RADIO CONTROL AEROBATICS DURING EVERY AMA rules cycle National Society Radio Controlled Aerobatics NSRCA surveys its members determine what pattern event rules may need modified added subtracted AIVIA Competition Regulations survey results cany no force law advisory nature intended solely guide NSRCA Rules Committee generates NSRCA-backed rules proposals lobbies against proposals affecting Pattern received other sources Although survey results advisory carry significant weight RC Aerobatics Contest Board Rules Survey best reasons becoming member NSRCAsecond excellent monthly newsletter K-Factor really 40-page miniature magazine devoted entirely Precision Aerobatics can become NSRCA member contacting Secretary/Treasurer Maureen Dunphy 215 Industrial Boulevard Tullahoma TN 37388 Tel [615] 455-0735 Dues $30/year major bargain sit heartily recommend sign up due speed 1996 NSRCA Rules Survey included question submitted several sources about proposal raise maximum weight limit Pattern aircraft 12 pounds AMA classes proposed 12-pound limit didnt draw support needed become official NSRCA proposal vote 40% favor Still believe fact 40% respondents questionnaire believed models needed weigh instead less cause some concern common reason cited favoring higher limit structural integrity specifically structural integrity could achieved use exotic materials construction methods case exotic material doesnt mean rare just means expensive carbon fiber Kevlar end-grain balsa/fiberglass laminate easily found Similarly exotic methods question such honeycomb wing cores also available allfor price real reason recent concern new two-meter span length limit coupled removal engine displacement limits Both took effect 1 January 1996 new Competition Regulations issued survey comments some builders evidently having trouble squeezing under current 5-kilogram 11 lb weight limit new two-meter airframes want relief Others supporting higher limit want use extra pound heavier powerful engines such Moki 18 accompanying heavier engine mounts exhaust systems Whatever reason legalizing practice building heavy Precision Aerobatics airplanes makes less sense making furniture out balsa Im pleased 60% surveyed saw waybut Im puzzled way ears 40% didnt Lighter flies better has model airplane commandment since before twin-pusher era powerful engines available today may have added corollary two havent repealed ancient axiom wont-at least until cheap workable antigravity devices nestled under hobby shop counters Lift equals weight thrust equals drag steady level flight want climb increase lift increasing wings angle attack increase thrust excess needed straight level Im climbing out technical limb basic data new available sources written levels seem agree point aerodynamics being exact science diverge rather rapidly after detail-minded rate-of-climb angle-of-climb equations based basic premise can nail down specifics March 1997 99 pair lovely Summit 120s Bob Noll Bob runs Pro Built Competition Planes Vestal New York gaggle Pursuit 120s belonging L-R John Archard Ernie Meredith Ron Ellis Carl Raichie Evan Chapkis Canadas Brad Schooler L talks over Chuck Smith Billings MT State Championships Chucks Ariel foreground MUSTANG CORSAIR TEXAN FOCKE WULF ZERO fiberglass fuselages foam core wings Carbon fiber and/or Keviar re-enforced needed Scale Warbird Race Association Legal Wing SpanEnginePuce P51 F4U AT6 F/W 190 A6M2 576075/9l42O4stroke 544560/60914 stroke 686075 /911204 stroke 616075 91l20 4 stroke 596075 91l2O 4 stroke $17499 $16499 $20499 $18499 $17999 s/H Prices subject change notice Coming Soon F7F Iigercat336 Cessna Skymaster Bearcat posite Materials Epoxy Systems Keviar Fiberglass Vacuum Bagging Materials Carbon Fiber Foams & Plastics much Q44tO4 p4h4 Working Tomorrows Technology 40 S Camino Seco #415 Thcson AZ 85710 Phone/FAX 520 886-3678 much whatsis whosis airplane fades background aerobatics because primary concern performance vertical flight mode After anything can fly straight up will should able handle 450 line 480 42 line depending sort mistake favor vertical wing totally unloaded ailerons undeflected produces nothing much some stabilization profile drag wing providing useful lift relative planet propeller As practical matter means weight drag now equal thrustbut hover Going up still means providing excess thrust over steady state case lot excess thrust required weight profile drag hanging prop vertical line isnt much leap realize extra gram painted glued bolted nailed onto model unnecessary burden additional ounce minor catastrophe An entire pound well entire pound Skeptics may prove own bodies 30 seconds favorite stair machine pick up two bowling balls thirty seconds easy yourself use 12-pound balls about right ratio Thirty seconds should enough time convince physically fit terminally stubborn 100 Model Aviation ern anyone Scene Plainfield IN 96 Eagles Pattern Contest Some country club LOW FUEL SNIFFER On-board Low Fuel Warning System model airplanes boats cars like Complete System Without fuel tanks $17500 Weight 10 oz Carolina Hobbies 1405 Patterson Road Durham NC 27704 919-596-0143 Low Fuel Sniffer uses real strobe light warn operator fuel low before fuel out strobe light easily seen bright sunny days Send $500 video tape information Several myths half-truths support idea heavier airplanes Heavy airplanes stable turbulence Semi-true far initial gust deflection goes general light airplanes damp oscillation better faster After less mass damp direction Heavy airplanes fly better strong wind corollary above less true Thrust king wind affecting power loading extra weight directly degrades effect thrust Heavy airplanes structurally rigid necessarily fact often flex because increased bending loads Rigidity product good structural design proper material selection workmanshipnot weight per se believe light better heavy getting next model need difficult expensive might save few bucks expensive engine parts higher-nitro fuels article faith building light requires some special talent dont possess secret techniques known few special equipment talent nothing patient commitment special equipment nothing gram scale techniques secret wont longer SIZEUSEPRICE 55221183 552351183 57231183 8221183 63X42388 65 22818385 65X372395 652583395 65X553395 682653395 652683395 72315183 7X415183 725183 728183 756W18395 7X7183 729183 729183 7210183 7252720398 755720395 7828 X 328 .14395 7924305 78280395 78578395 82414288 925298 826258 827226 8X7321395 8X8296 859206 8210288 85254395 85X554395 852855398 85278S398 SIZEUSEPRICE 85 27255 395 852755 206 8625237516 206 9752705 206 875270616S 206 875275S 206 875275891S 3W 875275WS 3W 87527755 3W 875277588S 206 8752775W5 206 875280S 206 &752808N5 206 875295W5 3W 87528255 206 975282568S 3W 8752825WS 206 875285S 3W 875285885 3W 875285WS 306 8752875985 3W 8752875W5 306 8752909188 206 875295W8 206 8752925W5 306 875295888 206 892855 206 882875S 3W 88290S 3W 92416 239 92516 239 926 239 927 239 928 239 929 239 9215 239 95285915 3W 952758S 306 next few paragraphs Some weight can saved selection accessory hardware like wheels axles exhaust systems engines etc general wont amount much weight everything goes modem 120 fourstroke-powered Pattern model engine exhaust system landing gear radio mounts et will fixed within expectoration distance five pounds net Still what canevery gram important Comparably-sized fiberglass fuselages parts different manufacturers similar story will weigh within few ounces other Wing stab cores generally cut 1 lblcu ft density foam Honeycombing wings can save several ounces some price labor handling durability accessories cores fuselage arent place save lot weight go add lightness major causes fat Aerobatics models heavy wood extra glue too much paint Remember paint goes airplane inverse order its relative weight primer weighs the pigment coats next final clearcoat least Its easy leave too much primer surface common method piling extra ounces Dont try coverage primer coats trying fill minor imperfections highlight voids pinholes filled WetSIZEUSEPRICESIZEUSEPRICESIZEUSRPRICE 95275915 30612215W7 70614210 1206 952888S 306122117 7061421117 1206 9528585 3061221187 7W1421216 1206 9825237516 3061221157 7W14212815 1206 92655 206122127 7W1421316 1206 92755 2061221257 7W14213816 1206 9285S 2061221287 7W14213516 1239 9524511 285122137 706142135806 1206 1823 2831221397 7061421406 1206 10x4 262122147 70614214816 1206 1028 262122523758 297144219516 1206 1526262125297706144212161206 15272621252187706144213161206 1828263 12521177W1452148161206 1829263125211877W14521458161206 10218265 12521277061528161206 10524511306 125212577W15212161206 1123206 125213770615211161206 1124206 13264W152121612W 11252W 13274W182138161206 11262W 13284W152148161206 1127206132977061552138161206 1128206 13210770616291206 1129206 132117706162181206 112107706 132128177061621212W 112117706 13213897W162139161206 112127706 132125897W162141206 1121207706 1352971206162148161206 112137706 12521071206162181206 1121477061252115871206185212161206 1152482971352125161206 11521258770613521231612069266R3W 1228397135213516 ... 120615208Mw3W 122729713521416120619278Mw3W 1228297 135214W1612W19297F9w306 12207706 14258120611268Rw306 1228W7706 1426120611276Mw306 122187706 1428120614266Rw1206 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material ContinuallyEvolvingDesign MULTI-BLADE2 ReIIaceIeBIadea SIZEUSEPRICE 18282506 18210 18212122506 1821425W 182162506 25281225W 252102506 20212 2562 202142562 202162562 2121225W 22283162 222151516W 222125531W 222143106 2221631W 2421016W 242121662 24s141662 242181662 2884e0u519-153216 286de6ub22-22506 281a4e9ub224062 2UIadeI1u5240662 MULTI-BLADE 3 Replaceable BIaee 172103305 182103300 192113300 20210133700 28212133702 202143789 212153700 212123750 222104562 Contact local hobby dealer first doesnt have what need order direct RacePro 209 267-1414 March 1997 101 [T-BAR SANDERI 2 RIBS FOR EASIER HANDUNG 2 112 WIDE ALUMINUM EXTRUSION GREAT FOR SAND ING WING RIBS FUSELAGES AND BOAT HULLS ThiJ ABRASIVE ROLLS PRESS-ON 7 YDS 2 112 WIDE JUST PEEL AND ST1CK ON T BAR SANDER OR ANY OTHER SANDING BLOCK J320X 900 # THE MINI DRILL CAP 12 DRILLS 52 TO 74 VSTOREDIN PIN VISE fiae 1ST QUALITY KtKEDPOCKET CLIP HIGHSPEEDSTEEL ____ NO 378 $800 SET MICRO CASSETTE SELF STARTING BLOW TORCH TORCH V2AKS WITH ORENARY aGARETTE UGHTER 2SccFn3000 PERFECT PIN-POINT FLA&E ONOFIc 5AFETV ITC9i TOOL & WINOPROOI SELF STARTING BY PUSHING BUTTON 9 MT772 W/LIGHTER $13 EASTERMSUPPLY CO 148 GRAND STREET NEW YORK COY NY 10013 1-212-226-3749 ORDER FAX 1-212-925-1010 INCLUDE $650 POSTAGE OR 950 COD CATALOG 300 OR FREE win-I ORDER Manufactured Landing Products PO Box 938 Knighta Landing CA 95645 NOW AVAILABLE RacePro Engineering NOW Single piece CARBON FIBER EPOXY Unlimited racing propellers have same APC design Which dominant Unlimited Gold Galveston Madera 1994 Initial sizes available Will 1821619 xi9 20 20 21 21 22 22 23 2 23 24 2 24 25 25 26 26 information call Joe Marine 209 267-1414 Write him RacePro Engineering PO BOX 445 Sutter Creek Calif 95685 Fax 209 267-0923 What makes spinners easy install First need enlarge engine shaft hole predrilled 1/4 size spinner backplates stepped guides help stay perfectly centered Second spinner cone locks onto backplate screwsa much secure method snap together style other manufacturers Great Planes Nylon Spinners come white black red seven sizes 1-1/2 3 require no special adapters very little time effort install look great Don Anderson President Founder Great Planes Model Manufacturing GREAT PLANES NYLON SPINNERS Stepped guides backs/ates 1/4 engine shaft hole make easy drill larger diameter remain perfectly centered Also available strong lightweight Machined Aluminum Spinners sizes ranging 1-1/2 3 nylon inserts fit shaft size drillingand attractive polished finish adds class almost model free brochure location dealer nearest please call 1-800-682-8948 ext 0411W MODElCOOqp DASIbaxe Exwa,etvtbaA GREAT PLANES MODEL OIOTRIBITORS COMPANY PO Dcx 0021COameaior, ILOtO2E-9021 .When buy any4 GreatPlanes hardware oraccessoey items COUPON Details coupon per customer gold rostnicted prohibited Customer pay applicahie soles tao Caoh noise tuna centThis coupon Good USA ponicipotint authorized retailers ot Groot Planes eecluoioe tnrnducts en retal purchases Good through t2131/U7 Retailer InaIruEtians redeem send lois onininul coupon no photocopies accepted olonn win regular Great P/anes nmice payment I wthn 3G days aft en tne eepraton dote shown Deduct cou n nalue 1mm net ieooice yment Pruet ot adequate purchase maybe required L sand off excess primer after filling holes surface should have mottled patchy appearance look like hell plan use translucent base color such yellow shoot light white silver blocking-coat first translucent will give good coverage two light coats Dont try fix surface flaws paintfill live Wet-sand runs dust specks tape lines 500600 grit Scuff rest Scotch-Brite bring back gloss light coat clear Sand off heavy stuff leave light stuff stop gluespecifically epoxy important thing remember large sloppy globs extra resin glue fillets joints thick coats resin laminating cores skins add strengthonly weight undeniable aura poor craftsmanship Wipe excess glue away before decides stay forever like holiday cheesecake Balsa wonderful stuff isnt created equal varies density about 4 lb/cu ft 12 lb/cu ft Wood above 8-9 lb range has no business anywhere Precision Aerobatics model Contest Balsa weighs 4-6 lb/cu ft what want wing sheeting tip blocks control surface facings 7-8 lb wood permissible leading trailing edges use light stuff everywhere own six-year-old airplanes constructed way have 2000 flights normal 120-sized wing skin made 5 lb wood will weigh about 35 grams same skin 10 lb wood will double Multiply four add tips leading trailing edges facings stab rudder skins difference between contest wood bin-grade balsa can amount well over d average model Buy borrow decent gram scale use weight chart included select wood will find hobby shop wood checks out upper end lard curve few shops now stock contest balsa have enlightened establishments area patronize will pay little mail-order price small tariff privilege hand-selecting wood Contest wood available multiple sources via mail route advertise magazine go way order need Balsa organic commodity few pieces will always fail make grade inspected closely Pick A-grain wood grain running straight lengthwise uses including sheeting tips edges facings C-grain cut across annular rings mottled appearance useful stiffness premium use last piece skin aileron area B-grain wood mixture grain types avoid wherever possible because its uneven characteristics years Sig Manufacturing Co Inc has put out excellent brochure called Important Facts About Balsa Wood available free hobby shops Sig Acquire copy education reference Sig also excellent source highquality contest balsa Call 515 6235 154 toll-free number orders 800 247-5008 12 lb/cu ft balsa isnt heavy wood avoid Modem soft mounts transmit less vibration means less structure needed around engine Aircraft plywood weighs 40% equal-thickness light poplar plywood end-grain composite laminate latter much stiffer plywood thickness firewall gear mounting plate can often halved double savings Instead wishing voting legal lead-sleds buy good scale use itfor wood accessories Remember painting airplane sedan Use epoxy like $100/ounce leave 12 lb baisa hobby shop bin Perhaps some nice craftsperson can make miniature doll furniture out t hear stains up just like mahogany EST QUALITY TOP PERFORMANCE COMPETITIVE PRICES ALL ENGINES INCLUDE Sachs Dolmar Cylinder Crankshaft Assemblies CH Electronics heavy duty Ignition system Bosch plug cover year limited warranty parts labor Tapped smoke Waibro carburetor ran ready fly OPTIONAL EQUIPMENT Single baR prop adapter Tilloston . HOuRSS & H $1200 Spin-I Opm Mon-FriPrIces subject IOam-4pmto change Sat & Sunwlthoul notIce Central SId me114 IL AVUNIL EXCELSIOR SPGS MO 84024 818 830-5140 FAX 818 837-3890 104 Model Aviation ner cc, nacheo securely hachplate hen four screws instead just onapptmg on
Edition: Model Aviation - 1997/03
Page Numbers: 99, 100, 101, 104
Edition: Model Aviation - 1997/03
Page Numbers: 99, 100, 101, 104
RADIO CONTROL AEROBATICS DURING EVERY AMA rules cycle National Society Radio Controlled Aerobatics NSRCA surveys its members determine what pattern event rules may need modified added subtracted AIVIA Competition Regulations survey results cany no force law advisory nature intended solely guide NSRCA Rules Committee generates NSRCA-backed rules proposals lobbies against proposals affecting Pattern received other sources Although survey results advisory carry significant weight RC Aerobatics Contest Board Rules Survey best reasons becoming member NSRCAsecond excellent monthly newsletter K-Factor really 40-page miniature magazine devoted entirely Precision Aerobatics can become NSRCA member contacting Secretary/Treasurer Maureen Dunphy 215 Industrial Boulevard Tullahoma TN 37388 Tel [615] 455-0735 Dues $30/year major bargain sit heartily recommend sign up due speed 1996 NSRCA Rules Survey included question submitted several sources about proposal raise maximum weight limit Pattern aircraft 12 pounds AMA classes proposed 12-pound limit didnt draw support needed become official NSRCA proposal vote 40% favor Still believe fact 40% respondents questionnaire believed models needed weigh instead less cause some concern common reason cited favoring higher limit structural integrity specifically structural integrity could achieved use exotic materials construction methods case exotic material doesnt mean rare just means expensive carbon fiber Kevlar end-grain balsa/fiberglass laminate easily found Similarly exotic methods question such honeycomb wing cores also available allfor price real reason recent concern new two-meter span length limit coupled removal engine displacement limits Both took effect 1 January 1996 new Competition Regulations issued survey comments some builders evidently having trouble squeezing under current 5-kilogram 11 lb weight limit new two-meter airframes want relief Others supporting higher limit want use extra pound heavier powerful engines such Moki 18 accompanying heavier engine mounts exhaust systems Whatever reason legalizing practice building heavy Precision Aerobatics airplanes makes less sense making furniture out balsa Im pleased 60% surveyed saw waybut Im puzzled way ears 40% didnt Lighter flies better has model airplane commandment since before twin-pusher era powerful engines available today may have added corollary two havent repealed ancient axiom wont-at least until cheap workable antigravity devices nestled under hobby shop counters Lift equals weight thrust equals drag steady level flight want climb increase lift increasing wings angle attack increase thrust excess needed straight level Im climbing out technical limb basic data new available sources written levels seem agree point aerodynamics being exact science diverge rather rapidly after detail-minded rate-of-climb angle-of-climb equations based basic premise can nail down specifics March 1997 99 pair lovely Summit 120s Bob Noll Bob runs Pro Built Competition Planes Vestal New York gaggle Pursuit 120s belonging L-R John Archard Ernie Meredith Ron Ellis Carl Raichie Evan Chapkis Canadas Brad Schooler L talks over Chuck Smith Billings MT State Championships Chucks Ariel foreground MUSTANG CORSAIR TEXAN FOCKE WULF ZERO fiberglass fuselages foam core wings Carbon fiber and/or Keviar re-enforced needed Scale Warbird Race Association Legal Wing SpanEnginePuce P51 F4U AT6 F/W 190 A6M2 576075/9l42O4stroke 544560/60914 stroke 686075 /911204 stroke 616075 91l20 4 stroke 596075 91l2O 4 stroke $17499 $16499 $20499 $18499 $17999 s/H Prices subject change notice Coming Soon F7F Iigercat336 Cessna Skymaster Bearcat posite Materials Epoxy Systems Keviar Fiberglass Vacuum Bagging Materials Carbon Fiber Foams & Plastics much Q44tO4 p4h4 Working Tomorrows Technology 40 S Camino Seco #415 Thcson AZ 85710 Phone/FAX 520 886-3678 much whatsis whosis airplane fades background aerobatics because primary concern performance vertical flight mode After anything can fly straight up will should able handle 450 line 480 42 line depending sort mistake favor vertical wing totally unloaded ailerons undeflected produces nothing much some stabilization profile drag wing providing useful lift relative planet propeller As practical matter means weight drag now equal thrustbut hover Going up still means providing excess thrust over steady state case lot excess thrust required weight profile drag hanging prop vertical line isnt much leap realize extra gram painted glued bolted nailed onto model unnecessary burden additional ounce minor catastrophe An entire pound well entire pound Skeptics may prove own bodies 30 seconds favorite stair machine pick up two bowling balls thirty seconds easy yourself use 12-pound balls about right ratio Thirty seconds should enough time convince physically fit terminally stubborn 100 Model Aviation ern anyone Scene Plainfield IN 96 Eagles Pattern Contest Some country club LOW FUEL SNIFFER On-board Low Fuel Warning System model airplanes boats cars like Complete System Without fuel tanks $17500 Weight 10 oz Carolina Hobbies 1405 Patterson Road Durham NC 27704 919-596-0143 Low Fuel Sniffer uses real strobe light warn operator fuel low before fuel out strobe light easily seen bright sunny days Send $500 video tape information Several myths half-truths support idea heavier airplanes Heavy airplanes stable turbulence Semi-true far initial gust deflection goes general light airplanes damp oscillation better faster After less mass damp direction Heavy airplanes fly better strong wind corollary above less true Thrust king wind affecting power loading extra weight directly degrades effect thrust Heavy airplanes structurally rigid necessarily fact often flex because increased bending loads Rigidity product good structural design proper material selection workmanshipnot weight per se believe light better heavy getting next model need difficult expensive might save few bucks expensive engine parts higher-nitro fuels article faith building light requires some special talent dont possess secret techniques known few special equipment talent nothing patient commitment special equipment nothing gram scale techniques secret wont longer SIZEUSEPRICE 55221183 552351183 57231183 8221183 63X42388 65 22818385 65X372395 652583395 65X553395 682653395 652683395 72315183 7X415183 725183 728183 756W18395 7X7183 729183 729183 7210183 7252720398 755720395 7828 X 328 .14395 7924305 78280395 78578395 82414288 925298 826258 827226 8X7321395 8X8296 859206 8210288 85254395 85X554395 852855398 85278S398 SIZEUSEPRICE 85 27255 395 852755 206 8625237516 206 9752705 206 875270616S 206 875275S 206 875275891S 3W 875275WS 3W 87527755 3W 875277588S 206 8752775W5 206 875280S 206 &752808N5 206 875295W5 3W 87528255 206 975282568S 3W 8752825WS 206 875285S 3W 875285885 3W 875285WS 306 8752875985 3W 8752875W5 306 8752909188 206 875295W8 206 8752925W5 306 875295888 206 892855 206 882875S 3W 88290S 3W 92416 239 92516 239 926 239 927 239 928 239 929 239 9215 239 95285915 3W 952758S 306 next few paragraphs Some weight can saved selection accessory hardware like wheels axles exhaust systems engines etc general wont amount much weight everything goes modem 120 fourstroke-powered Pattern model engine exhaust system landing gear radio mounts et will fixed within expectoration distance five pounds net Still what canevery gram important Comparably-sized fiberglass fuselages parts different manufacturers similar story will weigh within few ounces other Wing stab cores generally cut 1 lblcu ft density foam Honeycombing wings can save several ounces some price labor handling durability accessories cores fuselage arent place save lot weight go add lightness major causes fat Aerobatics models heavy wood extra glue too much paint Remember paint goes airplane inverse order its relative weight primer weighs the pigment coats next final clearcoat least Its easy leave too much primer surface common method piling extra ounces Dont try coverage primer coats trying fill minor imperfections highlight voids pinholes filled WetSIZEUSEPRICESIZEUSEPRICESIZEUSRPRICE 95275915 30612215W7 70614210 1206 952888S 306122117 7061421117 1206 9528585 3061221187 7W1421216 1206 9825237516 3061221157 7W14212815 1206 92655 206122127 7W1421316 1206 92755 2061221257 7W14213816 1206 9285S 2061221287 7W14213516 1239 9524511 285122137 706142135806 1206 1823 2831221397 7061421406 1206 10x4 262122147 70614214816 1206 1028 262122523758 297144219516 1206 1526262125297706144212161206 15272621252187706144213161206 1828263 12521177W1452148161206 1829263125211877W14521458161206 10218265 12521277061528161206 10524511306 125212577W15212161206 1123206 125213770615211161206 1124206 13264W152121612W 11252W 13274W182138161206 11262W 13284W152148161206 1127206132977061552138161206 1128206 13210770616291206 1129206 132117706162181206 112107706 132128177061621212W 112117706 13213897W162139161206 112127706 132125897W162141206 1121207706 1352971206162148161206 112137706 12521071206162181206 1121477061252115871206185212161206 1152482971352125161206 11521258770613521231612069266R3W 1228397135213516 ... 120615208Mw3W 122729713521416120619278Mw3W 1228297 135214W1612W19297F9w306 12207706 14258120611268Rw306 1228W7706 1426120611276Mw306 122187706 1428120614266Rw1206 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material ContinuallyEvolvingDesign MULTI-BLADE2 ReIIaceIeBIadea SIZEUSEPRICE 18282506 18210 18212122506 1821425W 182162506 25281225W 252102506 20212 2562 202142562 202162562 2121225W 22283162 222151516W 222125531W 222143106 2221631W 2421016W 242121662 24s141662 242181662 2884e0u519-153216 286de6ub22-22506 281a4e9ub224062 2UIadeI1u5240662 MULTI-BLADE 3 Replaceable BIaee 172103305 182103300 192113300 20210133700 28212133702 202143789 212153700 212123750 222104562 Contact local hobby dealer first doesnt have what need order direct RacePro 209 267-1414 March 1997 101 [T-BAR SANDERI 2 RIBS FOR EASIER HANDUNG 2 112 WIDE ALUMINUM EXTRUSION GREAT FOR SAND ING WING RIBS FUSELAGES AND BOAT HULLS ThiJ ABRASIVE ROLLS PRESS-ON 7 YDS 2 112 WIDE JUST PEEL AND ST1CK ON T BAR SANDER OR ANY OTHER SANDING BLOCK J320X 900 # THE MINI DRILL CAP 12 DRILLS 52 TO 74 VSTOREDIN PIN VISE fiae 1ST QUALITY KtKEDPOCKET CLIP HIGHSPEEDSTEEL ____ NO 378 $800 SET MICRO CASSETTE SELF STARTING BLOW TORCH TORCH V2AKS WITH ORENARY aGARETTE UGHTER 2SccFn3000 PERFECT PIN-POINT FLA&E ONOFIc 5AFETV ITC9i TOOL & WINOPROOI SELF STARTING BY PUSHING BUTTON 9 MT772 W/LIGHTER $13 EASTERMSUPPLY CO 148 GRAND STREET NEW YORK COY NY 10013 1-212-226-3749 ORDER FAX 1-212-925-1010 INCLUDE $650 POSTAGE OR 950 COD CATALOG 300 OR FREE win-I ORDER Manufactured Landing Products PO Box 938 Knighta Landing CA 95645 NOW AVAILABLE RacePro Engineering NOW Single piece CARBON FIBER EPOXY Unlimited racing propellers have same APC design Which dominant Unlimited Gold Galveston Madera 1994 Initial sizes available Will 1821619 xi9 20 20 21 21 22 22 23 2 23 24 2 24 25 25 26 26 information call Joe Marine 209 267-1414 Write him RacePro Engineering PO BOX 445 Sutter Creek Calif 95685 Fax 209 267-0923 What makes spinners easy install First need enlarge engine shaft hole predrilled 1/4 size spinner backplates stepped guides help stay perfectly centered Second spinner cone locks onto backplate screwsa much secure method snap together style other manufacturers Great Planes Nylon Spinners come white black red seven sizes 1-1/2 3 require no special adapters very little time effort install look great Don Anderson President Founder Great Planes Model Manufacturing GREAT PLANES NYLON SPINNERS Stepped guides backs/ates 1/4 engine shaft hole make easy drill larger diameter remain perfectly centered Also available strong lightweight Machined Aluminum Spinners sizes ranging 1-1/2 3 nylon inserts fit shaft size drillingand attractive polished finish adds class almost model free brochure location dealer nearest please call 1-800-682-8948 ext 0411W MODElCOOqp DASIbaxe Exwa,etvtbaA GREAT PLANES MODEL OIOTRIBITORS COMPANY PO Dcx 0021COameaior, ILOtO2E-9021 .When buy any4 GreatPlanes hardware oraccessoey items COUPON Details coupon per customer gold rostnicted prohibited Customer pay applicahie soles tao Caoh noise tuna centThis coupon Good USA ponicipotint authorized retailers ot Groot Planes eecluoioe tnrnducts en retal purchases Good through t2131/U7 Retailer InaIruEtians redeem send lois onininul coupon no photocopies accepted olonn win regular Great P/anes nmice payment I wthn 3G days aft en tne eepraton dote shown Deduct cou n nalue 1mm net ieooice yment Pruet ot adequate purchase maybe required L sand off excess primer after filling holes surface should have mottled patchy appearance look like hell plan use translucent base color such yellow shoot light white silver blocking-coat first translucent will give good coverage two light coats Dont try fix surface flaws paintfill live Wet-sand runs dust specks tape lines 500600 grit Scuff rest Scotch-Brite bring back gloss light coat clear Sand off heavy stuff leave light stuff stop gluespecifically epoxy important thing remember large sloppy globs extra resin glue fillets joints thick coats resin laminating cores skins add strengthonly weight undeniable aura poor craftsmanship Wipe excess glue away before decides stay forever like holiday cheesecake Balsa wonderful stuff isnt created equal varies density about 4 lb/cu ft 12 lb/cu ft Wood above 8-9 lb range has no business anywhere Precision Aerobatics model Contest Balsa weighs 4-6 lb/cu ft what want wing sheeting tip blocks control surface facings 7-8 lb wood permissible leading trailing edges use light stuff everywhere own six-year-old airplanes constructed way have 2000 flights normal 120-sized wing skin made 5 lb wood will weigh about 35 grams same skin 10 lb wood will double Multiply four add tips leading trailing edges facings stab rudder skins difference between contest wood bin-grade balsa can amount well over d average model Buy borrow decent gram scale use weight chart included select wood will find hobby shop wood checks out upper end lard curve few shops now stock contest balsa have enlightened establishments area patronize will pay little mail-order price small tariff privilege hand-selecting wood Contest wood available multiple sources via mail route advertise magazine go way order need Balsa organic commodity few pieces will always fail make grade inspected closely Pick A-grain wood grain running straight lengthwise uses including sheeting tips edges facings C-grain cut across annular rings mottled appearance useful stiffness premium use last piece skin aileron area B-grain wood mixture grain types avoid wherever possible because its uneven characteristics years Sig Manufacturing Co Inc has put out excellent brochure called Important Facts About Balsa Wood available free hobby shops Sig Acquire copy education reference Sig also excellent source highquality contest balsa Call 515 6235 154 toll-free number orders 800 247-5008 12 lb/cu ft balsa isnt heavy wood avoid Modem soft mounts transmit less vibration means less structure needed around engine Aircraft plywood weighs 40% equal-thickness light poplar plywood end-grain composite laminate latter much stiffer plywood thickness firewall gear mounting plate can often halved double savings Instead wishing voting legal lead-sleds buy good scale use itfor wood accessories Remember painting airplane sedan Use epoxy like $100/ounce leave 12 lb baisa hobby shop bin Perhaps some nice craftsperson can make miniature doll furniture out t hear stains up just like mahogany EST QUALITY TOP PERFORMANCE COMPETITIVE PRICES ALL ENGINES INCLUDE Sachs Dolmar Cylinder Crankshaft Assemblies CH Electronics heavy duty Ignition system Bosch plug cover year limited warranty parts labor Tapped smoke Waibro carburetor ran ready fly OPTIONAL EQUIPMENT Single baR prop adapter Tilloston . HOuRSS & H $1200 Spin-I Opm Mon-FriPrIces subject IOam-4pmto change Sat & Sunwlthoul notIce Central SId me114 IL AVUNIL EXCELSIOR SPGS MO 84024 818 830-5140 FAX 818 837-3890 104 Model Aviation ner cc, nacheo securely hachplate hen four screws instead just onapptmg on
Edition: Model Aviation - 1997/03
Page Numbers: 99, 100, 101, 104
RADIO CONTROL AEROBATICS DURING EVERY AMA rules cycle National Society Radio Controlled Aerobatics NSRCA surveys its members determine what pattern event rules may need modified added subtracted AIVIA Competition Regulations survey results cany no force law advisory nature intended solely guide NSRCA Rules Committee generates NSRCA-backed rules proposals lobbies against proposals affecting Pattern received other sources Although survey results advisory carry significant weight RC Aerobatics Contest Board Rules Survey best reasons becoming member NSRCAsecond excellent monthly newsletter K-Factor really 40-page miniature magazine devoted entirely Precision Aerobatics can become NSRCA member contacting Secretary/Treasurer Maureen Dunphy 215 Industrial Boulevard Tullahoma TN 37388 Tel [615] 455-0735 Dues $30/year major bargain sit heartily recommend sign up due speed 1996 NSRCA Rules Survey included question submitted several sources about proposal raise maximum weight limit Pattern aircraft 12 pounds AMA classes proposed 12-pound limit didnt draw support needed become official NSRCA proposal vote 40% favor Still believe fact 40% respondents questionnaire believed models needed weigh instead less cause some concern common reason cited favoring higher limit structural integrity specifically structural integrity could achieved use exotic materials construction methods case exotic material doesnt mean rare just means expensive carbon fiber Kevlar end-grain balsa/fiberglass laminate easily found Similarly exotic methods question such honeycomb wing cores also available allfor price real reason recent concern new two-meter span length limit coupled removal engine displacement limits Both took effect 1 January 1996 new Competition Regulations issued survey comments some builders evidently having trouble squeezing under current 5-kilogram 11 lb weight limit new two-meter airframes want relief Others supporting higher limit want use extra pound heavier powerful engines such Moki 18 accompanying heavier engine mounts exhaust systems Whatever reason legalizing practice building heavy Precision Aerobatics airplanes makes less sense making furniture out balsa Im pleased 60% surveyed saw waybut Im puzzled way ears 40% didnt Lighter flies better has model airplane commandment since before twin-pusher era powerful engines available today may have added corollary two havent repealed ancient axiom wont-at least until cheap workable antigravity devices nestled under hobby shop counters Lift equals weight thrust equals drag steady level flight want climb increase lift increasing wings angle attack increase thrust excess needed straight level Im climbing out technical limb basic data new available sources written levels seem agree point aerodynamics being exact science diverge rather rapidly after detail-minded rate-of-climb angle-of-climb equations based basic premise can nail down specifics March 1997 99 pair lovely Summit 120s Bob Noll Bob runs Pro Built Competition Planes Vestal New York gaggle Pursuit 120s belonging L-R John Archard Ernie Meredith Ron Ellis Carl Raichie Evan Chapkis Canadas Brad Schooler L talks over Chuck Smith Billings MT State Championships Chucks Ariel foreground MUSTANG CORSAIR TEXAN FOCKE WULF ZERO fiberglass fuselages foam core wings Carbon fiber and/or Keviar re-enforced needed Scale Warbird Race Association Legal Wing SpanEnginePuce P51 F4U AT6 F/W 190 A6M2 576075/9l42O4stroke 544560/60914 stroke 686075 /911204 stroke 616075 91l20 4 stroke 596075 91l2O 4 stroke $17499 $16499 $20499 $18499 $17999 s/H Prices subject change notice Coming Soon F7F Iigercat336 Cessna Skymaster Bearcat posite Materials Epoxy Systems Keviar Fiberglass Vacuum Bagging Materials Carbon Fiber Foams & Plastics much Q44tO4 p4h4 Working Tomorrows Technology 40 S Camino Seco #415 Thcson AZ 85710 Phone/FAX 520 886-3678 much whatsis whosis airplane fades background aerobatics because primary concern performance vertical flight mode After anything can fly straight up will should able handle 450 line 480 42 line depending sort mistake favor vertical wing totally unloaded ailerons undeflected produces nothing much some stabilization profile drag wing providing useful lift relative planet propeller As practical matter means weight drag now equal thrustbut hover Going up still means providing excess thrust over steady state case lot excess thrust required weight profile drag hanging prop vertical line isnt much leap realize extra gram painted glued bolted nailed onto model unnecessary burden additional ounce minor catastrophe An entire pound well entire pound Skeptics may prove own bodies 30 seconds favorite stair machine pick up two bowling balls thirty seconds easy yourself use 12-pound balls about right ratio Thirty seconds should enough time convince physically fit terminally stubborn 100 Model Aviation ern anyone Scene Plainfield IN 96 Eagles Pattern Contest Some country club LOW FUEL SNIFFER On-board Low Fuel Warning System model airplanes boats cars like Complete System Without fuel tanks $17500 Weight 10 oz Carolina Hobbies 1405 Patterson Road Durham NC 27704 919-596-0143 Low Fuel Sniffer uses real strobe light warn operator fuel low before fuel out strobe light easily seen bright sunny days Send $500 video tape information Several myths half-truths support idea heavier airplanes Heavy airplanes stable turbulence Semi-true far initial gust deflection goes general light airplanes damp oscillation better faster After less mass damp direction Heavy airplanes fly better strong wind corollary above less true Thrust king wind affecting power loading extra weight directly degrades effect thrust Heavy airplanes structurally rigid necessarily fact often flex because increased bending loads Rigidity product good structural design proper material selection workmanshipnot weight per se believe light better heavy getting next model need difficult expensive might save few bucks expensive engine parts higher-nitro fuels article faith building light requires some special talent dont possess secret techniques known few special equipment talent nothing patient commitment special equipment nothing gram scale techniques secret wont longer SIZEUSEPRICE 55221183 552351183 57231183 8221183 63X42388 65 22818385 65X372395 652583395 65X553395 682653395 652683395 72315183 7X415183 725183 728183 756W18395 7X7183 729183 729183 7210183 7252720398 755720395 7828 X 328 .14395 7924305 78280395 78578395 82414288 925298 826258 827226 8X7321395 8X8296 859206 8210288 85254395 85X554395 852855398 85278S398 SIZEUSEPRICE 85 27255 395 852755 206 8625237516 206 9752705 206 875270616S 206 875275S 206 875275891S 3W 875275WS 3W 87527755 3W 875277588S 206 8752775W5 206 875280S 206 &752808N5 206 875295W5 3W 87528255 206 975282568S 3W 8752825WS 206 875285S 3W 875285885 3W 875285WS 306 8752875985 3W 8752875W5 306 8752909188 206 875295W8 206 8752925W5 306 875295888 206 892855 206 882875S 3W 88290S 3W 92416 239 92516 239 926 239 927 239 928 239 929 239 9215 239 95285915 3W 952758S 306 next few paragraphs Some weight can saved selection accessory hardware like wheels axles exhaust systems engines etc general wont amount much weight everything goes modem 120 fourstroke-powered Pattern model engine exhaust system landing gear radio mounts et will fixed within expectoration distance five pounds net Still what canevery gram important Comparably-sized fiberglass fuselages parts different manufacturers similar story will weigh within few ounces other Wing stab cores generally cut 1 lblcu ft density foam Honeycombing wings can save several ounces some price labor handling durability accessories cores fuselage arent place save lot weight go add lightness major causes fat Aerobatics models heavy wood extra glue too much paint Remember paint goes airplane inverse order its relative weight primer weighs the pigment coats next final clearcoat least Its easy leave too much primer surface common method piling extra ounces Dont try coverage primer coats trying fill minor imperfections highlight voids pinholes filled WetSIZEUSEPRICESIZEUSEPRICESIZEUSRPRICE 95275915 30612215W7 70614210 1206 952888S 306122117 7061421117 1206 9528585 3061221187 7W1421216 1206 9825237516 3061221157 7W14212815 1206 92655 206122127 7W1421316 1206 92755 2061221257 7W14213816 1206 9285S 2061221287 7W14213516 1239 9524511 285122137 706142135806 1206 1823 2831221397 7061421406 1206 10x4 262122147 70614214816 1206 1028 262122523758 297144219516 1206 1526262125297706144212161206 15272621252187706144213161206 1828263 12521177W1452148161206 1829263125211877W14521458161206 10218265 12521277061528161206 10524511306 125212577W15212161206 1123206 125213770615211161206 1124206 13264W152121612W 11252W 13274W182138161206 11262W 13284W152148161206 1127206132977061552138161206 1128206 13210770616291206 1129206 132117706162181206 112107706 132128177061621212W 112117706 13213897W162139161206 112127706 132125897W162141206 1121207706 1352971206162148161206 112137706 12521071206162181206 1121477061252115871206185212161206 1152482971352125161206 11521258770613521231612069266R3W 1228397135213516 ... 120615208Mw3W 122729713521416120619278Mw3W 1228297 135214W1612W19297F9w306 12207706 14258120611268Rw306 1228W7706 1426120611276Mw306 122187706 1428120614266Rw1206 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material ContinuallyEvolvingDesign MULTI-BLADE2 ReIIaceIeBIadea SIZEUSEPRICE 18282506 18210 18212122506 1821425W 182162506 25281225W 252102506 20212 2562 202142562 202162562 2121225W 22283162 222151516W 222125531W 222143106 2221631W 2421016W 242121662 24s141662 242181662 2884e0u519-153216 286de6ub22-22506 281a4e9ub224062 2UIadeI1u5240662 MULTI-BLADE 3 Replaceable BIaee 172103305 182103300 192113300 20210133700 28212133702 202143789 212153700 212123750 222104562 Contact local hobby dealer first doesnt have what need order direct RacePro 209 267-1414 March 1997 101 [T-BAR SANDERI 2 RIBS FOR EASIER HANDUNG 2 112 WIDE ALUMINUM EXTRUSION GREAT FOR SAND ING WING RIBS FUSELAGES AND BOAT HULLS ThiJ ABRASIVE ROLLS PRESS-ON 7 YDS 2 112 WIDE JUST PEEL AND ST1CK ON T BAR SANDER OR ANY OTHER SANDING BLOCK J320X 900 # THE MINI DRILL CAP 12 DRILLS 52 TO 74 VSTOREDIN PIN VISE fiae 1ST QUALITY KtKEDPOCKET CLIP HIGHSPEEDSTEEL ____ NO 378 $800 SET MICRO CASSETTE SELF STARTING BLOW TORCH TORCH V2AKS WITH ORENARY aGARETTE UGHTER 2SccFn3000 PERFECT PIN-POINT FLA&E ONOFIc 5AFETV ITC9i TOOL & WINOPROOI SELF STARTING BY PUSHING BUTTON 9 MT772 W/LIGHTER $13 EASTERMSUPPLY CO 148 GRAND STREET NEW YORK COY NY 10013 1-212-226-3749 ORDER FAX 1-212-925-1010 INCLUDE $650 POSTAGE OR 950 COD CATALOG 300 OR FREE win-I ORDER Manufactured Landing Products PO Box 938 Knighta Landing CA 95645 NOW AVAILABLE RacePro Engineering NOW Single piece CARBON FIBER EPOXY Unlimited racing propellers have same APC design Which dominant Unlimited Gold Galveston Madera 1994 Initial sizes available Will 1821619 xi9 20 20 21 21 22 22 23 2 23 24 2 24 25 25 26 26 information call Joe Marine 209 267-1414 Write him RacePro Engineering PO BOX 445 Sutter Creek Calif 95685 Fax 209 267-0923 What makes spinners easy install First need enlarge engine shaft hole predrilled 1/4 size spinner backplates stepped guides help stay perfectly centered Second spinner cone locks onto backplate screwsa much secure method snap together style other manufacturers Great Planes Nylon Spinners come white black red seven sizes 1-1/2 3 require no special adapters very little time effort install look great Don Anderson President Founder Great Planes Model Manufacturing GREAT PLANES NYLON SPINNERS Stepped guides backs/ates 1/4 engine shaft hole make easy drill larger diameter remain perfectly centered Also available strong lightweight Machined Aluminum Spinners sizes ranging 1-1/2 3 nylon inserts fit shaft size drillingand attractive polished finish adds class almost model free brochure location dealer nearest please call 1-800-682-8948 ext 0411W MODElCOOqp DASIbaxe Exwa,etvtbaA GREAT PLANES MODEL OIOTRIBITORS COMPANY PO Dcx 0021COameaior, ILOtO2E-9021 .When buy any4 GreatPlanes hardware oraccessoey items COUPON Details coupon per customer gold rostnicted prohibited Customer pay applicahie soles tao Caoh noise tuna centThis coupon Good USA ponicipotint authorized retailers ot Groot Planes eecluoioe tnrnducts en retal purchases Good through t2131/U7 Retailer InaIruEtians redeem send lois onininul coupon no photocopies accepted olonn win regular Great P/anes nmice payment I wthn 3G days aft en tne eepraton dote shown Deduct cou n nalue 1mm net ieooice yment Pruet ot adequate purchase maybe required L sand off excess primer after filling holes surface should have mottled patchy appearance look like hell plan use translucent base color such yellow shoot light white silver blocking-coat first translucent will give good coverage two light coats Dont try fix surface flaws paintfill live Wet-sand runs dust specks tape lines 500600 grit Scuff rest Scotch-Brite bring back gloss light coat clear Sand off heavy stuff leave light stuff stop gluespecifically epoxy important thing remember large sloppy globs extra resin glue fillets joints thick coats resin laminating cores skins add strengthonly weight undeniable aura poor craftsmanship Wipe excess glue away before decides stay forever like holiday cheesecake Balsa wonderful stuff isnt created equal varies density about 4 lb/cu ft 12 lb/cu ft Wood above 8-9 lb range has no business anywhere Precision Aerobatics model Contest Balsa weighs 4-6 lb/cu ft what want wing sheeting tip blocks control surface facings 7-8 lb wood permissible leading trailing edges use light stuff everywhere own six-year-old airplanes constructed way have 2000 flights normal 120-sized wing skin made 5 lb wood will weigh about 35 grams same skin 10 lb wood will double Multiply four add tips leading trailing edges facings stab rudder skins difference between contest wood bin-grade balsa can amount well over d average model Buy borrow decent gram scale use weight chart included select wood will find hobby shop wood checks out upper end lard curve few shops now stock contest balsa have enlightened establishments area patronize will pay little mail-order price small tariff privilege hand-selecting wood Contest wood available multiple sources via mail route advertise magazine go way order need Balsa organic commodity few pieces will always fail make grade inspected closely Pick A-grain wood grain running straight lengthwise uses including sheeting tips edges facings C-grain cut across annular rings mottled appearance useful stiffness premium use last piece skin aileron area B-grain wood mixture grain types avoid wherever possible because its uneven characteristics years Sig Manufacturing Co Inc has put out excellent brochure called Important Facts About Balsa Wood available free hobby shops Sig Acquire copy education reference Sig also excellent source highquality contest balsa Call 515 6235 154 toll-free number orders 800 247-5008 12 lb/cu ft balsa isnt heavy wood avoid Modem soft mounts transmit less vibration means less structure needed around engine Aircraft plywood weighs 40% equal-thickness light poplar plywood end-grain composite laminate latter much stiffer plywood thickness firewall gear mounting plate can often halved double savings Instead wishing voting legal lead-sleds buy good scale use itfor wood accessories Remember painting airplane sedan Use epoxy like $100/ounce leave 12 lb baisa hobby shop bin Perhaps some nice craftsperson can make miniature doll furniture out t hear stains up just like mahogany EST QUALITY TOP PERFORMANCE COMPETITIVE PRICES ALL ENGINES INCLUDE Sachs Dolmar Cylinder Crankshaft Assemblies CH Electronics heavy duty Ignition system Bosch plug cover year limited warranty parts labor Tapped smoke Waibro carburetor ran ready fly OPTIONAL EQUIPMENT Single baR prop adapter Tilloston . HOuRSS & H $1200 Spin-I Opm Mon-FriPrIces subject IOam-4pmto change Sat & Sunwlthoul notIce Central SId me114 IL AVUNIL EXCELSIOR SPGS MO 84024 818 830-5140 FAX 818 837-3890 104 Model Aviation ner cc, nacheo securely hachplate hen four screws instead just onapptmg on
Edition: Model Aviation - 1997/03
Page Numbers: 99, 100, 101, 104
RADIO CONTROL AEROBATICS DURING EVERY AMA rules cycle National Society Radio Controlled Aerobatics NSRCA surveys its members determine what pattern event rules may need modified added subtracted AIVIA Competition Regulations survey results cany no force law advisory nature intended solely guide NSRCA Rules Committee generates NSRCA-backed rules proposals lobbies against proposals affecting Pattern received other sources Although survey results advisory carry significant weight RC Aerobatics Contest Board Rules Survey best reasons becoming member NSRCAsecond excellent monthly newsletter K-Factor really 40-page miniature magazine devoted entirely Precision Aerobatics can become NSRCA member contacting Secretary/Treasurer Maureen Dunphy 215 Industrial Boulevard Tullahoma TN 37388 Tel [615] 455-0735 Dues $30/year major bargain sit heartily recommend sign up due speed 1996 NSRCA Rules Survey included question submitted several sources about proposal raise maximum weight limit Pattern aircraft 12 pounds AMA classes proposed 12-pound limit didnt draw support needed become official NSRCA proposal vote 40% favor Still believe fact 40% respondents questionnaire believed models needed weigh instead less cause some concern common reason cited favoring higher limit structural integrity specifically structural integrity could achieved use exotic materials construction methods case exotic material doesnt mean rare just means expensive carbon fiber Kevlar end-grain balsa/fiberglass laminate easily found Similarly exotic methods question such honeycomb wing cores also available allfor price real reason recent concern new two-meter span length limit coupled removal engine displacement limits Both took effect 1 January 1996 new Competition Regulations issued survey comments some builders evidently having trouble squeezing under current 5-kilogram 11 lb weight limit new two-meter airframes want relief Others supporting higher limit want use extra pound heavier powerful engines such Moki 18 accompanying heavier engine mounts exhaust systems Whatever reason legalizing practice building heavy Precision Aerobatics airplanes makes less sense making furniture out balsa Im pleased 60% surveyed saw waybut Im puzzled way ears 40% didnt Lighter flies better has model airplane commandment since before twin-pusher era powerful engines available today may have added corollary two havent repealed ancient axiom wont-at least until cheap workable antigravity devices nestled under hobby shop counters Lift equals weight thrust equals drag steady level flight want climb increase lift increasing wings angle attack increase thrust excess needed straight level Im climbing out technical limb basic data new available sources written levels seem agree point aerodynamics being exact science diverge rather rapidly after detail-minded rate-of-climb angle-of-climb equations based basic premise can nail down specifics March 1997 99 pair lovely Summit 120s Bob Noll Bob runs Pro Built Competition Planes Vestal New York gaggle Pursuit 120s belonging L-R John Archard Ernie Meredith Ron Ellis Carl Raichie Evan Chapkis Canadas Brad Schooler L talks over Chuck Smith Billings MT State Championships Chucks Ariel foreground MUSTANG CORSAIR TEXAN FOCKE WULF ZERO fiberglass fuselages foam core wings Carbon fiber and/or Keviar re-enforced needed Scale Warbird Race Association Legal Wing SpanEnginePuce P51 F4U AT6 F/W 190 A6M2 576075/9l42O4stroke 544560/60914 stroke 686075 /911204 stroke 616075 91l20 4 stroke 596075 91l2O 4 stroke $17499 $16499 $20499 $18499 $17999 s/H Prices subject change notice Coming Soon F7F Iigercat336 Cessna Skymaster Bearcat posite Materials Epoxy Systems Keviar Fiberglass Vacuum Bagging Materials Carbon Fiber Foams & Plastics much Q44tO4 p4h4 Working Tomorrows Technology 40 S Camino Seco #415 Thcson AZ 85710 Phone/FAX 520 886-3678 much whatsis whosis airplane fades background aerobatics because primary concern performance vertical flight mode After anything can fly straight up will should able handle 450 line 480 42 line depending sort mistake favor vertical wing totally unloaded ailerons undeflected produces nothing much some stabilization profile drag wing providing useful lift relative planet propeller As practical matter means weight drag now equal thrustbut hover Going up still means providing excess thrust over steady state case lot excess thrust required weight profile drag hanging prop vertical line isnt much leap realize extra gram painted glued bolted nailed onto model unnecessary burden additional ounce minor catastrophe An entire pound well entire pound Skeptics may prove own bodies 30 seconds favorite stair machine pick up two bowling balls thirty seconds easy yourself use 12-pound balls about right ratio Thirty seconds should enough time convince physically fit terminally stubborn 100 Model Aviation ern anyone Scene Plainfield IN 96 Eagles Pattern Contest Some country club LOW FUEL SNIFFER On-board Low Fuel Warning System model airplanes boats cars like Complete System Without fuel tanks $17500 Weight 10 oz Carolina Hobbies 1405 Patterson Road Durham NC 27704 919-596-0143 Low Fuel Sniffer uses real strobe light warn operator fuel low before fuel out strobe light easily seen bright sunny days Send $500 video tape information Several myths half-truths support idea heavier airplanes Heavy airplanes stable turbulence Semi-true far initial gust deflection goes general light airplanes damp oscillation better faster After less mass damp direction Heavy airplanes fly better strong wind corollary above less true Thrust king wind affecting power loading extra weight directly degrades effect thrust Heavy airplanes structurally rigid necessarily fact often flex because increased bending loads Rigidity product good structural design proper material selection workmanshipnot weight per se believe light better heavy getting next model need difficult expensive might save few bucks expensive engine parts higher-nitro fuels article faith building light requires some special talent dont possess secret techniques known few special equipment talent nothing patient commitment special equipment nothing gram scale techniques secret wont longer SIZEUSEPRICE 55221183 552351183 57231183 8221183 63X42388 65 22818385 65X372395 652583395 65X553395 682653395 652683395 72315183 7X415183 725183 728183 756W18395 7X7183 729183 729183 7210183 7252720398 755720395 7828 X 328 .14395 7924305 78280395 78578395 82414288 925298 826258 827226 8X7321395 8X8296 859206 8210288 85254395 85X554395 852855398 85278S398 SIZEUSEPRICE 85 27255 395 852755 206 8625237516 206 9752705 206 875270616S 206 875275S 206 875275891S 3W 875275WS 3W 87527755 3W 875277588S 206 8752775W5 206 875280S 206 &752808N5 206 875295W5 3W 87528255 206 975282568S 3W 8752825WS 206 875285S 3W 875285885 3W 875285WS 306 8752875985 3W 8752875W5 306 8752909188 206 875295W8 206 8752925W5 306 875295888 206 892855 206 882875S 3W 88290S 3W 92416 239 92516 239 926 239 927 239 928 239 929 239 9215 239 95285915 3W 952758S 306 next few paragraphs Some weight can saved selection accessory hardware like wheels axles exhaust systems engines etc general wont amount much weight everything goes modem 120 fourstroke-powered Pattern model engine exhaust system landing gear radio mounts et will fixed within expectoration distance five pounds net Still what canevery gram important Comparably-sized fiberglass fuselages parts different manufacturers similar story will weigh within few ounces other Wing stab cores generally cut 1 lblcu ft density foam Honeycombing wings can save several ounces some price labor handling durability accessories cores fuselage arent place save lot weight go add lightness major causes fat Aerobatics models heavy wood extra glue too much paint Remember paint goes airplane inverse order its relative weight primer weighs the pigment coats next final clearcoat least Its easy leave too much primer surface common method piling extra ounces Dont try coverage primer coats trying fill minor imperfections highlight voids pinholes filled WetSIZEUSEPRICESIZEUSEPRICESIZEUSRPRICE 95275915 30612215W7 70614210 1206 952888S 306122117 7061421117 1206 9528585 3061221187 7W1421216 1206 9825237516 3061221157 7W14212815 1206 92655 206122127 7W1421316 1206 92755 2061221257 7W14213816 1206 9285S 2061221287 7W14213516 1239 9524511 285122137 706142135806 1206 1823 2831221397 7061421406 1206 10x4 262122147 70614214816 1206 1028 262122523758 297144219516 1206 1526262125297706144212161206 15272621252187706144213161206 1828263 12521177W1452148161206 1829263125211877W14521458161206 10218265 12521277061528161206 10524511306 125212577W15212161206 1123206 125213770615211161206 1124206 13264W152121612W 11252W 13274W182138161206 11262W 13284W152148161206 1127206132977061552138161206 1128206 13210770616291206 1129206 132117706162181206 112107706 132128177061621212W 112117706 13213897W162139161206 112127706 132125897W162141206 1121207706 1352971206162148161206 112137706 12521071206162181206 1121477061252115871206185212161206 1152482971352125161206 11521258770613521231612069266R3W 1228397135213516 ... 120615208Mw3W 122729713521416120619278Mw3W 1228297 135214W1612W19297F9w306 12207706 14258120611268Rw306 1228W7706 1426120611276Mw306 122187706 1428120614266Rw1206 Sound Suppression Design High Thrust Efficiency Long Fiber Advanced Composite Material ContinuallyEvolvingDesign MULTI-BLADE2 ReIIaceIeBIadea SIZEUSEPRICE 18282506 18210 18212122506 1821425W 182162506 25281225W 252102506 20212 2562 202142562 202162562 2121225W 22283162 222151516W 222125531W 222143106 2221631W 2421016W 242121662 24s141662 242181662 2884e0u519-153216 286de6ub22-22506 281a4e9ub224062 2UIadeI1u5240662 MULTI-BLADE 3 Replaceable BIaee 172103305 182103300 192113300 20210133700 28212133702 202143789 212153700 212123750 222104562 Contact local hobby dealer first doesnt have what need order direct RacePro 209 267-1414 March 1997 101 [T-BAR SANDERI 2 RIBS FOR EASIER HANDUNG 2 112 WIDE ALUMINUM EXTRUSION GREAT FOR SAND ING WING RIBS FUSELAGES AND BOAT HULLS ThiJ ABRASIVE ROLLS PRESS-ON 7 YDS 2 112 WIDE JUST PEEL AND ST1CK ON T BAR SANDER OR ANY OTHER SANDING BLOCK J320X 900 # THE MINI DRILL CAP 12 DRILLS 52 TO 74 VSTOREDIN PIN VISE fiae 1ST QUALITY KtKEDPOCKET CLIP HIGHSPEEDSTEEL ____ NO 378 $800 SET MICRO CASSETTE SELF STARTING BLOW TORCH TORCH V2AKS WITH ORENARY aGARETTE UGHTER 2SccFn3000 PERFECT PIN-POINT FLA&E ONOFIc 5AFETV ITC9i TOOL & WINOPROOI SELF STARTING BY PUSHING BUTTON 9 MT772 W/LIGHTER $13 EASTERMSUPPLY CO 148 GRAND STREET NEW YORK COY NY 10013 1-212-226-3749 ORDER FAX 1-212-925-1010 INCLUDE $650 POSTAGE OR 950 COD CATALOG 300 OR FREE win-I ORDER Manufactured Landing Products PO Box 938 Knighta Landing CA 95645 NOW AVAILABLE RacePro Engineering NOW Single piece CARBON FIBER EPOXY Unlimited racing propellers have same APC design Which dominant Unlimited Gold Galveston Madera 1994 Initial sizes available Will 1821619 xi9 20 20 21 21 22 22 23 2 23 24 2 24 25 25 26 26 information call Joe Marine 209 267-1414 Write him RacePro Engineering PO BOX 445 Sutter Creek Calif 95685 Fax 209 267-0923 What makes spinners easy install First need enlarge engine shaft hole predrilled 1/4 size spinner backplates stepped guides help stay perfectly centered Second spinner cone locks onto backplate screwsa much secure method snap together style other manufacturers Great Planes Nylon Spinners come white black red seven sizes 1-1/2 3 require no special adapters very little time effort install look great Don Anderson President Founder Great Planes Model Manufacturing GREAT PLANES NYLON SPINNERS Stepped guides backs/ates 1/4 engine shaft hole make easy drill larger diameter remain perfectly centered Also available strong lightweight Machined Aluminum Spinners sizes ranging 1-1/2 3 nylon inserts fit shaft size drillingand attractive polished finish adds class almost model free brochure location dealer nearest please call 1-800-682-8948 ext 0411W MODElCOOqp DASIbaxe Exwa,etvtbaA GREAT PLANES MODEL OIOTRIBITORS COMPANY PO Dcx 0021COameaior, ILOtO2E-9021 .When buy any4 GreatPlanes hardware oraccessoey items COUPON Details coupon per customer gold rostnicted prohibited Customer pay applicahie soles tao Caoh noise tuna centThis coupon Good USA ponicipotint authorized retailers ot Groot Planes eecluoioe tnrnducts en retal purchases Good through t2131/U7 Retailer InaIruEtians redeem send lois onininul coupon no photocopies accepted olonn win regular Great P/anes nmice payment I wthn 3G days aft en tne eepraton dote shown Deduct cou n nalue 1mm net ieooice yment Pruet ot adequate purchase maybe required L sand off excess primer after filling holes surface should have mottled patchy appearance look like hell plan use translucent base color such yellow shoot light white silver blocking-coat first translucent will give good coverage two light coats Dont try fix surface flaws paintfill live Wet-sand runs dust specks tape lines 500600 grit Scuff rest Scotch-Brite bring back gloss light coat clear Sand off heavy stuff leave light stuff stop gluespecifically epoxy important thing remember large sloppy globs extra resin glue fillets joints thick coats resin laminating cores skins add strengthonly weight undeniable aura poor craftsmanship Wipe excess glue away before decides stay forever like holiday cheesecake Balsa wonderful stuff isnt created equal varies density about 4 lb/cu ft 12 lb/cu ft Wood above 8-9 lb range has no business anywhere Precision Aerobatics model Contest Balsa weighs 4-6 lb/cu ft what want wing sheeting tip blocks control surface facings 7-8 lb wood permissible leading trailing edges use light stuff everywhere own six-year-old airplanes constructed way have 2000 flights normal 120-sized wing skin made 5 lb wood will weigh about 35 grams same skin 10 lb wood will double Multiply four add tips leading trailing edges facings stab rudder skins difference between contest wood bin-grade balsa can amount well over d average model Buy borrow decent gram scale use weight chart included select wood will find hobby shop wood checks out upper end lard curve few shops now stock contest balsa have enlightened establishments area patronize will pay little mail-order price small tariff privilege hand-selecting wood Contest wood available multiple sources via mail route advertise magazine go way order need Balsa organic commodity few pieces will always fail make grade inspected closely Pick A-grain wood grain running straight lengthwise uses including sheeting tips edges facings C-grain cut across annular rings mottled appearance useful stiffness premium use last piece skin aileron area B-grain wood mixture grain types avoid wherever possible because its uneven characteristics years Sig Manufacturing Co Inc has put out excellent brochure called Important Facts About Balsa Wood available free hobby shops Sig Acquire copy education reference Sig also excellent source highquality contest balsa Call 515 6235 154 toll-free number orders 800 247-5008 12 lb/cu ft balsa isnt heavy wood avoid Modem soft mounts transmit less vibration means less structure needed around engine Aircraft plywood weighs 40% equal-thickness light poplar plywood end-grain composite laminate latter much stiffer plywood thickness firewall gear mounting plate can often halved double savings Instead wishing voting legal lead-sleds buy good scale use itfor wood accessories Remember painting airplane sedan Use epoxy like $100/ounce leave 12 lb baisa hobby shop bin Perhaps some nice craftsperson can make miniature doll furniture out t hear stains up just like mahogany EST QUALITY TOP PERFORMANCE COMPETITIVE PRICES ALL ENGINES INCLUDE Sachs Dolmar Cylinder Crankshaft Assemblies CH Electronics heavy duty Ignition system Bosch plug cover year limited warranty parts labor Tapped smoke Waibro carburetor ran ready fly OPTIONAL EQUIPMENT Single baR prop adapter Tilloston . HOuRSS & H $1200 Spin-I Opm Mon-FriPrIces subject IOam-4pmto change Sat & Sunwlthoul notIce Central SId me114 IL AVUNIL EXCELSIOR SPGS MO 84024 818 830-5140 FAX 818 837-3890 104 Model Aviation ner cc, nacheo securely hachplate hen four screws instead just onapptmg on
