Radio Control Soaring Byron Blakeslee CONGRATULATIONS new F3B team Steve Work Albuquerque NM Rich Spicer San Jose CA Steve Lewis Santa Ana CA Alternate members Larry Jolly Seth Dawson German-made King Spicer-developed Synergy dominated finals Two Kings three Synergys top five total seven Kings four Synergys out 17 contestants 1987 F3B World Championships will held Achmer Airport near Osnabruck nortwest corner Germany far Bre men date July 24-August 2 1987 Contest Director will Hans-Joachim Kunze late Dan Pruss have FAI jury member will replaced either Geoff Dalimer Sandy Pimenoff 86 Nats several people asked going replace Dan MAs Soaring contributing editor answered No nobody can replace Danbut Ill try continue doing column best can Others wondered column-writer needed some kind Rock Star answer course proved contest emphatic No qualification know ing send copy Column content will determined whatyou ask about and/or send Apropos thought Barry Kurath news letter editor Portland Area Sailplane Society sent copy excellent hi-monthly Please keep em coming Barry letter good suggestions Quoting part Barrys letter Enjoyed section Thornburgs Rules River Air article legendary dont know magazine published its about time reprinted club members prefer hard information almed various levels skill experience Construction tips trends design trimming airplanes new products some favorite subjects Contest reports good include data photos airplanes rather Joe Blow won long flights accurate landings other words like anything can use make flying better fun Thanks thoughts Barry couldnt agree can come up kind material regular basis column should satisfy its objectives way homework Ive reread ing Dans old columns Luckily never throw away MA magazines believe Dans objectives too Since publication AMA feel special respon sibility try serve AMA Sailplaners So keep cards letters photos newsletters coming recognition appreciation fine job did hosting F3B finals months Club Month Minnesota RC Soaring Society receive hearty Well done lot work other hand members reward seeing meeting top fliers country always fun can great learning experi ence finals CD Bob Sealy also club president used edit MRCSS excellent newsletter An all-around guy Other club ficers Dale Eason Tim Thomas John Borlaug Ross Swenson current editor kind enough send photos Ross writes club now has 102 members skill levels interests represented fly Thermal Slope Electrics Just shows popular various facets Soaring John Borlaugs Weird fantastic flier sure strange see flying backwards really irks some people beaten airplane doesnt know way fly Weird canard design New Jerseys Dick Sarpolus appeared conWinner MRCSS Building Contest John Borlaug scratchbuiit Weird 11 -year-oid design Dick Sarpoius Flying Models pians fiies great Photos Swenson MA has featured some Sarpolus powered canard designs recent years Germanys Robbe Model Sport company makes great fine kits Frank Heinrich L its US general manager seen displaying few Sailpiane kits front New Jersey office/warehouse Robbes newfourmeter1 575-in-span ASW 17 Royal seen right Modei features alierons fiaps spoilers plura piastic fuselage precovered fiying surfaces Soid direct see coiumn phone no 54 Model Aviation Joe Jan Wurtswerethe winning team Santa Maria Soaring Societys sixth nual cross-sountrycontest Theycompleted full 26-mile triangular course nearCali fornia Valley CA two days meet Photo Bill Doose struction article June 1975 issue Flying Models magazine BR would like see sweeping changes F3Blike elimination ballast changes tween tasks maybe dropping Speed task need get people involved Thanks Ross club info thoughts F3B people concur should some way get bigger involvement F3B far hasnt happened now appears F3B very real crossroads Either its appeal broadened itll become extinct having ideas subject invited write well kick around possible solutions Sailplane trim following piece Ian Turner appeared newsletter October 1986s Club Month South Bay Soaring Society example stuff John Dvorak prints Silent Flyer think well-written significant article cause trimming can such vexing problem listening various flying sessions have heard lot different remarks made having trim Sailplane Statements like Youve really got keep plane moving haul back trim really floats typical have sensed occasions defin ing best trim setting well-understood thing article Ive tried explain options resulting effects open us Let deal briefly CG location aerodynamic performance point view CG location has second-order effect such things sink speed glide ratio Providing CG ahead center Continued page 148 Windeong kit-maker Bob Dodgson must proud MRCSS Team Windsong because of NSS hardware collected team made up L R Ross Swenson Steve Bowman Kent Rogers Photo Swenson FAI RUBBER Sizes 1/43/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber nde add $150 UPS Over$l5add 10% MEW e rebber classIcs P30 prep Air Express MinI-Peagl Crecket hoeks Frent miii assembles 3 Prep kits Stanluster Satellites winders hardware leeks mere ZONA SAWS famous line hobby saws Razor#200 $255 Universal #500 Saw set #100 $450 Replacement Blades available dealer Send $100 1986 Cataiog F Mo del Supply December 1986 55 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 Njer ltlPEANUT SCALE Piper Vagabond Piper Cub Stinson 125 Outdoor kits each. $650 Light Indoor kits each. 3605 PEANUT hid IIdle. $605 SPORT SCALE PC-S Porter Taylor Craft jr- Stinson Voyager Rubber CO2 Power PC-S ParlorKits each. $750 SPORT MODELS An Embryo Model 18 Span designed win beginners experts . $750 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 5595 True Olde Japanese Tissue 10 3 colors . Japanese Tissue t2 6 colors 3395 Microlite Plain3325 Silver5395 Microfilm 3375 Glue 3160 Solvent Condenser Paper 3 sheets 375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thrs 085each 3175 3/32 tliru 5/32each 3195 Winder 61 395 Mail 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3150 P0 eox 3967 Torrance CA 90610 DO YOU HATE TO INSTALL HINGES st exciting product introduced R/C Fieid * Ref iects its name easy hinges instail * A Single Siot Few Drops C/A Giue Gouging Pinning Hinge Pins worry about 1 * Dont iet smail size fool theyre Incredibly Strong * Virtuaily Indestructibie Designed 1/2 Thru Giant Scale * Demonstrated major RC Modei Shows * Available Hobby Dealer 24 EASY HiNrcs $295 c: EASY HINGSTM 137 N Pacifsc St Suite DSan Marcos Ca 92069 Radio Technique/Myers Continued page 51 ailerons made plane lean little tried elevators power available enough loop tapped rudderand got 2 snap rolls before could get thumb back started adrenalin flowing Time land set ttle tried trim descent fell like rock After few attempts landed full back-stick about 80% throttle ending landing roll right feet spectators thought flies good Little did know Joe went modify airplane until flew like other always wished hadnt wanted keep plane aroundjust visiting hot shot pilots try seriously intend help someone learn fly RC should spend some time flying own airplane badly Out trim Push trims way end practice making Figure Eights crossing time point convenient cloud sky make some takeoffs landings still out trim good training preparation next student will show up plane cant trimmed flight Next same thing CG moved back until airplane almost unflyable CG moved far forward can barely take off good training teaches recognizeand deal withthe kind problems will face Just record have flown airplanes CG out front wing werent canards have flown CG behind 50% point much fun faced new model dont know should balance try 20% behind wing leading edge its biplane 20% behind leading edge top wing have dual-rate controls practice dual rate set minimum simulate in-flight failure servo Guess got idea prefer have too much control available first flights set up pushrods much possible within reason Beginners usually set up too little control dont know just Get throttle right before first flight best friend can throttle will kill engine command cant remember students have presented brand new engine brand new airplane would loop low throttle plus low trim keep doing New engines wont idle nervous student shuts off receiverjust before launching plane always produces crash has happened three times 30 years hate gadgets put switch inside airplane leave guess whether wire should pulled out pushed fly really must train ourselves wiggle control stick watch control surfaces respond before flight have train students same way Insist really believe should flying redundant radios Ive talking about last couple months wont happen until some manufacturers start offering packaged redundant systems Ask Ask dealer dont stock redundant radios Write manufacturers ask same question Theyll sell anything will buy well safer hope have found piece entertaining has started thinking about respon sibility accept offer become Instructor Pilot writing has worthwhile George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 RC Aerobatics/Van Putte Continued page 53 way went means 101 dB two times noise 94dB What does prove Maybe equipment needed calibrated often Perhaps engine different noise level weather hot cool Possibly operators read noise level wrong Ill interested hear what Howard Crispin Chairman AMA Sound Committee has say about sound measure ments 1986 Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Blakeslee Continued page 55 pressure wing plane will stable As CG moved farther forward stability increases stab must now work harder harder keep nose up PYLON FREE FLIGHT UC SPEED RACING COMBAT EPOXY-GLASS PROPS CONTINUOUS LENGTH AS LOW AS $125 EA FREE BROCHURE Div Pops Prop,IncJ// 709 Crescent Sunnyside WA 98944 509-837-5983 S aVO Old TII11qg 1niwteS RepfO6uctOIt P@~ IOV ee BENTOM N JR CAMPBELL IGENE DUBOIS GUILLOW- K&B- K&S L R st this. OMET- COVERITE COX DUBRO BUILT MODELS FAt INE FOX- GOLDBERG-GOLDEN AGE REPROspa PERFECT MAX PACTRA PECK-POLYMER R/N MODELS SEAGL STERLING- SULLIVAN R TIGRE TAFFINDER TELCO FLITE- TREXLERI WILLIAMS & OTHERS IESTES MODEL ROCKETSI II S.id $100 ie Cesh Check Stamps ition tabloid sire DISCOUNT Catalog tstationsover 700 Kits choose IEngine IMAILORDER PHONEORDER IN STOREI PENN VALLEY HOBBY CENTER IOver 600 items U7 W Main t LansdalslaAUI4I $200 current catalog 148 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunhird 10 Sunbird Jr youll find Sunhird perfect sport plane 3fl P RECISKN PROIUCTS INC 714 592-5144 511 E Arrow Highway San Dimas CA 91773 ~2NALS Byrons Best Buys Direct Save ship within 24 hrs Retail Factory Pipe Dream Trainer$19700 $13995 Ducted Fan Jet Kits Retail F-16 Fighting Falcon41100 A-4 Skyhawk45000 F-86 D Sabre Jet43000 F-86 H Sabre Jet42000 MiG-iS45000 F-15 Eagle98700 BD-5J42300 Scale Warbird Kits P-Si Mustang5090036025 P-47 Thunderbolt5360037950 A6M5 Zero4940035000 F4U-1 Corsair4790033900 Aerobatics Biplane Kits Deluxe Pitts40600 Christen Eagle35000 Staggerwing G-17S54400 CAP 2130400 Glasair TD35300 Beechcraft Kits Beechcraft Baron 5854000 V-35B Bonanza24600 F-33A Bonanza26500 A-36 Bonanza27500 T-34B28200 T-34C30000 Shipping $1000 Engines/Propulsion Systems Retail $37800 28995 16350 25882 39995 Shipping $ 300 300 300 300 300 results higher drag So message locate CG far back possible introducing instability personal matter depends skill flying style much anything else Having found comfortable CG position can use trim controls transmit ter best advantage Lets just run through observable effects go very underelevated stall point begin pushing trim stick hard forward model flies fast comes down fast wing made operate very low angle attack its drag lowest Unfortunately lift resulting lift/drag ratio being poor As trim control moved back plane slows down its angle descent reduces some point glide angle reaches its flattest model still flying quite fast near stalled condition point called best liftto-drag ratio Interestingly point minimum sink because although glide angle flattest model flying quite fast down glide slope However point maximum distance coverage therefore trim use trying distance moving between thermals As trim moved back further flying speed reduces glide angle increases Just before stall wing its highest angle attack can shown plane condition minimum energydissipation hence minimum sink can shown mathematically key parameter CI/Cdcoefficients lift drag Cito power 15 divided Cd maximized sink lowest confusing things about condi tion glide angle may appear much worse optimum can give illusion high sink have fallen pitfall suggest try timed flights two launches day too much thermal activity trimmed best glide angle just off stall difference may high 25% better forthe near-stalled condition list trim pointers follows 1 glide angle particular trim independent wing loading loaded model will fly faster along same glide path lightly loaded 2 cleaner model greater will difference between trim flattest glide trim minimum sink 3 lowest ghde angle best distance ie thermal-hunting 4 lowest-sink condition best thermal 5 CG position mostly affects stability glide performance should far back comfortable control point Im sure some saying yourselves What no mention Reynolds numbers Well usual Reynolds number effects can completely upset above state ments will make some remarks Since flying speed can greatly different between minimum sink best glide ratio possible very clean model such Aquila Grande operating sufficiently fast best glide angle performance airfoil improved significantly business trip opportunity stop Belle Mead NJ meet Frank Heinrich general manager Robbe Model Sports US operation Robbe name may familiar American Sailplaners have growing line gliders think will interest range fliers beginners experts Robbe large manufacturer sorts toys Germany produces extensive line power planes gliders cars especially boats plus sorts accessories togo company has 300 employees 10% engaged developing new products now finishing up new items will introduced very important Nuremburg Toy Fairin 1988 Robbe does its own manufacturing includ ing blow-molded fuselages foam injectionmolded balsa-covered wings little accessories foregoing until recently did apply radios made Futaba now Robbe coming Out its own radios ranging simple computer-controlled super-sophisticated sets will spell out owners name transmitters liquid crystal display general Robbe gliders different construction normal American allwood wood/foam/fiberglass-type kits first thing youll notice high degree prefabrication fact everything pre formed covered assembled drilled etc especially nice beginners because have best chance complete perfectly-aligned good-flying plane getting discouraged December 1986 149 Factory Byro-Jet Ducted Fan Performance FactoryShipping Package w/OS 77$28000 29550105005 77 Engine21495 319001000Quadra 40 Engine13500 305001000Quadra 50 Engine22000 297501000Quadra 80 Engine set up CD 319001000 Ign less flywheel ig.30000 699003000PurrrPowr w/Q50 Engine 299501000 Super Quiet boosted power3600029000500 PurrrPowr Muffler Mount 1500 Quadra 50112007920300 1300NEW Powr Prop 4 Blade 1300 w/Sachs 42 CD Ignition 1600 mount6990054815500 NEW Powr Prop 3 Blade 287501500 w/Sachs 42 CD Ignition 247501500 mount6850053815500 385001000Byro Jet Ducted Fan less engine82005850300 214501000 249951000Finishing Materials Accessories stock wide variety finishing materials accessories well other related hobby items competitive prices 3822510 00 174501000Shipping costs UPS 48 contiguous states AK HI overseas call 188001000for shipping costs Prices subject change notice 194501000 -mKTh MasterCard Visa Welcome 199501000 212851000 MjtL-. L detailed info pack kit send $200 complete Catalog send $300 Byron Originals Box 279 Grove IA 51445 12 364-3165 iltUaif 1111 RIIIIU Horizon Model Inc ad run october issue run error Horizon Model Inc. instructed us run ad due changes some kit materials An error part caused ad incorrect information included Oc tober sorry problems caused advertiser some customers SUCCESS iSears experience no fable jrepresenting OPS just hard work nes parts Thats success See CR5 Engines Local Hobby Shop Parts People Com~eeaekw 9mio44 9#c PO Box 26247 Orleans LA 70186 42-5967 middle difficult construction project good example philosophy RC Start kit introduced Toledo year could take 945-in-span kit twochannel radio darkest Borneo go flying has Robbes usual blow-molded Plura un breakable glueable paintable plastic fuselage almost-finished Jedelsky-airfoil wing glue decals sanding sealer hardware lead nose weight sandpaper paintbrushand two screwdrivers Theres no paint sealed natural-color balsa surfaces perfectly OK goodies have cost $129 list price someone limited time experience investment well-justified latest Sailplane Robbe other end spectrum Its new four-meterspan 157 inches semi-scale ASW 17 Royal has 1054 sq area resulting average chord 67 aspect ratio 235 Ritz airfoil section spoilers flaps ailerons kit also has prefabricated compo nents lots nice hardware Flying four-meter ship something requires bit experience Make lot experience list price $299 puts serious investment category have done will tell flying big plane thrill lifetime box too big UPS its best call number given below arrange shipping between two planes Robbe has range stralght-wingers others slope WANNA RACE LLL BEGINNER RACES r 0* FORM-i * FAI Instructions b Programs Information Contact NORTH EAST PYLoN RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 thermal flying particularly appeals 60-in-span flying wing called Geier has small amount sweepback almost constant chordthe outer 10 leading edge sweeps little successful flying-wing Sail plane kit market said good less-experienced pilots has built-up wing construction elevons Plura podtype fuselage hold workings As other Robbe glider kits can converted electric power Robbe supplies through dealers electric stuff required including very popular Automax 21 charger thats Bob Kopskis department brand new 380-page catalog send $3 Robbe Model Sport 180 Township Line Rd Belle Mead NJ 08502 telephone number 201 359-2115 Id like end month hint sent RAMS member Deral Carson Dayton OH Very much enjoyed article MAs September issue Its always good see review basics once such Thornburgs Rules may would like add rule list will likely apply us high-starters though watch chute find out whats going gliders altitude location As exit launch keep eye chute Sometimes can lift strong enough keep chute suspended however other times can down-air strong enough collapse chute drop line pile Occasionally lift will draw chute particular direction watching chute fall also get idea went dont spend time looking flying like flying like Carl Goldbergs Gentle Lady Some day Im going try something else modified winglets described MAs May 1980 issue now has very-muchimproved penetration best sink rate Thanks Deral Rule merrier Speaking merry have good Christ mas lets hoe Santa brings Soaring goodies list Byron Blakeslee 3134 Winnebago Dr Sedalia CO 80135 RC Scale/Wischers Continued page 57 notch Clamp blocks vise aluminum tube wire already started pull vise-grip plier aluminum will squeeze down tightly around music wire core case notched groove must quite smooth lines will show up soft aluminum No matter made streamlined flying landing wires really something enhance appearance large Scale bipe saga has good travel year Wischers began soon after Toledo annual trip Paris FAT meetings during also visited Musee de lAir Le Bourget ailport French National Auto Museum Mulhouse headed south Italy short social call Cesare Milani former World Champion CL Scale home shores Lake Maggiore Returning northward tour through Switzerland stopped fly electric-powered Sailplane Hansruedi Zeller member Swiss RC Scale team return flight Luxembourg Chicago way Iceland After few weeks home again departed eastward Underwood home Reston VA base operations June Bealton Scale contest also made quick visit National Air Space Museum view Continued page 152 150 Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$695 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$495 Ready Fly$795 Add $3 postage handling first 2 packages 10% additional P0 8ox68132 AIRCRAFT CO Portland OR 97268
Edition: Model Aviation - 1986/12
Page Numbers: 54, 55, 148, 149, 150
Radio Control Soaring Byron Blakeslee CONGRATULATIONS new F3B team Steve Work Albuquerque NM Rich Spicer San Jose CA Steve Lewis Santa Ana CA Alternate members Larry Jolly Seth Dawson German-made King Spicer-developed Synergy dominated finals Two Kings three Synergys top five total seven Kings four Synergys out 17 contestants 1987 F3B World Championships will held Achmer Airport near Osnabruck nortwest corner Germany far Bre men date July 24-August 2 1987 Contest Director will Hans-Joachim Kunze late Dan Pruss have FAI jury member will replaced either Geoff Dalimer Sandy Pimenoff 86 Nats several people asked going replace Dan MAs Soaring contributing editor answered No nobody can replace Danbut Ill try continue doing column best can Others wondered column-writer needed some kind Rock Star answer course proved contest emphatic No qualification know ing send copy Column content will determined whatyou ask about and/or send Apropos thought Barry Kurath news letter editor Portland Area Sailplane Society sent copy excellent hi-monthly Please keep em coming Barry letter good suggestions Quoting part Barrys letter Enjoyed section Thornburgs Rules River Air article legendary dont know magazine published its about time reprinted club members prefer hard information almed various levels skill experience Construction tips trends design trimming airplanes new products some favorite subjects Contest reports good include data photos airplanes rather Joe Blow won long flights accurate landings other words like anything can use make flying better fun Thanks thoughts Barry couldnt agree can come up kind material regular basis column should satisfy its objectives way homework Ive reread ing Dans old columns Luckily never throw away MA magazines believe Dans objectives too Since publication AMA feel special respon sibility try serve AMA Sailplaners So keep cards letters photos newsletters coming recognition appreciation fine job did hosting F3B finals months Club Month Minnesota RC Soaring Society receive hearty Well done lot work other hand members reward seeing meeting top fliers country always fun can great learning experi ence finals CD Bob Sealy also club president used edit MRCSS excellent newsletter An all-around guy Other club ficers Dale Eason Tim Thomas John Borlaug Ross Swenson current editor kind enough send photos Ross writes club now has 102 members skill levels interests represented fly Thermal Slope Electrics Just shows popular various facets Soaring John Borlaugs Weird fantastic flier sure strange see flying backwards really irks some people beaten airplane doesnt know way fly Weird canard design New Jerseys Dick Sarpolus appeared conWinner MRCSS Building Contest John Borlaug scratchbuiit Weird 11 -year-oid design Dick Sarpoius Flying Models pians fiies great Photos Swenson MA has featured some Sarpolus powered canard designs recent years Germanys Robbe Model Sport company makes great fine kits Frank Heinrich L its US general manager seen displaying few Sailpiane kits front New Jersey office/warehouse Robbes newfourmeter1 575-in-span ASW 17 Royal seen right Modei features alierons fiaps spoilers plura piastic fuselage precovered fiying surfaces Soid direct see coiumn phone no 54 Model Aviation Joe Jan Wurtswerethe winning team Santa Maria Soaring Societys sixth nual cross-sountrycontest Theycompleted full 26-mile triangular course nearCali fornia Valley CA two days meet Photo Bill Doose struction article June 1975 issue Flying Models magazine BR would like see sweeping changes F3Blike elimination ballast changes tween tasks maybe dropping Speed task need get people involved Thanks Ross club info thoughts F3B people concur should some way get bigger involvement F3B far hasnt happened now appears F3B very real crossroads Either its appeal broadened itll become extinct having ideas subject invited write well kick around possible solutions Sailplane trim following piece Ian Turner appeared newsletter October 1986s Club Month South Bay Soaring Society example stuff John Dvorak prints Silent Flyer think well-written significant article cause trimming can such vexing problem listening various flying sessions have heard lot different remarks made having trim Sailplane Statements like Youve really got keep plane moving haul back trim really floats typical have sensed occasions defin ing best trim setting well-understood thing article Ive tried explain options resulting effects open us Let deal briefly CG location aerodynamic performance point view CG location has second-order effect such things sink speed glide ratio Providing CG ahead center Continued page 148 Windeong kit-maker Bob Dodgson must proud MRCSS Team Windsong because of NSS hardware collected team made up L R Ross Swenson Steve Bowman Kent Rogers Photo Swenson FAI RUBBER Sizes 1/43/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber nde add $150 UPS Over$l5add 10% MEW e rebber classIcs P30 prep Air Express MinI-Peagl Crecket hoeks Frent miii assembles 3 Prep kits Stanluster Satellites winders hardware leeks mere ZONA SAWS famous line hobby saws Razor#200 $255 Universal #500 Saw set #100 $450 Replacement Blades available dealer Send $100 1986 Cataiog F Mo del Supply December 1986 55 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 Njer ltlPEANUT SCALE Piper Vagabond Piper Cub Stinson 125 Outdoor kits each. $650 Light Indoor kits each. 3605 PEANUT hid IIdle. $605 SPORT SCALE PC-S Porter Taylor Craft jr- Stinson Voyager Rubber CO2 Power PC-S ParlorKits each. $750 SPORT MODELS An Embryo Model 18 Span designed win beginners experts . $750 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 5595 True Olde Japanese Tissue 10 3 colors . Japanese Tissue t2 6 colors 3395 Microlite Plain3325 Silver5395 Microfilm 3375 Glue 3160 Solvent Condenser Paper 3 sheets 375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thrs 085each 3175 3/32 tliru 5/32each 3195 Winder 61 395 Mail 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3150 P0 eox 3967 Torrance CA 90610 DO YOU HATE TO INSTALL HINGES st exciting product introduced R/C Fieid * Ref iects its name easy hinges instail * A Single Siot Few Drops C/A Giue Gouging Pinning Hinge Pins worry about 1 * Dont iet smail size fool theyre Incredibly Strong * Virtuaily Indestructibie Designed 1/2 Thru Giant Scale * Demonstrated major RC Modei Shows * Available Hobby Dealer 24 EASY HiNrcs $295 c: EASY HINGSTM 137 N Pacifsc St Suite DSan Marcos Ca 92069 Radio Technique/Myers Continued page 51 ailerons made plane lean little tried elevators power available enough loop tapped rudderand got 2 snap rolls before could get thumb back started adrenalin flowing Time land set ttle tried trim descent fell like rock After few attempts landed full back-stick about 80% throttle ending landing roll right feet spectators thought flies good Little did know Joe went modify airplane until flew like other always wished hadnt wanted keep plane aroundjust visiting hot shot pilots try seriously intend help someone learn fly RC should spend some time flying own airplane badly Out trim Push trims way end practice making Figure Eights crossing time point convenient cloud sky make some takeoffs landings still out trim good training preparation next student will show up plane cant trimmed flight Next same thing CG moved back until airplane almost unflyable CG moved far forward can barely take off good training teaches recognizeand deal withthe kind problems will face Just record have flown airplanes CG out front wing werent canards have flown CG behind 50% point much fun faced new model dont know should balance try 20% behind wing leading edge its biplane 20% behind leading edge top wing have dual-rate controls practice dual rate set minimum simulate in-flight failure servo Guess got idea prefer have too much control available first flights set up pushrods much possible within reason Beginners usually set up too little control dont know just Get throttle right before first flight best friend can throttle will kill engine command cant remember students have presented brand new engine brand new airplane would loop low throttle plus low trim keep doing New engines wont idle nervous student shuts off receiverjust before launching plane always produces crash has happened three times 30 years hate gadgets put switch inside airplane leave guess whether wire should pulled out pushed fly really must train ourselves wiggle control stick watch control surfaces respond before flight have train students same way Insist really believe should flying redundant radios Ive talking about last couple months wont happen until some manufacturers start offering packaged redundant systems Ask Ask dealer dont stock redundant radios Write manufacturers ask same question Theyll sell anything will buy well safer hope have found piece entertaining has started thinking about respon sibility accept offer become Instructor Pilot writing has worthwhile George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 RC Aerobatics/Van Putte Continued page 53 way went means 101 dB two times noise 94dB What does prove Maybe equipment needed calibrated often Perhaps engine different noise level weather hot cool Possibly operators read noise level wrong Ill interested hear what Howard Crispin Chairman AMA Sound Committee has say about sound measure ments 1986 Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Blakeslee Continued page 55 pressure wing plane will stable As CG moved farther forward stability increases stab must now work harder harder keep nose up PYLON FREE FLIGHT UC SPEED RACING COMBAT EPOXY-GLASS PROPS CONTINUOUS LENGTH AS LOW AS $125 EA FREE BROCHURE Div Pops Prop,IncJ// 709 Crescent Sunnyside WA 98944 509-837-5983 S aVO Old TII11qg 1niwteS RepfO6uctOIt P@~ IOV ee BENTOM N JR CAMPBELL IGENE DUBOIS GUILLOW- K&B- K&S L R st this. OMET- COVERITE COX DUBRO BUILT MODELS FAt INE FOX- GOLDBERG-GOLDEN AGE REPROspa PERFECT MAX PACTRA PECK-POLYMER R/N MODELS SEAGL STERLING- SULLIVAN R TIGRE TAFFINDER TELCO FLITE- TREXLERI WILLIAMS & OTHERS IESTES MODEL ROCKETSI II S.id $100 ie Cesh Check Stamps ition tabloid sire DISCOUNT Catalog tstationsover 700 Kits choose IEngine IMAILORDER PHONEORDER IN STOREI PENN VALLEY HOBBY CENTER IOver 600 items U7 W Main t LansdalslaAUI4I $200 current catalog 148 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunhird 10 Sunbird Jr youll find Sunhird perfect sport plane 3fl P RECISKN PROIUCTS INC 714 592-5144 511 E Arrow Highway San Dimas CA 91773 ~2NALS Byrons Best Buys Direct Save ship within 24 hrs Retail Factory Pipe Dream Trainer$19700 $13995 Ducted Fan Jet Kits Retail F-16 Fighting Falcon41100 A-4 Skyhawk45000 F-86 D Sabre Jet43000 F-86 H Sabre Jet42000 MiG-iS45000 F-15 Eagle98700 BD-5J42300 Scale Warbird Kits P-Si Mustang5090036025 P-47 Thunderbolt5360037950 A6M5 Zero4940035000 F4U-1 Corsair4790033900 Aerobatics Biplane Kits Deluxe Pitts40600 Christen Eagle35000 Staggerwing G-17S54400 CAP 2130400 Glasair TD35300 Beechcraft Kits Beechcraft Baron 5854000 V-35B Bonanza24600 F-33A Bonanza26500 A-36 Bonanza27500 T-34B28200 T-34C30000 Shipping $1000 Engines/Propulsion Systems Retail $37800 28995 16350 25882 39995 Shipping $ 300 300 300 300 300 results higher drag So message locate CG far back possible introducing instability personal matter depends skill flying style much anything else Having found comfortable CG position can use trim controls transmit ter best advantage Lets just run through observable effects go very underelevated stall point begin pushing trim stick hard forward model flies fast comes down fast wing made operate very low angle attack its drag lowest Unfortunately lift resulting lift/drag ratio being poor As trim control moved back plane slows down its angle descent reduces some point glide angle reaches its flattest model still flying quite fast near stalled condition point called best liftto-drag ratio Interestingly point minimum sink because although glide angle flattest model flying quite fast down glide slope However point maximum distance coverage therefore trim use trying distance moving between thermals As trim moved back further flying speed reduces glide angle increases Just before stall wing its highest angle attack can shown plane condition minimum energydissipation hence minimum sink can shown mathematically key parameter CI/Cdcoefficients lift drag Cito power 15 divided Cd maximized sink lowest confusing things about condi tion glide angle may appear much worse optimum can give illusion high sink have fallen pitfall suggest try timed flights two launches day too much thermal activity trimmed best glide angle just off stall difference may high 25% better forthe near-stalled condition list trim pointers follows 1 glide angle particular trim independent wing loading loaded model will fly faster along same glide path lightly loaded 2 cleaner model greater will difference between trim flattest glide trim minimum sink 3 lowest ghde angle best distance ie thermal-hunting 4 lowest-sink condition best thermal 5 CG position mostly affects stability glide performance should far back comfortable control point Im sure some saying yourselves What no mention Reynolds numbers Well usual Reynolds number effects can completely upset above state ments will make some remarks Since flying speed can greatly different between minimum sink best glide ratio possible very clean model such Aquila Grande operating sufficiently fast best glide angle performance airfoil improved significantly business trip opportunity stop Belle Mead NJ meet Frank Heinrich general manager Robbe Model Sports US operation Robbe name may familiar American Sailplaners have growing line gliders think will interest range fliers beginners experts Robbe large manufacturer sorts toys Germany produces extensive line power planes gliders cars especially boats plus sorts accessories togo company has 300 employees 10% engaged developing new products now finishing up new items will introduced very important Nuremburg Toy Fairin 1988 Robbe does its own manufacturing includ ing blow-molded fuselages foam injectionmolded balsa-covered wings little accessories foregoing until recently did apply radios made Futaba now Robbe coming Out its own radios ranging simple computer-controlled super-sophisticated sets will spell out owners name transmitters liquid crystal display general Robbe gliders different construction normal American allwood wood/foam/fiberglass-type kits first thing youll notice high degree prefabrication fact everything pre formed covered assembled drilled etc especially nice beginners because have best chance complete perfectly-aligned good-flying plane getting discouraged December 1986 149 Factory Byro-Jet Ducted Fan Performance FactoryShipping Package w/OS 77$28000 29550105005 77 Engine21495 319001000Quadra 40 Engine13500 305001000Quadra 50 Engine22000 297501000Quadra 80 Engine set up CD 319001000 Ign less flywheel ig.30000 699003000PurrrPowr w/Q50 Engine 299501000 Super Quiet boosted power3600029000500 PurrrPowr Muffler Mount 1500 Quadra 50112007920300 1300NEW Powr Prop 4 Blade 1300 w/Sachs 42 CD Ignition 1600 mount6990054815500 NEW Powr Prop 3 Blade 287501500 w/Sachs 42 CD Ignition 247501500 mount6850053815500 385001000Byro Jet Ducted Fan less engine82005850300 214501000 249951000Finishing Materials Accessories stock wide variety finishing materials accessories well other related hobby items competitive prices 3822510 00 174501000Shipping costs UPS 48 contiguous states AK HI overseas call 188001000for shipping costs Prices subject change notice 194501000 -mKTh MasterCard Visa Welcome 199501000 212851000 MjtL-. L detailed info pack kit send $200 complete Catalog send $300 Byron Originals Box 279 Grove IA 51445 12 364-3165 iltUaif 1111 RIIIIU Horizon Model Inc ad run october issue run error Horizon Model Inc. instructed us run ad due changes some kit materials An error part caused ad incorrect information included Oc tober sorry problems caused advertiser some customers SUCCESS iSears experience no fable jrepresenting OPS just hard work nes parts Thats success See CR5 Engines Local Hobby Shop Parts People Com~eeaekw 9mio44 9#c PO Box 26247 Orleans LA 70186 42-5967 middle difficult construction project good example philosophy RC Start kit introduced Toledo year could take 945-in-span kit twochannel radio darkest Borneo go flying has Robbes usual blow-molded Plura un breakable glueable paintable plastic fuselage almost-finished Jedelsky-airfoil wing glue decals sanding sealer hardware lead nose weight sandpaper paintbrushand two screwdrivers Theres no paint sealed natural-color balsa surfaces perfectly OK goodies have cost $129 list price someone limited time experience investment well-justified latest Sailplane Robbe other end spectrum Its new four-meterspan 157 inches semi-scale ASW 17 Royal has 1054 sq area resulting average chord 67 aspect ratio 235 Ritz airfoil section spoilers flaps ailerons kit also has prefabricated compo nents lots nice hardware Flying four-meter ship something requires bit experience Make lot experience list price $299 puts serious investment category have done will tell flying big plane thrill lifetime box too big UPS its best call number given below arrange shipping between two planes Robbe has range stralght-wingers others slope WANNA RACE LLL BEGINNER RACES r 0* FORM-i * FAI Instructions b Programs Information Contact NORTH EAST PYLoN RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 thermal flying particularly appeals 60-in-span flying wing called Geier has small amount sweepback almost constant chordthe outer 10 leading edge sweeps little successful flying-wing Sail plane kit market said good less-experienced pilots has built-up wing construction elevons Plura podtype fuselage hold workings As other Robbe glider kits can converted electric power Robbe supplies through dealers electric stuff required including very popular Automax 21 charger thats Bob Kopskis department brand new 380-page catalog send $3 Robbe Model Sport 180 Township Line Rd Belle Mead NJ 08502 telephone number 201 359-2115 Id like end month hint sent RAMS member Deral Carson Dayton OH Very much enjoyed article MAs September issue Its always good see review basics once such Thornburgs Rules may would like add rule list will likely apply us high-starters though watch chute find out whats going gliders altitude location As exit launch keep eye chute Sometimes can lift strong enough keep chute suspended however other times can down-air strong enough collapse chute drop line pile Occasionally lift will draw chute particular direction watching chute fall also get idea went dont spend time looking flying like flying like Carl Goldbergs Gentle Lady Some day Im going try something else modified winglets described MAs May 1980 issue now has very-muchimproved penetration best sink rate Thanks Deral Rule merrier Speaking merry have good Christ mas lets hoe Santa brings Soaring goodies list Byron Blakeslee 3134 Winnebago Dr Sedalia CO 80135 RC Scale/Wischers Continued page 57 notch Clamp blocks vise aluminum tube wire already started pull vise-grip plier aluminum will squeeze down tightly around music wire core case notched groove must quite smooth lines will show up soft aluminum No matter made streamlined flying landing wires really something enhance appearance large Scale bipe saga has good travel year Wischers began soon after Toledo annual trip Paris FAT meetings during also visited Musee de lAir Le Bourget ailport French National Auto Museum Mulhouse headed south Italy short social call Cesare Milani former World Champion CL Scale home shores Lake Maggiore Returning northward tour through Switzerland stopped fly electric-powered Sailplane Hansruedi Zeller member Swiss RC Scale team return flight Luxembourg Chicago way Iceland After few weeks home again departed eastward Underwood home Reston VA base operations June Bealton Scale contest also made quick visit National Air Space Museum view Continued page 152 150 Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$695 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$495 Ready Fly$795 Add $3 postage handling first 2 packages 10% additional P0 8ox68132 AIRCRAFT CO Portland OR 97268
Edition: Model Aviation - 1986/12
Page Numbers: 54, 55, 148, 149, 150
Radio Control Soaring Byron Blakeslee CONGRATULATIONS new F3B team Steve Work Albuquerque NM Rich Spicer San Jose CA Steve Lewis Santa Ana CA Alternate members Larry Jolly Seth Dawson German-made King Spicer-developed Synergy dominated finals Two Kings three Synergys top five total seven Kings four Synergys out 17 contestants 1987 F3B World Championships will held Achmer Airport near Osnabruck nortwest corner Germany far Bre men date July 24-August 2 1987 Contest Director will Hans-Joachim Kunze late Dan Pruss have FAI jury member will replaced either Geoff Dalimer Sandy Pimenoff 86 Nats several people asked going replace Dan MAs Soaring contributing editor answered No nobody can replace Danbut Ill try continue doing column best can Others wondered column-writer needed some kind Rock Star answer course proved contest emphatic No qualification know ing send copy Column content will determined whatyou ask about and/or send Apropos thought Barry Kurath news letter editor Portland Area Sailplane Society sent copy excellent hi-monthly Please keep em coming Barry letter good suggestions Quoting part Barrys letter Enjoyed section Thornburgs Rules River Air article legendary dont know magazine published its about time reprinted club members prefer hard information almed various levels skill experience Construction tips trends design trimming airplanes new products some favorite subjects Contest reports good include data photos airplanes rather Joe Blow won long flights accurate landings other words like anything can use make flying better fun Thanks thoughts Barry couldnt agree can come up kind material regular basis column should satisfy its objectives way homework Ive reread ing Dans old columns Luckily never throw away MA magazines believe Dans objectives too Since publication AMA feel special respon sibility try serve AMA Sailplaners So keep cards letters photos newsletters coming recognition appreciation fine job did hosting F3B finals months Club Month Minnesota RC Soaring Society receive hearty Well done lot work other hand members reward seeing meeting top fliers country always fun can great learning experi ence finals CD Bob Sealy also club president used edit MRCSS excellent newsletter An all-around guy Other club ficers Dale Eason Tim Thomas John Borlaug Ross Swenson current editor kind enough send photos Ross writes club now has 102 members skill levels interests represented fly Thermal Slope Electrics Just shows popular various facets Soaring John Borlaugs Weird fantastic flier sure strange see flying backwards really irks some people beaten airplane doesnt know way fly Weird canard design New Jerseys Dick Sarpolus appeared conWinner MRCSS Building Contest John Borlaug scratchbuiit Weird 11 -year-oid design Dick Sarpoius Flying Models pians fiies great Photos Swenson MA has featured some Sarpolus powered canard designs recent years Germanys Robbe Model Sport company makes great fine kits Frank Heinrich L its US general manager seen displaying few Sailpiane kits front New Jersey office/warehouse Robbes newfourmeter1 575-in-span ASW 17 Royal seen right Modei features alierons fiaps spoilers plura piastic fuselage precovered fiying surfaces Soid direct see coiumn phone no 54 Model Aviation Joe Jan Wurtswerethe winning team Santa Maria Soaring Societys sixth nual cross-sountrycontest Theycompleted full 26-mile triangular course nearCali fornia Valley CA two days meet Photo Bill Doose struction article June 1975 issue Flying Models magazine BR would like see sweeping changes F3Blike elimination ballast changes tween tasks maybe dropping Speed task need get people involved Thanks Ross club info thoughts F3B people concur should some way get bigger involvement F3B far hasnt happened now appears F3B very real crossroads Either its appeal broadened itll become extinct having ideas subject invited write well kick around possible solutions Sailplane trim following piece Ian Turner appeared newsletter October 1986s Club Month South Bay Soaring Society example stuff John Dvorak prints Silent Flyer think well-written significant article cause trimming can such vexing problem listening various flying sessions have heard lot different remarks made having trim Sailplane Statements like Youve really got keep plane moving haul back trim really floats typical have sensed occasions defin ing best trim setting well-understood thing article Ive tried explain options resulting effects open us Let deal briefly CG location aerodynamic performance point view CG location has second-order effect such things sink speed glide ratio Providing CG ahead center Continued page 148 Windeong kit-maker Bob Dodgson must proud MRCSS Team Windsong because of NSS hardware collected team made up L R Ross Swenson Steve Bowman Kent Rogers Photo Swenson FAI RUBBER Sizes 1/43/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber nde add $150 UPS Over$l5add 10% MEW e rebber classIcs P30 prep Air Express MinI-Peagl Crecket hoeks Frent miii assembles 3 Prep kits Stanluster Satellites winders hardware leeks mere ZONA SAWS famous line hobby saws Razor#200 $255 Universal #500 Saw set #100 $450 Replacement Blades available dealer Send $100 1986 Cataiog F Mo del Supply December 1986 55 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 Njer ltlPEANUT SCALE Piper Vagabond Piper Cub Stinson 125 Outdoor kits each. $650 Light Indoor kits each. 3605 PEANUT hid IIdle. $605 SPORT SCALE PC-S Porter Taylor Craft jr- Stinson Voyager Rubber CO2 Power PC-S ParlorKits each. $750 SPORT MODELS An Embryo Model 18 Span designed win beginners experts . $750 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 5595 True Olde Japanese Tissue 10 3 colors . Japanese Tissue t2 6 colors 3395 Microlite Plain3325 Silver5395 Microfilm 3375 Glue 3160 Solvent Condenser Paper 3 sheets 375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thrs 085each 3175 3/32 tliru 5/32each 3195 Winder 61 395 Mail 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3150 P0 eox 3967 Torrance CA 90610 DO YOU HATE TO INSTALL HINGES st exciting product introduced R/C Fieid * Ref iects its name easy hinges instail * A Single Siot Few Drops C/A Giue Gouging Pinning Hinge Pins worry about 1 * Dont iet smail size fool theyre Incredibly Strong * Virtuaily Indestructibie Designed 1/2 Thru Giant Scale * Demonstrated major RC Modei Shows * Available Hobby Dealer 24 EASY HiNrcs $295 c: EASY HINGSTM 137 N Pacifsc St Suite DSan Marcos Ca 92069 Radio Technique/Myers Continued page 51 ailerons made plane lean little tried elevators power available enough loop tapped rudderand got 2 snap rolls before could get thumb back started adrenalin flowing Time land set ttle tried trim descent fell like rock After few attempts landed full back-stick about 80% throttle ending landing roll right feet spectators thought flies good Little did know Joe went modify airplane until flew like other always wished hadnt wanted keep plane aroundjust visiting hot shot pilots try seriously intend help someone learn fly RC should spend some time flying own airplane badly Out trim Push trims way end practice making Figure Eights crossing time point convenient cloud sky make some takeoffs landings still out trim good training preparation next student will show up plane cant trimmed flight Next same thing CG moved back until airplane almost unflyable CG moved far forward can barely take off good training teaches recognizeand deal withthe kind problems will face Just record have flown airplanes CG out front wing werent canards have flown CG behind 50% point much fun faced new model dont know should balance try 20% behind wing leading edge its biplane 20% behind leading edge top wing have dual-rate controls practice dual rate set minimum simulate in-flight failure servo Guess got idea prefer have too much control available first flights set up pushrods much possible within reason Beginners usually set up too little control dont know just Get throttle right before first flight best friend can throttle will kill engine command cant remember students have presented brand new engine brand new airplane would loop low throttle plus low trim keep doing New engines wont idle nervous student shuts off receiverjust before launching plane always produces crash has happened three times 30 years hate gadgets put switch inside airplane leave guess whether wire should pulled out pushed fly really must train ourselves wiggle control stick watch control surfaces respond before flight have train students same way Insist really believe should flying redundant radios Ive talking about last couple months wont happen until some manufacturers start offering packaged redundant systems Ask Ask dealer dont stock redundant radios Write manufacturers ask same question Theyll sell anything will buy well safer hope have found piece entertaining has started thinking about respon sibility accept offer become Instructor Pilot writing has worthwhile George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 RC Aerobatics/Van Putte Continued page 53 way went means 101 dB two times noise 94dB What does prove Maybe equipment needed calibrated often Perhaps engine different noise level weather hot cool Possibly operators read noise level wrong Ill interested hear what Howard Crispin Chairman AMA Sound Committee has say about sound measure ments 1986 Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Blakeslee Continued page 55 pressure wing plane will stable As CG moved farther forward stability increases stab must now work harder harder keep nose up PYLON FREE FLIGHT UC SPEED RACING COMBAT EPOXY-GLASS PROPS CONTINUOUS LENGTH AS LOW AS $125 EA FREE BROCHURE Div Pops Prop,IncJ// 709 Crescent Sunnyside WA 98944 509-837-5983 S aVO Old TII11qg 1niwteS RepfO6uctOIt P@~ IOV ee BENTOM N JR CAMPBELL IGENE DUBOIS GUILLOW- K&B- K&S L R st this. OMET- COVERITE COX DUBRO BUILT MODELS FAt INE FOX- GOLDBERG-GOLDEN AGE REPROspa PERFECT MAX PACTRA PECK-POLYMER R/N MODELS SEAGL STERLING- SULLIVAN R TIGRE TAFFINDER TELCO FLITE- TREXLERI WILLIAMS & OTHERS IESTES MODEL ROCKETSI II S.id $100 ie Cesh Check Stamps ition tabloid sire DISCOUNT Catalog tstationsover 700 Kits choose IEngine IMAILORDER PHONEORDER IN STOREI PENN VALLEY HOBBY CENTER IOver 600 items U7 W Main t LansdalslaAUI4I $200 current catalog 148 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunhird 10 Sunbird Jr youll find Sunhird perfect sport plane 3fl P RECISKN PROIUCTS INC 714 592-5144 511 E Arrow Highway San Dimas CA 91773 ~2NALS Byrons Best Buys Direct Save ship within 24 hrs Retail Factory Pipe Dream Trainer$19700 $13995 Ducted Fan Jet Kits Retail F-16 Fighting Falcon41100 A-4 Skyhawk45000 F-86 D Sabre Jet43000 F-86 H Sabre Jet42000 MiG-iS45000 F-15 Eagle98700 BD-5J42300 Scale Warbird Kits P-Si Mustang5090036025 P-47 Thunderbolt5360037950 A6M5 Zero4940035000 F4U-1 Corsair4790033900 Aerobatics Biplane Kits Deluxe Pitts40600 Christen Eagle35000 Staggerwing G-17S54400 CAP 2130400 Glasair TD35300 Beechcraft Kits Beechcraft Baron 5854000 V-35B Bonanza24600 F-33A Bonanza26500 A-36 Bonanza27500 T-34B28200 T-34C30000 Shipping $1000 Engines/Propulsion Systems Retail $37800 28995 16350 25882 39995 Shipping $ 300 300 300 300 300 results higher drag So message locate CG far back possible introducing instability personal matter depends skill flying style much anything else Having found comfortable CG position can use trim controls transmit ter best advantage Lets just run through observable effects go very underelevated stall point begin pushing trim stick hard forward model flies fast comes down fast wing made operate very low angle attack its drag lowest Unfortunately lift resulting lift/drag ratio being poor As trim control moved back plane slows down its angle descent reduces some point glide angle reaches its flattest model still flying quite fast near stalled condition point called best liftto-drag ratio Interestingly point minimum sink because although glide angle flattest model flying quite fast down glide slope However point maximum distance coverage therefore trim use trying distance moving between thermals As trim moved back further flying speed reduces glide angle increases Just before stall wing its highest angle attack can shown plane condition minimum energydissipation hence minimum sink can shown mathematically key parameter CI/Cdcoefficients lift drag Cito power 15 divided Cd maximized sink lowest confusing things about condi tion glide angle may appear much worse optimum can give illusion high sink have fallen pitfall suggest try timed flights two launches day too much thermal activity trimmed best glide angle just off stall difference may high 25% better forthe near-stalled condition list trim pointers follows 1 glide angle particular trim independent wing loading loaded model will fly faster along same glide path lightly loaded 2 cleaner model greater will difference between trim flattest glide trim minimum sink 3 lowest ghde angle best distance ie thermal-hunting 4 lowest-sink condition best thermal 5 CG position mostly affects stability glide performance should far back comfortable control point Im sure some saying yourselves What no mention Reynolds numbers Well usual Reynolds number effects can completely upset above state ments will make some remarks Since flying speed can greatly different between minimum sink best glide ratio possible very clean model such Aquila Grande operating sufficiently fast best glide angle performance airfoil improved significantly business trip opportunity stop Belle Mead NJ meet Frank Heinrich general manager Robbe Model Sports US operation Robbe name may familiar American Sailplaners have growing line gliders think will interest range fliers beginners experts Robbe large manufacturer sorts toys Germany produces extensive line power planes gliders cars especially boats plus sorts accessories togo company has 300 employees 10% engaged developing new products now finishing up new items will introduced very important Nuremburg Toy Fairin 1988 Robbe does its own manufacturing includ ing blow-molded fuselages foam injectionmolded balsa-covered wings little accessories foregoing until recently did apply radios made Futaba now Robbe coming Out its own radios ranging simple computer-controlled super-sophisticated sets will spell out owners name transmitters liquid crystal display general Robbe gliders different construction normal American allwood wood/foam/fiberglass-type kits first thing youll notice high degree prefabrication fact everything pre formed covered assembled drilled etc especially nice beginners because have best chance complete perfectly-aligned good-flying plane getting discouraged December 1986 149 Factory Byro-Jet Ducted Fan Performance FactoryShipping Package w/OS 77$28000 29550105005 77 Engine21495 319001000Quadra 40 Engine13500 305001000Quadra 50 Engine22000 297501000Quadra 80 Engine set up CD 319001000 Ign less flywheel ig.30000 699003000PurrrPowr w/Q50 Engine 299501000 Super Quiet boosted power3600029000500 PurrrPowr Muffler Mount 1500 Quadra 50112007920300 1300NEW Powr Prop 4 Blade 1300 w/Sachs 42 CD Ignition 1600 mount6990054815500 NEW Powr Prop 3 Blade 287501500 w/Sachs 42 CD Ignition 247501500 mount6850053815500 385001000Byro Jet Ducted Fan less engine82005850300 214501000 249951000Finishing Materials Accessories stock wide variety finishing materials accessories well other related hobby items competitive prices 3822510 00 174501000Shipping costs UPS 48 contiguous states AK HI overseas call 188001000for shipping costs Prices subject change notice 194501000 -mKTh MasterCard Visa Welcome 199501000 212851000 MjtL-. L detailed info pack kit send $200 complete Catalog send $300 Byron Originals Box 279 Grove IA 51445 12 364-3165 iltUaif 1111 RIIIIU Horizon Model Inc ad run october issue run error Horizon Model Inc. instructed us run ad due changes some kit materials An error part caused ad incorrect information included Oc tober sorry problems caused advertiser some customers SUCCESS iSears experience no fable jrepresenting OPS just hard work nes parts Thats success See CR5 Engines Local Hobby Shop Parts People Com~eeaekw 9mio44 9#c PO Box 26247 Orleans LA 70186 42-5967 middle difficult construction project good example philosophy RC Start kit introduced Toledo year could take 945-in-span kit twochannel radio darkest Borneo go flying has Robbes usual blow-molded Plura un breakable glueable paintable plastic fuselage almost-finished Jedelsky-airfoil wing glue decals sanding sealer hardware lead nose weight sandpaper paintbrushand two screwdrivers Theres no paint sealed natural-color balsa surfaces perfectly OK goodies have cost $129 list price someone limited time experience investment well-justified latest Sailplane Robbe other end spectrum Its new four-meterspan 157 inches semi-scale ASW 17 Royal has 1054 sq area resulting average chord 67 aspect ratio 235 Ritz airfoil section spoilers flaps ailerons kit also has prefabricated compo nents lots nice hardware Flying four-meter ship something requires bit experience Make lot experience list price $299 puts serious investment category have done will tell flying big plane thrill lifetime box too big UPS its best call number given below arrange shipping between two planes Robbe has range stralght-wingers others slope WANNA RACE LLL BEGINNER RACES r 0* FORM-i * FAI Instructions b Programs Information Contact NORTH EAST PYLoN RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 thermal flying particularly appeals 60-in-span flying wing called Geier has small amount sweepback almost constant chordthe outer 10 leading edge sweeps little successful flying-wing Sail plane kit market said good less-experienced pilots has built-up wing construction elevons Plura podtype fuselage hold workings As other Robbe glider kits can converted electric power Robbe supplies through dealers electric stuff required including very popular Automax 21 charger thats Bob Kopskis department brand new 380-page catalog send $3 Robbe Model Sport 180 Township Line Rd Belle Mead NJ 08502 telephone number 201 359-2115 Id like end month hint sent RAMS member Deral Carson Dayton OH Very much enjoyed article MAs September issue Its always good see review basics once such Thornburgs Rules may would like add rule list will likely apply us high-starters though watch chute find out whats going gliders altitude location As exit launch keep eye chute Sometimes can lift strong enough keep chute suspended however other times can down-air strong enough collapse chute drop line pile Occasionally lift will draw chute particular direction watching chute fall also get idea went dont spend time looking flying like flying like Carl Goldbergs Gentle Lady Some day Im going try something else modified winglets described MAs May 1980 issue now has very-muchimproved penetration best sink rate Thanks Deral Rule merrier Speaking merry have good Christ mas lets hoe Santa brings Soaring goodies list Byron Blakeslee 3134 Winnebago Dr Sedalia CO 80135 RC Scale/Wischers Continued page 57 notch Clamp blocks vise aluminum tube wire already started pull vise-grip plier aluminum will squeeze down tightly around music wire core case notched groove must quite smooth lines will show up soft aluminum No matter made streamlined flying landing wires really something enhance appearance large Scale bipe saga has good travel year Wischers began soon after Toledo annual trip Paris FAT meetings during also visited Musee de lAir Le Bourget ailport French National Auto Museum Mulhouse headed south Italy short social call Cesare Milani former World Champion CL Scale home shores Lake Maggiore Returning northward tour through Switzerland stopped fly electric-powered Sailplane Hansruedi Zeller member Swiss RC Scale team return flight Luxembourg Chicago way Iceland After few weeks home again departed eastward Underwood home Reston VA base operations June Bealton Scale contest also made quick visit National Air Space Museum view Continued page 152 150 Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$695 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$495 Ready Fly$795 Add $3 postage handling first 2 packages 10% additional P0 8ox68132 AIRCRAFT CO Portland OR 97268
Edition: Model Aviation - 1986/12
Page Numbers: 54, 55, 148, 149, 150
Radio Control Soaring Byron Blakeslee CONGRATULATIONS new F3B team Steve Work Albuquerque NM Rich Spicer San Jose CA Steve Lewis Santa Ana CA Alternate members Larry Jolly Seth Dawson German-made King Spicer-developed Synergy dominated finals Two Kings three Synergys top five total seven Kings four Synergys out 17 contestants 1987 F3B World Championships will held Achmer Airport near Osnabruck nortwest corner Germany far Bre men date July 24-August 2 1987 Contest Director will Hans-Joachim Kunze late Dan Pruss have FAI jury member will replaced either Geoff Dalimer Sandy Pimenoff 86 Nats several people asked going replace Dan MAs Soaring contributing editor answered No nobody can replace Danbut Ill try continue doing column best can Others wondered column-writer needed some kind Rock Star answer course proved contest emphatic No qualification know ing send copy Column content will determined whatyou ask about and/or send Apropos thought Barry Kurath news letter editor Portland Area Sailplane Society sent copy excellent hi-monthly Please keep em coming Barry letter good suggestions Quoting part Barrys letter Enjoyed section Thornburgs Rules River Air article legendary dont know magazine published its about time reprinted club members prefer hard information almed various levels skill experience Construction tips trends design trimming airplanes new products some favorite subjects Contest reports good include data photos airplanes rather Joe Blow won long flights accurate landings other words like anything can use make flying better fun Thanks thoughts Barry couldnt agree can come up kind material regular basis column should satisfy its objectives way homework Ive reread ing Dans old columns Luckily never throw away MA magazines believe Dans objectives too Since publication AMA feel special respon sibility try serve AMA Sailplaners So keep cards letters photos newsletters coming recognition appreciation fine job did hosting F3B finals months Club Month Minnesota RC Soaring Society receive hearty Well done lot work other hand members reward seeing meeting top fliers country always fun can great learning experi ence finals CD Bob Sealy also club president used edit MRCSS excellent newsletter An all-around guy Other club ficers Dale Eason Tim Thomas John Borlaug Ross Swenson current editor kind enough send photos Ross writes club now has 102 members skill levels interests represented fly Thermal Slope Electrics Just shows popular various facets Soaring John Borlaugs Weird fantastic flier sure strange see flying backwards really irks some people beaten airplane doesnt know way fly Weird canard design New Jerseys Dick Sarpolus appeared conWinner MRCSS Building Contest John Borlaug scratchbuiit Weird 11 -year-oid design Dick Sarpoius Flying Models pians fiies great Photos Swenson MA has featured some Sarpolus powered canard designs recent years Germanys Robbe Model Sport company makes great fine kits Frank Heinrich L its US general manager seen displaying few Sailpiane kits front New Jersey office/warehouse Robbes newfourmeter1 575-in-span ASW 17 Royal seen right Modei features alierons fiaps spoilers plura piastic fuselage precovered fiying surfaces Soid direct see coiumn phone no 54 Model Aviation Joe Jan Wurtswerethe winning team Santa Maria Soaring Societys sixth nual cross-sountrycontest Theycompleted full 26-mile triangular course nearCali fornia Valley CA two days meet Photo Bill Doose struction article June 1975 issue Flying Models magazine BR would like see sweeping changes F3Blike elimination ballast changes tween tasks maybe dropping Speed task need get people involved Thanks Ross club info thoughts F3B people concur should some way get bigger involvement F3B far hasnt happened now appears F3B very real crossroads Either its appeal broadened itll become extinct having ideas subject invited write well kick around possible solutions Sailplane trim following piece Ian Turner appeared newsletter October 1986s Club Month South Bay Soaring Society example stuff John Dvorak prints Silent Flyer think well-written significant article cause trimming can such vexing problem listening various flying sessions have heard lot different remarks made having trim Sailplane Statements like Youve really got keep plane moving haul back trim really floats typical have sensed occasions defin ing best trim setting well-understood thing article Ive tried explain options resulting effects open us Let deal briefly CG location aerodynamic performance point view CG location has second-order effect such things sink speed glide ratio Providing CG ahead center Continued page 148 Windeong kit-maker Bob Dodgson must proud MRCSS Team Windsong because of NSS hardware collected team made up L R Ross Swenson Steve Bowman Kent Rogers Photo Swenson FAI RUBBER Sizes 1/43/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber nde add $150 UPS Over$l5add 10% MEW e rebber classIcs P30 prep Air Express MinI-Peagl Crecket hoeks Frent miii assembles 3 Prep kits Stanluster Satellites winders hardware leeks mere ZONA SAWS famous line hobby saws Razor#200 $255 Universal #500 Saw set #100 $450 Replacement Blades available dealer Send $100 1986 Cataiog F Mo del Supply December 1986 55 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 Njer ltlPEANUT SCALE Piper Vagabond Piper Cub Stinson 125 Outdoor kits each. $650 Light Indoor kits each. 3605 PEANUT hid IIdle. $605 SPORT SCALE PC-S Porter Taylor Craft jr- Stinson Voyager Rubber CO2 Power PC-S ParlorKits each. $750 SPORT MODELS An Embryo Model 18 Span designed win beginners experts . $750 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 5595 True Olde Japanese Tissue 10 3 colors . Japanese Tissue t2 6 colors 3395 Microlite Plain3325 Silver5395 Microfilm 3375 Glue 3160 Solvent Condenser Paper 3 sheets 375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thrs 085each 3175 3/32 tliru 5/32each 3195 Winder 61 395 Mail 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3150 P0 eox 3967 Torrance CA 90610 DO YOU HATE TO INSTALL HINGES st exciting product introduced R/C Fieid * Ref iects its name easy hinges instail * A Single Siot Few Drops C/A Giue Gouging Pinning Hinge Pins worry about 1 * Dont iet smail size fool theyre Incredibly Strong * Virtuaily Indestructibie Designed 1/2 Thru Giant Scale * Demonstrated major RC Modei Shows * Available Hobby Dealer 24 EASY HiNrcs $295 c: EASY HINGSTM 137 N Pacifsc St Suite DSan Marcos Ca 92069 Radio Technique/Myers Continued page 51 ailerons made plane lean little tried elevators power available enough loop tapped rudderand got 2 snap rolls before could get thumb back started adrenalin flowing Time land set ttle tried trim descent fell like rock After few attempts landed full back-stick about 80% throttle ending landing roll right feet spectators thought flies good Little did know Joe went modify airplane until flew like other always wished hadnt wanted keep plane aroundjust visiting hot shot pilots try seriously intend help someone learn fly RC should spend some time flying own airplane badly Out trim Push trims way end practice making Figure Eights crossing time point convenient cloud sky make some takeoffs landings still out trim good training preparation next student will show up plane cant trimmed flight Next same thing CG moved back until airplane almost unflyable CG moved far forward can barely take off good training teaches recognizeand deal withthe kind problems will face Just record have flown airplanes CG out front wing werent canards have flown CG behind 50% point much fun faced new model dont know should balance try 20% behind wing leading edge its biplane 20% behind leading edge top wing have dual-rate controls practice dual rate set minimum simulate in-flight failure servo Guess got idea prefer have too much control available first flights set up pushrods much possible within reason Beginners usually set up too little control dont know just Get throttle right before first flight best friend can throttle will kill engine command cant remember students have presented brand new engine brand new airplane would loop low throttle plus low trim keep doing New engines wont idle nervous student shuts off receiverjust before launching plane always produces crash has happened three times 30 years hate gadgets put switch inside airplane leave guess whether wire should pulled out pushed fly really must train ourselves wiggle control stick watch control surfaces respond before flight have train students same way Insist really believe should flying redundant radios Ive talking about last couple months wont happen until some manufacturers start offering packaged redundant systems Ask Ask dealer dont stock redundant radios Write manufacturers ask same question Theyll sell anything will buy well safer hope have found piece entertaining has started thinking about respon sibility accept offer become Instructor Pilot writing has worthwhile George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 RC Aerobatics/Van Putte Continued page 53 way went means 101 dB two times noise 94dB What does prove Maybe equipment needed calibrated often Perhaps engine different noise level weather hot cool Possibly operators read noise level wrong Ill interested hear what Howard Crispin Chairman AMA Sound Committee has say about sound measure ments 1986 Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Blakeslee Continued page 55 pressure wing plane will stable As CG moved farther forward stability increases stab must now work harder harder keep nose up PYLON FREE FLIGHT UC SPEED RACING COMBAT EPOXY-GLASS PROPS CONTINUOUS LENGTH AS LOW AS $125 EA FREE BROCHURE Div Pops Prop,IncJ// 709 Crescent Sunnyside WA 98944 509-837-5983 S aVO Old TII11qg 1niwteS RepfO6uctOIt P@~ IOV ee BENTOM N JR CAMPBELL IGENE DUBOIS GUILLOW- K&B- K&S L R st this. OMET- COVERITE COX DUBRO BUILT MODELS FAt INE FOX- GOLDBERG-GOLDEN AGE REPROspa PERFECT MAX PACTRA PECK-POLYMER R/N MODELS SEAGL STERLING- SULLIVAN R TIGRE TAFFINDER TELCO FLITE- TREXLERI WILLIAMS & OTHERS IESTES MODEL ROCKETSI II S.id $100 ie Cesh Check Stamps ition tabloid sire DISCOUNT Catalog tstationsover 700 Kits choose IEngine IMAILORDER PHONEORDER IN STOREI PENN VALLEY HOBBY CENTER IOver 600 items U7 W Main t LansdalslaAUI4I $200 current catalog 148 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunhird 10 Sunbird Jr youll find Sunhird perfect sport plane 3fl P RECISKN PROIUCTS INC 714 592-5144 511 E Arrow Highway San Dimas CA 91773 ~2NALS Byrons Best Buys Direct Save ship within 24 hrs Retail Factory Pipe Dream Trainer$19700 $13995 Ducted Fan Jet Kits Retail F-16 Fighting Falcon41100 A-4 Skyhawk45000 F-86 D Sabre Jet43000 F-86 H Sabre Jet42000 MiG-iS45000 F-15 Eagle98700 BD-5J42300 Scale Warbird Kits P-Si Mustang5090036025 P-47 Thunderbolt5360037950 A6M5 Zero4940035000 F4U-1 Corsair4790033900 Aerobatics Biplane Kits Deluxe Pitts40600 Christen Eagle35000 Staggerwing G-17S54400 CAP 2130400 Glasair TD35300 Beechcraft Kits Beechcraft Baron 5854000 V-35B Bonanza24600 F-33A Bonanza26500 A-36 Bonanza27500 T-34B28200 T-34C30000 Shipping $1000 Engines/Propulsion Systems Retail $37800 28995 16350 25882 39995 Shipping $ 300 300 300 300 300 results higher drag So message locate CG far back possible introducing instability personal matter depends skill flying style much anything else Having found comfortable CG position can use trim controls transmit ter best advantage Lets just run through observable effects go very underelevated stall point begin pushing trim stick hard forward model flies fast comes down fast wing made operate very low angle attack its drag lowest Unfortunately lift resulting lift/drag ratio being poor As trim control moved back plane slows down its angle descent reduces some point glide angle reaches its flattest model still flying quite fast near stalled condition point called best liftto-drag ratio Interestingly point minimum sink because although glide angle flattest model flying quite fast down glide slope However point maximum distance coverage therefore trim use trying distance moving between thermals As trim moved back further flying speed reduces glide angle increases Just before stall wing its highest angle attack can shown plane condition minimum energydissipation hence minimum sink can shown mathematically key parameter CI/Cdcoefficients lift drag Cito power 15 divided Cd maximized sink lowest confusing things about condi tion glide angle may appear much worse optimum can give illusion high sink have fallen pitfall suggest try timed flights two launches day too much thermal activity trimmed best glide angle just off stall difference may high 25% better forthe near-stalled condition list trim pointers follows 1 glide angle particular trim independent wing loading loaded model will fly faster along same glide path lightly loaded 2 cleaner model greater will difference between trim flattest glide trim minimum sink 3 lowest ghde angle best distance ie thermal-hunting 4 lowest-sink condition best thermal 5 CG position mostly affects stability glide performance should far back comfortable control point Im sure some saying yourselves What no mention Reynolds numbers Well usual Reynolds number effects can completely upset above state ments will make some remarks Since flying speed can greatly different between minimum sink best glide ratio possible very clean model such Aquila Grande operating sufficiently fast best glide angle performance airfoil improved significantly business trip opportunity stop Belle Mead NJ meet Frank Heinrich general manager Robbe Model Sports US operation Robbe name may familiar American Sailplaners have growing line gliders think will interest range fliers beginners experts Robbe large manufacturer sorts toys Germany produces extensive line power planes gliders cars especially boats plus sorts accessories togo company has 300 employees 10% engaged developing new products now finishing up new items will introduced very important Nuremburg Toy Fairin 1988 Robbe does its own manufacturing includ ing blow-molded fuselages foam injectionmolded balsa-covered wings little accessories foregoing until recently did apply radios made Futaba now Robbe coming Out its own radios ranging simple computer-controlled super-sophisticated sets will spell out owners name transmitters liquid crystal display general Robbe gliders different construction normal American allwood wood/foam/fiberglass-type kits first thing youll notice high degree prefabrication fact everything pre formed covered assembled drilled etc especially nice beginners because have best chance complete perfectly-aligned good-flying plane getting discouraged December 1986 149 Factory Byro-Jet Ducted Fan Performance FactoryShipping Package w/OS 77$28000 29550105005 77 Engine21495 319001000Quadra 40 Engine13500 305001000Quadra 50 Engine22000 297501000Quadra 80 Engine set up CD 319001000 Ign less flywheel ig.30000 699003000PurrrPowr w/Q50 Engine 299501000 Super Quiet boosted power3600029000500 PurrrPowr Muffler Mount 1500 Quadra 50112007920300 1300NEW Powr Prop 4 Blade 1300 w/Sachs 42 CD Ignition 1600 mount6990054815500 NEW Powr Prop 3 Blade 287501500 w/Sachs 42 CD Ignition 247501500 mount6850053815500 385001000Byro Jet Ducted Fan less engine82005850300 214501000 249951000Finishing Materials Accessories stock wide variety finishing materials accessories well other related hobby items competitive prices 3822510 00 174501000Shipping costs UPS 48 contiguous states AK HI overseas call 188001000for shipping costs Prices subject change notice 194501000 -mKTh MasterCard Visa Welcome 199501000 212851000 MjtL-. L detailed info pack kit send $200 complete Catalog send $300 Byron Originals Box 279 Grove IA 51445 12 364-3165 iltUaif 1111 RIIIIU Horizon Model Inc ad run october issue run error Horizon Model Inc. instructed us run ad due changes some kit materials An error part caused ad incorrect information included Oc tober sorry problems caused advertiser some customers SUCCESS iSears experience no fable jrepresenting OPS just hard work nes parts Thats success See CR5 Engines Local Hobby Shop Parts People Com~eeaekw 9mio44 9#c PO Box 26247 Orleans LA 70186 42-5967 middle difficult construction project good example philosophy RC Start kit introduced Toledo year could take 945-in-span kit twochannel radio darkest Borneo go flying has Robbes usual blow-molded Plura un breakable glueable paintable plastic fuselage almost-finished Jedelsky-airfoil wing glue decals sanding sealer hardware lead nose weight sandpaper paintbrushand two screwdrivers Theres no paint sealed natural-color balsa surfaces perfectly OK goodies have cost $129 list price someone limited time experience investment well-justified latest Sailplane Robbe other end spectrum Its new four-meterspan 157 inches semi-scale ASW 17 Royal has 1054 sq area resulting average chord 67 aspect ratio 235 Ritz airfoil section spoilers flaps ailerons kit also has prefabricated compo nents lots nice hardware Flying four-meter ship something requires bit experience Make lot experience list price $299 puts serious investment category have done will tell flying big plane thrill lifetime box too big UPS its best call number given below arrange shipping between two planes Robbe has range stralght-wingers others slope WANNA RACE LLL BEGINNER RACES r 0* FORM-i * FAI Instructions b Programs Information Contact NORTH EAST PYLoN RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 thermal flying particularly appeals 60-in-span flying wing called Geier has small amount sweepback almost constant chordthe outer 10 leading edge sweeps little successful flying-wing Sail plane kit market said good less-experienced pilots has built-up wing construction elevons Plura podtype fuselage hold workings As other Robbe glider kits can converted electric power Robbe supplies through dealers electric stuff required including very popular Automax 21 charger thats Bob Kopskis department brand new 380-page catalog send $3 Robbe Model Sport 180 Township Line Rd Belle Mead NJ 08502 telephone number 201 359-2115 Id like end month hint sent RAMS member Deral Carson Dayton OH Very much enjoyed article MAs September issue Its always good see review basics once such Thornburgs Rules may would like add rule list will likely apply us high-starters though watch chute find out whats going gliders altitude location As exit launch keep eye chute Sometimes can lift strong enough keep chute suspended however other times can down-air strong enough collapse chute drop line pile Occasionally lift will draw chute particular direction watching chute fall also get idea went dont spend time looking flying like flying like Carl Goldbergs Gentle Lady Some day Im going try something else modified winglets described MAs May 1980 issue now has very-muchimproved penetration best sink rate Thanks Deral Rule merrier Speaking merry have good Christ mas lets hoe Santa brings Soaring goodies list Byron Blakeslee 3134 Winnebago Dr Sedalia CO 80135 RC Scale/Wischers Continued page 57 notch Clamp blocks vise aluminum tube wire already started pull vise-grip plier aluminum will squeeze down tightly around music wire core case notched groove must quite smooth lines will show up soft aluminum No matter made streamlined flying landing wires really something enhance appearance large Scale bipe saga has good travel year Wischers began soon after Toledo annual trip Paris FAT meetings during also visited Musee de lAir Le Bourget ailport French National Auto Museum Mulhouse headed south Italy short social call Cesare Milani former World Champion CL Scale home shores Lake Maggiore Returning northward tour through Switzerland stopped fly electric-powered Sailplane Hansruedi Zeller member Swiss RC Scale team return flight Luxembourg Chicago way Iceland After few weeks home again departed eastward Underwood home Reston VA base operations June Bealton Scale contest also made quick visit National Air Space Museum view Continued page 152 150 Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$695 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$495 Ready Fly$795 Add $3 postage handling first 2 packages 10% additional P0 8ox68132 AIRCRAFT CO Portland OR 97268
Edition: Model Aviation - 1986/12
Page Numbers: 54, 55, 148, 149, 150
Radio Control Soaring Byron Blakeslee CONGRATULATIONS new F3B team Steve Work Albuquerque NM Rich Spicer San Jose CA Steve Lewis Santa Ana CA Alternate members Larry Jolly Seth Dawson German-made King Spicer-developed Synergy dominated finals Two Kings three Synergys top five total seven Kings four Synergys out 17 contestants 1987 F3B World Championships will held Achmer Airport near Osnabruck nortwest corner Germany far Bre men date July 24-August 2 1987 Contest Director will Hans-Joachim Kunze late Dan Pruss have FAI jury member will replaced either Geoff Dalimer Sandy Pimenoff 86 Nats several people asked going replace Dan MAs Soaring contributing editor answered No nobody can replace Danbut Ill try continue doing column best can Others wondered column-writer needed some kind Rock Star answer course proved contest emphatic No qualification know ing send copy Column content will determined whatyou ask about and/or send Apropos thought Barry Kurath news letter editor Portland Area Sailplane Society sent copy excellent hi-monthly Please keep em coming Barry letter good suggestions Quoting part Barrys letter Enjoyed section Thornburgs Rules River Air article legendary dont know magazine published its about time reprinted club members prefer hard information almed various levels skill experience Construction tips trends design trimming airplanes new products some favorite subjects Contest reports good include data photos airplanes rather Joe Blow won long flights accurate landings other words like anything can use make flying better fun Thanks thoughts Barry couldnt agree can come up kind material regular basis column should satisfy its objectives way homework Ive reread ing Dans old columns Luckily never throw away MA magazines believe Dans objectives too Since publication AMA feel special respon sibility try serve AMA Sailplaners So keep cards letters photos newsletters coming recognition appreciation fine job did hosting F3B finals months Club Month Minnesota RC Soaring Society receive hearty Well done lot work other hand members reward seeing meeting top fliers country always fun can great learning experi ence finals CD Bob Sealy also club president used edit MRCSS excellent newsletter An all-around guy Other club ficers Dale Eason Tim Thomas John Borlaug Ross Swenson current editor kind enough send photos Ross writes club now has 102 members skill levels interests represented fly Thermal Slope Electrics Just shows popular various facets Soaring John Borlaugs Weird fantastic flier sure strange see flying backwards really irks some people beaten airplane doesnt know way fly Weird canard design New Jerseys Dick Sarpolus appeared conWinner MRCSS Building Contest John Borlaug scratchbuiit Weird 11 -year-oid design Dick Sarpoius Flying Models pians fiies great Photos Swenson MA has featured some Sarpolus powered canard designs recent years Germanys Robbe Model Sport company makes great fine kits Frank Heinrich L its US general manager seen displaying few Sailpiane kits front New Jersey office/warehouse Robbes newfourmeter1 575-in-span ASW 17 Royal seen right Modei features alierons fiaps spoilers plura piastic fuselage precovered fiying surfaces Soid direct see coiumn phone no 54 Model Aviation Joe Jan Wurtswerethe winning team Santa Maria Soaring Societys sixth nual cross-sountrycontest Theycompleted full 26-mile triangular course nearCali fornia Valley CA two days meet Photo Bill Doose struction article June 1975 issue Flying Models magazine BR would like see sweeping changes F3Blike elimination ballast changes tween tasks maybe dropping Speed task need get people involved Thanks Ross club info thoughts F3B people concur should some way get bigger involvement F3B far hasnt happened now appears F3B very real crossroads Either its appeal broadened itll become extinct having ideas subject invited write well kick around possible solutions Sailplane trim following piece Ian Turner appeared newsletter October 1986s Club Month South Bay Soaring Society example stuff John Dvorak prints Silent Flyer think well-written significant article cause trimming can such vexing problem listening various flying sessions have heard lot different remarks made having trim Sailplane Statements like Youve really got keep plane moving haul back trim really floats typical have sensed occasions defin ing best trim setting well-understood thing article Ive tried explain options resulting effects open us Let deal briefly CG location aerodynamic performance point view CG location has second-order effect such things sink speed glide ratio Providing CG ahead center Continued page 148 Windeong kit-maker Bob Dodgson must proud MRCSS Team Windsong because of NSS hardware collected team made up L R Ross Swenson Steve Bowman Kent Rogers Photo Swenson FAI RUBBER Sizes 1/43/16 1/8 3/32 1/16 042 thick pound box Price $1300 includes 4 oz Slick Lube Price $1200 no lube Slick costs $1 75 Postpaid US Via UPS Cal add 6% tax SMALL BOX 1/4 lb rubber $450 size Orders up $1500 1/4 lb rubber nde add $150 UPS Over$l5add 10% MEW e rebber classIcs P30 prep Air Express MinI-Peagl Crecket hoeks Frent miii assembles 3 Prep kits Stanluster Satellites winders hardware leeks mere ZONA SAWS famous line hobby saws Razor#200 $255 Universal #500 Saw set #100 $450 Replacement Blades available dealer Send $100 1986 Cataiog F Mo del Supply December 1986 55 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 Njer ltlPEANUT SCALE Piper Vagabond Piper Cub Stinson 125 Outdoor kits each. $650 Light Indoor kits each. 3605 PEANUT hid IIdle. $605 SPORT SCALE PC-S Porter Taylor Craft jr- Stinson Voyager Rubber CO2 Power PC-S ParlorKits each. $750 SPORT MODELS An Embryo Model 18 Span designed win beginners experts . $750 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft 5595 True Olde Japanese Tissue 10 3 colors . Japanese Tissue t2 6 colors 3395 Microlite Plain3325 Silver5395 Microfilm 3375 Glue 3160 Solvent Condenser Paper 3 sheets 375 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thrs 085each 3175 3/32 tliru 5/32each 3195 Winder 61 395 Mail 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mum Postage 3150 COMPLETE CATALOG 3150 P0 eox 3967 Torrance CA 90610 DO YOU HATE TO INSTALL HINGES st exciting product introduced R/C Fieid * Ref iects its name easy hinges instail * A Single Siot Few Drops C/A Giue Gouging Pinning Hinge Pins worry about 1 * Dont iet smail size fool theyre Incredibly Strong * Virtuaily Indestructibie Designed 1/2 Thru Giant Scale * Demonstrated major RC Modei Shows * Available Hobby Dealer 24 EASY HiNrcs $295 c: EASY HINGSTM 137 N Pacifsc St Suite DSan Marcos Ca 92069 Radio Technique/Myers Continued page 51 ailerons made plane lean little tried elevators power available enough loop tapped rudderand got 2 snap rolls before could get thumb back started adrenalin flowing Time land set ttle tried trim descent fell like rock After few attempts landed full back-stick about 80% throttle ending landing roll right feet spectators thought flies good Little did know Joe went modify airplane until flew like other always wished hadnt wanted keep plane aroundjust visiting hot shot pilots try seriously intend help someone learn fly RC should spend some time flying own airplane badly Out trim Push trims way end practice making Figure Eights crossing time point convenient cloud sky make some takeoffs landings still out trim good training preparation next student will show up plane cant trimmed flight Next same thing CG moved back until airplane almost unflyable CG moved far forward can barely take off good training teaches recognizeand deal withthe kind problems will face Just record have flown airplanes CG out front wing werent canards have flown CG behind 50% point much fun faced new model dont know should balance try 20% behind wing leading edge its biplane 20% behind leading edge top wing have dual-rate controls practice dual rate set minimum simulate in-flight failure servo Guess got idea prefer have too much control available first flights set up pushrods much possible within reason Beginners usually set up too little control dont know just Get throttle right before first flight best friend can throttle will kill engine command cant remember students have presented brand new engine brand new airplane would loop low throttle plus low trim keep doing New engines wont idle nervous student shuts off receiverjust before launching plane always produces crash has happened three times 30 years hate gadgets put switch inside airplane leave guess whether wire should pulled out pushed fly really must train ourselves wiggle control stick watch control surfaces respond before flight have train students same way Insist really believe should flying redundant radios Ive talking about last couple months wont happen until some manufacturers start offering packaged redundant systems Ask Ask dealer dont stock redundant radios Write manufacturers ask same question Theyll sell anything will buy well safer hope have found piece entertaining has started thinking about respon sibility accept offer become Instructor Pilot writing has worthwhile George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 RC Aerobatics/Van Putte Continued page 53 way went means 101 dB two times noise 94dB What does prove Maybe equipment needed calibrated often Perhaps engine different noise level weather hot cool Possibly operators read noise level wrong Ill interested hear what Howard Crispin Chairman AMA Sound Committee has say about sound measure ments 1986 Nats Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Blakeslee Continued page 55 pressure wing plane will stable As CG moved farther forward stability increases stab must now work harder harder keep nose up PYLON FREE FLIGHT UC SPEED RACING COMBAT EPOXY-GLASS PROPS CONTINUOUS LENGTH AS LOW AS $125 EA FREE BROCHURE Div Pops Prop,IncJ// 709 Crescent Sunnyside WA 98944 509-837-5983 S aVO Old TII11qg 1niwteS RepfO6uctOIt P@~ IOV ee BENTOM N JR CAMPBELL IGENE DUBOIS GUILLOW- K&B- K&S L R st this. OMET- COVERITE COX DUBRO BUILT MODELS FAt INE FOX- GOLDBERG-GOLDEN AGE REPROspa PERFECT MAX PACTRA PECK-POLYMER R/N MODELS SEAGL STERLING- SULLIVAN R TIGRE TAFFINDER TELCO FLITE- TREXLERI WILLIAMS & OTHERS IESTES MODEL ROCKETSI II S.id $100 ie Cesh Check Stamps ition tabloid sire DISCOUNT Catalog tstationsover 700 Kits choose IEngine IMAILORDER PHONEORDER IN STOREI PENN VALLEY HOBBY CENTER IOver 600 items U7 W Main t LansdalslaAUI4I $200 current catalog 148 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunhird 10 Sunbird Jr youll find Sunhird perfect sport plane 3fl P RECISKN PROIUCTS INC 714 592-5144 511 E Arrow Highway San Dimas CA 91773 ~2NALS Byrons Best Buys Direct Save ship within 24 hrs Retail Factory Pipe Dream Trainer$19700 $13995 Ducted Fan Jet Kits Retail F-16 Fighting Falcon41100 A-4 Skyhawk45000 F-86 D Sabre Jet43000 F-86 H Sabre Jet42000 MiG-iS45000 F-15 Eagle98700 BD-5J42300 Scale Warbird Kits P-Si Mustang5090036025 P-47 Thunderbolt5360037950 A6M5 Zero4940035000 F4U-1 Corsair4790033900 Aerobatics Biplane Kits Deluxe Pitts40600 Christen Eagle35000 Staggerwing G-17S54400 CAP 2130400 Glasair TD35300 Beechcraft Kits Beechcraft Baron 5854000 V-35B Bonanza24600 F-33A Bonanza26500 A-36 Bonanza27500 T-34B28200 T-34C30000 Shipping $1000 Engines/Propulsion Systems Retail $37800 28995 16350 25882 39995 Shipping $ 300 300 300 300 300 results higher drag So message locate CG far back possible introducing instability personal matter depends skill flying style much anything else Having found comfortable CG position can use trim controls transmit ter best advantage Lets just run through observable effects go very underelevated stall point begin pushing trim stick hard forward model flies fast comes down fast wing made operate very low angle attack its drag lowest Unfortunately lift resulting lift/drag ratio being poor As trim control moved back plane slows down its angle descent reduces some point glide angle reaches its flattest model still flying quite fast near stalled condition point called best liftto-drag ratio Interestingly point minimum sink because although glide angle flattest model flying quite fast down glide slope However point maximum distance coverage therefore trim use trying distance moving between thermals As trim moved back further flying speed reduces glide angle increases Just before stall wing its highest angle attack can shown plane condition minimum energydissipation hence minimum sink can shown mathematically key parameter CI/Cdcoefficients lift drag Cito power 15 divided Cd maximized sink lowest confusing things about condi tion glide angle may appear much worse optimum can give illusion high sink have fallen pitfall suggest try timed flights two launches day too much thermal activity trimmed best glide angle just off stall difference may high 25% better forthe near-stalled condition list trim pointers follows 1 glide angle particular trim independent wing loading loaded model will fly faster along same glide path lightly loaded 2 cleaner model greater will difference between trim flattest glide trim minimum sink 3 lowest ghde angle best distance ie thermal-hunting 4 lowest-sink condition best thermal 5 CG position mostly affects stability glide performance should far back comfortable control point Im sure some saying yourselves What no mention Reynolds numbers Well usual Reynolds number effects can completely upset above state ments will make some remarks Since flying speed can greatly different between minimum sink best glide ratio possible very clean model such Aquila Grande operating sufficiently fast best glide angle performance airfoil improved significantly business trip opportunity stop Belle Mead NJ meet Frank Heinrich general manager Robbe Model Sports US operation Robbe name may familiar American Sailplaners have growing line gliders think will interest range fliers beginners experts Robbe large manufacturer sorts toys Germany produces extensive line power planes gliders cars especially boats plus sorts accessories togo company has 300 employees 10% engaged developing new products now finishing up new items will introduced very important Nuremburg Toy Fairin 1988 Robbe does its own manufacturing includ ing blow-molded fuselages foam injectionmolded balsa-covered wings little accessories foregoing until recently did apply radios made Futaba now Robbe coming Out its own radios ranging simple computer-controlled super-sophisticated sets will spell out owners name transmitters liquid crystal display general Robbe gliders different construction normal American allwood wood/foam/fiberglass-type kits first thing youll notice high degree prefabrication fact everything pre formed covered assembled drilled etc especially nice beginners because have best chance complete perfectly-aligned good-flying plane getting discouraged December 1986 149 Factory Byro-Jet Ducted Fan Performance FactoryShipping Package w/OS 77$28000 29550105005 77 Engine21495 319001000Quadra 40 Engine13500 305001000Quadra 50 Engine22000 297501000Quadra 80 Engine set up CD 319001000 Ign less flywheel ig.30000 699003000PurrrPowr w/Q50 Engine 299501000 Super Quiet boosted power3600029000500 PurrrPowr Muffler Mount 1500 Quadra 50112007920300 1300NEW Powr Prop 4 Blade 1300 w/Sachs 42 CD Ignition 1600 mount6990054815500 NEW Powr Prop 3 Blade 287501500 w/Sachs 42 CD Ignition 247501500 mount6850053815500 385001000Byro Jet Ducted Fan less engine82005850300 214501000 249951000Finishing Materials Accessories stock wide variety finishing materials accessories well other related hobby items competitive prices 3822510 00 174501000Shipping costs UPS 48 contiguous states AK HI overseas call 188001000for shipping costs Prices subject change notice 194501000 -mKTh MasterCard Visa Welcome 199501000 212851000 MjtL-. L detailed info pack kit send $200 complete Catalog send $300 Byron Originals Box 279 Grove IA 51445 12 364-3165 iltUaif 1111 RIIIIU Horizon Model Inc ad run october issue run error Horizon Model Inc. instructed us run ad due changes some kit materials An error part caused ad incorrect information included Oc tober sorry problems caused advertiser some customers SUCCESS iSears experience no fable jrepresenting OPS just hard work nes parts Thats success See CR5 Engines Local Hobby Shop Parts People Com~eeaekw 9mio44 9#c PO Box 26247 Orleans LA 70186 42-5967 middle difficult construction project good example philosophy RC Start kit introduced Toledo year could take 945-in-span kit twochannel radio darkest Borneo go flying has Robbes usual blow-molded Plura un breakable glueable paintable plastic fuselage almost-finished Jedelsky-airfoil wing glue decals sanding sealer hardware lead nose weight sandpaper paintbrushand two screwdrivers Theres no paint sealed natural-color balsa surfaces perfectly OK goodies have cost $129 list price someone limited time experience investment well-justified latest Sailplane Robbe other end spectrum Its new four-meterspan 157 inches semi-scale ASW 17 Royal has 1054 sq area resulting average chord 67 aspect ratio 235 Ritz airfoil section spoilers flaps ailerons kit also has prefabricated compo nents lots nice hardware Flying four-meter ship something requires bit experience Make lot experience list price $299 puts serious investment category have done will tell flying big plane thrill lifetime box too big UPS its best call number given below arrange shipping between two planes Robbe has range stralght-wingers others slope WANNA RACE LLL BEGINNER RACES r 0* FORM-i * FAI Instructions b Programs Information Contact NORTH EAST PYLoN RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 thermal flying particularly appeals 60-in-span flying wing called Geier has small amount sweepback almost constant chordthe outer 10 leading edge sweeps little successful flying-wing Sail plane kit market said good less-experienced pilots has built-up wing construction elevons Plura podtype fuselage hold workings As other Robbe glider kits can converted electric power Robbe supplies through dealers electric stuff required including very popular Automax 21 charger thats Bob Kopskis department brand new 380-page catalog send $3 Robbe Model Sport 180 Township Line Rd Belle Mead NJ 08502 telephone number 201 359-2115 Id like end month hint sent RAMS member Deral Carson Dayton OH Very much enjoyed article MAs September issue Its always good see review basics once such Thornburgs Rules may would like add rule list will likely apply us high-starters though watch chute find out whats going gliders altitude location As exit launch keep eye chute Sometimes can lift strong enough keep chute suspended however other times can down-air strong enough collapse chute drop line pile Occasionally lift will draw chute particular direction watching chute fall also get idea went dont spend time looking flying like flying like Carl Goldbergs Gentle Lady Some day Im going try something else modified winglets described MAs May 1980 issue now has very-muchimproved penetration best sink rate Thanks Deral Rule merrier Speaking merry have good Christ mas lets hoe Santa brings Soaring goodies list Byron Blakeslee 3134 Winnebago Dr Sedalia CO 80135 RC Scale/Wischers Continued page 57 notch Clamp blocks vise aluminum tube wire already started pull vise-grip plier aluminum will squeeze down tightly around music wire core case notched groove must quite smooth lines will show up soft aluminum No matter made streamlined flying landing wires really something enhance appearance large Scale bipe saga has good travel year Wischers began soon after Toledo annual trip Paris FAT meetings during also visited Musee de lAir Le Bourget ailport French National Auto Museum Mulhouse headed south Italy short social call Cesare Milani former World Champion CL Scale home shores Lake Maggiore Returning northward tour through Switzerland stopped fly electric-powered Sailplane Hansruedi Zeller member Swiss RC Scale team return flight Luxembourg Chicago way Iceland After few weeks home again departed eastward Underwood home Reston VA base operations June Bealton Scale contest also made quick visit National Air Space Museum view Continued page 152 150 Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 74 3 Pak$695 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$495 Ready Fly$795 Add $3 postage handling first 2 packages 10% additional P0 8ox68132 AIRCRAFT CO Portland OR 97268