Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO
Edition: Model Aviation - 1990/03
Page Numbers: 80, 81, 82, 168, 171, 172, 173, 174
Grouped together photo modified field components required establish extremely accurate speed runs Grouped left receiver end systemthe servo-actuated remote switch top modified stopwatch left cassette tape recorder center 49 MHz walkie-talkie Grouped right photo transmitter end setupthe modified transmitter other walkie-talkie TIMING first annual Schneider Cup Reenactment turned out easier originally anticipated highly success ful event presented Desert Hawks Model Airplane Club Lake Ha vasu City AZ November 1989 speed timing part competi tion pilot attempted fly model target scale speed related ac tual flying speed achieved full-size Schneider raceplane year model represented quarter-scale 1931 Supermarine S6B example would attempt fly one-fourth 340 1 mph flown British entry 1931 85 mph assigned task developing accurate foolproof method determining speed models competition assistants obtained radar gun made some attempts measurement no results stealth models dont seem have much radar signa ture Besides prospect sitting ar mored boat directly path Giant Scale racing seaplane models engines snarl ing pilots hadnt met flew top speed low altitude didnt fill enthusiasm quickly abandoned radar gun idea despite objections col leagues FAI Sporting Code includes guide lines determining speed model airplane official world record purposes decided pattern approach after rules model timed over 200-meter course both directions real problem procedure start ing electronic stopwatch model en ters course stopping 600 ft away other end could done simple modifi cation stopwatch 600-ft length wirean awkward undertaking especially beach throngs spectators trip ping over wire eventually occurred 75 MHz model boat radio could used substitute 600-ft wire no possibility interfering airplane radios Thank AMA Frequen cy Committee Press button trans mitter end course could made start stopwatch remote control could stopped another person other end course usual way servo-driven microswitch obvi ous approach such device re sponse time isnt really fast enough job adequately best would take two tenths second would give several-percent error run about five seconds Although amount error no greater what would expect radar gun reasonable dis tance off direct path airplane knew could improved much trouble servo contains electronics acti What seemed like formidable challengerecording speeds Giant Scale racers screaming speedsup 85mph ac curacy lOOths second recording scores real timeturned out easier anticipated little electron- ics program tinkering Heres done U Frank Kelly 80 Model Aviation 1 / Left The modified servo sans housing gear train After some tinkering found simply connecting relay between motor lead ground response time between six eight milliseconds achievedmuch better hundredth-second resolu tion stopwatch Right arrow points modified area simple two-channel transmitter consists small snap-actiQn spring-return switch mounted top transmitter connected three added resistors See text detailed information vate electric motor gear train drive potentiometer output shaft null simply replacing motor diode five-volt relay should pos sible actuate relay few millisec onds tried worked re liably tinkered setup some time Though lacked detailed information about what goes inside servo electronics assumed latter included bridge cir cuit four power transistors capable driving small electric motor either direc tion extensive electronics laboratory consists simple VOM didnt have much go did find solution however usual turned out simpler first attempt relay connected between motor leads ground works like champ Response time six eight milli secondsbetter hundredth sec ond resolution stopwatch relay contacts make completely isolated inter face stopwatch As long two stopwatch operators coordinate ac tions system capable providing desired results set four miniature walkie-talkies 49 MHz FM completed equipment providing necessary communication between timers also caller backing up pilot re corded numbers Testing verify system worked intendedand convince everyone cluding myselfI asked volunteers flying field join measur ing out 600-ft course level section highway just outside town ran car through course cruise control 10 times exactly 60 mph half runs direction half other team members doing timing no pre vious experience task put tally out loop eliminating possi ble prejudice established speedometer error 43% average calculated speed 584 mph standard deviation 10 runs 07 mph 12% other words measurement ac curate speedometer sys tem error principally response time operators themselves about % Both operators estimated able push buttons within about three feet 05% course length cor rect position front car thought could better air plane bit farther away Course setup planned obtain theodolite laying out course available needed found alternative method proved simpler Since wanted 600-ft course 500 ft straight beach set up line sight between two ends course measured beach sighted 900 line out placed buoy Conveni ently distant mountain peak also line sight other timing sta tion simply sighted same moun tain dropped second buoy provid March 1990 81 innards servo-activated remote switch modified servo its own foambacked housing bottom switch top normally open con- typical example beautiful Giant Scale racers competed Schneider Cup facts relay connected couple Reenactment -scale Kioritz 37-powered 1925 British Supermarine S5 flown feet wire subminiature 25mm first-place victory Robert Heitkamp Juneau AK Robert Jim Wilder Lou Bennett phone plug connects stopwatch Gastineau Aeromodelers Society constructed campaigned beauty team Left The authors van housed Apple lic computer used together modified programs software tabulate speeds scores real time both contestants spectators Right author seated command control center Because hotel mostly occupied contestants no problem tapping hotel rooms extension cord AC power ing nearly parallel lines sight two ends course program al tered take shorter course account get speeds Other applications remote switch can used variety model applica tions whole thing can easily built single evening materials readily avail able Radio Shack store similar source Its smaller lighter stan dard servo consumes less power Two relays could operated indepen dently same servo electronics little extra effort could used spare channel remote switch controlling navigation lights Scale model auxiliary propulsion motor Sailplane operate magnetic latch variety other things subject limits imagination transmitter switch can made select desired channel location existing control needs relay actuation example snap-roll button stant actuation required no transmit ter modification will necessary first disconnected three wires pot mechanically connected control sticks noting zon nections future remodification original setup transmitter bor rowed measured resistance center electrode end electrodes pot first stick way over end center finally other end sure disconnect wires before measure resistanceit makes difference case pot measured 44k total resistances ends two extremes 27k 09k respec tively active usable area pot 800 ohms less one-fourth total resistance use values transmit ter Use ohmmeter determine what need best can values resistors available local Radio Shack store Close good enough settled 33k two 10k re sistors SPDT switch will cause nor mal unmodified servo channel snap extreme position other regardless control stick position Contest results real test new sys tem put service observe re sults demonstrated earlier necessary get average up wind downwind legs FAI rules anticipated some difficulties planned record verbal Ready Mark two timers mi crocassette tape recorder playback re cover data necessary practice used recorder never occasion play back also backed up system second stopwatch operated manually verbal input did have occasion fall back system couple passes operator missed button oth erwise system functioned planned programmed pocket calculator provide miles per hour percent off tar get speed time input Usually able give information pilots caller walkie-talkie few seconds af ter plane finished course turning around next pass end competition surprised find six 10 contestants com pleted time trials flew within 4% tar- 11 - 2777KI7~ = , - 0 ___a II-- Transmitter modification small snapaction spring-return switch mounted simple two-channel transmitter con venient location connected three re sistors shown pictures Servo modification Servos produced different manufacturers alike HowContinued page 168 much downsized sample sidewaysprinting AppleWorks spreadsheet Zfolded ordinary 8in-wide computer paper feature greatly facilitated posting scores piece sideways printing feature available through software package Funk Software 82 Model Aviation PERFECT PRIME * ISA QUICK _ WHITE PRIMER Perfect Prime dries flat white providing excellent base coat will distort critical color matches Perfect Prime intensifies true color depth Primes surface wood fiber glass plastic metal paper fabric coverings Sands easily PO Box 2480 usky Ohio 44870 419797-2180 Poxakeet SILpCJL Po4i Paijiswk 40. FREE CATALOG Al Ti4etzofs i4sMg iducpiae 3525-C SE 458 Caurt Scala Florida 32171 904 694-3531 very large contingent local Chicago Racing en thusiasts year event held Ri vahl School parking lot outskirts Rockford IL contest traditionally held end October Midwest contests have long since become history aircraft requires profile body 300sq-in wing plain-bearing single-bypass standard production engine addition seven pit stops required 700 laps cases competitors timed two separate officials us ing two watches year predominant engine K&B 35 plain-bearing typically equipped venturi restrictor suction fuel feed consid erable amount time spent various com petitors honing cylinder liner mating piston-and-ring assembly liner Another trick use high-performance stock 35 bushed connecting rod instead un bushed comes engine majority propellers used aftermarket fiberglass units diameter/pitch around 8 x 7 thinned cut down slightly improve rpm fuel tank required have fill exit tube diameters no /8 no board chicken-hopper-type tanks permit ted Uniflow standard suction tanks types allowed event has become extremely popular novice well semiprofessional enthusi asts airspeeds usually just over 100 mph year decided run two-up Racing since unusually windy situation prevailing day contest Larry Dziak Sr fastest airplane al full second K&B 35s piston/ring/ liner fit produced excellent compression horsepower 5%-nitro fuel supplied contest organizers speed absolutely superior ran fuel tank problems ap proximately 630 laps required fiveminute pit stop remove complete needle valve assembly clean reinstall reset needle valve dropped Larry stand ings first fourth place times 36 37 minutes excellent 700 laps aircraft using suction fuel feed plain-bearing engine seven re quired pit stops John Ballard first 3638 John Stroiny second 3737 Larry Dziak Jr third 3745 Larry D Sr fourth 3827 700-lap race finalists placing close together really put pressure contestants Several competitors merely blew glow plug make extra pit stop factors reduced placings low end list Any small fumble put other 20odd competitors out money New prop manufacturer received letter Mike Hazel Salem OR concerning involvement producing quality fiberglass Racing propellers Mike sent example han diwork form 9 x 6 Slow Rat prop Mike will making props Scale Racing Rat Slow Rat certain am sure will also make other selections Slow Rat prop sent excellent quality cleaned up balanced minimum filing formation price list write Mike Hazel 1073 Windemere Dr NW Salem OR 97304 Cleaning varnish out Cox 049 cylin ders can hassle recently received informa tion concerning alternative method accom plishing needful task As Half-A enthusiasts aware spo radic performance losses drifty needle syn drome exhibited Cox /2A engines can gen erally improved devarnishing bore cylinder past articles Ive described use 0000 steel wool end wooden dowel accomplish procedure received newsletter published Soci ety Antique Modelers edited Bob Angel Santa Maria CA contained informa tion product known Naval Jelly could used accomplish devarnishing Bob indicated particular product nor mally used rust-remover gel can swabbed Cox cylinder using Q-tip removed brush soap water varnish other contaminants cyl inder bore said completely removed havent tried yet after next con test am going try cleaning several cylinders using method As always solicit contributions form ideas photographs questions com ments Timing & Scoring/Kelly Continued page 82 ever since operate same prin ciple isnt necessary know much about perform required modification used old kit servos contained tiny circuit board inte grated circuit few discrete compo nents Since feedback pot 5k con nected two 27k resistors original lo cation feedback pot mounted five-volt relay servo tape con nected coil motor lead ground black power wire normally open contacts relay connected few feet wire 25mm subminiature phone plug stopwatch Thats Continued page 171 Almost Ready Fly. Requires few hours assembly. Includes necessary cr~r~e. Balsa construction precovarad 20-25 SIze CHEROKEE 48 wing apan Special 8V4G46 Sia SHARP 40 SIze now avaIlable 55 Sf Foinn Core Sheeted Wing S&H127 *600 BLBWPO Box 3634 CrrItos CA 907033634 i wee maew Dealer 2131946-12702OSlze-$ 9995InqulrleeCOD MpeeyOrdeoe 40 Size 56AcceptedCleckeAeceptedteflow7eddltlaaleldeye 168 Model Aviation Timing & Scoring/Kelly Continued page 168 parts easily fit half servo case battery power switch receiver modified servo mounted utility box make neat package Stopwatch modification Electronic stopwatches typically display elapsed time LCD LED digital readout have push button start stop quartz clock normally just contact closed button pushed Its simple matter install subminiature phone jack parallel push button Parts list Everything need can pur chased Radio Shack servo youll need two A-watt loose-tolerance 27k resis tors five-volt miniature PC boardtype relay Radio Shack part no 275-243 transmitter youll need three 4-watt loose- tolerance resistors 33k two 10k stated text SPDT momentary switch part no 275619 Youll need blue plastic project box part no 270-222 hold battery re ceiver switch harness modified servo Youll also need connectors required type electronic stopwatch SCORING first annual Schneider Cup Reenactment consisted three sepa rate parts first used established AMA Sport Scale rules second part pilots attempted fly models re produce scale terms actual flying speeds full-size Schneider racer pro totypes quarter-scale 1931 Supermarine 56B example would attempt fly onefourth 340 1 mph flown Brit ish entry 1931 85 mph 0175scale 1913 Deperdussin target scale speed 0 175 x 614 107 mph RC competition know beyond FAI world record trials abso lute model speed measured third part consisted reenact ment itself picturesque trans planted London Bridge arching over beau tiful Lake Havasu large crowd specta tors watched Giant Scale racing floatplanes flew prescribed course over lake Points awarded realistic flight performance international panel distinguished judges meant great deal numerical manipulation required determine scores Commonly such events final scores determined until long after competition has ended Contest Director staff shuffle scraps paper push buttons calculators fi nally report results big board determined have results available con tinually real time contestants spectators needed place plug venerable little Apple lic com puter began writing program scratch Basic quickly came conclusion could done better faster AppleWorks spreadsheet AppleWorks clearly greatest combination word pro cessor data base spreadsheet computer know Its marketed Claris no Apple II should started listing headings col umns needed display data chronological sequence simply serted appropriate equations places calculations required went faster anticipated After first line completed simply copied other lines evening basis what required point possible observe shortcomings system Since obvious data xould fit single 85 x 11 sheet called up Sideways commercial software package Funk Software can print AppleWorks spreadsheet sideways Z folded computer paper AppleWorks has built-in superfast sort routine rearrange data descending order score However set up blank row af ter fifth score make easy read sort routine moved blank lines end no way indicate place numbers Beagle Brothers Macroworks provides enhancements AppleWorks allow reproduce se lected sequence keystrokes set up sa-K (sa represents solid-Apple key used like control key con junction another key create mne monic function keys calculate val ues sa-B sort scores high top sa-E reinsert blank lines af ter fifth position sa-F find Cell AW8 contained highest score sa-S insert 1 2 3 etc PLACE column after rearrangement addition sa- made things rapid sequence response single keystroke sa- returned cursor home position Cell Al sa- sa- displayed custom Help screen Because guests Nautical Inn respected resort hotel island Schneider Cup Reenactment took place contestants event easy gain access AC power van hotel rooms exten sion cord parked lawn computer printer mobile club house judges sent numbers up little scoresheets immediately after heat preprogramming macro accept judges input able let com puter average scores still have input number recallable screen making mess printed output results took about min ute make calculations another five minutes print three pages data March 1990 171 VINYLWRITE CUSTOM LETITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced prealignedsaving hours cutting fuss aligning individual letters decals text custom corn p uter cut 3M PSSL PROTSCflW BACIG Premium cast vinyl thin olors s les including Military B ock high NOW ALE StencilMas&1 Color Outlining IPriced right no minimum charge IEg AM4 plus number high $1 2S I1high 2high plus$125P&H Call write _____________sample ITSFREE pack & sideways partial data saved disk periodically Up-to-the-minute partial scores order place displayed hard copies large type posted wind shield regular intervals competition progressed system worked very well indeed can adapted other events using differ ent computers equivalent software al though its use limited fields AC power available complaint re ceived throughout meet tegers displayed didnt add up exactly added notice stating calcula tions done computer great precision decimal places displayed After heard no com plaints having anticipated lead ers would grouped tightly altered layout total points column show decimal place appeared tie first place spreadsheet equations Listed significant equations inter pretation PSEL OFF THE CARRIER TAPS 4MA STEP BACK ADMIRE YOUR WDRE YOU RE DONE AA4 Diws Static total J8 G81J818 sum values Cells G8 H8 18 Target speed mph M8 L8*E8 number Cell L8 actual speed prototype times Cell E8 scale model Measured speed mph 08 @IFN8 03409/N8 0 value Cell N8 greater zero enter result dividing 3409 value Cell N8 3409 divided seconds over 500-ft course gives speed miles per hour N8 has yet en tered set zero initially enter zero Speed error percent P8 @IFN80 lO0*(08M8/M8) 100 - If value Cell N8 greater zero Custom Letter Today VINYLWRITE Way first subtract M8 08 divide M8 multiply 100 Otherwise enter 100 Speed score Q8 @IF@ABSP8 5050-@ABS(P8)) 0 absolute value regard sign value Cell P8 less 50 subtract absolute value P8 50 speed error greater 50% score zero Flight score Heat 1 X8 @SUMS8 Add everything Cell S8 M8 Flight score Heat 2 AE8 @SUMAN8 Add everything Cell AN8 AR8 Flight score Heat 3 AL8 @SUMAG8. Add everything Cell AG8 AK8 ULTIMATE 10 DASH 300 BIPLANE Fiberglass fuselage foam wings Quarter-scale 13 lbs 62 Span ST 3000 Power Leeel 1 Flying Qualities MILF-8785C oIo resarvaSton $75 retuodable deposit includes date package 515 separately Conrpneheesioe kit $554 ortinisised vepainted aircraft $1550 pounerploet radio gear included Sotlslocglon guoransead or yuan snoney back Phone FAX 801-7531971 VISA MC check ca COD Production limited tu eight hand-crofted individually DAEDALUS RESEARCH INCORPORATED PARTS Carry over 300 cowls 70 wheel pants made epoxy glass light weight brittle zero pinholes Send SASE $100 latest cataloa I II iWashable ed CapI Sunglasses rtip up/Down Adjust In/Out ISnap On/Off Imprints Available IUltra Vilt Protected IPlease send _____________ caals Ito enclosedI I@ $795 plus $2 shipping handlingI ILens Colons El Amber El Smoke blueI Cap Colons El Black El White El Yellow El Green El Navy blue El Royal blue El Maroon OGrey DRedI II II II INameI IAddress IcilyI IStuteZip ________I IRETURN WITH CHECK OR MONEYORDER ONLY TO IPIN-NIK SALES PO Box 547Ravenna OH 44265I L 172 Model Aviation El Please send information about imprinting IPLCASE PRINT orders processed upon receipt shipped via teat dana mall OU~URFACi7 VINYLWEITE CUSTOM LETrERING 16043 Tulsa Street Granada Hills CA 91344 818363-7131 fNooiito6PM Pa deMail nider CA tin add taLe II II An anund-uoinnieg design laboratory snve tus creotieg advanced concepts n nilitany civilian Unnuened Aeciol Vehivlea RLASS SPECIALilES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us313 978-2512 New Owners * Steve & Kim Durecki Flight score Heat 4 A58 @SUMAN8 Add everything Cell AN8 AR8 Average best 3 AU8 X8 AL8 MINX8AE8AL8AS8)/3 Add contents Cells X8 AE8 AL8 A58 subtract lowest divide result 3 Total score AW8 18 AU8 Add static score speed score flight score macros following custom macros created expressly contest interpretions Macro Boa-Aoa-9rtn4rtni Comments Sort scores high top sa-B assumed start Cell AW8 executes open-Apple-A arranges sorts column open-Apple9 end file return select option 4 nu merical sort highest top return Macro E down down down down downoa-IRl rtndowndown down down down down oa-IR1 rtn down down down down downdownOa-IR1 rtndown down down down down down oa-IR1 rtni Comments Spaces 5 sa-E also assumed start Cell AW8 move down five rows open-Apple insert R row 1 row return etc Note Long macros like require forced line wraps avoid chopping words half Macro Foa-FCoa-YAW8rtni Comments Find cell AW8 sa-F executes open-Apple-F find C coordinates open-Apple-Y clear end line AW8 Cell AW8 first score return Macro G 1 rtn1 1 2212rtn oa-L EVFOrtn oa-U rightI Comments Static judging entry Col G sa-G changes initial underline la bel 1 value sets up equation 11 22/2 average two inputs sets lay out integer display prepares change 11 22 actual inputs done overstrike mode Macro N1rtn111222/200rtn oaLEVF2rtnoa-Urighti Comments Speed entry Col N sa-N similar sa-G except three-digit seconds hundredths time trials input decimal Macro Soa-FCoa-YAY8rtn oa-BBoa-9 rtn 1 down2down Send $2 illustrated catalog & technical literature ANOTHER GREAT RC HELICOPTER FROM THE WI RANGE OF GMP HELlS Gorham Model Products Inc 23961 Craftsman Rd Calabasas CA USA 91302 818 992-0195 Paper Flying Scale Model Airplane $7 00 *ALL PARTS PRE-CUT & PREPAINTED *BUILD & FLY IN TWO HOURS 4 PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA CATALOG 750 Contains 1000 paper airplanes ostage stamp size 6 foot wing span Gliders rubber powered Diecut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Catalog CORSAIR paput aUtptane aboua $1050 ptuh $250 pOhtAg March 1990 173 Performance Specialties owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violeti Models KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descrIptive brochure Visa & Mastercard accepted Aircraft Racing Headquarter6 PERFORMANCE SPECIALTIES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear hrjbmuameSpecutiu QWJIW RADIO CON5I MOOLtE Available K&B 65 75 05 40 VFNRP 05 61 FSR 05 61 VF 0S Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS 60 FS/FR YS Long Stroke Others Coming Soon Performance Specialties PO Box 4003 Carlsbad CA 92008 619 729-1658 3 down4down5 down down6 down7down8down9down 10 downdown1 1down12down13 down 14down 15down down 16 down 17down18down19down20 down down2 1 down22rtn sa-F1 Comments Enter places sa-S executes open-Apple-F find C coordinates open-Apple-Y clear end line AY8 Cell AW8 first placing return open-Apple-B blank open-Apple9 end file return inserts place numbers 1 22 returns cell AW8 highest score Macro Tlrtnl 23/3rtn oa-LEVFOrtn oa-U right Comments Flight entry Col S-AR sa-T similar sa-G except three judges provided typically single-digit data Macro sa-F sa-B sa-E sa-S Comments CaIc find AW8 sort space place enitnuier us D Scratctt SOUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order hf dont carry Square Cut Tools call tar call well pay shipping us Canadal C 0 0 totral SQUARE CUT Toals N Harbor City Blvd Melbourne FL 32935 Deulea/Dimtributer Inquirim Invited Florida Residents Add 6% Sales Tao sa utes open-Apple-K calculate sa-F go AW8 sa-B sort high top sa-E insert blank lines sa-S enter placings Macro Coa-YA1 rtnI Comments Home Al sa- executes open-Apple-F find C coordinates open-Apple-Y clear end line Al Cell Al top left spread sheet return Schneider Race/Root Continued page 92 Doug Wilber Cliff Adams Bo Limon gave fine formation flying demonstra tion Nutten Specials smoking away pilots made look easy course isnt Formation flying difficult feats Radio Control Bob Martin seems have thought everything two large retrieving boats ready go action young man scuba diving gear case anything sank bottom lake Thats exactly what happened Saturday Richard Pasquelittos Red Macchi MC-72 got lost sun crashed Macchi totally destroyed scuba diver no luck retrieving its costly Sachs Dolmer 42 two-cycle engine lake bottom Besides Pasquelittos Macchi two other crashes Saturday QSAA teams Sopwith Tabloid aileron servo failure Bill Currys fourth-placewinning Macchi M-33 went down after ra dio problems Having good fortune live area nine 10 months year bring great flying weather Ive attended variety conteststhe Scalemasters Tour nament Champions meets Eighth Air Force Fly-Ins Phoenix SAM Free Flight Championships QSAA Fly-Ins Schneider Seaplane Classic Races shows promise becoming yet another world-class meet western contest circuit Expecting least 40 entries next year Bob Martin plans let 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE Will-I ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORT RA DIGICON IM-MSK WE NEED__________ ___________DEALERS 174 Model Aviation can make Quiet. VIBRA-DAMP BEAMS VIBRA-DAMP ALUM TABS HUSH FOAM DISC-LOCKS Send $1 complete brochure order direct PERFORMANCE PRODUCTS UNLIMITED / 7093 E Dodge Rd Mt Morris Ml 48458 313 631-4894 VISA/MO