Radio Control: Scale

Radio Control Scale Bob Dolly Wischer BONUS LIMITS Paris FAI meetings always bring forth thoughts direct effect rules changes future projects model ers FAI rules changes will often lead trend appears happening bonus system RC Scale changes will become effective next year can expected have some consequence outcome team trials 20% maximum cumulative bonus should stop trend toward strategic modeling wherein builder includes bonus features possible overwhelm competition high flight scores Most present-day team models would suffer too severely 20% limit three- four-engine models would reduced equal engine bonus 10% Quality model its flight would determine winner rather extra bonus points additional engines recognized beginning bonus system would probably need some fine-tuning later date make workable will very likely additional changes made bonus system next year example proposal has already made brought vote 1987 ClAM meet ing would eliminate bonus bi planes An exception made pre-1920 bi planes undercambered wing airfoils would awarded 5% bonus Aircraft three wings would receive additional 10% proposal would also eliminate bonus retractable landing gears give 5% bonus conveational twowheel landing gears either retractable fixed no bonus tricycle monowheel gears effect proposal would reduce maximum bonus 15% total multi-engined model having two-wheel land ing gear actual difference between simple very complex models two-wheel gears reduced mere 10% Since simpler air craft can probably fly better its complex competitor approach nearly equal status impact latest suggested revision bonus system best shown compar ison between similar airplanes such Cliff Tacies Savoia-Marchetti SM-81 Hal Paren tis SM-79 Both trimotors Hals bomber has retracts Cliffs has fixed two-wheel gear competed head-to-head re cent Mint Julep contest Rough River Ken tucky Using present rules Hals retracts gave him 5% bonus edge captured first place Under projected change rules two alrplanes would have equal bonus advantage Cliff would have won small margin Actually both notable competitors have chosen airplanes well suited taking advantage bonus systembefore after changes trimotor rather twin provides assurance dead engine wont result disaster Multi-engines con ventional landing gear re tracts provide maximum bonus advantage though both models produced spe cifically FAI competition well suited AMA Sport Scale Scale Masterstype contests course lets forget Hals retracts valuable flight option can score highly vast difference between team selection process various nations US selection made year ad vance World Championship event modeler isnt obligated use same airplane flown team trials provides freedom improve entry Skip Mast has built entirely new Hercules Oslo Bri tain team selection held earlier same year Championship modeler must use same alrplaneand permitted change engines coming increase weight limit seven kilograms 1543 lb relaxation rule permit larger-displacement engines except single two-stroke engine FAI model now remarkably similar AMA Sport Scale airplane No measurements taken model judged distance hoping US Scale modelers will join us future FAI team selections After Paris meetIngs visited Scale en thusiast Hansruedi Zeller Switzerland Hansruedi member Swiss Scale team compete Oslo model deHavilland 88 Comet Mac Robertson Racer im pressed very large basement workshop numerous Scale models competition training fleet soaring gliders some electric power Hansruedi lives Thal densely-popu lated northeastern corner Switzerland Fly ing sites easy find keep because noise problems explains heavy emphasis soaring electric power Two-stroke engines really banned power source little use because poor public relations create Power mod els use mostly four-stroke silencers electrically-driven Flying sites obtained individual initia 46 Model Aviation Switzerlands Heimut Ziegler Electric Scale enthusiast 9-ft-span Farman 60 Goliath airliner ll France powered pair Keller motors Truly fabulousi Jerry Millers fine Waco YMF-5 CL built Pica kit An Enya 1 20R four-stroker powers 157-lb ship Finish acrylic enamel over Worldtex fabric top airplanes recent Mint Julep Scale meet Tom Czikks Douglas SBD-3 Dauntless built Bob Hoiman plans Above Craft weighs 135 lb has OS 90 two-stroke power Rom retracts Finish resin fiberglass cloth under acrylic iacquer Bomb releases vertical dive Digital LCD tachometer has dual scale lOX-bOX stable RPM readout Full scale voltmeter can used check/cycle TXIRX battery combos Reads load up 20 voltsand DC ammeter used check servo current Will find worn binding stalled servo conditions w/SCA1 Battery included 90 day warranty 4 Function ACCU-TACH $8995 ACCESSORIES OSAl -Quarter Scale Adapter ATi & AT2-500ma load 995 SCAb -Servo Current Adapter Airtronics Futaba Kraft 995 TLB1 -Voltage Probes.295 CC1 -Carrying Case will hold ACCU-TACH accessories.1295 Send check MO NorCal Avionics A-B Tech Inc 5689 Glasgow Troy MI 48098 313 828-8210 MI add 40/. tax Add $3 S&H See dealer fir tive Modelers dont beg national organi zation find flying sites mountain top flew Hansruedis electric soar ers actually farmers pasture will toler ate presence models land quiet local modelers have series hilltop locations available suit days wind conditions day flew wind directly up-slope folding prop needed first 10 15 second flight Flight duration unlimited total battery use about two minutes Its true soaring glider isnt best trainer Scale modeler controls too soft compared positive control accustomed have powered models However fellows have developed piloting skills equal other country Switzerland won team trophy Paris Scale World Championships 1984 noise-conscious countries Electric Scale becoming very popular Helmut Ziegler Swiss Scale ClAM representative has built flown very large about nine-ft span electric twin-engined biplane model Farman 60 Goliath airliner two Keller motors Soaring electric flight enjoy large following visited small town Untervax discovered has 20-member RC club visited hobby shop another village Grub almost exclusively devoted soaring-type models kits Flugmodellbau Bucher completely equipped produce kits fiberglass-epoxy fuselages series designs some Scale ASW 17 20 22 gliders US magazines inform us Electric way future Switzerland has already arrived Toledo saw electric Scale airplane past two years Continued page 142___________________________________________________ September 1986 47 Hetty5/32-in muslcwire encased bass wood struts landing gear Bobs new Douglas Mailpiane Functional shock struts areturned aluminum andthe springs either wound over mandrel lathe purchased local hardware store Basswood routed out music wire partially shaped glued Welbond RC-56 Wood final-finished later N r SOUTHERN PRO RETRACTS SERVOFormerly ACTUATEDPRO-LINE FORand RELIABILITYSOUTHERN RIC SEE YOUR DEALER DR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 73a-1 576 IF THE RADIO WORKS THE LANDING GEAR WORKS IF THE RADIO DOESNT WORK IT DOESNT MA TTER ESTeem frequencies interstitial RC frequencies. continues .this device approved FCC July 1985 though normal channels no intent no intent now will ever intent infringe frequencies used RC modeler Mr Vargo goes list long history AMA including posts Contest Director Past President Tn-City RC Modelers also included copy correspondence Carl Maroney Special Services Director AMA states ESTeem understand importance RC modeling individual community stand behind AMA its endeavors modeling society EST will cooperate way can mutual benefit safely sharing 1 Basic Construction Begirruers 107 Mm 4995 2 Basic Flight Training Beginners 65 Mm . 4495 3World Model Aviatton 90 Mm 5 4Oshkosh Onerniese 55 Mm 995 SAirplane Funnies 30 Mm 5 SUS Scale Masters 60 Mm 7Warhirds Action 75 Mn 95 SHedge Hoppin Vol 145 Mm 9Which WavisUp 70Mns % lOHedge Hoppin Vol 1140 Mn 5 Rental DeposIt Retail Price TapeK Rental Duration 7 Days After DeliveryK KPayment Chech 110 dansl M 0 Visa MC Card # & K K Eup Date Phone C C 0 D s Availahle hy PhoneK ShippIng 3 75 Foreign Canada Add 10of Total K K Others 15 IL Res Add 7% Tan -K- emyofAviationR&D PO Box 277 K Hazel Crest IL 60429 335-0776 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Skyhook/Api kos Continued page 42 wing trimmed flying creas ing hinge line wing tip ball-point pen crease can easily bend up trim tabs crack ing hinge About 1/16 positive trim tab should Youre ready go flying after quick spritz spray paint test sure brand doesnt attack foam along leading edge Release latch wanted latch super-simple quick easy build foolproof think setup comes pretty close see drawing inset plan Basically latch works releasing rubberband held place puslirod using extreme throw already-installed control servos used full up elevator servo allows gliders release relatively slow speed assuming youve dropped low throttle pulled up gentle stall use imagination release latch can used release drop launch host cargotruly sky hook RC Scale/Wischers Continued page 47 FAI Giant Scale subject Giant Scale World Championship brought before ClAM meeting Paris First inclinations downplay another RC event because proliferation added contests recent past Helicopter Pylon Soaring Scale Aero batics Electric RC events World Championship status another new event wasnt greeted great enthusiasm pointed out Dennis Thumpston Scale Committee chairman position losing Scale event now diminished interest Control Line Scale Giant Scale would replace Control Line would become International Contest rather World Championship Five na tions must compete two years maintaln Championship status has possible CL recently Finding five nations Giant Scale would easy matter Transporting Giant Scale alrplanes between continents across oceans may simple Modelers will need build alrplanes disassembled transpor tation small boxes insurmountable task done design stage Basic FAT rules state specifically must some limits placed dimensions weight power Australia offered set provisional rules Paris would need some modification fit within FAT established limits expect rules resubmitted 1987 Australian proposal followed present FAI Scale rules ex cept size weight absence com plexity bonus factor Now national aero clubs convinced Giant Scale just another passing fad would appear can become recognized championship event Strong struts Strength limited flexibility requirements landing gear new Douglas Mallplane Music wire struts look naked some sort covering Bass wood strips routed table saw pro vide snug fit A2-in music wire carved sanded streamlined shape bass strips glued music wire legs using either Wilhold RC-56 Weldbond ce ment Both adhesives have proper ties seeking type application remain slightly flexible after setting up impact rough landings will cause basswood shrouds peel away glues also bond well dissimilar materials Wood will shatter before slips wire final shaping sanding wood done after adhesive sets up about day two later Adhesive trapped inside struts Continued page 151 142 Model Aviation Americas alr waves Radio Technique/Myers What can say thank Mr Vargo Continued page 139information concern avoiding RFI RC channels hope other RF modem manufacturers will show much con cern avoiding interference RC channels \YIi2LJJLii Slowand EasytoFly irs PARACHUTE ITS ULTRAUGH1 ITS Great Camera plane Become aerial photographer pIctures camera mount Included remarkable windbag owes itt exceptional flying handling characteristics patented FlexifoilSoftwingThis aero foil shaped nylon envelope inflates air through leading edge moves forwardThe leading edge supported fiberglass spars mounted softwing beautifully made 12 squar foot wing does require finishing color already Colors Red Yellow Orange wing very strong virtually unbreakable yet will fold down fit pocket THERE CAN BE NO BETTER INTRODUCTION TO RADIO CONTROL wing mounted top king post Windbag has very low center gravity totaly self stabilizing virtually attitude soon realease controls will retum level flight stalled condition full up ne idle aircraft will sink almost vertically like parachute can used get out panic sitituation model will climb loop roll around chute can remove king post race air car can hold windbag pylon races large balloon wheelsfumished give great d clearence EASY TO BUILD EASY TO REPAIR windbag kit completeAII needed complete model engine 40 60 three chanel radio fuel tank has much success using new four stroke engines WIndbag 36 high 331/2 long 91/2from center engine shaft ground 24 between rear wheelsFuse 19 long wing 12 SqFL 2Ft 6Ft IEXXDN PO Box 420496 MIAMI FLORIDA 33242 PHONE 305 634 3630 RC ScalefWischers Continued page 142 will set up quite slowly shock struts solid aluminum bored Out accept spring Springs wound lathe over mandrel using back gears slowest speed support weight li-or 12-pound model calculated springs should have about 10 turns 046-in-diameter music wire hobby shop size 312-in outside diameter Extra turns close-wound spring ends length can adjusted compensate varia tions model weight small inaccura cies strut lengths extra turns can cut away small increments using Dremel grind er cutoff discs Tuf-Grind wheel word caution about large-diameter grinding wheels new largest diameter wheels impose quite load grinder motor Prolonged usage causes overheating can lead motor burnout smaller Dremel cutoff discs dont impose load vulnerable breakage due brittleness Choose own risk Wear safety glasses Tuf-Grind wheels worn smaller diameter risk overheating Dremel motor reduced Wood portion struts treated good filler sanded simulate ap pearance steel struts used prototype Hobbypoxys new Fast Fill does good job filling grain joints provide metal-like appearance Note rear struts bent inserted brass fittings lower end music wire threaded assembly nuts described July 86 column Weldon Smith advises threading job made much easier annealing wire end places wire vise used heat sink end threaded protruding heats wire red white heat lets cool slowly wire soft threading use landing gear shown photo will deflect due landing loads top end adjacent nut plates fasten models wing portion wire encased wood will bend great amount gear legs shrouded wood music wire would bend same point because stress concentrated due leverage Bob Dolly Wischer 5-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued page 49 stand 30cm above ground line motor third also about noise con clusion flight judge will independ ently score model in-flight noise level indicating model too noisy average very quiet majority judges score model too noisy flight score will penal ized 5 points counting judge ma jority judges score model very quiet flight score will receive five point bonus counting judge sound good especially theyre enforced several years Pattern wane days big contests seemed over gas crunch hit back 1979 contests folded lack entries several struggled along 20 entrants Now Im hearing reports 71 contest 60 another last contest Coonass Na tionals Lafayette LA hoping theyd get no 50 contestants because can have two flight lines flying site 51 would have managed 5 rounds weather hadnt balked during fifth round causing early end Pattern back Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Excessive elation photos local rubber modeler Fred Ewing Fred has long history Peanut FAC Flying Aces Club rubber participation excellent craftsman Being local convenient him attend last years Electric Fly spectator Being used quiet flying Fred immediately took interest Electric Never having flown RC before Fred start scratch Sometime during winter called described what thought wanted try Something easy fly flew slow sounded like Fred needed Playboy Since expert rubber modeler knew sticks excellent Old-Timer would no problem knew firsthand experience Leisure kit would fit flying needs So Fred got kit radio power system showed up field April Saturday morning Everything worked perfectly Straight off September 1986 151 Dealer Inquiries Invited