Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation
Edition: Model Aviation - 1987/08
Page Numbers: 46, 47, 145, 148, 149, 150
Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation
Edition: Model Aviation - 1987/08
Page Numbers: 46, 47, 145, 148, 149, 150
Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation
Edition: Model Aviation - 1987/08
Page Numbers: 46, 47, 145, 148, 149, 150
Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation
Edition: Model Aviation - 1987/08
Page Numbers: 46, 47, 145, 148, 149, 150
Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation
Edition: Model Aviation - 1987/08
Page Numbers: 46, 47, 145, 148, 149, 150
Radio Control Soaring Byron Blakeslee LAST PITCH US F3B Team con testants Steve Work Rich Spicer Steve Lewis will leave Germany about mid-July Im sure everyone knows deal now team needs raise about $15000 donations accomplish what set out give United States best possible representation 1987 Soaring World Championships agree important can assist pur chasing team pin $5 beautiful patch $10 both $15 could also win nice prize because couple thousand dollars worth radios kits will raffled off contribu tors Please send donation USA Soaring Team PO Box 9328 Albuquerque NM 87119 letter Team Synergy Seth Dawson member Team Synergy F3B Team assistant manager wrote following letter thought youd find interesting Team Synergy formed members South Bay Club develop world-class F3B Sailplane plane good enough get Rich Spicer Steve Lewis places 1987 US F3B Team read comments May column interest agree wholeheartedly amount dedication money time effort required field winning F3B team group can sustain level commitment satisfaction pushing piloting skills Sailplane design limits very real down side no question winning team must put thou sands hours dollars pushing state art last two years weve destroyed half dozen Synergies exploring boundaries pilots Sailplanes performance Rich Spicer has destroyed two Steve Lewis three Ive crashed burned Id always known graphite conducts electricity accident proved just well does photo shows what happens jumper two 12000-volt power lines Synergy carbon wing skins spar shorted power lines plane burst flames time burned out several hundred dollars worth radio graph ite well couple hundred hours work reduced blackened lump carbon No injuries property damage resulted crash result battery failure brandnew receiver pack bought expanded-scale voltmeter next day now check RX TX packs before flight F3B international level very demand ing sport sacrifices burnt otherwise made team substantial satisfaction creating best man machine makes sacrifices worthwhile new German Scale kit maker Just thought heard companies pro ducing Sailplane kits Germany heres new rather special Tony Amoux Miami sent catalog Roke ModeIlwhich un fortunately German color pictures very impressive could make Out sufficient words get idea Roke com pany Roland Kern located Wannweiljust south Stuttgart Tony Arnoux auto parts importer spends quite bit time Germany business Tony said heard Roland went visit him Wannweil Upon seeing Rolands planes Tony said overwhelmed size quality fabrication bought several sent Florida auto parts shipping container Tony bringing limited number kits sell others want fly big Scale ships desire highest quality materials did Seth Dawsons Synergy Above get such horrible shape Well its madeof carbon fiber/epoxy carbon isa conductor electricity model hit shorted out pair 1 2000-volt power lines info column new US F38 Soaring team R people front row LR Seth Dawson assistant team manager Tom Thompson helper Phil Renaud team manager Lynn King helper Richard Tlltman helper Fliers planes back row LR Steve Lewis Synergy Steve Work Comet Rich Spicer Synergy 46 Model Aviation ASW 17 Riesensegier ocale Sailplane ermunys nuu Its largest kit make spans 56 meters 182 ft Weight 18132 lb its expensive too TonyArnouxMiami FL has imported some German Roke kits Heres Tony Scale SB 10a giant 15-ft 4ln wingspan Notethe retractable landing wheel Photo left think wing hes holding bentyoure right Look wind blowing streamer mast just behind him column HiNCtVol Tu -lOAieL IIJ51tE Pive TLJB Heres make arrow-shaft hinge details column workmanship Roke line includes three sizes ASW 17 280- 340-meter span 415-meter ASK 18 410-meter ASW 19T 474-meter SB 10 375-meter Pilatus B4 486-meter DG 202 finally monster ASW 17 560-meter wing span Thats 182 ft weighs 132 lb has wing loading 168 ozIsq ft Tony said Roland built seven-meter Astir prototype model weighed over 20 kilos 44 lb problem Germany need pilots license fly plane RC weighs over 20 kilos Needless say Roland re-engineered get weight below 20 kilos does launch Sailplane heavy ask jacks up back wheel car replaces wheel rim no tire attaches length bungee strong fish line rim voila Mercedes heavy-duty winch Rokes construction fiberglass fuselage balsa-covered foam wings carbon fiber glass spars appears wing joiners control rods factory-installed havent chance get catalog translated am fuzzy about some details Prices range about $250 $600 depending size plane say about because dollar sinking respect mark German kits will going up Best contact Tony youre interested Send $4 youd like catalog Tonys address 1744 NW 82 Ave Miami FL 33126 Continued page 145 OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER J Use TATON ES THRUST TESTER determine maximum engine output using different C props fuel mixtures 0 RPM levels Cheek engine oninct nrthor TATONE 30-13 ALUM MOTOR MOUNT ENGINE THROTTLE CONTROL SAFETY STARTING LOCK ONLY $6996 AUgUst198747 ALL PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS ue device Tor cutting nign quaiity toam wing cores hands off also cuts both sides same time Most modelers will amazed high qLality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package$8750 pius *3 shipping handling 24 Volt Variable Output Power Supply$5250 pius *3 shipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road Wichita Falls TX 76310 Tel 817 692-4475 DIRECT READiN THRUST DIAL TIlE JOURNAL OF THE AIRPLANE 1920 1940TilE EARLY AEROFLAiE Leo Opdycke EditorKenn Rust Editor WW1 AERO 19001919 SKYWAYS 19201940 two Journals contain information current prolects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 L2M#p&a INC 15 Crescent Road Pouqhkecpsie NY 12601 USA 914 473-3679 didnt appear exhibit Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 Flying 205Part 2 continuation article written Larry Jolly began last months issue youre still thermal left last month models probably getting pretty high Lets think about before leave thermal remember Thomburgs rule know always leave exit thermal back side Thats because since sink follows lift want get flying start scoot through patches bad air let Sailplane come wind commence circle down wind reach back side circle turn nose wind give opposite rudder aircrafts nose now pointed wind hopefully back field Note leave Up elevator trim transmitter alone model will now begin porpoise because must reduce angular difference decalage between wing stabilizer allow model cruise very important bring elevator trim back neutral can cover maximum amount real estate enabling reach next thermal common pitfalls area per formance too much Up trim causing model lose energy its climbs dives other extreme too much Down trim causing over-diving reason use 205 because its excellent L/D lfi-to-drag ratio editor too much compromise other areas airfoil performance Observe tendency airfoil show its point maximum L/D carefully applying Down trim click time will able see point model exhibits its best ground-covering ten dencies click model just builds up speed L/D goes trash have read article point should able summarize follows 1 must build true model maximum performance 2 must fly model observe iden tify two major points its performance curve first point amount tailplane deflection will need best climb performance ther mal second point tailplane setting will give maximum glide angle Matcnea rrmanu TOPFORMAIdL K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY FAINT K&B MIXING CUPS brief summary essence arti cle point did forget tell maximum climb position elevator trim also position will yield highest tow During normal contest flight check elevator trim properly set healthy toss will ensure model reaches necessary flying speed will need case have line break zoom-launch will find necessary hold excessive Down stick during actual zoom overcome Up trim Once launch com plete immediately trim maximum cruise lift encountered trim maximum climb Several have already figured out basically fly elevator two trim modes true reason efficiency figure aircraft has much potential energy maximum its its launch height force gravity given condition thingother atmospheric conditionsthat will bring model down faster-than-expected rate creasing its drag control deflection causes drag important Sailplane will exhibit specific behavior given tailplane setting have observed model carefully remember way behaves will have basis make in-flight judgments Instance youre maximum cruise mode suddenly models tail raises its speed creases Now know didnt give model elevator command can pretty well guess model has entered better air about start climbing basis decision-making extremely important contest pilot following part article landing dont want pass up because us know modern Sailplane contests won ground times have seen guys come smoking through landing cir cle cartwheeling model hitting timer bad luck no matter much might complain blown approach yields very predictable blown landing Lets launch 205-equipped Sailplane again Thats good amount line tension Now throw model As model climbs pull some Upstretch line As start round over top some pulsing winch pedal could prove prudent Now let off Up elevator tap winch last timehard pull Up elevator get off winch pedal same time may need little Down round over top glide guys launching much better started Now lets concentrate landing thing hope currently have some sort Continued page 148 1000 ToOls FREE Catalog MicroMark, Small Tool Speolahala ii paula munnaur louIs palall find idaMaaiq WhaM mar maw MICIOMARK catalog Mny tools brd-lo-IInd . HUGE DISCOUNTS No narelaing hue stare Now nueptlalag pan toed s clone pour malibu Ssoo tIme save memyl 0I 20 use thin coupon send name address Micro-Mark Box 5112-39624 E Main SI Clinton NJ 08809 I I carearnrt...aI L O,r,de USA edS2OOtoArMapoVg I 3 PRICE 299 379 479 689 989 SLRItY 11/LI THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THP 12B6/z778 13677/s8 146778 1567 16878 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 2O/e INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 5/a34149 634149 72833456179 833/,4568189 845881/a199 9456677/e199 1045667209 106W8W209 106EW219 114677778229 115W229 11BEW239 11/67239 124W279 125W279 1256279 1356349 1456459 1556659 1641/aN969 16678969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/aN279 84 6/,7/a78 299 SERIES 400C 8 6/a677/a7289 977/a7289 *W WIDE BLADE EW EXTRA WIDE N NARROW August 1987 145 THE LEADER IN COMPETITION PROPELLERS NEW 4 CYCLE NEW BLACK BARON IRON ROLL-BARS OWETE 420 Babylon Rd Horsham Pa 19044 RC Soaring/Blakeslee Continued page 145 standard landing approach what Ive seen contests believe might great hit-and-miss arrivals going out Anyway enough criticism want think back early part article remember what happens let nose drop 205 Thats right speed comes up aircraft starts covering lot ground Conversely pull back elevator go past minimum sink mode old drag bucket starts tugging tail model begins lose altitudeits just mushing out air Lets get Sailplane condition nose wind Notice model now covering much less ground pre sume have spoilers dog lets use Use elevator trim hold nose up Now count three raise spoilers same time pull levator very important both controls applied si multaneously apply spoilers too quickly will very rapid nose-down pitch applied Sailplane Very untidy indeed spoilers up notice sink rate increases See much elevator can pull model should able take full Up elevator stalling Practice closing spoilers Oftentimes Ive seen people get trouble because didnt knowor didnt thinkto close spoil ers Think spoilers would accel erator car must train yourself apply needed adjust glide path Neverand mean neveropen spoilers full attempt approach landing guar antee youll land short As said good landing starts good approach So lets go through Im going give approximate place plane should timewise lets get landing right worry about precision two minutes go flight deter wind direction Deposit yourself upwind side landing circle wind directly back Check wind again 130 again minute go Forget about moving after minute go will just throw landing off Ideally have leamed first part series skied out Lose altitude necessary remember save plenty altitude approach Nothing looks sillier come bonsailing out thermal get caught sink consequently land short Position model directly down wind approximately football field away 200 ft highabout half launch height wind blowing hard either carry speed approach window dont start far downwind approach window like enter window normal gliding speed read cruise 60 seconds go Place elevator trim thermal trim usually circle until 50 seconds go bring Sailplane directly towards gliding decreasing angle will place model 40 ft high approaches will course necessary hold Down elevator achieve glide angle Now make 900 tum either way carry line 100 ft Try achieve line will take model over peopleor worse other transmitters dont want arrive early leg approach should con serve 40-ft altitude doesnt mean should just release stick neutral model will zoom back altitude because its excess speed As saying carry line about 100 ft five seconds 25 seconds go tum 900 downwind Go straight downwind hold enough Down elevator keep cruisingand ideally time reach 18 seconds should down 25 ft positioned about 75 ft downwind moving 18 seconds tum 900 path will cross landing circle perpendicular wind direction officially base leg definitely going land Now between IS 12 seconds go tum 900 wind directly towards circle likely will need start slowing model time start apply ing spoilers Up elevator An ideal approach would model start 15-ft altitude 75 ft out glide straight towards center circle con stantly evenly losing altitude touches down 95 mark away slides 100 have found model should about three feet above ground nears edge 25-ft circle side away Any higher will have trouble keeping overshooting center circle Anyway must use elevator spoiler fly down final leg As approach edge circle make sure have wings level time have make rudder corrections Now have wings flat model three feet off ground about nail center PRODUCTS FOAT Complete Line Exhaust Systems * Tuned Pipes led Tuned Pipes * Headers uri Mufflers * Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanshin & Performance ADD I2%SHIPPflfGVrf~ Aflfl 8TX TIirebulll RIC Idle-Bar Glow Plugs Long Short Also.Only $189 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $149 tiI S,ano saa 148 Model Aviation hate install hinges Try Easy Hinges See Difference single slot few drops C/A glue its done No gouging pinning hinge pins worry about Incredibly strong Virtually indestructible 24 hinges 295 P0 Box 1743 Marcos CA 92069 --100% Blackstone coating slides almost no adhesive buildup Electric Flight hAns Srnkn B LighiwelgAn 11 B Adjoafobln nwiching poton off Controller Power aavn weight 6e Onay high efficiency Only 006 V loon nO 20 nine 22013nA3 Add 000 ahipping CaIlfnnln renident odd 65 Ton last akak nancy ardor names withHIGH SKY Yataba aenneatar 3929 KANSAS 5tfl9 SAN DIEGO CA 92104 VUI B 0~FLYThG SPT SCALS AICNCA L-16B/CmuI& 84 IN SPAN a6075/2 CYCIZ 75-.90/4 CICIZ VUI ET-13 VALIANT 811 IN SPAN a9042/2 CYClE 1248/14 CYClE R0LI PlAN S1S FThERGIASS cIS AZRO PlANS N PARTS POa BOX 9 OIZkN NY 111760 76 37Z Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba G-Series PCM2250 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Frequency Conversions ______ __ t$40 ___ tb0—- Futaba AM$30 _____________IV___ Futaha FM$40 _______________________________________ProLine/Ace$30 __ e__ Featuring fast service -_ _With repair Less $10 qualified people ____ A%4Mode Change $35 latest equipment including air Heli Sets SPECTRUM ANAL YZER Gyros Order COC VISA MC andling ChargesOPEN 8-5 CST904 478-6745 Prices subject change notice mm 43 West Nine Mile Rd Pensacola FL 32514 le Carefully slow model applying spoiler Up elevator As get closer center circle use Up elevator proper landing will occur pull full back elevator spoil ers plane inches off ground 90-point mark model should touch down flat stop very near center Notice difficult part being three feet above end tape moderate glide speed course can master ap proach up point will achieve good landings Dont ever give Down elevatot attempt save approach too high airspeed will increase model will prob ably overshoot least may damaged crash ground entire approach designed give much leeway possible check points built should able use spoiler elevator correct too-high too-fast approach An approach too low slow corrected turning early Please note deviations should corrected early pos sible wise wait until edge circle coming up plan landing simply too late point anything about Things remember First catch self too fast high cross threshold circle immediately apply full spoiler full Up elevator right will able scavenge points diving ground model will flyable next round Second have found helpful timer stop counting down eight seconds go simply will have too great urge dork model timer reaches zero have found approach eight seconds last checkpoint will need would rather con centrate 100-point landing second off crash 70 time can still win second off hope has helped you have comments questions please contact Im still learning have Glider-guiders step-bystep how-to top Sailplaners world Larry Jolly beginners mem orize main points what Larry has written guarantee will progress much faster fun game known Sailplane contests Just add little what Larry said about landing fairly-fixed landing pattern like Larry described will definitely help get spot time Practice doing both left- right-hand patterns prefer left-hand pattern sometimes doesnt fit geography well turning right Larry says make Final Turn Point FTP 12 15 seconds means point ground movable think youre going short time make turn sooner cut corner Conversely looks though have few extra seconds get rid fly past FTP make 1800 tum get back final glide path least 50 ft fly spot need full 50 ft make sure plane lined up straight spot Landing little short little past spot understandable theres really no excuse being left right make tube arrowshaft hinge piece Lenny Keer first appeared Spoiler newsletter Pikes Peak SS Randy Rey nolds editor Lenny lives Gilcrest CO member both PPSS Rocky Moun tain Soaring Association tube hinge aero dynamically perfect freely moving hinges can put Sailplane also very easy once know procedure best used foam wing already skinned hard thin material like fiberglass best results wing should constant-chord hinge line should arranged have constant thickness Preparing wing Cut control surface aileron and/or flap wing leaving /x-in kerf ap radial arm table saw works fine Cut wing supported its foam beds wont turn 2 Measure wings thick ness hinge line will determine required diameter hinge Outer tube sporting goods store obtain enough aluminum arrow shafts outside diameter OD equal measurement available /M-in increments same time buy shaft just slips inside hinge tube will used inner pivots 3 Wrap sandpaper around hinge tube carefully sand hollow both wing control surface depth almost half tubes diameter finished should able reassemble wing control surface hinge tube place still retain /o-in space between wing skins both top bottom 4 necessary splice hinge tubes short piece pivot tube Epoxy hinge tube onto control surface aileron/flap 5 File slots hinge tube skin skin about /x-in-wide spaced about six inches Making pivot tubes hinge loca tion will need piece pivot tube about inch long piece wood dowel same length slip inside small screw eye shank thickness about 2 6 Zap dowel piece inside pivot tube drill hole straight middle side screw eye sure remove burrs hole Assembling hinge Relieve small slot foam location screw eye 8 Protect hinge tube Vaseline epoxy screw eyes wing hinge tube will held against wing quite adequately control surface will move up down very smoothly news picked up Toledo Paul Carlson Off Ground Models did have booth show nice chat aisles First Paul wants know has moved factory Lawrenceville IL address PO Box 518 Old Highway 50 East Lawrenceville IL 62439 new phone number 618 943-7070 Paul said cant make enough Two-Meter Prod igy kits keep up demand working new three-meter design called Questor can also cut down build 100-in plane will have fiberglass fuselage foam wings fully sheeted save weight Airfoil Selig 4063 root 4061 tip Sounds interestingcant wait see Another bit news about new Hand-Launch design comes John Lupperger may have seen photo Bodst Bird Daylight Savings Time Bill Forreys May Model Builder column micro-sized version Dave Thornburgs Bird Time quickly gaining popularity among Hand-Launch devotees Southern California John says now producing semikits include rolled plans parts except /32-in wing sheeting Send John $1995 plus $250 postage too might step winners circle Johns address 1304 Palm Ave nue Huntington Beach CA 92648 Dodgson Designs new construction tapes Bob August1987149 J Dodgson has new construction videotapes ready shipment Bobs Tape No came out last winter showed beautiful flying shots four planes produces design philos ophy New tape No 2 shows Dave Banks wing construction sequences runs two hours Tape No 3 shows fuselage construction linkage layouts 90 minutes havent seen new tapes Id imagine would invaluable anyone buildingor thinking buildingone Bobs kits refundable deposit $15 $30 $40 depending whether order two three tapes time Shipping handling $10 $15 $20 making total $25 $45 $60 Other news Bob extra $45 will partially pre-build fuselage new Windsong Camano Pixie Formers bulk heads elevator bearings nose wing saddle plywood decking installed rein forced called plans work done jig fuselage locked perfect alignment Bob also says business going great add help get backlog down manageable level Bobs address 21230 Damson Road Bothell WA 98021 phone number 206 776-8067 Valley Forges Fifth Annual Sailplane Contest will held August 15-16 site Valley Forge Signal Seekers flying field near King Prussia PA Sportsman Expert Junior will flown both class D class B both days Hand-Launch class event will flown both days Sport Scale Sunday biggest contests East hear its well-run lot fun CD will Fran Olix also Soaring CD Ehe Nats year info write Fran 764 Alexander Drive Hatfield PA 19440 phone 215 341-6713 day time 361-9516 evenings end column month Id like share contents note sent Mrs Mary Holley addressed Sailplaners expressed sympathy Dwights passing last December Model Soaring large part Dwights life know acknowledgement accomplishments type Champion would mean great deal himas does Bryon Blakeslee 3134 Winnebago Dr Sedalia CO 80135 Please enclose SASE responses SEND SASE FOR LITERATURE SHEETS Its also true instructors created equal Some people can fly own airplanes just fine cant teach others really good instructor can dramatically shorten training time student Now get tough onethe trainer airplane As mentioned earlier key learn ing fly RC keeping airplane piece good student has good instructor buddy-box needs entirely different airplane poor student no instructor powered Glider good choice trainer airplane students slow learners have poor/no instructors and/or no buddy-box type airplane inherently stable can often fly itself out trouble much easier fly land because moves relatively slowly novice pilot has better chance keep up aircrafts motion permits student time evaluate orientation airplane figure out what wing loading usually fairly low often allows survive crashes good shape wouldnt everyone want learn fly using powered Glider Well depending abilities novice pilot instructor availability buddy-box some students will learn lot faster others Pilots seldom use powered Glider type trainer-airplane much radio check airplane after learn fly So move advanced trainer much like airplane other proponents would have recommended start out means investment money long run its wasted pilot can learn fly quickly Having said Id straddle both sides issue must add beginner can decide airplane best satisfies training situation hes found himself Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Electrics/Kopski Continued page 51 Part No 4032 priced $6 Cell size just mentioned above since readers experience some confusion difficulty dimension thought Id offer some additional information Before con tinuing may want reference April 87 MA column same subject 36 Cell size generally expressed either ampere-hours milliampere-hours expressions simply refer amount charge cell capable accepting delivering ie big tank electrically As example popular 12 Ah ampere hour cell can expected deliver about 12 amps hour 012 amps 10 hours such total current-time product So sixminute ho-hour motor run flight average motor current would have 12 amperes completely drain cell assuming started fully charged pack because 12 amps x Yo hour mpere-hours course cell capacity can also expressed minutes Thus same 1 2-Ah cellor pack can said have 72 ampere-minute capacity since 60 minutes hour 12 x 60 ust portion size description identifies time-factor can expressed way also can part describes electric current Thus 1 2-Ah example can also described having 1200 milliampere-hour capacity since 1000 milliamperes ampere Miii means 4ooosee July 1985 issue MA Combining above could call example 72000 milliampere-minute cell pack Well little cumbersome routinely used expression However does serve additional illustration idea cell size Great say what use Well lets say wanted fast-charge rather small motor pack Free Flight Electric Lets say using 250-mAh cells wanted charge 15 minutesthe longest period can set time-switch charger question comes up much charge current should used Remember doesnt matter cells areonly cells pack must same size obviously way look question approach realize 250 mAh one-quarter ampere-hour since 250/1000 could charge 1/4 ampere 250 milliamps hourbut thats four individual turns 15-minute hour charger-timer knob Since really want job just timer-knob turn charging has done four times faster Clearly example would charge 4 x 250 mulliamps 4 x amp amp 15 minutes Again 1 amp x 15 minutes p x ere-hour 250/1000 ampere-hour milliampere hours about something uneven Continued page 152 150 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered $1795 / KORDA 33___________ DEALER AND DISTRI BUTOR_________ INOUIRES INVITED PLUS 8 MORE RUBBER POWERED MODELS KIT INCLUDES FOLDING PROP MATERIALS SELECT WOODS FULL SIZE PLAN CLOUD 33 R/NmocielsPouox 5059ALAMOGORDO NM 88311 CLODHOPPER RC Aerobatics/Van Putte Continued page 49 responding advertIsers mention read about ModelAviation