Radio Control: Soaring

Soaring Dan Pruss AT THE APRIL FAI meeting Paris rescheduling R/C Sailplane World Championships announced 1977 Orig inally scheduled April 1976 FAI decided due number other World Championships scheduled 1976 rescheduling would lessen burden Aero-Clubs involved 1976 gives usthe USAanother year decide team method team se lection Rod Smith President National Soaring Society NSS has appointed Otto Heitbecker chairman committee de sign method team selection Ideas date include Masters type contest would include top standings NSS championship standings SOAR Nationals LSF Tournaments soaring event AMA Nationals previous qualifiers 1974 AerOlym pics Lakehurst Plans include Masters sitepossibly Albuquerquesince its field ele vation 5300 feet approximates South African site Details team selec tion proposal AMA approval will probably finalized announced NSS meet ing SOAR Nationals July extra year perhaps can provide time required resolve inequities still exist various launching devices namely hand tow high start winch AerOlympics last July winch launches considered point winches available high-start surgical tubing 7X stretch factor favored means launching However under rules contest management its problems As result critique 1974 Aer Olympics FAI ruling made December states total length towlines used hand towing winching must exceed 150 meters high start devices using elastic members Unstretched length must ex ceed 150 meters length elastic memberunstretchedmust exceed 50 meters maximum stretched length shall exceed 200 meters end shall tached ground during launching Run ning space hand towing shall limited maximum length 150 meters intent last sentence test athletic prowess hand tower minimize time tow still getting effective launch Although winch popular type launching device US managing contests considered same popularity doesnt exist Europe other parts glider world exceptions being Canada South Africa Seems though Henry Ford made several million long-shaft 12-volt motors just perfect could sailplane winches Henry however installed several million automobiles about ten years ago Maynard Hill took motors harnessed boxplugged 6 volts 12 fashioned drum 1000 feet line long shaft launched Bong Boomer 12-Volt Ford Starter1965-1966 Ford also made long-shaft motor between 1956 1959 harder find 6-Volt Starter Solenoid Foot SwitchRadio Shack #44-610 Lafayette #99H15810 Battery6 Volts 105 Amp hours 105-amp hour battery has capacity provide about 160 launches few have successfully fabricated own line reels drums have failed failure comes result realizing tremendous force built up line taken Winch line under tension model reeled forces layer upon layer wound up line exert enough pressure crush hub axle reel burst Out sides has experienced using /s flat aluminum sides its hap pened using ood Some modelers have tried using /4 5/26 carriage bolts about six inches long clustered form three- fourinch hub wind line same cluster bolts collapsed down starter shaft under load Enough what use Two years ago ECSS now NSS solicited winch information among its membership order come up stand ard winch intent dictate what standard should felt show what majority flyers using would encourage other building winches treat result survey set guide lines no ones surprise Ford starter motor incorporated nearly winches Line reels varied hub diameters two four inches Since survey its generally ac cepted modelers hub diameters three four inches acceptable diam eters provide ample line speed lighter ships must launched degree gentleness larger heavier wing loaded ships have power re quired get same level air six volts standard has accepted winch has 6- 12-volt capabilities much versatile 12 volts can used br larger ships air calm slight tailwind experienced change launch direction isnt prac tical winch 6- 12-volt capabilities continued page 74 August1975 21 SAILPLANE WINCH SCHEMATIC 6-12 VOLT SYSTEMS 12 VOLT NoINORMALLY FORDBATTERY6 VOLTS USED STARTERCLIP1-6 VOLT BATT 6 VOLT SOLENOIDFOOT GROUND TOSWITCH STARTER - B MOTOR FRAMEAA [1 No2 EXTRA CENTER POST\J6VOLTsI 6V0 LT CONNECTIONBATTERY FOR 12 VOLT OPERATION 6VOLT TO 12 VOLTS A REMOVECABLE FROM BATTERY No1 AND CONNECT IT TO INAL OF BATTERY No2 B INSTALL SHORT JUMPER CABLE BETWEEN 111•TERMINAL OF BATTERY No1 AND" TERMINAL OF BATTERY No2 CL Speed continued page 29 next competitor has remains very alluring Speed events element luck cut bare minimum Normally competitor best pre pared wins reasons interest Speed recent past has suffered big reasons lack organized control Speed competitors themselves has virtually no control new innovations tech niques used Speed regardless impact innovations techniques have sport example unlimited use Monoline 1950s made 2-wire systems obsolete overnight also made building tedious difficult consequently made dif ficult some fly down right impossible others point am making unrestricted use Monoline speed no element control dramatic effect par ticipation sport Again unrestricted use tuned pipes early 1960s same dramatic effect speed events Tied lines allowed no restrictions imposed will also have same kind impact Before anyone gets idea am against progress gen eral Monoline tuned pipes tied lines specifically let hasten dispell thought What am against unrestricted use dra matic innovations changes overnight make present methods equipment obsolete cannot have positive effect level competition sport opinion Monoline much easier fly 2-line tuned pipes challenge consequently fun work un controlled use major innovations has unquestionably dramatic effect popularity Speed recently have Speed flyers banded together through Speed Advisory Committee effort turn down-trend around obviously took long time Speed deteriorate now will take long time Speed come back have no doubt patient make some good decisions re gards making Speed appealing viting very strong desire race go fast will have its effect competition modeler will once again see Speed claim its spot glamor event model competition could two three entire columns what good what bad Speed time am trying hit high spots first effort will stop However before stopping subject what needs done would like point out dramatic need National Speed Organiza tion am sure much could done Speed through such organization time action active speed flyers should give some thought National Organi zation possibly meeting can held 1975 Nationals further discussion subject would willing act coordina tor project request interested parties correspond propose format such organization feature issue Charlie Anastons Tigre X-15 Powered Ship straight forward traditional design built Harters FAI Pan Charlie has reputation being meticulous builder accompanying photos tend prove point design features 008 fabricated metal wing tapered maple spar giving thought trying hand particular design dont let metal wing scare off -thick white-bass wing same planform will work just well decide use bass instead aluminum wing ma terial leave thickness wing chord taper 3/16 tip highly competitive A-Ship easy look important compe tition stand point stable flying easy construct can recommend ad vanced competitor well beginner balance point center gravity shown 3-view critical areas design care should given assure changed way assure pre fabricate parts design semiassemble ship tape rubber bands move wing back forth fuse lage until CG has located Now ship can disassembled wing perma nently mounted allowing just little paint procedure should followed time build Speed ship regardless times have built particular design Airframe design does allow variance pan wood weight amount paint used wing stab should mounted fuselage zero degrees incidence also make sure controls hooked up work freely X-I5 used Charlie highly modified stock X-15 design should give beginner excel lent chance competitive join fun speed flying RC Soaring continued page 21 four-inch hub six-inch drum 125# test twisted line has used successfully launch standard class sailplanes sixounce wing loading same system success fully launches Il-pound KA-6 24ounce wing loading parts mentioned before can obtained auto parts store exception foot switch care put little project starter motors can usually purchased around five dollars auto salvage depotsjunk yards watch out dog New rebuilt ones about $2500 Its usually gamble what will get junk yard version new bushings cheap easy replace armature has cleaned up very costly job Two drums currently available excellent worth price can ob tained following Westlake Mfg Co 2205 Hollywood Way Burbank CA 91505 Don Goughnour Rd #2 Red Lion PA 17356 Westlake reels fabricated using aluminum casting hub either three- four-inch diameteryour choice sides reinforced aluminum Reels type have used successfully past three LSF Tournaments Price$2495 plus shipping charges other reel solid aluminum casting hub diameter 3 1/8 inches reel hub diameter less four inches can ef fectively have hub diameter increased tow-line price Goughnour reel $2995 hub diameter 3 inches reel hub diameter less four inches can ef fectively have hub diameter increased tow-line price Goughnour reel $2995 Goughnour also sells complete winch $14995 updated version earlier design uses aluminum casting base about 40 contests already stated 1975 NSS Championship Circuit winches standard components imperative make running contest smoother assure contestants similar launching equipment wherever compete League Silent Flight recent p011 taken among Leagues 1200 members March 1975 list resulted no change decision Eight Hour Slope Requirement League also will recognize FAI records FAI world championship winscontinued THE VIXEN VIXEN has advantage bong snalt aoooonical build opanate ited aea eguiing twochannt adO taith Span 34 Ininiata tesos small bttey Otok Kit Aoeatgh sq taatuas include pesnision bandeawod sanded Weight.2t pets AVe loan saing end conOleta hadsaaO Eogona..Coo TD 049051 ContoltAileon alenato Fo ponpt delivao send cattliect chant nonao onda adding $155 tan shipping handlin Wienonsin eaidents add 4% eales tan So,yno COO odes CI ONCEPT MODELS Von Deala 0 Odaa Diaot 74 Model Aviation MORE w/MTIOL ofl same powerYELLOW j8sterPROPELLE ~eeedePtC~ \ 6~ 3-NAN Metallic Aluiuu C4 Tractor 5-354VdCh 6354304 6364354 747678504 848688654 9-49-697q8 10-410-6854 50411-4 11-6 11-81 8-688 125RC 12-4 5616 525 126 150 104150 GRISH Rose ST JOHN INDIANA 46373 wads Pusher bYv-9 5/4 6-3 6-4 354 8-6 554 96 106 1 3 Blade Tractor 5354 63 64 504 3 Blade Paaghuo 015063 504 sturdy reliable easily repaired low Cost trainer No covering painting decorating required Made water resistant corrugated cardboard Builds hours 0 uding radio installation U0 -Jw Field Box kit included Vital Statistics aATFRIAL- ARC IA lA 5 IIUITAIIgIA AIRFOIL UHAIHIHAIA aIAE.A NAth No fljIeIjHjAfl bAIT GAAS STAR AREA TEq SEAN NASTAR AIRFOIL-Flat LENGTH- RiWEIGHT iSNIH NSI 21-28 AA IlR~ANSIgTI ASPECT RATIO124SURFACE LOADING TYPICAL R01 PH SR-Il WING AREASCANS ADIRFORAL U Cl Cu Cu Cu 5-0 eat Cu U Cu C NI 55I Nssi .5I Ag RD 0 0I c 1 V o o I OR A4 crCflICI aSaLU CO i ACuflI 40I oZ4O 1 annual LSF Tournament scheduled late August Bob Hahn John Donelson will co-direct event As past pre-reg istration required order acceptance will members highest level achievement downLevel V Level Leagues ever expanding member ship plans under way establish Tourna ment 76 contest would held same week-end four locations-California Dallas Elmira Detroit same tasks would flown four sites Winners sites would undoubtedly figure fly-off first FAI World Cham pionship RC Helicopters continued page 20 accessible moving hands controls Also has dual trims functions normal other almost like stick command test models presently being flown 27 72 MHz 6 meters Ill soon flying test models will report first hand future columns Needless say interest problems much ap preciated will go unrewarded Having carefully checked over display map locating helicopter booths first draw attention DuBro After howdy glad handing got eyeball newest DuBro Tn-Star Tn-Star has sev eral unique features 40-engine size have three popular fuselage configura tions basic Tn-Star features Scorpion preformed plastic body also available Enstrom Hughes 500 bodies can flown less body training purposes takes just few minutes change can done flying field should get tired look ing same old thing desire change workmanship looks much refined im proved did see fly movie showing Dave Grey putting through paces also new collective pitch option display much time yet being debugged flown Tn Stars$22995 Enstrom Body$2995 Hughes 500$3495 Collective pitch supposed adapt Hughes 300 Shark copters $12900 Just across aisle Kavan Allou ette 40 display very rugged com pacttypical Kavan high quality heli copter shown privately Toledo year ago has much refined since programmed production May 1975 Sun day afternoon flown cold strong winds very smooth stable though fixed pitch design also incorporates Hiller system should fine ma chine $25000 category writer promised time complete report will given Polks Hobbies Inc New York English M&M Lark display small 19 29 size helicopter has plastic fuselage canopy Also cockpit preformed everything fits together neatly weighs 4 pounds flies off bench Lark kit very complete has good step-by-step man ual flying instructions am presently flying Veco 19 complete report will also later column MRC booth several new helicop ters display Dieter Schluters new Heli Baby Phase 2 helicopter features bolt-together construction claimed easy con struct two three evenings needed box field fact heard Schluter can evening Other rotors two pieces wood used looks like Hughes 300 fixed pitch rigid seesaw engine 40 6 7 lbs $25000 May delivery MRC also displayed what called Chopper year Helicopter System system features Box Kalt mechanics fixed pitch Box rugged plywood frame simple mechanics early training periods As skill advances can add sophisticated mechanics beau tiful fiberglass fuselages such Hughes 500 Bell 212 fuselage kits very highly detailed should good scale com petition Finally can add collectivepitch option system should welcome wanting make plunge little time No prices delivery date available Perhaps unique small helicopter Graupner booth Bell 47G practi cally plasticyes rotors factory balanced well replacement blade practical 47G quite scale appearance flight has single screw adjustment blade pitch very simple snap-in device holding main rotor blades An HB25 engine designed 47G cluded $28500 Weight 4 pounds landing skids slightly optional pontoons new small choppers become available promised should able look forward pleasant summer flying cheaper choppers Royal Products scratch-built helicopter booth device under develop ment could prove what need device governor keeps rotor rpm constant attached main rotor shaft feeds impulses throttle col lective servo state can detect lean engine run will feather rotor lighten engine load Around $6000 will available soon promised tell make Ga zelle competitive month Toledo report took space expected will have wait until next month pictures products will worth wait continued page 76 August1975 75 Dubbed Suds City Fly-In Third Annual Sailplane Contest held August 2-3 Aero Park Airport Menomonee Falls Wis. co-sponsored Old Milwaukee Beer Milwaukee Flying Electrons first time almost 40 years major manufactur er has co-sponsored model aviation meet providing trophies down 5th place Class both days T-shirts posters help promote meetwhich open RC flyers both Standard Unlimited Classes Close 100 pilots six-state area expected attend Forty-four awards will made including Grand Champion Best Junior