Radio Control: Soaring

THORNBURG IS BACK RC Soaring less began mid late Sixties pioneers time Dave Thornburg Albuquerque NM considered fellow competition fliers leading Soaring guru through Seventies moved Califor nia closer big action Dave wrote series articles Model Builder magazine late Seventies early Eighties theyve come recognized classics often still see references magazine columns club newsletters Thornburgs 12 Rules Soaring should memorized Glider fliers Dave kind burned out moved back Albu querque has pretty much out Soaring last six eight years So imagine sur prise delight sent word new book titled Old Buzzards Soaring Book letter Dave said rewriting new research chief reason wound up flying field got hooked again thought cured time Dave also mentioned expects cam paigning Max Mills Southwind Glider contest circuit season ship second sure hope will fly upcoming Soaring Masters contest California because ever flier deserved Soaring Master label its Dave press release Daves book During late Seventies early Eighties Dave Bird Time Thornburg contributed over 60 construction articles essays modeling press Now 15 best Soaring pieces have reprinted paperback Old Buzzards Soaring Book jammed tips experts thermal lore contest dos donts programming yourself better land ings ways improve kit models techniques designing own Sailplane book 160 pages includes two Daves classic essays thermal-hunting River Air Perfect Thermal pilots have called River Air single helpful article theyd ever read RC Soaring books first nine chapters focus fly ing last four cover Sailplane design basic aerodynamics Daves nonmathematical ap proach aerodynamics both witty wise ngle formula manages explain airplane flies can make fly better chapters Old Buzzards Soar ing Book originally appeared shorter form Model Builder magazine piece contains new updated material including over 50 new cartoons illustrations comparison charts book intermediate Soaring pi lots rank beginners Dave says wont tell cover wing make test glide over tall grass Old Buzzard folk al ready know fly lk starting think about might fly little better land little consistently compete little successfully contests Also its just fun book curl up rainy night Its full blue skies nd cumulus clouds rising al said hot air Theres chapter two Slope flying case need break pursuit wily thermal Old Buzzards Soaring Book available di rect publisher Pony X Press 5 Monticello Drive Albuquerque NM 87123 price $1495 plus $150 shipping han dling call 1-505/299-8749 Visa MC COD shipment Dealer discounts 10 copies Perfect ThermalThermal lore straight Old Buzzard Happy LandingsThe invisible window makes easy River AirWho has seen Wind Lots people Twelve Hot Tips Thermal SoaringThe col lected wisdom winners Stalking Invisible ThermalHow hunt thermals Glider FlyawayWhat model tries escape Choosing Slope SiteGood slope sites everywhere Fine Art Slope SoaringHow con quer windy hill Ten Ways Lose Sailplane ContestThe 38 Model Aviation Radio Control Soaring Byron Blakeslee 3134 N WInnebago Dr Sedalia CO 80135 Southwind attractive new Standard Class Sailplane kit $75 Max Mills Models Allwood craft receives favorable review months column Want Order Max Dave Ackers generic pod-and-boom fuselage Buzzard Sailplane Photo above shows fuselage Olympic Ii tail feathers bolted provision Oly II wing Photo low has P4B ready V-tail top Pod boom units shown separately bottom Old Buzzards table contents Timbs Engineering has two sizes tow hooks welded Super tow ring avail able Theyre very nicely made details address author Byrons column Dave Thornburgs new book should must list Sailplaner Com plate ordering Information column IIfl Os ORDERS SHIPPED WARBIRDRECEIVED OUR 23RD YEAR ANY TWO VIDEOS ONLY $7595 ANY 3 VIDEOS ONLY $10795 SPE6IAL IMIRODIJIORY OFFER ALLS VIDEOS ONLY $19995 WARBIRD CHECKOUT VOL 1 Flying P-40 Warhawk Corsair FGF Hellcat SB2-A Buccanneer Avenger NF 1325 Programs2 Hr Only $3995 WARBIRD CHECKOUT VOL II Flying P-38 Mitchell Bomber P-61 Black Widow Invader NP 1454 Programs100 Mm Only $3995 WARBIRD CHECKOUT VOL III Flying P-51 Mustang A-20 Bomber P-39 Introduction P-39 Advanced NP 1514 ProgramshO Mm Only $3995 commonest Contest mistakes Part Two DESIGN Sharks fly BetterOn Glider little thingsWARBIRD CHECKOUT VOL V mean lot Some Notes Designing OwnYouFlying B-29 Pre -Flight BI7E Flight B-24 start boring old wing.NP 155-3 ProgramSi 07 Mm Only $3995 Notes Designing Own. andMODERN JET FIGHTER get fun partFlying FIA18 Hornet Eagle F-16 F16C Glib Glossary Glider GibberishA fewand Thunderbird nge words made clearams60 Mm Only think Daves book will godsend Sailplaners have taken up hobby past eight years havent benefit learned shall say uninhibited style writing truly great stuff Heartily recommended Im sure will enjoy Old Buz zard benefit its teachings Southwind Max Mills new Stan dard Class Glider kit market allwood kit available directly Max Albu querque $75 plus postage best way tell about kit print letter old pal Tom Thompson sent describing new Southwind Tom Steve Works helper 1987 US F3B World Champs team knows bit about high-performance Sailplanes Toms letter getting point flying model Sailpianes becoming work play really high-performance Sailplanes get ting too much trouble fly because re quired lot space monofilament line sev eral friends practice F3B Speed Distance Hans Mueller Kings Comets getting too much money import other end spectrum few new exciting Sailplanes build kits well-known standard lines fairly good performing kits didnt want spend lot time building Id rather flying So started build quarter-scale power planes put Soaring back burner day local hobby shop owner said Arent looking sexy Sailplane goes fast lands slow ther mals like F3B didnt know what say course looking kind ma chine some time said Look Sailplane up hang ing ceiling Hanging its beauty piece fishing line 99-in poly winged Sailplane double-sweptback lead ing edge just like F3B ships sleek white fus elage flying stab flaps love first sight next words get Continued page 116 May 1990 39 WARBIRD CHECKOUT VOL IV Flying P-47 3 parts Flying T-6 3 parts NP 1366 Programslb MIn Only $3995 CALL TOLL FREE IT CARDS LiJ Day Night Money Order Check Credit Card Masterwsru vi Shipping Paid Continental US-ForeIgn add $500 0 California residents add 6 1/2% tax NP VIDEO LIBRARY 2554 LINCOLN BLVD #568 MARINA DEL REY CA 90291 RC Soaring/Blakeslee Continued page 39 said new plane being kitted right Albuquerque Sign up said kit beautiful proved just satisfying airplane itself excellent plans great wood handmade ribs fuselage sides formers also very comprehen sive assembly manual What deal Fuselage assembly time two evenings wings took two evenings also spare eve ning working time plane ready fly just two weeks out local soccer field After usual hand launches radio checks trimming launched hi-start went up straight string lowered flaps about quarter inch launch straining hi-start because climbing hard What great launch Now cruise part flight Looking lift reflexed flaps Like shot plane sped forward complete control lost no alti tude made almost complete circle field finally wasthe lift eased little Down flap test out its effect Lo behold plane started rise dramatically thing climbing like elevator Ive found plane really good lift actually flies nose pointed down elevator becomes something rudder because steep angle attack youre flying Yet neutralor small amount Downflap plane will ride smallest bubble air like balloon After full 15 minutes great flying time dreaded first landing usual cautions look traffic set up ap proach started turn base leg feed full down flaps nose pitched up ever slightly plane seemed come con trolled stop air No fighting elevator no panic feeling thing going roll over wing spin just really nice glide soft landing always complete control easiest Sailplane catch Out air have ever flown Well guess lets know easy build fly Southwind much fun Im having flying Im going flying now Thanks scoop Tom Judging photo Toms plane Southwind looks nicely balanced no tricks type intermedi ate-level design specs rudder elevator flap functions 99-in span modified Eppler 193 airfoil 788-sq-in wing area 9-in root chord 45-in tip chord 54-oz dry weight As mentioned above price quite reason able $75 Best call 1-505/292-3510 learn about availability shipping charges ad dress Max Mills Models 3820 Cheraz NE Albuquerque NM 87111 Max has just come out really nicelooking straight-winged ailerons flaps com panion design called Westwind allwood kit foam wing cores priced $125 plus postage should perfect Sportsman Multi-Task-type flying Buzzard Series fuselages Readers Jim Grays fine R/C Soaring Digest will probably have noticed ad back Precision Cores Pleasanton CA proprietor PC gentleman named Dave Acker name implies Dave primarily supplying foam wing cores last years Scale Slope Fun Fly Dave showing some Buzzard Se ries fuselages fuselages nicely made asked Dave info various Buzzards story As deduced conversations Kennewick am very excited about Buzzard series actually group three Gliders de signed use same fiberglass fuselage fuselage will allow wing attached rub berbands bolt-on plug-in fuselage pod-and-boom design boom can cut whatever length desired builder can used almost unlimited variety Glider stzes first configuration called Baby Buz zard intended transition ubiqui tous Oly II Olympic 11Ed similar Glider will allow new flier transfer wing stab fin/rudder standard-sized radio gear smaller cleaner sexier Buzzard fuselage cluded set plans instructions construction tail platform Oly stab can bolted place bolt-on tail option Oly II kit second version called Silver Buz zard intended wonder what would happen t What changed wing shape size airfoil allows modeler try out new wing configuration having build completely new Glider what about tail feathers would old Glider fly flying stab tail s jut WQI*1fl9 Eon Srut Vornier PO-X o 00S tail Another area individual creativity method wing attachment bolt-on vs plug-in ideas can tried out As Im looking something will survive 800-ft vertical landing Its intention provide representative plans various wing attachment tail con figurations Also since tail areas based overall Glider dimensions include propor tional table will allow builder increase decrease tail areas match particular Glider size table conservative side pro vides something will work may optimal design Again keep new fliers going too far afield third version 01 Buzzard perhaps closest heart obvious rea sons hobby strangely enough seems generate orphan parts have several good wings tails required fuselages Good heavens have some old Free Flight wings around 01 Buzzard fuse lage will allow put stuff back air can also try convince new kids sembly old parts latest design break throughs Case point latest Schuemann wing planform used very successful Free Flight 1940-50 era Another thing person ally require forgiving Glider reasonable performance need something can take eyes off look transmitter look back sky expect find Glider left Some newermore efficientGliders re quire complete concentration same time have some ideas would like try out requires basic test bed can ac curately compare some new airfoils 01 Buzzard comes generic shaped foam wing cores cores will allow construc tion wing span up 144 Cur rently available airfoils S3021 S4061 E193 E205 Others will added demand dic tates Buzzard fuse really doesnt look like podand-boom because pod part has gradual taper joins boom very nice job Daves introductory prices three series de scribed above very reasonable $45 $50 $80 respectively plus shipping two-piece white foam cores Dave charges $25 plus $6 shipping Two-Meter $35 plus $8 100 $45 plus $10 up 120 no charge templates desired root tip chords exactly half-inch incre ments Just about standard airfoils computer hard-to-find goodie Dave sells As-thick obechi wing skins $8 10 x 72in size Longer wider sheets available request Call him full information 415 462-0672 The address Precision Cores 850 Concord St Pleasanton CA 94566 Tow hooks Timbs Engineering first lets backtrack second Did notice new paragraph 91 page 90 1990-91 AMA Competition Regulations aka rule book states disconnect switch now re quired positive cable winch motor new rule competition winches makes sense fact battery disconnect switch should standard item winches because can save plane winch starts run away important can preclude battery ex plosions hooking up battery winch shutting off runaway winch Last month featured Norm Timbs industrialstrength winch cutoff switches solenoids Continued page 198 116 Model Aviation Bill Efflngr * says Only Plan n Patterntta Sate gina yea aseerted dasigne yeo want have selected beet claaoic design ef Owe yee ckteeeetrern pattern part impertent enclosive featore One-Third Scale Piper Tn-Pacer PA-22 wing span eq wing atea20 30 cid engines channel RIC oc 12 lbs /8 overall length PlywoodIbalsa fuleelage removable wing panele eteerable uinee whani easy groond handling anthentic scale flight performance 1029gB Scale Piper Cub J-3 wing open ength sq wing area s4ch RIC 20 -30 cid engines - RC3S-2 6 Quarter Scale WWI SE-5A 80 5 span eq wing areas lgto22angines RCOS-7 5 SPAD C-XIII 7914wingspaes2t20sqin wingareael3to3t engines Capable ever- neptsran imagination FOKKER DR-i TRIPLANE 72wingepanr eq wingara 7gtolsoerngnes RCOS-6 6 SOPWITh CAMEL F1 St wing span 0 eq wing area 11 lbs wle RIC wood & halea cenenousso ever $heq ft drawings RCOS-ll 6 Quartet Scale WWI Fokker D-VIINew Li1 50 wingspan sq wine area 00 25 cid evolve oh ecoss 5 Poll cantriwer wings eying wiresi Removal engine ash Shook woonted landing gear Sainelplymood fsneloeo boils-op blaso wine Bitt Offlegen Peseding Meerhar AMA NPPS Hall Power Prices comylee plane sob osoembly 5 denailed paris lists PLEASE AOD $2 Oft shipping Irnailieg rebel Sow lens Plan Sets broohorO 51 refundeble coo hot mOm WE TECHNICAL SERVICES Rt 1 Box 2900 Sante Rogg Beach FL 32459 ily public involvement see article Involve Community ri July 1987 Model Aviation field lost no outsider can assistance search new site must spearheaded local people dealing local government insti tutions another gain accept ance assistance communi ty club has become integral part community youve made yourself welcome stay community wonit have work way back emergency strikes Key City Bald Eagles made themselves welcome part community paid off clubs new flying field ultimately located through club member owns farm service business didnt limit talk about Bald Eagles plight club meet ings mentioned people met workaday world such individual John Gustafson learned clubrs situation John told us father late Harold Gustafson aviation enthusiast built airstrip farm Johns Cessna 170 also enjoyed watching model airplanes fly John also thought would nice see miniature planes flying Cessnas airstrip wasnt long needless say before Bald Eagles invited set up fly ing field Gustafson farm mem bers set work immediately cutting down trees leveling land planting grass putting culverts drainage initial work done fall other work could continue spring members came out force level go pher holes remove frost-pitched rocks repair other winter damage porta-potty set up phone lines brought inan important safety factor public facility Later summer shelter built course soon weather permitted development activities interspersed flying sessions September 1989 Harold Gustafson Memorial Flying Field officially dedicated fun fly Harolds widow Betty shared love aviation John Gustafson carry farm other busi ness ventures very proud see airstrip used RC flying field farm airstrip converted ac tive RC flying field benefiting club also community whole Key City Bald Eagles Mankato can take pride flying facility can just proud cooperative efforts securing developing ideal site Bald Eagles join saying Thanks Harold think people Mankato agree responding advertisers mention thatyou read about ModelAvlatlon RC Soaring/Blakeslee Continued page 116 Normis switch solenoid priced $22 postpaid month t want show Norms new product calls Super Tow Hooks nicest tow hooks Ive come across think youll like Europeans dont have tow hooks like made light weight aircraft aluminum welded together Norm says will rotate twist un screw flex bend like wire tow hooks handle powerful winch launches ease standard model weighs 48 grams cluding three half-inch 2-56 stainless steel flathead machine screws requisite flat wash ers nuts triangular layout dimensions mounting hole layout 10 x 045 heavy-duty model weighs 115 grams about 284 grams per ounce four same-size bolts rectangular mounting hole pattern 1125 x 0625 Introductory prices $325 $450 post paid respectively order throw extra buck three Norms Super Tow Rings Its always good keep few spare rings field box years live made tow hooks bent com mon nails either 8-32 10-24 machine threads thread blind nut inside fuse locknut outside Mr Murphy predicted once step up winch blasted hook loose beauty Timbs tow hooks Continued page 200 SUPER FAST RECOVERY SYSTEMS Making Flight Failsafe C Superiority Rocket Fast Deployment Cost effective means insuring aircraft & its gear e Avoid fatal mishaps Great novice expert IFL has Recovery System Fit Aircraft SPECIFY ENGINE SIZE Plans Send lees Kit Send j99e5 Plus 200 Shipping & Handling PO BOX 629 HUDSON WI 54016 198 Model Aviation ~fnIIfl1UiC ADDS UP TO piiiigiii IllBETTER PERFORMANCE N YROD THE ORIGINAL 1b& PUSH ROD COMPLETE WITH AU REQUIRED METAL __________________________________ FITTINGS IDEALLY SUITED FOR ANY PUSH ROD ACTION RUDDERS ELETORS AILERONS THROTTLE HAflDRh#4CLUOED t5iAi CONTROL BOATS SEA PLANES.iVUR14vNvROOter IMAGINATIONir ROdwith 2-56 Threaded end 34 LONG ASSEMBLED LENGTHCat NYROD 5UPR-L3UPR0OuC mc issee Samoa Runs 4 E F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including 3/ ply firewall installed wing design formea ABS Gull covering makes wing snap build Built up tail feathers Complete hardware decals Complete instruction booklet plans 71 span 58 length 920 sq wing area 35 oz per sq ft wing loading Weight 14 16 lbs Power 80 108 two cycle 12- four cycle should never come loose pull out stan dard should fine Gliders up size Lovesong heavy-duty job meant X-C ships F3B planes realty put load winch snag foresee hooks mounting flat base round-bottomed fuse lages especially fiberglass ones between some thin wedge-shaped shims squeezing fuse little should work OK standard hook isnt too wide anyway Make sure use least 3/6-thick plywood plate inside fuse three four inches long shaped wide possible transfer loads sides fuselage Nothing embarrassing doing nice zoom launch pulling out bottom fuselage Order Timbs Engineering 1672 Los Osos Valley Rd Los Osos CA 93402 tel 1805/528-5420 Soartech #8 Airfoils Low Speeds Ive poring over book couple months let tell very tmpres sive effort Michael Selig John Donovan David Fraser book commercially printed inch thick contains 398 pages Most pages given coordinates data graphs 53 different airfoils authors tested wind tunnel Princeton University Actual reading material about 55 pages half being explanation test methodol ogy part think modelers will find inter esting Comments Airfoils au thors discuss important characteristics re spect other airfoils Following other sections discuss stall havior tips surface roughness trailing edge thickness surface waviness contour accu racy discussion Quabeck HQ2/9 contains important tidbit information differ ences between nominal HQ2/9 RGl5 S2048 small Moreover differences same order differences between nominal airfoils models HQ2/9 RUIS S2048 actually tested other words modelers cant build wings accurately enough tell difference tween airfoils similar design quest latest unbeatable airfoil month turns Out largely psychological Nonetheless theres enough material book keep Soaring Hot Stove League boiling years Soartech #8 can ordered editor/publish er Herk Stokely 1504 North Horseshoe Circle Virginia Beach VA 23451 cost $15 US Canada $20 overseas postpaid surface mail book has dedicated Sailplaners bargain century Sailplane Design computer program another great bargain Sailplaners own IBM PC clone put out same David Fraser coauthored Soartech #8 played large role success airfoil testing pro gram Princeton David wrote first program several years ago Version 30 added Princeton data revised manual reflecting new version latest November 89 ver sion 32 has VGA graphics plotter sup port few stored airplane designs As Ive mentioned before Im compulsive kit builder policy leave designing experts find its still fun play pro gram see effect changing airfoils weights etc Sailplaners enjoy designing own ships can hardly function days computer design program Davids version 32 $35 US Canada US $37 elsewhere either 525- 35-in disks Version 31 owners can updated no charge version 30 $6 earlier versions $12 Write David B Fraser 1335 Slayton Dr Maple Glenn PA 19002 Some new events An item caught eye Wind newsletter Santa Maria CA club Steve Bircher editor wrote about Joe Wurts telling him really neat contest Joe re cently flew Hand-Launch Speed Its 50yard course Base Base B back like F3B SMT best try two-minute window counts Joe said didnt say contest CD real sadistonly last try counted gamblers choice sure Go better time stand pat good ve also described Sportsman Multi-Task SMT contest Santa Maria ran December won Unstoppable Joe W Steve went wonder Hand-Launch SMT event might work Sounds like great idea Steve fact HL plane designed Speed Dis tance well Duration might well lead whole new type Glider Ships would have HL size capable faster flying Steve remarked Santa Maria club should also put Slope race F3F style can get going Slope Racing getting doors blown off pros about Slope Racing HL Multi-Task size Gliders Sometimes race day isnt enough wind lead-sled Racers So being prepared race smaller lighter weight Gliders may make sense Any comments Continued page 202 200 Model Aviation AVI order call write 74 GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio U060 /216 953-1188 GUNFIGHTERS * POSITIVE FEEL * USED BY TOP PILOTS * FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO Alunilnum/BrasslCopper Tubing & Shapes Music Wire Too OSoldenng Irons 0 Finishi Send 25 Waft No 652 Der Fledermaus$675 RO Low-wing sport plane 20/25 power spans 55 No 653 Avanti$575 CL Profile Sport Scale canard bizliner twin 049s spans 381/2 No 193StIletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs No 262crashmaster CL Crash-proof trainer two sizos15/30 35/40 power 5 No 3101930 Fleet Biplane PC Sport Scale 35140 4-channel Wingopan Shin /n scale Two sheets No 314Drake II PC Ken Willards flying boat 3-channel owor Fly land removable gear 5 No 328Taylor cub PC Don Srolls Schnolyard-Scale 049s 2-3 Channel Spans 50 No 332Zephyr PC Small 2-channel glider hand-launch tow thermal slope snaring $200 No 386Laser 200 PC Sport Scale replica clrampionohip Aerobatic flier Uses 40 power 4-S channel Two sheets 5 No 4471/2A Misa AmerIca PC Old-Timer r/0 Texaco model 049 glow 2-channelo 0 No 4804-40 PC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels 0 No 469Blue Max II PC Fun-fly sportoter 40-sloe engines spans 52 Lightweight otroctore 1 No 533Cessna C-37 PC Schoolyard Scale famous 300 plane tar 040/10 power 2-ch spans 42 No 539Slmlear Slow-MotIon 15 PC Tailless flying wing 15 engines spans 60 uses 3-ch PC No 589Electrostreak PC Electric aerobatic plane spans 44 uses 05 motor No 570Busy Bee PP Pee Wee-30 plane 02 power spans 30 has either sheet-balsa bailS-up surfoces No 572TR-260 PC Spsrt Scale Aerobatic plane 4-stroke 60/05 power spoon 50 0 No 576Serendlpityt ndoor EZO record-holder spans 17r/e No 978Schwelzer 1-368 PC Quarter-scale Sailplane spans 125 Two plan sheets. S1475 No 581Gee Bee Model Y PC Golden Age Pacer spans 72 / scale 60 power Three plan sheets 5 No 686Snapdragon PC Fun-fly/sportster 25130 engines spans 45/s No 588 Marlah PC Slope-Soaring Sailplane spars 41 uses 2 OC channels S 425 No 593Taylorceaft PC Sport Scale lightylane boilds standard 2-placer clipped-wing air show stonIer Spans either70h 584 30140 two-stroke 40148 tour-strske engine Two plan sheets no documentationS1000 No 595Span-ow PC Sportster 25 engines spans 43 in5650 No 598coronet 150 PC-Assist Old-Timer enlarged 150 spans 72 uses 40-oize 4-stroke/31t-sioe 2-strake5050 No 601NIckel PC Sportoter engine 3 PC channels Spans 44 in5500 No 603Sparrow Hawk P30 FF Competition robber-power plane won 07 Nato Spans 30 inS225 No 807Cunlsa Seagull PC Giant Scale biplane spans 00 uses QuadralZenoab pnwer Three plan sheets no docS2400 No 809Taperwing PC r/uA Pylon Pacer spans 29/ Plan plus parts template sheet. .. $600 No 610Protobype PC Sport biplane spans 40 uses 45/2-cycle 00/4-cycle pawer. $650 No 812NVCL Dragonfly CL Combat plane all-wood spans 24 reed-valve engine52 00 No 814Electrocutor PC Electdc oportster 05 direct-drive mntor spans 44/u in$575 No 817Push-Pull 240 PC Twin-engine sponster spans 06 in, uses 40 onginesS14 75 No 818Skynlder CL Sport Scale profile plane spans 30 15125 powerS4 75 No 819KeIth RIder R4 FF Scale Golden Age racer rubber power tpans 10 300 No 820Gimlet 40 PC Sport/Pagers plane spans 60 tsr 40/50 engine 2 sheets 51100 No 622QuIck P30 PP Competition rubber-power P-30-class plane spans 30 inS325 No 623Henderson Longater PC Quarter-scale 1033 flivoer spans 93/ 4-stroke 40/48 engine 3 plan sht nodoc $1050 No 624Keleher Lark PC Quarter-scale hnmebuilt spans 60 tsr 60/00 4-stroke power 2 plan sheets no docS1100 No 828Sweepee PC Sport/Paoern canards forward-swept wing spans 64 ones 40 power 2 plan sheets$1300 No 828PrIme cut PC Sport/Aerobatic plane spans 90 uses Quadra 35/40-size power Two plan sheets$1300 No 629P-SiB Mustang CL Mostly-csrdbsard Spnrt Scale craft spans 60 uses 30/40 power Two plans sheets nodoc 75 No 630OrIginal Fly Baby PC Old-Timer spans 72 uses 19125 2-cycle 40 4-cycle power 2 plan sheets$1150 No 631Texas WIldcat CL Profile sport/Stunter based 1920 plane spans SO 35 power$500 No 632P-SiN PP Lubamir Koutnys /55scale Pubber mndel spans 23 in$325 No 633Ores PC Slope Soarer spans 75 uses twist-wing control Twn-ch PC XMTP must have electronic mining$675 No 634SB2C Helldlver CL Profile sport/Stunter spans 54 Far 35/40 power$575 No 836The Gambler PP Indoor Bostonian rubber-power cabin plane opano 15% in$200 No 636Keytwo PC Tn-geared low-wing sportster 20/25 power spans 44 $575 No 637A-B Shrike PP Campetition plane AMA Classes 0 15123 pOwer spans 60 No 636Owl Racer CL Scale Pacer 049 power opons 20 S325 No 636Skyvolt PC Tn-geared Electric aerobatic sportoter 00/15 power spans 50 in.. $050 No 640Bird Prey CL AMA Fast Combat plane 36 power spans 5334 5$5 50 No 841LII 01 Reliable PC Old-Timer sport flier spans S0A engines$575 No 643Bipe 69 CL Partial plan updates deBolts 48 aersion 35cc power Spans 22 in$225 No 643Nodule IiB PP Satlike flylog wing CO pawer spans 30 inS325 No 644Bellanca Columbia PC Schoolyard Scale far 2 PC channels engine Wingspan 46 inS575 No 645Laird Solution CL Profile Scale biplane spans 36 25135 power5575 No 646Winter Hawk PP Psbbsr-pswer Coupe drIlver competition plane spans 47 in$375 No 847Cox Special CL Semiscale biplane r/0A engine spans 34 in$300 No 848CurtIss OC-2 PP Srulls Outdsnr Gas Flying Scsle biplane uses electric power spans 24 HiLios Mini-Smotor S 325 No 649Thingamabob AC/CL Multimode trainer far 25 gas 05 electric power spans Silo$475 No 65047/96 RC Special PC Aerobatic sport plane 40 power spans Olin 3 plan sheetsS1075 No 651 Consortium PC Hand-Launch Hi-Start Glider spans 60 in $ 650 I-reTi Circle numbers plans wish order best handling please include quests payment some other service plans order 193262310314326332386447 460465533539569570572576 o sei 578581586588593595598601 07609610612614617618 o 619620622623624626628629 630631632633634635636637 638639640641642643644645 646647648649650651652653 Plan price includes first Cass postage US delivery Air Mail over 300 miles orders non-US address lease add $250 Air Mail asIa e handlin Ian Make check money order payable US funds drawn US bank Mode/Aviation AMA 1810 Samuel Morse Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ _______________________ NAME ______________ AMA No _____ I STREET CITY UTATE ZIP ____________________________________________________________[v32][b158830467200]]I Another item Steves newsletter John Dvo rak South Bay SS forming associatior Slope Racing fliers West Coast goal establish championship racing series races sites San Diego Bay Area least three races organized Torrey Pines Davenport two majo possibilities Interested fliers can contact John 1638 Farringdon Ct, San Jose CA 95127 tel 1 408/259-4205 Speaking Sportsman Multi-Task Im seem1 more club newsletter accounts SM contests members trepidations first reports tell pretty successful events end day fliers glad tried something different However some CD still suffering misprahapprehension Jimmy Durante used say SMT Contest need run just like F3B definitel idea SMT supposed middle ground tween AMA Thermal Duration contests real F3B Thats reason recoin mended 75-oz maximum gross weight limit aircraft performance somewhat Also recoin mended use AMA Speed Distance task dont use working time hence re launches allowed makes eas ier contest run things go faster o course CDs can use F3B rules withou working times choose SMT new ball game clubs sure itll take couple seasons experienci before consensus what best rules Right now main thing ny Northeast Sailplane Products new mail 01 der business difference three guy run Sal DeFrancisco Stan Eames Jay Kempf devoted Sailplaners gear ing up provide information addition sel ing kits accessories coming os catalog featuring over 70 kits wi feature full descriptions Glider As 5 says product descriptions go beyond simpl copying what kit cover review ttt kits talk people have flown build fly ourselves want people happy kits buy us w provide information necessary person make informed purchase talking Sal phone appat ent lot firsthand knowledge abos Glider kits market both Thet mal Slope NSP approach sounds goo suggest contact Sal 16 Kirt Lane Williston VT 05495 tel 1-802/658-9482 Dawn-to-Dusk event LeRoy Satterlee hI Soaring editor R/C Report magazine sent ale ter outlining novel event would like si get started June July LeRoy envisior teams around country flying san day 700 am 700 pm local time object would keep least Sa plane air continuously next plal must air before previous lands keep clock running clock stops plane isnt flying winning team ot longest total flight time fewe launches team makes 12 hours team responsible keeping own time counting launches Teams interested having go should conta LeRoy ASAP 1604 Huntington Rd Waterlor IA 50701 202 Model Aviation 6 oscJ 2 -V ttfl 03 no 2 zoo Ci2 030 -o 03 s 03 C 0 - 0 C - 03 -03 5 gas 03 0 V 003 as C03 V 003 03 0 2 00 1050 ISO -J03 C03 Isn 03 03 ILto 03

THORNBURG IS BACK RC Soaring less began mid late Sixties pioneers time Dave Thornburg Albuquerque NM considered fellow competition fliers leading Soaring guru through Seventies moved Califor nia closer big action Dave wrote series articles Model Builder magazine late Seventies early Eighties theyve come recognized classics often still see references magazine columns club newsletters Thornburgs 12 Rules Soaring should memorized Glider fliers Dave kind burned out moved back Albu querque has pretty much out Soaring last six eight years So imagine sur prise delight sent word new book titled Old Buzzards Soaring Book letter Dave said rewriting new research chief reason wound up flying field got hooked again thought cured time Dave also mentioned expects cam paigning Max Mills Southwind Glider contest circuit season ship second sure hope will fly upcoming Soaring Masters contest California because ever flier deserved Soaring Master label its Dave press release Daves book During late Seventies early Eighties Dave Bird Time Thornburg contributed over 60 construction articles essays modeling press Now 15 best Soaring pieces have reprinted paperback Old Buzzards Soaring Book jammed tips experts thermal lore contest dos donts programming yourself better land ings ways improve kit models techniques designing own Sailplane book 160 pages includes two Daves classic essays thermal-hunting River Air Perfect Thermal pilots have called River Air single helpful article theyd ever read RC Soaring books first nine chapters focus fly ing last four cover Sailplane design basic aerodynamics Daves nonmathematical ap proach aerodynamics both witty wise ngle formula manages explain airplane flies can make fly better chapters Old Buzzards Soar ing Book originally appeared shorter form Model Builder magazine piece contains new updated material including over 50 new cartoons illustrations comparison charts book intermediate Soaring pi lots rank beginners Dave says wont tell cover wing make test glide over tall grass Old Buzzard folk al ready know fly lk starting think about might fly little better land little consistently compete little successfully contests Also its just fun book curl up rainy night Its full blue skies nd cumulus clouds rising al said hot air Theres chapter two Slope flying case need break pursuit wily thermal Old Buzzards Soaring Book available di rect publisher Pony X Press 5 Monticello Drive Albuquerque NM 87123 price $1495 plus $150 shipping han dling call 1-505/299-8749 Visa MC COD shipment Dealer discounts 10 copies Perfect ThermalThermal lore straight Old Buzzard Happy LandingsThe invisible window makes easy River AirWho has seen Wind Lots people Twelve Hot Tips Thermal SoaringThe col lected wisdom winners Stalking Invisible ThermalHow hunt thermals Glider FlyawayWhat model tries escape Choosing Slope SiteGood slope sites everywhere Fine Art Slope SoaringHow con quer windy hill Ten Ways Lose Sailplane ContestThe 38 Model Aviation Radio Control Soaring Byron Blakeslee 3134 N WInnebago Dr Sedalia CO 80135 Southwind attractive new Standard Class Sailplane kit $75 Max Mills Models Allwood craft receives favorable review months column Want Order Max Dave Ackers generic pod-and-boom fuselage Buzzard Sailplane Photo above shows fuselage Olympic Ii tail feathers bolted provision Oly II wing Photo low has P4B ready V-tail top Pod boom units shown separately bottom Old Buzzards table contents Timbs Engineering has two sizes tow hooks welded Super tow ring avail able Theyre very nicely made details address author Byrons column Dave Thornburgs new book should must list Sailplaner Com plate ordering Information column IIfl Os ORDERS SHIPPED WARBIRDRECEIVED OUR 23RD YEAR ANY TWO VIDEOS ONLY $7595 ANY 3 VIDEOS ONLY $10795 SPE6IAL IMIRODIJIORY OFFER ALLS VIDEOS ONLY $19995 WARBIRD CHECKOUT VOL 1 Flying P-40 Warhawk Corsair FGF Hellcat SB2-A Buccanneer Avenger NF 1325 Programs2 Hr Only $3995 WARBIRD CHECKOUT VOL II Flying P-38 Mitchell Bomber P-61 Black Widow Invader NP 1454 Programs100 Mm Only $3995 WARBIRD CHECKOUT VOL III Flying P-51 Mustang A-20 Bomber P-39 Introduction P-39 Advanced NP 1514 ProgramshO Mm Only $3995 commonest Contest mistakes Part Two DESIGN Sharks fly BetterOn Glider little thingsWARBIRD CHECKOUT VOL V mean lot Some Notes Designing OwnYouFlying B-29 Pre -Flight BI7E Flight B-24 start boring old wing.NP 155-3 ProgramSi 07 Mm Only $3995 Notes Designing Own. andMODERN JET FIGHTER get fun partFlying FIA18 Hornet Eagle F-16 F16C Glib Glossary Glider GibberishA fewand Thunderbird nge words made clearams60 Mm Only think Daves book will godsend Sailplaners have taken up hobby past eight years havent benefit learned shall say uninhibited style writing truly great stuff Heartily recommended Im sure will enjoy Old Buz zard benefit its teachings Southwind Max Mills new Stan dard Class Glider kit market allwood kit available directly Max Albu querque $75 plus postage best way tell about kit print letter old pal Tom Thompson sent describing new Southwind Tom Steve Works helper 1987 US F3B World Champs team knows bit about high-performance Sailplanes Toms letter getting point flying model Sailpianes becoming work play really high-performance Sailplanes get ting too much trouble fly because re quired lot space monofilament line sev eral friends practice F3B Speed Distance Hans Mueller Kings Comets getting too much money import other end spectrum few new exciting Sailplanes build kits well-known standard lines fairly good performing kits didnt want spend lot time building Id rather flying So started build quarter-scale power planes put Soaring back burner day local hobby shop owner said Arent looking sexy Sailplane goes fast lands slow ther mals like F3B didnt know what say course looking kind ma chine some time said Look Sailplane up hang ing ceiling Hanging its beauty piece fishing line 99-in poly winged Sailplane double-sweptback lead ing edge just like F3B ships sleek white fus elage flying stab flaps love first sight next words get Continued page 116 May 1990 39 WARBIRD CHECKOUT VOL IV Flying P-47 3 parts Flying T-6 3 parts NP 1366 Programslb MIn Only $3995 CALL TOLL FREE IT CARDS LiJ Day Night Money Order Check Credit Card Masterwsru vi Shipping Paid Continental US-ForeIgn add $500 0 California residents add 6 1/2% tax NP VIDEO LIBRARY 2554 LINCOLN BLVD #568 MARINA DEL REY CA 90291 RC Soaring/Blakeslee Continued page 39 said new plane being kitted right Albuquerque Sign up said kit beautiful proved just satisfying airplane itself excellent plans great wood handmade ribs fuselage sides formers also very comprehen sive assembly manual What deal Fuselage assembly time two evenings wings took two evenings also spare eve ning working time plane ready fly just two weeks out local soccer field After usual hand launches radio checks trimming launched hi-start went up straight string lowered flaps about quarter inch launch straining hi-start because climbing hard What great launch Now cruise part flight Looking lift reflexed flaps Like shot plane sped forward complete control lost no alti tude made almost complete circle field finally wasthe lift eased little Down flap test out its effect Lo behold plane started rise dramatically thing climbing like elevator Ive found plane really good lift actually flies nose pointed down elevator becomes something rudder because steep angle attack youre flying Yet neutralor small amount Downflap plane will ride smallest bubble air like balloon After full 15 minutes great flying time dreaded first landing usual cautions look traffic set up ap proach started turn base leg feed full down flaps nose pitched up ever slightly plane seemed come con trolled stop air No fighting elevator no panic feeling thing going roll over wing spin just really nice glide soft landing always complete control easiest Sailplane catch Out air have ever flown Well guess lets know easy build fly Southwind much fun Im having flying Im going flying now Thanks scoop Tom Judging photo Toms plane Southwind looks nicely balanced no tricks type intermedi ate-level design specs rudder elevator flap functions 99-in span modified Eppler 193 airfoil 788-sq-in wing area 9-in root chord 45-in tip chord 54-oz dry weight As mentioned above price quite reason able $75 Best call 1-505/292-3510 learn about availability shipping charges ad dress Max Mills Models 3820 Cheraz NE Albuquerque NM 87111 Max has just come out really nicelooking straight-winged ailerons flaps com panion design called Westwind allwood kit foam wing cores priced $125 plus postage should perfect Sportsman Multi-Task-type flying Buzzard Series fuselages Readers Jim Grays fine R/C Soaring Digest will probably have noticed ad back Precision Cores Pleasanton CA proprietor PC gentleman named Dave Acker name implies Dave primarily supplying foam wing cores last years Scale Slope Fun Fly Dave showing some Buzzard Se ries fuselages fuselages nicely made asked Dave info various Buzzards story As deduced conversations Kennewick am very excited about Buzzard series actually group three Gliders de signed use same fiberglass fuselage fuselage will allow wing attached rub berbands bolt-on plug-in fuselage pod-and-boom design boom can cut whatever length desired builder can used almost unlimited variety Glider stzes first configuration called Baby Buz zard intended transition ubiqui tous Oly II Olympic 11Ed similar Glider will allow new flier transfer wing stab fin/rudder standard-sized radio gear smaller cleaner sexier Buzzard fuselage cluded set plans instructions construction tail platform Oly stab can bolted place bolt-on tail option Oly II kit second version called Silver Buz zard intended wonder what would happen t What changed wing shape size airfoil allows modeler try out new wing configuration having build completely new Glider what about tail feathers would old Glider fly flying stab tail s jut WQI*1fl9 Eon Srut Vornier PO-X o 00S tail Another area individual creativity method wing attachment bolt-on vs plug-in ideas can tried out As Im looking something will survive 800-ft vertical landing Its intention provide representative plans various wing attachment tail con figurations Also since tail areas based overall Glider dimensions include propor tional table will allow builder increase decrease tail areas match particular Glider size table conservative side pro vides something will work may optimal design Again keep new fliers going too far afield third version 01 Buzzard perhaps closest heart obvious rea sons hobby strangely enough seems generate orphan parts have several good wings tails required fuselages Good heavens have some old Free Flight wings around 01 Buzzard fuse lage will allow put stuff back air can also try convince new kids sembly old parts latest design break throughs Case point latest Schuemann wing planform used very successful Free Flight 1940-50 era Another thing person ally require forgiving Glider reasonable performance need something can take eyes off look transmitter look back sky expect find Glider left Some newermore efficientGliders re quire complete concentration same time have some ideas would like try out requires basic test bed can ac curately compare some new airfoils 01 Buzzard comes generic shaped foam wing cores cores will allow construc tion wing span up 144 Cur rently available airfoils S3021 S4061 E193 E205 Others will added demand dic tates Buzzard fuse really doesnt look like podand-boom because pod part has gradual taper joins boom very nice job Daves introductory prices three series de scribed above very reasonable $45 $50 $80 respectively plus shipping two-piece white foam cores Dave charges $25 plus $6 shipping Two-Meter $35 plus $8 100 $45 plus $10 up 120 no charge templates desired root tip chords exactly half-inch incre ments Just about standard airfoils computer hard-to-find goodie Dave sells As-thick obechi wing skins $8 10 x 72in size Longer wider sheets available request Call him full information 415 462-0672 The address Precision Cores 850 Concord St Pleasanton CA 94566 Tow hooks Timbs Engineering first lets backtrack second Did notice new paragraph 91 page 90 1990-91 AMA Competition Regulations aka rule book states disconnect switch now re quired positive cable winch motor new rule competition winches makes sense fact battery disconnect switch should standard item winches because can save plane winch starts run away important can preclude battery ex plosions hooking up battery winch shutting off runaway winch Last month featured Norm Timbs industrialstrength winch cutoff switches solenoids Continued page 198 116 Model Aviation Bill Efflngr * says Only Plan n Patterntta Sate gina yea aseerted dasigne yeo want have selected beet claaoic design ef Owe yee ckteeeetrern pattern part impertent enclosive featore One-Third Scale Piper Tn-Pacer PA-22 wing span eq wing atea20 30 cid engines channel RIC oc 12 lbs /8 overall length PlywoodIbalsa fuleelage removable wing panele eteerable uinee whani easy groond handling anthentic scale flight performance 1029gB Scale Piper Cub J-3 wing open ength sq wing area s4ch RIC 20 -30 cid engines - RC3S-2 6 Quarter Scale WWI SE-5A 80 5 span eq wing areas lgto22angines RCOS-7 5 SPAD C-XIII 7914wingspaes2t20sqin wingareael3to3t engines Capable ever- neptsran imagination FOKKER DR-i TRIPLANE 72wingepanr eq wingara 7gtolsoerngnes RCOS-6 6 SOPWITh CAMEL F1 St wing span 0 eq wing area 11 lbs wle RIC wood & halea cenenousso ever $heq ft drawings RCOS-ll 6 Quartet Scale WWI Fokker D-VIINew Li1 50 wingspan sq wine area 00 25 cid evolve oh ecoss 5 Poll cantriwer wings eying wiresi Removal engine ash Shook woonted landing gear Sainelplymood fsneloeo boils-op blaso wine Bitt Offlegen Peseding Meerhar AMA NPPS Hall Power Prices comylee plane sob osoembly 5 denailed paris lists PLEASE AOD $2 Oft shipping Irnailieg rebel Sow lens Plan Sets broohorO 51 refundeble coo hot mOm WE TECHNICAL SERVICES Rt 1 Box 2900 Sante Rogg Beach FL 32459 ily public involvement see article Involve Community ri July 1987 Model Aviation field lost no outsider can assistance search new site must spearheaded local people dealing local government insti tutions another gain accept ance assistance communi ty club has become integral part community youve made yourself welcome stay community wonit have work way back emergency strikes Key City Bald Eagles made themselves welcome part community paid off clubs new flying field ultimately located through club member owns farm service business didnt limit talk about Bald Eagles plight club meet ings mentioned people met workaday world such individual John Gustafson learned clubrs situation John told us father late Harold Gustafson aviation enthusiast built airstrip farm Johns Cessna 170 also enjoyed watching model airplanes fly John also thought would nice see miniature planes flying Cessnas airstrip wasnt long needless say before Bald Eagles invited set up fly ing field Gustafson farm mem bers set work immediately cutting down trees leveling land planting grass putting culverts drainage initial work done fall other work could continue spring members came out force level go pher holes remove frost-pitched rocks repair other winter damage porta-potty set up phone lines brought inan important safety factor public facility Later summer shelter built course soon weather permitted development activities interspersed flying sessions September 1989 Harold Gustafson Memorial Flying Field officially dedicated fun fly Harolds widow Betty shared love aviation John Gustafson carry farm other busi ness ventures very proud see airstrip used RC flying field farm airstrip converted ac tive RC flying field benefiting club also community whole Key City Bald Eagles Mankato can take pride flying facility can just proud cooperative efforts securing developing ideal site Bald Eagles join saying Thanks Harold think people Mankato agree responding advertisers mention thatyou read about ModelAvlatlon RC Soaring/Blakeslee Continued page 116 Normis switch solenoid priced $22 postpaid month t want show Norms new product calls Super Tow Hooks nicest tow hooks Ive come across think youll like Europeans dont have tow hooks like made light weight aircraft aluminum welded together Norm says will rotate twist un screw flex bend like wire tow hooks handle powerful winch launches ease standard model weighs 48 grams cluding three half-inch 2-56 stainless steel flathead machine screws requisite flat wash ers nuts triangular layout dimensions mounting hole layout 10 x 045 heavy-duty model weighs 115 grams about 284 grams per ounce four same-size bolts rectangular mounting hole pattern 1125 x 0625 Introductory prices $325 $450 post paid respectively order throw extra buck three Norms Super Tow Rings Its always good keep few spare rings field box years live made tow hooks bent com mon nails either 8-32 10-24 machine threads thread blind nut inside fuse locknut outside Mr Murphy predicted once step up winch blasted hook loose beauty Timbs tow hooks Continued page 200 SUPER FAST RECOVERY SYSTEMS Making Flight Failsafe C Superiority Rocket Fast Deployment Cost effective means insuring aircraft & its gear e Avoid fatal mishaps Great novice expert IFL has Recovery System Fit Aircraft SPECIFY ENGINE SIZE Plans Send lees Kit Send j99e5 Plus 200 Shipping & Handling PO BOX 629 HUDSON WI 54016 198 Model Aviation ~fnIIfl1UiC ADDS UP TO piiiigiii IllBETTER PERFORMANCE N YROD THE ORIGINAL 1b& PUSH ROD COMPLETE WITH AU REQUIRED METAL __________________________________ FITTINGS IDEALLY SUITED FOR ANY PUSH ROD ACTION RUDDERS ELETORS AILERONS THROTTLE HAflDRh#4CLUOED t5iAi CONTROL BOATS SEA PLANES.iVUR14vNvROOter IMAGINATIONir ROdwith 2-56 Threaded end 34 LONG ASSEMBLED LENGTHCat NYROD 5UPR-L3UPR0OuC mc issee Samoa Runs 4 E F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including 3/ ply firewall installed wing design formea ABS Gull covering makes wing snap build Built up tail feathers Complete hardware decals Complete instruction booklet plans 71 span 58 length 920 sq wing area 35 oz per sq ft wing loading Weight 14 16 lbs Power 80 108 two cycle 12- four cycle should never come loose pull out stan dard should fine Gliders up size Lovesong heavy-duty job meant X-C ships F3B planes realty put load winch snag foresee hooks mounting flat base round-bottomed fuse lages especially fiberglass ones between some thin wedge-shaped shims squeezing fuse little should work OK standard hook isnt too wide anyway Make sure use least 3/6-thick plywood plate inside fuse three four inches long shaped wide possible transfer loads sides fuselage Nothing embarrassing doing nice zoom launch pulling out bottom fuselage Order Timbs Engineering 1672 Los Osos Valley Rd Los Osos CA 93402 tel 1805/528-5420 Soartech #8 Airfoils Low Speeds Ive poring over book couple months let tell very tmpres sive effort Michael Selig John Donovan David Fraser book commercially printed inch thick contains 398 pages Most pages given coordinates data graphs 53 different airfoils authors tested wind tunnel Princeton University Actual reading material about 55 pages half being explanation test methodol ogy part think modelers will find inter esting Comments Airfoils au thors discuss important characteristics re spect other airfoils Following other sections discuss stall havior tips surface roughness trailing edge thickness surface waviness contour accu racy discussion Quabeck HQ2/9 contains important tidbit information differ ences between nominal HQ2/9 RGl5 S2048 small Moreover differences same order differences between nominal airfoils models HQ2/9 RUIS S2048 actually tested other words modelers cant build wings accurately enough tell difference tween airfoils similar design quest latest unbeatable airfoil month turns Out largely psychological Nonetheless theres enough material book keep Soaring Hot Stove League boiling years Soartech #8 can ordered editor/publish er Herk Stokely 1504 North Horseshoe Circle Virginia Beach VA 23451 cost $15 US Canada $20 overseas postpaid surface mail book has dedicated Sailplaners bargain century Sailplane Design computer program another great bargain Sailplaners own IBM PC clone put out same David Fraser coauthored Soartech #8 played large role success airfoil testing pro gram Princeton David wrote first program several years ago Version 30 added Princeton data revised manual reflecting new version latest November 89 ver sion 32 has VGA graphics plotter sup port few stored airplane designs As Ive mentioned before Im compulsive kit builder policy leave designing experts find its still fun play pro gram see effect changing airfoils weights etc Sailplaners enjoy designing own ships can hardly function days computer design program Davids version 32 $35 US Canada US $37 elsewhere either 525- 35-in disks Version 31 owners can updated no charge version 30 $6 earlier versions $12 Write David B Fraser 1335 Slayton Dr Maple Glenn PA 19002 Some new events An item caught eye Wind newsletter Santa Maria CA club Steve Bircher editor wrote about Joe Wurts telling him really neat contest Joe re cently flew Hand-Launch Speed Its 50yard course Base Base B back like F3B SMT best try two-minute window counts Joe said didnt say contest CD real sadistonly last try counted gamblers choice sure Go better time stand pat good ve also described Sportsman Multi-Task SMT contest Santa Maria ran December won Unstoppable Joe W Steve went wonder Hand-Launch SMT event might work Sounds like great idea Steve fact HL plane designed Speed Dis tance well Duration might well lead whole new type Glider Ships would have HL size capable faster flying Steve remarked Santa Maria club should also put Slope race F3F style can get going Slope Racing getting doors blown off pros about Slope Racing HL Multi-Task size Gliders Sometimes race day isnt enough wind lead-sled Racers So being prepared race smaller lighter weight Gliders may make sense Any comments Continued page 202 200 Model Aviation AVI order call write 74 GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio U060 /216 953-1188 GUNFIGHTERS * POSITIVE FEEL * USED BY TOP PILOTS * FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO Alunilnum/BrasslCopper Tubing & Shapes Music Wire Too OSoldenng Irons 0 Finishi Send 25 Waft No 652 Der Fledermaus$675 RO Low-wing sport plane 20/25 power spans 55 No 653 Avanti$575 CL Profile Sport Scale canard bizliner twin 049s spans 381/2 No 193StIletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs No 262crashmaster CL Crash-proof trainer two sizos15/30 35/40 power 5 No 3101930 Fleet Biplane PC Sport Scale 35140 4-channel Wingopan Shin /n scale Two sheets No 314Drake II PC Ken Willards flying boat 3-channel owor Fly land removable gear 5 No 328Taylor cub PC Don Srolls Schnolyard-Scale 049s 2-3 Channel Spans 50 No 332Zephyr PC Small 2-channel glider hand-launch tow thermal slope snaring $200 No 386Laser 200 PC Sport Scale replica clrampionohip Aerobatic flier Uses 40 power 4-S channel Two sheets 5 No 4471/2A Misa AmerIca PC Old-Timer r/0 Texaco model 049 glow 2-channelo 0 No 4804-40 PC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels 0 No 469Blue Max II PC Fun-fly sportoter 40-sloe engines spans 52 Lightweight otroctore 1 No 533Cessna C-37 PC Schoolyard Scale famous 300 plane tar 040/10 power 2-ch spans 42 No 539Slmlear Slow-MotIon 15 PC Tailless flying wing 15 engines spans 60 uses 3-ch PC No 589Electrostreak PC Electric aerobatic plane spans 44 uses 05 motor No 570Busy Bee PP Pee Wee-30 plane 02 power spans 30 has either sheet-balsa bailS-up surfoces No 572TR-260 PC Spsrt Scale Aerobatic plane 4-stroke 60/05 power spoon 50 0 No 576Serendlpityt ndoor EZO record-holder spans 17r/e No 978Schwelzer 1-368 PC Quarter-scale Sailplane spans 125 Two plan sheets. S1475 No 581Gee Bee Model Y PC Golden Age Pacer spans 72 / scale 60 power Three plan sheets 5 No 686Snapdragon PC Fun-fly/sportster 25130 engines spans 45/s No 588 Marlah PC Slope-Soaring Sailplane spars 41 uses 2 OC channels S 425 No 593Taylorceaft PC Sport Scale lightylane boilds standard 2-placer clipped-wing air show stonIer Spans either70h 584 30140 two-stroke 40148 tour-strske engine Two plan sheets no documentationS1000 No 595Span-ow PC Sportster 25 engines spans 43 in5650 No 598coronet 150 PC-Assist Old-Timer enlarged 150 spans 72 uses 40-oize 4-stroke/31t-sioe 2-strake5050 No 601NIckel PC Sportoter engine 3 PC channels Spans 44 in5500 No 603Sparrow Hawk P30 FF Competition robber-power plane won 07 Nato Spans 30 inS225 No 807Cunlsa Seagull PC Giant Scale biplane spans 00 uses QuadralZenoab pnwer Three plan sheets no docS2400 No 809Taperwing PC r/uA Pylon Pacer spans 29/ Plan plus parts template sheet. .. $600 No 610Protobype PC Sport biplane spans 40 uses 45/2-cycle 00/4-cycle pawer. $650 No 812NVCL Dragonfly CL Combat plane all-wood spans 24 reed-valve engine52 00 No 814Electrocutor PC Electdc oportster 05 direct-drive mntor spans 44/u in$575 No 817Push-Pull 240 PC Twin-engine sponster spans 06 in, uses 40 onginesS14 75 No 818Skynlder CL Sport Scale profile plane spans 30 15125 powerS4 75 No 819KeIth RIder R4 FF Scale Golden Age racer rubber power tpans 10 300 No 820Gimlet 40 PC Sport/Pagers plane spans 60 tsr 40/50 engine 2 sheets 51100 No 622QuIck P30 PP Competition rubber-power P-30-class plane spans 30 inS325 No 623Henderson Longater PC Quarter-scale 1033 flivoer spans 93/ 4-stroke 40/48 engine 3 plan sht nodoc $1050 No 624Keleher Lark PC Quarter-scale hnmebuilt spans 60 tsr 60/00 4-stroke power 2 plan sheets no docS1100 No 828Sweepee PC Sport/Paoern canards forward-swept wing spans 64 ones 40 power 2 plan sheets$1300 No 828PrIme cut PC Sport/Aerobatic plane spans 90 uses Quadra 35/40-size power Two plan sheets$1300 No 629P-SiB Mustang CL Mostly-csrdbsard Spnrt Scale craft spans 60 uses 30/40 power Two plans sheets nodoc 75 No 630OrIginal Fly Baby PC Old-Timer spans 72 uses 19125 2-cycle 40 4-cycle power 2 plan sheets$1150 No 631Texas WIldcat CL Profile sport/Stunter based 1920 plane spans SO 35 power$500 No 632P-SiN PP Lubamir Koutnys /55scale Pubber mndel spans 23 in$325 No 633Ores PC Slope Soarer spans 75 uses twist-wing control Twn-ch PC XMTP must have electronic mining$675 No 634SB2C Helldlver CL Profile sport/Stunter spans 54 Far 35/40 power$575 No 836The Gambler PP Indoor Bostonian rubber-power cabin plane opano 15% in$200 No 636Keytwo PC Tn-geared low-wing sportster 20/25 power spans 44 $575 No 637A-B Shrike PP Campetition plane AMA Classes 0 15123 pOwer spans 60 No 636Owl Racer CL Scale Pacer 049 power opons 20 S325 No 636Skyvolt PC Tn-geared Electric aerobatic sportoter 00/15 power spans 50 in.. $050 No 640Bird Prey CL AMA Fast Combat plane 36 power spans 5334 5$5 50 No 841LII 01 Reliable PC Old-Timer sport flier spans S0A engines$575 No 643Bipe 69 CL Partial plan updates deBolts 48 aersion 35cc power Spans 22 in$225 No 643Nodule IiB PP Satlike flylog wing CO pawer spans 30 inS325 No 644Bellanca Columbia PC Schoolyard Scale far 2 PC channels engine Wingspan 46 inS575 No 645Laird Solution CL Profile Scale biplane spans 36 25135 power5575 No 646Winter Hawk PP Psbbsr-pswer Coupe drIlver competition plane spans 47 in$375 No 847Cox Special CL Semiscale biplane r/0A engine spans 34 in$300 No 848CurtIss OC-2 PP Srulls Outdsnr Gas Flying Scsle biplane uses electric power spans 24 HiLios Mini-Smotor S 325 No 649Thingamabob AC/CL Multimode trainer far 25 gas 05 electric power spans Silo$475 No 65047/96 RC Special PC Aerobatic sport plane 40 power spans Olin 3 plan sheetsS1075 No 651 Consortium PC Hand-Launch Hi-Start Glider spans 60 in $ 650 I-reTi Circle numbers plans wish order best handling please include quests payment some other service plans order 193262310314326332386447 460465533539569570572576 o sei 578581586588593595598601 07609610612614617618 o 619620622623624626628629 630631632633634635636637 638639640641642643644645 646647648649650651652653 Plan price includes first Cass postage US delivery Air Mail over 300 miles orders non-US address lease add $250 Air Mail asIa e handlin Ian Make check money order payable US funds drawn US bank Mode/Aviation AMA 1810 Samuel Morse Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ _______________________ NAME ______________ AMA No _____ I STREET CITY UTATE ZIP ____________________________________________________________[v32][b158830467200]]I Another item Steves newsletter John Dvo rak South Bay SS forming associatior Slope Racing fliers West Coast goal establish championship racing series races sites San Diego Bay Area least three races organized Torrey Pines Davenport two majo possibilities Interested fliers can contact John 1638 Farringdon Ct, San Jose CA 95127 tel 1 408/259-4205 Speaking Sportsman Multi-Task Im seem1 more club newsletter accounts SM contests members trepidations first reports tell pretty successful events end day fliers glad tried something different However some CD still suffering misprahapprehension Jimmy Durante used say SMT Contest need run just like F3B definitel idea SMT supposed middle ground tween AMA Thermal Duration contests real F3B Thats reason recoin mended 75-oz maximum gross weight limit aircraft performance somewhat Also recoin mended use AMA Speed Distance task dont use working time hence re launches allowed makes eas ier contest run things go faster o course CDs can use F3B rules withou working times choose SMT new ball game clubs sure itll take couple seasons experienci before consensus what best rules Right now main thing ny Northeast Sailplane Products new mail 01 der business difference three guy run Sal DeFrancisco Stan Eames Jay Kempf devoted Sailplaners gear ing up provide information addition sel ing kits accessories coming os catalog featuring over 70 kits wi feature full descriptions Glider As 5 says product descriptions go beyond simpl copying what kit cover review ttt kits talk people have flown build fly ourselves want people happy kits buy us w provide information necessary person make informed purchase talking Sal phone appat ent lot firsthand knowledge abos Glider kits market both Thet mal Slope NSP approach sounds goo suggest contact Sal 16 Kirt Lane Williston VT 05495 tel 1-802/658-9482 Dawn-to-Dusk event LeRoy Satterlee hI Soaring editor R/C Report magazine sent ale ter outlining novel event would like si get started June July LeRoy envisior teams around country flying san day 700 am 700 pm local time object would keep least Sa plane air continuously next plal must air before previous lands keep clock running clock stops plane isnt flying winning team ot longest total flight time fewe launches team makes 12 hours team responsible keeping own time counting launches Teams interested having go should conta LeRoy ASAP 1604 Huntington Rd Waterlor IA 50701 202 Model Aviation 6 oscJ 2 -V ttfl 03 no 2 zoo Ci2 030 -o 03 s 03 C 0 - 0 C - 03 -03 5 gas 03 0 V 003 as C03 V 003 03 0 2 00 1050 ISO -J03 C03 Isn 03 03 ILto 03