Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. Mighty LOVESONG tripped Lovesong has nearly 26 1 max L/D far best US made glider kit among lowest lowest sink rate according results Selig/Donovan/Fraser Princeton tests mighty LOVESONG mightier ever its max [ID about 14% better other competition thermal gilder design Can really afford fly anything less tripped Eppler 214 airfoil proving killer thermal airfoil 90s puts PIXY CAMANO & LOVESONG farther ahead tips up competition Best Designs Airfoil Performance can buy Send 2 stamps comptete multichannel glider catalog bi-annual newsletter Second Wind now availabte $200 per year Front back Camano Pixy & Lovesong Fleet Rich Kardian MO DODGSON DESIGNS 21230 Damson Rd Bothell WA 98021 206776-8067 CHECK EM BOTH OUT NEW STARHAWK BIPLANE NEW MISS STARHAWK POSTER See your Starhawk Dealer details write Thorpe Engineering Corporation 1715 E Fairfield Mesa AZ 85203 Poster $500 P&H Prepaid yuu diS d SIt uuiiunr ui e LrdLuIi uuIIuw uuiwt CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set today See Dealer Cataloger Order dent carry 5qaare Cat Teem call pay fur call well pay tar uhipping 115 canadal cOD Entra SQUARE CUT Tools 407 254-0516 N Harbor City Blvd Melbourne FL 32935 Dmmlr/Omtrbuor Inquirhm Invited Flor da Resdents Add 6% sales Ta
Edition: Model Aviation - 1990/07
Page Numbers: 76, 77, 78, 79, 80, 181, 182, 183, 184
Top picture author launching Number prototype during early test session clay visible right wing tip later removed stabilizer tilt reduced achieve 50-sec circles Above Two prototype BoomBoxes black stripes leading edge wing over webbing made Formatt border tape act turbulators 76 Model Aviation Have ever thought about giving Wakefield Rubber try Give look starter available components its simple fastbuilding competitive EJohn Oldenkamp FIRST CONTESTED 1928 Wake field Cup Rubber-Driven Aeroplanes has long storied past Eventually competition became modern FAI event biennially yields World Champion FiB category Asked list standouts among US team participants anyone whos attuned mystique will mention names like Gordon Light Dick Korda Chet Lanzo Herb Kothe Joe Bilgri Joe Foster George Reich Robert P White airplanes astonishing performance aesthetic appeal competitive challenge gentlemen prime developers event know today Despite attraction abovementioned luminaries Wakefield may everyone Detractors point out event too complex uncompromising difficult mention labor-intensive costly contrary view relative newcomer nothing far aero modeling career has matched excite ment pleasure BoomBox project has generated Theres probably no such thing beginners Wakefield recent develop ments technology elimination builder-of-the-model rule have created near-possibility ARF almost-ready to-fly airplanes Free Flight New prod ucts coming line great numbers cottage industries both abroad Expect flood overseas products East-West trade restrictions loos ened Imports anticipate well seeing soon include wing sets fully finished front ends bulletproof fuselages other ma jor componentsif indeed complete airplanes BoomBox isnt beginners model neither does pretend World Cham pion candidate model intermedi ate step along way Its also very ser viceable robust competitive machine good air dedicated practice BoomBox can winner Two prototypes built mi nor variations detail Number shown plan has safe mod era airfoil modest moments areas built scratch less 30 hours Number two slightly larger area bringing close maximum al lowed rules 2934 sq com bined lifting stabilizing surfaces also has Bob Whites latest wing section thinner stabilizer Other parameters shown plans Though number model appears climb faster pull strongly under power lacks hanging glide sub sequent version because its easier trim original variant has recommen dation learning lab Wakefield large amount sheet balsa em ployed designs sometimes causes colleagues snicker trifle logic system has proven sound over time method involves using wing tail bottom sheeting plan al lows much assembly done off board reduces construction time considerably presents smooth airflow across bottom wing helps model withstand shock DT dether malized landings Ive used construc tion method very satisfactorily through se ries P-30s Coupes Pee Wee 30s fi nally BoomBox Extensive use carbon fiber sheet gives model strength making overly rigid pod-and-boom semifuselage lends quite distinctive out-of-the-rut ap pearance simple-to-build Wakefield Continued page 78 Left Close-up shot showing details motor tube pylon wing saddle boom arrangement dethermalizer line hooked up rear motor peg can also seen Note fully sheeted undercambered wing bottom Right stabilizer its dethermalized p0 sition line rides small piece carbon fiber stab trailing edge keep line cutting structure Note lightly constructed cambered rudder sheet rudder shown plans also will work quite well perhaps very small weight penalty Left The initial stages wing construction bottom sheets cut out marked web rib positions carbon fiber web flange center panel position Stripsof carbon fiber glued trailing edges necessary using firm balsa stock leading edge stock place trailing edge stock displayed Right Construction moves along Ribs glued center panel leading edges Webbing diagonals place tip panel Washout wedges rib angle guides displayed majority construction done off board moves along amazingly fast center tip panels constructed single units separated later stage July 1990 77 Number BoomBox soars overhead glide mode prop blades folded well beyond wing leading edge photo clearly shows models general layout Construction What follows step-by-step guide stead its rundown methods tended get flying field faster ever before starters select adequate amount quality quarter-grained stock bottom surface skins wood should both light straight Look same qualities stick wood too making sure its also medium-weight springy Relatively hard speckly wood best wing ribs 14-15 grams per 3 x 36-in sheet trailII __________ IIIIII __0 VV aw~ zw fte/a# - 0 70 ing edge slices Use regular thin dium gap-filling CyA cyanoacrylate glue joints sure CyA freshest available Stabilizer prefer build component first Measure cut out bottom sheet Sand both sides almost see-through den sity piece plate glass makes excel lent sanding surface Use circular strokes begin finish off along grain Align leading edge attach thin CyA Mark rib locations using drafting triangle soft pencil Use leading edge T-square Also mark placement spanwise carbon fiber bot tom strip Cut glue trailing edge ribs cut plywood template equipped with straight pins protruding sters Zip around outlines common razor blade nip off ends spar indentation using same ra zor ribs will identical will re quire no preliminary sanding Lay partially completed stabilizer now functions plan flat bench Lay down carbon fiber spar flange add ribs precisely along pencil lines Apply horizon tal-grain webbing between rib Final ly install diagonals shown pho tos Now fast enough take breath away did Prepare stabilizer covering sanding top rib contours leading edge shape proper section plate glass support work surface sand ing bevel trailing edge Block sand webbing its straight level rib tops Install turbulator spar upper external carbon fiber spar cap directly over webbing Sand tips flat before add ing punk-soft balsa stabilizer ends rounding nicely bottom top Carbon fiber sheet used BoomBox marvelousand lightweightway build stiff dependable structures must however prepared laid up carefully order avoid debonding under high stress associated turbulent air violent dethermalizing accidental bumps etc very good glue working car bon fiber PlC Products Plasti-Stic see April 1990 RC Soaring column Model Aviation give 100% recom mendation prepare carbon fiber sand both sides material #220 paper Cut planned shape width length using straightedge razor blade desired 003- 006-in-thick stock may beta pered lengthwise applying drafting tape both sides avoid blade skidding Its ad visable wipe material down ace78 Model Aviation Above Number prototype wind ing stooge blast tube extractor winder other accessories shown special shelf built author Below Tools trade Winding aids top 3/ music wire extractor blast tube scrap PVC irrigation pipe stuffer stick serting motors Simplex winder L Wilder winder R %2 wire latching tool Pis erchio front hub two hold pins flags shown PAl winding stirrup Full-Size Plans Available Page 194 ----I____ AK AKVK 4#769~M IIII____ __II__ IIII IIII IIU IIIII VNAN\ / o M BOOM BOX WAKEFIELO DESIONED/ORAWN FOR MODAL AVIATION BY tone just before gluing place ensure secure bond Other few caveats carbon fiber sheet very nearly mir acle category Rudder Two versions shown plans prefer cambered type since sists keeping good nose-up level power pattern initiating left glide sheet balsa version will just fine use latter remember thin out aft area al low tweaking need cambered rudder section 4% Sim plex airfoil ribs cut length plain template webbing spar inlets eyeballed place very nar row 003 carbon fiber cap installed over webs once structure sanded per fection first Wakefield project means go simpler sheet rudder wing heart maybe soul BoomBox take little care Prepare accurate rib template com plete pin registers previously de scribed Cut out ribs sort best-quality wood will placed middle stress generated Make up bottom sheets stabilizer Add leading edges mark locations ribs carbon fiber bottom flange Glue down flanges spanwise Add trailing edge stock us ing relatively dense wood Position glue ribs leading edge Theres no need pin down sheets make sure use waxed paper underneath during operation polyhedral ribs set proper gles using templates shown plan center section tips built joined units point Set both up vertically such way wont move reglue rib/leading edge joint medium-thick CyA Accelerator can used speed things up wing off board glue al ternate ribs bottom sheeting hand feeling fitting other dis penses glue Make sure position ribs exactly predrawn chordwise lines Install webs using A-in balsa stock four center bays /16 stock out tips Keep grain lengthwise Contour sand ribs leading trailing edges Install single spar establish correct polyhedral razor saw sections apart block sand ends good test fit block correct di mensions rejoin sections CyA narrow approximately 3A6 piece 003 carbon fiber installed center joint Left Adhering bottom sheeting undercambered ribs structure oft board len nana presses sneeming ribs right hand applies glue Note already-Installed carbon fiber web flange Right wing rudder stab structurally complete ready covering Carbon fiber caps place Note carbon fiber dihedral brace set against webs center break July 199079 Ut V 4 0 nOR. 2N99O brace webbing side Install diagonals end-to-end tips will need shored up wedges provide /6 maximum washout Washout can also added after covering should choose use diagonals op tional washout left main panel should have added trailing edge glued on later soft balsa wing tips can now added sanded nice curved upsweep can just easily omitted no great performance penalty Prepare glue place top carbon fiber flanges over webbing Doublecheck integrity very important joint ripples appear reglue Plasti-Stic Finally check irregular ities surface sand smooth wing stabilizer rudder should now covered doped rest project moves along Cover both sides structure using traditional nitrate-dope-precoat-and-stick-down-with thinner method Spray lightly rubbing alcohol allow dry Finish four coats thin nitrate dope sanded lightly tween coats Set aside cure semifuselage piece cake Pre pare motor tube sanding lightly Cut tube length attach scrappiece doubler rear using white glue Pour nitrate dope slosh around tube lube protection Sand both ends cleanly cover tube either light 56 oz/yd glassfiber cloth silkspan Seal three coats thinned nitrate dope dry sand tube smooth set aside Plug small end Bradley tail boom soft balsa square up larger end sanding block Make pylon/wing mount three pieces -to 06-in-thick balsa angled end pieces vertical grained Round front before cutting top fit undercamber curve Whittle V shape top ac cept center polyhedral angle Cut out plywood wing rest Partially slice through bottom glue proper bend before attaching roughed-out pylon fore aft plates similarly fabricated hard balsa /2-in-dia wood dowel wrapped sand paper will neatly contour fuselage mat ing surface bottom pylon Wrap sandpaper around motor tube run short front shoe over establish its mating contour Dope cover structures either glass cloth silkspan Punch holes fore aft accept A-in wing hold pins can made bamboo kitchen skewers cut length Carefully test fit glue pylon unit boom Add stabilizer platform mask off necessary paint py lon stab platform Using two three coats Krylon spray colors works nicely dethermalizer associated hard ware should made up installed point fitting various tubes boom scuff mating surfaces em ery board ensure solid glue bond DT system used BoomBox innovation fellow flier Charles Yost consists external closed loop top fuselage stabilizer obviating use restraining line rear mak ing stabilizer on/off movements easy ac complish DT action very positive sure carry along some spare 10-lb test monofilament should line break Propeller front hub Owing very short nose moment design its advisa ble use Montreal stop mechanism keep prop folding over wing causing vertical dive BoomBox features unit handcrafted Bob Piserchio includes spinner front fuselage ring thrust adjustments ground blade hangers pitch adjustment stop nuts hardened rear motor peg Its beautifuland tough beat durability reliability blades laminated very hard 1/6 B-grain sheet balsa form carved JH Maxwell state-ofthe-art pitch distribution described page 76 1988 NFFS Symposium Re port issued National Free Flight So ciety see source list end arti cle blades airfoiled shape covered both sides Sig 56-oz/yd glass cloth two coats K&B finishing resin Cut slits accept prop hangers set fast both thin thick Continued page 181 80 Model Aviation Above Basic fuselage parts Bradley carbon fiber boom Starline phenolic motor tube rear doubler roughed-out pylon grooved fit tubes Right Wakefield prop blades hardware Prom top left Champion blanks authors carved set Superior Schwartzbach pitch block authors Maxwell block Maxwells state-of-the-art block Maxwell blades conventional Z-bar front end BoomBox No Two blades Piserchio hub Polish SPZ-1 front hub solderless Z-bar hub two Louis Joyner blade sets BoomBox front ends blade units shown disassembled laminated carved form covered glasafiber resin slotted accept Piserchlo hanger alu minum studs Carbon fiber shapes cover reinforces slots little 30@ triangle right used eyeball correct pitch eight-inch radius hub centerline D check enclosed Name Street YES Please send me copies RADIO CONTROL BUYERS GUIDE PrIce per copy 612951# 12066 EVisa D Charge credit card Charge II Mastercard Card # Exp date City State Zip Include postage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U S funds Wisconsin residents add 5% sales tax 0110 buzzing multifunction timer New products such As mentioned earlier electric power gaining more accept ance FF power source particularly mo tors get smaller batteries get lighter powerful newer Electric enterprises Hi Line Ltd PO Box 1283 Bethesda MD 20827 run jointly dynamic duo Tom Schmitt Don Srull latest offering wellnamed Mini-6 motor six-watt ready-to-go geared unit capable flying models weighing three five ounces wing areas up 150 sq Ask Catalog 902 details new additions line including plans eight aircraft designed just Electricone Dons fabulous Dornier DO-X six motors 12 props Pharis Models Box 804 Folsom CA 95630 has several new kits Out Nineties includ ing old Ace Whitman-designed Albatross 36-in-span Old-Timer Pharis 30 new P-30 design winglets good news Robin Pharis says Dave Platts terrific Dragon Fly P-30 kit will ready too distant future Readers may remember plane appeared construc tion article April 88 issue maga zine available Full-Size Plan No S85 $4RMcM Pharis kits Ive seen quality products excellent wood top notch accessories Champion Models George Schroedter has new nicely illustrated catalog out too 1990 will concentrating filling kit orders popular Champion Coupe Up Shot Mulvi hill Wake-Up Wakefield Due crease demand in-house designs George has elected carry Phil Hartmans Blue Ridge Coupe de Ville Square Eagle year Both still available Phil through other retail outlets Send George buck catalog also lists stock balsa Champion rubber other FF accesso ties Bostonian boggle new rules proposal cycle 1990 has just announced AMA means time right little fixing up newly adopted Indoor Bostonian Cabin rules seems certain amount consistency between intent new rules what actually showed up rule book dont think tell whether biplane legal Bostonian Cabin square inches allowed wing about lifting bodies Are legal What about windshield area vs projected area arent questions Theyve come part country Lets see cant fig ure out what doing before next rule book printed Bostonians great event experimentation doubt need shrunken version Manhattan Cabin locked AMA rules BoomBox/Oldenkamp Continued page 80 CyA plus accelerator Cap hangers small pieces carbon fiber sheet Final gloss three thin coats Krylon Crystal Clear #1301 spray An almost instant front end BoomBox propeller 26 inches di ameter set 300 eight inches center pulls like Belgian draft horse event dont want carve own pitch block lay up propeller sources several suppliers ready-made prop blades hubs listed end Final assembly Scuff boom rudder tach area carefully install rudder boom centerline aligned pylon vertical sight line Drill motor tube rear peg Install 40-gram 28strand FAI Model Supply tan motor Hook up prop unit motor tube blades folded Strap wing stabi lizer DT system flight bands drafting tape assemble motor tube boom following plan dimen sions Suspend model string set 75% root chord 375 ensure balance dead-level fore aft adjust tape slide motor unit until its balanced Mark forward point July 1990 181 Kaimbach Publishing Co PO Box 1612 Waukeeha WI 53187 PIPER TRI-PACER 2022 span Plans 5 HD FG Cowl 0 Partial kit 5 Alum bar stock machined wing strut fillings $4000 12 piece set buy sell build Custom Craft Scale RIC Aircraft TRUE HAPPINESS IS BUILDING AND FLYING PIPER TRI-PACER Send check Carl V Miller 130 Yucca Drive Sedoaa AZ 86336 282-4810 [ 1st US RIC Flight School Stop Crashing Start Learning CLASSES FILLING FAST Info peck $300 I1st US RIC FLIGHT SCHOOL 521 S Sawyer Shewano WI 54166 I171515242985 pylon disassemble units Scuff bottom boom motor tube mate block jig com ponents correct alignment very care fully spot glue together CyA really dicey operation constructing model must done extreme care achieve absolutely per fect alignment happen miss mark apply CyA debonder start over again Fortunately havent to date Final assembly preflight checkout Add thick glue filleting boom meets motor tube mask off boom paint motor tube letting overspray add opacity pylon unit Again Kry lon colors highly recommended prefer gloss finish add topcoat Kry lon Crystal Clear After paint dry firmly glue front nose collar thick CyA epoxy Make sure mating surfaces thor oughly scuffedit will come loose prop fold shock otherwise point take break Make sure everything inven tory rejoice over about-to-belaunched marvelous flying machine Check warps misalignments DT binds Verify dethermalizer snuffer tube has nice fat flare lest burn up whole works stabilizer should flat end-to-end wing should have equal washout tip plus either op tional left panel washout overall /16 washin right main panel Make sure correct before proceeding Check downthrust right thrust Youll need bit shown plan possibly Incidence should specification well Weigh air plane Youll probably about six 10 grams shy magic 230-gram mini mum including motor bands hard ware etc Make up sheet-lead weight smoothly contoured tape mo tor tube 75% balance mark Are national numbers flag name address affixed point tip two about warp ducement removal might worth men tioning technique first suggested Lee Hines Nordic fame Ive simply brought up date Locate offending area area want add either washin washout Wrap least three layers paper towels microwave variety ing best Tape seam Boil some water teakettle its whisfling hold component over sink pour boiling water directly onto paper towels Allow seep through towel ing Remove toweling soon its cool enough handle Apply required amount twist structure walk around cool breeze several minutes warp removedor set forever method looks sounds aw ful works Flying big day arrives take heed following utterly astounded fast modem Wakes move much room eat up under glide testing Make sure flying space adequate Test glide model least two dozen times make certain have no un wanted stalling diving overly tight turns lurking before power testing phase begins Make corrections judi cious shimming regliding until its right Ideally plane should run out smoothly turn somewhat left no ups downs satisfied wind 100 turns motor Holding model launch po sition dont launch let prop unwind observe fold folds properly wind 15 turns Launch airplane smoothly evenly dont throw Good flight Wind 175 turns next stalled Add downthrust shim No glide turn Tilt stabilizer slightly time youve reached 250 turns things will getting pretty lively would helpful veteran gumbander along show point Fly air plane 10 20 times before going power especially anomalies appear Work out problems going back low-power testing necessary until an182 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 swer apparent flew prototype its first full-power maneuvers 369 turns un der contest conditions good idea plane did manage max six out eight flights cool breezy weather October 1989 FAI team selection semifinals Lost Hills CAagain 369 turns Postscript BoomBox number three near ing completion incorporates changes aimed optimizing design outlines retained motor tube has lengthened inch accommodate new thinner batch rubber will create tighter motor assuring fail-safe condition prop stop mechanism wing undercamber has creased nominal six percent eight percent top camber USA 5 remains same Shoc-type stabilizer mount being incorporated prevent random prop fold shock pulling stab off its perch new higher aspect ratio prop out line will tried Andrujikov pitch dis tribution Write 3331 Adams Ave San Diego CA 92116 further data formation problem solving Sincere thanks go Robert P White many-time US Wakefield team member World Champion acknowledged mae stro advice encouragement found helpful developing series BoomBoxes Sources Aerodyne 603-B San Michel North Costa Mesa CA 92627 Quality nitrate dope thin ner covering adhesive Bradley Model Products 1337 Pine Sap Court Orlando FL 32825 Carbon fiber tail booms carbon fiber sheet Champion Model Products 880 Carmen Court LaVerne CA 91750 Prop blanks Z bars good tissue balsa kits Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 Glassfiber cloth carbon fiber sheet FM Model Supply PO Box 3957 Tor rance CA 90510 Morrill winders wind ing hooks stirrups FAI tan rubber strip Slick lube Simple Stooge winding aid Free Flight Consultants 5257 Stone Court San Diego CA 92115 Piserchio pro peller hubs motor tube fittings Louis Joyner 3657 Brookwood Rd Bir mingham AL 35223 Precision laminated prop blades several pitches shapes J H Maxwell Aids Advanced Aero medelling 14 Upper Craigs Stirling FK8 2DG Scotland Preformed prop blades pitch blocks sheet wings rib sets order jigs state-of-the-art propeller pitch blocks Model Research Labs 25108 Marguerite #160 Mission Viejo CA 92692 Carbon fiber sheet other composites PlC Plasti Stic glue carbon fiber sheet National Free Flight Society Fred Ter zian 4858 Moorpark Ave San Jose CA p m m m m m m U U I I I I I I I I I I I I I U U U U U U U U U U U U I I I I I I I I 510 GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idie acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives- Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTQUART GALLON $995 % Nitr tha64$25$4i5 140$1395 4Nitrome O5$1595 *61$75$Q95 35% N[tro459525$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPi sobjoot ohooge wthOot nQti See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 I U I I I I I I I I I I I 71 span 58 length 920 sq wing ares 38 oz per sq ft wing loading Weight 14 16 lbs Power 80 108- two cycle 12- four cycle F4U CORSAIR Finished fuselage 062 Aircraft Quality ABS over crutch & ply bulkheads bulkheads including /e ply firewall installed wing design formed ABS Gull covering makes wing snap build Built up tall feathers Complete hardware decals Complete instruction booklet plans 2W1 order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Menlor Ohio 44050 /216 953-1188 U U I I U U U U U U U U U U U U U U U U U July 1990 183 95129 1988 NFFS Symposium Report addition JH Maxwells article State of-the-Art Propeller report has piece Bob White called What Af ter Glue Dries classic Wakefield trimming competitive strategies must-see Starline International 6146 East Cactus Wren Rd Scottsdale AZ 85253 Phenolic motor tubes SPZ-l front end hard ware thermistors thermal detection Superior Props 2412 Tucson Ave Pensa cola FL 32526 Prop blades pitch blocks front end hardware Wilders Model Machine Works 2010 Boston Irving TX 75061 Precision wind ers torque meters custom accessories School/Hendry Continued page 96 kids learning academi cally theyre able see finished producta beautiful fully functional model airplane program getting quite reputa tion inquiries continue come parts country Canada Most inquiries about other areas might repli cate program Denise Elliot An nette Bohs employees Private Indus try Council Lee County Florida visited program firsthand look Ex tremely impressive stated Denise program well run kids thoroughly enjoy what doing obvious learning responses positive its no won der looking forward bigger better summer session 1990 try summer school course model aeronautics school district Happy flying Editors Note Dr Hendry adjunct fac culty member Pasco Hernando Commu nity College instructor Gulf Compre hensive High School active member West Pasco Model Pilots Association information about Pasco County program write Dr William W Hendry Gulf Comprehensive High School 5355 School Road New Port Richey FL 34652 Yaks/Berliner Continued page 104 Reno Air Races opened September 12 1988 first three days qual ifying time trials 28 Unlimited class airplanes hand meant single maximum-speed timed lap around 9171mile nine-pylon course course laid out across 5000-ft plateau bordered 7000-ft peaks Sierra Nevada hell-for-leather roar engines echos back watching crowd Skip Holm flew Joe Kasparoffs No 97 completed lap 11912 aver age speed 417274 mph decade ago would have come close record advances engines airframes have produced amazing speeds piston-en gined airplanes flying circle Lyle Shelton led way 1988 No 77 Grumman Bearcat Rare Bear adContinued page 188 [v32][b-2-10-1-10]]I ICAPI II ASSES Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed I @ $795 plus $2 shipping handling I Lens Colors El Amber El Smoke blue I Cap Colors El Black El White El Yellow El Green El Navy blue El Royal blue IEl Maroon ElGrey EJRedI II El Please send information about imprinting PLEASE PRINTI NameI I Addreuu city StateZip ________ RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NOt SALES PO Box 647 Ravenna OH 44266 L1 184 Model Aviation Nothing Can Match. 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