Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia
Edition: Model Aviation - 1986/05
Page Numbers: 96, 97, 98, 99, 100, 101, 180
Beginning left page lethe flight sequence readyto launch designer/author Ken Willard shown first picture through first racing turn pylon last picture right page Second picture chow Dave Bridges launching model its ele mentthe wind sky photographer pan racer because its speed making Dave background blurred THIS DESIGN Unlimited class Slope Soaring Racing created win Though some qualified observers have opined some minor modificat ions would also competitive FAI F3B events dont know Iwant race Slope Racing exciting events RC model competition though well known typical heat involves four sleek racers speeding through air absolutely no engine noise speeds ranging 30 mph light winds well over 100 mph strong winds Add shot adrenalin pilots get being able hear spectators cheering have exhilaration everyone involved racers have exactly same power available themthe updraft cre ated wind blows up slope Theres no tweaking needle valve no carving away part prop blade no adding nitro racing fueljust wind carefully selecting flight path takes advantage currents some pilots get power out wind others about later new unfamiliar RC Sailplane Racing heres works first requirement naturally have hill site against wind blows ideal condition wind blowing perpendicular slope straight hillside though other angles will still create vector component against hill will provide lift wind strikes hill oblique angie result will have upwind leg down wind leg course happens timing turns will delicate demanding Ideally hill should present stretch 600 ft oncoming wind Although shorter courses around 400 ft can set up shorter course important racing design have fast roll rate turning radius longer course advantageous racer high straightaway speed courses over 600 ft make difficult pilot see turn far end reason 600 ft considered best compromise Staging Sailplane Slope Race takes considerable manpower planning Silent speed sometimes reaching over 100 mph RC Slope Soaring Racers amazing say least up four models course same time excitement just great Formula Pylon racing its winning counts design incorporates features prevent being also-ran EKen Willard 96 Model Aviation compared sharpness plane Next model begins climb out gaining speed Once settles model flown shown fourth photo fora qulcktrim check everything okay model Istaken through course low fast Finally see diving turn atthe far pylon Bud McCrarys airstrip pictureswere taken hasto beautiful sites inAmerica end course need four flagmen pylon judge start line need official starter finish judge communication system neces sary between pilots area far pylon line whip man needed get contestants upcoming races ready area weight man needed check weight racers against allowable maximum end raceor racer has jettisonable bal last before race pilot must have copilot pitman call turns him far end course Yes some tasks can per formed pilots competing immediate race can see much manpower needed Lets take lcok course shown schematic diagram Fig 1 Note flying done out front pylon aiming stakes fly around pylon past aiming line pylon Since turns made wind flight path Figure 8 can present problems two aircraft flying course going upwind other downwind Some guys like call demolition derby surprisingly enough midair collisions turn rather crossover point Sailboat race starts used can quite exciting minute before actual start race countdown begins aircraft can launched time prior 15 sec before start pilot orbits model wherever chooses order gain altitude countdown ends racers must behind start line Pilots events have developed numerous strategies techniques attempt get jump competition Some stay well back start line approach timed dive others get right above start line headed out away hill make diving turn line still others position models ahead high above line coming downwind Split-S start methods timing split second sort thing diving speeds right around 100 mph Flagmen pylon line critical success race has different flag has identified pitman specific racer race starts flagmen far turn hold up flags nose racer crosses sighting line flag dropped pitman calls Turn pilot Some skilled pilots can judge distance begin turn before flag drops thats right long racer goes past pylon line no part racer passes sighting line flagman waves cut pilot has fly extra lap usually results last-place finish race really close near pylon about 30 ft pilots box pilots execute near turn prompting Nonetheless flagmen operate same manner distant pylon pylon judge pylon can over rule flagman judgment cut has incorrectly called excitement race Another point flagman must wait until nose racer past sight line sooner though racer would have pass earlier turn execution would give unfair ad vantage Races can five eight 10 laps depending conditions Contest Directors decision end race May1986 97 icurea witn ien wiliara ana Nancy Lowe race-winning model winner International Design Award well Nancy president Magnum imports sponsor award An accomplished Sail plane pilot Nancy earned tenth place 1984 League Silent Flight Tournament must made Sailpianes going same direction start final turn made just before crossing finish line As might guess race has decided turn matrix Sailplane Slope Racing established same manner engine-powered Pylon Races wont go details except variation used International Slope Races second day usually some seeding done pilots top scores through luck draw have com peted against other purposely put races together balance out element luck Over years International Slope Races have set rule least four rounds flying must completed four rounds flown round may selected pilot dropped score provides some compensa tion bad luck midair collision finishing race because wind dropped others managed stay aloft Scoring pretty simple point first two second three third four fourth five DNF did finish six DNS did start lowest score winner ties flown off FM limits used English equiva lents means maximum total weight 11 lb maximum surface loading 24 ozIsq ft combined wing tail surface area Wind conditions can vary light wind typical competitive racer can barely remain aloft winds high 50 mph mind imperative racer competitive throughout complete spectrum wind conditions addition being able handle wide range wind conditions Sailplane Slope Racer has rugged enough take some rough landings keep going Most slope sites have smcoth stretch landing area wind blowing hard turbulence makes smooth landings difficult best go about designing racer meet conditions Its real chal lenge several ways go design Black Beauty came up Theoretically should meet requirements completely versatile racer race has written 1984 Interna U U e E U S 0 0 2 0 U tional Slope Races luck would have wind conditions such 20 50 mph its potential light-air perform ance demonstrated competition know however can stay aloft lightest winds Lets lcok some features design arrangement provides performance envelope required corporated wing use flaperon setup has effect created variable-camber capability relatively wide flaperons trimmed full trail set produce Eppler 182 airfoil excellent high speeds Positioning flaperon done using what normally throttle control Full throttle full throttle trim used establish 182 airfoil Drop throttle trim idle position slight reflex 182 section dropped essentially flat trail characteristic Eppler 180 section airfoil marginally slower 182 has wider drag bucket will turn abit sharper corresponding drop speed Both Eppler sections fast light winds have problem maintaining sufficient lift keep relatively heavy racer aloft Dropping flaperon bit Left Removing hatch equipment section fuselage revsaisthe elevator servo receiver batteryunder foam padding nose weights balance Right Ballast compartment some lead sheets used Model can carry 3 lb internally Note -in bolts wIng nutswhlch aiiowqulck easychanging ballastas needed Whitetube containathe Rxantenna runs Inside tothe tall 98 Model Aviation flex-rod connector elevator horn runs up leading edge fin tothetop over T-tail fin/stabilizer setup ThesildingservotraysetupAsshown servo way backto shape aIrfoil minimum lift/drag max speed Sliding servo tray forward extends flaps down position forextra lift wind diesor slow gentle landings 600START/ FINISH ii2_-_ _ /___________ AIMING STAKES PYLON JUDGE however creates undercambered section similar NACA 6709not too fast able stay up other racers struggling Finally landing flaperons can dropped further until just before touch-down about 450 slows landing speed drastically full-down position noticeable adverse yaw apply aileron oon trol Just careful drop flap erons too far too soon takes some practice can sure use T-tail two reasons First results two joining angles instead four between fin stab gives less drag other reason high-mounted stab less likely knocked off landing fuselage designed rugged provide ready access radio equip ment ballast compartments fiber glass cloth-over-balsa structure could replaced simple fiberglass shell have equipment dont Black Beauty beginners project though its really hard buildjust bit tedious hardest part whole building process enclosed flaperon hinge line perhaps tedious part making nose cone Broad general guidelines will given building Black Beauty just thatguidelines Most will undoubtedly find own way go Just couple things dont skimp applying fiberglass cloth resin sure sand finish shiny glasslike surface bare weight original Black Beauty 7 lb Though can legally ballasted 11 lb appears perform best strong winds 9 10 lb ballasted over 10 lb turns bit sluggish may change learn locate best center gravity CG position am told experts Eppler sections work best CG located about 40% mean aerody namic chord havent chance experiment Based its design features Black Beau ty given International Design Award 1984 International Slope Races award sponsored Mag num Imports owned Nancy Lowe determined vote pilots workers participate need now learn fly Wing construction standard foam core covered 6 balsa sheeting reinforced fiberglass cloth resin Due span foam oore cut four sections must carefully mated center midspan sheet balsa covering will also have spliced Left right panels butt-joined center section joint reinforced fulldepth Ys-in plywood extending out 2 either side centerline wing absolutely flat no dihedral plans show extent weight layer fiberglass cloth layers can actually put sequence since resin intermediate sanding will make blend together glass cloth layers will have overlapped because span main thing have number layers described plans four center three two finally layer tips will need spacious work area finished wing will one-piece unit almost 10 ft span will very cumber May1986 99 IJi Fig 1 s RC Slope Soaring rsce operates Youll need refer to follow discussion text turns made wind except start course thus flown Figure 8 pattern Turns made ilne pylons around Don Coulter snapped during construction Kens Black Beauty Note wing ex tends beyond ends worktable Youll need big workshop forthis one-plecewing some handle great strength worth shouldnt need tell undertake build wing layer fiberglass cloth applied impregnated resin sanded main structu completed youll have 10-ft fiberglassed board move around cut out flaperons make closed hinge line Take careful note angles flaperon hinge line structure cut cross-sectional photo shows best achieve cross section matter individual choice friend Don Coulter built original wing specifications cut trailing edge angle carefully bot tom up leaving overlap top untouched cut away top angle shown plans until flaperon separated finally cut away leading edge flaperon match angle needed allow required amount up-aileron travel Finally installed balsa leading trailing edges flaperon wing respec tively Dons comment has easier way dont know what would know easier way means use Just make sure hinge line close vital overall effective ness wing sliding servo system shown plans best system know flaperons incorporate differential aileron travel Note pushrods attached 450 offset center rotation servo addition aileron pusbrod control arms slanted back provide differential Differential aile ron travel reduces adverse yaw important model doesnt have rudder Let emphasize contour hardwood leading edge must faithful airfoil drawing possible blunt straightaway speed affected sharper turning ability reducedmaybe little little bit counts also important trailing edge sharp possible maximum performance Finally note hardwood faking center section fairs wing fuselage provides firm mount wing bolt Make -in hardwood sand shape Use microballoons fillet edge sheeting Fuselage nothing conventional box structure triangular braces corners fuselage box carved rounded final shape Only nose cone takes bit doing Heres approximate sequence constructing fuselage box Make -in sides Add 34-in triangular corner braces -in wing cradle doubler Install formers C-C E-E Join sides formers Pull sides together nose tail Add nose tail blocks Install vertical fin note basswood members go down inside fuselage bottom Install wing mounting blocks Mate wing fuselage add fairings fuselage leading edge LE shape wing fairings trailing edge TE flow smoothly fuselage Carve fuselage contoured shape Cut away hatch Make nose cone Styro foam tack-glue nose block Cover fuselage nose tail layer 2-oz fiberglass cloth Install elevator flex rod atthe LE coverthe vertical fin 6-oz fiberglass cloth Add second layer 2-oz cloth fuselage nose approximately in aft TE wing Add third layer 2-oz cloth fuselage nose 3 aft wing LE Wrap 4-inwide strips 4-oz fiberglass around fuselageone centered LE former other TE former Make fillets fin/fuselage joining line using micro ballons epoxy Add h-in triangular stock top fin stab platform Sand complete assembly smooth glassy surfaceusing several coats thin fiber glass resin 400-gilt wet/dry sandpaper Carefully cut nose cone nose block Melt gouge Styrofoam out fiberglass shell fill shell lead chips shot imbedded epoxy Reattach 5/B DOWEL CENTER BORED K_ V4NYLON BOLT A/B PLY FULL DEPTR CORE JOINERS -NO SIPEDRAL SLIDING SERVO TRAY SIJOINS SERVO TRAY HORSING OR PLY JOINERSLIDING SERVO OPPER SURFACESCHEMATIC FAIR NO CIRCUS JRCIRCOS JRMAO U NES-DORNED-DOS SERVOSERVO UARDW~~ WING CENTER SECTION DETAILMAX -y BALLASTTTERT RECEIVEB'---FIBERGLASS NOSE CORE FILLED WITH LEAD CHIPS3/IB BALSAHARDWOOD IN EPSOYHATCHGERVO RAILS 3/IA BA GA BASSWOOD NOSE BLOCATRIM OFF FOB FUSELAGE ORAPE 31A BALSA C 3/I6BALSA3/4TRI TRIM OFF FOR-STOTE 3/H TRI-STOUKA-A FENELAGE SHAPE I/R BAL 3/IA BALSALATCH LEADPINSHATCH \B VA AIJ SSWOOD NOSESLOCECIRCUS JR BOO-DOG SERVO T 4 D B nose cone nose block epoxy sand smooth Paint taste original sprayed acrylic enamel structure can take rough landings breaking points heaviest stresswhere wing mounting bolts can will get heavy side loads wing tip hits ground first Tail surfaces stabilizer elevator simple sheet balsa structures elevator shown plans can easily made 2-in Sig aileron stocksame shown TE vertical fin saves lot sanding Cover surfaces Super MonoKote minimum weight have time energy can shape stab thin symmetrical sec tion Doing will result small amount drag reduction Note hinge line elevator cut simple MonoKote hinge can used full length hinge line closes gap prevents flowthrough elevator deflected during vertically-banked turns No doubt stabilator system could devised instead would lower drag bit would weaker structure might able 100 Model Aviation cutaway section flaperon hinge line shows what probably dif ficult parts modei Sealing hinge essential good performance though Full-Size Plans Available. See Page 180 WINS CORE1/4 0/8 HARDWOOD LEAOING BUTT JOINTEDGE SEE WING DETAILSSHAPEO HARD BALSA FOR SHAPEI/IN BALSA WINSWING TIP SHEETING TOP B ____BOTTOM WINS STRUCTUREWING PLAN UNDERSIDE I FOAM CORE HARDWOOD L E BALSA TIPS LEFT PANEL 4AND HINGE LNE SUPPORTS 3/IA BALSA HI GE SUPPORT2 I/IA BALSA SHEET COVERING 3 3/4 FIBERGLASS CLOTH TIP TO TIP 4 SECONO LATER 3/4 OZ F/S 36 OUT FROM CENTER LIJE EACH SIDE S THIRD LAYER 3/4 DC F/S B OUT FROM CENTER LINE EACH SlOE FOURTh LAYER H OZ F/S B OUT FROM CENTER LINE EACH SIDE I/B HARD BALSA FLAPERON LEADING EDGE--TYPICAL I/IA BALSA SHEETING3/IA BALSA HINGE ER RU8 EPPLER 182 OR 3/R----0-----X-BALSA BA IAPPROSIBA ID EPPLER 182 FOAM CORE 3/4 BALSAFLAPERON TIP DETAIL APPROS ITRI -STOCK FUSELAGE IS BUILT OF I/B BALSA SHEET- COVERED HARDWOOD WINGWITH FIBERGLASS SEE TEST -SERVOMOUNT BLOCKFUSELAGE TOP VIEWI/H BALSA GREET FIN WITH ELEV CABLE BUILT INTO LEADING EDGE TRI-STOCK- j/4 BALSA 2 BALSA~~ T[jF1 jI WINS OUST BLOCK 1RON STOCKELEVATORMONOKOTE HINGE WINS SADDLE STABILIZERELEVATOR 1/4 BALSA SHEET -SEATINGELEVATOR73/B BALSA SING GREET TAPE -3/H TRI-STOCK6-GELEVATOR ElF3/4 TRI-STOCK APE FUSE TRIMOFF8AFTOFFORMER PRIOR TO TAPEFIBEROLASSING1/4I/U BASSWOOD 4 3/4 WINS SADDLEI/B BALSA WINS SEATINGFORWARD OF FORMERSHEETAILERONSTOCK FFAIRING FUSELAGE SHAPEF --BALSA TAILBLOCK F-8- EG BARGEI-/ -_-- 4 MAIN BALLAST LE O BLACK BEAUTY EDCOMPARTMENTI/B BALSA HINGBALLASTSHEET SIDES JELERBOLTSFUSELAGE SIDE VIEWTOP 8 BOTTOM SLOPE RACER DESIGNED BY KEN WILLARD TRACING BY JOE DEMARCO withstand hard landings strong winds Radio installation Servo installation wing fuselage shown plans battery forward nose receiver just ahead servo elevator Wrap both foam padding protection flex-cable runs servo along side fuselage point just aft TE former routed up leading edge fm over stab elevator horn Note fin LE cut out accept cable housing shown Section G-G Install cable before ap plying 6-oz fiberglass cloth fin will make LE smooth hatch cut away rest fuselage after shaped needs covered layer fiberglass cloth smoothness plans show held place simple aligning pin front sliding wire bolt rear provides quick access radio forward ballast area Ballast used two places nose set balance position desired location directly under center Continued page 180 May1986 101 Another view elevator horn connection necKerea sirip usa MOflONiU ningu ii joins second strip underside provides strong sealed hinge ilne No 509 Roscoel8 FF Outdoor Hand-Launched Glider features curved 18-in wing DT No 510Stamper$150 FF Outdoor Hand-Launched Glider has angular 18-in wing DT No 511F-lB$200 CL 1AA profile scale fighter spans 17 has tricycle landing gear No 512Extra 230$1650 RO Giant Scale aerobatic spans 8 ft uses Quadra engine Two sheets No 513Black Beauty$750 RC Slope-soaring racer has foam wing 2-channel RO Spans 114 inches No193SlIhile CL Stunt model McDonald winner 197619801982 FAt World Champs$ 315 No 239moe Birds RC Ken Willards formation plane 4-channel 1 0-power 75 No 262CruoIimaater CL Crash-proof trainer two sizes1 5-30- aod 3540-power 25 No 302Eel F-iS RC Sarpolus 049 ducted fan sport tiler 2-chaseel Balsa wings tail fuse structure$ 275 Ne 3101930 Fleet fliplam AC Sport Scale 35-40 4-channel Wingspan 56 % scale Two sheets$ 625 No 314Drake t AC Ken Willards flying boat 3-channel 1 5-power Fly land removahle gear$ 375 Na 326Taylor Cab AC Don Srulls Schoolyard-Scale 049s 2-3 channel Spans 50 in$ 350 No 332Zopliyr AC Small 2-channel glider far hand-launch tow thermal slope snaring$ 200 Ne 386Lemon 206 RC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 398See Bee 8-1 AC Haffkes latest %-scale spans 75 weighs 15 lb flies 90 larger Four sheets no doc$2225 Na 414 Etecldc Sparky AC electric-powered fun flier 05 motor 3-channel AC scaled ap 1939 rubber-power favorite $ 050 No 422 Sceoler AC Two-Meter Sailplane has wee Hats event 19921993 plus other contests 50 Ne 430 Ireeslde RC Zippy little sportoter 1 0-1 5 power 3-channel AC $ 400 Ne 433 Watts Up RC Electric-powered glider f 2-3 channels 035 motor opens 52 in. Ne 438 CruIser FF Embryo Endurance rubber-power fun ship has hig-model characteristics $ 200 No440 Canaler AC Old-Timer-like new design hasahugewinotorslow nasyflights 35 power 3 channels Two sheets $1725 Ne 444 Floobolt AC pusher canard spun/pattern uses 40 pusher engina 4-channel Has swept-forward teem wings $ 650 No 447 MIss Amoolca AC Old-Timer hA Teoaco model 049 glow 2-channels.$ 050 No 452 See Bee 2 AC Quarter-scale opens 71 uses 90 power Four sheets . $1 600 Ne 453 Smoelldo Prafile CL Profile rendition Bob Palmers super-Stunter early Fifties 35 power$ 550 No 454 Sweet P30 FF Neat stick-and-tissue Outdoor Rubber P-3D-class model contest-winner $ 200 Na 457 Spectra AC Electric-power 05-size motor uses 3 different wings fur sport soaring aerohatics $ 700 Na 460 4-40 AC Sheelder-wing sport flier fur 4-cycle 40-size engine 4 channels - $ 650 Ne 461 Tdsler Hamslornor Cl Famous unflapped Stunter late Forties Uses 35 engine $ 650 No 462 Pombe PS FF Jumbo Aubber Scale WW Italian observation plane $ 400 Ne 463 Platyhelmlelbos Yk AC hA Pylon racer uses lots life ply built-up structure fur strength lightness $ 475 No 465 Sloe Mast AC Fun-fly sportoter 40-size engines spans 52 Lightweight structure 00 No 467 Ale Sport FF Aubber Scale design won 83 Nats designer Don Srull Wingspeo 20 in. - 0 No 466 Smoolbor CL Stunter 29135 power Design based hybrid Smoothin/Nobler 675 No 470 Steokor AC Mid-wing spurtster uses 40145 four-stroke engina spons 50% tail-dragger - $ 650 No474 Pacer 15 FFNordicA-1 TuwlinaGliderweethel983WoddChamps $ 500 No475 Ooopbyelnel CL Slow Comhat model uses geodetic wing ceestruct lee 36 engine Two-sheet plan has ports patterns $ 400 Ne 477 MandarIn CL Sport Stuofer uses spurt 15 engine spans 35 in $ 325 No 476Botlernup AC Cute elfin sportofer uses micro 2-ch AC poise-rudder Spons 27 020-035 power$ 300 No 478Peor-Strabe Reenter AC Spurt/Aerobatics ship has 1 920s styling uses 90 4-stroke engine spaos 65 2 sheets$1100 No 460Rldlealous CL Fabulous competition Stuoter has 550 sA wing area flies TO 049I051 spens 47% in$ 600 No461Earapa AC Sailplane FAI competition has fihergiass fuselage foam wings wing flaps stabilator fail Spans 11Dm $ 700 Ne 462OeldeeAgor AC SporO/Aerohatic model looks lihe Golden Age sportster Far 60 engines spens 62 in$ 750 No 483CBS Nhwk Ultreilght PP Outdoor Gas Scale plane uses CD-2 power opens 2910$ 300 No 404 Aoroocs K AC Ouarfer-Scale 30s light p lane spans 9ff uses 12 cu 2-cyl 4-stroke en9ina weighs 11% lb Three sheets 5 No 486 MOe Atwood Speelak AC Spurt-Scale Galdeo Age air-racer uses 21 engina spans 45 in$ 925 No 467 Cap 21 AC Scale Aerohatic plana 40-size engine spans 62 Two sheets . $1000 No488 M6-7 FF Jumbo AubberScale 1920-era Thomas Morse Scoot biplane spans 37 $ 500 No 400 Weekender AC Low-wing sport flier 20-size 4-stroke engine opens 47% - $ 575 No 492 Clmolelon FF A-i Towline Glider spans 51 uses fiberglass fail boom circle-faw mechanism 50 No 493 Sopor Drone AC Sheelder-wing spurt flier spaos 69 in, uses 45-60 engina Two sheets$1275 No 494 HABOOt CL Very lightweight sport/Stunt en flies wind power alone 04915 power Spen 39 in.- $ 400 No495 FW-160 AC Hand-launched l-halsa scalelike sportoter 10-15 engines two AC channals Spens39 in $ 425 No496P47 Ttiaedeobelt AC Other half Dngfight Duo has similar characteristics FW-1 90$ 425 No 497Macbatten Pletes FF Indoor rubber cabin model ideal fur bnginnars Spans 20% $ 200 No 498MIdwest Sped Racer CL Simple rugged profile racer 35 engine spens 36 in$ 350 No 4994-60 AC Dec Mathews great sport flier 60-size tsar-stroker engine opens 70 Twosheets 275 No SOOFakkor DVt AC Sport scale model WW monoplane uses 90 four-stroke engine opens 83% Twosheets$1 600 501Eledecker CL Sport scale model early WW meeuplane %A power opens 23% in$ 200 Ne 502818 Wlnlore Vagabond FF Sport flier down-sized 02-powered 00mb 1940s cabin plane Spens 33%10$ 225 No 503Benabat AC Slope-snarer opens 60 uses 2 AC channels$ 750 No S04Tarbo Looce 8 FF Rubber-powered scale model opens 19% in$150 No SOSP-38LIgbtele6 CL Sport Scale fighter opens 65% weigholOlb uses twio 35s Twosheets 5 No 506Playmate AC Sport flier fur 3 AC chaunels 1 5-25 engines opens 50 in$ 650 No 507 Namndoklrd FF dot class NB Gas competition plane wee 85 Nats $ 750 Ne 508 8-25t CL Profile scale WW bomber twin %A enginas opens 30% in $ 400 ---- omor mOno w eenc r- Circle numbers plans wish order 193239262302310 I332386398414422 g -438440444447452 o-457460481462463 468470474475477 ZZO480481482483484 488490492493494 497498499500501 1511 512 513 504 505506507508 I NAME STREET CITY STATE 314326 430433 453454 465467 478479 486487 495496 502503 509510 Plan puce Includes first Class postage br US delivery Air Man over 300 mOe orderS outside US please add $250 Air Mail 125 surtace mail eaCh plan Make check money order payable US funds Model Aviation c/a AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefully Enclosed $__________________________________ ZIP Black Beauty/Willard Continued page 101 balance weight can added high-wind conditions changing CG location use lead sheet cut various sizes weights held place bolts wing nuts permitting rapid changes ballast wind conditions dictate flying What thrill systems checked out working have qualified associate launch Black Beauty wind nose slightly down will pick up speed rapidly ready racer will dive slightly wind light reaches flying speed level flight nose will come up racer will sliding through air silently swiftly may have make some minor trim adjustments Fly time check out control responses As get used sight model flashing through air can start making some pylon turns puffing nose down going highspeed flight Sensitivity controls matter individual taste set up - my pitman calls Turn can use full throw ailerons over-rolling hill Also elevator set vertical bank established racing turn full-up can used causing high-speed snap reason obvious heat excitement race have several occasions seen pilots over-roll Split-S alterna tively pull such tight turn elevator snap roll results surfaces set wont go far danger materially reduced Flying slope race course skill itself location will have its own characteristics several gen eral concepts apply Under normal wind conditions fly out tco far hill vertical component wind will less cant push fly tco close hill surface turbulence can throw racer off course Only practice time can help locate area best lift wind blowing oblique angle hill usually can improve lap speed flying upwind leg farther out downwind leg closer Reason closer hill angled wind gets tends go parallel hill True reduces lift same time increases tailwind vector Which aspect important depends particular site Again practice answer Slope racing exciting RC event know Black Beauty exciting racer Ive ever hope enjoy yours much responding advertisers mention thatyou read aboutthem ModelAviation I w nuuy 41 tonso ininvm 0mm- -9 m 180 Model Aviation 0 0 Cd 50 CJ CJ 0 Coo -0 5cr 60 Zn Co 0t 0 -E 0 0 C -- Co o b Con a 00 -5 i C CoO Co 0Co atd C 0 Co V nn QCo 0 Co 0 0 0 U at -c 10 n U a Co N mc Ia