RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186
Edition: Model Aviation - 1993/07
Page Numbers: 100, 101, 103, 104, 105, 106, 130, 131
RADIO CONTROL SLOPE SOARING 'I U THIS MONTH am going dedicate entire column interview Joe Wurts slope racing fan think youll find some interesting ideas just may pertinent style flying stay tuned next column will return scale aerobatics funflying whole lot Now put some ballast lets go fast Joe Wurts tells about slope racing World Champs interview whole lot good thumbs soaring scene days recognized best F3B Soaring Mr Joseph Joe M Wurtsthe 199 1-92 F3B World Champion also Open class AMA Declared Distance Open Distance record holder RC Soaring impressive accomplishment 14067 miles neednt said Joes thumb certainly the finest have seen soaring may come surprise few pilotsbut really shouldntthat super RC Soaring pilot also avid slope soarer fact Joe has quite impressive list accomplishments area slope racing has won slope races including much-coveted International Slope Race California MidColumbia Cup Washington state Therefore month want share telephone interview recently master RC Soaring During interview Joe shares secrets success expounds piloting well building techniques others have employed enable lead pack slope race interview began placing call Joe him answering phone skosh small talk took place usual ya doing have flying lately move interview basic Wil Anybody whos anybody RC Soaring knows current F3B World Champion lot people know also slope racer So what us would like know became interested slope racing Joe got slope racing quite some time ago fact first slope race flew probably late 1970s started flying first myself flew about year half before knew organized clubs about time 15 tied club hosted contest about month month would thermal maybe Hand Launch slope race basically did everything would go slope race hosted maybe once twice year fly whatever I got slope racing enjoying racing finally figured out what took have good airplane racing really enjoyed just going out slope flying because way hosted races just much flying slope racing Wil What slope racing like Joe lot fly what first couple races flew polyhedral ship airfoil thin really low camber times camber 25% 3% wasnt fast airplane lot fun just going out playing maybe two three dedicated slope racers time Mike Bame real good slope racer Eppler 374 airfoil Wit typically what wing loading like Joe Some got extremely high remember Blame Rawdon flying Handgen high-aspect-ratio A/R design maybe 201 A/R airplane think well beyond FAI limit few times FAI wing-loading limit 2451 ounces per Airfoil month S-6061 Excellent slope racing aerobatic fun-flying Mike Bamberg shows oft Unlimited Class Slope Racer Notice large chord improve Reynolds number square foot think got up 30s couple times Wil What kind speeds turning Joe Thats hard say because dont know length courses going quite fast Some airplanes flown back would comparable intermediate airplanes flown today Wil I think people would interested aviation background have come understand airplanes technical side aviation What educational background Joe My educational background stated simply have bachelors degree aeronautical engineering masters degree engineering specializing aeronautical engineering Cal Poly located San Luis Obispo some strange coincidence has number good slopes located close would spend three four days week flying after school fact during school did slope flying during flying career 100 Model Aviation right author Joe Wurts Roy Lightie 1991 Mid-Columbia Cup Joe smiling because won $1000 race SIZEUSEPRICE 57X31159 6x21159 63X4395 65X292395 65X372395 65X503395 65X553395 65X603395 65 X653395 7x315159 7X415159 7X5159 7X6159 7X7159 7X8159 7X9159 7X10159 78X414395 78X66395 78X76395 8X735395 8X414179 8X5179 8X6179 8X7179 8X8179 8X9179 8X10179 9X416199 9X516199 9X6199 9X7199 APC PROPELLERS SIZEUSE PRICE 9X8199 9X9199 9X10199 925 X 50 .. 4395 925X525 4395 925 X 55 .. 4395 925 XS75 4395 925 X 60 .. 4395 95 X 6SN .. 5395 95 X 7ON .. S395 95 X 7SN .. S395 95 X 8ON .. S395 95 X 8SrJ .. S395 9X65 395 9X75 395 9X85 395 95 X45 29 10X3229 10x4229 1OXS229 10X6229 10X7229 10X8229 10X9229 lOXiO229 105X45 11395 11X3249 11X4249 11X5249 11X6249 11X7249 11X8249 SIZEUSE PRICE 11X9249 12X6289 12X7289 12X8289 11X1O7795 liXil7795 11X127795 11X12W7795 11X137795 11X147795 115X48289 1225 X 3758349 12X97795 12X9W7795 12X107795 12X1OW7795 12X117795 12X11N7795 12X1157795 12X127795 12X1257795 12X12N7795 12X137795 12X13N7795 12X147795 125X97795 12SX1O7795 125X117795 125X 1157795 125X127795 12SX 1257795 125X137795 SIZEUSE PRICE 13X6425 13X7425 13X8425 13X97795 13X107795 13X117795 13X13N9795 13X13SN.9795 135X971295 135 X1O71295 13SX115N 71295 135 X 125 10 1295 135 X 133 10. 1295 135 X 135 10. 1295 135 X 14 .. 10 . 1295 135 X 14W . 1295 14X5N1295 14X61295 14X81295 14X101295 14X121295 14X12N..10.1295 14X13101295 14X13N101295 14X135 101295 14X13SN.10.1295 14X14101295 14X14N101295 144X 105 10 1295 144 X 12 95 144X13 101295 145 X 14N . 10 . 1295 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material Continually Evolving Design nufactured Landing Products Knights LandIng 0 Dox 938 CA 98648 SIZEUSE PRICE 145 X 145N 10 95 15X8101295 15X10101295 15X11101295 15X12101295 16X81295 16X101295 16X121295 16X141295 16X161295 9X6PPusher 395 1OX6PPusher 395 1OX7P .. Pusher 395 1OX8P .. Pusher 395 11 X6P..Pusher 395 11 X7P..Pusher 395 14X6P..Pusher 1295 MULTI-BLADE 2 Replaceable Blades 18X82200 18X102200 18X12122200 18X142200 18X162200 18X182200 20X8122500 20X102500 20X122500 20X142500 20X162500 28X182500 SIZEUSE PRICE 20 X 202500 21 X 122500 22X83100 22X10133100 22X12133100 22X143100 22X163100 22X183100 22X203100 22X223100 24X103800 24X123800 24x143800 24X163800 24X183800 24 X 203800 24 X 223800 2 Blade Huh 18- 19 3000 2 Blude Huh 20- 21 3500 2 Blude Huh 22 . 4000 2 Blude Huh 24 . 6000 MULTI-BLADE 3 Replaceable Blades 17X103300 18X103300 19X113300 20X10133700 20X12133700 20X143700 21X103700 21X123700 SIZEUSE PRICE 22X104500 22X124500 22X144500 22X164500 24X105500 24X125500 24X145500 24X165500 3 Blade Huh 17-10 4500 3 Blade Huh 20-21 5500 3 Blade Hub 226500 3 Blade Huh 249000 CURRENT USAGES 1049 Free Flight 2luCombut 315-iSFylun 425 Pylon S4OPyIon e3eCembat 7US Putters CL Stunt 9120 Wurbird 10120 Puttern 1140 Free Flight 1225CC 1370CC 1421-25 Free Flight 1515 Free Flight ie29 Free Fliuhi act local hobby dealer first doesnt have what need order direct England Enterprises 916-661-6515 went aeronautical engineering because hobby very interested aviation particularly model aviation So decided go out become aeronautical engineer Wil Where has education taken now Joe I work design engineer aircrafi conceptual design Lockheed Aerospace Wi Joe youve won World Champs fly slope lot So have idea airfoils good both F3B slope racing Can tell us go out build new airplane today what would pick winning airfoil fact could tell us four airfoils among best Joe Oh good question triedand-true airfoils seem best four airfoils would pick no particular order SD-7003 very good perform er both straight line turns 2055 primarily because its straight-line performance am bit unsure its turn performance RG-15 just because encompasses full range soaring light air slope racing heavy air slope racing old sentimental favorite 374 Wil Youre saying 374 senti mental favorite stock E-374 Joe Yes Wil Okay thats great Joe someone wants get slope racing needs have some idea what size model buy build So need know what purchase whether will racing intermediate unlimited decide what best Can give us some ideas Joe Ah What rules drive maximum performance Unlimited racing airplane meets 11 pounds maximum surface loading drives model have about 65 square feet wing area plus horizontal tail area will push model little over seven square feet wing area about 72 square feet maximum surface loading model weight 11 pounds Anything smaller model giving up performance because Reynolds reduced same wing loading [This say chord will shorten because area reduced WB] Wi This tells span model must somewhere between 110 120 inches right Joe Right What flying F3B seems pretty good compromise slope racing 112- 114-inch-span model seems Co just about right slope racing well F3B Wit Is distinct advantage greater spanned airplane over shorter span Understandably longer span will have higher aspect ratio may suffer somewhat roll rate What feeling about design relationship Joe Models such Nova RnR shorter spans good racers lift strong soon air starts getting soft light airplanes have little bit span can fly little efficiently low flight speeds can win Thus shorter spanned airplanes definite disadvantage lighter air Wit Wind speed plays big part slope racing What wind speed think makes racing fun allows very competitive race Joe I like range 10 20 mph Wil [Surprised] Joe Yeah because makes race fliers race opinion wind speeds above start getting extreme flying Its fun starts put too much premium nailing turns starts increase likelihood midair collisions because cant scan air ahead much because model moving fast Therefore pilot does have time look ahead see what opposing traffic Wit How think thermals affect pilots racing style outcome particular race example coastal site air can much dense less thermal activity inland site can something quite Continued page 103 July 1993 101 VINYLWRITE CUSTOM LEITERING Providing elegant time saving economical finishing touch modelers U TO APPLY Our lettering comes prespaced aligned-saving hours cutting fuss aligning individual letters decal text custom computer cut 3M premium cast vinyl 2 mils thin24 colors 15 typestylesinc MilitaryBlock1/4to 12 higheStencil Mask color outliningas well stars symbols & much pricea can esaily affordli hT ME LOUSE YOUR WORK VINYLWRITE CUSTOM LElTERING 16043 Tulaa Street Granada 111118 CA 91344 818 363-7131 1MM 4PM Pacific Mon thru Thur F mple AMA e 1/2 high $150 1 high $250 2 high $350 P&H CA res add tax Call ite complete info pack & sample ITS FREE Custom Letter Today VINYLWRIIE Way MAIL ORDER ONLY Madison WI 53714 Tel [608] 249-4480 has added both foam Vought F-4U Corsair Mitsubishi A-6M Zero scratch builder Gus Morfis 4709 Green Meadows Ave Torrance CA 90505 Tel [310] 378-5679 has released new 1/12 scale plans Hawker Hurricane Republic P-47D bubbletop littleknown Ryan Fireball Making job scratch-building easier foam wing cores vacufonned accessories some Guss designs can now obtained Bump Hobbies PO Box 1140 Chadron NE 69337 Tel [308] 432-4383 Mark Panos 8489 South 2975 West West Jordan UT 84088 Tel [801] 968-2944 Write call information availability Going step further RC Research Designs PO Box 2551 Liverpool NY 13089 Tel [315] 652-3710 now kitting two Morfis designs Grumman F-8F Lavochkin La-517 plans limited production runs other designs future Some other good sources plans 704 fliers include Ponds Old Time Plan Service PO Box 90310 San Jose CA 95109 Verivoli-Tom Thumb 5726 Case Ave North Hollywood CA 91601 704 fliers like show colors Precision Aero 1561 River Highlands Dr Oconomowoc WI 53066 Tel [414] 567-5341 makers Wild Thing kit have added RTW ready-to-wear RC Combat T-shirt product line received picture showing Combat 20 produced Lynchs Hangar 1050 Faust Dr Caro MI 48723 Tel [517] 673-7116 chance meet Vic Lynch local swap shop notes considerable interest has generated liffle kit Although has square plastic-tube look some heavier designs construction all-balsa easily builds under 225 pounds Well thats aow up-to-date information 704 events sure check contest calendar month magazine write address given beginning column Until next timeremember check your6 lope SoaringlByers Continued page 101 different think should affect pilots strategy Joe The strategy always similar energy can build model climbing better off some strategy involved looking thermal use thermal sky out before start should use energy wisely personal opinion thermal up above 500 feet shouldnt use up during start dive use up altitude model has gained during start model will going extreme speed will fore bleed off speed quite rapidly So probably want model enter some fairly high altitude use energy during first couple laps worry about inland site thermals present person launches first can get thermal start climbing first resulting higher start altitude Also thing about thermals present racecourse tend make F3F format something crapshoot Wil Interesting So race strategy try get somewhere above 500 feet save energy first few laps race right Joe Id say foot climb above 500 feet will enter race course much above 500 feet Wil Lets grins sake say wind blowing optimum wind speed 20 mph know add ballast add ballast Wouldnt say part art slope racing Joe [Laughing] definitely some deep dark secrets add ballast dependent both amount lift length course simulations have run slope racing show kind cliff course length 500 feet course length below 500 feet no ....From AT4tO Zom weve got th plan ONE PROP lUJO PROPS OR NO PROPS YOUR CHOICE FLIGIfr PHOTOS O MODELS IlluStrated Catalog $200 sent no charge plans order PRICES INCLUDE UPS SHIPPING CHARGES Fiberglass Components Canopies Available 8-25 Mitchell101 Ju-87BStuka100 DC-31C-47140 F4U Corsair93 PT-17 Stearman77 P-40 Warhawk94 AT-6/SNJ Texan 101 F8F Bearcat86 A6M5Zero91 Fokker Dr 1 Triplane . 63 Mew Gull100 Taube semi-scale . 88 Beech D-18/C-45 . 114 P-51D Mustang100 P-47 Thunderbolt .. 72 F9F Panther72 NICK ZIROLI 29 EDGAR DRIVE SMIThTOWN N Y 11787 ph 5162345038 July1993 103 $3800 3200 4200 3200 2700 3200 3200 3200 3200 2700 4000 3200 2500 3400 00 FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores ds off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro, first time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips ructions include cutting first wing making templates old Bow 40 52 Available Power supply required o Guaranteed out perform rest Simply best TEKOA THE CENTER OF DESIGN 3219 CANYON LAKE DRIVE HOLLYWOOD 90065 FEATHER CUT $14950 S & H THERMAL GENERATOR Power Supply $11950 S&H B&P Associates Gives Total Fligbt Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 matter much wind shouldnt ballast up above certain value value depending upon aspect ratio airplane between 16 19 ounces per square foot number gets lower course shortens length step above course length 500 feet model can fly climb heavy enough course long especially like course 700 feet want load model just barely climbs time race model flying near its best L/D optimum lift-to-drag ratio speed Wil That interesting since would think short course would want model carry much energy possible through turns would want ballast model beyond certain wing loading Joe On short course models energy loss turns model carrying lot weight actually increases time model spends turns truly theoretical individual will say model loses same amount height turns no matter what weighs fact matter model real heavy spends time turns lighter model can turn inside heavier model Therefore though lighter model slower straights can gain time turns loses down straights Wil Since models carry four five pounds lead wings construc tion quality big concern because construction important cost model strong enough withstand g forces associated racing areby modelers standardshigh As result would-be racers have shied away competitive racing question can individual build model competitive keep costs down Joe The airplanes used race before got F3B probably $60 worth materials ready-to-fly counting radio course reason possible slope racing weight big issue So model could entirely constructed out fiberglass doesnt need exotics such carbon fiber Kevlar structure required baild racer vacuum-bag up couple layers sixounce unidirectional fiberglass surface layer [This would light cloth such 6 ounces per square yard help reduce pinholes WB] will have wing strong enough withstand 11pound weight stresses no problem Wil So affordable alternatives race enthusiasts advantage all-molded airplane Joe The advantage all-molded airplane F3B strength-toweight ratio repeatability guy 104 Model Aviation BEGINNERS hobby loses about half its potential fliers because fail successfully solo IT ISNT THEIR FAULT ITS THE PLANES FAULT lust some advertised trainers impossible average beginner solo seems norm crash rain 4 orb planes before becoming successful both stupid costly mention real turn-off new student quite unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensive trainer flighttesting ever conducted hobby can now know advance ones fly slow handsoff stable easy enough Grandma lust so-so intermediate ones deserve trainer label Send $350 plus 52f postage EASE-OF-FLYING RATINGS OF R/C TRAINERS Over 40 currently available train ers evaluated including ARFs Also grades easeof-building explains trainer aerodynamics dares address questions poor trainers good trainers marketed does no warn about Guarantee money back say eye-opening candid enlight ening time-saving money-saving frustrationsparing R/C publication have ever read send cnerk money order Jim Waterman 3818 Geerfield San Antonio TX 78218 Jpu\ llL LT LJL I-ILLr oBRASS HARDWARE eLID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHAROABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16x 16x 1Ch Send Check Money Order $16995 0 Shipping & Handling k NORTHWEST HOBBY TECHNOLOGIES 322 E St SE rn WA 98002 206 939-0884 building airplane garage can get airplane functionally just about clean molded airplane vacuumbaggingif understands knows finish off airplane nice thing about molded airplane shows up doorstep proper finish dont have spend man-hours necessary bagged wing get proper finish Wil So very repeatable Joe Thats big seller molded air plane single comes out perfect can go out bagged airplane will quite well slope racing Wil How important caller team winning races Joe You have have knowledgeable caller Historically have either used Darrell Perkins wife Jan winning combination have have built-in trust caller need understand what caller doing because caller will calling turns calling traffic judging what happening course So yes caller can very important Wil Do prefer lights flaggers indicating system signaling turns Joe I definitely like concept lights much better flagging gets trouble sometimes because flagger can also anticipate turn moving forward model approaches experienced racer will turn movement So call flagger moved did drop flag result may unnecessary turn cut pilot penalized light signaling method nothing given away until turn judge pushes button lighting turn signal light Wil How practice upcoming race Joe I used try get site day early sol could learn groove hill Different hills have different fastest grooves So can get hill early can learn groove what works best Wil What other techniques practice race site Joe Probably biggest reason get site early determine what will work best terms ballast dial airplane Wil Are using computer radio have two separate settingsone climb race speed Joe Yes have using Vision have mostly switched over Infinity 1000 use standard neutral setup launch climbing maybe just bit camber find thermal want climb also set up typical aileron-rudder mixing However time go fast flick speed mode takes out almost aileron-rudder mix mode also may reflex airfoil just bit change amount T F R N E D E 4000 different22000 3view drawings color FOTO-PAAKSIncluding kOkU-FAN Antiques Military Civilian Helicopters Sailpianes Catalog/Guide $500Overseas $1000 tUAL1TY ThTEGRITY SERVICE QJL&UTY IWTEGRITY SERVICE QJJALTr INTEGRITY SERVICE S 0AFTED GRrrySER VICE 5 395 O-AValIeyBIvd WALNUTCA91789N 9095941471 U WA T PE RR 00 F -C C WRITE FOR Seven models available weigh both gins & ozs High accuracy guaranteed tare have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $24750 Include AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court La Verne CA 91750 909 599-3348 C ni C -4 CALL ORFREE BROCHURE GATOR TRANSMITFER CASE feather lite GLASS CLOTH 7 ox/sq yd weight close weave makes glass cloth easy filling extremely light finished weighl Big 3 sq yd package detailed Instructions $895 SOFr-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommets Engine always safety retained Vesy effective vibration reduction dramatic decrease engine shake Available vesy light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-Safe 120 beam mount complete.S2995 SSoftNSafe 60 beam mount complete..$2495 *SoftN&fe 60 radial mount complete..$1295 Repiacement grommets 120 mount.A/495 Replacement grommets 60 mount 5 RADIAL ISO-MOUNTS 4b Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmisslon airframe reduced engine shake *60 Radial Iso-mount complete mounL.41495 *Imousth Pkg four $ 995 5/8 dis x 1/2 long 8-32 female end 8-32 x 1/2 male other end 60 Duro rubber elevator-to-camber mix Wil So using elevator-to-camber mix accelerate turns Joe Yes definitely best way get best energy retention airplane get bang buck Wil You dont feel flapping airplane slows down turns Joe It efficient solution making airplane turn fast going high C1 [coefficient lift] model will need operate turns addition full-span camber will shift drag bucket airfoil up airfoil still operating its efficient drag bucket higher C1 Wil How much camber need get turn efficiency Joe Probably about 50 camber will suffice thing think about running really windy day may want add little elevator-to-camber mix because pushing airplane high speeds going load trailing edge surfaces As result model may have much camber air did sitting ground because will get what call blow back can decamber trailing edge Wil brings mind another question airloads can decamber trailing edge can certainly stall servos last racer using JR 3021 servos put out approximately 44 ounceinches What like way servo torque race model Joe dont really look what torque specific servo Rather am looking servo will deflect under load have very happy perfor mance Airtronics 141 servos Wil Another question plagues would-be racers relationship between span aspect ratio chord Reynolds number ability turn model Since parameters interrelated what seems winning combination Joe Well have look full range flying conditions air very light high A/R model will win out time time gets really windy other hand almost doesnt matter what A/R model flying within limits course So model having A/R between eight 15 almost no difference airplane performance terms elapsed time feel still slightly biased towards higher A/R really isnt much difference Wil How much interest seeing area now slope racing Joe lot interest California California Slope Racers CSR have generated quite bit interest So number people starting show up club races Wil number fliers just plain intimidated 11-pound racers question twofold possibility creating Limited class class models limited say 60% 5kg weight wing loading limit might attract racers prepare transition Unlimited racing what think can done area attract new racers Joe What have seen really attracts racers limited-span races races span limited some value Currently races being hosted Torrey Pines crowd 60-inch class races attracting racers have never raced before things seems attracting indivi duals race class low cost involved purchasing 60-size model Wil What kind model flying class Joe comes mind Renegade Charlie Richardson conventional design RG- 15 airfoil its very competitive others out too Wil Great Well what about buying Unlimited racer pilot ready level racing Specifically what few models come mind really worth buying will competitive Joe Any world-class F3B model will certain ly job RG-15 Eagle 7003 Eagle Flite Lite Composites good choices all-molded Modi Models airplane would raceable well RnR Models produces Nova inexpensive way enter slope racing personal recommendation get Absolute Racer RnRtheir F3B airplane bit pricey buying design will get airplane can fly wider range conditions competitively unfortunately pretty much covers everything available US Wil What think four-man format versus two-man format Joe Well four-man very exciting very adrenaline pumping however quite risky airplanes lot fun have four really competent pilots airplanes course together will fly tight formations However soon get variable airplanes pilot skills models get spread out course potential midairs goes up exponentially Wil regard midairs seems considerably less likely two four good pilots flying pilots lesser skill So avoid midairs Joe true good fliers have fewer midairs Part avoiding midair collisions picking right caller Id say two-thirds information pilot looking caller involves traffic Continued page 130 106 Model Aviation rdy high-density molded plastic Cushions impact resists weather Strong double hinges durable latch Convolisted foam liner Great storing spare tranamittera New low priee..$l495 Include $350/Item S&H*FL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pemacola FL 32514 Phone 904 494-0203 * Fax 904 494-0207 ON DISPLAY ORLANDO FL AIRPORT ORLANDO RC Slope SoaringlByors Continued page 106 caller should looking ahead model Im busy flying clearing air telling other models relative will also telling need fly model avoid other model traffic Wil Joe have flown slope races number sites West Coast So what some favorite sites racing Joe The sentimental favorite has got Big Creek Lumber just north Davenport California hill learned highly com petitive slope racing has deep groove fun fly second slope would Eagle Butte Richland Washington big open has thermalswhich make real happy guy Also extremely smooth landing high winds raced super-neat could fly two feet above lip hill 55 mph winds raced get buffeted about too much turbulence really nice feature slope third site would have Torrey Pines because sheer vertical face hill Wil You touched subject ex tremely important landing As have seen landings can quite turbulent often result fliers smash ing models during first couple rounds thus ending race good fliers What style landing slow model can landed remain flyable duration race Joe Each slope has its own character landing example Eagle Butte very good breaking airplanes because doesnt have much rotor much turbulence way Big Creek situated forces pilot guide model down length rotor So guiding model through lot chop site like Big Creek desire airplane good glide path control want airplane set up similar F3B model can get flaps come down 900 ailerons come up bit will assure good glide path control yet retain good roll control same time adding drag landing must point out first few years raced flew three-channel airplane just learned manage energy well Id like make point racers fly model leaded up during practice go contest put four-pound chunk lead airplane go through stress flying race relieved finished race may have won racebeen overjoyed about win come land model loaded up lead familiar lands loaded break airplane Wil Who hot rods beat right now 130 Model Aviation 4 VIIEOS FREE #1792 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hra.$1995 WWI AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hrs.S1995 #1 592 WORLDSCALECIiAMPSAMAINVTLSHOOT OUT W INTL SCALEMASTERS 2 Hrs.S1995 #14 92 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hrs.S1996 Sandits 1 OClock E-Z Rut WWII P-3R P-4U Now 4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyingit Kit includes full-sized patterns complete Instructions colt rih,t, Iit B i i iii si #13 92 Tsp Gun Insitul oledo Model topo Weeki Air Museum2 Hrs 5 #12 91 scalemasiers Las Vegas 91 Q5AA. Las Vegai 2 Hrs.$1995 fl 91 NWIntI Scalemaiter Aircrafi Preview MIg Visitw/Dan Pirsuns 91 NW Seaplane Esampi 2 llr.S1995 ZiO 91 Top Gun W Palm Bch R 5AA Las Vegas W 0Msdel txps2 Hra.S1995 z 99 Scalemisiers Champs Irving TX hidhey lii 4 Scalemasiers an Oiegs Aerospace Mus 2 Hm. $1995 99 NW Intl Scalemasiers Farnagul Pirk-Aihol ID m thamplin Fighter Miieum w/Lsu Procior W seaplane champs Santa Monica Mis ol Flying 2 ldm.S1995 90 Tsp Gun Innitalisnal Mesa AZ W Model 1tsps2Hrs.$1996 #6 89 Scalemaniers champs si Loils ake Hanass m Schneider cip Races2 Hn.$1996 eg US Nails Scale & Seaplanes 89 NW 5eaplane ps Planes xl Fame tail Mu tAAMii Oshkssh Visit mw/Ralph Beck ago Mi si Sd & lid2 Hra.$1995 #4 -89 Tsp Gun Champi Coral Springs FL tsr Albainsi OVA Preniew ails Seaplane NW il Scalemasiers ior N-il Test Flight2 Hrs. $1995 U Special Edition PIecle Enfrizas Albatros OVA Brief Constr Engine Radio lnstaii& real Flights -2 Hr SIB 95 Cuflisa JN4II lenny Pisaw- FUN SCALE 100 inches 1804 ig 11 hi 8 sheets wlinitractisni $1996 10807 SE STACY CT PORTLAND OR p7266 PHONE 503 653-2578 503678-1342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WAflTIRNA VIC 3152 AUSTRALIA e 038013699 03-887-3472 BETA F-86F-16T-33F-4 Maverick Viper Aggressor necessary accessories call appointment FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 410 POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SASE FOR FLOAT OR OIL LITERATURc KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NJ 07066 1lea $400 P & H MO Res add 60/n sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sorinotield MO 65808 Rubber & Engine Power Free Flight Display Control Une Electric Power RIC Airplenee new illusiratecl 32 page tabloid size ceselog US b Canada 8100 Foreigh $300 Penn Valley Hobby Center 837-A W Main Sn Lansdale PA 19446 215- 3680770 S35 KULPRIT SPORT OR COMBAT WLNG KiTS 17 *00PRODUCTS 318 7475331 u103 LAVONNE OOSAIEO COY New Kits 1993 Viper sleek new design outstanding maneuverability stability track like arrow Viper 40 plus size engines motors emphasis proper construction minimize flying weight optimize performance design utilizes fully symmetrical tapered airfoil has ample room retracts fuselage can easily hold power batteries required electric flight desired VIPER Wingspan 60 Wing Area 620 sq Airfoil symmetrical #DS 016 basic kit kit features formed landing gear complete hardware package canopy selected die machine cut balsa plywood spruce hardwood parts Also included complete fuilsize rolled plans photo illustrated instruction manual new high performance sailplane designed electric powered flight new two meter span Vengence can launch speck size less minute 075 Hyperthrust II motor seven cells kit has designed rudder elevator motor operation utilizes fuselage designed large enough accommodate 12 cell 1200 mAh larger packs including taller cell batteries design also includes hatch bottom facilitate power battery interchangeability wing removal Carefully selected die machine cut balsa plywood spruce parts supplied Also included complete hardware package plus detailed complete full-size rolled plans photo illustrated instruction manual #DS 015 basic kit #DS 015F basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors propeller adaptor 1/4 spinner Sonic-Tronics 8/4 folding prop #DS 015G basic kit plus 075 Hyperthrust II motor fused switch harness arc suppressing capacitors geared reduced drive propeller adaptor 1/4 spinner Windsor 12/8 folding propeller Joe I hate put want beat Wil Who good fliers Joe Thats better would rather question Whom like race like competitive race Number list far away Darrell Perkins Darrell pushes like nobody else also number traditional fliers like Rich Spicer Rich Tiltman have around quite Gavin Botha up-and-coming good slope racer Imrose Cahn seems getting quite good down southland Thomas Pilz Ray Koontz too forgot about Ron Vann Flite Lite Composites Mark Allenboth quite competitive slope racers list could go seems like what happening slope racing now some really good thumbs out have right airplanes So some people handicapping themselves flying same old airplanes just dont have top-end performance Wil The last question list Will attending Mid-Columbia Cup 93 think new twoman format will attract racers Joe Im planning attending Cup no doubt am going make effort make like format two-man races based percentage perfect round However am pushing round scores rather both round heat scores percentage perfect So Im pushing 1000-point rounds Wil Well Joe will have wait see think new race format good Pro-Am Slope Racers Unlimited looking forward putting race racers like yourself Thanks much candid interview hope enjoyed interview Joe super nice fellow well gracious competitor Joe also knows wring ounce speed out modelsin slope race obviously F3B Airfoil month months airfoil S-6061 section discussed last month relative its thinner cousin S-6062 section 9% thick should excellent choice slope racing acrobatic fun ship should have excellent turning qualities able carry full load ballast Also because thicker 6061 will easier build structurally Give try let know what think 1993 131 2 ~iI0jQ VENGENCE Wingspan 785 Wing Area 635 sq Airfoil S 3021 IPAVEY YSTEMS 4 oRPORATION 675 Tower Lane West Chester PA 19380 215 430-8645 Fax 215 430-0186