Radio Control: Soaring

Radio Control SOARING Dan Pruss IF YOU THOUGHT bikini-clad lovelies paraded about F3B World Champ ionships Sacramento last summer photographed forms wrong came second First place honors went 12 winged beauties belonging Swiss team 12 beauties identical name Spartakus Three-views model appeared April 1981 issue ModelAijation photos October 1981 issue month dont see average Saturday aftemoon fun fly matter werent seen other ships World Champion ships first split rudder used air brake photos thousand-wordtrick some added notes include fact rudder halves made molds fiber glass epoxy balsa serving rudder two halves fit together well can hardly tell trailing edge splits open rudder still functions rudder both open halves move rudder commands rudder brake actuated closed loop system uses Dacron line pulls rudder either side no push similar some full-scale aircraft rigging separate servo actuates mechanism enclosed between rudder halves affects braking action Worth bother Swiss dont think Though does work speed isnt reduced much quickly enough However potential wing trailing edge speed brake theres good chance youll see Spartakus II some sort wing flap/brake system Its stire bet wont see spoilers second unique feature Spartakus hidden fuselage its gem engineer ing form movable center gravity CG other modelers Sunday fliers world class vary ballast weather conditions flying tasks Spartakus school keeps models weight constant shifts small slug affect center gravity After deciding go latter route few problems did arise main ones shift weight much weight use far shift after shifted keep place during accelerations speed runs attitude changes hard landings answers run tube back fuselage farther back could extend less weight would required CG changes case Spartakus builders 90 centimeters almost 36 inches work before running linkages rudder elevator However 90 centi meters werent straight line tube run far forward possible nose along servo tray back along tow hook release tapered fuselage make tube light possible fibreglass roving used next problem make tube conform curves fuse lage Simple use shaped metal core form roving problem get rod out glass tube solution found works very well Teflon tubing used has OD slightly less ID rovings slid over shaped metal rod After epoxy has cured Teflon tube slid out metal rod Small pulleys mounted end tubing Dacron line runs along outside ballast chamber tube through 42 Model Aviation Split rudder used speed brake Swiss F3B Teams Spartakus models Dacron line feeds bottom rudder around small pulley runs two arms near center rudder Pulling line spreads rudder halves Two torsion springs hold rudder closed uottom view OS rudder shows rudder halves hinged single post Hinges plain old Scotch tapebet expected something compli cated Upper section Spartakus split rudder deployed Rudder post hinges pins allowing rudder action brakes extended innards Spartakus 1 Potentiometer used replace ballast servo 2 Ballast tube 3 Servo wheel driving line ballast 4 Elevator servo 5 Rudder servo 6 Speed brake servo lead weights segmented tied together facilitate sliding through curves back out tube around pulley end drive weights standard servo used However potentiometer removed servo motor drives output wheel around Dacron line runs Replacing servos pot 201 potentiometer about 30 per cent used shift weights 90-centimeter length As shown picture whole unit mounted servo board board four servos along ballast tube removable Unit Total ballast weight required 150 grams about 53 ounces Total CG range measured wing root 32 percent 48 percent An auxiliary control transmitter indexed through prior Continued page 109 LEISURE FLIGHT SYSTEMS MORE POWERFUL THAN ASTRO 5 WITH TWICE THE FLIGHT TIME would like have 05 size motor delivers super performance flies 8 10 minutes would admiring digital charger Leisure Electronics booth MS show Roland Boucher showed motor said could just Roland says something works well listen because Roland brother Bob pioneers elec tric flight US really know electric flight start finish motor black label Leisure Electronics Aircraft motor available pattern racing wind ball bearings both ends balanced armature trued commutators retail price $451 Roland suggested trying motur 05 plane using six sub-C NiCds 6x4 prop did revelation Astro Stunt plane own design flew like pylon plane could spins ioops rolls two channels ease fact Astro Stunt flies better motor other flies well could hardly believe level perfor mance 6 cells 2 less usual Roland right about duration too Im getting consistent 8-10 minute flights stunting throughout flight just going over maximum altitude lye several fliers say first electric im pressed Ithey flew gas thought catching lot thermals Flight time up 13 minutes Kraft Cardinal Fantastic climb performance powered Sail Planes Goldberg Gentle Lady Midnight Models Electrolite Craft Air Drifter Marks Models Wanderer Excellent performance Sportecale Shoestring flies 7 minutes does full AMA pattern Full AMA D pattern including inverted flight outside loops & vertical rolls Midway Models Fast Eddie Racer LEISURE ELECTRONICS 11 Deerspring Irvine CA 92714 Ph 714 552-4540 stay up long No thermals necessary just good engineering Leisure Electronics did some ground testing tne specs 12000 rpm 6x4 prop 14 amperes draw all-up weight system batteries prop equals 175 oz two ounces Astro 05 Astro Stunt weighs 30 oz Cannon receiver Bantam midget servos 250 mah receiver pack two channel Astro Stunt 42 inch soan 290 plane 100/o flat bottom airfoil Astro Stunt kitted Astro Flight very similar would ideal motor April 1982 43 ervo cray anu oaiiast tuoe removable unit Tube shaped fit fuselage MHU now cor sometnung simple nrae prevent iine unwinding winch merely rubbertipped arm pivots Out contact drum channel weight 34 oz POWER MITCH POLING July 81 MODEL BUILDER magazine has undergone same transition have seen Sport Scale Models have become increasingly complex sophisticated external detail together dummy engines complete cockpits 15-ft viewing dis tance 11 ft FAT detail visible judges influenced spite rules Upgrading inevitable events ception has lost some simplicity made popular have reached point Sport Precision models almost look alike differ ence under AMA rules flight schedule FAT rules difference vanishes both F4C Stand-off use identical flight procedures question arises two events France innovative approach blending two classes Models staticjudged distance given quick close scrutiny check scale detaiL value placed detail minimal scoring similar blend F4C Stand-off under FAT rules may never happen may distant future may imminently close comes select World Champion ship teams teams would serious dis advantage selected using FAT rules Because diminished interest Precision Scale four entries select team three Nats may worthwhile perpetuate class expected influx ranks Sport Scale never materialized However modeler can given credit detail special technical features though minimum value scoring would encouraged produce quality upgrading Sport Scale would continue pace equal other countries Flight scoring would presently done Sport Scale Only static scoring would change slightly described score detail viewed close-up cant really assume Precision Scale will inevitably die may need perpetuated team selection means FAT decides blend its two classes insurance US models championship quality Ottawa World Championship Precision entries outnumbered Stand-off will interesting see ratio between two classes Reno future Precision Scale may determined Bob Dolly Wiseher Rt 1 S-221 Lapham Peak Roa4 Delaflel4 WI 53018 RC Soaring/Pruss Continued page 43 calculations flier knows CG will set Durationcalmorwindy conditions Dis tance Speed Horizontal stabilizer incidence settings complement CG settings also enter picture gadget worth effort bet Now bugs out its way particular Swiss group will treat ballast center gravity Incidentally modelsall 23 12 brought Sacramentoare identical respect interchangeability components effort make lighter color left off wings tail later versions reduced weight sevenpound white ships about 625 pounds mentioned answer questions arose since World Championships report Well land Spartakus chronographs left-handed sewing machines need always E Quadra Plus Offers YouaMuch Power. Lot Better Idle revised Quadra engine ready mount airplane following already done! Crankcase has replaned tighten up main bearing very close tolerance resealed new special compound thus eliminating leaks Another crankcase bolt added maintain its tight seal will virtually stay clean oil-free expensive engines has E & R balanced flywheel greater performance smoothness Tatone Motor Mount Muffler Quadra Carburetor adaptor turns carburetor direct servo hookup eliminating extra linkages also lets set needle valves engine running properly installed Plus motor mount already drilled taped use Lord vibration dampeners desire Dampeners available option E & R revised Quadra can easily identified high-heat resistant black finish block crankcasePRICE $16995 SPECIAL LIMITED TIME OFFER $15995 Air-Cleaner Choke Assembly Add $600 ea Airplane Kit Radio Engine $300 up 10 lbs UPS handling Tatone Muffler Tatone Motor Mount N N 1 10 Edgeley lllD 58433 701/493-2015Hobbies OVER 50 CONSECUTIVE STARTS WITHOUT RECHARGING INTRODUCING THE NI-STARTER IN PAT PENDUIG new completely revolutionary concept power glow plugs model cars boats air planes helicopters anything using 15 Standard plug glow engines Rechargable lup 1000 timesl Fits pocket Works sideways inverted Fitsthroug hcowlings Uses HeadLock TM plugadapter S lay son plug propeller IncI charger & instructions go day guarantee After anything fails Inormal usage will repair replace Ofly O up full yearfl SEE YOUR DEALER OR CALL US- BANK CARDS OK COD OK YOU PAY SHIPPING $1995 See Dealer 13506 Glendunee Dr Herndon VA 22071 ________________ SERVICE 703435-5805 ________________ April 1982 109 Lord Shock-absorbing Dampeners angina DON GODFREY wrote about Feb 1982 MODEL AIRPLANE NEWS column E & R HOBBIES stocks other accessories send $1 00 complete catalog - &PARTS CRICKET KIT$19995 w/lrwine Eng* *27995 wIK & B 35 Eng29995 *incIudea heat sink & muffler built-up radios RTF available prices OMP COMPETITOR 45-80 Powered Sport Competition Flying Complete Parts Support HIROBO SCALE HELICOPTERS 50-60 Powered Tow Cobra Ranger Lama uois ultimate scale helicopters PLAZA HOBBYCRAFT L 2473 E State Street Sharon PA 16146 __~1~ Call 412-342-574~ geared complex gadgets brake system winch couldnt simpler brake arm fitted heavy rubber crutch tip-like device used shock-mounting heavy-duty motors machinery place against drum has proven effective clutch/bicycle chain systems 9D tennis shoe As auto racing some engineering innovations designed competition circuits find way down everyday driver some modeling ideas find way down Sunday flier split rudder/airbrake system isnt effective enough seven-pound fast-flying Spartakus could find place much lighter duration-only floater type As variable movable center gravity too could applied types flying straight duration-only LSF cross-country tasks added fact having fuselages cross sections larger FAI ships makes variable CG idea worth looking ever take gloves off fiddle ballast change during Detroit Sno Fli 20-below-zero wing chill factor youd start clearing workbench now LSF Officers 1982-19S3 Recent election results follows Warren Plohr president Bob Sommers vice-president Ken Bates secretary Cal Sobczinski treasurer Announcement made 1982 will again year LSF Regional Tournaments Dates will August21 & 22 1982 Sites details later long-awaited four-color Mylar LSF em blems now available self-stick types decals come three sheets three sizes three-size set $400 plus 50 postage single large emblems included three-size set price $150 plus 50 postage Send League Silent Flight Box 39068 Dept L Chicago IL 60639 Good Lift Dan Pruss Rt 2 Box 49D Plainfield IL 60544 Corrections Somehow managed switch captions two pictures page 36 March issue affecting John Brown Terry Edmonds Actually AMA Nats Champion John Brown Icarus shown picture bottom left Ter ry Edmonds Callisto shown bottom right Another problem picture Ken Bates page 37 caption info should have said Ken modified Sagitta eliminating spoilers sheet ing entire wing balsa apologies parties mentioned author Dan PrussCarl Wheeley Editor Publisher RC Old-Timers/Mathews Continued page 45 Plans Service PO Box 3215 San Jose CA 95156 Although Winged Victory likely could never competitive SAM contest presently structured design certainly appealing interested scientific type competition Joe called Fred Camposcraftsman Fred native Cuba very active Free Flight country years fact executive American Fruit Co time Fidel Castros revolutionaries toppled Batista government quickly convinced Fred 110 Model Aviation Please send me Byron uriginals catalogtsi $500 Catalog price will credited towards initial purchase Name _______________________ Phone StreetorRPOApt4 City _________StateZip have enclosed check money order br $ Please charge MC# VISAS _______ - 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