ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS
Edition: Model Aviation - 1978/07
Page Numbers: 38, 39, 40, 41, 99, 100, 101, 102
ili WOKE light nap start body said its 2 am go back sleep sun outside window said broad daylight get up lazy am Oh yea KLM flight 67 going Denmark Theres Try Aker sketching Wakefield de signs pass time Bill Bogart looking out window shock waves 747 wing Thus started pattern confusion would last several weeks way Roskilde Denmark watch Russians fly A/2 glider 1977 Free Flight World Champs Rus sians contest results prove best glider fliers world devel oped techniques use circle-tow zoom-launch hoped improve own flying observing closely mind have picture Rus sian North Korean tables World Champs banquet Both loaded tro phies Several years ago Russians traveled North Korea teach model ing Id say get high marks teach ers basic entry fee World Champs paid use contest room board entitles compete win hoped learn enough master teachers future 38 Model Aviation hi * Top Ex-world champion Victor Chop No 24 ship During test session Russian fliers ran after models retrieve themas far 900 meters 1- 1-1/2-mm flights wind Above 1 Center section Chops model heavy spruce reenforcement bending strength Rubberbands across roots held wings wires during zoom-launch stresses Above R Chops model showing auto rudder pop-up stabilizer Russians excel A-2 Glider competition find answers Jim Wilson went 1977 World Championships Roskilde Denmark watch talk analyze move flight Whatever interest fascinating account recommended reading Top Veteran Russian fliers ignored circus-like atmosphere Roskilde competition timer hassling Andres Lepp before 7th round Fortunately Lepp did have common language Middle 1 Lepp No 28 model during quiet moment practice session Middle R Reenforcement Lepps center-section appeared have done after original construction Holes pod towhook adjustment Above 1 Lepps box held four models plus everything needed fly repair stuff jobl During home training member team made 1000 practice flights under simulated conditions July1978 39 World Champs Three Russian glider fliers came years 1977 contest four could have com peted Victor Chop defending World Champ explained foreign currency wasnt available other travel As 13 Soviets made trip eight fliers power flier Eugeny Virbitski reported illhis ships proxied third place interpreter team manager three political advisors About fliers Andres Lepp cool confident Estonian Tallinn Soviet wore outfit other standard blue sweat uniform brown-and-yellow ripstop nylon An dres Lepp FIA jacket PIK-20 cap Lepp has come close championship finishing top ten three previ ous world champs Young Victor Chop ROSKILDE AIRPORT TAXI C7 GRASS TAX GRAS L7 03 RUNWAY 400m1300m GRASS iL46 C4 C2115 WHEAT TAXI 200m 134 LC5 N PARKING FENCE 17 LCIIPOLE lOOm Flight IC16ILine AM WIND PM WIND NO25 N / BOMB CRATER POLE NO1 L2 Depression Hills CODE LAndresLepp CVictor IVictor Issoenko Chop Odessa defending world champ gives away nervousness chain smoking third flier Victor Issaenko Kharkov practiced team mates busi ness field turned life banquet party later dancing nonstop lady present three sea soned World class competitors Chop hav ing flown last two lssaenko last three Lepp last four World Cham pionships excellent athletes very slender hard Russians arrived Wednesday morning sixth July three con test days eighth ninth tenth glider being second event Some teams arrived earlier including own made best use time practic ing small fields near Holbeck Ring sted both about 25 km 15 miles school Viby stayed during contest past Russians have sometimes arrived very late before international con tests did practice practiced during available pe riod Roskilde Airport making about 60 flights five separate sessions followed two-week team practice near Moscow glider flier made 1000 flights concentrating light-air training flying lot midnight till 6 am Lepp said could expect make 220second flights neutral air result practice team usually relied bus trans portation provided Danes get around early practice sessions usually among last leave first day Wednesday sixth Roskilde Airport open model flying Russians first air regard l5-20-mph wind people watched Russians flew practice pattern consistent Take model out box assem ble some fiddling around wings due removable wing wires Fly model two three times make required trim changes close model box practice flying skills Train dont trim describes practices Russians comfortable various weather conditions quickly adjusted models best results got training After launch flier would watch zoom first glide circle run after model retrieve run brutal Wednesdays wind being anywhere 600-900 meters I te flight Its obvious fliers deluxe conditioning program repeat practice pattern over over Issaenko told runs five kilometers three miles day conditioning expect three fliers could handle training run 2 1-23 minutes opening Wednesday Russians showed what price willing pay ready contest Saturday Lepp 40 Model Aviation As photo tail configuration Issaenkos No 19 ship suggests Wilson Observed Russian models placed Consistent flight capability ahead sophisticated super designs crashed model spiraling launch second after DEing runway Chop planted ship tow right up leading edge got fly ing downwind enough slack al low circle continue didnt throw line would have saved ship kept running just would have contest wind just too much however Wednesday flier made about ten flights practiced kiting parking cir cles launches Parking circles small radius control wind surprisingly flat bank angle Circles started just giving slack towline little rake towhook no stall violent action required start circle Air speed circle up turn steady didnt hesi tate once started No auto-stab function used parking circles up high line werent deathdefying swoops wipe out wings Dur ing parking fliers stands sideways wind handles line Rather like making big loops U-Control ship launch zoom usually large-radius circle low bank angle Launches wind made rapidly taking two three arm lengths line unlatch turning model letting go line make smooth re lease three fliers used two-inch finger loop hold line 034 inch thick monofilament about 50-60 lb test line harder less stretchy inexpensive blue monofilament hard Stren brand favored Southern California live Thursday morning wind lower intermittent rain team out flying different ships Wed nesday end session trimmed practiced four planes brought three thermal ships layouts similar familiar ones already published ship span longer four ten inches aimed improved glide lower winds fliers would launch taking five six quick steps after ship turned wind stop running go through arm motions unlatch turn launch three used same technique few launches messed up average time turning ship wind launch under two seconds models being similar layout airfoils height gained launch differed air speed flier could gen erate running arm speed during launch sequence Lepp best zoomer observations could count 30-feet altitude gain launch Most launches made running backwards rather forward has advantage making launch timing easier since could see model during launch sequence Lepps legs appear Continued page 99 July1978 41 Victor Isasenko seems intently eyeballing alignment No 19 during its assembly team member made about 10 flights D-Day minus Onepracticing kiting parking circles launches Having adjusted models earlier concentrated training Pod lssaankos No 21 ship equipped radio locating transmitter 2-function timer OT Ship reduced zoom rudder offset prevent spirals Towhook published Aero Modeller Timer lssaenkos 90-in. No 23 fly-off model vertical scroll completely enclosed 20-mm thick pod pod layout similar Bob lssacsons Wishbone results have become available spoke prop unloading its benefit na ture benefit can made clear comparison two props identical size unloads latter al lows engine rpm increase cause operate engine below its maxi mum rpm Any increase rpm result additional horsepower can used turn larger prop bring en gine back down its Max/hp/rpm prop unloads obviously add ing aircrafts efficiency two propellers identical size un loads other can because propeller reaches higher rpm has less drag present work aims towards removing drag propel lers felt drag controls unload ing ability great extent work unloading engines props area greatest potential improved perfor mance Both horsepower curve engine thrust curve prop rise steeply maximum ap proached Any increase rpm top end can equal times rpm near low end Also should considered few mph increase midspeed range means nothing added what top becomes very important results current work excellent-size normal pro peller Formula scratch pro duced similar size lower drag pro peller using ideas article Most normal props will unload about 10% air rpm 20K ground can expect 22K air new lower-drag prop showed 25% pick up decided increase race course amounted nearly 10 seconds As can seen 15% increase put rpm ter minal velocity over Max/hp/rpm engine point weather curtailed flight testing until 1978 season ever larger props already fabricated ap pear have good potential bench tests Only flight will offer proof course question increase prop area diameter blade width Perhaps increasing pitch combination pitch area would prove best Some interesting experiments appear order s suggested reader refer Mr deBolts article Better Props Formula published May 1977 issue Glider Flying/Wilson continued page 41 end up around armpits can run backwards faster people can run forward would make pretty good NFL cornerback After Thursdays opening ceremonies weather best Danish stayclear skies buoyant air low wind would take models 400500 meters three minutes Practice same before fliers working air-picking launches Launches good zooms doubly rewarded Ros kildes light air elevating ships hotter part thermal better climb plus extra flight time due climb itself calm-air launch sequence same medium wind se quence Run five six quick strides after ship turns wind hand-over hand two three arm lengths quickly turn loose line release Friday Wakefield flown glider team helped downwind re trieval group After contest three Soviet fliers busiest practice getting about 20 flights time spent flying techniqueno trim ming Only eight hours before start contest other contestants packing resting Russians however out working hardest difference previous sessions longer span fly-off models inconsistent launches compared shorter span models Whether due design construction quirks particular models dont know During practices neither fliers nor team manager talked very much fliers worked own ships didnt pay much attention other countries competitors saw camera Lepps out short time flying fin ished left either eat go back rooms short pretty seri ous business model processing serious entire team showed up fore processing officially began Thurs day ran ships through no crowds around dont know arranged effective Saturday morning team out early made about five short flights warm up test air Field condi tions affected flying greatly air port surrounded grass areas crops forest Upwind launch line large depression upwind rough little hills irregular terrain temperature between 5565o F sun directly visible until late day Some strong thermals generated right after 7 am otherwise lift weak Most rounds thermals just strong enough maintain ships line height slow descent last round especially ten 82 fliers maxed air conditions dead map field shows general layout Initials L C refer Lepp Chop lssaenko launch point particular flight LI instance Lepps first-round launch point Rus sians mobile fliers field although majority fliers circle towing did get fairly spread out Russians have simple strategy get downwind back good selec tion other fliers wait air someone hand over thermal July1978 99 Designed 2 channel R/C tether control 15 35 engines Maintaining top quality simple con struction Balsa Plywood parts accurately diecui precision vacuum formed Plastic hull cabin Hardware package including R/C hardware Full sized Plans plus Decals Sport model Coast Guard version STERLING MODELS G ST PI411A PA 19134 no dealer availaSle d,ect odes accepted tO additiOeai cflage handling shipping leo minimum U S SI 25 ninirnun Outside US Catalog 01 entie line Ot airplane Control line Train kit boat ero Secet otUOdplAiplanet cowering tinisking ricing enclosed C Seces ot Contnl Line Ca,ie Flying snIping stunting Carrer ruleS eguletionn oontul line installation instroctinni 2SC er NO checks OnioUS moneourde orcorrenut competition strength execution park downwind patiently pick air care fully make consistent launches practice fundamentals until can instinctively execute condi tioning program has both long slow dis tance runs endurance interval workouts speed practice gymnas tics launch agility seasoned competitors have mental stability cope carnival-like atmosphere World Champs attention basics thorough preparation simi lar approach other international athletic events prepare win wind light below roughly 10 mph flier just straight tows downwind after initial towup half circle higher winds flier circles drifts downwind parking spot bonafide lift comes through will take forced time will go would prefer fly other sportsmen Victor saenko puts Two-thirds contest flights piggybacking third solo chart 21 Russian contest flights taken directly log writ ten flight occurred notes bit terse flavor competition Round 1350-450 hours 6-8-mph wind overcast sky 24 82 fliers maxed Lepp Wait four minutes after beginning round Park 200 meters downwind line Line tangle Swede crash Re turn line refly right away Park 300 meters downwind avoid crowd Piggy back single marker model came straight him Smaller diameter zoom circle practice Circles left Max Chop Go right after Lepp timed out Park 100 meters downwind line Let thermal go couldnt reach marker model Line tangle Recover make best zoom immediately May have planned tactic latest line tangle rule although air good Circles right Max Issaenko Park 100 meters downwind Birds nest line foul-up real mess Lepp Chop untangle Issaenko circles 30 meters line Excellent team work Finally launched himself tension Fluttered right tip panel Circles right Max Round 11455-540 hours 10-12-mph wind 29 of82 maxed Lepp Park right end line away crowd Kites some circles some turned down marked thermal Took second back-up zoom Stall launch quick one-bob recovery Air marked three other ships Fourteen-minute park before launch Max Chop Park 100 meters downwind right end line Team manager radio talk retrievers stayed fliers towed pointed out thermal chop chased marker mod els 400 meters crosswind Made three test circles before launching right wind Max Issaenko Kite park 100 meters downwind Piggyback single model Stally zoom big stally glide circle held altitude halfway through flight Max Round 111545-630 hours 8-JO-mph wind 35 of82 maxed Lepp Piggyback USAs Jim Walters line Made three test circles before making dynamite back-up zoom small radius again 200 meters upwind Jim finally launched Max Chop Changed models after breaking tip DT second round Park 200 meters downwind center line Went himself tension team manag ers back turned earned frown Easy max Issaenko Added glide turn between rounds Passed up two thermals first park went 300 meters straight down wind five moves chasing big couldnt quite catch up Held piggy backed two models zoom flat unstable thermal died Trim OK now ship made 103 Round IV635-720 hours 8-10-mph wind 45 of82 maxed Lepp Usual park test circle near rapidly climbing model pull down get slack test circle back-up zoom strong thermal Max Chop Crosswind move park air marked three models test circle Release definitely going up arc Max lssaenko 600-meter straight downwind sprint chasing biggest thermal day pulled out couldnt quite catch up Thus run outstanding athletic ef fort contest Five minutes park catching breath went himself after refusing two patches marked air Flat zoom Max Round V725-810 hours /2-15-mph wind 37 of82 maxed Lepp Crosswind immediately right side line piggyback single model Su per zoom Marker model came down Lepp rode lift Max Chop Two test circles park great boomer marked models wheeling around launch made 75 feet alti tude gain wound up higher marker models after half circle Chop stayed 200 meters line though six fliers back him Czech Ivan Horesji finished fourth 1975 took same thermal fluttered both main panels zoom cut down altitude thermal god intervened thermal petered out Ivan hung max Chop made 170 Issaenko Piggyback single model park Tested air about 100 meters marker moved crosswind tested air upwind marker model before going Max 0800 contest 70% complete Now fliers nine hours stew around before last two rounds timing added other World Champs pressures strange food languages crowd ed conditions reduce perform ances home field levels Round VI 1705-1800 hours 5-7-mph wind mostly overcast 24 of82 maxed Lepp Went 300 meters downwind im mediately avoid gaggle fliers Parked 15 minutes before going himself tension After about two minutes flight ship did two flat turns increas ing speed lost altitude before slowing recovering Max Chop Went thermal park missed pulled out third third next thermal Nice standard zoom Max Issaenko Fifteen-minute park dull gray period Finally went after two test circles good tension two other ships wheeling around climbing air weak ship sank crops 174 Round VII1805-1900 hours calming clearing JO of82 maxed Lepp Removed glide turn test flight far downwind heartbreaker after 12-minute park dead conditions Went himself after test circle Good zoom position sucked down crops downwind Lepps hole born Lepp flier make six consec utive maxes drop pushed him second place 164 Chop 800-meter downwind move control tower area looking lift around hot spot Dropped line once park ing recovered after great sprint Went himself finally orders team manager allow time Issaneko Smooth zoom no air 137 Issaenko Park left end line until nearly end round finally going himself what looked like good tension ship made several small circles top line crops got him also 172 Later Danes commented Round VII during time day sea land winds cancel another produce air little vertical motion Flight times certainly confirm arrived Denmark feeling Russians larger life no matter what did would some win Well arent didnt 100 ModelAviation ATTENTION RC DEALERS Order large stock Kraft radios ServosKraft EnginesAir barn unitsPlus accessories KRAFT SOUTHWESTERN INC PO 8068 Ft Worth TX 76112 817-451-7537 Night 429-3828 572-1452 OVER 280878 CA OGS SCALE DRAWN Ss oc OU~ 1I MORR SON TECH 48500 M KENZ E HWYV IJA OR 9 488 time excellent competitors air unstable try same things everyone does find lift out times down last round three around obvious hot spots looking lift couldnt con nect Racers luck applied everyone Russian competitive philos ophy need good dependable air planes ultimate glide performance ships above average structural design construction conventional aerodynamic design lssaenkos Chops developments Sokolov school early 1960s Lepps own layout dating back about ten years models have modified original concept make room cir cle-two apparatus zoom-launch flight requirements Wing center sections have beefy spars bending strength diagonals torsional rigidity mod els vary enough within conventional limits believe warp-free structures have flight perform ance design feature such keel effect low dihedral wing incidence relative some reference line Chops models similar layout Plovdiv winner has varied rib lay out working toward flutter-free reliable structures latest model #26 has features completely enclosed timer 18-mm thick machin ists dreamcarbon-fiber ultralight boom streamlined spring/magnesium stab tongue impressive trick saw model Champs lssaenko flew #19the same ship Plovdiv #23 fly-off ship inter esting some ideas Bob lsacc sons Wishbone years NFFS A/2 year also some same tricks Chop built lower construc tion standard real difference over World Champion Lepps models conventional comparison ships have few tricks towhooks same design has used least six years Its measure contribution sport count World Champ competitors used Lepp hook Chop Issaenko show some independence used similar sheetmetal towhooks published last year aileron two years ago has replaced timer-controlled rudder stop limits rudder deflection during zoom prevent spiral dives models equipped feature sometimes used sometimes didnt possibly depending expected wind speed during flight contacts Russians cor dial Orwellian During day political advisors around thing business evening after advisors went bed great parties flowed school halls Russians really can have great time drink vodka smallest excuse cant Now can have GloBee leadership performance growing family improved model products featuring -A PLUGS Prototypes immediately set new records Get least 1000 RPM greater power longer life replacing plug popular -A engine new GloBeeat competi tive prices Racing models have new high strength coil both Racing Sport plugs have patented spiral tip blowproof glass seal Change heads standard wrench B GLOW PLUGS Standard line Gb Bee glow plugs larger models put sting engine Spiral glow element leakproof seals equal hottest engines can buy Racing Racing2 RC Sport models available longs shorts C STINGER Cordless self-contained -A starter delivers over 100 starts full charge No external battery dan gling cords Rechargeable lead acid cells included will start crankiest engine 010 051 cid Shroud protects shaft bearings GloBee 45 VOC charger recommended handle straight shots Wild Turkey quite well So its matter both sides doing some adjusting sure fun getting adjusted evening free de tails hardware Especially after contest very willing take out models explain functions lssaenko spoke fairly good English Lepp spoke German communication easy three fliers showed off ships great pride just would similar situation us A/2 glider flying still can sim ple modeling its bestat local level World Class glider flying though stren uous sport sport played mind legs just like defensive basketball Russians organization D FIRE PLUG Integrated glow plug start ing system optimum power Rheostat control matches current weather fuel plug choice 0-10 amp ammeter dicates power output also shows plug burned out engine flooded GloBee 25 VDC charger recommended E CHARGERS Ask model dealer about special combination offers matching chargers25 VDC Fire Plug 45 VDC Stingerat big savings championship products world modelers . DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 practice have paid off state-support ed helps no night baseball TV take up time either think can beaten initiative pas sion Free flights greatest strength after contest success gQverned split-second decisions molded logic emotion What want win World Championship A/2 glider First must want win l bad Set goal winning World Championship flying crashing merely placing semi-finals just flying Champs winning Team members have taken contest seri ously have told price very high everything could possibly prepare number July1978 101 NEW 1/2-A plugs Join Team KITS PLANS SSORIES DAli ACE 17 SPAN STOCK NO PP IS KIT $425 WALNUT SCALE KITS BABY ACE$423 PEANUT SCALE KITS PIPSE J3 CUR$329 PSETENPOL$329 MILES$329 TURBULENT$329 MUSTANG$349 ZERO$349 COUGAR$349 ANDREASON$349 GIPSY MOTH$349 GANAGORIE$349 SPORT MODEL KITS ONE NITE 28$475 ONE NITE 16$349 STRINGLESS WONDER$249 PROC ROG$139 KITS 0 PLANS S ACCESSORIES REAL JAPANESE TISSUEPROPS COMPLETE CATALOG HARD TO PING ITEMS pP 0 BOX 2490 -AMA LA MESA CALIF 92041 PHONE 17141 469J675 6 may come up incomplete preparation certainly wont Youll need high goal resist urge build latest all-time high-lift special 27to-l aspect ratio whatever instead ordinary layout will make youre contest ready high goal re member flying decides contest cant anything competition until youve done prac ticemany times goal trip watch Russians fly learn worked far came back Denmark maxed out Taft semi finals doing some things hadnt done before Areas can improve comparison Russians field mobility zooms air-picking extreme conditionsdead calm high winds Hopefully article will fuel efforts solving problems have questions about write will try answer address 1030 Avenue D Redondo Beach Calif ornia 90277 Time Flies/Berliner continued page 49 conventional way building airplane airplane intended very high speed really far-sighted designers busily switching all-metal con struction first test hop Time Flies made October 1936 GeeBee plant Springfield MA Frank Hawks control claimed totally satisfied its performance plane has speed racer pract ticability rn transport plane Its smoothest swiftest sound est ship ever piloted view subse quent events tempted take words grain salt Calculations Howell Miller indicated streamlined white plane should have top speed 375 mph cruising speed 340 mph cruising range 1500 miles flurry record break ing seemed matter time Tests moving along well until January 1937 Hawks encountered first what long string problems landing gear Following flight claimed have hit 320 mph 4000 feet altitude found could lower landing gear fully bellied Rentschler Field Hartford CT damaging underside pro peller Upon inspection fur glove found wedged retraction mechanism early spring damage repaired tests proceeded well enough justify attempting first what hoped would public speed runs Hawks took off Washing ton DC 1030 morning April 3 1937 landed North Beach Airport just south what now LaGuardia Field NY just 48 minutes later Current flying time DC-9 equipped scheduled airlines 55-60 minutes Hawks ground speed close 270 mph against 30-mph headwind brought air speed 300 mph thing appeared ready bigger better things come Just 10 days later first major test Time Flies began Right after breakfast Hawks climbed white bullet set off Miami FL almost 1100 miles away Four hours 55 minutes later time lunch As soon pilot airplane re-fueled Hawks got back fired up north Four hours 21 minutes flying later came land Newark NJ ready complete announced goal breakfast Hart ford lunch Miami dinner New York flight south gone perfectly needing 1900 rpm Hawks claimed just 40% power average 220 mph return trip bit tougher headwinds crosswinds forcing him climb 15000 feet run 2000 rpm boosted speed 230 mph leg Only thing really went wrong landing Newark sort greenest rookies would try deny experienced Hawks touched down hard Time Flies bounced far back air came down again 200 feet further along runway its tail wobbling its wings fluttering according New York Times reporter still almost out control Hawks heard loud crack main wheels hit pavement third time managed get careening air plane stopped before ran out runway finally halted right wing hung limp Back hangar dis covered spar given way during hard-bouncing landing initial reaction pilots engineers scene spar faulty begin cold fact Time Flies broken airplane Strictly speaking Time Flies never again flew least under name nor its well known shape Shortly after disastrous landing Hawks announced retirement speed flying go work Gwinn Cowhich working bulbous little biplane supposed fool-proof Late 1937 Herman Wurster raised landplane speed record 380 mph prototype Messerschmitt 109s effectively put record beyond reach Time Flies could re built attempt During 1938 machine acquired Military Aircraft Co set out repair convert proto type pursuit plane obvious change replacement racingstyle flush canopy large green house made once super-sleek craft look like caricature Japanese torpedo bomber progress slow months nothing seemed happening August 1938 project suddenly back news August 23 Hawks took off Gwinn safety plane what supposed routine demonstration some potential inves tors tried go between some trees hit high tension lines crashed field Hawks passenger killed instantly almost exactly same time TnAmerican Aviation Inc bought Time Flies called Hawks Military Racer HM-l re-registered NX-2491 Hoping sell production version Chinese already deep war Japan Tn-American arranged have flown Cleveland Air Races pioneer Army pilot TAAs chief stockholder Leigh Wade good showing Cleveland might finally bring longsuffering airplane some commercial suc cess Wade though now 80 years old never theless has very clear memories brief romance ex-Time Flies went Springfield flew airplane down Hartford because little field big enough really safe land ings got ready run speed course taking off Pratt & Whitney airport couldnt get gear up came up part way couldnt get down ctric motor 102 Model Aviation FLY WITU g35R Ga 3 pGWER 0 WALMUT SCALE ASK FOR OUR KITS AND ACCESSORIES AT YOUR LOCAL SEALER IF NOT AVAILABLE AT YOUR DEALER ORDER DIRECT ADD 601 POSTAGE BROWN CO-2 ENGINES ENGINES ARE IN STOCK NEW CHARGER AND S SIZES OP TANKS EROWN ENGINES MUST RE ORDERED DIRECT FROM PECK-POLYMERS