Radio Control: Slope Soaring

AT LAST able make Tn-Cities Scale Fun Fly last couple years Ive hoping make up Washington tend event thing another has kept making decided year would different would make fun fly no matter what happened turned out skip commencement ceremony San Jose State looking back now think definitely worth Since fellow RC Soaring columnist ron Blakeslee will undoubtedly usual out standing job reporting event will just taking look few exciting hap penings years fun fly Before go further want publicly thank Wil Byers rest Tn-City Soarers have made event such tremendous success over past few years An event like incredible amount work guys kept things running smoothly weekend long havent heard yet Wil rest guys will taking break next year fun fly wont part Slope Soaring schedule events Fortunately though has decided next years Inter national Slope Race will held Im sure Tn-City Soarers will fabulous job ISR have fun fly didnt take long year see everyone going try outdo other mid morning Friday first official day fun fly wind already picked up people loitering around see what going show up Very quickly some truly amazing aircraft began appear pits perhaps incredibleand easiest spot being %-scale Grumman A-6 Intruder brought 4 Left Hal Weber Ed Mason Wayne Stanford pose monstrous 12-ft Boeing B-29 its smaller counterpart Bell X-1 X-1 fit under belly B-29 could separated flight just 111cc real thlngl Right Fun fly organizer WiI Byers numerous oth ers prepare launch B-29 its maiden flight Eagle Butte SurprIsIngly B-29 best-flying planes years event Great job guysl cant wait see what come up next year Below left Ken Stuhr amazingly relaxed buddies pre pared toss off 1/5-scaie Spitfire its maiden flight Larger aircraft like becoming more popular slopes avaIlabIlity powered kits can converted Gliders will help increase trend Below right Slope Soaring News Charlie Morey controls Bob Reynolds Mark Hambieton prepare fIrst launch Toms IncredIble swing-wing F-14 Tomcat After tearing off horizontal stabilizers flight Charlie averted further disaster some great flying healthy dose good luck 50 Model Aviation Radio Control Slope Soaring Mark Triebes 20794 Krelsier Ci Saratoga CA 95070 Ugghhhl Mark Hambietons fantastic -scale Grumman A-6 intruder heaved over side ridge its flight weekend Just about everybody years event trying outdo everybody else think Mark bested beastie DCUs Mark Hambleton Intruder spans about 10 ft just about big enough accommodate small child turned out Mark involved project build fly several A-6s movie Flight Intruder decided build beasts designed twin ducted fans Sailplane flight A-6 say least im pressive Although just bit draggy Intruder still looked fantastic air showed possible fly practically anything slope case anyone interested A-6 available kit DCU talked Mark little found Out addition A-6 has couple other new planes coming Out near future F-14 Tomcat saw prototypes Washington looks great other Rockwell B-l P11 get few details others Marks DCU de signs present upcoming column cant wait till Mark can reached DCU 1556 S Anaheim Unit C Anaheim CA 92805 tel 1-714/535-6969 Just tad bit less exciting bit im pressive A-6 Boeing B-29 built flown members Nampa Model Aviators Idaho Ed Mason Hal Weber Wayne Stanford principals involved fivemonth-long building project B-29 spans 12 ft weighs 25 lb has wing loading about 295 oz per sq ft glass fuselage balsa-covered foam wings B-29 really isnt much different other Slope ship just slightly larger usual maiden flight B-29 Eagle Butte flawless until came time land final approach plane got little slow tip-stalled disappeared behind small knoll made up landing area crowd gave collective groan turned out little premature Superfortress suddenly reappeared fi nally landed some minor damage horizontal stab just first bit incred ibly good luck day As whole B-29 best flying planes present during weekend very stable smooth showed some far-beyond-scale speed As added bonus guys brought along Bell X-l rocket plane could attached bottom B-29 yeah just like real thing dropped flight Ed con trols B-29 Hal standing take over X-1 once dropped B-29/X-1 launched cruised up get little altitude cameras videos ready planes sepa rated almost perfectly Hal got little overexcited elevator control came close reattach ing X-1 B-29 overall separation went smoothly relatively realistic have suggestion Next time guys Continued page 161 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns 0110w batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x fits neatly onooard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit O5/o lOO5/o tailsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3gg5Introductory offer $2~5 APPLIED ErIGIIIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division Research corporation Prices osoject change notice GUNFIGHTERS * POSITIVE FEEL * USED BY TOP PILOTS * FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower HobbiesWorld Engines 6MeterSpecials Ill Fly What Fix CA RES ADD 625% SALES TAX Large Inventory R/C Parts Crystals October 1990 51 VS Sailpianes 163 Komet makes siz zling pass along ridge Eagle Butte plane perfect Fridays strong winds megalift Friday best day Sooner later youll see need Special Fast Turnaround Now Available CALL Frequency Conversion $4000 Includes Crystals Certification Spectrum Ana lyzers Cali brated Test struments UPS US Mail Federal Express COD Mastercard Visa Accepted Send Self Addressed Envelope Brochures RC Slope Soaring/Triebes Continued page 51 should put model rocket motor X- 1 fire up just after separation really go super sonic efforts B-29 crew earned Pi lots Choice Award presented Saturday night banquet vote award went Ken Stuhr gorgeous -scale Spit fire Built Yellow Aircraft kit Spitfire ideal size large slope such Eagle Butte large airplane PSS ships about half its size span about four feet can really cover ground its easy see aircraft times its maiden flight Ken waited about 30 seconds before putting plane through some aerobatics speed runs very pleased planes perform ance Also present VS Sailplanes stable two fantastic Messerschmitt 163 Kom ets flown Ken other friends name didnt catch two Komets seen throughout day ripping back forth along ridge ideally suited high winds big lift addition Ken also seen flying new Zulu Slope ships Its kinda cross between MiG 29 F-14 although truly Scale ship very attractive flew great As soon Ken gets chance send info pack products Ill doing feature entire VS line planes Rotor V-Max etc exciting events weekend flying Bob Reynolds swing-wing F14 Bob working quite some time before heading up Washing ton knew would definitely highlights fun fly Bob spent Friday morning reassem bling F-14 just after painting After much kibitzing adjusting praying etc Char lie Morey controls Bob Mark Hamble ton chucked beast over edge very no ticeable flutter horizontal stab occurred plane pushed through turbulence right next slopea sign things come Charlie trimmed plane worked back forth along slope decided try sweep back wings Although F-14 defi nitely seemed Out trim wings back held configuration short peri ods time swing-wing undoubtedly successful As Charlie became comfortable plane began let speed build up little andyou guessed itback came stab flutter As able slow plane down easily no complications Charlie eventually pushed plane little harder again ey Char lie Whats floating down bottom slope Isnt right stab Now time see plane flew half stab should noted hori zontal stab used taileron elevator ai leron control wing has no control sur faces addition obvious problem hand seemed wind dying bit lift definitely decreasing Charlie able work ridge its worth brought plane back up below top slope couple times before eventually making downwind landing resulted minor damage Great job Charlie Now can go change shorts 84 1204-cycle 90 2-cycle T 200025003000- OPS 18- NEW OS BGX-1 3500 models fill need furs hotdog show-off sport plane Knife edge take-offs flat spins snaps anything can Wing foam Fuselage Tail lite ply balsa Builds quick lands like trainer Flying weight 10 lbs 84 13 lbs 1921 Ohio K r OHIO SUPERSTAR PRODUCTS INC 11376 RIOGEWAY ROADKENSINGTON OHIO 44427 216-223-1950 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin {Duracraft Inc 1007 Ovriiatd Grove 05 Royal Oak 48067 DuraBat 40-size 4-channel aerobatic trainer - JET ENGINE YOU CAN BUILD - IN ONE EVENING NO WELDING OR MACHINING 4 6 HP GASOLINE FUELED Engineers have designed both HIGH PERFORMANCE JET ENGINES FUN EASY build IN ONE EVENING using parts materials YOU ALREADY HAVE AROUND YOUR HOME such AEROSOL SPRAY CAN Only Simple Tools needed -(electricdrill tin snips rivet gun Both engines will powerR/C PLANES .CARS BOATS great speeds produce 3 FOOT FLAME Under $5 build Both plan sets FULLY ILLUSTRATED STEP STEP COMPLETE fuel ignition systems JOIN THE JET AGE sending $12 4 HP plans $14 6 HP plans $20 both plan sets JET ENGINE TECHNOLOGIES- - 10241 Ridgewood El Paso TX 79925 October 1990 161 SPORTOBATIC 79~ 89~ SPECIALISTSINCUSTOMCOX TEE DEE& REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY COMPETITIONACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OFFUEL TUBING THREEBRANDS OFGLOWPLUGS HARD-TO-FIND HA RD WARE OLD TIMER SUPPLIES COILS CONDENSERS NGK& STIlT SPARKPLUGS SILK8 COLORS QUALITYDOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSIONLEADS 1/2A TEXACO PLA YBOYSR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER P0 WER KITS PROPS TISSUEAND OTHER SUPPLIES C YANOA CR YLA TES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $300 STOCK ORDERS SHIPPED WITHIN 24 HRS NEW CARB ROTATION KIT NOW AVAILABLE FOR ALL Q-3540 & 42 MODELS FULL LINE OF ZINGER 23 & 4 BLADE PROPS U S QUADRA RT 1 NEODESHA KS 66757 $100 FOR CAT 325-2821 potential definitely swingwing F-14 some further testing beefing up control system needed before its po tential can achieved Keep up good work Bob award quickest roll rate goes Brian Laird Slope Scale Brian brought up entire flock Power Scale ships including Spitfire MkXIV P-SLD Mustang Zero 109 P-63 FW-190 After watching Brian put planes through paces including great dogfight between Zero Charlie Moreys P-S 1 impressed went out bought FW-190s soon got back California Ill go detail kit Slope Scales other designs later date meantime can get touch Brian partner Paul Masura Slope Scale 12935 Lasselle St Moreno Valley CA 92388 tel 1-714/924-8409 last column included photo short discussion about Aero L-39 Albatros being kitted Vein Hunt Model Airplanes Well Vein made trip out Washington brought few beautiful little ships him airplane looks better person did photos Vein continually sur rounded curious Slopers armed questions cash too bad Vein didnt have kits him could have sold million never got chance see Albatros fly have seen enough airplanes know what goodflying plane looks like impressive thing about Albatros craftsmanship fuselage gorgeous wings stab come presheeted sanding already done its great bargain $175 price tag missed last time con tact Vein Vein Hunt Models 4950 Butternut Trail Juneau WI 53039 tel 1-414/349-8101 Youve probably noticed everything Ive talked about far has Power Scale stuff Well part PSS planes made up majority what present fun fly quite few Scale Sailplanes around high winds Friday no-wind condi tions Saturday made difficult guys fly notable exception Bill Liscomb gorgeous 12-ft-span DG-202 continually seen heard tearing up skies over Eagle Butte Bill forced way Brian Charlies dogfight short time before thinking better landed de cided take over controls Charlies P-Si Another Sailplane caught attention Sal Pelusos immaculate four-meter Discus Roebers Without seeing fly have decided plane will first true Scale Sail plane ever get time money get type flying Dont think minute few happen ings have talked about oniy ones years Tri-Cities Scale Fun Fly have simply taken look what opinion high lights event As said before Byron will taking much in-depth look people planes years event Notes Selig talk Since spending time enjoying food hangar flying fun fly banquet rather doing job taking notes Michael Seligs talk very pleased find following piece Barry Ku rath newsletter Portland Area Sail plane Society Michael Selig featured speaker Memorial Day Scale Fun Fly Richland John Donovan along David Fraser well known RC Soaring community research Princeton wind tunnel covered topic very interesting slide show would like summarize another part presentation Sailplane design Please remember am untrained hobbyist notes based limited understand ing very technical topic first area Sailplane design addressed Mr Selig fuselage design stated area potential improvement intersec tion wing fuselage proposed pylon mount forward portion wing cantilevered pylon would interfere airflow over first 40% air foil said dividing wing half standard plug-in bolt-on systems doubles certain type drag parasitic Another way improve area dramat ically increase chord wing root Next discussed construction techniques relate drag new composite-built wings can have accurate airfoil over full span wing much sharper trailing edge traditional stick-built wings mentioned open bays behind spar add drag creating small vortex rib ad ditional drag little vortices added up becomes significant Another method increasing efficiency sharpen wing tips much like sharp trail ing edge prevents tip vortex roll ing over top wing encroaching area could providing lift creases effective aspect ratio Tip planform angle areas also need improvement Selig sketched front view bird showed anhedral root sharp upsweep tip said Dr Eppler has found angling tips up 250 would about optimum Gusts bumps cause airplanes stiff wings change angle attack undesir able times suggested leaf-spring system root allow wing flex response bumps thus avoiding change angle attack raised some questions about would build such plane would re spond winch launching suggested areas experimentation inventors crowd hope comments accurate re flection Michael Seligs presentation useful creating next origi nal-design Sailplane Great job Barry Some stuff can defi nitely incorporated Slope design especially Slope Racers ginning appear up down coast Sharp vs square trailing edgesPart Just thought safe return pages MA heres yet another piece never-ending controversy about trailing edges comes Ken Kawahara Redondo Beach CA introduces some new interest ing twists concept square trailing edges race cars al car matter possible tt keep flow attached tapered afterbody tail section Wind tunnel testing will show flow separation well ahead trailing edge idealized body shape Truncating afterbody squared-off tail point separation has little no effect drag reduces weight However airfoils use flow 162 Model Aviation IA VERA GES 0 VER 9000 PROPS I! IMMEDIA TESHIPMENTON WSA/MC 0-42 QUADRA 29 HP40 LBS AVAILABLE EITHER POINTS IGNITION OR C D IGNITION should still attached upper surface trailing edge under conditions detri mental effect thickened trailing edge drag has documented Interestingly enough though Gurney Flap Gurney Lip Gurney Angle Iron etc trailing edge both model airfoils race car airfoils significantly increases lift negative lift down-force case inverted race car wing minor increase drag Gurney Flap vertical surface approxi mately 1-2% chord height trailing edge underside airfoil Gurney Flap likely descendant spoiler found trailing edge upper sur face nonwinged race cars spoiler caused increased local pressure region ahead due formation large separation bubble pressure bubble area increased thereby reducing lift remember race cars want positive lift separated airflow reattaches upper edge spoiler gives additional ad vantage being stable over wide speed range very concerned about strength stability razor-sharp trailing edges Gurney Flap provides another interesting alterna tive Ken noted three good references subject Road Vehicle Aerodynamics AJ Scibor-Rylski Race Car Engineering Mechanics Paul Van Valkenburgh Soartech #8 Selig Donovan Fraser am sure end continuing discussion subject trail ing edges continually try ing find advantage against competition keep up research experimentation RC Electrics/Kopski Continued page 55 dude AMA 627 610 623 plus Longest Flight day All-Up/Last-Down Most Aerobatic Most Impressive Farthest Trav eled Get details Boyd OBrien PO Box 7153 Metairie LA 70010 tel 1-504/8355212 Ben Mathews 101 Mulberry Dr tairie LA 70005 tel 1-504/833-5589 [home] 1-504/366-4511 [office] Electric events often take form fun activities such just men tioned above Some meets include formal AMA Electric events although lesser degree latter events fully described AMA Competition Regulations booklet have place about two years columnist would like know what preferences respect Electric events Are fun event person formal competitor about letting know what like Ill sum marize results future column Reader reaction note month includes some misunderstanding ongoing crusade establishment meaningful useful intel ligent standardized Electric motor specifications/ descriptions want make very clear am push ing purpose determining de fining Electric classes would found competitive events Rather Im encouraging some sanity some maturity way motors described everyone can know what given product capable doingwith little fa miliarization course compares very fa vorably system now usewhich no system Continued page 167 Complete single cylinder system nclud ng throttlecoupled spark advance kit spark spark plug lead25 plug battery pack charger 900 shielded Much kmger up Eta Easy bud sterts-no kickback 1D00-12INIO RPM relile uk 30% mere power en few strokers me uutbm aveldule Lowerpiicedfuebnedtroneeded Shielded spak phg lead uul SF pug cover Ferniatyenpiesfl&up2b4streke siiglsaidtwhicylhders ailvmhactsaVddlh Sperk cais qiuk pligs shielded eke leed & th~m kits avls 1300 RIC BUMPFUN0 FLYRUBBER POWER KITS SUPPLIES NEWPEANUT SCALE RUBBER SPORT 12&13 FT LONG OUTSTANDING CONTAO MORE POWER KIT $35000 ANDREASON PIPER CUB FLYING ACE MOTH p998 MUSTANGZEROBOSTONIAN PUP *895 PRAIRIE BIRD 16*895 NEW GENES/SPIETENPOLLACYROG IS MODEL 8295 RIC FLYING WING GLIDER GIPSY MOTH COUGER 59 INCH WINGSPAN HAND LAUNChNOSE BEARINGS BRASS WASHERS PROPS 4TO 9 CUFF SOAR TARTRUBBER TAN DUMMY CYL CLEAR VINTAGE WHEELS 300 PLANS TISSUEMANY MORE KITS C02 ENGINES KIT $34 NGERFORD SILK S STEEL SPOKED WHEELS 2 3 CHCOMPLETE CATALOG $200 BOX 710399-MASANTEE CA 92072 TEL 619 448-1818FAX 619 448-1833 f-UuyhuI5ff SCALE WHEELS RADIO CONTROL ROL-UNE -FLIGHT VINTAGE 2 3 5, 6% sizes 3/4 1 11/4 1 4 4LLOAU U SOS GOLDEN AGE sizes2 31/i 13% 11443/i 1145 1/a61/ NEW BALLOON 21/41/ 314514 3% SCALE PILOTS- CYUNDERS- ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog other kIts accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 October 1990 163 Chosen Rien 0riids ThG Mfg aid kM Aircraft Squply fer its outitmubg ralility SMOOTH CONTOUR 2% 1314 114 3% 11444 2514

AT LAST able make Tn-Cities Scale Fun Fly last couple years Ive hoping make up Washington tend event thing another has kept making decided year would different would make fun fly no matter what happened turned out skip commencement ceremony San Jose State looking back now think definitely worth Since fellow RC Soaring columnist ron Blakeslee will undoubtedly usual out standing job reporting event will just taking look few exciting hap penings years fun fly Before go further want publicly thank Wil Byers rest Tn-City Soarers have made event such tremendous success over past few years An event like incredible amount work guys kept things running smoothly weekend long havent heard yet Wil rest guys will taking break next year fun fly wont part Slope Soaring schedule events Fortunately though has decided next years Inter national Slope Race will held Im sure Tn-City Soarers will fabulous job ISR have fun fly didnt take long year see everyone going try outdo other mid morning Friday first official day fun fly wind already picked up people loitering around see what going show up Very quickly some truly amazing aircraft began appear pits perhaps incredibleand easiest spot being %-scale Grumman A-6 Intruder brought 4 Left Hal Weber Ed Mason Wayne Stanford pose monstrous 12-ft Boeing B-29 its smaller counterpart Bell X-1 X-1 fit under belly B-29 could separated flight just 111cc real thlngl Right Fun fly organizer WiI Byers numerous oth ers prepare launch B-29 its maiden flight Eagle Butte SurprIsIngly B-29 best-flying planes years event Great job guysl cant wait see what come up next year Below left Ken Stuhr amazingly relaxed buddies pre pared toss off 1/5-scaie Spitfire its maiden flight Larger aircraft like becoming more popular slopes avaIlabIlity powered kits can converted Gliders will help increase trend Below right Slope Soaring News Charlie Morey controls Bob Reynolds Mark Hambieton prepare fIrst launch Toms IncredIble swing-wing F-14 Tomcat After tearing off horizontal stabilizers flight Charlie averted further disaster some great flying healthy dose good luck 50 Model Aviation Radio Control Slope Soaring Mark Triebes 20794 Krelsier Ci Saratoga CA 95070 Ugghhhl Mark Hambietons fantastic -scale Grumman A-6 intruder heaved over side ridge its flight weekend Just about everybody years event trying outdo everybody else think Mark bested beastie DCUs Mark Hambleton Intruder spans about 10 ft just about big enough accommodate small child turned out Mark involved project build fly several A-6s movie Flight Intruder decided build beasts designed twin ducted fans Sailplane flight A-6 say least im pressive Although just bit draggy Intruder still looked fantastic air showed possible fly practically anything slope case anyone interested A-6 available kit DCU talked Mark little found Out addition A-6 has couple other new planes coming Out near future F-14 Tomcat saw prototypes Washington looks great other Rockwell B-l P11 get few details others Marks DCU de signs present upcoming column cant wait till Mark can reached DCU 1556 S Anaheim Unit C Anaheim CA 92805 tel 1-714/535-6969 Just tad bit less exciting bit im pressive A-6 Boeing B-29 built flown members Nampa Model Aviators Idaho Ed Mason Hal Weber Wayne Stanford principals involved fivemonth-long building project B-29 spans 12 ft weighs 25 lb has wing loading about 295 oz per sq ft glass fuselage balsa-covered foam wings B-29 really isnt much different other Slope ship just slightly larger usual maiden flight B-29 Eagle Butte flawless until came time land final approach plane got little slow tip-stalled disappeared behind small knoll made up landing area crowd gave collective groan turned out little premature Superfortress suddenly reappeared fi nally landed some minor damage horizontal stab just first bit incred ibly good luck day As whole B-29 best flying planes present during weekend very stable smooth showed some far-beyond-scale speed As added bonus guys brought along Bell X-l rocket plane could attached bottom B-29 yeah just like real thing dropped flight Ed con trols B-29 Hal standing take over X-1 once dropped B-29/X-1 launched cruised up get little altitude cameras videos ready planes sepa rated almost perfectly Hal got little overexcited elevator control came close reattach ing X-1 B-29 overall separation went smoothly relatively realistic have suggestion Next time guys Continued page 161 Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns 0110w batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x fits neatly onooard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit O5/o lOO5/o tailsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3gg5Introductory offer $2~5 APPLIED ErIGIIIEERIIIG 214 241-6060 PO Box 5100 Carrollton TX 75006 division Research corporation Prices osoject change notice GUNFIGHTERS * POSITIVE FEEL * USED BY TOP PILOTS * FOR FUTABA AIRTRONICS JR OTHERS PLEASE SPECIFY RADIO Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower HobbiesWorld Engines 6MeterSpecials Ill Fly What Fix CA RES ADD 625% SALES TAX Large Inventory R/C Parts Crystals October 1990 51 VS Sailpianes 163 Komet makes siz zling pass along ridge Eagle Butte plane perfect Fridays strong winds megalift Friday best day Sooner later youll see need Special Fast Turnaround Now Available CALL Frequency Conversion $4000 Includes Crystals Certification Spectrum Ana lyzers Cali brated Test struments UPS US Mail Federal Express COD Mastercard Visa Accepted Send Self Addressed Envelope Brochures RC Slope Soaring/Triebes Continued page 51 should put model rocket motor X- 1 fire up just after separation really go super sonic efforts B-29 crew earned Pi lots Choice Award presented Saturday night banquet vote award went Ken Stuhr gorgeous -scale Spit fire Built Yellow Aircraft kit Spitfire ideal size large slope such Eagle Butte large airplane PSS ships about half its size span about four feet can really cover ground its easy see aircraft times its maiden flight Ken waited about 30 seconds before putting plane through some aerobatics speed runs very pleased planes perform ance Also present VS Sailplanes stable two fantastic Messerschmitt 163 Kom ets flown Ken other friends name didnt catch two Komets seen throughout day ripping back forth along ridge ideally suited high winds big lift addition Ken also seen flying new Zulu Slope ships Its kinda cross between MiG 29 F-14 although truly Scale ship very attractive flew great As soon Ken gets chance send info pack products Ill doing feature entire VS line planes Rotor V-Max etc exciting events weekend flying Bob Reynolds swing-wing F14 Bob working quite some time before heading up Washing ton knew would definitely highlights fun fly Bob spent Friday morning reassem bling F-14 just after painting After much kibitzing adjusting praying etc Char lie Morey controls Bob Mark Hamble ton chucked beast over edge very no ticeable flutter horizontal stab occurred plane pushed through turbulence right next slopea sign things come Charlie trimmed plane worked back forth along slope decided try sweep back wings Although F-14 defi nitely seemed Out trim wings back held configuration short peri ods time swing-wing undoubtedly successful As Charlie became comfortable plane began let speed build up little andyou guessed itback came stab flutter As able slow plane down easily no complications Charlie eventually pushed plane little harder again ey Char lie Whats floating down bottom slope Isnt right stab Now time see plane flew half stab should noted hori zontal stab used taileron elevator ai leron control wing has no control sur faces addition obvious problem hand seemed wind dying bit lift definitely decreasing Charlie able work ridge its worth brought plane back up below top slope couple times before eventually making downwind landing resulted minor damage Great job Charlie Now can go change shorts 84 1204-cycle 90 2-cycle T 200025003000- OPS 18- NEW OS BGX-1 3500 models fill need furs hotdog show-off sport plane Knife edge take-offs flat spins snaps anything can Wing foam Fuselage Tail lite ply balsa Builds quick lands like trainer Flying weight 10 lbs 84 13 lbs 1921 Ohio K r OHIO SUPERSTAR PRODUCTS INC 11376 RIOGEWAY ROADKENSINGTON OHIO 44427 216-223-1950 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin {Duracraft Inc 1007 Ovriiatd Grove 05 Royal Oak 48067 DuraBat 40-size 4-channel aerobatic trainer - JET ENGINE YOU CAN BUILD - IN ONE EVENING NO WELDING OR MACHINING 4 6 HP GASOLINE FUELED Engineers have designed both HIGH PERFORMANCE JET ENGINES FUN EASY build IN ONE EVENING using parts materials YOU ALREADY HAVE AROUND YOUR HOME such AEROSOL SPRAY CAN Only Simple Tools needed -(electricdrill tin snips rivet gun Both engines will powerR/C PLANES .CARS BOATS great speeds produce 3 FOOT FLAME Under $5 build Both plan sets FULLY ILLUSTRATED STEP STEP COMPLETE fuel ignition systems JOIN THE JET AGE sending $12 4 HP plans $14 6 HP plans $20 both plan sets JET ENGINE TECHNOLOGIES- - 10241 Ridgewood El Paso TX 79925 October 1990 161 SPORTOBATIC 79~ 89~ SPECIALISTSINCUSTOMCOX TEE DEE& REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY COMPETITIONACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OFFUEL TUBING THREEBRANDS OFGLOWPLUGS HARD-TO-FIND HA RD WARE OLD TIMER SUPPLIES COILS CONDENSERS NGK& STIlT SPARKPLUGS SILK8 COLORS QUALITYDOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSIONLEADS 1/2A TEXACO PLA YBOYSR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER P0 WER KITS PROPS TISSUEAND OTHER SUPPLIES C YANOA CR YLA TES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $300 STOCK ORDERS SHIPPED WITHIN 24 HRS NEW CARB ROTATION KIT NOW AVAILABLE FOR ALL Q-3540 & 42 MODELS FULL LINE OF ZINGER 23 & 4 BLADE PROPS U S QUADRA RT 1 NEODESHA KS 66757 $100 FOR CAT 325-2821 potential definitely swingwing F-14 some further testing beefing up control system needed before its po tential can achieved Keep up good work Bob award quickest roll rate goes Brian Laird Slope Scale Brian brought up entire flock Power Scale ships including Spitfire MkXIV P-SLD Mustang Zero 109 P-63 FW-190 After watching Brian put planes through paces including great dogfight between Zero Charlie Moreys P-S 1 impressed went out bought FW-190s soon got back California Ill go detail kit Slope Scales other designs later date meantime can get touch Brian partner Paul Masura Slope Scale 12935 Lasselle St Moreno Valley CA 92388 tel 1-714/924-8409 last column included photo short discussion about Aero L-39 Albatros being kitted Vein Hunt Model Airplanes Well Vein made trip out Washington brought few beautiful little ships him airplane looks better person did photos Vein continually sur rounded curious Slopers armed questions cash too bad Vein didnt have kits him could have sold million never got chance see Albatros fly have seen enough airplanes know what goodflying plane looks like impressive thing about Albatros craftsmanship fuselage gorgeous wings stab come presheeted sanding already done its great bargain $175 price tag missed last time con tact Vein Vein Hunt Models 4950 Butternut Trail Juneau WI 53039 tel 1-414/349-8101 Youve probably noticed everything Ive talked about far has Power Scale stuff Well part PSS planes made up majority what present fun fly quite few Scale Sailplanes around high winds Friday no-wind condi tions Saturday made difficult guys fly notable exception Bill Liscomb gorgeous 12-ft-span DG-202 continually seen heard tearing up skies over Eagle Butte Bill forced way Brian Charlies dogfight short time before thinking better landed de cided take over controls Charlies P-Si Another Sailplane caught attention Sal Pelusos immaculate four-meter Discus Roebers Without seeing fly have decided plane will first true Scale Sail plane ever get time money get type flying Dont think minute few happen ings have talked about oniy ones years Tri-Cities Scale Fun Fly have simply taken look what opinion high lights event As said before Byron will taking much in-depth look people planes years event Notes Selig talk Since spending time enjoying food hangar flying fun fly banquet rather doing job taking notes Michael Seligs talk very pleased find following piece Barry Ku rath newsletter Portland Area Sail plane Society Michael Selig featured speaker Memorial Day Scale Fun Fly Richland John Donovan along David Fraser well known RC Soaring community research Princeton wind tunnel covered topic very interesting slide show would like summarize another part presentation Sailplane design Please remember am untrained hobbyist notes based limited understand ing very technical topic first area Sailplane design addressed Mr Selig fuselage design stated area potential improvement intersec tion wing fuselage proposed pylon mount forward portion wing cantilevered pylon would interfere airflow over first 40% air foil said dividing wing half standard plug-in bolt-on systems doubles certain type drag parasitic Another way improve area dramat ically increase chord wing root Next discussed construction techniques relate drag new composite-built wings can have accurate airfoil over full span wing much sharper trailing edge traditional stick-built wings mentioned open bays behind spar add drag creating small vortex rib ad ditional drag little vortices added up becomes significant Another method increasing efficiency sharpen wing tips much like sharp trail ing edge prevents tip vortex roll ing over top wing encroaching area could providing lift creases effective aspect ratio Tip planform angle areas also need improvement Selig sketched front view bird showed anhedral root sharp upsweep tip said Dr Eppler has found angling tips up 250 would about optimum Gusts bumps cause airplanes stiff wings change angle attack undesir able times suggested leaf-spring system root allow wing flex response bumps thus avoiding change angle attack raised some questions about would build such plane would re spond winch launching suggested areas experimentation inventors crowd hope comments accurate re flection Michael Seligs presentation useful creating next origi nal-design Sailplane Great job Barry Some stuff can defi nitely incorporated Slope design especially Slope Racers ginning appear up down coast Sharp vs square trailing edgesPart Just thought safe return pages MA heres yet another piece never-ending controversy about trailing edges comes Ken Kawahara Redondo Beach CA introduces some new interest ing twists concept square trailing edges race cars al car matter possible tt keep flow attached tapered afterbody tail section Wind tunnel testing will show flow separation well ahead trailing edge idealized body shape Truncating afterbody squared-off tail point separation has little no effect drag reduces weight However airfoils use flow 162 Model Aviation IA VERA GES 0 VER 9000 PROPS I! IMMEDIA TESHIPMENTON WSA/MC 0-42 QUADRA 29 HP40 LBS AVAILABLE EITHER POINTS IGNITION OR C D IGNITION should still attached upper surface trailing edge under conditions detri mental effect thickened trailing edge drag has documented Interestingly enough though Gurney Flap Gurney Lip Gurney Angle Iron etc trailing edge both model airfoils race car airfoils significantly increases lift negative lift down-force case inverted race car wing minor increase drag Gurney Flap vertical surface approxi mately 1-2% chord height trailing edge underside airfoil Gurney Flap likely descendant spoiler found trailing edge upper sur face nonwinged race cars spoiler caused increased local pressure region ahead due formation large separation bubble pressure bubble area increased thereby reducing lift remember race cars want positive lift separated airflow reattaches upper edge spoiler gives additional ad vantage being stable over wide speed range very concerned about strength stability razor-sharp trailing edges Gurney Flap provides another interesting alterna tive Ken noted three good references subject Road Vehicle Aerodynamics AJ Scibor-Rylski Race Car Engineering Mechanics Paul Van Valkenburgh Soartech #8 Selig Donovan Fraser am sure end continuing discussion subject trail ing edges continually try ing find advantage against competition keep up research experimentation RC Electrics/Kopski Continued page 55 dude AMA 627 610 623 plus Longest Flight day All-Up/Last-Down Most Aerobatic Most Impressive Farthest Trav eled Get details Boyd OBrien PO Box 7153 Metairie LA 70010 tel 1-504/8355212 Ben Mathews 101 Mulberry Dr tairie LA 70005 tel 1-504/833-5589 [home] 1-504/366-4511 [office] Electric events often take form fun activities such just men tioned above Some meets include formal AMA Electric events although lesser degree latter events fully described AMA Competition Regulations booklet have place about two years columnist would like know what preferences respect Electric events Are fun event person formal competitor about letting know what like Ill sum marize results future column Reader reaction note month includes some misunderstanding ongoing crusade establishment meaningful useful intel ligent standardized Electric motor specifications/ descriptions want make very clear am push ing purpose determining de fining Electric classes would found competitive events Rather Im encouraging some sanity some maturity way motors described everyone can know what given product capable doingwith little fa miliarization course compares very fa vorably system now usewhich no system Continued page 167 Complete single cylinder system nclud ng throttlecoupled spark advance kit spark spark plug lead25 plug battery pack charger 900 shielded Much kmger up Eta Easy bud sterts-no kickback 1D00-12INIO RPM relile uk 30% mere power en few strokers me uutbm aveldule Lowerpiicedfuebnedtroneeded Shielded spak phg lead uul SF pug cover Ferniatyenpiesfl&up2b4streke siiglsaidtwhicylhders ailvmhactsaVddlh Sperk cais qiuk pligs shielded eke leed & th~m kits avls 1300 RIC BUMPFUN0 FLYRUBBER POWER KITS SUPPLIES NEWPEANUT SCALE RUBBER SPORT 12&13 FT LONG OUTSTANDING CONTAO MORE POWER KIT $35000 ANDREASON PIPER CUB FLYING ACE MOTH p998 MUSTANGZEROBOSTONIAN PUP *895 PRAIRIE BIRD 16*895 NEW GENES/SPIETENPOLLACYROG IS MODEL 8295 RIC FLYING WING GLIDER GIPSY MOTH COUGER 59 INCH WINGSPAN HAND LAUNChNOSE BEARINGS BRASS WASHERS PROPS 4TO 9 CUFF SOAR TARTRUBBER TAN DUMMY CYL CLEAR VINTAGE WHEELS 300 PLANS TISSUEMANY MORE KITS C02 ENGINES KIT $34 NGERFORD SILK S STEEL SPOKED WHEELS 2 3 CHCOMPLETE CATALOG $200 BOX 710399-MASANTEE CA 92072 TEL 619 448-1818FAX 619 448-1833 f-UuyhuI5ff SCALE WHEELS RADIO CONTROL ROL-UNE -FLIGHT VINTAGE 2 3 5, 6% sizes 3/4 1 11/4 1 4 4LLOAU U SOS GOLDEN AGE sizes2 31/i 13% 11443/i 1145 1/a61/ NEW BALLOON 21/41/ 314514 3% SCALE PILOTS- CYUNDERS- ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog other kIts accessories DEPT MA PAWNEE ST SAN MARCOS CA 9 October 1990 163 Chosen Rien 0riids ThG Mfg aid kM Aircraft Squply fer its outitmubg ralility SMOOTH CONTOUR 2% 1314 114 3% 11444 2514