally designed nifty Manhattan Formula indoor model appeared cover October 1977 issue Model Builder About 30 pages perhaps bootlegged 102 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L05f Specialists brochure send 13 stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 product review product review product review Alpha Designed Tom Runge 049- 09-powered RC model aimed novice sport flieran attractive durable airplane Lite plywood fuselage double spar foam wing Span 40 weight 25 oz 2 3 channels Wheel pants included Price $1995 Ace R/C Inc Box 511 E Higginsville MO 64037 product review product review product review ltecq DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDE FOROTS EVERY TIME wThe black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf GUIDE FOR I hinges drilling 3 stan yLARGE HINGESdard size holes match type 195hinge choose use BALSA PICKER \WDU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA company xerox machine boss away stapled together life real book distributed through bookstores merely through hobby shops Simon Schusterone biggies publishing business has retained Ron job sub stantial retainer fee contract thick book itself will schedule such business-like appur tenances Ron working essentially full time spies has seen some manuscript drawings judges will best model aviation book ever written No firm publication date has yet established keep eyes peeled about year Unofficial Events Its firm will Unlimited Mulvihill event US Free Flight Champs Saturdaythe same day regular N4ulvihill event 630 730 am provided weather suitable flight unlimited max AMA rules except models must weigh least 20 grams rubber No Pennyplanes Awards will presented top three Junior Senior Open flier having highest time will receive coveted Bob Meuser Memorial Trophy replaced permanent trophy upon its return next year Lets see what big Mulvis will really Although Cargo has erased Nats menu bring Cargo model along anyhow Doug Joyce will record-holding model will have something measure perfor mance against Bob Meuser 4200 Gregory St Oak land CA 94619 FF Sport Scale/Warner continued page 57 north Philadelphia not-to-be-missed premiere will take place may well biggest scale contest ever held CD Lin Reichel expects possibly 200 300 models basis pre-contest regis trations cant make person theyll try get someone proxy-fly Classes Flying Aces Rubber Scale Peanut Scale Jumbo Scale FAC Power Scale gas C02 electric combined bonus points C02 electric NoCal Profile AMA Rubber Scale Thomp son Trophy Race WW combat WW II combat Embryo Endurance Contact Lin Reichel Erie Model Aircraft Assn 3301 Cindy Lane Erie PA 16506 Dope Addicts Only mourn passing Banana Oil local paint store discontinued last week answer model doping problem nitrate dope Unless doing glow engines butyrate pain empen nage some aircraft supply stores can still score nitrate bargain-basement prices us out country however price $400/qt including postage isnt too outrageous plasti cised dope shrink flat flying surfaces Available Bob El lington United Modellers 2913 Edwards Ave Bakersfield CA 93306 last everif dont make Y4-scale Bonzos TWA Thermal-Worthy List would like put together list proven ther mal-worthy rubber scale ships have plane now just fond mem ory having claimed thermal did over say two minutes Lets share some information other modelers Send name ship wing span approximate weight flight time other data think might useful such wing area prop used rubber size type etc 5 X 7 photo good contrast un cluttered background would fantastic necessary probably lost fore took picture anyway too Rigged Ken Johnson sug gests using surgical silk fine rig ging job According Ken smooth ness surface no tiny hairs bristling out cuts drag significantly standard silk thread great improve ment over using over-the-counter cotton polyester Compare Note cyano acrylate sticks silk thread like Gang Bus ters June1978 103