SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE
Edition: Model Aviation - 1992/05
Page Numbers: 78, 79, 163, 166, 168, 169, 170, 171
SCALE GROB revisited Remember photos giant Grob Januarys column Dan Troxell told buying 1 24-scale Grob fuselage Germany shipping home California building own wings 24-ft wingspan must largest Sailplane kit can get Dan made fuselage G-103 Twin II version two fixed front wheels flew Grob successfully both hi-start launches off slope another Scale nut have giant GrobRobin Lehman New York Robin probably has biggest fleet A-scale larger Sailplanes country says about 20 last count does launching aero-tow safest way get big Scale birds air Youll recall Robin described visit Giant Scale Glider meet Switzerland February column Robin very kind send photos Grob letter happy see pictures Dan Troxells big Grob January Model Aviation now have beautiful large Sailplane use aero-towing tow plane Robin 99 Quadra 80 nose first flight wasnt sure long would take become airborne first flight done airport concrete runway As turned out Grob airborne within 80 ft proved real floater Its easiest Glider have ever flown looks just like full-size thing air Interestingly Dan made wings based German Krause companys Libelle A-size Glider much smaller Grobbut real floater well opportunity see Roland Kern-manufactured allglass Grobs aero-tow meet Belp Switzerland summer wing section Roland uses factory version copy full-size section doesnt float anywhere near well Dans wing uses Quabeck 3/13 airfoil Rolands also flies quite bit faster Roland demonstrated Grob 1988 Nats Virginia believe Dans version really has seen believed new Hobby Lobby catalog No 19 now available Its free USA calling 615 373-1444 best wish books can get Its especially good German Scale kits Electric kits electric motors kinds gadgets gismos cant find elsewhere Several new items catalog caught eye plastic mounting set installing servos wingsthe modern way operate ailerons and/or flaps mount 1 long pack four retails less $6 like method installing servos can also done making wood mounts wings because uses mounting lugs secure servo ie dont need cut off per some methods Screws washers hold servos place screw can also hold cover plate fairing place top servo Speaking fairings about Graupners new aileron servo covers 3 long 2 wide Y4 high price about $5 per pair neat idea because solves 78 Model Aviation Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Graupner aileronhfiap pushrod fairings also Topaz newly Improved kit Premier cover servo neat idea theyre avail- England lightweight all-wood Sailplane able Hobby Lobby under $5 per pair can built either 124- 136-in wing Kit Hobby Lobby priced under $100 Servo fiat mounts designed hold micro servos wings operating ailerons flaps Get em Hobby Lobby Left Robin Lehmans big 24-ft-span Grob 102 Twin ii waits foreground tow plane gets checked out Robin does launching aero-tow Grobs first flight about take place went off flawlesslyan easy flier great floater Right Robin wife Marie pose big Grob Photos taken Suffolk County Airport New York Robin wanted long runway first flight problem covering servo fairing arm/pushrod shot new item Topaz H Sailplane kit Premier England improved has sale price $97 Everything included build wing either 124- 136-in span airfoil flat-bottomed said have good wind penetration characteristics Its conventional balsa-and-spruce kit includes spoilers wing camber mixingand dont need computer radio fly Topaz can built light enough have wing loading about 7 ozIsq ft should make real floater light-lift days LSF news Last month report LSF officers very exciting news about LSF National Championships held Vincennes Indiana July 18-25 will big eight-day contest featuring nine events Entries limited eight per frequency forgot send entry form today Send SASE [SF President Mike Stump 607 Washington St Cadillac MI 49601 addition new National Champs contest LSF Board has also set out goals 1992 Strengthen regional contest program Increase effectiveness communication members Provide input Soaring rules via NSS Soaring Special Interest Group AMA Research additional tasks Level V fliers Mike other officers would appreciate hearing input may have objectivesor other ideas well number priority year giving prompt service LSF Achievement vouchers sent please remember send voucher new address LSF 10173 St Joe Rd Ft Wayne IN 46835 Longitudinal Pitch Trim Ben Clerx article first appeared Zoomie newsletter Central Valley RC Soaring Club Visalia California spotted Capital Area Soaring Association newsletter edited Gus Peleuses Good articles run through newsletter circuit pretty fast think particularly important piece because pitch trimming critical adjustment Glider Ben top pilots southern California always finishes high Southern California Soaring Clubs season points standings knows whereof speaks Talk about trim Sailplane youll wind up numerous articles like hours conversation debate perhaps few really good ideas So good articles have written about trim plane wont go too much detail except clear up few myths misunderstandings find good article share new pilots field clue talk about aft CG dive tests two things can change pitch trim plane move center-of-gravity CG changing nose weight varying decalage angle angle between wing horizontal Continued page 163 FOR ATES WE HAVE OVER 26 YEARS EXPERIENCE IN RC AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 visaBJrn/c ELECTRONICS ya pa. pads made WV IIUdUUWU ,,iactt Ready fly easily fits backseat car Offers solid higplane performance Its small plane flies like 40l $4996 Accepts standard-size servosList Wingspan 34 inches 288 square inches Weight 7 ouncesbare airframeSee hobhy dealer fIrst Ithe doesnt 22 26 ouncesready fly glow poweredstock NAPPER tinier direct 33 38 ouncesready fly electric poweredInclude $250 S&H direcf orders ADAt aii Avanti Conquest VI Conquest 120 Cursor Desire EU-iA Eclipse Fresh Aire Krier Kraft Jekyll 60 RIC City EL lull 11116 AJA*Ja Jekyll 120 LA-i Phoenix 8 Phoenix 8/45 Punch ESkybolt Summit Ill Sundowner Worlds Finest Fiberglass Products Typhoon 96 Railroad Ave #FVortex Suisun Ca 94585 707-428-3119 FAX 707-421-2336 MASTERCARDNISA ACCEPTED LAJNUULbI VI Wing Span 66Weigfht 80-85 Lbs Wing Area 840Engine 60 SKYBOLT Wing Span T/77 8/66Weigfht 20-25 Lbs Wing Area 1625Engine QUADRA want accomplish something new exciting new project undertake Next issue Ill show commercially available pilot kits Sport Fun Precision Scale models Ive just touched whats available stay Theres so-o-o-o much see Dynaflite P-51 totally framed presently being covered little luck columns next installment should bring photos final changes models construction Til build straight fly safely Letters Editor Continued page 11 likes model better own hes nice man heck good designer simple airplanes Litespan also joy work Bill Caldwell Dallas Texas Continued page 200 RC SoaringlBlakeslee Continued page 79 tail Both must considered trimming dive test does Know what trimming Are novice trimming max stability expert going after performance Also know trimming do-it-onceand-forget-it process takes months fine-tune plane change will usually affect something else another reason stick plane competition flying Think decalage angle longitudinal dihedral borrow phrase Martin Simons dihedral means stability along nose weight forward CG stabilizer drag Reduce decalage angles increase performance center-of-gravity can moved aft Stab drag reduced plane responsive control inputs thermals wind gusts ie difficult fly novice just fine experienced pilot dive test will give idea much decalage have letting see planes response increasing airspeeds Dive plane 450 nose down sufficient altitude release transmitter sticks see what plane does recovers pulls out dive rapidly itself plane has high degree pitch stability horizontal stabilizer set relatively large angle relative wing thus forward CG needed counteract large down force exerted stab setup perfect novice gets dive increasing airspeed forces tail down nose up gets nose up mistake decreasing airspeed will allow tail come up nose go down An expert flier will want trim setting produces gradual dive recovery no recovery allthe plane just continues straight dive dive angle increases itself Glider tucks under youve gone too far Changing decalage angle easy Continued page 166 Time Classicin 1/5 scale Wood Beech D-18/C-45 114 Span twin Q35s G38s $40 Compact Giant 1/7th Scale P-47 Thunderboh 70 Span 90-120 G-23/Q35 $25 Construction 1st New Series! P-Si Mustang 100 Span 3 Cu up gas power $32 RACER! Fiberglass Components Canopies Available plans complete kits Plans Prices Include UPS Nick Ziroli 29 EDGAR DRIVE SMITHTOWN N Y 11787 516 234-5038 Illustrated Catalog $200 May1992 163 FYLL Wing Span 66Weigfht 80-85 Lbs Wing Area 770Engine 60 ULIH Wing Span 66Weigfht 85-90 Lbs Wing Area 920Engine 120 YI-HOUN Wing Span 73Weigfht 85-95 Lbs Wing Area 1000/900 Engine 120 B-25 Mitchell101 .$3800 Ju-878 Stuka100 .3000 DC-3/C-47140 .4200 F4U Corsair93 .3000 PT-17 Stearman 77 2700 P-40 Warhawk94 .3000 AT-6 Texan101 .3000 F8F Bearcat86 .3000 A6M5 Zero91 .3000 Fokker Dr-I63 .2700 Semi Scale Taube 500 AEROSPACE Composite Products EZ-VAC KIT Electric Vacuum Bagging System Youve Wanted Try What WAITING For? EZ-VAC Bagging System gives everything need start making PROFESSIONAL quality vacuum bagged parts.includes electric pump bagging tube breather felt Quick-Lock bag seals vacuum bag connector hoses ONLY $7500 Add $400 Shippina& Handling Calit Residents add7 3/4% Tax Overseas orders add 10% Visa MIC COD Check Money Order Aerospace Composite Products PO Box 16621 ne CA 92714 50-1107 FAX 714 250-0307 full-flying stabilators Just move trim lever servo arm clevis reset neutral position computer transmitter fixed stabilizer movable elevator reduce decalage put shims under leading edge stab trailing edge wing As temporary last resort just move neutral position movable elevator transmitter trim lever add turns elevator pushrod clevis next time see tail plane dragging dont assume its tail heavy Theres lot trimming just adding weight nose trimming Just add bit Bens article usual procedure start new Glider safely noseheavy ie plans show CG evn little ahead gradually remove nose weight dont epoxy too much start withit may hard get out adjusting decalage angle same time remember Gliders perform like champs flying lift conversely good Glider looks like dog its sink Therefore time remove nose weight need fly Glider around straight level sufficient number flights make sure youve adjusted stab what looks its best setting neutral air will have course also sampled good badmainly badair during flights Once stab setting seems give optimal glide ratio neutral conditions dive test As aside Glider wants turn left right dive test indicates something warped out alignment Fix before proceeding As Ben said moving CG rearward improves Gliders performance sensitivity lift increased instability meaning its prone stalling may disconcerting first need trim liking keep mind working toward fairly straight dive test goal keep sooner later youll come Gliders optimum CG stab setting Make sure stays means making sure loose nose weight cant move fiddling elevator trim time having rock-solid zero slop stabilator/elevator pushrod system using best-centering servo can afford see ship start doing impersonation rock know its bad airwhich course calls scooting out ASAP other hand tail comes up ship starts dancing like Fred Astair know its thermal time. go core sucker other thing As get close optimum trim settings youll find small changes make big difference Initial trim adjustments pretty obvious final ones 166 Model Aviation ULTIMATESPORT RC 255 Eat Ahtand/PO Boo 727/Soda Springs Idaho 83276 b2055472742ForFrrhrI,faSclSASE SIPS can quite sensitive Pitch trim can seem vary day day Ben said takes long time trim out contest-winning Glider Ive heard fliers going out daybreak fly perfectly calm air test trim Gliders Im prepared go far get picture Are no limits unscrupulous among us will go gain competitive advantage About Veneer Wing Skins Asher Charmichael want thank friend Asher Daphne Alabama taldng time write very complete article use furniture-type wood Continued page 168 77Wirg5ponIO255qhrrhal 1a161bFIenoWaiohrGloFoa&Coorl Foanr FIyiogS,rfac AIacr LondiraGeor CIaarCanopyAroIohIa BcIdar Km 5255 Sfard 00 $3O5Oaloaa Sheered Kir $405 r i ~1 iij yg ADAPTOR THROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & [L1IUK A__ OTO 5132 CAPTOfTALIY DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL R PM NO 501 ADAPTOR KEYLESS CHUCK$1895 DREMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCI STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUtTING PLASTIC WOOD SOFT METALS LEXAN PLEXIGlASS & ETC AVAILABLE IN 006008 010 012 014 016 018 020023 025 028 032 THICKNESS V OUTSIDE DIAMETER 0 $675 EA NO 503PXO14X1I4SAW$600 NO 502ARBOR$600 OUR SAWS ONLY WORK W[FH OUR ARBOR MICRO SELF-STARTING TORCH No coed thor matches Just press Piezo Self-Starling botton Sorns 2370 op 3 hOors micro size adjustable flame Operates steodard cigarette lrghter botane refillable Tank fits comfortably palm poor sand aed made hrghmmpact rebber allows safe non sirp comfortable grip Sopplied can butane MT775 Blow TorchS3S05 rails car buranel MT771 Butane 5 oc5600 EASTERN TOOL& SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1008 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 COD ADD $500FAX212-925-1010 Buy 4 VIPEOS FREE t 412-1SCALEUASTERSLAS VEGAS 91 0SAA USWBASRUn$1995 #11 -1 NW1L3CAL5IASTERSAEROOROUE WFUEVIEW I0 VlSIT WIDARPARSONS 1NWSSWIMECMAWS NUts31995 4#ifl Tsp Gun W Palm Och Ft SM Las Vegas W II .Mxdel tsps2 Nra .S1895 fl 90 Scalemasters Champs Ireing TX hidbey fsl Scalemasters an Diegs Aersspace Mus 2 $1985 90 N W Intl Scalemasters Farragut Park-Athol ID Champlin Fighter Museum wlLoc Proctor W Seaplane Champs a Monica Mus ot Flying 2 Nra $1995 90 Top Gus Iseitational Mesa AZ W Model ExPo2 I-IrsS1995I - 89 Scalemasters Champs St Louis ake Haoasu yjSchneider Cup Races2 NraS1995 -#5 89 US NatIs Scale & Seaplases W Seaplaserp .gCltamps Planes Fame East Mus Moo Oshkosh Visit0 nw/Ralph Beck Chicago Mu Sci & md 2 Nra 595 fl#4- 89 Top Gus Champs Coral Springs FL tor Albatros J9DVA Preeiew atIs Seaplane Site NW lOt ScalemasIers tor N-il Test Flight Bob Martiss R3C ECurtiso Racer2 NraS1gg5 - 87 Las Vegas Scalemasters Champs Proctor Jesny Test Flight calemasters Champs Ft Knox Museum mSig MIg Musesm d Engines tor 11Const & Teat Flight Seaplanes 4 Nra #2 88 Scalemasters Champs Ft Knox Museum Sig Mfg Tour Museum Tour d Engines Proctor N 28Test Flight 88 NW SeaplaseChamps Proctor N-28 Conot n Hanger Toar2 NraS1995 87 Las Vegas Scalemasters Champs tor Jenny lPrototypeTour Proctor Enterpriues ProctorJenny Test Flights U3 82 NW Seaplane Champs 3 Nra 45 Mm 51995 Special Edition Proctor Enterprises Albafrox OVA Brief Cosstr Engine S Radio Install 8 Text Flights -2 Hui $1995 Cuflin JN4D Jenny Plans -FUN SCALE 100 inches 1804 sq 11 lbs 8 sheets m/isstructiosu $1995 10807 SE STACY CT PORTLAND OR 97266 PHONE 503 653-2578 PAL & SECAM ORDERS ENTERPRISES 17 MILPERA CRESCENT WANTIRNA VIC 3t52 AUSTRALIA sf 3899 BETA SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb Shipment total COD add $395 Foreign Orders Parcel Post Air $495 o 20% Subtotal US Mail $495 plus 10% Subtotal CENTURY 0 JET MODELS INC 8 Martha Ct Sumter SC 29150 803 775-6491 RETRACT SELECTOR SPEED CONTROL VALVE 8305 Regency Woods Way Louisville KY 40220 502 491-4114 Four Infinite Adjustment Screws 2 U ann 2 vown Compatible air system Dim 3/8s ls 1-1/4 $2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings planal instructions Intake/Exhaust System eac F-100 F-100 Hun basic kit $18999 P&H 118 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy build Removable wing Length 59 F-105 Thunderchief basic kit $23900 P&H Length 73 1 Engine No Cheater Hole F-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 90 vable 61 Wings LE/TE flaps Deluxe kit DC wood I/B pylons CP kit plus morel Landing gear tires brakes available veneers wing skins technique fairly new US Im sure readers will interested learning about Unfortunately Ashers article too long fit column because includes much good information didnt want cut down So Ill print half month rest next month Over Asher Ive built about 10 Sailpianes last six years Ive tried lot different building techniques method its devotees detractors years choice rib-and-spar foam-andbalsa wing construction COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREE lete Air System Stainless Torque Links Installed - Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 110 retract angle Over-center lock down * Nose gear available $27500 pair P&H Wt 15 lbx I5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow kC Ziroli Bud Nosen pius Choice 91 Plyon Winners Handles 20-25 lb aircraft 84-97 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair Wt 22 oz products proudly MADE IN THE USA first foam-and-balsa ship Windsong After building sold foam-and-balsa covered Black Baron film after five years still serves well Sure have break out heat gun iron once twice season inevitable bubbles loosening edges Song well other planes seemed part bargain easy-to-use film covering flying buddies said Switch film wont bubble So did did quite bad still bubbled Now youve got understand tend little obsessive comes airplanes look demand well-built clean functional ship LET WATER FEVER TAKE YQI OVER Fuselage Length 45 Rec Engine Size 40-60 60-80 4 Stroke Flying Weight 5-6 lbs Wing Span 60 Area 630 sq Radio Channels 4 WRITE TODAY FOR YOUR FREE COLOR CATALOG PO Box 458Oakwood GA 30566404-532-6401 MADE IN THE USA 168 Model Aviation EXPLORE THE ADVANTAGES OF WATER FLYING WITH THIS SUPER INTERMEDIATE TRAINER few dings dont bother much especially put myself during flying session Hanger rash bothers little dings bubbles appear result materials products used look something help eliminate problem finally came conclusion balsa too soft skinning wings film required too much maintenance taste wanted something different goal wings didnt succumb fingernail abrupt stop wall wrinide under heat sun good hard surface film covering also lightweight would trick So set about experimenting spent lot money following items vacuum system phone calls foam wing cutter per Julian Tamez phone calls videos phone calls sample materials phone calls resins cloths phone calls Most money spent phone calls would ask thousand different answers reasons reply Youve got glass wings over blue foam Use weight cloth layersno dont use kind foam its porous enough Wow thought everybody going through same thing Im going through finally dawned everybody little different slant achieve end result wanted wings light wings strong wings snap build trueat least objectives purposes sat down started analyzing own objectives wanted set wings following characteristics light balsa-and-foam wing Thermal Duration events hard surface glass wing help eliminate dings surface compression elimination film covering strong enough zoom best pleasing cosmetically tall order fill No doubt might done exotic composites fabrics such Kevlar carbon-fiber Spectra experiments ran left lot desired terms aesthetics types wings typically require painting achieve consistent surface quality paint quantities achieve opaqueness adds weight decided cutting-edge approach just wouldnt fill bill flying ability characteristics seeking samples constructed way too heavy too fragile built weight required deflaitely expensive constructed exotic materials Its funny obvious answers quests often found right under out noses make living furniture industry have appreciation wood related materials found several people sheeting wings hardwood veneers produced furniture industry began investigate technique After Europeans have using veneer years planes Bob Dodgson Mark Allen switching obechi veneer kits referred gentleman North Carolina name Landon Grindstaff Landon guided through May1992 169 No NITRo on-a uets about 1 minute ounce fuel OPS MAxI 30 18 Statically dynamically balanced 5 intake ports shaft induction roller ball bearings long stroke pump carb readily available parts l8x8TopfightM.8l8Srpm 20x6Zinger8036 rpm 24x8Zinger5730 rpm stock VS parts S P Co#ft1eeii4o% /mo44 %ec K-FtWT INDUSflZUNM -6 lb hUSPAN 5Urn 00O bout op dUb th ohowo 0 p10 61S 622lall ANN SP-301 lUNbgodply Flite Line Support Table Model Maintenance Work Bench Height Flight Line Work Shop Get Plane f Ground. Get Yourself Off Knees Stand Up Work Height36Will Support Over 200 Pounds Large Work Surface32 x 55 Extremely Strong Corrugated Board Light WeightOnly 12 Pounds.18 x3 x 55 Shipping/Storage Box Sets Up Under 60 SecondsPortableVery Stable Set Up $lgg5 plus shipping handling Dealer & Club inquiries welcome Made USA Recycled Corrugated Patented & Pending Center Fold Design Call Today 1-800-235-4844 Illinois Call 708-495-9468 NEWance Inc 1765-H Cortland Ct Addison IL 60101 first attempts using obechi support advice invaluable first set wings came out little too heavy subsequent attempts have met requirements Some following information came directly Landon rest result own findings Up front let say veneer little demanding work balsa Its fragile will split along grain handled carelessly thin ranging thickness / % translates 0020 0027 thousandths ofn inch Because thinness necessary core its fittings spar ribs wiring channel etc smooth flush will telegraph through veneer particularly its applied vacuumbag technique Extra care required ensure smooth surfaces Once place however veneer supported core wing stronger balsa tunes over Any type veneer could used type wood will present its own characteristics veneer form lightest possible wing would constructed light close-grained wood such poplar anigre over 10- l5-lb-density foam core finished couple coats lacquer sanding sealer light application top-coat lacquer type wing would weigh 2 3 oz less per 1000 sq comparable balsa-covered wing film covering surface hardness strength veneer-covered wing would greatly enhanced An obechi wing could finished way obechi open-grained wood Besides leaving grainy surface finish good chance solvents lacquer would leach foam core through pores obechi veneer melt core pretty sight open-grain characteristic obechi has added undesirable effect using epoxy bond veneer core resin will migrate through pores surface wing leave spots can spoil surface depending choice finish problem worsened bag wings rather press simple fix problem seal side veneer will contact core can use butyrate dope sanding sealer Pour some surface squeegee off playing card piece / ply twice wood will effectively sealed sure allow ample drying time before proceeding also helps etch doped surface 150-grit sandpaper improve adhesion between veneer foam surface veneer will curi toward doped side dope cures doesnt seem have harmful effect skinning process sealing process isnt critical close-grained woods need look qualities make informed choice veneer skinning wings choices domestic veneer close-grained vary weight thickness width FOAMAIRE 10 SPAN 3u-d LUb uu-/5 CC POWER74 IN WING SPAN 6-7 LBS 45-60 POWER10 SPAN 19- LD -42 COPOWER 5-10 LB PAYLOAD OPTIONAL SPREADER PLY FOAM AND BALSA WOODCHOOSE 3 OR 4 OH SLOW AND STABLE KIT $26995 SPDKFU$1995KIT $69953 CH $14995 4 CH $16495 SEND $100 FOR CATALOGRT 1 NEODESHA KS 66757 OF SAC KITS AND ACC 325-2821 FREE SHIPPING ON KIT ORDERSTfconecomponv SA/MASTERCARD 170 Model Aviation # 1A'As WE BUILD YOUR HELl TEST YOUR HELl REPAIR YOUR HELl 322 North 7th St 6i ~jl Lehighton Pa 18235 WRITE OR CALL FOR INFORMATION Rubber ne Power Free Flight Display control Line Electric Power RIC Airplanes new Illustrated 32 page tabloid size catalog U5b Canada $100 Foreigh $300 Penn Valley Hobby center 837-A W Main St Lansdsle PA 19446 215- 368-0770 Holly density 35-38 lbIft3 would make absolutely gorgeous wing would almost pure white color hard find widths needed cover typical Unlimited wing Maple 38-42 lb/ft3 cherry 35-38 lb/ft3 can found widths required weight penalty Poplar 28-32 lb/ft3 another choice would meet weight/width requirement prettiest wood world Just keep mind US veneer industry cuts its veneers thicker around /36 /32 thickness conjunction higher-density woods will yield heavier wing possible use thinner paperbacked veneers average / thickness typically require greater care preparing core paper will soak up epoxy add weight have also heard delamination paper backer using lacquer finish Ashers article will concluded next month meantime want check sources veneers two Asher referenced obechi Daves Wood Products #7 Creekpark Ct Roswell GA 30076 Phone 404 642-0645 domestic imported veneer Certainly Wood 11753 Big Tree Rd Rt20A East Aurora NY 14052 Phone 716 655-0206 Scale Slope Fun Fly Scale Glider fans please remember famous biennial Scale RC Soaring event will held year May 29-31 Richland Washington chance spend three days flying Scale Sailplane P55 ship great bunch like-minded people some best slopes LIOHTINO SYSTEMS THE *RED 01 *RED 02 *RED 03 *RED 04 #RED 05 #RED 06 *RED 14 #RED 16 #RED 23 ORIGINALS. Still Best Programmable Flashing Navigation Lights 9V$2495 Strobe Light Ad] Rate 9V$1995 Landing Lights 48V$3995 Mars Rotating Beacon Ad] Rate 9 V$1995 Marine Navigation Lights nonflashing9V$1095 Sky Lights 18 Light Set 9 V$2495 Big Airplane Navigation Lights 9V$2495 Econo Landing Lights brightest 9V$1995 Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER STAMPED ENVELOPE FOR RAM INFO If unavailable locally send check money order full credit card Info cost item plus $400 $500 foreignfor immediate shipment Include full address U PS Sorry no COD Ram 229 E Rollins Rd country Spectators course also welcome information contact Tn City Soarers 2626 Eastwood Ave Richland WA 99352 official hotel Cavanaughs Inn phone 1-800/THE-INNS reservations Internatienal Western Great Race annual cross-country race will held Taft California May 15-17 has put official FAT calendar means representatives five countries compete race will count towards eventual recognition F3H FAT official World Championship event F3J will year So behooves X-C fans support race Get info Myles Moran 10428 Oso Ave Chatsworth CA 91311 phone 1-818/8824867LI responding advertisers mention read about Model Aviation Gasoline fueled Produces 3 foot flame will power planes up 228 mph Designed FUN EASY build home shop about 8 hours using materials already have such aerosol spray can combustion chamber Only simple hand tools needed Both high performance jet engines FUN EASY build STEP BY STEP DETAILED FULL SIZE plan sets complete fuel ignition systems JOIN THE JET AGE sending $995 3hp plan set $1295 7hp plan set both sets $2000 JET ENGINE TECHNOLOGIES 10241 Ridgewood El Paso Texas 79925 Round Lake Beach IL 60073 -KITES FREE COLOR CATALOG Choose over 200 exc ting k tes S unusual & innovative des gns Call write catalog todI59 Into Wind s41-o3143 1408 MA Pearl St Boulder Co 80302 mm RC Slope SoaringlByors Continued page 81 like admire Mr Hinderks ability modeler send him note ask accomplishes some construction techniques Building models scratch commended iI cludes FREE $5 Gift Certificate FREE Catalog FREE Tech Notes Newsleffer 0 FREE Article ReprInt COMPOSITE MATERIALS FOR MODELING APPLICATIONS Unbelievable Periodic Special Offers Fast Same Day ShIpping Send $3 postage & handling CST Dept JE RO Box 4615 Lancaster CA 93539 NAME ADDRESS OFlYSTATE ZIPCOUNTRY LI Composite Structures Technology BUILDING WITH TODAYS TECHNOLOGY May1992 171 3 7 HP PULSE JET ENGINES AVAILABLE