Radio Control: Soaring

Soaring ConoiByron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 TOLEDO SHOW 35th Annual Radio Con trol Exposition yes started 1955 held April 7-9 1989 crowds usual huge size exhibitors said business better ever great RC hobby its facets just keeps growing growing However few really new things Gliders Bob Sealy s booth center assem Toledo scenes L Bob Scaly stands next new Pulsar 100-in design 129-in.span Ultima left Both Thermal Soarers info column Sigs Mike Pratt R prototype Ninja Slope Soarer Model black yellow/orange/red trimvery striking Dave Mroz L demonstrated Sucker Pump evacuates vacuum bags Dave partner Noal Rossow formed Composite Aircraft Engi neering & Supply provide provide tools materials vacuum bagging Gentleman far right R American Sailplane Designs owner Gary Anderson Hes holding fuselage toy-sized ASW-20 Fellow left Rainar Weibaick High Sky Thermal Navigator electronic variometer Device invades rudder-servo circuit polyhedral-type Soarers turns plane right left indicate its ascent descent TV name John Hoovers Burton MI design L Name comes V-tail atop short fin Aerospace Composites carbon fiber tow R captured between layers nonwoven glass cloth good reinforcement foam wings Epoxy can easily soak through carbon strands 48 Model Aviation Radio bly Sailplane fanatics see talk overBobs new design Pulsar June column photos description See ing live lets appreciate what fine looking nicely proportioned ship Pulsar much like 100-in version Bobs Ultima same Schuemann-style wing planform However balsa-sheeted foam core two-piece wings plug fuse lage stab low fin one-piece fiberglass fuselage beautifully made quite light has same type slip-on nose cone Ultima Id better explain last one-piece fuse bit Ultima fuselages come two forward rear pieces slip joint just behind wing builder epoxies halves together fills joint line prior painting Pulsar can built either polyhedral wing rudder/elevator control straightwing-with-aileron versions suspect build ers will opt straight wings installa tion ailerons flaps means bit con struction get plane versatile fun fly should good new Sportsman F3B S3B Class Bob coming out stretched wing 124 version called Laser course build ers can cut down cores make size wing fancy 112- 118-in spans would also make nice sized Gliders Pulsar kit $129 Laser $149 Both postpaid direct Bob Also works quarter-scale Reiherstay tuned Bobs address 521 96th Lane NE Blame MN 55434 telephonel 612/780-2737 Bob Pam expect moving Tennessee late summerwell pass along new address later Sig Manufacturing Co s booth Mike Pratt showing new all-wood Slope Soaring design should out soon Its called Ninja Si lent Assassin Mike also designed Riser 100 says 60-in-span Ninja good allaround Slope flier should excellent ginners throwing planes off hilltops No price delivery info yet Dynaflite s booth also host Mark Smiths new 100-in Apogee Mark himself able attend show Apogee light 25 3 lb all-wood design using welltested Eppler 205 airfoil trendy Schuemann style wing good news lists $5995 Continued page 165 Fourmost Fuselage Fixture Mark II Fourmost Fuselage Fixture Mark II designed auto matically align fuselage structures built strings measuring eyeballing Price $5995 Simply slide four centering brackets track until align fire wall tail joint two bulkheads Clamp fuselage together lightly rubber bands structure will straight ready gluing Fixture will accomodate fuselages long four feet wide eight inches eight inches Please Include $400 Shipping l{andling direct ordera FOURMOST PRODUCTS 4040 24TH AVEFOREST GROVE OR 97116 I HE III Polyhedral $4495 Aileron $5195 Paul Wilson holds class distance record 66 miles 59 wing span zIsq h up Eppler 214/Seling 4061/Airfoil choice BE WINNER ORDER TODAY 5031 357-2732 -HIGH QUALITY SAILPLANE KITSTerry Edmonds mulli-task sailplanes 10 2 meter 39 oz & up CALLISTO-standard class 44 oz & up CULPEPPER IZ MODELS INC 2526 Washington DubuqueIA 52001 3191583-4830 WASHINGTONS AMA BASE. $ j per couple per rnght Check day Minimum stay 2 nthts Free Parking Cars Free Full Breakfasts Free Metropass Sat Sun Free DC Area Map Free Harrington Hawk Cafeteria & Cafe /C*717/#fl, 11th & E Streets NW Washington DC 20004 c~ 0-424-8532 628 81400mJk3/l August 1989 49 SR Batteries new mini-sized RC Tool Kit especlaily good Allen-type hex-head screws case holds screwdriver handle ratchet extension dozen inch-size 6 metric-size Allen drivers well Phiilips head slotted-head screwdriver bits Designed Rusty Shaw LeRoy Satterlee *AMA MEMBER RATE Tax included COMPOSITE MATERIALS BORON 004 dia KEYLAR CLOTH 10 oz 17 oz 36 oz KEYLAR THREAD -22 lb test x 010 dia CARBON FIBER TOW 6000 12000 strand CARBON FIBER PAPER 05 oz per yard CARBON FIBER UNIDIRECTIONAL CLOTH ide CARBON FIBER TAPE -5 wide CARBON FIBER SHEET STOCK 016 thick CARBON FIBER SPAR MATERIAL irectional thick CARBON FIBER FIBER ROD irectional dia MICROFILM mskys best gold film 00012 thick INDOOR MYLAR 59 thick MYLAR HEAT SRINK COVERINGS 0015 thick adhesive METALIZED MYLAR 0005 thick gas bags ALUMINUM WING SKINS thick FAI free flight models FOAM CUTTING WIRE dia Stainless Steel-200 Ft Rolls REAL SANDING SEALER ds best lider polish 3Ms #465 WING SKINNING TAPE acrylic adhesive tape form ENGINES AND THE BRAND NEW LINE OF es COMPETITION ENGINES leading supplier composites worlds modelers FOR COMPLETE CATALOG SEND $200 TO eae ee Model Research Labs 25108 Marguerite #160 Mission Viejo Ca 92692 Short Sunderland huge four-engined fly ing boat served RAF Coastal Com mand 1938 1955 hunting subma rines downed fliers Supermarine Seagull 1930s single-engined biplane fly ing boat used air-sea rescue Westland Lysander sturdy ground support type often used drop Allied agents supplies underground Fiat CR42 Falco pretty Italian biplane fighter shot down captured 1940 collection also boasts Heinkel 111 standard German medium bomber just two surviving examples Junkers Ju-87 Stuka first widely used dive bomber became easy target RAFs fighters Junkers Ju-88 best German medium bombers rare early example shot down restored Messerschmitt Bf-109E standard Ger man fighter Messerschmitt Bf-l 10 twin-engined German fighter no match Spitfires Hurricanes Battle Britain Museum building located left parking lot also houses Roundel restaurant museum-goer will find snacks complete meals Dedicated Scale modelers needing accu rate data project may want contem plate pilgrimage RAF Museum contacting Richard Simpson Keeper Aircraft Exhibits should part advance planning Simpsons permission youll able cross spectator barrier close-up look prototype youre interested Any interested support ing work museum can join its So ciety Friends 500 pounds about $9 per year Membership details available Secretary Society Friends RAF Museum Hendon NW9 5LL Eng land RAFs huge collection air craft reserve collections RAF bases throughout England Some can visited get special permission ad vance its British military air craft turn place see Hendon RC Soaring/Blakeslee Continued page 49 Mark flew plane recent Soaring Mas ters about tied lead tried patented touch-and-go landings stop clock make spot landing Im told plane touched didnt go Mark missed landing dropping him eighth place Al winning Masters testimonial Apogee its prudent point out Mark could fly manhole cover still win con testshes good Lets hope some Marks skill will come packaged kit American Sailplane Designs SD booth housed San Diegos Gary Anderson said business has steadily growing im provements arc being madeincluding tele phone great news customers wishing check kits stock Garys inventory cludes smallest largest American-made kits can buy both Thermal Slope swears little toy ASW-20 fuselage hes holding photo will fly Gary also makes third-scale ASW 20 kit wingspan 197 164 ft Gary can reached 2626 Coronado Ave #89 San Diego CA 92154 telephone 1-619/429-828 1 Also manning ASD booth Rainar Wei balck designer manufacturer amazing Thermal Navigator ingenious gizmo tells plane going up down automat ically turning plane way its rising other way its descending actually microsized variometer electronic amplifier plugs between receiver rudder servo assuming youre flying rudder/elevator polyhedral-wing ship transmitters rudder stick will override TN can steer plane spite way Navigator wants go Get info Rainer High Sky 3929 Kansas St #9 San Diego CA 92104 telephone 1-619/297-5792 Robbe s new Gliders 10-in-span Ha bicht Hawk far-out-looking Vampire flying wing Habicht has Plura plastic fuse lage Jedelsky-type solid balsa wing Vampire looks fast just sitting its said actually medium-speed flier quite easy handle German imports highly prefabricated kits prices reflect time work save putting together Habicht kit $150 Vampire $200 Both prices re I&O UIbINtO AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOtH K&B Micro-Balloons FILLER K&B SUPER FOXY RtSIN K&B SUPtR FOXY THINNER K&B SUPtR FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS 989 UnlbedV LCv AUGUST 20 eStatic Display Fun Fly Swap Shop Air Show Team Competition r Information Call Fo SHOW August 1989 165 WORLD WIDE SINCE I9O 9 AJ INTERCEPTOR IRTF *760 *596 COMPANY PO Box 68132 Portland OR 97268 WOULD YOU FLY IN PLANE THAT HAD NO GAS GAUGE OF COURSE NOT thats hIL what youre doing havent measured the performance receiver batteries BATSTAT 1000 youll REALLY know long can confidently fly full charge BATSTAT performs safe automatic discharge test allows calculate reciever packs capacity Order BATSTAT 1000 sending $1455 plus $200 Postage & Handling Model Safety Enterprises Department M 13127 Kellam Ct 1F32 San Diego CA 92130 Specify Futaba Imodel Airtronics universal test connector DONT GUESS! TRUST THE PREVENT CRASH II ORDER ILiE C BATTERY STATUS TESTER TODAY Allow 3-4 weeks delivery year warranty must completely satisfied return within 30 days courteous refund Dealer Inquiries welcome fleet price reductions approximately 15% Toledo Specials can get men tioning saw See Robbe ads info address direct order Hobby Shack has taken big jump Glider business becoming US distributor complete line Sailplanes International kits Britain moment include five Slope ships three Thermal kits range price $75 100-in all-wood Osprey $340 glass-and-foam 1 18-in ASW-20 Scale ship Check HS ads complete infor mation SR Batteries Larry Sribnick some new bat teries neat minisize tool kit new 700 Series cell same size ordinary AA 500 mAh cell has capacity 725 mAh cell primarily designed transmitters space battery pack limited flier wants flying time can get going external 900 Series pack 700 Series pack can made shape almost connector pack can used make model transmitter cost eight-cell pack $4695 plus addi tional $4 connector required SRs RC Tool Kit high-quality set 18 hex drivers six metric two Phillipshead three slotted-head screwdrivers ratchet handle screwdriver handle extension adapter A-in-drive sockets kit $2695 plus $3 shipping Other interesting stuff show new breed computer radios increasing range composite materials vacuum bag ging supplies Ace R/C showing prototypes new computer radio should available sum mer Airtronics its new Vision radios low Composite Aircraft Engineering s Dave Mroz doing vacuum bagging demos handoperated Sucker pump people lined up 14 deep watch CAE Sucker-Kit sells $5995 includes items required get started new bagging CAEs VHS Show Tell video highly recom mended Its $3995 will save price times over avoided mistakes See CAE ad magazine full information Aerospace Composite Products George Sparr also doing big business ACP first offer aerospace industry composite materi als modelers has large very com prehensive line includes carbon fiber tow mat rods laminates weights Key lar fiberglass cloth tape epoxy res ins SASE George Box 16621 Irvine CA 92714 will get 10-page list exotic products Airtronics showing its exciting new Vision 85P radio just starting delivered time Delivery delayed awaiting availability new very detailed instruction manual Visions ATRCS pronounced Tracks computer-encoding capability heart system completely eliminating pots reversing switches ATRCS provides features requires fairly extensive owners manual explain ATRCS hardit isnt extremely comprehen sive cant think anything full gamut model Sailplanes rudder/elevator F3B eight-channel Scale should capable ing ATRCS cant programmed handle talking Bob Renaud said Airtronics recognized problem trying explain ATRCS features magazine ads cant done So unprecedented service prospec tive purchasers card call Airtronics will get complete instruction manualthe same included set Only reading through whole manual will get full pic ture what Visions ATRCS computerencoding system will overlooked Vision set new Model 985 FM dual-conversion PCM Super Narrow Band receiver 1991 state-of-theart receiver Also included four 831 heavyduty ball bearing miniservos good size Gliders Ive flown Camano long range Vision RCI6 frequency scanner picking up fairly strong commercial data transmis sion just 10 kHz below RCl6s 7211 MHz ap pears anyway commercial broadcast ing between channels will have pretty close and/or strong cause problems 985 receiver review little history Control Systems Labs originally designed ATRCS computer en coding Sailplane program offered $300 conversion Airtronics Module 75P transmitter ATRCS conversions success ful popular Airtronics purchased rights opinion great move Airtronics part Vision 85P first radio set designed specifically ATRCS CSL continues work Airtronics has written new program 166 Model Aviation wR/C IHANGAR [J CATALOG IKits OR Plans Innovative expensive Quick & Easy Build HORNET 074 Order yours today QIJ1cK&LIVY SPORTSEND $2 Specificatioma Wing lpao 26 Wang Are~ 275 Sq Incatalog free orderl Leogth 25 Loading 13 Oz/lq Ft Weight 11/2 Lbs aileron traimer qualifies pilot sleek lookI Radio 4-Chaooel micro servos Oxpee-lence lane Simple durable rectangular 2-spar sheeted wings sheeted box type fuselage solid tail surfaces pre-cut AAA balsa ply fullsize illustrated plansSTANGEL ENTERPRISES romplete instroctions hardware package wheels 0cc BOX 330 Ml WAUKESHA WISCONSIN 53187 0336 ICIT/plama$4995*5350 5611 Flat Only $995 5l5O s6flU MEMBEREAA n AOPA AM Pattern planes 8P version think will have Helicopter version out later things considered have hunch Vision 8SP will become peoples choice sophisti cated Sailplane radio First annual Soaring Masters contest sig nificance contest first what hoped will long line Thermal Du ration contests truly top fliers sport Masters sponsored National Soar ing Society NSS Pete Carr president Thousand Oaks SS Miles Moran president CD unique thing about Soaring Masters concept like Masters Golf Tourna ment requires qualifications entry Contes tants must LSF Level IV V have won significant contest like Nats 23 entrants 1989 mostly Cal ifornia nevertheless read like Whos l4io Soaring Personally think great Up now its possible top guns get together fair shootout see really best best stop think about com petitive RC Soaring hasnt around very longless 20 years Some guys Masters like Mark Smith Larry Jolly Terry Koplan go back almost beginning Having chance see guys compete some thing tell grandchildren about occasion best Joe Wurts rel ative youngster surprising outcome cause Joe has winning just about everything California over past couple years Ill have Joe below top 10 Joe Wurts48228 984% 2 Fred Weaver 48111 982% 3 Larry Jolly48057 981% 4 Chris George47916 978% 5 Keith Kindrick47546 970% 6 Don Edberg47526 970% 7 Bob McGowan 47491 969% 8 Mark Smith47414 968% 9 Rich Spicer47344 966% 10 Bill Nibley47270 965% percentages relative 4900-pt per fect score can see close top Others order finish Terry Kop Ian Craig Foxgord Todd Billman Jim Thomas Ed Hipp Jay Siren Don Vickers Ian Douglas Tony Kay John Brown Pete Carr Don Tatum Steve George letter CD Miles Moran sent contestants Thank joining us Moorpark last weekend first hope Masters Soaring fliers partici pated have shown care start new concept championship competition com petition Thermal Duration flier feel too easy Thermals day landing tricky winches OK no rush no confining rules other words thing required land think what Thermal Duration contest about Most good fliers will get time comes down landing made standard tape nothing tricky nothing have seen before Ideas Run rounds can started before 300 pm Saturday 100 pm Sunday precise landing Greater penalty being time under over Now question want continue next year time year OK Did like location would OK again Would rather held part country Did like free time Saturday morning warm up Golfers bowlers runners etc before compete peo ple made contest possible Give some ideas think should run Will participate next year Thanks sponsors Ace R/C Airtronics Control Systems Labs Futaba Gator R/C RCM Sig SR Batteries World Engines Special thanks Helen Olsen did scor ing weather flawless lift absolute best Easterner has ever flown Land ings usual deciding factor top guns made landings vertically raising aile rons dropping flaps pointing planes nose seemingly straight down 100-point tar get landings could heard over valley conservative styles approaching circle did gather same consistent re sults super-strong birds Rahm winches retrievers worked per fectly day very quiet Honda generator run ning right beside batteries kept snappy throughout NSS would like thank TOSS group putting initial Soaring Masters contest true class beginning end Joe Wurts following piece Dave Swain appeared Toss Up newsletter Thousand Oaks club Chuck Griswald ed Itor So Joe Wurts went out did again won NSS-TOSS Masters OK does Soaring guru Purple thermals Dont believe Heat waves visiblebut far away Smells Hardly might smell fresh landmine horsepucky never indi cated thermal before Joe doesnt change physics born lucky Thats good horsepucky must build superior SailAugust 1989 167 Bill Efflnger * says oniy Plax n Patternce Seas give yes aseorted deaigea yes watt have selected beet classic dealges ef linaC fee yes cheese hew pattente fee peat Impeetant exclusive feature Golden Age Scale Curtisa Hawk P-i gglengthg4tswiatgspae 2263 sq wing eras Per 1323 engines 3-4 channel RJC UIJ RCOS-14 6 % Scale Curtlas Falcon 33 length114 wing span 3130 sal wing wee 4 ch 3/C f RCOS-13 6 ifS Scale Cosana AW 31 wing span sq w ng urea 20 30 engines 3 4cfennel 3/C RC3S-1 6 113 Scale Piper Cub J-3 113 wing sftun00 length 2300 sq wing sees 20 30 cid enginen 54 chunnel 3/C RC3S-2 6 Quarter Seal- WWI SE5A 30w wing spec sq wing 578 te 22 engines ReOS 6 SPAD C-XIll 5 79/5 spec 5 21 20 sq le wang 513 ax 31 engines Capable flyer captures wag/native 3C05-$ 6 FOKKER DR-i TRIPLANE 72 wing apse 1773 sq w wingaeea 731x1hoengines RCOS-3 6 SOPWITH CAMEL F1 34 wing spec 0 sq iv wingereasli lbswlxRlCFly wned iv balsa cenetrectien ever 65 sq ft xl drawwgs RCOS-11 $2436 NeWPipe Tn-Pacer PA -22 1 Oaae-Thhd Scale2 1163/3 wing span sq wing eree 20 ax 30 cid engines Fee 4 h channel 3/Cs appren 12 lbs 5311/6 everall length Flywondlbalas Isle/age reaceceable wing panels steerable cxc wheel designed lee easy grand handling authentic scale Ilight peefxrrnaece 3C353$2435 Bitt Efflagar Foseding Meesber AMA NFFS Halt Fewer Prices fee cowylete plans sub aseanably end detailed pane/lets Add $230 fer Maitisa Tabs Seed fee brscbare ahead ef rewd new brechure chewing new Plan Sets fee 1933 Send 51 relsedehix xc veer let erderl WE TECHNICAL SERVICES Po Box 76884-S Atlanta GA 30328 plane So far thats credible answer Ive seen better-designed planes Ive seen planes straighter wings yoas Masters would have seen same ones did Theres whole lot guy whats surface Joe Sailplanes what Orel H baseball dont want sound like preacher dedicated RC Sailplane driver shows leader boards over place can sum up three words practice practice practice Ed Oldenburg said best watching Joe fun fly after Masters 90% thumb107c plane Practice Nobody has time busy little worlds Joe makes time overheard some body say Joe out evening flying week prior Masters definitely rules out couch potato theory Practice could something simple like Two-Meter short hi-start lunch hour needs calories After work field schoolyard shooting 20 30 Spot landings hi-start hand launch Lots daylight now daylight saving time Practice get-together weekends weekdays guys have Im promptu contests develop Soaring skills difference between sink lift well use tools So know tools well Joe may have also rans come contest day So guess its time get off couch count lucky stars Joe Wurts member TOSS club least way can look over shoulder see what thumb does bet its much different what thumb does still has edge called AC TICE Thanks great story Dave Its probably best explanation Ive seen secret suc cesst Selig-Donovan airfoil tests John Donovan sent letter about low-Reynolds-number air foil tests Michael Selig performed Princeton University testing finally finished Following two years setup 1200 hours wind tunnel time used test 60 airfoil sections yielding 130 polars support pro gram greatly appreciated Michael Dave FraserBB also mod elers will use data apologize delay getting video Like everything else experimental work generally takes longer expectedin case factor two Nonetheless test ing completed January time video made mid-January Michael left Penn State moved St Louis am working McDonnell Douglas Research Labs us currently working writ ing Soartech hope finish June feel confident will worth wait Approximately 20 copies video made Princeton quality reproduc tions reasonable good can achieved professionally since knew would getting anxious wanted get copy soon possible offset some debt incurred Mi chael during latter part project intend have copies video madethis time professionallyfor sale $20 copies will done production house quality will better type firm works volume basis Thus will ac cumulate orders video until September Assuming have least 30 orders will filled through production house other wise will refund money know anyone else might terested obtaining copy please have contact address John Donovan 754 Stone Canyon Dr Manchester MO 63021 Thanks John information video extremely interesting $20 very reason able Im sure Sailplaners will want see orders will amount several times 30 copies needed go ahead Seeing video makes appreciate tremendous amount very precise work Michael John Dave put project turned out much bigger originally intended may well go down quite significant event Soar ing history As John mentioned tested 60 models ran 130 polars polar done five differ ent Reynolds numbers Reynolds num ber took hour 45 minutes complete also designed quite few new im proved airfoils based computer program pre diction actual test results new SD airfoils will undoubtedly become next gen eration standards 28-minute video would make outstand ing club meeting project Experienced members could bone up advance help clarify what shown tape video starts showing tunnel measurements taken shows actual lift/drag polar being generated computer screen equations describing lift drag aae dis cussed also effect airfoil thickness camber excellent analysis im portance Duration Speed Distance quali Jet LIghtest Pliota PILOT BUST hase Modern J5 Helmet Face Mask Oxygen m Hoas REALISTIC Weighs Less Half Ossace 168 Model Aviation AFFORDABLE SPEED CONTROLS ale models speed contests ass batty proportlosal aIthee dIrecalos Also lacoaorated fall-eate tImer whIch ahats dome motor lathe avant eta leans amer recalver recafvev battery falters Foe AlaplaseCoespleteAssembled ModelsParts KRend Tested EKE-24C$2150$2830 EKS-24UN/A$4130 EKE-FR$4000$5000 Foe Cars EKE-7R$2500$2100 EKE-7RM$2600$2200 EKE-FR$4030$5030 EKE-PB$403005030 RBV-4$1533$1335 RBV-4 ON BOARD VOLTMETER assembled ashs carry tall 30-day merrasty Please send $230 tue postage handling pee order Send SAgE toe wore latonnatlon Mall orders ELDEN-KEN ELECTRONICS INC PO BOx 1332 Aenada CoIceado 33001 colt today 3024211324 elsa tdastwxasd axxptd rtx a% See Vose Osala a No 308-l/SScale s555 tnata Santa eseteaxas No 3C7 .1/7 Scale 36 Sad 75 SatanTex U mim ml i[ei RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs8 AMA Membership9 ARB167 Ace Radio Control6 810 Aerodrome Models Ltd134 Aerospace Composite Prod168 Air Flair6 Airtronics215 Altech Marketing153154 American Jr Aircraft Co165 American Sailplane Des156 Aviation Expo Inc94 B&P Associates39 Blue Ridge Mach & Tools158 Bolar Heli Research135 Bomber Field Inc51 Bru Line Industries47 Byron Originals22-23 CH Electronics39 Campbell Tools Co160 Campbells Custom Kits156 Channel 1 Productions138 Chicagoland Model Air Show165 Cleveland Model Supply18 Composite Aircraft Eng43 Control Systems Labs34 Coverite151 Cox Hobbies145 Crenshaw Aero164 Culpepper Models Inc49 DGA Designs168 D&R Aircraft Mfg45 Tom Dixon22 Doylejet158 Du-Bro Products Inc61 Duracraft20 E&G Enterprises34 Elden-Ken Electronics168 FHS Supply Inc5 Fiorenze Hobby Center160 Flights Fancy Aeromodel145 Flyline Models11 Fourmost Products49 Fox Mfg Co45 Fults Dual Struts144 Futaba Corp America21 172 G&A Products160 GM Precision Products144 G&P Sales159 Gator RC Products155 Carl Goldberg Models150-151 Golden Gate Hobbies164 Gorham Model Products11 Paul K Guillow Inc138 High Sky6 Hobby Barn132-133 Hobby Dynamics80 91 Hobby Horn10 Hobby Lobby International146-149 Hobby Woods51 Bob Holman Plans160 Hotel Harrington49 Ikon Northwest Co15 Indy RC Sales Inc140-142 JR Radios80 Larry Jolly Model Products41 Jomar20 JTec35 K&B Mfg165 K&S Engineerlg135 Kingsway Enterprises144 Klotz164 Kraft Midwest16 Kustom Kraftsmanship143 Lone Star Models7 MACS Products144 McDaniel RC Service39 Jim Messers134 Micro Mark43 Micro-X-Products16 Midwest Products79 Model Rectifier Corp . Coy 2&3 19 37 Model Research Labs165 Model Safety Ent166 Walt Moucha Models160 Mutchlers Hobbies136-137 Newman/Caps18 Nor-Ray Products Inc139 North Products158 Northeast Aerodynamics4 Northeast Screen Graphics45 OS Engines85 Pacer Tech166 Parrish Aircraft164 Pattern Tek156 John Peck Leisure Prod53 Peck-Polymers145 Penn Valley Hobby Center158 Performance Products Ultd22 Pica Products16 Planes & Things158 Polks Hobby86-87 Product Design4 Progress Mfg Co60 RAM10 RC Buyers Guide157 RC Designs18 RC Extras158 RC Soaring Digest143 RJL Industries6 Radio South35 Red Max Fuel5 Robart43 Robbe Model Sport7 Roun Tuit47 SAC40 SR Batteries131 Safety Plus22 139 Satellite City17 Scale Glider Components6 Scale Model Research160 Scale Plans & Photo Ser158 Sermos RC Snap Connectors20 Shamrock Competition Imports40 Sheldons Hobby Shop20 Sig Mfg Co1 4 159 Smith Enterprises11 Bob Smith Industries53 135 Stangel Enterprises167 Sunshine Hobbies171 Superior Aircraft41 Sure Flite160 Suretech139 T&D Fiberglass Spec20 Tatone Products Co10 Tidewater Hobby Enterprises8 Todays Hobbies Inc47 Top Flite Models Inc37 Tower Hobbies161-163 Tru-Turn36 WE Technical Services168 Webra91 Williams Brothers53 Windsor Propeller Co145 World EnginesCover 4 Zimpro Marketing36 ties F3B X-C Duration Multi-Task types Sailplanes Polar diagrams wellregarded airfoils type flying shown explained lesson air foil must selected intended task pays know what look squiggly lines Soartech #8 addition producing video John mentioned Michael have written up results RC Soaring technical journal Soa-tech edited published Herk Stokely Princeton Project originally con ceived fit 80 90 pages Herk now fig ures report will run close 200 pages says data will presented both graphical polars tables containing same data numerical form Also course will written insights two talented individuals extra pages very special issue #8 will increase Cost usual $5 $10 itll worth penny Dont worry youve already sent $5 Herk Hell ask additional mails #8 new orders US Canada send $10 $15 other countries HA Stokely 1504 N Horse shoe Circle Virginia Beach VA 23451 FAI news Terry Edmonds full report April ClAM meeting Paris should Competition Newsletter part issue quick recap highlights RoIf Girsberger Switzerland will replace John Grigg Chairman F3B Subcommit tee John forced resign because much overseas travel associated job new US F3B representative will either Terry Ed monds Don Edberg proposal lower winch motor resistance 12 milliohms IS defeated because majority felt plot increase winch power Lets see contestants like 15milliohm motors world champs France August Remember stock Ford longshaft winch motors have internal resistances 910 milliohms about power French proposal new Aero-Tow Soar ing class provisionally accepted will called F31 may recall event out lined June column calls fairly large scalelike Gliders being towed 200 meters performing Speed Duration tasks long shot sure British proposal Thermal Durton class provisionally accepted will called F3J proposal used standard BARCS percentage slot rules verbatim man-on-man task fixed time slot usually 10 minutes tricky part have fly land within start end slot flight time beginning release think air too good might delay launching see what others slot doing theres good air youd launch immediately get max flight time Thermal specialists have wishing FAI Duration World Championships some time F3J could well prove very popu lar However big snag far US concerned rules permit hand towing So either lobby winch launching learn tow August 1989 189 No 626 Sweepee$1300 AC Sport/Pattern canard spans 64 uses 40 power No 627 Apiary$225 CL Sport/Stunter spans 261/2 uses Cox Queen Bee 074 power No 193StIletto CL Stunt model McDonald winner 1976 1980 1902 PAl World Champs$ 375 No 239Blue Birds AC Ken Willardo formation plane 4-chaooel 10115 powerS 375 No 262Crashmeeter CL Crash-proof trainer two oizeo15/30 35/40 power$ 125 No 3101930 Fleet Biplane AC Sport Scale 35/40 4-channel Wingspan 56 0. 11s scale Two sheets$ 625 No 314Drake ii AC Ken Willardo flying Soot 3-channel 15-power Fly lood remonable gear$ 375 No 328Taylor Cub AC Don Srulls Schoolyard-Scale tt49s 2-3 chonnel Spans 50 In$ 350 No 332Zephyr AC Small 2-channel glider tor hand-launch tow thermal slope soaring$ 200 No 386Laser 200 AC Sport Scala replica championship Aerohatic tiler Uses 40 power 4-5 channel Two shoets$ 1075 No 4471I2A Miss America AC Old-Timer Texaco modal 049 glow 2-channels$ 650 No 457Spectra AC Electric-powewr 05-size motor asen 3 different wings sport soaring aerohasicsS 700 No 4904-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channala$ 650 No 465Biue Max ii AC Fan-fly sportotar 40-size engines spans 52 Lightweight structureS 700 No 512Extra 230 AC Giant Scale acrohatic plane opans 0 ft ases Quadra engine Two plan sheets$ 1650 No 621Comet Jr Cilpper Pius 35% AC Old-Timer spsrtster /oA engine 2-ch AC spans 48 in$ 650 No 528Swaliow AC Lightweight hotdoggtr 40-size four-stroke engines spans 50 inS 025 No 531TenIbis Coupe PP Aahher-powemd Coape dHivar spans 48 contest-winner$ 475 0No 533Cessna C-37 AC Schoolyard Scale famosa 30s plane 949/10 power 2-ch spans 42 in$ 500 O3 No 5341938 Chalienger AC Texaco Old-Timer spans 47/o tsr 049 engine 2-channel AC$ 550 cNo 535Atrlx AC AMA Class 0 Sailplane spans 110 ases 4-channel AC system8 725 CSNo 539Simltar Siow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$ 350 No 541Parakeet AC Sport hiplane 15125 engines 3-channel AC equipment spans 42 S 675 V No 654Super Doubier Ii AC Sport AerobaticgPylon 40/46 four-stroke engine spans 57 in$ 575 No 569Eiectrostresk AC Electric aerobatic plane spans 44 anon 05 motor8 550 -j oNo 570Busy Bee FF Pee Wea-30 plane 02 power spans 30 has either sheet-haisa huin-ap sarfaces8 400 No 572TR-260 AC Sport Scale Aerobatic plane 4-stroke 60165 power spans 66 in$ 1100 o gNo 575 ScorpIon 60 AC Fan-fly aerohatic plant 60 power spans 50 InS 1150 No 578 Serendipltyf ndoor EZB record-holder spans un inS 325 No 578 Schwelzer 126B AC Quarter-scale Sailplane spans 125 Two plan sheets 5 1475 No 681 Gee Bee Modef Y AC Golden Age Ascer spans 72 /s scale 60 power Thme plan sheets8 1175 noNo 563 Sportwagon AC Aadio-ized sport FF model spans 54 uses 1 0/15 engine$ 700 E No 585 Dragonfly PP High-performance P-30 Auhher thip spans 30 weighs 50 gramsS 400 No 666 Snapdragon AC Fan-fly/sportatar 25/30 engines spans 45 in5 600 CD 0No 588 Mariah AC Slope-Snaring Sailplane spans 41 uses 2 AC channelsS 425 CD No 593Tayiorcraft AC Sport Scale lightpiane baildo standard 2-placer clipped-wing air show stanter Spans either 70 aor 58 30140 two-stroke 40/48 tsar-stroke engine Two plan sheets no documentation$1000 o No 595Sperrow AC Spsrtster 25 engines spans 43 inS650 Z ENo 596Tomahawk il CL Profile Stunter ases 35 engine spans 46 in5500 50No 598Coronet 150 AC-Assist Old-Timer enlarged 150% spans 72 in. sons 40-size 4-strnke/30-size 2-stanke$050 O5No 601Nickel AC Sportoter engine 3 AC chsnnela Spans 44 in$500 802Lil Bit CL Stunter spans 27 has flaps$250 0No 603Sparrow Nawk P30 PP Competition rubber-power plant won 67 hats Spans 30 in$225 No 604Aeronca AC Electric sportoter 00 motor spans 68 in, uses 3 AC ChannelsS900 No 60521 Sport Speed CL Competition Speed plane spans 21 uses 21 engine metal panS325 -s aNo oeAstrostar PP competition plane spans 48 has 317 sq wing area$500 Curliss Seagull AC Giant Scale hiplane spans 90 uses Osadra/Zenosh power Three plan sheets no doc$2400 08Top Fun CL trainer spans 24 in$325 05 No 609Taperwing AC Pylon Ascer spans 29 Plan plan parts template shaet$600 00 No 610Protobype AC Sport biplane spans 46 sees 45/2-cycle 00/4-cycle power$650 E No 611Cablnair PP Scaleilke raSher-power biplane sport flier spans 23 in$400 50No 612 NVCL Dragonfly CL Corahat plane all-woad spans 24 Por reed-naive engine$ 200 0 No 613 Short Sterling AC Sport Scale WW II homher uses four 15-size engines spans 74 No dacamentation$ 2050 No 614Electrocutor AC Electric sportoter 00 direct-drive motor spans 44 inS 575 aNo 615Argosy CL Sport Scale Twenties-era trimotor hiplane transport spans 46 ones 40 twin engines5 1100 - 0No 616Raunchy PP Perrymans Nostalgia Gas competition plane spans 40 in$ 400 2No 617Push-Pull 240 AC Twin-engine spartoter spans 66 uses 40 engines$ 1475 r aNo 8Skyraider CL Sport Scale profile plane spans 30 15/25 power$ 475 cNo 619Keith Rider R4 FF Scale Golden Age racer raSher power spans 10 inS 300 fl aNo 620GImlet 40 AC Sport/Pattem plane spans 60 40/50 engine 2 sheetsS 1100 No 621Thunderbird 60 CL Big Stonter spans 61 60-size engine 2 sheets$ 1150 No 622Quick P-30 PP Competition raSher-power P-30-claas plane spans 30 inS 325 aNo 623Nendereon Longeter AC Quarter-scale 1033 fliwer spans 90 in, 4-stroke 40/48 engine 3 plan tht no doc. 50 No 624Keleher Lark AC Quarter-scale homehuilt spans 69 60/90 4-stroke power 2 plan sheets no dec$ 1100 2No 625Antoinette CL Scale eraly Prench monoplane spans 45 uses 25/35 power$ 575 Firoie numbers plans YOU wish order best handling please include pay00mont some other service plans order -- a193239262310314326332386 aC 447457460465512521528531 05 a534535539541554569570 575576578581583585586I ooE zzo588593595596598601602603 oa604605606607608609610611 612613614615616617618619I OV2 0621622623624625626627I Planpriceincludes first class postage forUS delivery Air Mail over 300 miles rsat non-USaddress lease add $250 AIr Mall osta e handlln eachIan check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print caretullyEnclosed $ ______________________ _______________________ NAME _______________________________ AMA No ___________ I STREET 63 CITY Os _________________ ZIP_____________ Magical computer design programs Last months column Jeff Raskins comments about some perceived problems design pro gram using passed Jeffs letter along Lee Murray 1300 Bay Ridge Road Appleton WI 54915 telephone1-414/73 1-4848 coau thor program Lees response Jeff points out program should considered magical think Jeff felt implying programs en gineering tools suspect com menting ease speed program As point out programs provide what has reduced equations used program Jeff dealt John Hohensee wrote user-friendly MaxSoar program Mac comput ers John wrote code respective programs MaxSoar PC-Soar based equations Sailplane Designer software package has market since 1983 flight performance technology MaxSoar PC-Soar long list experts cited references program helps include Michael Selig Ron Van Putte Chuck Anderson Alex Strojnik Eric Lis ter Helmut Wehren Martin Simons Lynn Cromer Blame Beron-Rawdon realize programs today final answer Sailplane design software will see John receptive sugges tions responding user comments Show us some credible equations weand otherswill incorporate reasonable dihe dral polyhedral sweep angles etc affect LID ra tios rate sink stability programs recommend proper dihedral equivalent angle optimum spiral oscillatory stability given specific information about models customers getting improved versions programs libraries cost post age handling some cases mailed cost Someone out money would never make such offer Dodgson Designs new newsletter Bob Dodg son has another first among Sailplane kit manufacturershis own newsletter Its called Second Wind comes out twice year costs buck copy Its well worth reading especially fliers already Dodgson planes considering taking plunge address Dodgson Designs 21230 Damson Road Bothell WA 98021 telephone 1-212/776-8067 Dodguon Gliders excellent machines no other line Sailpianes has same almost cultllke following first issne runs 10 pages includes Titillating Tips sent Dodg son Glider fliers Bob gives 25%-off certificates description Bobs new Orbiter kit 59-in-span Hand Launcher designed Eric Jackson Portland sells $65 Bob got started kit making back 1972 much other interesting material wanted reprint some stuff SW #1 see Im way over allotted space will save next month 170 Model Aviation FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident

Soaring ConoiByron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 TOLEDO SHOW 35th Annual Radio Con trol Exposition yes started 1955 held April 7-9 1989 crowds usual huge size exhibitors said business better ever great RC hobby its facets just keeps growing growing However few really new things Gliders Bob Sealy s booth center assem Toledo scenes L Bob Scaly stands next new Pulsar 100-in design 129-in.span Ultima left Both Thermal Soarers info column Sigs Mike Pratt R prototype Ninja Slope Soarer Model black yellow/orange/red trimvery striking Dave Mroz L demonstrated Sucker Pump evacuates vacuum bags Dave partner Noal Rossow formed Composite Aircraft Engi neering & Supply provide provide tools materials vacuum bagging Gentleman far right R American Sailplane Designs owner Gary Anderson Hes holding fuselage toy-sized ASW-20 Fellow left Rainar Weibaick High Sky Thermal Navigator electronic variometer Device invades rudder-servo circuit polyhedral-type Soarers turns plane right left indicate its ascent descent TV name John Hoovers Burton MI design L Name comes V-tail atop short fin Aerospace Composites carbon fiber tow R captured between layers nonwoven glass cloth good reinforcement foam wings Epoxy can easily soak through carbon strands 48 Model Aviation Radio bly Sailplane fanatics see talk overBobs new design Pulsar June column photos description See ing live lets appreciate what fine looking nicely proportioned ship Pulsar much like 100-in version Bobs Ultima same Schuemann-style wing planform However balsa-sheeted foam core two-piece wings plug fuse lage stab low fin one-piece fiberglass fuselage beautifully made quite light has same type slip-on nose cone Ultima Id better explain last one-piece fuse bit Ultima fuselages come two forward rear pieces slip joint just behind wing builder epoxies halves together fills joint line prior painting Pulsar can built either polyhedral wing rudder/elevator control straightwing-with-aileron versions suspect build ers will opt straight wings installa tion ailerons flaps means bit con struction get plane versatile fun fly should good new Sportsman F3B S3B Class Bob coming out stretched wing 124 version called Laser course build ers can cut down cores make size wing fancy 112- 118-in spans would also make nice sized Gliders Pulsar kit $129 Laser $149 Both postpaid direct Bob Also works quarter-scale Reiherstay tuned Bobs address 521 96th Lane NE Blame MN 55434 telephonel 612/780-2737 Bob Pam expect moving Tennessee late summerwell pass along new address later Sig Manufacturing Co s booth Mike Pratt showing new all-wood Slope Soaring design should out soon Its called Ninja Si lent Assassin Mike also designed Riser 100 says 60-in-span Ninja good allaround Slope flier should excellent ginners throwing planes off hilltops No price delivery info yet Dynaflite s booth also host Mark Smiths new 100-in Apogee Mark himself able attend show Apogee light 25 3 lb all-wood design using welltested Eppler 205 airfoil trendy Schuemann style wing good news lists $5995 Continued page 165 Fourmost Fuselage Fixture Mark II Fourmost Fuselage Fixture Mark II designed auto matically align fuselage structures built strings measuring eyeballing Price $5995 Simply slide four centering brackets track until align fire wall tail joint two bulkheads Clamp fuselage together lightly rubber bands structure will straight ready gluing Fixture will accomodate fuselages long four feet wide eight inches eight inches Please Include $400 Shipping l{andling direct ordera FOURMOST PRODUCTS 4040 24TH AVEFOREST GROVE OR 97116 I HE III Polyhedral $4495 Aileron $5195 Paul Wilson holds class distance record 66 miles 59 wing span zIsq h up Eppler 214/Seling 4061/Airfoil choice BE WINNER ORDER TODAY 5031 357-2732 -HIGH QUALITY SAILPLANE KITSTerry Edmonds mulli-task sailplanes 10 2 meter 39 oz & up CALLISTO-standard class 44 oz & up CULPEPPER IZ MODELS INC 2526 Washington DubuqueIA 52001 3191583-4830 WASHINGTONS AMA BASE. $ j per couple per rnght Check day Minimum stay 2 nthts Free Parking Cars Free Full Breakfasts Free Metropass Sat Sun Free DC Area Map Free Harrington Hawk Cafeteria & Cafe /C*717/#fl, 11th & E Streets NW Washington DC 20004 c~ 0-424-8532 628 81400mJk3/l August 1989 49 SR Batteries new mini-sized RC Tool Kit especlaily good Allen-type hex-head screws case holds screwdriver handle ratchet extension dozen inch-size 6 metric-size Allen drivers well Phiilips head slotted-head screwdriver bits Designed Rusty Shaw LeRoy Satterlee *AMA MEMBER RATE Tax included COMPOSITE MATERIALS BORON 004 dia KEYLAR CLOTH 10 oz 17 oz 36 oz KEYLAR THREAD -22 lb test x 010 dia CARBON FIBER TOW 6000 12000 strand CARBON FIBER PAPER 05 oz per yard CARBON FIBER UNIDIRECTIONAL CLOTH ide CARBON FIBER TAPE -5 wide CARBON FIBER SHEET STOCK 016 thick CARBON FIBER SPAR MATERIAL irectional thick CARBON FIBER FIBER ROD irectional dia MICROFILM mskys best gold film 00012 thick INDOOR MYLAR 59 thick MYLAR HEAT SRINK COVERINGS 0015 thick adhesive METALIZED MYLAR 0005 thick gas bags ALUMINUM WING SKINS thick FAI free flight models FOAM CUTTING WIRE dia Stainless Steel-200 Ft Rolls REAL SANDING SEALER ds best lider polish 3Ms #465 WING SKINNING TAPE acrylic adhesive tape form ENGINES AND THE BRAND NEW LINE OF es COMPETITION ENGINES leading supplier composites worlds modelers FOR COMPLETE CATALOG SEND $200 TO eae ee Model Research Labs 25108 Marguerite #160 Mission Viejo Ca 92692 Short Sunderland huge four-engined fly ing boat served RAF Coastal Com mand 1938 1955 hunting subma rines downed fliers Supermarine Seagull 1930s single-engined biplane fly ing boat used air-sea rescue Westland Lysander sturdy ground support type often used drop Allied agents supplies underground Fiat CR42 Falco pretty Italian biplane fighter shot down captured 1940 collection also boasts Heinkel 111 standard German medium bomber just two surviving examples Junkers Ju-87 Stuka first widely used dive bomber became easy target RAFs fighters Junkers Ju-88 best German medium bombers rare early example shot down restored Messerschmitt Bf-109E standard Ger man fighter Messerschmitt Bf-l 10 twin-engined German fighter no match Spitfires Hurricanes Battle Britain Museum building located left parking lot also houses Roundel restaurant museum-goer will find snacks complete meals Dedicated Scale modelers needing accu rate data project may want contem plate pilgrimage RAF Museum contacting Richard Simpson Keeper Aircraft Exhibits should part advance planning Simpsons permission youll able cross spectator barrier close-up look prototype youre interested Any interested support ing work museum can join its So ciety Friends 500 pounds about $9 per year Membership details available Secretary Society Friends RAF Museum Hendon NW9 5LL Eng land RAFs huge collection air craft reserve collections RAF bases throughout England Some can visited get special permission ad vance its British military air craft turn place see Hendon RC Soaring/Blakeslee Continued page 49 Mark flew plane recent Soaring Mas ters about tied lead tried patented touch-and-go landings stop clock make spot landing Im told plane touched didnt go Mark missed landing dropping him eighth place Al winning Masters testimonial Apogee its prudent point out Mark could fly manhole cover still win con testshes good Lets hope some Marks skill will come packaged kit American Sailplane Designs SD booth housed San Diegos Gary Anderson said business has steadily growing im provements arc being madeincluding tele phone great news customers wishing check kits stock Garys inventory cludes smallest largest American-made kits can buy both Thermal Slope swears little toy ASW-20 fuselage hes holding photo will fly Gary also makes third-scale ASW 20 kit wingspan 197 164 ft Gary can reached 2626 Coronado Ave #89 San Diego CA 92154 telephone 1-619/429-828 1 Also manning ASD booth Rainar Wei balck designer manufacturer amazing Thermal Navigator ingenious gizmo tells plane going up down automat ically turning plane way its rising other way its descending actually microsized variometer electronic amplifier plugs between receiver rudder servo assuming youre flying rudder/elevator polyhedral-wing ship transmitters rudder stick will override TN can steer plane spite way Navigator wants go Get info Rainer High Sky 3929 Kansas St #9 San Diego CA 92104 telephone 1-619/297-5792 Robbe s new Gliders 10-in-span Ha bicht Hawk far-out-looking Vampire flying wing Habicht has Plura plastic fuse lage Jedelsky-type solid balsa wing Vampire looks fast just sitting its said actually medium-speed flier quite easy handle German imports highly prefabricated kits prices reflect time work save putting together Habicht kit $150 Vampire $200 Both prices re I&O UIbINtO AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOtH K&B Micro-Balloons FILLER K&B SUPER FOXY RtSIN K&B SUPtR FOXY THINNER K&B SUPtR FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS 989 UnlbedV LCv AUGUST 20 eStatic Display Fun Fly Swap Shop Air Show Team Competition r Information Call Fo SHOW August 1989 165 WORLD WIDE SINCE I9O 9 AJ INTERCEPTOR IRTF *760 *596 COMPANY PO Box 68132 Portland OR 97268 WOULD YOU FLY IN PLANE THAT HAD NO GAS GAUGE OF COURSE NOT thats hIL what youre doing havent measured the performance receiver batteries BATSTAT 1000 youll REALLY know long can confidently fly full charge BATSTAT performs safe automatic discharge test allows calculate reciever packs capacity Order BATSTAT 1000 sending $1455 plus $200 Postage & Handling Model Safety Enterprises Department M 13127 Kellam Ct 1F32 San Diego CA 92130 Specify Futaba Imodel Airtronics universal test connector DONT GUESS! TRUST THE PREVENT CRASH II ORDER ILiE C BATTERY STATUS TESTER TODAY Allow 3-4 weeks delivery year warranty must completely satisfied return within 30 days courteous refund Dealer Inquiries welcome fleet price reductions approximately 15% Toledo Specials can get men tioning saw See Robbe ads info address direct order Hobby Shack has taken big jump Glider business becoming US distributor complete line Sailplanes International kits Britain moment include five Slope ships three Thermal kits range price $75 100-in all-wood Osprey $340 glass-and-foam 1 18-in ASW-20 Scale ship Check HS ads complete infor mation SR Batteries Larry Sribnick some new bat teries neat minisize tool kit new 700 Series cell same size ordinary AA 500 mAh cell has capacity 725 mAh cell primarily designed transmitters space battery pack limited flier wants flying time can get going external 900 Series pack 700 Series pack can made shape almost connector pack can used make model transmitter cost eight-cell pack $4695 plus addi tional $4 connector required SRs RC Tool Kit high-quality set 18 hex drivers six metric two Phillipshead three slotted-head screwdrivers ratchet handle screwdriver handle extension adapter A-in-drive sockets kit $2695 plus $3 shipping Other interesting stuff show new breed computer radios increasing range composite materials vacuum bag ging supplies Ace R/C showing prototypes new computer radio should available sum mer Airtronics its new Vision radios low Composite Aircraft Engineering s Dave Mroz doing vacuum bagging demos handoperated Sucker pump people lined up 14 deep watch CAE Sucker-Kit sells $5995 includes items required get started new bagging CAEs VHS Show Tell video highly recom mended Its $3995 will save price times over avoided mistakes See CAE ad magazine full information Aerospace Composite Products George Sparr also doing big business ACP first offer aerospace industry composite materi als modelers has large very com prehensive line includes carbon fiber tow mat rods laminates weights Key lar fiberglass cloth tape epoxy res ins SASE George Box 16621 Irvine CA 92714 will get 10-page list exotic products Airtronics showing its exciting new Vision 85P radio just starting delivered time Delivery delayed awaiting availability new very detailed instruction manual Visions ATRCS pronounced Tracks computer-encoding capability heart system completely eliminating pots reversing switches ATRCS provides features requires fairly extensive owners manual explain ATRCS hardit isnt extremely comprehen sive cant think anything full gamut model Sailplanes rudder/elevator F3B eight-channel Scale should capable ing ATRCS cant programmed handle talking Bob Renaud said Airtronics recognized problem trying explain ATRCS features magazine ads cant done So unprecedented service prospec tive purchasers card call Airtronics will get complete instruction manualthe same included set Only reading through whole manual will get full pic ture what Visions ATRCS computerencoding system will overlooked Vision set new Model 985 FM dual-conversion PCM Super Narrow Band receiver 1991 state-of-theart receiver Also included four 831 heavyduty ball bearing miniservos good size Gliders Ive flown Camano long range Vision RCI6 frequency scanner picking up fairly strong commercial data transmis sion just 10 kHz below RCl6s 7211 MHz ap pears anyway commercial broadcast ing between channels will have pretty close and/or strong cause problems 985 receiver review little history Control Systems Labs originally designed ATRCS computer en coding Sailplane program offered $300 conversion Airtronics Module 75P transmitter ATRCS conversions success ful popular Airtronics purchased rights opinion great move Airtronics part Vision 85P first radio set designed specifically ATRCS CSL continues work Airtronics has written new program 166 Model Aviation wR/C IHANGAR [J CATALOG IKits OR Plans Innovative expensive Quick & Easy Build HORNET 074 Order yours today QIJ1cK&LIVY SPORTSEND $2 Specificatioma Wing lpao 26 Wang Are~ 275 Sq Incatalog free orderl Leogth 25 Loading 13 Oz/lq Ft Weight 11/2 Lbs aileron traimer qualifies pilot sleek lookI Radio 4-Chaooel micro servos Oxpee-lence lane Simple durable rectangular 2-spar sheeted wings sheeted box type fuselage solid tail surfaces pre-cut AAA balsa ply fullsize illustrated plansSTANGEL ENTERPRISES romplete instroctions hardware package wheels 0cc BOX 330 Ml WAUKESHA WISCONSIN 53187 0336 ICIT/plama$4995*5350 5611 Flat Only $995 5l5O s6flU MEMBEREAA n AOPA AM Pattern planes 8P version think will have Helicopter version out later things considered have hunch Vision 8SP will become peoples choice sophisti cated Sailplane radio First annual Soaring Masters contest sig nificance contest first what hoped will long line Thermal Du ration contests truly top fliers sport Masters sponsored National Soar ing Society NSS Pete Carr president Thousand Oaks SS Miles Moran president CD unique thing about Soaring Masters concept like Masters Golf Tourna ment requires qualifications entry Contes tants must LSF Level IV V have won significant contest like Nats 23 entrants 1989 mostly Cal ifornia nevertheless read like Whos l4io Soaring Personally think great Up now its possible top guns get together fair shootout see really best best stop think about com petitive RC Soaring hasnt around very longless 20 years Some guys Masters like Mark Smith Larry Jolly Terry Koplan go back almost beginning Having chance see guys compete some thing tell grandchildren about occasion best Joe Wurts rel ative youngster surprising outcome cause Joe has winning just about everything California over past couple years Ill have Joe below top 10 Joe Wurts48228 984% 2 Fred Weaver 48111 982% 3 Larry Jolly48057 981% 4 Chris George47916 978% 5 Keith Kindrick47546 970% 6 Don Edberg47526 970% 7 Bob McGowan 47491 969% 8 Mark Smith47414 968% 9 Rich Spicer47344 966% 10 Bill Nibley47270 965% percentages relative 4900-pt per fect score can see close top Others order finish Terry Kop Ian Craig Foxgord Todd Billman Jim Thomas Ed Hipp Jay Siren Don Vickers Ian Douglas Tony Kay John Brown Pete Carr Don Tatum Steve George letter CD Miles Moran sent contestants Thank joining us Moorpark last weekend first hope Masters Soaring fliers partici pated have shown care start new concept championship competition com petition Thermal Duration flier feel too easy Thermals day landing tricky winches OK no rush no confining rules other words thing required land think what Thermal Duration contest about Most good fliers will get time comes down landing made standard tape nothing tricky nothing have seen before Ideas Run rounds can started before 300 pm Saturday 100 pm Sunday precise landing Greater penalty being time under over Now question want continue next year time year OK Did like location would OK again Would rather held part country Did like free time Saturday morning warm up Golfers bowlers runners etc before compete peo ple made contest possible Give some ideas think should run Will participate next year Thanks sponsors Ace R/C Airtronics Control Systems Labs Futaba Gator R/C RCM Sig SR Batteries World Engines Special thanks Helen Olsen did scor ing weather flawless lift absolute best Easterner has ever flown Land ings usual deciding factor top guns made landings vertically raising aile rons dropping flaps pointing planes nose seemingly straight down 100-point tar get landings could heard over valley conservative styles approaching circle did gather same consistent re sults super-strong birds Rahm winches retrievers worked per fectly day very quiet Honda generator run ning right beside batteries kept snappy throughout NSS would like thank TOSS group putting initial Soaring Masters contest true class beginning end Joe Wurts following piece Dave Swain appeared Toss Up newsletter Thousand Oaks club Chuck Griswald ed Itor So Joe Wurts went out did again won NSS-TOSS Masters OK does Soaring guru Purple thermals Dont believe Heat waves visiblebut far away Smells Hardly might smell fresh landmine horsepucky never indi cated thermal before Joe doesnt change physics born lucky Thats good horsepucky must build superior SailAugust 1989 167 Bill Efflnger * says oniy Plax n Patternce Seas give yes aseorted deaigea yes watt have selected beet classic dealges ef linaC fee yes cheese hew pattente fee peat Impeetant exclusive feature Golden Age Scale Curtisa Hawk P-i gglengthg4tswiatgspae 2263 sq wing eras Per 1323 engines 3-4 channel RJC UIJ RCOS-14 6 % Scale Curtlas Falcon 33 length114 wing span 3130 sal wing wee 4 ch 3/C f RCOS-13 6 ifS Scale Cosana AW 31 wing span sq w ng urea 20 30 engines 3 4cfennel 3/C RC3S-1 6 113 Scale Piper Cub J-3 113 wing sftun00 length 2300 sq wing sees 20 30 cid enginen 54 chunnel 3/C RC3S-2 6 Quarter Seal- WWI SE5A 30w wing spec sq wing 578 te 22 engines ReOS 6 SPAD C-XIll 5 79/5 spec 5 21 20 sq le wang 513 ax 31 engines Capable flyer captures wag/native 3C05-$ 6 FOKKER DR-i TRIPLANE 72 wing apse 1773 sq w wingaeea 731x1hoengines RCOS-3 6 SOPWITH CAMEL F1 34 wing spec 0 sq iv wingereasli lbswlxRlCFly wned iv balsa cenetrectien ever 65 sq ft xl drawwgs RCOS-11 $2436 NeWPipe Tn-Pacer PA -22 1 Oaae-Thhd Scale2 1163/3 wing span sq wing eree 20 ax 30 cid engines Fee 4 h channel 3/Cs appren 12 lbs 5311/6 everall length Flywondlbalas Isle/age reaceceable wing panels steerable cxc wheel designed lee easy grand handling authentic scale Ilight peefxrrnaece 3C353$2435 Bitt Efflagar Foseding Meesber AMA NFFS Halt Fewer Prices fee cowylete plans sub aseanably end detailed pane/lets Add $230 fer Maitisa Tabs Seed fee brscbare ahead ef rewd new brechure chewing new Plan Sets fee 1933 Send 51 relsedehix xc veer let erderl WE TECHNICAL SERVICES Po Box 76884-S Atlanta GA 30328 plane So far thats credible answer Ive seen better-designed planes Ive seen planes straighter wings yoas Masters would have seen same ones did Theres whole lot guy whats surface Joe Sailplanes what Orel H baseball dont want sound like preacher dedicated RC Sailplane driver shows leader boards over place can sum up three words practice practice practice Ed Oldenburg said best watching Joe fun fly after Masters 90% thumb107c plane Practice Nobody has time busy little worlds Joe makes time overheard some body say Joe out evening flying week prior Masters definitely rules out couch potato theory Practice could something simple like Two-Meter short hi-start lunch hour needs calories After work field schoolyard shooting 20 30 Spot landings hi-start hand launch Lots daylight now daylight saving time Practice get-together weekends weekdays guys have Im promptu contests develop Soaring skills difference between sink lift well use tools So know tools well Joe may have also rans come contest day So guess its time get off couch count lucky stars Joe Wurts member TOSS club least way can look over shoulder see what thumb does bet its much different what thumb does still has edge called AC TICE Thanks great story Dave Its probably best explanation Ive seen secret suc cesst Selig-Donovan airfoil tests John Donovan sent letter about low-Reynolds-number air foil tests Michael Selig performed Princeton University testing finally finished Following two years setup 1200 hours wind tunnel time used test 60 airfoil sections yielding 130 polars support pro gram greatly appreciated Michael Dave FraserBB also mod elers will use data apologize delay getting video Like everything else experimental work generally takes longer expectedin case factor two Nonetheless test ing completed January time video made mid-January Michael left Penn State moved St Louis am working McDonnell Douglas Research Labs us currently working writ ing Soartech hope finish June feel confident will worth wait Approximately 20 copies video made Princeton quality reproduc tions reasonable good can achieved professionally since knew would getting anxious wanted get copy soon possible offset some debt incurred Mi chael during latter part project intend have copies video madethis time professionallyfor sale $20 copies will done production house quality will better type firm works volume basis Thus will ac cumulate orders video until September Assuming have least 30 orders will filled through production house other wise will refund money know anyone else might terested obtaining copy please have contact address John Donovan 754 Stone Canyon Dr Manchester MO 63021 Thanks John information video extremely interesting $20 very reason able Im sure Sailplaners will want see orders will amount several times 30 copies needed go ahead Seeing video makes appreciate tremendous amount very precise work Michael John Dave put project turned out much bigger originally intended may well go down quite significant event Soar ing history As John mentioned tested 60 models ran 130 polars polar done five differ ent Reynolds numbers Reynolds num ber took hour 45 minutes complete also designed quite few new im proved airfoils based computer program pre diction actual test results new SD airfoils will undoubtedly become next gen eration standards 28-minute video would make outstand ing club meeting project Experienced members could bone up advance help clarify what shown tape video starts showing tunnel measurements taken shows actual lift/drag polar being generated computer screen equations describing lift drag aae dis cussed also effect airfoil thickness camber excellent analysis im portance Duration Speed Distance quali Jet LIghtest Pliota PILOT BUST hase Modern J5 Helmet Face Mask Oxygen m Hoas REALISTIC Weighs Less Half Ossace 168 Model Aviation AFFORDABLE SPEED CONTROLS ale models speed contests ass batty proportlosal aIthee dIrecalos Also lacoaorated fall-eate tImer whIch ahats dome motor lathe avant eta leans amer recalver recafvev battery falters Foe AlaplaseCoespleteAssembled ModelsParts KRend Tested EKE-24C$2150$2830 EKS-24UN/A$4130 EKE-FR$4000$5000 Foe Cars EKE-7R$2500$2100 EKE-7RM$2600$2200 EKE-FR$4030$5030 EKE-PB$403005030 RBV-4$1533$1335 RBV-4 ON BOARD VOLTMETER assembled ashs carry tall 30-day merrasty Please send $230 tue postage handling pee order Send SAgE toe wore latonnatlon Mall orders ELDEN-KEN ELECTRONICS INC PO BOx 1332 Aenada CoIceado 33001 colt today 3024211324 elsa tdastwxasd axxptd rtx a% See Vose Osala a No 308-l/SScale s555 tnata Santa eseteaxas No 3C7 .1/7 Scale 36 Sad 75 SatanTex U mim ml i[ei RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs8 AMA Membership9 ARB167 Ace Radio Control6 810 Aerodrome Models Ltd134 Aerospace Composite Prod168 Air Flair6 Airtronics215 Altech Marketing153154 American Jr Aircraft Co165 American Sailplane Des156 Aviation Expo Inc94 B&P Associates39 Blue Ridge Mach & Tools158 Bolar Heli Research135 Bomber Field Inc51 Bru Line Industries47 Byron Originals22-23 CH Electronics39 Campbell Tools Co160 Campbells Custom Kits156 Channel 1 Productions138 Chicagoland Model Air Show165 Cleveland Model Supply18 Composite Aircraft Eng43 Control Systems Labs34 Coverite151 Cox Hobbies145 Crenshaw Aero164 Culpepper Models Inc49 DGA Designs168 D&R Aircraft Mfg45 Tom Dixon22 Doylejet158 Du-Bro Products Inc61 Duracraft20 E&G Enterprises34 Elden-Ken Electronics168 FHS Supply Inc5 Fiorenze Hobby Center160 Flights Fancy Aeromodel145 Flyline Models11 Fourmost Products49 Fox Mfg Co45 Fults Dual Struts144 Futaba Corp America21 172 G&A Products160 GM Precision Products144 G&P Sales159 Gator RC Products155 Carl Goldberg Models150-151 Golden Gate Hobbies164 Gorham Model Products11 Paul K Guillow Inc138 High Sky6 Hobby Barn132-133 Hobby Dynamics80 91 Hobby Horn10 Hobby Lobby International146-149 Hobby Woods51 Bob Holman Plans160 Hotel Harrington49 Ikon Northwest Co15 Indy RC Sales Inc140-142 JR Radios80 Larry Jolly Model Products41 Jomar20 JTec35 K&B Mfg165 K&S Engineerlg135 Kingsway Enterprises144 Klotz164 Kraft Midwest16 Kustom Kraftsmanship143 Lone Star Models7 MACS Products144 McDaniel RC Service39 Jim Messers134 Micro Mark43 Micro-X-Products16 Midwest Products79 Model Rectifier Corp . Coy 2&3 19 37 Model Research Labs165 Model Safety Ent166 Walt Moucha Models160 Mutchlers Hobbies136-137 Newman/Caps18 Nor-Ray Products Inc139 North Products158 Northeast Aerodynamics4 Northeast Screen Graphics45 OS Engines85 Pacer Tech166 Parrish Aircraft164 Pattern Tek156 John Peck Leisure Prod53 Peck-Polymers145 Penn Valley Hobby Center158 Performance Products Ultd22 Pica Products16 Planes & Things158 Polks Hobby86-87 Product Design4 Progress Mfg Co60 RAM10 RC Buyers Guide157 RC Designs18 RC Extras158 RC Soaring Digest143 RJL Industries6 Radio South35 Red Max Fuel5 Robart43 Robbe Model Sport7 Roun Tuit47 SAC40 SR Batteries131 Safety Plus22 139 Satellite City17 Scale Glider Components6 Scale Model Research160 Scale Plans & Photo Ser158 Sermos RC Snap Connectors20 Shamrock Competition Imports40 Sheldons Hobby Shop20 Sig Mfg Co1 4 159 Smith Enterprises11 Bob Smith Industries53 135 Stangel Enterprises167 Sunshine Hobbies171 Superior Aircraft41 Sure Flite160 Suretech139 T&D Fiberglass Spec20 Tatone Products Co10 Tidewater Hobby Enterprises8 Todays Hobbies Inc47 Top Flite Models Inc37 Tower Hobbies161-163 Tru-Turn36 WE Technical Services168 Webra91 Williams Brothers53 Windsor Propeller Co145 World EnginesCover 4 Zimpro Marketing36 ties F3B X-C Duration Multi-Task types Sailplanes Polar diagrams wellregarded airfoils type flying shown explained lesson air foil must selected intended task pays know what look squiggly lines Soartech #8 addition producing video John mentioned Michael have written up results RC Soaring technical journal Soa-tech edited published Herk Stokely Princeton Project originally con ceived fit 80 90 pages Herk now fig ures report will run close 200 pages says data will presented both graphical polars tables containing same data numerical form Also course will written insights two talented individuals extra pages very special issue #8 will increase Cost usual $5 $10 itll worth penny Dont worry youve already sent $5 Herk Hell ask additional mails #8 new orders US Canada send $10 $15 other countries HA Stokely 1504 N Horse shoe Circle Virginia Beach VA 23451 FAI news Terry Edmonds full report April ClAM meeting Paris should Competition Newsletter part issue quick recap highlights RoIf Girsberger Switzerland will replace John Grigg Chairman F3B Subcommit tee John forced resign because much overseas travel associated job new US F3B representative will either Terry Ed monds Don Edberg proposal lower winch motor resistance 12 milliohms IS defeated because majority felt plot increase winch power Lets see contestants like 15milliohm motors world champs France August Remember stock Ford longshaft winch motors have internal resistances 910 milliohms about power French proposal new Aero-Tow Soar ing class provisionally accepted will called F31 may recall event out lined June column calls fairly large scalelike Gliders being towed 200 meters performing Speed Duration tasks long shot sure British proposal Thermal Durton class provisionally accepted will called F3J proposal used standard BARCS percentage slot rules verbatim man-on-man task fixed time slot usually 10 minutes tricky part have fly land within start end slot flight time beginning release think air too good might delay launching see what others slot doing theres good air youd launch immediately get max flight time Thermal specialists have wishing FAI Duration World Championships some time F3J could well prove very popu lar However big snag far US concerned rules permit hand towing So either lobby winch launching learn tow August 1989 189 No 626 Sweepee$1300 AC Sport/Pattern canard spans 64 uses 40 power No 627 Apiary$225 CL Sport/Stunter spans 261/2 uses Cox Queen Bee 074 power No 193StIletto CL Stunt model McDonald winner 1976 1980 1902 PAl World Champs$ 375 No 239Blue Birds AC Ken Willardo formation plane 4-chaooel 10115 powerS 375 No 262Crashmeeter CL Crash-proof trainer two oizeo15/30 35/40 power$ 125 No 3101930 Fleet Biplane AC Sport Scale 35/40 4-channel Wingspan 56 0. 11s scale Two sheets$ 625 No 314Drake ii AC Ken Willardo flying Soot 3-channel 15-power Fly lood remonable gear$ 375 No 328Taylor Cub AC Don Srulls Schoolyard-Scale tt49s 2-3 chonnel Spans 50 In$ 350 No 332Zephyr AC Small 2-channel glider tor hand-launch tow thermal slope soaring$ 200 No 386Laser 200 AC Sport Scala replica championship Aerohatic tiler Uses 40 power 4-5 channel Two shoets$ 1075 No 4471I2A Miss America AC Old-Timer Texaco modal 049 glow 2-channels$ 650 No 457Spectra AC Electric-powewr 05-size motor asen 3 different wings sport soaring aerohasicsS 700 No 4904-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channala$ 650 No 465Biue Max ii AC Fan-fly sportotar 40-size engines spans 52 Lightweight structureS 700 No 512Extra 230 AC Giant Scale acrohatic plane opans 0 ft ases Quadra engine Two plan sheets$ 1650 No 621Comet Jr Cilpper Pius 35% AC Old-Timer spsrtster /oA engine 2-ch AC spans 48 in$ 650 No 528Swaliow AC Lightweight hotdoggtr 40-size four-stroke engines spans 50 inS 025 No 531TenIbis Coupe PP Aahher-powemd Coape dHivar spans 48 contest-winner$ 475 0No 533Cessna C-37 AC Schoolyard Scale famosa 30s plane 949/10 power 2-ch spans 42 in$ 500 O3 No 5341938 Chalienger AC Texaco Old-Timer spans 47/o tsr 049 engine 2-channel AC$ 550 cNo 535Atrlx AC AMA Class 0 Sailplane spans 110 ases 4-channel AC system8 725 CSNo 539Simltar Siow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$ 350 No 541Parakeet AC Sport hiplane 15125 engines 3-channel AC equipment spans 42 S 675 V No 654Super Doubier Ii AC Sport AerobaticgPylon 40/46 four-stroke engine spans 57 in$ 575 No 569Eiectrostresk AC Electric aerobatic plane spans 44 anon 05 motor8 550 -j oNo 570Busy Bee FF Pee Wea-30 plane 02 power spans 30 has either sheet-haisa huin-ap sarfaces8 400 No 572TR-260 AC Sport Scale Aerobatic plane 4-stroke 60165 power spans 66 in$ 1100 o gNo 575 ScorpIon 60 AC Fan-fly aerohatic plant 60 power spans 50 InS 1150 No 578 Serendipltyf ndoor EZB record-holder spans un inS 325 No 578 Schwelzer 126B AC Quarter-scale Sailplane spans 125 Two plan sheets 5 1475 No 681 Gee Bee Modef Y AC Golden Age Ascer spans 72 /s scale 60 power Thme plan sheets8 1175 noNo 563 Sportwagon AC Aadio-ized sport FF model spans 54 uses 1 0/15 engine$ 700 E No 585 Dragonfly PP High-performance P-30 Auhher thip spans 30 weighs 50 gramsS 400 No 666 Snapdragon AC Fan-fly/sportatar 25/30 engines spans 45 in5 600 CD 0No 588 Mariah AC Slope-Snaring Sailplane spans 41 uses 2 AC channelsS 425 CD No 593Tayiorcraft AC Sport Scale lightpiane baildo standard 2-placer clipped-wing air show stanter Spans either 70 aor 58 30140 two-stroke 40/48 tsar-stroke engine Two plan sheets no documentation$1000 o No 595Sperrow AC Spsrtster 25 engines spans 43 inS650 Z ENo 596Tomahawk il CL Profile Stunter ases 35 engine spans 46 in5500 50No 598Coronet 150 AC-Assist Old-Timer enlarged 150% spans 72 in. sons 40-size 4-strnke/30-size 2-stanke$050 O5No 601Nickel AC Sportoter engine 3 AC chsnnela Spans 44 in$500 802Lil Bit CL Stunter spans 27 has flaps$250 0No 603Sparrow Nawk P30 PP Competition rubber-power plant won 67 hats Spans 30 in$225 No 604Aeronca AC Electric sportoter 00 motor spans 68 in, uses 3 AC ChannelsS900 No 60521 Sport Speed CL Competition Speed plane spans 21 uses 21 engine metal panS325 -s aNo oeAstrostar PP competition plane spans 48 has 317 sq wing area$500 Curliss Seagull AC Giant Scale hiplane spans 90 uses Osadra/Zenosh power Three plan sheets no doc$2400 08Top Fun CL trainer spans 24 in$325 05 No 609Taperwing AC Pylon Ascer spans 29 Plan plan parts template shaet$600 00 No 610Protobype AC Sport biplane spans 46 sees 45/2-cycle 00/4-cycle power$650 E No 611Cablnair PP Scaleilke raSher-power biplane sport flier spans 23 in$400 50No 612 NVCL Dragonfly CL Corahat plane all-woad spans 24 Por reed-naive engine$ 200 0 No 613 Short Sterling AC Sport Scale WW II homher uses four 15-size engines spans 74 No dacamentation$ 2050 No 614Electrocutor AC Electric sportoter 00 direct-drive motor spans 44 inS 575 aNo 615Argosy CL Sport Scale Twenties-era trimotor hiplane transport spans 46 ones 40 twin engines5 1100 - 0No 616Raunchy PP Perrymans Nostalgia Gas competition plane spans 40 in$ 400 2No 617Push-Pull 240 AC Twin-engine spartoter spans 66 uses 40 engines$ 1475 r aNo 8Skyraider CL Sport Scale profile plane spans 30 15/25 power$ 475 cNo 619Keith Rider R4 FF Scale Golden Age racer raSher power spans 10 inS 300 fl aNo 620GImlet 40 AC Sport/Pattem plane spans 60 40/50 engine 2 sheetsS 1100 No 621Thunderbird 60 CL Big Stonter spans 61 60-size engine 2 sheets$ 1150 No 622Quick P-30 PP Competition raSher-power P-30-claas plane spans 30 inS 325 aNo 623Nendereon Longeter AC Quarter-scale 1033 fliwer spans 90 in, 4-stroke 40/48 engine 3 plan tht no doc. 50 No 624Keleher Lark AC Quarter-scale homehuilt spans 69 60/90 4-stroke power 2 plan sheets no dec$ 1100 2No 625Antoinette CL Scale eraly Prench monoplane spans 45 uses 25/35 power$ 575 Firoie numbers plans YOU wish order best handling please include pay00mont some other service plans order -- a193239262310314326332386 aC 447457460465512521528531 05 a534535539541554569570 575576578581583585586I ooE zzo588593595596598601602603 oa604605606607608609610611 612613614615616617618619I OV2 0621622623624625626627I Planpriceincludes first class postage forUS delivery Air Mail over 300 miles rsat non-USaddress lease add $250 AIr Mall osta e handlln eachIan check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print caretullyEnclosed $ ______________________ _______________________ NAME _______________________________ AMA No ___________ I STREET 63 CITY Os _________________ ZIP_____________ Magical computer design programs Last months column Jeff Raskins comments about some perceived problems design pro gram using passed Jeffs letter along Lee Murray 1300 Bay Ridge Road Appleton WI 54915 telephone1-414/73 1-4848 coau thor program Lees response Jeff points out program should considered magical think Jeff felt implying programs en gineering tools suspect com menting ease speed program As point out programs provide what has reduced equations used program Jeff dealt John Hohensee wrote user-friendly MaxSoar program Mac comput ers John wrote code respective programs MaxSoar PC-Soar based equations Sailplane Designer software package has market since 1983 flight performance technology MaxSoar PC-Soar long list experts cited references program helps include Michael Selig Ron Van Putte Chuck Anderson Alex Strojnik Eric Lis ter Helmut Wehren Martin Simons Lynn Cromer Blame Beron-Rawdon realize programs today final answer Sailplane design software will see John receptive sugges tions responding user comments Show us some credible equations weand otherswill incorporate reasonable dihe dral polyhedral sweep angles etc affect LID ra tios rate sink stability programs recommend proper dihedral equivalent angle optimum spiral oscillatory stability given specific information about models customers getting improved versions programs libraries cost post age handling some cases mailed cost Someone out money would never make such offer Dodgson Designs new newsletter Bob Dodg son has another first among Sailplane kit manufacturershis own newsletter Its called Second Wind comes out twice year costs buck copy Its well worth reading especially fliers already Dodgson planes considering taking plunge address Dodgson Designs 21230 Damson Road Bothell WA 98021 telephone 1-212/776-8067 Dodguon Gliders excellent machines no other line Sailpianes has same almost cultllke following first issne runs 10 pages includes Titillating Tips sent Dodg son Glider fliers Bob gives 25%-off certificates description Bobs new Orbiter kit 59-in-span Hand Launcher designed Eric Jackson Portland sells $65 Bob got started kit making back 1972 much other interesting material wanted reprint some stuff SW #1 see Im way over allotted space will save next month 170 Model Aviation FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident

Soaring ConoiByron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 TOLEDO SHOW 35th Annual Radio Con trol Exposition yes started 1955 held April 7-9 1989 crowds usual huge size exhibitors said business better ever great RC hobby its facets just keeps growing growing However few really new things Gliders Bob Sealy s booth center assem Toledo scenes L Bob Scaly stands next new Pulsar 100-in design 129-in.span Ultima left Both Thermal Soarers info column Sigs Mike Pratt R prototype Ninja Slope Soarer Model black yellow/orange/red trimvery striking Dave Mroz L demonstrated Sucker Pump evacuates vacuum bags Dave partner Noal Rossow formed Composite Aircraft Engi neering & Supply provide provide tools materials vacuum bagging Gentleman far right R American Sailplane Designs owner Gary Anderson Hes holding fuselage toy-sized ASW-20 Fellow left Rainar Weibaick High Sky Thermal Navigator electronic variometer Device invades rudder-servo circuit polyhedral-type Soarers turns plane right left indicate its ascent descent TV name John Hoovers Burton MI design L Name comes V-tail atop short fin Aerospace Composites carbon fiber tow R captured between layers nonwoven glass cloth good reinforcement foam wings Epoxy can easily soak through carbon strands 48 Model Aviation Radio bly Sailplane fanatics see talk overBobs new design Pulsar June column photos description See ing live lets appreciate what fine looking nicely proportioned ship Pulsar much like 100-in version Bobs Ultima same Schuemann-style wing planform However balsa-sheeted foam core two-piece wings plug fuse lage stab low fin one-piece fiberglass fuselage beautifully made quite light has same type slip-on nose cone Ultima Id better explain last one-piece fuse bit Ultima fuselages come two forward rear pieces slip joint just behind wing builder epoxies halves together fills joint line prior painting Pulsar can built either polyhedral wing rudder/elevator control straightwing-with-aileron versions suspect build ers will opt straight wings installa tion ailerons flaps means bit con struction get plane versatile fun fly should good new Sportsman F3B S3B Class Bob coming out stretched wing 124 version called Laser course build ers can cut down cores make size wing fancy 112- 118-in spans would also make nice sized Gliders Pulsar kit $129 Laser $149 Both postpaid direct Bob Also works quarter-scale Reiherstay tuned Bobs address 521 96th Lane NE Blame MN 55434 telephonel 612/780-2737 Bob Pam expect moving Tennessee late summerwell pass along new address later Sig Manufacturing Co s booth Mike Pratt showing new all-wood Slope Soaring design should out soon Its called Ninja Si lent Assassin Mike also designed Riser 100 says 60-in-span Ninja good allaround Slope flier should excellent ginners throwing planes off hilltops No price delivery info yet Dynaflite s booth also host Mark Smiths new 100-in Apogee Mark himself able attend show Apogee light 25 3 lb all-wood design using welltested Eppler 205 airfoil trendy Schuemann style wing good news lists $5995 Continued page 165 Fourmost Fuselage Fixture Mark II Fourmost Fuselage Fixture Mark II designed auto matically align fuselage structures built strings measuring eyeballing Price $5995 Simply slide four centering brackets track until align fire wall tail joint two bulkheads Clamp fuselage together lightly rubber bands structure will straight ready gluing Fixture will accomodate fuselages long four feet wide eight inches eight inches Please Include $400 Shipping l{andling direct ordera FOURMOST PRODUCTS 4040 24TH AVEFOREST GROVE OR 97116 I HE III Polyhedral $4495 Aileron $5195 Paul Wilson holds class distance record 66 miles 59 wing span zIsq h up Eppler 214/Seling 4061/Airfoil choice BE WINNER ORDER TODAY 5031 357-2732 -HIGH QUALITY SAILPLANE KITSTerry Edmonds mulli-task sailplanes 10 2 meter 39 oz & up CALLISTO-standard class 44 oz & up CULPEPPER IZ MODELS INC 2526 Washington DubuqueIA 52001 3191583-4830 WASHINGTONS AMA BASE. $ j per couple per rnght Check day Minimum stay 2 nthts Free Parking Cars Free Full Breakfasts Free Metropass Sat Sun Free DC Area Map Free Harrington Hawk Cafeteria & Cafe /C*717/#fl, 11th & E Streets NW Washington DC 20004 c~ 0-424-8532 628 81400mJk3/l August 1989 49 SR Batteries new mini-sized RC Tool Kit especlaily good Allen-type hex-head screws case holds screwdriver handle ratchet extension dozen inch-size 6 metric-size Allen drivers well Phiilips head slotted-head screwdriver bits Designed Rusty Shaw LeRoy Satterlee *AMA MEMBER RATE Tax included COMPOSITE MATERIALS BORON 004 dia KEYLAR CLOTH 10 oz 17 oz 36 oz KEYLAR THREAD -22 lb test x 010 dia CARBON FIBER TOW 6000 12000 strand CARBON FIBER PAPER 05 oz per yard CARBON FIBER UNIDIRECTIONAL CLOTH ide CARBON FIBER TAPE -5 wide CARBON FIBER SHEET STOCK 016 thick CARBON FIBER SPAR MATERIAL irectional thick CARBON FIBER FIBER ROD irectional dia MICROFILM mskys best gold film 00012 thick INDOOR MYLAR 59 thick MYLAR HEAT SRINK COVERINGS 0015 thick adhesive METALIZED MYLAR 0005 thick gas bags ALUMINUM WING SKINS thick FAI free flight models FOAM CUTTING WIRE dia Stainless Steel-200 Ft Rolls REAL SANDING SEALER ds best lider polish 3Ms #465 WING SKINNING TAPE acrylic adhesive tape form ENGINES AND THE BRAND NEW LINE OF es COMPETITION ENGINES leading supplier composites worlds modelers FOR COMPLETE CATALOG SEND $200 TO eae ee Model Research Labs 25108 Marguerite #160 Mission Viejo Ca 92692 Short Sunderland huge four-engined fly ing boat served RAF Coastal Com mand 1938 1955 hunting subma rines downed fliers Supermarine Seagull 1930s single-engined biplane fly ing boat used air-sea rescue Westland Lysander sturdy ground support type often used drop Allied agents supplies underground Fiat CR42 Falco pretty Italian biplane fighter shot down captured 1940 collection also boasts Heinkel 111 standard German medium bomber just two surviving examples Junkers Ju-87 Stuka first widely used dive bomber became easy target RAFs fighters Junkers Ju-88 best German medium bombers rare early example shot down restored Messerschmitt Bf-109E standard Ger man fighter Messerschmitt Bf-l 10 twin-engined German fighter no match Spitfires Hurricanes Battle Britain Museum building located left parking lot also houses Roundel restaurant museum-goer will find snacks complete meals Dedicated Scale modelers needing accu rate data project may want contem plate pilgrimage RAF Museum contacting Richard Simpson Keeper Aircraft Exhibits should part advance planning Simpsons permission youll able cross spectator barrier close-up look prototype youre interested Any interested support ing work museum can join its So ciety Friends 500 pounds about $9 per year Membership details available Secretary Society Friends RAF Museum Hendon NW9 5LL Eng land RAFs huge collection air craft reserve collections RAF bases throughout England Some can visited get special permission ad vance its British military air craft turn place see Hendon RC Soaring/Blakeslee Continued page 49 Mark flew plane recent Soaring Mas ters about tied lead tried patented touch-and-go landings stop clock make spot landing Im told plane touched didnt go Mark missed landing dropping him eighth place Al winning Masters testimonial Apogee its prudent point out Mark could fly manhole cover still win con testshes good Lets hope some Marks skill will come packaged kit American Sailplane Designs SD booth housed San Diegos Gary Anderson said business has steadily growing im provements arc being madeincluding tele phone great news customers wishing check kits stock Garys inventory cludes smallest largest American-made kits can buy both Thermal Slope swears little toy ASW-20 fuselage hes holding photo will fly Gary also makes third-scale ASW 20 kit wingspan 197 164 ft Gary can reached 2626 Coronado Ave #89 San Diego CA 92154 telephone 1-619/429-828 1 Also manning ASD booth Rainar Wei balck designer manufacturer amazing Thermal Navigator ingenious gizmo tells plane going up down automat ically turning plane way its rising other way its descending actually microsized variometer electronic amplifier plugs between receiver rudder servo assuming youre flying rudder/elevator polyhedral-wing ship transmitters rudder stick will override TN can steer plane spite way Navigator wants go Get info Rainer High Sky 3929 Kansas St #9 San Diego CA 92104 telephone 1-619/297-5792 Robbe s new Gliders 10-in-span Ha bicht Hawk far-out-looking Vampire flying wing Habicht has Plura plastic fuse lage Jedelsky-type solid balsa wing Vampire looks fast just sitting its said actually medium-speed flier quite easy handle German imports highly prefabricated kits prices reflect time work save putting together Habicht kit $150 Vampire $200 Both prices re I&O UIbINtO AirplaneManne K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOtH K&B Micro-Balloons FILLER K&B SUPER FOXY RtSIN K&B SUPtR FOXY THINNER K&B SUPtR FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS 989 UnlbedV LCv AUGUST 20 eStatic Display Fun Fly Swap Shop Air Show Team Competition r Information Call Fo SHOW August 1989 165 WORLD WIDE SINCE I9O 9 AJ INTERCEPTOR IRTF *760 *596 COMPANY PO Box 68132 Portland OR 97268 WOULD YOU FLY IN PLANE THAT HAD NO GAS GAUGE OF COURSE NOT thats hIL what youre doing havent measured the performance receiver batteries BATSTAT 1000 youll REALLY know long can confidently fly full charge BATSTAT performs safe automatic discharge test allows calculate reciever packs capacity Order BATSTAT 1000 sending $1455 plus $200 Postage & Handling Model Safety Enterprises Department M 13127 Kellam Ct 1F32 San Diego CA 92130 Specify Futaba Imodel Airtronics universal test connector DONT GUESS! TRUST THE PREVENT CRASH II ORDER ILiE C BATTERY STATUS TESTER TODAY Allow 3-4 weeks delivery year warranty must completely satisfied return within 30 days courteous refund Dealer Inquiries welcome fleet price reductions approximately 15% Toledo Specials can get men tioning saw See Robbe ads info address direct order Hobby Shack has taken big jump Glider business becoming US distributor complete line Sailplanes International kits Britain moment include five Slope ships three Thermal kits range price $75 100-in all-wood Osprey $340 glass-and-foam 1 18-in ASW-20 Scale ship Check HS ads complete infor mation SR Batteries Larry Sribnick some new bat teries neat minisize tool kit new 700 Series cell same size ordinary AA 500 mAh cell has capacity 725 mAh cell primarily designed transmitters space battery pack limited flier wants flying time can get going external 900 Series pack 700 Series pack can made shape almost connector pack can used make model transmitter cost eight-cell pack $4695 plus addi tional $4 connector required SRs RC Tool Kit high-quality set 18 hex drivers six metric two Phillipshead three slotted-head screwdrivers ratchet handle screwdriver handle extension adapter A-in-drive sockets kit $2695 plus $3 shipping Other interesting stuff show new breed computer radios increasing range composite materials vacuum bag ging supplies Ace R/C showing prototypes new computer radio should available sum mer Airtronics its new Vision radios low Composite Aircraft Engineering s Dave Mroz doing vacuum bagging demos handoperated Sucker pump people lined up 14 deep watch CAE Sucker-Kit sells $5995 includes items required get started new bagging CAEs VHS Show Tell video highly recom mended Its $3995 will save price times over avoided mistakes See CAE ad magazine full information Aerospace Composite Products George Sparr also doing big business ACP first offer aerospace industry composite materi als modelers has large very com prehensive line includes carbon fiber tow mat rods laminates weights Key lar fiberglass cloth tape epoxy res ins SASE George Box 16621 Irvine CA 92714 will get 10-page list exotic products Airtronics showing its exciting new Vision 85P radio just starting delivered time Delivery delayed awaiting availability new very detailed instruction manual Visions ATRCS pronounced Tracks computer-encoding capability heart system completely eliminating pots reversing switches ATRCS provides features requires fairly extensive owners manual explain ATRCS hardit isnt extremely comprehen sive cant think anything full gamut model Sailplanes rudder/elevator F3B eight-channel Scale should capable ing ATRCS cant programmed handle talking Bob Renaud said Airtronics recognized problem trying explain ATRCS features magazine ads cant done So unprecedented service prospec tive purchasers card call Airtronics will get complete instruction manualthe same included set Only reading through whole manual will get full pic ture what Visions ATRCS computerencoding system will overlooked Vision set new Model 985 FM dual-conversion PCM Super Narrow Band receiver 1991 state-of-theart receiver Also included four 831 heavyduty ball bearing miniservos good size Gliders Ive flown Camano long range Vision RCI6 frequency scanner picking up fairly strong commercial data transmis sion just 10 kHz below RCl6s 7211 MHz ap pears anyway commercial broadcast ing between channels will have pretty close and/or strong cause problems 985 receiver review little history Control Systems Labs originally designed ATRCS computer en coding Sailplane program offered $300 conversion Airtronics Module 75P transmitter ATRCS conversions success ful popular Airtronics purchased rights opinion great move Airtronics part Vision 85P first radio set designed specifically ATRCS CSL continues work Airtronics has written new program 166 Model Aviation wR/C IHANGAR [J CATALOG IKits OR Plans Innovative expensive Quick & Easy Build HORNET 074 Order yours today QIJ1cK&LIVY SPORTSEND $2 Specificatioma Wing lpao 26 Wang Are~ 275 Sq Incatalog free orderl Leogth 25 Loading 13 Oz/lq Ft Weight 11/2 Lbs aileron traimer qualifies pilot sleek lookI Radio 4-Chaooel micro servos Oxpee-lence lane Simple durable rectangular 2-spar sheeted wings sheeted box type fuselage solid tail surfaces pre-cut AAA balsa ply fullsize illustrated plansSTANGEL ENTERPRISES romplete instroctions hardware package wheels 0cc BOX 330 Ml WAUKESHA WISCONSIN 53187 0336 ICIT/plama$4995*5350 5611 Flat Only $995 5l5O s6flU MEMBEREAA n AOPA AM Pattern planes 8P version think will have Helicopter version out later things considered have hunch Vision 8SP will become peoples choice sophisti cated Sailplane radio First annual Soaring Masters contest sig nificance contest first what hoped will long line Thermal Du ration contests truly top fliers sport Masters sponsored National Soar ing Society NSS Pete Carr president Thousand Oaks SS Miles Moran president CD unique thing about Soaring Masters concept like Masters Golf Tourna ment requires qualifications entry Contes tants must LSF Level IV V have won significant contest like Nats 23 entrants 1989 mostly Cal ifornia nevertheless read like Whos l4io Soaring Personally think great Up now its possible top guns get together fair shootout see really best best stop think about com petitive RC Soaring hasnt around very longless 20 years Some guys Masters like Mark Smith Larry Jolly Terry Koplan go back almost beginning Having chance see guys compete some thing tell grandchildren about occasion best Joe Wurts rel ative youngster surprising outcome cause Joe has winning just about everything California over past couple years Ill have Joe below top 10 Joe Wurts48228 984% 2 Fred Weaver 48111 982% 3 Larry Jolly48057 981% 4 Chris George47916 978% 5 Keith Kindrick47546 970% 6 Don Edberg47526 970% 7 Bob McGowan 47491 969% 8 Mark Smith47414 968% 9 Rich Spicer47344 966% 10 Bill Nibley47270 965% percentages relative 4900-pt per fect score can see close top Others order finish Terry Kop Ian Craig Foxgord Todd Billman Jim Thomas Ed Hipp Jay Siren Don Vickers Ian Douglas Tony Kay John Brown Pete Carr Don Tatum Steve George letter CD Miles Moran sent contestants Thank joining us Moorpark last weekend first hope Masters Soaring fliers partici pated have shown care start new concept championship competition com petition Thermal Duration flier feel too easy Thermals day landing tricky winches OK no rush no confining rules other words thing required land think what Thermal Duration contest about Most good fliers will get time comes down landing made standard tape nothing tricky nothing have seen before Ideas Run rounds can started before 300 pm Saturday 100 pm Sunday precise landing Greater penalty being time under over Now question want continue next year time year OK Did like location would OK again Would rather held part country Did like free time Saturday morning warm up Golfers bowlers runners etc before compete peo ple made contest possible Give some ideas think should run Will participate next year Thanks sponsors Ace R/C Airtronics Control Systems Labs Futaba Gator R/C RCM Sig SR Batteries World Engines Special thanks Helen Olsen did scor ing weather flawless lift absolute best Easterner has ever flown Land ings usual deciding factor top guns made landings vertically raising aile rons dropping flaps pointing planes nose seemingly straight down 100-point tar get landings could heard over valley conservative styles approaching circle did gather same consistent re sults super-strong birds Rahm winches retrievers worked per fectly day very quiet Honda generator run ning right beside batteries kept snappy throughout NSS would like thank TOSS group putting initial Soaring Masters contest true class beginning end Joe Wurts following piece Dave Swain appeared Toss Up newsletter Thousand Oaks club Chuck Griswald ed Itor So Joe Wurts went out did again won NSS-TOSS Masters OK does Soaring guru Purple thermals Dont believe Heat waves visiblebut far away Smells Hardly might smell fresh landmine horsepucky never indi cated thermal before Joe doesnt change physics born lucky Thats good horsepucky must build superior SailAugust 1989 167 Bill Efflnger * says oniy Plax n Patternce Seas give yes aseorted deaigea yes watt have selected beet classic dealges ef linaC fee yes cheese hew pattente fee peat Impeetant exclusive feature Golden Age Scale Curtisa Hawk P-i gglengthg4tswiatgspae 2263 sq wing eras Per 1323 engines 3-4 channel RJC UIJ RCOS-14 6 % Scale Curtlas Falcon 33 length114 wing span 3130 sal wing wee 4 ch 3/C f RCOS-13 6 ifS Scale Cosana AW 31 wing span sq w ng urea 20 30 engines 3 4cfennel 3/C RC3S-1 6 113 Scale Piper Cub J-3 113 wing sftun00 length 2300 sq wing sees 20 30 cid enginen 54 chunnel 3/C RC3S-2 6 Quarter Seal- WWI SE5A 30w wing spec sq wing 578 te 22 engines ReOS 6 SPAD C-XIll 5 79/5 spec 5 21 20 sq le wang 513 ax 31 engines Capable flyer captures wag/native 3C05-$ 6 FOKKER DR-i TRIPLANE 72 wing apse 1773 sq w wingaeea 731x1hoengines RCOS-3 6 SOPWITH CAMEL F1 34 wing spec 0 sq iv wingereasli lbswlxRlCFly wned iv balsa cenetrectien ever 65 sq ft xl drawwgs RCOS-11 $2436 NeWPipe Tn-Pacer PA -22 1 Oaae-Thhd Scale2 1163/3 wing span sq wing eree 20 ax 30 cid engines Fee 4 h channel 3/Cs appren 12 lbs 5311/6 everall length Flywondlbalas Isle/age reaceceable wing panels steerable cxc wheel designed lee easy grand handling authentic scale Ilight peefxrrnaece 3C353$2435 Bitt Efflagar Foseding Meesber AMA NFFS Halt Fewer Prices fee cowylete plans sub aseanably end detailed pane/lets Add $230 fer Maitisa Tabs Seed fee brscbare ahead ef rewd new brechure chewing new Plan Sets fee 1933 Send 51 relsedehix xc veer let erderl WE TECHNICAL SERVICES Po Box 76884-S Atlanta GA 30328 plane So far thats credible answer Ive seen better-designed planes Ive seen planes straighter wings yoas Masters would have seen same ones did Theres whole lot guy whats surface Joe Sailplanes what Orel H baseball dont want sound like preacher dedicated RC Sailplane driver shows leader boards over place can sum up three words practice practice practice Ed Oldenburg said best watching Joe fun fly after Masters 90% thumb107c plane Practice Nobody has time busy little worlds Joe makes time overheard some body say Joe out evening flying week prior Masters definitely rules out couch potato theory Practice could something simple like Two-Meter short hi-start lunch hour needs calories After work field schoolyard shooting 20 30 Spot landings hi-start hand launch Lots daylight now daylight saving time Practice get-together weekends weekdays guys have Im promptu contests develop Soaring skills difference between sink lift well use tools So know tools well Joe may have also rans come contest day So guess its time get off couch count lucky stars Joe Wurts member TOSS club least way can look over shoulder see what thumb does bet its much different what thumb does still has edge called AC TICE Thanks great story Dave Its probably best explanation Ive seen secret suc cesst Selig-Donovan airfoil tests John Donovan sent letter about low-Reynolds-number air foil tests Michael Selig performed Princeton University testing finally finished Following two years setup 1200 hours wind tunnel time used test 60 airfoil sections yielding 130 polars support pro gram greatly appreciated Michael Dave FraserBB also mod elers will use data apologize delay getting video Like everything else experimental work generally takes longer expectedin case factor two Nonetheless test ing completed January time video made mid-January Michael left Penn State moved St Louis am working McDonnell Douglas Research Labs us currently working writ ing Soartech hope finish June feel confident will worth wait Approximately 20 copies video made Princeton quality reproduc tions reasonable good can achieved professionally since knew would getting anxious wanted get copy soon possible offset some debt incurred Mi chael during latter part project intend have copies video madethis time professionallyfor sale $20 copies will done production house quality will better type firm works volume basis Thus will ac cumulate orders video until September Assuming have least 30 orders will filled through production house other wise will refund money know anyone else might terested obtaining copy please have contact address John Donovan 754 Stone Canyon Dr Manchester MO 63021 Thanks John information video extremely interesting $20 very reason able Im sure Sailplaners will want see orders will amount several times 30 copies needed go ahead Seeing video makes appreciate tremendous amount very precise work Michael John Dave put project turned out much bigger originally intended may well go down quite significant event Soar ing history As John mentioned tested 60 models ran 130 polars polar done five differ ent Reynolds numbers Reynolds num ber took hour 45 minutes complete also designed quite few new im proved airfoils based computer program pre diction actual test results new SD airfoils will undoubtedly become next gen eration standards 28-minute video would make outstand ing club meeting project Experienced members could bone up advance help clarify what shown tape video starts showing tunnel measurements taken shows actual lift/drag polar being generated computer screen equations describing lift drag aae dis cussed also effect airfoil thickness camber excellent analysis im portance Duration Speed Distance quali Jet LIghtest Pliota PILOT BUST hase Modern J5 Helmet Face Mask Oxygen m Hoas REALISTIC Weighs Less Half Ossace 168 Model Aviation AFFORDABLE SPEED CONTROLS ale models speed contests ass batty proportlosal aIthee dIrecalos Also lacoaorated fall-eate tImer whIch ahats dome motor lathe avant eta leans amer recalver recafvev battery falters Foe AlaplaseCoespleteAssembled ModelsParts KRend Tested EKE-24C$2150$2830 EKS-24UN/A$4130 EKE-FR$4000$5000 Foe Cars EKE-7R$2500$2100 EKE-7RM$2600$2200 EKE-FR$4030$5030 EKE-PB$403005030 RBV-4$1533$1335 RBV-4 ON BOARD VOLTMETER assembled ashs carry tall 30-day merrasty Please send $230 tue postage handling pee order Send SAgE toe wore latonnatlon Mall orders ELDEN-KEN ELECTRONICS INC PO BOx 1332 Aenada CoIceado 33001 colt today 3024211324 elsa tdastwxasd axxptd rtx a% See Vose Osala a No 308-l/SScale s555 tnata Santa eseteaxas No 3C7 .1/7 Scale 36 Sad 75 SatanTex U mim ml i[ei RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs8 AMA Membership9 ARB167 Ace Radio Control6 810 Aerodrome Models Ltd134 Aerospace Composite Prod168 Air Flair6 Airtronics215 Altech Marketing153154 American Jr Aircraft Co165 American Sailplane Des156 Aviation Expo Inc94 B&P Associates39 Blue Ridge Mach & Tools158 Bolar Heli Research135 Bomber Field Inc51 Bru Line Industries47 Byron Originals22-23 CH Electronics39 Campbell Tools Co160 Campbells Custom Kits156 Channel 1 Productions138 Chicagoland Model Air Show165 Cleveland Model Supply18 Composite Aircraft Eng43 Control Systems Labs34 Coverite151 Cox Hobbies145 Crenshaw Aero164 Culpepper Models Inc49 DGA Designs168 D&R Aircraft Mfg45 Tom Dixon22 Doylejet158 Du-Bro Products Inc61 Duracraft20 E&G Enterprises34 Elden-Ken Electronics168 FHS Supply Inc5 Fiorenze Hobby Center160 Flights Fancy Aeromodel145 Flyline Models11 Fourmost Products49 Fox Mfg Co45 Fults Dual Struts144 Futaba Corp America21 172 G&A Products160 GM Precision Products144 G&P Sales159 Gator RC Products155 Carl Goldberg Models150-151 Golden Gate Hobbies164 Gorham Model Products11 Paul K Guillow Inc138 High Sky6 Hobby Barn132-133 Hobby Dynamics80 91 Hobby Horn10 Hobby Lobby International146-149 Hobby Woods51 Bob Holman Plans160 Hotel Harrington49 Ikon Northwest Co15 Indy RC Sales Inc140-142 JR Radios80 Larry Jolly Model Products41 Jomar20 JTec35 K&B Mfg165 K&S Engineerlg135 Kingsway Enterprises144 Klotz164 Kraft Midwest16 Kustom Kraftsmanship143 Lone Star Models7 MACS Products144 McDaniel RC Service39 Jim Messers134 Micro Mark43 Micro-X-Products16 Midwest Products79 Model Rectifier Corp . Coy 2&3 19 37 Model Research Labs165 Model Safety Ent166 Walt Moucha Models160 Mutchlers Hobbies136-137 Newman/Caps18 Nor-Ray Products Inc139 North Products158 Northeast Aerodynamics4 Northeast Screen Graphics45 OS Engines85 Pacer Tech166 Parrish Aircraft164 Pattern Tek156 John Peck Leisure Prod53 Peck-Polymers145 Penn Valley Hobby Center158 Performance Products Ultd22 Pica Products16 Planes & Things158 Polks Hobby86-87 Product Design4 Progress Mfg Co60 RAM10 RC Buyers Guide157 RC Designs18 RC Extras158 RC Soaring Digest143 RJL Industries6 Radio South35 Red Max Fuel5 Robart43 Robbe Model Sport7 Roun Tuit47 SAC40 SR Batteries131 Safety Plus22 139 Satellite City17 Scale Glider Components6 Scale Model Research160 Scale Plans & Photo Ser158 Sermos RC Snap Connectors20 Shamrock Competition Imports40 Sheldons Hobby Shop20 Sig Mfg Co1 4 159 Smith Enterprises11 Bob Smith Industries53 135 Stangel Enterprises167 Sunshine Hobbies171 Superior Aircraft41 Sure Flite160 Suretech139 T&D Fiberglass Spec20 Tatone Products Co10 Tidewater Hobby Enterprises8 Todays Hobbies Inc47 Top Flite Models Inc37 Tower Hobbies161-163 Tru-Turn36 WE Technical Services168 Webra91 Williams Brothers53 Windsor Propeller Co145 World EnginesCover 4 Zimpro Marketing36 ties F3B X-C Duration Multi-Task types Sailplanes Polar diagrams wellregarded airfoils type flying shown explained lesson air foil must selected intended task pays know what look squiggly lines Soartech #8 addition producing video John mentioned Michael have written up results RC Soaring technical journal Soa-tech edited published Herk Stokely Princeton Project originally con ceived fit 80 90 pages Herk now fig ures report will run close 200 pages says data will presented both graphical polars tables containing same data numerical form Also course will written insights two talented individuals extra pages very special issue #8 will increase Cost usual $5 $10 itll worth penny Dont worry youve already sent $5 Herk Hell ask additional mails #8 new orders US Canada send $10 $15 other countries HA Stokely 1504 N Horse shoe Circle Virginia Beach VA 23451 FAI news Terry Edmonds full report April ClAM meeting Paris should Competition Newsletter part issue quick recap highlights RoIf Girsberger Switzerland will replace John Grigg Chairman F3B Subcommit tee John forced resign because much overseas travel associated job new US F3B representative will either Terry Ed monds Don Edberg proposal lower winch motor resistance 12 milliohms IS defeated because majority felt plot increase winch power Lets see contestants like 15milliohm motors world champs France August Remember stock Ford longshaft winch motors have internal resistances 910 milliohms about power French proposal new Aero-Tow Soar ing class provisionally accepted will called F31 may recall event out lined June column calls fairly large scalelike Gliders being towed 200 meters performing Speed Duration tasks long shot sure British proposal Thermal Durton class provisionally accepted will called F3J proposal used standard BARCS percentage slot rules verbatim man-on-man task fixed time slot usually 10 minutes tricky part have fly land within start end slot flight time beginning release think air too good might delay launching see what others slot doing theres good air youd launch immediately get max flight time Thermal specialists have wishing FAI Duration World Championships some time F3J could well prove very popu lar However big snag far US concerned rules permit hand towing So either lobby winch launching learn tow August 1989 189 No 626 Sweepee$1300 AC Sport/Pattern canard spans 64 uses 40 power No 627 Apiary$225 CL Sport/Stunter spans 261/2 uses Cox Queen Bee 074 power No 193StIletto CL Stunt model McDonald winner 1976 1980 1902 PAl World Champs$ 375 No 239Blue Birds AC Ken Willardo formation plane 4-chaooel 10115 powerS 375 No 262Crashmeeter CL Crash-proof trainer two oizeo15/30 35/40 power$ 125 No 3101930 Fleet Biplane AC Sport Scale 35/40 4-channel Wingspan 56 0. 11s scale Two sheets$ 625 No 314Drake ii AC Ken Willardo flying Soot 3-channel 15-power Fly lood remonable gear$ 375 No 328Taylor Cub AC Don Srulls Schoolyard-Scale tt49s 2-3 chonnel Spans 50 In$ 350 No 332Zephyr AC Small 2-channel glider tor hand-launch tow thermal slope soaring$ 200 No 386Laser 200 AC Sport Scala replica championship Aerohatic tiler Uses 40 power 4-5 channel Two shoets$ 1075 No 4471I2A Miss America AC Old-Timer Texaco modal 049 glow 2-channels$ 650 No 457Spectra AC Electric-powewr 05-size motor asen 3 different wings sport soaring aerohasicsS 700 No 4904-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channala$ 650 No 465Biue Max ii AC Fan-fly sportotar 40-size engines spans 52 Lightweight structureS 700 No 512Extra 230 AC Giant Scale acrohatic plane opans 0 ft ases Quadra engine Two plan sheets$ 1650 No 621Comet Jr Cilpper Pius 35% AC Old-Timer spsrtster /oA engine 2-ch AC spans 48 in$ 650 No 528Swaliow AC Lightweight hotdoggtr 40-size four-stroke engines spans 50 inS 025 No 531TenIbis Coupe PP Aahher-powemd Coape dHivar spans 48 contest-winner$ 475 0No 533Cessna C-37 AC Schoolyard Scale famosa 30s plane 949/10 power 2-ch spans 42 in$ 500 O3 No 5341938 Chalienger AC Texaco Old-Timer spans 47/o tsr 049 engine 2-channel AC$ 550 cNo 535Atrlx AC AMA Class 0 Sailplane spans 110 ases 4-channel AC system8 725 CSNo 539Simltar Siow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$ 350 No 541Parakeet AC Sport hiplane 15125 engines 3-channel AC equipment spans 42 S 675 V No 654Super Doubier Ii AC Sport AerobaticgPylon 40/46 four-stroke engine spans 57 in$ 575 No 569Eiectrostresk AC Electric aerobatic plane spans 44 anon 05 motor8 550 -j oNo 570Busy Bee FF Pee Wea-30 plane 02 power spans 30 has either sheet-haisa huin-ap sarfaces8 400 No 572TR-260 AC Sport Scale Aerobatic plane 4-stroke 60165 power spans 66 in$ 1100 o gNo 575 ScorpIon 60 AC Fan-fly aerohatic plant 60 power spans 50 InS 1150 No 578 Serendipltyf ndoor EZB record-holder spans un inS 325 No 578 Schwelzer 126B AC Quarter-scale Sailplane spans 125 Two plan sheets 5 1475 No 681 Gee Bee Modef Y AC Golden Age Ascer spans 72 /s scale 60 power Thme plan sheets8 1175 noNo 563 Sportwagon AC Aadio-ized sport FF model spans 54 uses 1 0/15 engine$ 700 E No 585 Dragonfly PP High-performance P-30 Auhher thip spans 30 weighs 50 gramsS 400 No 666 Snapdragon AC Fan-fly/sportatar 25/30 engines spans 45 in5 600 CD 0No 588 Mariah AC Slope-Snaring Sailplane spans 41 uses 2 AC channelsS 425 CD No 593Tayiorcraft AC Sport Scale lightpiane baildo standard 2-placer clipped-wing air show stanter Spans either 70 aor 58 30140 two-stroke 40/48 tsar-stroke engine Two plan sheets no documentation$1000 o No 595Sperrow AC Spsrtster 25 engines spans 43 inS650 Z ENo 596Tomahawk il CL Profile Stunter ases 35 engine spans 46 in5500 50No 598Coronet 150 AC-Assist Old-Timer enlarged 150% spans 72 in. sons 40-size 4-strnke/30-size 2-stanke$050 O5No 601Nickel AC Sportoter engine 3 AC chsnnela Spans 44 in$500 802Lil Bit CL Stunter spans 27 has flaps$250 0No 603Sparrow Nawk P30 PP Competition rubber-power plant won 67 hats Spans 30 in$225 No 604Aeronca AC Electric sportoter 00 motor spans 68 in, uses 3 AC ChannelsS900 No 60521 Sport Speed CL Competition Speed plane spans 21 uses 21 engine metal panS325 -s aNo oeAstrostar PP competition plane spans 48 has 317 sq wing area$500 Curliss Seagull AC Giant Scale hiplane spans 90 uses Osadra/Zenosh power Three plan sheets no doc$2400 08Top Fun CL trainer spans 24 in$325 05 No 609Taperwing AC Pylon Ascer spans 29 Plan plan parts template shaet$600 00 No 610Protobype AC Sport biplane spans 46 sees 45/2-cycle 00/4-cycle power$650 E No 611Cablnair PP Scaleilke raSher-power biplane sport flier spans 23 in$400 50No 612 NVCL Dragonfly CL Corahat plane all-woad spans 24 Por reed-naive engine$ 200 0 No 613 Short Sterling AC Sport Scale WW II homher uses four 15-size engines spans 74 No dacamentation$ 2050 No 614Electrocutor AC Electric sportoter 00 direct-drive motor spans 44 inS 575 aNo 615Argosy CL Sport Scale Twenties-era trimotor hiplane transport spans 46 ones 40 twin engines5 1100 - 0No 616Raunchy PP Perrymans Nostalgia Gas competition plane spans 40 in$ 400 2No 617Push-Pull 240 AC Twin-engine spartoter spans 66 uses 40 engines$ 1475 r aNo 8Skyraider CL Sport Scale profile plane spans 30 15/25 power$ 475 cNo 619Keith Rider R4 FF Scale Golden Age racer raSher power spans 10 inS 300 fl aNo 620GImlet 40 AC Sport/Pattem plane spans 60 40/50 engine 2 sheetsS 1100 No 621Thunderbird 60 CL Big Stonter spans 61 60-size engine 2 sheets$ 1150 No 622Quick P-30 PP Competition raSher-power P-30-claas plane spans 30 inS 325 aNo 623Nendereon Longeter AC Quarter-scale 1033 fliwer spans 90 in, 4-stroke 40/48 engine 3 plan tht no doc. 50 No 624Keleher Lark AC Quarter-scale homehuilt spans 69 60/90 4-stroke power 2 plan sheets no dec$ 1100 2No 625Antoinette CL Scale eraly Prench monoplane spans 45 uses 25/35 power$ 575 Firoie numbers plans YOU wish order best handling please include pay00mont some other service plans order -- a193239262310314326332386 aC 447457460465512521528531 05 a534535539541554569570 575576578581583585586I ooE zzo588593595596598601602603 oa604605606607608609610611 612613614615616617618619I OV2 0621622623624625626627I Planpriceincludes first class postage forUS delivery Air Mail over 300 miles rsat non-USaddress lease add $250 AIr Mall osta e handlln eachIan check money order payable US funds drawn US bank Model Aviation AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print caretullyEnclosed $ ______________________ _______________________ NAME _______________________________ AMA No ___________ I STREET 63 CITY Os _________________ ZIP_____________ Magical computer design programs Last months column Jeff Raskins comments about some perceived problems design pro gram using passed Jeffs letter along Lee Murray 1300 Bay Ridge Road Appleton WI 54915 telephone1-414/73 1-4848 coau thor program Lees response Jeff points out program should considered magical think Jeff felt implying programs en gineering tools suspect com menting ease speed program As point out programs provide what has reduced equations used program Jeff dealt John Hohensee wrote user-friendly MaxSoar program Mac comput ers John wrote code respective programs MaxSoar PC-Soar based equations Sailplane Designer software package has market since 1983 flight performance technology MaxSoar PC-Soar long list experts cited references program helps include Michael Selig Ron Van Putte Chuck Anderson Alex Strojnik Eric Lis ter Helmut Wehren Martin Simons Lynn Cromer Blame Beron-Rawdon realize programs today final answer Sailplane design software will see John receptive sugges tions responding user comments Show us some credible equations weand otherswill incorporate reasonable dihe dral polyhedral sweep angles etc affect LID ra tios rate sink stability programs recommend proper dihedral equivalent angle optimum spiral oscillatory stability given specific information about models customers getting improved versions programs libraries cost post age handling some cases mailed cost Someone out money would never make such offer Dodgson Designs new newsletter Bob Dodg son has another first among Sailplane kit manufacturershis own newsletter Its called Second Wind comes out twice year costs buck copy Its well worth reading especially fliers already Dodgson planes considering taking plunge address Dodgson Designs 21230 Damson Road Bothell WA 98021 telephone 1-212/776-8067 Dodguon Gliders excellent machines no other line Sailpianes has same almost cultllke following first issne runs 10 pages includes Titillating Tips sent Dodg son Glider fliers Bob gives 25%-off certificates description Bobs new Orbiter kit 59-in-span Hand Launcher designed Eric Jackson Portland sells $65 Bob got started kit making back 1972 much other interesting material wanted reprint some stuff SW #1 see Im way over allotted space will save next month 170 Model Aviation FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident