ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation
Edition: Model Aviation - 1989/09
Page Numbers: 40, 41, 177, 178, 179, 180
ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation
Edition: Model Aviation - 1989/09
Page Numbers: 40, 41, 177, 178, 179, 180
ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation
Edition: Model Aviation - 1989/09
Page Numbers: 40, 41, 177, 178, 179, 180
ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation
Edition: Model Aviation - 1989/09
Page Numbers: 40, 41, 177, 178, 179, 180
ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation
Edition: Model Aviation - 1989/09
Page Numbers: 40, 41, 177, 178, 179, 180
ACE RICs new Easy Eagle Two-Meter trainer designed Harley Michaelis uses new SD 7032 airfoil first fruits Michael Sehg John Donovans research model Glider airfoils using Princeton Universitys lowspeed wind tunnel 7032 said offer outstanding LID lift-to-drag ratioEd forefront new generation airfoils think destined become standards Harleys description EE Easy Eagle Two-Meter entry-level Sail plane utilizing SD 7032 airfoil proven best thermal flying wind tunnel test Selig Donovan Basic controls rudder ele vator flap option included extra control flap servo goes wing avoid damage case wing knocked off bad landing kit extensively prefabricated balsa ply parts either die-cut machined wings flat center section has top bottom spruce spars machined A-in balsa vertical webs wing will handle high-tension launches winch heavy-duty hi-start Launches steep fast straight ship will zoom well Harleys Hinges latex rubber hinges packaged Ace used throughout flap mechanics used flaps can dropped 900 also reflexed better penetra tion little Down flap steepens launches Dropped way vertical dive can safely made flaps dropped level flight ship will quickly slow walk precision land ings flaps reflexed about 60 winds 20 mph can penetrated Easy Eagle handles ever easily unusually responsive thermals All-up weight 27 28 oz wing loading under 65 oz/sq ft will stay thermal turn rudder trim alone Stall characteristics extremely fa vorable will either just mush out gently por poise tow Construction wise two plywood formers subnose block first joined front sec tion bottom making sure everything square slab sides decks added fuselage essentially finished tail pieces automatically aligned during attachment Ele vator rudder servos size mounted either side front former keep fuse lage slim ship usually balances nose weight using 450/500-mAh battery pack re ceiver up front removable nose block lead shot may put stuck servo tape Wing Outer sections can glued center section made removable Machined dihedral braces A-in ply glued tip sections securing braces center section boxes common pin Wing mount options include dowels rubberbands main A-20 nylon screw screw-attach setup can put time Although primarily designed beginners Sailplane super airfoil steep fast tow flap option overall handling make Easy Eagle highly competitive little contest ship too Thanks description Harley Flaps trainer unusual undoubtedly good idea Beginners neednt use start once can steer around confidently flaps fun play can help learning good landing habits Like spoilers also useful getting down high altitudes out breaking something recommend Two-Meter size ships beginners because bounce better bigger planes Performance 100-in planes may bet ter beginners should mainly interested getting first plane up down piece Learning fly comes stick timenot making repairs Up now Airtronics Olym pie 650 Carl Goldberg Gentle Lady Sig Riser have top choices class looks like now Ace R/C Easy Eagle will right too new Thunderbird Ken Wagner HiPerformance Sailplanes recently introduced sig nificant new Unlimited class ship called Thun derbird havent actually seen yet description three-views appears have modern design features Its available two spans 136 144 Lets have Ken tell us history Tbird About four years ago Ray Olsen Arizona land business developer decided wanted take F3B building techniques apply high-technology Thermal-design airplane airplane developed quest has led him parts world met experts assembled ideas new plane Thunderbird Herk Stokely Virginia Beach VA editor Soar Tech encouraged him pur sue concept Dr Helmut Quabeck West German designer HQ airfoils several F3B designs helped moments nose tail wing planform Ray contributed wind tunnel tests Princeton out discussions Michael Selig John Donovan came airfoils fully camber-changing wings During process Lee Murray Appleton WI helped design lami nar flow nose cone did laser cutting computer work templates also Final de sign refinements completed Ken Stuhr VS Sailplanes Seattle WA Thunderbird should bring about new lev els flying made possible aerodynamic research Selig Donovan has designed entire airplane including ver tical fin stabilizers wings fuselage Taking L Ace RICs new Harley Micheells-designed Easy Eagle Two-Meter trainer Sketch Center shows new Thunderbird Hi-Performance Saliplanes all-out no-compromise Thermal Duration contest ship 136- 144-in wingspans Original design Excalibur R Mark Triebes MAs Slope Soaring columnist has Interesting pivoting outer panels wings roll control flap-like action up photo 40 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalla CO 80135 Mark Triebes says original Montero Hand-Launch design L unbeatable HL competition Sportsman F3B ship Center John Dvor ak Airtronics Cumic modified ailerons flaps Wing has flat center section carbon spar caps straight trailing edge Both wing stab fully sheeted John says might better cut down 112-in span Earl Levins SF3B entry named Quark R Its modified Off Ground Models Quasoar flaps ailerons span reduced 112 John Earl both members South Bay SS advantage new lightweight composite materi als potent combination exciting flight experience airplanes removable nose cone offers easy access radio equipment flaps ailerons driven servos wings double-taper wings come two forms built-up all-composite airfoil new Selig elliptical tips use different airfoil better characteristics Fliers can expect light wing load ings plug mold work manufac turing airplane being done Ron Karen Wagner Hi-Performance Sailplanes 17902 NE 156th St Woodinville WA 98072 telephone 1-206/487-1721 Kit features include fiberglass pressurebagged one-piece fuselage blue foam cores wings stabilizers choice balsawood HP Cell sheeting wing covering molded rudder carbon-fiber spar assembly basic hardware Controls ailerons flaps rudder elevator Price $250 plus COD shipping Ken Karen make some other kits fuse lages finished wings also handle nice line supplies vacuum pressure bag ging Pressure-bagging technique make fuselage laying epoxy-wetted glass/Kevlar cloth inside full mold both sides big balloon inside Inflating balloon forces cloth good contact mold wind up one-piece fuselage made shot instead two halves joined down middle Materials sale include FIG cloth car bon laminates braided tubing honeycomb lar several kinds epoxy resins SASE Ken will get full story have interest Thunder bird HP Cell sheeting Id strongly suggest sending $20 plus $250 sbipping Kens twohour VHS videotape showing step-by-step process making HP Cell wing including vacuum-bagging using Mylar carrier sheet As bonus worth price alone tape includes footage 1988 Richland Scale Slope Fun Fly including construction flying shots fabulous 14-ft-span 35-lb Northrop YB-49 flying wing built flown SASS club Seattle Seeing big wing air really something special New designs Mark Triebes MA s Slope col umnist also very active Thermal flying Mark sent description recent projects Thought might like see two latest designs large ship Thermal/F3B design first prototype has pivoting tips roll con trol flaps Both tips pivot up trailing edge up slow plane landings can seen photo method works need throw really get plane slowed down second prototype will pure F3B ship beefier construction smaller stab faster air foil conventional aileron flap control sur faces Im sure loads pivoting tips servos would too great F3B flying stand up Some specifics design three-piece wing foam core balsa sheeting carbon fiber spars 100-in span 850 sq 42 oz 71oz/sq-ft loading Selig 4061 airfoil Initial flight tests show great promise Continued page 177 SCAt RADIO CONTROL Q VINTAGE sizes21/4 3431/i 13% 143/o 11/25 17/i6% CONTROL-UNE GOLDEN AGE sizes21/4 3/43/g 13 114 4/a 11/45 17/i6 SCALE PILOTS MACNINE GUN KITS CYUNDERS ELS FREE-FLIGHT NEW BALLOON 24 314514 33/4 ENGINE KITS PLASTIC DISPLAY MODELS Send $3 fully Illustrated catalog other kits accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix September 1989 41 SMOOTH CONTOUR 34234 1314 11/4334 14hz 214514 TALOG SAVINGS BALSAM Special Fast Thrnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification Spectrum Analyzers Calibrated Test Instruments Large Inventory RIC Parts Crystals SAFE FLYING IS NO ACCIDENT UPS US Mail arid Federal Express Used Mastercard Visa Accepted Send Large Self Addressed Envelope Brochures 3 New ARFs ZMP SUKHOI Su-26M 1/5 Scale span 68 area 890 sq motor 4 stroke 120 equiv Preassembled lightweight epoxy fuselage sheeted plug-in wings sheeted stab fin & rudder 8 dis epoxy cowl Lexan canopy & illustrated assembly manual IMPALA Masters Pattern span 66 area 800 aw motor 4 stroke 120 60 rear Preassembled balsa fuselage veneered plug-in wings & stabs Epoxy cowl pipe cover removable canopy Illustrated assembly manual see hobby dealer order direct MONARCH AMA Sport Pattern span 66 area 750 sq motor 4 stroke 90 60 cu Preassembled balsa fuselage veneered wing shaped balsa parts Lexsn canopy epoxy cowl illustrated assembly manual ZIMPRO MARKETING ' Pu 5011 JaTi xui iIIOGE Ta 3035 iaONr iS11B2-6180 Apply two thinned Coats 50-50 plasticized clear dope Sig Litecoat works quite well Make nose block propeller unit shown plans nose block con structed three sections A-in balsa sheet laminated together Use hard balsa section fits F-i make sure its snug fit model may finished cabin job racer sport plane fighteror anything else can dream up also have unlimited choice color scheme sure use compatible plas ticized dope Sig Supercoat fits category Weight can saved using felt-tip marking pens permanent ink MonoKote trim sheets and/or striping tape work well making dec orations Flying used two loops A-in rubber fly prototype Since flying area quite small used 12-in loops Let size flying field guide determining length loops Test glide model over high grass possi ble Use modeling clay achieve correct bal ance acquire smooth glide stalling crank about 100 turns give try prototype turned right climbed about 20 feet youre satisfied its flight characteristics put name address telephone number crank turns Since rubber varies greatly quality make up second motor lubricate wind destruction sets limiting threshold can safely use 80% turns destroyed test motor norm Happy landingbefore goes OOS RC Soaring/Blakeslee Continued page 41 Im really looking forward getting F3B ver sion built airborne ship has named Excalibur second design Montero handlaunch plane As Scimitar tail fixed control both roll pitch ob tamed pivoting wings little ship spans 15 meters 59 weighs just un der 12 oz Construction mainly balsa carbon-fiber-reinforced spars carbon-fiber wing rod allows zoom launches off club winches airfoil Eppler 387 Hand launches high will see little ship Montero will easily out turn Sailplane around really ball fly put simply undoubtedly best hand-launched Sailplane existence am look ing forward taking Eric Jackson biter Nats Hey Strong words Mark Nothing like little controversy make competition little teresting always say Since issue will Out just after conclu sion 89 AMA Nats hope good clean flying no hitting below belt best plane won Sportsman F3B update Mark Triebes Excali bur entry Jim Grays R/C Soaring Digest Challenge good spot bring up date progress SF3B front As know objective SF3B pro vide middle ground between AMA Thermal Du ration bona fide FAI F3B competitions SF3B will multitask Duration Speed Distance similar F3B limitations will put aircraft make affordable easier handle Multitask contests involve activity cause need flag turns Speed Distance tasks contests will set up painless possible clubs run few clubs around country have holding F3Blike multitask contests years current SF3B program really just attempt come up less standardized rulesand encourage other clubs give kind flying try Please keep open mind RCSD Challenge design competition planes would good SF3B competi lion Challenge winner SF3B rules chosen ad hoc committee June since Im writing May cant tell out come Committee members include Jim Gray model magazine columnists Randy Rey nolds editor F3B-USA newsletter John Dvorak editor South Bay SS newsletter Gus Peleuses editor Capital Area SA newsletter principal limitation planes weight maximum ballast 75 80 oz will SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd. Melbourne FL 32935 Dmaler/OletrIbutinr Inqulrlee Invl8ed Florida Residents Add 6% Sales Tax September 1989 177 415 342 5581 GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO CA 94128 M/C OR COD CATALOG $ 200 OR FREE MTh ORDERS HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4fT $ 5 HA TORI TETTRA DICICON IM-MSK WE NEED DEALERS Rob FiorenzeI Hobby Center Inc Mall Order Complete Line Hobby Supplies Dealer YellowAircraft Now svailable Fastcover Covering Material Visit Showroom 35 mIx Disney World a/Cool Power Fuels Discounted 420 West SR 434407 327-8353 Winter Springs FL 32708Fax 407 327-7148 aor scrg CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dont carry Square Cat Teals call us pay far call well pay shipping ix us sad Caxada COD Extra Bill Effinger * says OnlyPlans Patterove Sets give assorted deagna want have salected best clasoic decigne time fox choose patterne pert important exclusive feature Golden Age V Scale Curtisa Hawk P-i 68lengthSfYewingspan 2268 sq wing area 1323 engines choroxel SIC RCOS-t4 86 V Scale Curtisa Falcon g3 length wing spun 3160sqinwiogareadchs/C / ACOS-IS 5 118 Scala Cesana AW g1wingspongogpu inwing ares 25 60 engines 3-4 channel SIC RC6S1 96 113 Scale Piper Cub J-3 11 mg wing spun length 2680 sq wing area 20 to 35 cid engines 4 channel SIC 2 6Wr Quarter Scale WW SE-SA ogo ft spun sq wing area 76 22 engines SCOS-7 9 SPAD C-XIII 7g Va span 0 eq wing eree13 31 engines Capable flyer-it captures imagination RCQS-6 5 FOKKER OR-i TRIPLANE 72 wing span 2 sq wing area 76 100 engines SCQS-5 $2486 N SOPWITH CAMEL Fi 64 wing spun sq wing area 11 lbs wlo SIC ood & balsa conetruction over 65 eq ft drawings RCOS-f f 6 N OW Piper TrI-Pacer PA22 One-Third Scale0 116-318 wing spun 02368 sq wing area 20 xv 30 vid engives Pox 4-5 channel SIC oo 12 lbs 16 overall length Plywoodlbalsa fulselago rewoveable wing paneis steeroblo nose wheol designed easy ground handling authentic scale flight performance 5C35362886 9111 Effieger Fasedina Mawbar AMA NPFS Hall Fewer Prices complete plans sub assembly detailed parts lists Add $260 Mailing Tuba Sand brochure ho ahead thu crowd new brochure showing new Plan Sets 1668 Send 51 refundable f et orderi WE TECHNICAL SERVICES PO Box 76884A Atlanta GA 30328 EASY AS 1-2-3 Instructional Videotapes HOW TO VACUUM BAG FIBERGL4SS WINGS AND WHERE TO BUY j~rr AND MAKING FIBERGLASS o~srr otapes give ABCrs making fiberglass molds wings what equipment material will need tapes allow manufac tore fiberglass part technique CUTI ING FOAM CORES AND MAKING TEM PLATES rs step-by-step technique foam wings plans Automatic Hands Off Foam cutter wili give Sharp Trailing Edges will given videotape Bonus DRAWING PLANS & PHOTOS FOR BAT TERY POWERED BUBBLE BLOWER Bubble Blower puts out million bubbles Its ap plication study thermals great Hand Launch Thermal flying PRICING HOW TO VACUUM BAG3495 Shipping MAKING MOLDS3495 Shipping CUfl1NG FOAM CORES3495 Shipping BATTERY BUBBLE BLOWER PLANS699 Avallable VHS & BETA Texas residents add 8% sales tax Pricing Subject Change Without Notice permit designer/builders fly planes around 90- 1 15-in wingspans 10- 13-ox/sq-ft wing loadings Planes size weight should good all-around performers club Thermal contests Slope flying well SF3B Smaller ships heavier wing loadings would better Speed task good Duration Distance Larger lightly loaded planes might better Duration good Speed Maybe itll best op timize Distance compromise little Duration Speed Most designs will have aile rons flaps dont rule out good fast poly hedral ships table below can appre ciate very interesting challenge facing design cr5 Wing Area 1000 900 800 700 Total Weight 70 oz 80 ox 101 112 126 144 Aspect Ratio 14 12 10 8 11511911010090 1281121049585 144106989080 16599928475 figures under Total Weight wing loadings oz/sq ft four different wing areas shown first column figures under Aspect Ratio wingspans inches four areas aspect ratios shown Assum ing 75 oz max designers can still get wing load ings will provide reasonably good speeds 11 13 oz/sq ft wingspans around 100 112 picking area between 800 950 sq aspect ratio 11 14 problem wing area loading versus aspect ra tio Reynolds number example Don Chanceys Conquest de rived Bounty Hunter design has developing six seven years BH has very successful record Texas Thermal contests Conquest has 100-in span 930 sq area 107 aspect ratio Don said its best all-around flying weight 70 oz wing loading 107 oz/sq ft Please dont fall trap thinking faster plane no importance because fly Thermal Duration ability cover bigger area looking thermals impor tant being able go up light lift Actually youll find heavier faster efficiently designed built Gliders suffer pure thermaling depart ment Also theyre lot nicer have wind comes up true contest pilots would still flying Windrifters addition Marks Excalibur other designs RCSD Challenge Dons Conquest Don Edbergs Hustler Mark Allens Falcon 880 perhaps Ed Berton Some kit planes well suited SF3B can modified suitable Airtronics Cumic Sagitta 900 Bob Sealy Pulsar Bob Dodgson Camano Edmonds Models England Algebra 25 Racer Larry Jolly Pantera Chee tah Off Ground Models Quasoarr Pierce Aero Gemini MTS Stay tuned Next months column should have Challenge winner rundown recom mended rules Theres still time season clubs give tryout Remember Sportsman F3B program designed FUN Sportsman flier Talk over flying buddies get club give tryat least fun-fly basis Please let know goes over Brian Agnew Mariah July column photos Ed Bertons description new Two-Meter kit called Mariah Brian Ag new Fort Meyers has summers flying Mariah kind enough write share some experiences Youll recall 88 Tidewater Nats Brian won everything took Two-Meter Standard Unlimited classes won Lee Renaud Memorial Trophy Hi Johnson Trophy shared Dan Pruss Team Award Florida 55 teammates John Ag new dad Lee Montgomery So can believe Brian knows thing two about contest flying once design comes along because its own uniqueness depar ture mainstream things soon estab lishes itself classic Windfree Aquila Bird Time Sagitta Windsong Prodigy classics believe Ed Berton Com petition Products has designed Two-Meter may soon classic Ed has designing developing Marish over three years just year has released kit form two versions kit eitherF/G carbonfiber tail boom C/F boom stronger lighter expensive Mariah sports Selig 4061 airfoil has ai lerons flaps pod-and-boom fuselage clean one-piece wing flat center section dihedral tips wings foam sheeted 1/16 balsa tips have 1 0 wash out cut cores ship extremely clean excellent speed range superb han dling step thermaling landing kit itself highest quality have ever seen packaging wood selection instruc tions CAD- computer-assisted-design Ed drawn plans topnotch Ed has taken step imaginable ensure building done have perfectly built Sail plane humanly possible instance actually two sets foam core wings supplied 178 Model Aviation Picture Worth Thousand Words ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AH Designs43 AMA Membership15 Academy Aviation R&D39 Ace Radio Control13 Aerodrome Models Ltd8 Aerospace Composite Prod142 Airline Supply Co146 Airtronics215 Altech Marketing75-76 American Sailplane Des164 Authorized RC Service45 B&P Associates47 Quay Barber Models172 Boyd Beaman45 Blue Ridge Mach & Tools160 Bolar Heli Research160 Bomber Field Inc147 Dave Brown Products37 Byron Originals81 143 Ca Ra Products47 Campbell Tools Co176 Campbells Custom Kits174 Century Import/Export158 Channel 1 Productions178 Cleveland Model Supply20 Competition Products147 Composite Aircraft Eng172 Control Systems Labs153 Coverite98-99 Cox Hobbies88 Crenshaw Aero176 Culpepper Models Inc172 Cygnet Software165 D&R Aircraft Mfg152 DGA Designs18 Doylejet160 Du-Bro Products Inc86 97 Duracraft94 Dodgson Designs162 Elden-Ken Electronics164 FAI Model Supply159 FHS Supply Inc22-23 Fiorenze Hobby Center177 Fitzpatrick166 Flights Fancy Aeromodel151 Flyline Models8 Fourmost Products4 Fults Dual Struts174 Futaba Corp America82-83 G&A Products161 GM Precision Products173 Gator RC Products168 Carl Goldberg Models160-161 Golden Gate Hobbies177 Gorham Model Products12 Paul K Guillow Inc175 High Sky151 Hobby Barn140-141 Hobby Dynamics84 100 163 Hobby Horn10 Hobby Lobby International154-157 Hobby Woods41 Bob Holman Plans12 Ikon Northwest Co17 Indy RC Sales Inc148-150 JR Radios84 163 JTec33 Jan Crystals16 Larry Jolly Model Products174 Jomar20 K&B Mfg174 K&S Engineering43 Kingsway Enterprises172 Kraft Midwest41 Kustom Kraftsmanship142 Kyosho107 Lone Star Models16 MACS Products165 Jim Messers152 Micro Mark6-7 Midwest Products21 Model Products Corp33 Model Rectifier Corp y 2&3 19 64 Sid Morgan Plans164 Walt Moucha Models161 Mutchlers Hobbies144-145 NF Video Library47 North Products176 Northeast Aerodynamics4 Northwest Hobby Supply11 Pacer Tech1164 175 Parrish Aircraft45 Paper Airplanes Intl138 Pattern Tek146 John Peck Leisure Prod167 Penn Valley Hobby Center161 Performance Products Ultd39 Pica Products10 Plane Video18 Planes & Things162 Polks Hobby105 Pro-Tune Corp159 Progress Mfg Co74 RC Buyers Guide17 RC Designs18 RC Extras161 RJL Industries153 Ragan/Barker Group151 Red Max Fuel22-23 Robart5 Robbe Model Sport8 Roun Tuit152 SAC166 SR Batteries139 Saohs TG176 Safety Plus16 43 Satellite City9 Scale Glider Components153 Scale Model Research177 Scale Plans & Photo Ser160 Sermos RC Snap Connectors152 Shamrock Competition Imports49 Sheldons Hobby Shop20 Sig Mfg Co4 93 167 Smith Enterprises8 Bob Smith Industries39 45 Square Cut Tools177 Stangel Enterprises165 Sunshine Hobbies172 Superior Aircraft49 Swanson Assoc142 Tatone Products Co175 Frank Tiano Ent159 Tidewater Hobby Enterprises33 Top Flite Models Inc87 Tower Hobbies169-171 Tru-Turn138 VL Products168 Vinylwrite Custom Lettering173 WE Technical Services178 Webra100 Williams Brothers41 Windsor Propeller Co37 World EnginesCover 4 Zimpro Marketing177 Nick Ziroli Models158 kitthe actual construction cores what Ed calls full-size cores full-size cores cut final shape wing used mold hold construction cores place during sheeting cores full-size beds fully support trailing edge would extend out construction core beds end result perfectly straight trail ing edge sharp strong can Ed provides high-density balsa used specifi cally trailing edge comes Out strong resists warping during covering instance deviated Eds instructions application balsa skins cores least five dif ferent equally effective ways doing Ed recommends 3M 77 spray adhesive chose use epoxy Its mostly matter using technique feel comfortable youve never skinned foam cores before use Eds method cant go wrong use epoxy careful avoid excessive weight wing held fuselage rather unique fashion nylon screw usedbut rather having screw go through top wing fuselage Ed has go through bottom fuselage bot tom wing no protruding screw head fuselage has plenty room almost size radio miniservos careful plan ning releasable towhook can also fitted probably room Thermic Sniffler releasable towhook installed Flying Mariah absolute joy han dles beautifully location center-ofgravity seems critical S-4061 airfoilit should flown 38-42% range depending can fly smoothest flaps very useful thermaling help slow plane down allow flown tighter tighter circles until practically standing wing tip plane lot fun hand launch will go up smallest ther mals Spot landings unreal flap/eleva tor compensation Mariah responds posi tive fashion way spot Accuracy limited pilots ability sum up Mariah highperformance Two-Meter ship can open up pilots flying skills Its flight characteristics docile yet aggressive would make ex cellent first aileron ship someone wants transition polyhedral ailerons should considered beginners project must remembered Mariah total de sign concept After years development Ed has designed aspect Mariah specific purpose Modifications should attempted own risk highly recommend Mariah intermediate-to-expert builders/fliers looking extra performance edge often makes difference contests high quality kit reflected its price compared other kits really bargain thanks letter Brian high recommendation cant resist trying Ma riah myself Ed can reached Competition Products 921 Birdie Way Apollo Beach FL 33570 telephone 1-813/645-5171 Kit price C/F tail boom $160 $140 F/G boom both including UPS shipping Definitely cheap top-quality competition Sailplanes other things get pretty much what pay Video cutting foam cores June col umn mentioned Julian Tamezs video September 1989 179 No 628 PrIme Cut$1300 RO Sport/Aerobatic plane spans 90 uses Quadra 35140-size power Two plan sheets No 629 P-51B Mustang$1275 CL Sport Scale craft spans 60 in, uses 30/40 power Constructed mostly cardboard Two plan sheets no documentation No 193Stiletto CL Stunt model McDonald winner 1976 1980 1982 FAI World Champs$375 No 239Blue Birds AC Ken Willards formation plane 4-channel 10/15 power$375 No 262crashlnsater Cl Craoh-proof trainer two sizes15/30 aod 35140 power$125 No 3101930 Fleet Biplane AC Sport Scale tor 35140 4-chsooel Wlogopso 56 /n scale Two oheeto$625 No 314Drake II AC Keo Willarda flylog boat tar 3-chaooel 15-power Fly trum leod removable gearS375 No 326Taylor cub AC Duo Srulls Schoolyard-Scale 040s 2-3 chaooel Spoos 50 inS350 No 332Zephyr AG Small 2-chaooel glider tor hand-launch tow thermal slope soaring$200 No 386Laser 200 AC Sport Scale replica championship Aerobatic flier Uses 40 power 4-5 channel Two oheets$1075 No 447112A MIss America AC Old-Timer Texaco model 049 glow 2-chunnelo$650 No 460440 RC Shoulder-wing sport flier 4-cycle 40-size engine 4 chaooels$650 No 465Blue Max RC Fun-fly upsrtOter 40-size engines spans 52 Lightweight structure$700 No 521comet Jr clipper Plus 35% RC Old-Timer sportuter engine 2-ch RC spans 40 in$650 No 528Swallow RC Lightweight holdogger far 40-sine tour-stroke engines spans 58 in$025 No 531Terrible Coupe FF Rubber-powered Coupe dRiver spans 48 conteut-winnerS475 No 533ceasna G-37 AC Schoolyard Scale famous 30s plane fur 040110 power 2-tb spana 42 in$500 No 5341936 challenger AC Tesaco Old-Timer opano 47 far 049 engion 2-channel ACS550 No 535Atrix RC AMA Class P Sailplane spans 110 uses 4-channel RC system$725 No 539Sinnitar Slow-Motion 15 AC Tailless flying wing 15 engines spans 60 uses 3-ch AC$350 No 541Parakeet AC Spnrt biplaoe 15/25 engines 3-channel AC equipment spans 42 inS675 No 554Super Doubler II AC Sport AerobaticsPylon fur 40/46 four-stroke engine spans 57 in$575 No 569Electrostreak AC Electric aerohatic plane spans 44 uses 05 motor$550 No 570Busy Bee FF Pee Wee-30 plane 02 power opens 30 has either sheet-balsa built-up surfaces$400 No 572TR-260 AC Span Stale Aerobatic plane far 4-stroke 60/65 power spans 66 in$1100 No 575ScorpIon 60 AC Fun-fly aerabatic plane tsr 60 power spans 50 in$1150 No 576Serendipity ndoor EZO record-holder opens 17% in$325 No 578Schweizer 1-268 AC Guarter-ocale Sailplane apons 125 Two plan sheets$1475 No 581Gee Bee Model Y AC Golden Age Aster spans 72 stole fur 60 pawer Three plan sheets$1175 No 583Sportwagon AC gadlo-ned sport FF model spans 54 uses 10/15 engine$700 No 585Dragonfly FF High-performance P-30 Robber ship spans 30 weighs 50 grams$400 No 586Snapdragon AC Fun-fly/apsrsater 25/30 enginea opens 45 iv$600 No 588Marish AC Slope-Seadog Sailplane spans 41 uses 2 AC cheontlo$425 No 593Taylorceaft AC Sport Scale lightylane hoilds standard 2-placer clipped-wing air show stunt Spaos either 70 er 58 30/40 two-stroke 40140 four-stroke engine Two plan ohetto no documentalion$1000 No 595Sparrow AC Sportster tsr 25 engines spans 43 is$650 No 596Tomahawk CL Profile Stunter uses 35 engine spans 46 10$500 No 598coronet 160 AC-Assist Old-Timer enlarged 150% spans 72 uses 40-size 4-stroke/3D-size 2-stroheS050 No 601Nickel AC Sportater toglne 3 AC chaooels Spaoo 44 inSS00 No 602Lii Bit CL Stuoter spans 27 has flapsS250 No 603Sparrow Hawk P3D FF Competition rubber-power plaoe won 87 Nato Spans 30 in$225 No 604Aeronca AC Electric spmlster 05 motor spans 06 uses 3 AC Crsooels$900 No 60521 Sport Speed CL Competition Speed plane spass 21 io uses 21 engioe metal pan$325 No 606Astrostar FF competition plaoe spans 401/ has 317 sq wing area$500 No 607Curtlsa Seagull AC Giant Scale biplane spaos 00 uses Goadra/Zeonab power Thme p100 sheets ox dxc$2400 No 608Top Fun CL traioer spons 24 10$325 No 609Taperwlng AC bA Pylon Aucer sysos 29 Plan plus parts template sheetS800 No 610Prosobype AC Sport biplane spans 48 io uses 45/2-cycle sr Og/4-oycle power$650 No 611cabinair FF Scalelike rubber-power biplane sport flier spans 23 in$400 No 612NVCL Dragonfly Cl Combat plane all-wood spans 24 Far reed-oslee engine$200 No 613Short Sterling AC Sport Scale WW II bomber uses four 15-size engines spans 74 No documentatioo$2050 No 614Electrocutor AC Electric sportster 05 direct-ddse motor spans 44 in$575 No 615Argosy CL Sport Scale Twenties-era tdmotor biplane tranaport apano 46 uses 40 twin mA esgines$1100 No 616Raunchy FF Perrymaoa Nostalgia Gas composition plane spans 4g is$400 No 617 Push-Pull 240 AC Twin-engine aportoter spass 66 noes 40 englses$1475 No 618Skyraider CL Sport Scale profile plase spans 30 15125 power$475 No 619 KeIth Rider R4 FF Scale Golden A6e racer tar rubber power spasa 16 in$300 No 620Gimlet 40 AC Spont/Pattem plant apons 60 fur 40/50 engine 2 oheefa$1100 No 621Thunderbird 60 CL Sg Stunter spans 61 fer 60-size onglne 2 abeets$1150 No 823 QuIck P40 PP Competitino robber-power P-30-tlaso plane spans 30 in$325 No 623 Henderson Longater AC Quarter-stale 1933 flianer oposo 9Q5/ le 4-stroke 40/48 engine 3 plus ohs no doc. $ 1650 No 624Keleher Lark AC Osartar-scale hamebuilt spans 69 60/90 4-struka power 2 plan sheets dot$ 1100 No 625AntoInette CL Stole esely Fmocb monoplane spans 45 in. uses 25/35 power$ S7S No 626Sweapas AC Sport/Paoern canards forward-swept wing spans 64 oses 40 power 2 plan sheets$ 1300 No 627Apiary CL Sport/Stontar spans 26 uses Cox Queen See 074 power$ 225 6 0 05 cj 05 td 0 05CC -i 05 0 c6 00 05 0 ZE 0 0 iiic: CO Os anb 0 -- 05 0 e2 C 05 C 0 05 05 2 N h-an 0 an 05 C ce jO05 193239262310314326332386 0 447460465521528531533534 0005 Can j 2535539541554569570572575 aneO05 00 578 581 583 585 586 588 593 Z Z 0 595 596 598 601 602 603 604 605 05606607608609610611612613 0~614615616617618619620621 0622623624625626627628629 to Plan price includes first class postage US delivery Air Mail over 300 miles orders non-US address lease add $250 tar Air Mail osta e handlin tar Ian 05 toanMake eck money order 1ayable US funds drawn US bank Model Aviation AMA 1810 el Morse Dr Reston 2090 Please allow 3 6 weeks delivery Please print caretullyEnclosed $ CC NAME ___________________________________________ AMA No _______________ EET o CITY & TATE __________________________________ ZIPJ -I Fcircie numbers of plans wish order best handling please include pay- mont some other service plans order II II II II II II I______ I___________________ II U Vacuum-Bag Fiberglass Wings Buy Materials Julian just sent another tape called Cutting Foam Cores Making Tem plates tape equally informative bagging Ito packed tidbits knowl edge would have learned hard way went foam cutting benefit good teacheror tape Especially interesting Julians description make automatic foam-cutting machine Julians machine designed Jim Fans drawings included tape Itll easy make yourself After see Ohio machine operation youll know way go Julians tapes $3495 plus $350 shipping NSS LSF members get 20% off really good deal has third tape havent seen yet called Making Fiberglass Molds Julian has Sailplane construction pretty completely covered address Channel 1 Productions 19827 Bishops Gate Suite 1 Hum ble TX 77338 telephone 1-713/540-4575 Seventh National Sailplane Symposium MARCS club Madison will putting its seventh annual Symposium weekend No vember 4 5 Theyve great past year looks like blockbuster Get load lineup Michael Selig John Donovan David Fraser will report Princeton low Reyn olds number airfoil tests George Steiner contemporary radio prob lems Larry Jolly Sailplane design Walter Panknin W Germany tailless Sail plane design Ed Elaranto Univ Wisconsin Meteorology Dept thermal development Walt Good Militky Cup competition Switzerland Plus table clinics demonstrations Saturday night banquet everything else goes along good weekend Princeton results have anxiously awaited past couple years Hear straight horses mouth Larry will have recently competed USA F3B World Championships France bet could persuaded talk about too Dr El aranto spoke last year said report March issue talk videotapes show ing actual thermals taken laser radar worth trip alone Also usual attendees arriving Fri day midmorning invited go great guided tour EAA Museum Oshkosh pilgrimage true aviation buffs must make least once lives Best make reservations early Ramada Inn conference held 3841 E Washing ton Ave Madison WI 53704 further infor mation write Bill Vogelsang 5933 Mayhill Dr Madison WI 53711 SOAR Great Race XII souvenir issue available mail $3 Cross-country fans will want 16-page recap 1988 race add collection Soaring memorabilia lists dimensions airfoil weight other par ticulars entries well three-views top three finishers Jim Melntire guy charge think dont have ad dress check Jack Hiner 2213 Prentiss Creek Apt 104 Downers Grove IL 60516 should serve just well 1989 Great Race XIII held June extra $3 will put list souvenir issue its avail able 180 Model Aviation