Free Flight Duration Harry Murphy INSPIRATION day after Christ mas begin column Outside nickel-size snowflakes have falling heavily hour pesky things have already built up fluffy white blanket ground depth two three inches As family out run ning around returning gifts either too large too small sit staring through window workshop nursing miserable head cold wondering ever proved no two snowflakes ever alike Anyhow year-end yuletide sea sonal rush ebbs once again time clean out field box spruce up workshop dust off workbench make ready begin building new model always start New Years day am superstitious per son beginning new year start ing new model has tradition years care ad mit Some years effort might consist pad full computations few lines drawn shelf paper other years might have meant actual construction stab wing half beginning fuselage Over-the-top new year also time ponder lessons learned experi ence mental flinches possible blunders mistakes made Down previous contest season Any design errors remedied before action begins once again ensuing months can probably expect similar results per previous season case last season particular ly frustrating Having spent previous winter stripping old AMA gas-powered workhorses fuel-soaked silkspan tissue coverings replac ing brand another heat-shrink plastic films subsequently spent entire flying season fighting off effects phenomenon call 72Model Aviation C ction Flex high-purformai discussed onths column discusses keep hot Power ship climbing right Older planes didnt have tremendous power higher speeds generated current-day engines Englands Dunham Engineerings contri bution replica diesel market Elfin 249cc its also SAM-eligible OT Ignition engines use booster batteries during starting Harry continued use triedand-proven twin-#6-celi pack L until recentlywhen found price skyrocketing shortage fresh ones stores now uses homemade unit righE inside four alkaline 0-cellsobtainable everywhere discount prices wing flex learned hard way depending design construction wing gas-powered model transition silk silkspan MonoKote Micafilm may out pain plastic films certainly superlatively fuel-resistant compared traditional coverings price may have paid increasing con structed rigidity wingwhich turn adds unwanted weight Admittedly rather lulled myself trap previous efforts using iron-on films amply-braced structures 10%-thick airfoil sections 85 situation different story 85%-thick sections much-lighterweight structures models difficul ty staying power patterns would often go over-the-top wander off cross-country under power model speed increased about midpoint engine runs As result exchange notes super flier Gil Morris past month must have noted huge tear stains stationery explained dilemma return received five-page reply subject following itemized excerpts Gil sez 1 Micafilm like Mylar keeps out wind rain contributes no struc tural strength Silkspan dope still best coverings structural purposes torsional stength 2 model going straight up under power position CG Center Gravity really doesnt matter acting someplace pylon parallel fore-and-aft axis fuselage no consequence down equals up zero-lift condition However what important wing remains zero-lift condition lifting model would loop conversely zero-lift condition forward pitch moment wants twist wing toward washoutthus causing nose drop over the-top effect follows 3 A wing pitching moment ap plied will first diverge twist toward washout twist sizable will resonate flutter frequency determined spring constant wing structure weight distribution wing itself Actually lucky wing flutters because instant ly know may have diverging problem sneaky ones diverge flutter can lead drink Mine didnt flutter Gil What brand booze recommend HM 4 Originally Toothpicks design would occasionally go over-the-top kept beefing up wing until im possible twistand still went over the-top took two years learn stabilizer airfoil too thick would produce same symptoms came thinning stab airfoil case now use either semisymmetrical full-symmetrical stab air foils 5 thing look iswhen engine quits nose momentarily pulls up wing may diverging stab airfoil too thick both 6Correcting stab simple necessary strip covering round bottom ribs bit recover wing may take some ingsuch planking leading edge back main spar both top bottom thereby making section closed box D-shaped section box isnt closed wont much good Rather use planking prefer wide main spar web sides closed-box configuration Diago nal ribs help too 7 I feel time-of-day has something problem well model suspect having wing flex difficulties should find likely go over-the-top cool air morning evening midday because engine putting out horsepower higher volumetric efficiency intakes weight Continued page 162 April 1986 73 Ed Konefes packs turns Lanzo Stick Wright Field contest nonGas fliers sure keep clothes clean Eds Buzzard Bombshell man Meredith Chamberlain checks out fuel shutoff Britishdeslgned Os Max 19powered Crescendo Sturgis Ml contest Plane won its Nostalgia Gas event 1985 SAM Championships Dateline Lawrenceviiie IL 10113185 Gil Morris exclaims Hows chase bike Gil expounds ageold wingflex problem months column Harry Murphy ignites T fuse K&B 3Sccpowered Max-AMliiion 450 epa ration official flight PAFB Dayton OH Ignitor must flameless electric ones showed us December 1985 issue aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248 ~bERSINDEX ADVERTISERSINDEX ADVE lSERStNDEX AMA Membership71 Academy Av Rsearch & Dev36158 Ace Radio Control127 Aerospace Composite Products157 Airtronics2 American Junior Aircraft Co148 Astro Flight34 Balsa USA85 Quay Barber Models150 Bergeron Enterprises152 Blue Ridge Machinery & Tools157 Byron Originals1 CH Electronics34 Cajun RC Products160 CaRa Products10 Carolina-Taffinder134 Johnnie Casburn Mfg51 Cheveron84 Circus Hobbies6-7 Cleveland Model Supply53 Eric Clutton156 Consumers Guide12 Coverite149 Cox Hobbies20 D&D Engineering159 DGA Designs126 Davey Systems Corp130 Davis Diesel Development53 Larry Dodge Aero Inc157 Dougs Hobby Shop142-145 Du-Bro Products Inc17 Dynathrust Props18 Electronic Design Corp80 FAI Model Supply47 FHS Supply Inc4 Fiberglass Master152 Futaba Corp America19 Flyline Models153 Fourmost Products16 Fox Manufacturing Co55 GM Precision Products81 Gas Model Products153 Gator RC Products36 Carl Goldberg Models21 Gorham Model Products5 Great Planes Model Mfg Co83 Gene C Head153 Harry B Higley & Sons146 Historic Aviation39 Hobby Barn120-121 Hobby Hideaway162 Hobby Horn51 Hobby Lobby International135 Hobbypoxy154 Hobby Woods80 Holleys Silent Flight156 Horizon Model Inc147 Howard B Huebl148 Ikon Northwest Co162 Indy RC Sales Inc136-138 J&J Sales160 Jacks Models146 Jomar158 JTec16 K&B Manufacturing Co150 K&S Engineering148 KandWEnt156 Kin Craft146 Knights Air122 Kustom Kraftsmanship8 Lone Star Models45 M&W Models130 MACS Products134 MARC Show49 Master Kit162 McDaniel RC Service36 Jim Messers Quality Model Prod160 Micro Mark124-125 Micro Model Engineering152 Midwest Products12 Model Rectifier CorpCovers 2&3 Mutchlers Hobbies128-1 29 NEPRO150 Neukraft Inc161 Nor-Ray Products Inc47 Okie Free Flight Flyer156 Old Timer Model Aircraft134 159 PK Products84 PAC Model Supply80 Peck-Polymers146 Pelican Enterprises55 Penn Valley Hobby Center148 Pica Products9 Polks Hobby86132-133 Pro-Tune Corp36 Progress Mfg Co139 RJL Industries34 Radio South141 RC Soaring Digest126 Repla-Tech International156 Robbe Modellsport75 Roush Mfg Co55 SR Batteries16 Sachs TG140 Satellite City13 Scale Plans Photo Service157 Science 8637 Shamrock Competition Imports131 Sheldons Hobby Shop20 Sidekick157 SigMfgCo1118 St Croix Models151 Standale Aircraft149 T&D Fiberglass Specialties20 Tatone Products Co18 Tidewater Hobby Enterprises51 Toledo RC Exposition153 Top Flite Models Inc10 Tower Hobbies15 WE Technical Services8 Williams Brothers10 Wilshire Model Center12 Windsor Propeller Co123 Wing Mfg Co53 World Engines155 Cover 4 Zenith Aviation35 Zimpro Marketing84 prices did locate esca lating Out sight 005 Also began notice lot dust already sup posed new batteries indicated turnover store shelves article what once Therefore could now spending good money not-so-fresh batteriesor maybe older batteries ones just discarded Consequently time seek alternatives result search assem bly accompanying photo shows old alongside new 'new~ plastic box containing four D-size alkaline flashlight batteries re tained plastic four-cell holder package wired produce three volts add some additional utility sophistica tion device mounted On-Off switch momentary push-button switch 0-5 volt meter female phono plug takeoff top panel parts found Radio Shack outlet store along commercial lead-out wire incorporates molded-on male phono plug end coiled twowire lead has medium-size alligator clips opposite end its six-foot length shelf-life alkaline batteries tremendous D-size alkaline batteries constantly sale discount depart ment stores permitting least dozen rtifl ~Jrih NV purchased price two old No 6 variety suspect effec tiveness booster system should encounter cranky-starting engine NEERS rur QUfRTER SCALE PLAJE IN QUFRTEk SCALE CA l1986 163 9 l-fIN& RULE j 7gv Playmate$650 RC Sport flier 3 RC channels 1 5- 25 engines spans 50 Hummin bird$750 FF Hot Class NB Gas competition plane won 85 Nats B-25B$400 CL Profile scale WW II bomber twin /2A engines spans 30A Na 193Silent CL Stoat mndel McDonald winner 187619801982 FAI World Champ$ 375 Na 239Sloe Birds RC Ken Willards fnrrnation plane 4-channel 10-pnwer$ 375 No 262Cranlimanter CL Crash-proof trainer two aizea1 5-30- 3540-power$ 125 No 302fisI F-iS AC Sarpelna 049 docted fan sport tiler far 2-channel Balna wiega tail lane stractare$ 275 No 3101930 Float Bipism RC Sport Scale far 35-40 4-channel Wingspan 56 scale Twa sheets$ 625 No 314Drake 8 AC Ken Willards flying boat 3-channel 1 5-powor Fly land removable gear$ 375 No 325TaylorCuic AC Ons SmIls Schoolyard-Scale 049a 2-3 channel Spans 50 in$ 350 No 332Zephye AC Small 2-chanoel glider hand-launch tow thermal slope soaring$ 200 No 355Laser 200 AC Sport Scale replica championship Anrohatic flier Uses 40 power 4-5 chaonel Two sheets$1075 No398Boo Bee 01 AC l-fatfkes latest y-scale spans 75 weighs 15 lb 90 larger Foarshents 00 doe$2225 No 414ElectrIc Sparky AC electric-powered ton flier 05 motor 3-chanoel AC scaled api 939 rubher-powerlanorite$ 950 No422Scooter AC Two-Meter Sailplane has won Nats event 19821983 plan othorcontests$ 550 No 430Irooshlo AC Zippy little aportuter 1 01 S power 3-channel AC$ 400 No 433Wotta Up AC Electdc-powered glider 2-3 channels 035 motor spans 5210$ 450 Na 430Crrdur FF Embryo Endurance rubber-power fun ship has hig-model characteristics 0 Ns 440Cavalec AC Old-Timer-f ihe new design has huge wing slow easy flights 35 power 3 channelsTwo shents $1 725 Ne 444Fleoholt AC posher canard sport/pattem oses 40 pooher engine 4-channel Has swept-forward loomwings 50 Na 447hA flea Amitca AC Old-Timer %A Texaco model 049 glow 2-channels$ 650 Na 452Boo Bee 2 AC Quarter-scale spans 71 io uses 90 power Foor sheets $1 600 No 453Smootlile ProSe CL Prohle rendition Bob Palmers soper-Stunter early Fifties 35 power$ 550 No 454Swoot P30 FF Neal stick-and-tissue Qaldoor Aubber P-3D-class medel contest-winner$ 200 No 457Spectra AC Electric-power 05-size motor uses 3 different wings sport soaring aerobatics$ 700 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels$ 650 No 451Trleter Bematermoc CL Famous unflapped StonIer late Forties Uses 35 engine$ 650 No 452Poodle Pt FF Jumbo Aohher Scale WW Italian observation plane$ 400 Ne 453Plotyhohalothon Vt AC hA Pylon racer uses lots file ply built-up structure strength lightoess$ 475 No 465Sloe Meet AC Fan-Ily sportster 40-size nogloes spans 52 io Lightweight structure$ 700 No 457AIce Spwt FF Aohher Scale design won 83 Nats designer Don Srull Wingspan 26 in$ 250 No 458SmooIhor CL Stonter 29135 power Design hased hyhrfd Smoothie/Nobler$ 675 No 470Strokoc AC Mid-wing spertater noon 40145 four-stroke engine spans 50% tail-dragger 50 No 474Pacer 15 FF Nordic A-i Towline Glider won 1963 World Champs$ 500 No 475Seoptipslcek CL Slow Combet med uses geodetic wing construction 36 engine Two-sheet plan has allparts patterns$ 400 No 477Meodoeto CL Sport Stonter uses sport 15 engine spans 35 in$ 325 No 470Battercap AC Cute elfin sportater uses micro 2-ch AC pulse-rudder Spans 27 020-035 power$ 300 Na 470FoorStreke 0oestar AC SportfAorobahcs ship has 920s styling uses 90 4-stroke engine spans 85 in2 sheets $1100 Na 480Oldlcaleos CL Fabeboas competition Stenter has 550 ml wing area flino TO 0401051 spans 47% in$ 600 Na 481Europa AC Sailplane tor PAl competition has liherglass fuselage loom wings wing flaps stabilator tail Spans 110 $ 700 Ne 4626oldoaAger AC SportlAerohahc medel looks like Golden Age sportater 60 engines spans 62 in$ 750 No403CBS Hawk UttnigIit FF Ouldoor Gas Scale plane uses CO-2 pnwer spans 29 in$ 300 No454AeroecO K AC Quarter-Scale 30s lightplune spans 9 ft uses 12 ca 2-cyl 4-strokn engine woighs II V lb Three sheets$1975 No 486M8eaAtwood Spoctat AC Sport-Scale Golden Age air-racer uses 21 engine spans 45 in$ 925 Ne 467Cap 21 AC Scale Aerobutic plane 40-size engine spans 62 Two sheets$1000 No 406MS-7 FP Jumbo Aubber Scale 011920-era Thamas Morse Scoot biplane spans 37 in$ 500 Ne 490Wookeedor AC Low-wing sport flier br 20-size 4-stroke engine spans 47% in$ 575 Ne 492CIrcelotor PP A-i Towline Glider spans 51 uses lihergluss tail boom circln-fuw ranchanism$ 250 No 493Sopor Draao AC Shoolder-wing sport tIler spans 66 uses 45-60 engine Two sheets$1 275 No 494NABOOB CL Very lightweight sportfStooter lImo unwind power alone 049-l 5 power Spun 39 in$ 400 No495FW-100 AC Hand-launched all-halo scalelike sportsterfor10-i5 negines two AC channels Spans3910$ 425 No 496P47 Thandeebott AC Other half Dngfight Dun has similar characteristics FW-1 90$ 425 No 497Manhattan PIeces FF Indoor robber cabin model ideal f beginners Spans 20% in$ 200 No 498Mhlwest Span Racor CL Simple ragged profile racer far 35 engine spans 36 in$ 350 No 4994-60 AC Doe Mathews great sport flier 60-size four-stroker engine spans 7010 Two sheets$1 275 No 500Piker BVt AC Sport scale model WW monoplane uses 90 br-stroke engine spans 93% Two sheets$1690 No 501EIodeckor CL Sport ocale medel early WW monoplane far %A puwer spans 23/ in$ 290 Ne 502BIll Wisters Vagahoad FP Sport tiler down-sized 02-puwered version nfl 940s cubin plane Spans 33% in$ 225 No 503Banchat AC Slopn-soorer spuas 6010 uses 2 AC channels$ 750 No 504Tarko Lance B PF Aubber-powerod scale model spans 19% in$ 150 No 505P38 Llghtideg CL Sport Scale fighter spans 65% weighs 10 lb uses twin 35s Two shnnts$1175 Circle numbers plans 193239 332386 438440 457460 468470 480481 488490 497498 504505 wish order 262 398 444 461 474 482 492 499 506 302 414 447 462 475 483 493 500 507 310 422 452 463 477 484 494 501 508 314326 430433 453454 465467 478479 486487 495496 502503 Plan price isciades firat class postage US delivery Ia Air Mali aver 300 milos orders outside US please add $2bU Air Mali 12b SuriaCe mall eaon pfan Make check monny order payable US funds Model Aviation c/s AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $____________________________________ NAME STREET CITY ZIP Simply press momentary switch button check resultant voltage output four cells contained within box club decal strategically placed adds nice cosmetic touch device well total assembly much lighter weight much convenient old booster systemand important hasnt failed yet Try Youll like too Newsletter month As stated last column intend spare little space occasions recognize missile grass roots media Free Flight newsletteras well unsung editors spite wind rain fear plagiarism keep lines communication open little nooks crannies Free Flight activity months hats off goes rather new publication SEKS Talks voice Smyrna Georgiabased South Eastern Kamikaze Squadron current prexy Bob Baker publication quarterly ably edited traveling sales representative Jim Walston parent club literally Old-Timer oriented represents Chapter 47 SAM Society Antique Modelers complete oriental letter-type SEKs symbols decals T-shirts quality publication chock full photos modeling hints area Free Flight activities abundance Georgia humor thrown words Editor Walston can become SEKs sup porter $275 per year ad dress SEKS Talks 725 Cooper Lake Road SE Smyrna GA 30080 Just fur piece down lane Gawg Perrymans place Ill bet Equal time 0-0-0-H smarts photo caption January issue page 62 Associate Editor Ross McMullen singled out writer stooge exercise subtle safe ty pitches really pricked pride couldnt get copy machine fast enough make copy photo question scribbled few nasties fire missile off ye olde editor next mail truck leaving East Coast As relayed Ross Im holding model over head arms length Im wearing safety glasses What would want Well anyway cant too careful however certain amount danger attached machine cer tainly mechanisms associated hobby demand respect again sure way play safe take up violin piano instead ya downwind . l work anymore RMcM Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 No 506 No 507 No 508 hi 0 Cd 8 0 c 0 -0 00 Zn Os oh0 0 oh coo C -- ho 0 nb 00 0 2 Co C 0 V 00 ho 0 00 2C 005 U or eeC J0 EO nm Sc N USTATE 164 Model Aviation
Edition: Model Aviation - 1986/04
Page Numbers: 72, 73, 162, 163, 164
Free Flight Duration Harry Murphy INSPIRATION day after Christ mas begin column Outside nickel-size snowflakes have falling heavily hour pesky things have already built up fluffy white blanket ground depth two three inches As family out run ning around returning gifts either too large too small sit staring through window workshop nursing miserable head cold wondering ever proved no two snowflakes ever alike Anyhow year-end yuletide sea sonal rush ebbs once again time clean out field box spruce up workshop dust off workbench make ready begin building new model always start New Years day am superstitious per son beginning new year start ing new model has tradition years care ad mit Some years effort might consist pad full computations few lines drawn shelf paper other years might have meant actual construction stab wing half beginning fuselage Over-the-top new year also time ponder lessons learned experi ence mental flinches possible blunders mistakes made Down previous contest season Any design errors remedied before action begins once again ensuing months can probably expect similar results per previous season case last season particular ly frustrating Having spent previous winter stripping old AMA gas-powered workhorses fuel-soaked silkspan tissue coverings replac ing brand another heat-shrink plastic films subsequently spent entire flying season fighting off effects phenomenon call 72Model Aviation C ction Flex high-purformai discussed onths column discusses keep hot Power ship climbing right Older planes didnt have tremendous power higher speeds generated current-day engines Englands Dunham Engineerings contri bution replica diesel market Elfin 249cc its also SAM-eligible OT Ignition engines use booster batteries during starting Harry continued use triedand-proven twin-#6-celi pack L until recentlywhen found price skyrocketing shortage fresh ones stores now uses homemade unit righE inside four alkaline 0-cellsobtainable everywhere discount prices wing flex learned hard way depending design construction wing gas-powered model transition silk silkspan MonoKote Micafilm may out pain plastic films certainly superlatively fuel-resistant compared traditional coverings price may have paid increasing con structed rigidity wingwhich turn adds unwanted weight Admittedly rather lulled myself trap previous efforts using iron-on films amply-braced structures 10%-thick airfoil sections 85 situation different story 85%-thick sections much-lighterweight structures models difficul ty staying power patterns would often go over-the-top wander off cross-country under power model speed increased about midpoint engine runs As result exchange notes super flier Gil Morris past month must have noted huge tear stains stationery explained dilemma return received five-page reply subject following itemized excerpts Gil sez 1 Micafilm like Mylar keeps out wind rain contributes no struc tural strength Silkspan dope still best coverings structural purposes torsional stength 2 model going straight up under power position CG Center Gravity really doesnt matter acting someplace pylon parallel fore-and-aft axis fuselage no consequence down equals up zero-lift condition However what important wing remains zero-lift condition lifting model would loop conversely zero-lift condition forward pitch moment wants twist wing toward washoutthus causing nose drop over the-top effect follows 3 A wing pitching moment ap plied will first diverge twist toward washout twist sizable will resonate flutter frequency determined spring constant wing structure weight distribution wing itself Actually lucky wing flutters because instant ly know may have diverging problem sneaky ones diverge flutter can lead drink Mine didnt flutter Gil What brand booze recommend HM 4 Originally Toothpicks design would occasionally go over-the-top kept beefing up wing until im possible twistand still went over the-top took two years learn stabilizer airfoil too thick would produce same symptoms came thinning stab airfoil case now use either semisymmetrical full-symmetrical stab air foils 5 thing look iswhen engine quits nose momentarily pulls up wing may diverging stab airfoil too thick both 6Correcting stab simple necessary strip covering round bottom ribs bit recover wing may take some ingsuch planking leading edge back main spar both top bottom thereby making section closed box D-shaped section box isnt closed wont much good Rather use planking prefer wide main spar web sides closed-box configuration Diago nal ribs help too 7 I feel time-of-day has something problem well model suspect having wing flex difficulties should find likely go over-the-top cool air morning evening midday because engine putting out horsepower higher volumetric efficiency intakes weight Continued page 162 April 1986 73 Ed Konefes packs turns Lanzo Stick Wright Field contest nonGas fliers sure keep clothes clean Eds Buzzard Bombshell man Meredith Chamberlain checks out fuel shutoff Britishdeslgned Os Max 19powered Crescendo Sturgis Ml contest Plane won its Nostalgia Gas event 1985 SAM Championships Dateline Lawrenceviiie IL 10113185 Gil Morris exclaims Hows chase bike Gil expounds ageold wingflex problem months column Harry Murphy ignites T fuse K&B 3Sccpowered Max-AMliiion 450 epa ration official flight PAFB Dayton OH Ignitor must flameless electric ones showed us December 1985 issue aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248 ~bERSINDEX ADVERTISERSINDEX ADVE lSERStNDEX AMA Membership71 Academy Av Rsearch & Dev36158 Ace Radio Control127 Aerospace Composite Products157 Airtronics2 American Junior Aircraft Co148 Astro Flight34 Balsa USA85 Quay Barber Models150 Bergeron Enterprises152 Blue Ridge Machinery & Tools157 Byron Originals1 CH Electronics34 Cajun RC Products160 CaRa Products10 Carolina-Taffinder134 Johnnie Casburn Mfg51 Cheveron84 Circus Hobbies6-7 Cleveland Model Supply53 Eric Clutton156 Consumers Guide12 Coverite149 Cox Hobbies20 D&D Engineering159 DGA Designs126 Davey Systems Corp130 Davis Diesel Development53 Larry Dodge Aero Inc157 Dougs Hobby Shop142-145 Du-Bro Products Inc17 Dynathrust Props18 Electronic Design Corp80 FAI Model Supply47 FHS Supply Inc4 Fiberglass Master152 Futaba Corp America19 Flyline Models153 Fourmost Products16 Fox Manufacturing Co55 GM Precision Products81 Gas Model Products153 Gator RC Products36 Carl Goldberg Models21 Gorham Model Products5 Great Planes Model Mfg Co83 Gene C Head153 Harry B Higley & Sons146 Historic Aviation39 Hobby Barn120-121 Hobby Hideaway162 Hobby Horn51 Hobby Lobby International135 Hobbypoxy154 Hobby Woods80 Holleys Silent Flight156 Horizon Model Inc147 Howard B Huebl148 Ikon Northwest Co162 Indy RC Sales Inc136-138 J&J Sales160 Jacks Models146 Jomar158 JTec16 K&B Manufacturing Co150 K&S Engineering148 KandWEnt156 Kin Craft146 Knights Air122 Kustom Kraftsmanship8 Lone Star Models45 M&W Models130 MACS Products134 MARC Show49 Master Kit162 McDaniel RC Service36 Jim Messers Quality Model Prod160 Micro Mark124-125 Micro Model Engineering152 Midwest Products12 Model Rectifier CorpCovers 2&3 Mutchlers Hobbies128-1 29 NEPRO150 Neukraft Inc161 Nor-Ray Products Inc47 Okie Free Flight Flyer156 Old Timer Model Aircraft134 159 PK Products84 PAC Model Supply80 Peck-Polymers146 Pelican Enterprises55 Penn Valley Hobby Center148 Pica Products9 Polks Hobby86132-133 Pro-Tune Corp36 Progress Mfg Co139 RJL Industries34 Radio South141 RC Soaring Digest126 Repla-Tech International156 Robbe Modellsport75 Roush Mfg Co55 SR Batteries16 Sachs TG140 Satellite City13 Scale Plans Photo Service157 Science 8637 Shamrock Competition Imports131 Sheldons Hobby Shop20 Sidekick157 SigMfgCo1118 St Croix Models151 Standale Aircraft149 T&D Fiberglass Specialties20 Tatone Products Co18 Tidewater Hobby Enterprises51 Toledo RC Exposition153 Top Flite Models Inc10 Tower Hobbies15 WE Technical Services8 Williams Brothers10 Wilshire Model Center12 Windsor Propeller Co123 Wing Mfg Co53 World Engines155 Cover 4 Zenith Aviation35 Zimpro Marketing84 prices did locate esca lating Out sight 005 Also began notice lot dust already sup posed new batteries indicated turnover store shelves article what once Therefore could now spending good money not-so-fresh batteriesor maybe older batteries ones just discarded Consequently time seek alternatives result search assem bly accompanying photo shows old alongside new 'new~ plastic box containing four D-size alkaline flashlight batteries re tained plastic four-cell holder package wired produce three volts add some additional utility sophistica tion device mounted On-Off switch momentary push-button switch 0-5 volt meter female phono plug takeoff top panel parts found Radio Shack outlet store along commercial lead-out wire incorporates molded-on male phono plug end coiled twowire lead has medium-size alligator clips opposite end its six-foot length shelf-life alkaline batteries tremendous D-size alkaline batteries constantly sale discount depart ment stores permitting least dozen rtifl ~Jrih NV purchased price two old No 6 variety suspect effec tiveness booster system should encounter cranky-starting engine NEERS rur QUfRTER SCALE PLAJE IN QUFRTEk SCALE CA l1986 163 9 l-fIN& RULE j 7gv Playmate$650 RC Sport flier 3 RC channels 1 5- 25 engines spans 50 Hummin bird$750 FF Hot Class NB Gas competition plane won 85 Nats B-25B$400 CL Profile scale WW II bomber twin /2A engines spans 30A Na 193Silent CL Stoat mndel McDonald winner 187619801982 FAI World Champ$ 375 Na 239Sloe Birds RC Ken Willards fnrrnation plane 4-channel 10-pnwer$ 375 No 262Cranlimanter CL Crash-proof trainer two aizea1 5-30- 3540-power$ 125 No 302fisI F-iS AC Sarpelna 049 docted fan sport tiler far 2-channel Balna wiega tail lane stractare$ 275 No 3101930 Float Bipism RC Sport Scale far 35-40 4-channel Wingspan 56 scale Twa sheets$ 625 No 314Drake 8 AC Ken Willards flying boat 3-channel 1 5-powor Fly land removable gear$ 375 No 325TaylorCuic AC Ons SmIls Schoolyard-Scale 049a 2-3 channel Spans 50 in$ 350 No 332Zephye AC Small 2-chanoel glider hand-launch tow thermal slope soaring$ 200 No 355Laser 200 AC Sport Scale replica championship Anrohatic flier Uses 40 power 4-5 chaonel Two sheets$1075 No398Boo Bee 01 AC l-fatfkes latest y-scale spans 75 weighs 15 lb 90 larger Foarshents 00 doe$2225 No 414ElectrIc Sparky AC electric-powered ton flier 05 motor 3-chanoel AC scaled api 939 rubher-powerlanorite$ 950 No422Scooter AC Two-Meter Sailplane has won Nats event 19821983 plan othorcontests$ 550 No 430Irooshlo AC Zippy little aportuter 1 01 S power 3-channel AC$ 400 No 433Wotta Up AC Electdc-powered glider 2-3 channels 035 motor spans 5210$ 450 Na 430Crrdur FF Embryo Endurance rubber-power fun ship has hig-model characteristics 0 Ns 440Cavalec AC Old-Timer-f ihe new design has huge wing slow easy flights 35 power 3 channelsTwo shents $1 725 Ne 444Fleoholt AC posher canard sport/pattem oses 40 pooher engine 4-channel Has swept-forward loomwings 50 Na 447hA flea Amitca AC Old-Timer %A Texaco model 049 glow 2-channels$ 650 Na 452Boo Bee 2 AC Quarter-scale spans 71 io uses 90 power Foor sheets $1 600 No 453Smootlile ProSe CL Prohle rendition Bob Palmers soper-Stunter early Fifties 35 power$ 550 No 454Swoot P30 FF Neal stick-and-tissue Qaldoor Aubber P-3D-class medel contest-winner$ 200 No 457Spectra AC Electric-power 05-size motor uses 3 different wings sport soaring aerobatics$ 700 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels$ 650 No 451Trleter Bematermoc CL Famous unflapped StonIer late Forties Uses 35 engine$ 650 No 452Poodle Pt FF Jumbo Aohher Scale WW Italian observation plane$ 400 Ne 453Plotyhohalothon Vt AC hA Pylon racer uses lots file ply built-up structure strength lightoess$ 475 No 465Sloe Meet AC Fan-Ily sportster 40-size nogloes spans 52 io Lightweight structure$ 700 No 457AIce Spwt FF Aohher Scale design won 83 Nats designer Don Srull Wingspan 26 in$ 250 No 458SmooIhor CL Stonter 29135 power Design hased hyhrfd Smoothie/Nobler$ 675 No 470Strokoc AC Mid-wing spertater noon 40145 four-stroke engine spans 50% tail-dragger 50 No 474Pacer 15 FF Nordic A-i Towline Glider won 1963 World Champs$ 500 No 475Seoptipslcek CL Slow Combet med uses geodetic wing construction 36 engine Two-sheet plan has allparts patterns$ 400 No 477Meodoeto CL Sport Stonter uses sport 15 engine spans 35 in$ 325 No 470Battercap AC Cute elfin sportater uses micro 2-ch AC pulse-rudder Spans 27 020-035 power$ 300 Na 470FoorStreke 0oestar AC SportfAorobahcs ship has 920s styling uses 90 4-stroke engine spans 85 in2 sheets $1100 Na 480Oldlcaleos CL Fabeboas competition Stenter has 550 ml wing area flino TO 0401051 spans 47% in$ 600 Na 481Europa AC Sailplane tor PAl competition has liherglass fuselage loom wings wing flaps stabilator tail Spans 110 $ 700 Ne 4626oldoaAger AC SportlAerohahc medel looks like Golden Age sportater 60 engines spans 62 in$ 750 No403CBS Hawk UttnigIit FF Ouldoor Gas Scale plane uses CO-2 pnwer spans 29 in$ 300 No454AeroecO K AC Quarter-Scale 30s lightplune spans 9 ft uses 12 ca 2-cyl 4-strokn engine woighs II V lb Three sheets$1975 No 486M8eaAtwood Spoctat AC Sport-Scale Golden Age air-racer uses 21 engine spans 45 in$ 925 Ne 467Cap 21 AC Scale Aerobutic plane 40-size engine spans 62 Two sheets$1000 No 406MS-7 FP Jumbo Aubber Scale 011920-era Thamas Morse Scoot biplane spans 37 in$ 500 Ne 490Wookeedor AC Low-wing sport flier br 20-size 4-stroke engine spans 47% in$ 575 Ne 492CIrcelotor PP A-i Towline Glider spans 51 uses lihergluss tail boom circln-fuw ranchanism$ 250 No 493Sopor Draao AC Shoolder-wing sport tIler spans 66 uses 45-60 engine Two sheets$1 275 No 494NABOOB CL Very lightweight sportfStooter lImo unwind power alone 049-l 5 power Spun 39 in$ 400 No495FW-100 AC Hand-launched all-halo scalelike sportsterfor10-i5 negines two AC channels Spans3910$ 425 No 496P47 Thandeebott AC Other half Dngfight Dun has similar characteristics FW-1 90$ 425 No 497Manhattan PIeces FF Indoor robber cabin model ideal f beginners Spans 20% in$ 200 No 498Mhlwest Span Racor CL Simple ragged profile racer far 35 engine spans 36 in$ 350 No 4994-60 AC Doe Mathews great sport flier 60-size four-stroker engine spans 7010 Two sheets$1 275 No 500Piker BVt AC Sport scale model WW monoplane uses 90 br-stroke engine spans 93% Two sheets$1690 No 501EIodeckor CL Sport ocale medel early WW monoplane far %A puwer spans 23/ in$ 290 Ne 502BIll Wisters Vagahoad FP Sport tiler down-sized 02-puwered version nfl 940s cubin plane Spans 33% in$ 225 No 503Banchat AC Slopn-soorer spuas 6010 uses 2 AC channels$ 750 No 504Tarko Lance B PF Aubber-powerod scale model spans 19% in$ 150 No 505P38 Llghtideg CL Sport Scale fighter spans 65% weighs 10 lb uses twin 35s Two shnnts$1175 Circle numbers plans 193239 332386 438440 457460 468470 480481 488490 497498 504505 wish order 262 398 444 461 474 482 492 499 506 302 414 447 462 475 483 493 500 507 310 422 452 463 477 484 494 501 508 314326 430433 453454 465467 478479 486487 495496 502503 Plan price isciades firat class postage US delivery Ia Air Mali aver 300 milos orders outside US please add $2bU Air Mali 12b SuriaCe mall eaon pfan Make check monny order payable US funds Model Aviation c/s AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $____________________________________ NAME STREET CITY ZIP Simply press momentary switch button check resultant voltage output four cells contained within box club decal strategically placed adds nice cosmetic touch device well total assembly much lighter weight much convenient old booster systemand important hasnt failed yet Try Youll like too Newsletter month As stated last column intend spare little space occasions recognize missile grass roots media Free Flight newsletteras well unsung editors spite wind rain fear plagiarism keep lines communication open little nooks crannies Free Flight activity months hats off goes rather new publication SEKS Talks voice Smyrna Georgiabased South Eastern Kamikaze Squadron current prexy Bob Baker publication quarterly ably edited traveling sales representative Jim Walston parent club literally Old-Timer oriented represents Chapter 47 SAM Society Antique Modelers complete oriental letter-type SEKs symbols decals T-shirts quality publication chock full photos modeling hints area Free Flight activities abundance Georgia humor thrown words Editor Walston can become SEKs sup porter $275 per year ad dress SEKS Talks 725 Cooper Lake Road SE Smyrna GA 30080 Just fur piece down lane Gawg Perrymans place Ill bet Equal time 0-0-0-H smarts photo caption January issue page 62 Associate Editor Ross McMullen singled out writer stooge exercise subtle safe ty pitches really pricked pride couldnt get copy machine fast enough make copy photo question scribbled few nasties fire missile off ye olde editor next mail truck leaving East Coast As relayed Ross Im holding model over head arms length Im wearing safety glasses What would want Well anyway cant too careful however certain amount danger attached machine cer tainly mechanisms associated hobby demand respect again sure way play safe take up violin piano instead ya downwind . l work anymore RMcM Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 No 506 No 507 No 508 hi 0 Cd 8 0 c 0 -0 00 Zn Os oh0 0 oh coo C -- ho 0 nb 00 0 2 Co C 0 V 00 ho 0 00 2C 005 U or eeC J0 EO nm Sc N USTATE 164 Model Aviation
Edition: Model Aviation - 1986/04
Page Numbers: 72, 73, 162, 163, 164
Free Flight Duration Harry Murphy INSPIRATION day after Christ mas begin column Outside nickel-size snowflakes have falling heavily hour pesky things have already built up fluffy white blanket ground depth two three inches As family out run ning around returning gifts either too large too small sit staring through window workshop nursing miserable head cold wondering ever proved no two snowflakes ever alike Anyhow year-end yuletide sea sonal rush ebbs once again time clean out field box spruce up workshop dust off workbench make ready begin building new model always start New Years day am superstitious per son beginning new year start ing new model has tradition years care ad mit Some years effort might consist pad full computations few lines drawn shelf paper other years might have meant actual construction stab wing half beginning fuselage Over-the-top new year also time ponder lessons learned experi ence mental flinches possible blunders mistakes made Down previous contest season Any design errors remedied before action begins once again ensuing months can probably expect similar results per previous season case last season particular ly frustrating Having spent previous winter stripping old AMA gas-powered workhorses fuel-soaked silkspan tissue coverings replac ing brand another heat-shrink plastic films subsequently spent entire flying season fighting off effects phenomenon call 72Model Aviation C ction Flex high-purformai discussed onths column discusses keep hot Power ship climbing right Older planes didnt have tremendous power higher speeds generated current-day engines Englands Dunham Engineerings contri bution replica diesel market Elfin 249cc its also SAM-eligible OT Ignition engines use booster batteries during starting Harry continued use triedand-proven twin-#6-celi pack L until recentlywhen found price skyrocketing shortage fresh ones stores now uses homemade unit righE inside four alkaline 0-cellsobtainable everywhere discount prices wing flex learned hard way depending design construction wing gas-powered model transition silk silkspan MonoKote Micafilm may out pain plastic films certainly superlatively fuel-resistant compared traditional coverings price may have paid increasing con structed rigidity wingwhich turn adds unwanted weight Admittedly rather lulled myself trap previous efforts using iron-on films amply-braced structures 10%-thick airfoil sections 85 situation different story 85%-thick sections much-lighterweight structures models difficul ty staying power patterns would often go over-the-top wander off cross-country under power model speed increased about midpoint engine runs As result exchange notes super flier Gil Morris past month must have noted huge tear stains stationery explained dilemma return received five-page reply subject following itemized excerpts Gil sez 1 Micafilm like Mylar keeps out wind rain contributes no struc tural strength Silkspan dope still best coverings structural purposes torsional stength 2 model going straight up under power position CG Center Gravity really doesnt matter acting someplace pylon parallel fore-and-aft axis fuselage no consequence down equals up zero-lift condition However what important wing remains zero-lift condition lifting model would loop conversely zero-lift condition forward pitch moment wants twist wing toward washoutthus causing nose drop over the-top effect follows 3 A wing pitching moment ap plied will first diverge twist toward washout twist sizable will resonate flutter frequency determined spring constant wing structure weight distribution wing itself Actually lucky wing flutters because instant ly know may have diverging problem sneaky ones diverge flutter can lead drink Mine didnt flutter Gil What brand booze recommend HM 4 Originally Toothpicks design would occasionally go over-the-top kept beefing up wing until im possible twistand still went over the-top took two years learn stabilizer airfoil too thick would produce same symptoms came thinning stab airfoil case now use either semisymmetrical full-symmetrical stab air foils 5 thing look iswhen engine quits nose momentarily pulls up wing may diverging stab airfoil too thick both 6Correcting stab simple necessary strip covering round bottom ribs bit recover wing may take some ingsuch planking leading edge back main spar both top bottom thereby making section closed box D-shaped section box isnt closed wont much good Rather use planking prefer wide main spar web sides closed-box configuration Diago nal ribs help too 7 I feel time-of-day has something problem well model suspect having wing flex difficulties should find likely go over-the-top cool air morning evening midday because engine putting out horsepower higher volumetric efficiency intakes weight Continued page 162 April 1986 73 Ed Konefes packs turns Lanzo Stick Wright Field contest nonGas fliers sure keep clothes clean Eds Buzzard Bombshell man Meredith Chamberlain checks out fuel shutoff Britishdeslgned Os Max 19powered Crescendo Sturgis Ml contest Plane won its Nostalgia Gas event 1985 SAM Championships Dateline Lawrenceviiie IL 10113185 Gil Morris exclaims Hows chase bike Gil expounds ageold wingflex problem months column Harry Murphy ignites T fuse K&B 3Sccpowered Max-AMliiion 450 epa ration official flight PAFB Dayton OH Ignitor must flameless electric ones showed us December 1985 issue aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248 ~bERSINDEX ADVERTISERSINDEX ADVE lSERStNDEX AMA Membership71 Academy Av Rsearch & Dev36158 Ace Radio Control127 Aerospace Composite Products157 Airtronics2 American Junior Aircraft Co148 Astro Flight34 Balsa USA85 Quay Barber Models150 Bergeron Enterprises152 Blue Ridge Machinery & Tools157 Byron Originals1 CH Electronics34 Cajun RC Products160 CaRa Products10 Carolina-Taffinder134 Johnnie Casburn Mfg51 Cheveron84 Circus Hobbies6-7 Cleveland Model Supply53 Eric Clutton156 Consumers Guide12 Coverite149 Cox Hobbies20 D&D Engineering159 DGA Designs126 Davey Systems Corp130 Davis Diesel Development53 Larry Dodge Aero Inc157 Dougs Hobby Shop142-145 Du-Bro Products Inc17 Dynathrust Props18 Electronic Design Corp80 FAI Model Supply47 FHS Supply Inc4 Fiberglass Master152 Futaba Corp America19 Flyline Models153 Fourmost Products16 Fox Manufacturing Co55 GM Precision Products81 Gas Model Products153 Gator RC Products36 Carl Goldberg Models21 Gorham Model Products5 Great Planes Model Mfg Co83 Gene C Head153 Harry B Higley & Sons146 Historic Aviation39 Hobby Barn120-121 Hobby Hideaway162 Hobby Horn51 Hobby Lobby International135 Hobbypoxy154 Hobby Woods80 Holleys Silent Flight156 Horizon Model Inc147 Howard B Huebl148 Ikon Northwest Co162 Indy RC Sales Inc136-138 J&J Sales160 Jacks Models146 Jomar158 JTec16 K&B Manufacturing Co150 K&S Engineering148 KandWEnt156 Kin Craft146 Knights Air122 Kustom Kraftsmanship8 Lone Star Models45 M&W Models130 MACS Products134 MARC Show49 Master Kit162 McDaniel RC Service36 Jim Messers Quality Model Prod160 Micro Mark124-125 Micro Model Engineering152 Midwest Products12 Model Rectifier CorpCovers 2&3 Mutchlers Hobbies128-1 29 NEPRO150 Neukraft Inc161 Nor-Ray Products Inc47 Okie Free Flight Flyer156 Old Timer Model Aircraft134 159 PK Products84 PAC Model Supply80 Peck-Polymers146 Pelican Enterprises55 Penn Valley Hobby Center148 Pica Products9 Polks Hobby86132-133 Pro-Tune Corp36 Progress Mfg Co139 RJL Industries34 Radio South141 RC Soaring Digest126 Repla-Tech International156 Robbe Modellsport75 Roush Mfg Co55 SR Batteries16 Sachs TG140 Satellite City13 Scale Plans Photo Service157 Science 8637 Shamrock Competition Imports131 Sheldons Hobby Shop20 Sidekick157 SigMfgCo1118 St Croix Models151 Standale Aircraft149 T&D Fiberglass Specialties20 Tatone Products Co18 Tidewater Hobby Enterprises51 Toledo RC Exposition153 Top Flite Models Inc10 Tower Hobbies15 WE Technical Services8 Williams Brothers10 Wilshire Model Center12 Windsor Propeller Co123 Wing Mfg Co53 World Engines155 Cover 4 Zenith Aviation35 Zimpro Marketing84 prices did locate esca lating Out sight 005 Also began notice lot dust already sup posed new batteries indicated turnover store shelves article what once Therefore could now spending good money not-so-fresh batteriesor maybe older batteries ones just discarded Consequently time seek alternatives result search assem bly accompanying photo shows old alongside new 'new~ plastic box containing four D-size alkaline flashlight batteries re tained plastic four-cell holder package wired produce three volts add some additional utility sophistica tion device mounted On-Off switch momentary push-button switch 0-5 volt meter female phono plug takeoff top panel parts found Radio Shack outlet store along commercial lead-out wire incorporates molded-on male phono plug end coiled twowire lead has medium-size alligator clips opposite end its six-foot length shelf-life alkaline batteries tremendous D-size alkaline batteries constantly sale discount depart ment stores permitting least dozen rtifl ~Jrih NV purchased price two old No 6 variety suspect effec tiveness booster system should encounter cranky-starting engine NEERS rur QUfRTER SCALE PLAJE IN QUFRTEk SCALE CA l1986 163 9 l-fIN& RULE j 7gv Playmate$650 RC Sport flier 3 RC channels 1 5- 25 engines spans 50 Hummin bird$750 FF Hot Class NB Gas competition plane won 85 Nats B-25B$400 CL Profile scale WW II bomber twin /2A engines spans 30A Na 193Silent CL Stoat mndel McDonald winner 187619801982 FAI World Champ$ 375 Na 239Sloe Birds RC Ken Willards fnrrnation plane 4-channel 10-pnwer$ 375 No 262Cranlimanter CL Crash-proof trainer two aizea1 5-30- 3540-power$ 125 No 302fisI F-iS AC Sarpelna 049 docted fan sport tiler far 2-channel Balna wiega tail lane stractare$ 275 No 3101930 Float Bipism RC Sport Scale far 35-40 4-channel Wingspan 56 scale Twa sheets$ 625 No 314Drake 8 AC Ken Willards flying boat 3-channel 1 5-powor Fly land removable gear$ 375 No 325TaylorCuic AC Ons SmIls Schoolyard-Scale 049a 2-3 channel Spans 50 in$ 350 No 332Zephye AC Small 2-chanoel glider hand-launch tow thermal slope soaring$ 200 No 355Laser 200 AC Sport Scale replica championship Anrohatic flier Uses 40 power 4-5 chaonel Two sheets$1075 No398Boo Bee 01 AC l-fatfkes latest y-scale spans 75 weighs 15 lb 90 larger Foarshents 00 doe$2225 No 414ElectrIc Sparky AC electric-powered ton flier 05 motor 3-chanoel AC scaled api 939 rubher-powerlanorite$ 950 No422Scooter AC Two-Meter Sailplane has won Nats event 19821983 plan othorcontests$ 550 No 430Irooshlo AC Zippy little aportuter 1 01 S power 3-channel AC$ 400 No 433Wotta Up AC Electdc-powered glider 2-3 channels 035 motor spans 5210$ 450 Na 430Crrdur FF Embryo Endurance rubber-power fun ship has hig-model characteristics 0 Ns 440Cavalec AC Old-Timer-f ihe new design has huge wing slow easy flights 35 power 3 channelsTwo shents $1 725 Ne 444Fleoholt AC posher canard sport/pattem oses 40 pooher engine 4-channel Has swept-forward loomwings 50 Na 447hA flea Amitca AC Old-Timer %A Texaco model 049 glow 2-channels$ 650 Na 452Boo Bee 2 AC Quarter-scale spans 71 io uses 90 power Foor sheets $1 600 No 453Smootlile ProSe CL Prohle rendition Bob Palmers soper-Stunter early Fifties 35 power$ 550 No 454Swoot P30 FF Neal stick-and-tissue Qaldoor Aubber P-3D-class medel contest-winner$ 200 No 457Spectra AC Electric-power 05-size motor uses 3 different wings sport soaring aerobatics$ 700 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels$ 650 No 451Trleter Bematermoc CL Famous unflapped StonIer late Forties Uses 35 engine$ 650 No 452Poodle Pt FF Jumbo Aohher Scale WW Italian observation plane$ 400 Ne 453Plotyhohalothon Vt AC hA Pylon racer uses lots file ply built-up structure strength lightoess$ 475 No 465Sloe Meet AC Fan-Ily sportster 40-size nogloes spans 52 io Lightweight structure$ 700 No 457AIce Spwt FF Aohher Scale design won 83 Nats designer Don Srull Wingspan 26 in$ 250 No 458SmooIhor CL Stonter 29135 power Design hased hyhrfd Smoothie/Nobler$ 675 No 470Strokoc AC Mid-wing spertater noon 40145 four-stroke engine spans 50% tail-dragger 50 No 474Pacer 15 FF Nordic A-i Towline Glider won 1963 World Champs$ 500 No 475Seoptipslcek CL Slow Combet med uses geodetic wing construction 36 engine Two-sheet plan has allparts patterns$ 400 No 477Meodoeto CL Sport Stonter uses sport 15 engine spans 35 in$ 325 No 470Battercap AC Cute elfin sportater uses micro 2-ch AC pulse-rudder Spans 27 020-035 power$ 300 Na 470FoorStreke 0oestar AC SportfAorobahcs ship has 920s styling uses 90 4-stroke engine spans 85 in2 sheets $1100 Na 480Oldlcaleos CL Fabeboas competition Stenter has 550 ml wing area flino TO 0401051 spans 47% in$ 600 Na 481Europa AC Sailplane tor PAl competition has liherglass fuselage loom wings wing flaps stabilator tail Spans 110 $ 700 Ne 4626oldoaAger AC SportlAerohahc medel looks like Golden Age sportater 60 engines spans 62 in$ 750 No403CBS Hawk UttnigIit FF Ouldoor Gas Scale plane uses CO-2 pnwer spans 29 in$ 300 No454AeroecO K AC Quarter-Scale 30s lightplune spans 9 ft uses 12 ca 2-cyl 4-strokn engine woighs II V lb Three sheets$1975 No 486M8eaAtwood Spoctat AC Sport-Scale Golden Age air-racer uses 21 engine spans 45 in$ 925 Ne 467Cap 21 AC Scale Aerobutic plane 40-size engine spans 62 Two sheets$1000 No 406MS-7 FP Jumbo Aubber Scale 011920-era Thamas Morse Scoot biplane spans 37 in$ 500 Ne 490Wookeedor AC Low-wing sport flier br 20-size 4-stroke engine spans 47% in$ 575 Ne 492CIrcelotor PP A-i Towline Glider spans 51 uses lihergluss tail boom circln-fuw ranchanism$ 250 No 493Sopor Draao AC Shoolder-wing sport tIler spans 66 uses 45-60 engine Two sheets$1 275 No 494NABOOB CL Very lightweight sportfStooter lImo unwind power alone 049-l 5 power Spun 39 in$ 400 No495FW-100 AC Hand-launched all-halo scalelike sportsterfor10-i5 negines two AC channels Spans3910$ 425 No 496P47 Thandeebott AC Other half Dngfight Dun has similar characteristics FW-1 90$ 425 No 497Manhattan PIeces FF Indoor robber cabin model ideal f beginners Spans 20% in$ 200 No 498Mhlwest Span Racor CL Simple ragged profile racer far 35 engine spans 36 in$ 350 No 4994-60 AC Doe Mathews great sport flier 60-size four-stroker engine spans 7010 Two sheets$1 275 No 500Piker BVt AC Sport scale model WW monoplane uses 90 br-stroke engine spans 93% Two sheets$1690 No 501EIodeckor CL Sport ocale medel early WW monoplane far %A puwer spans 23/ in$ 290 Ne 502BIll Wisters Vagahoad FP Sport tiler down-sized 02-puwered version nfl 940s cubin plane Spans 33% in$ 225 No 503Banchat AC Slopn-soorer spuas 6010 uses 2 AC channels$ 750 No 504Tarko Lance B PF Aubber-powerod scale model spans 19% in$ 150 No 505P38 Llghtideg CL Sport Scale fighter spans 65% weighs 10 lb uses twin 35s Two shnnts$1175 Circle numbers plans 193239 332386 438440 457460 468470 480481 488490 497498 504505 wish order 262 398 444 461 474 482 492 499 506 302 414 447 462 475 483 493 500 507 310 422 452 463 477 484 494 501 508 314326 430433 453454 465467 478479 486487 495496 502503 Plan price isciades firat class postage US delivery Ia Air Mali aver 300 milos orders outside US please add $2bU Air Mali 12b SuriaCe mall eaon pfan Make check monny order payable US funds Model Aviation c/s AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $____________________________________ NAME STREET CITY ZIP Simply press momentary switch button check resultant voltage output four cells contained within box club decal strategically placed adds nice cosmetic touch device well total assembly much lighter weight much convenient old booster systemand important hasnt failed yet Try Youll like too Newsletter month As stated last column intend spare little space occasions recognize missile grass roots media Free Flight newsletteras well unsung editors spite wind rain fear plagiarism keep lines communication open little nooks crannies Free Flight activity months hats off goes rather new publication SEKS Talks voice Smyrna Georgiabased South Eastern Kamikaze Squadron current prexy Bob Baker publication quarterly ably edited traveling sales representative Jim Walston parent club literally Old-Timer oriented represents Chapter 47 SAM Society Antique Modelers complete oriental letter-type SEKs symbols decals T-shirts quality publication chock full photos modeling hints area Free Flight activities abundance Georgia humor thrown words Editor Walston can become SEKs sup porter $275 per year ad dress SEKS Talks 725 Cooper Lake Road SE Smyrna GA 30080 Just fur piece down lane Gawg Perrymans place Ill bet Equal time 0-0-0-H smarts photo caption January issue page 62 Associate Editor Ross McMullen singled out writer stooge exercise subtle safe ty pitches really pricked pride couldnt get copy machine fast enough make copy photo question scribbled few nasties fire missile off ye olde editor next mail truck leaving East Coast As relayed Ross Im holding model over head arms length Im wearing safety glasses What would want Well anyway cant too careful however certain amount danger attached machine cer tainly mechanisms associated hobby demand respect again sure way play safe take up violin piano instead ya downwind . l work anymore RMcM Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 No 506 No 507 No 508 hi 0 Cd 8 0 c 0 -0 00 Zn Os oh0 0 oh coo C -- ho 0 nb 00 0 2 Co C 0 V 00 ho 0 00 2C 005 U or eeC J0 EO nm Sc N USTATE 164 Model Aviation
Edition: Model Aviation - 1986/04
Page Numbers: 72, 73, 162, 163, 164
Free Flight Duration Harry Murphy INSPIRATION day after Christ mas begin column Outside nickel-size snowflakes have falling heavily hour pesky things have already built up fluffy white blanket ground depth two three inches As family out run ning around returning gifts either too large too small sit staring through window workshop nursing miserable head cold wondering ever proved no two snowflakes ever alike Anyhow year-end yuletide sea sonal rush ebbs once again time clean out field box spruce up workshop dust off workbench make ready begin building new model always start New Years day am superstitious per son beginning new year start ing new model has tradition years care ad mit Some years effort might consist pad full computations few lines drawn shelf paper other years might have meant actual construction stab wing half beginning fuselage Over-the-top new year also time ponder lessons learned experi ence mental flinches possible blunders mistakes made Down previous contest season Any design errors remedied before action begins once again ensuing months can probably expect similar results per previous season case last season particular ly frustrating Having spent previous winter stripping old AMA gas-powered workhorses fuel-soaked silkspan tissue coverings replac ing brand another heat-shrink plastic films subsequently spent entire flying season fighting off effects phenomenon call 72Model Aviation C ction Flex high-purformai discussed onths column discusses keep hot Power ship climbing right Older planes didnt have tremendous power higher speeds generated current-day engines Englands Dunham Engineerings contri bution replica diesel market Elfin 249cc its also SAM-eligible OT Ignition engines use booster batteries during starting Harry continued use triedand-proven twin-#6-celi pack L until recentlywhen found price skyrocketing shortage fresh ones stores now uses homemade unit righE inside four alkaline 0-cellsobtainable everywhere discount prices wing flex learned hard way depending design construction wing gas-powered model transition silk silkspan MonoKote Micafilm may out pain plastic films certainly superlatively fuel-resistant compared traditional coverings price may have paid increasing con structed rigidity wingwhich turn adds unwanted weight Admittedly rather lulled myself trap previous efforts using iron-on films amply-braced structures 10%-thick airfoil sections 85 situation different story 85%-thick sections much-lighterweight structures models difficul ty staying power patterns would often go over-the-top wander off cross-country under power model speed increased about midpoint engine runs As result exchange notes super flier Gil Morris past month must have noted huge tear stains stationery explained dilemma return received five-page reply subject following itemized excerpts Gil sez 1 Micafilm like Mylar keeps out wind rain contributes no struc tural strength Silkspan dope still best coverings structural purposes torsional stength 2 model going straight up under power position CG Center Gravity really doesnt matter acting someplace pylon parallel fore-and-aft axis fuselage no consequence down equals up zero-lift condition However what important wing remains zero-lift condition lifting model would loop conversely zero-lift condition forward pitch moment wants twist wing toward washoutthus causing nose drop over the-top effect follows 3 A wing pitching moment ap plied will first diverge twist toward washout twist sizable will resonate flutter frequency determined spring constant wing structure weight distribution wing itself Actually lucky wing flutters because instant ly know may have diverging problem sneaky ones diverge flutter can lead drink Mine didnt flutter Gil What brand booze recommend HM 4 Originally Toothpicks design would occasionally go over-the-top kept beefing up wing until im possible twistand still went over the-top took two years learn stabilizer airfoil too thick would produce same symptoms came thinning stab airfoil case now use either semisymmetrical full-symmetrical stab air foils 5 thing look iswhen engine quits nose momentarily pulls up wing may diverging stab airfoil too thick both 6Correcting stab simple necessary strip covering round bottom ribs bit recover wing may take some ingsuch planking leading edge back main spar both top bottom thereby making section closed box D-shaped section box isnt closed wont much good Rather use planking prefer wide main spar web sides closed-box configuration Diago nal ribs help too 7 I feel time-of-day has something problem well model suspect having wing flex difficulties should find likely go over-the-top cool air morning evening midday because engine putting out horsepower higher volumetric efficiency intakes weight Continued page 162 April 1986 73 Ed Konefes packs turns Lanzo Stick Wright Field contest nonGas fliers sure keep clothes clean Eds Buzzard Bombshell man Meredith Chamberlain checks out fuel shutoff Britishdeslgned Os Max 19powered Crescendo Sturgis Ml contest Plane won its Nostalgia Gas event 1985 SAM Championships Dateline Lawrenceviiie IL 10113185 Gil Morris exclaims Hows chase bike Gil expounds ageold wingflex problem months column Harry Murphy ignites T fuse K&B 3Sccpowered Max-AMliiion 450 epa ration official flight PAFB Dayton OH Ignitor must flameless electric ones showed us December 1985 issue aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248 ~bERSINDEX ADVERTISERSINDEX ADVE lSERStNDEX AMA Membership71 Academy Av Rsearch & Dev36158 Ace Radio Control127 Aerospace Composite Products157 Airtronics2 American Junior Aircraft Co148 Astro Flight34 Balsa USA85 Quay Barber Models150 Bergeron Enterprises152 Blue Ridge Machinery & Tools157 Byron Originals1 CH Electronics34 Cajun RC Products160 CaRa Products10 Carolina-Taffinder134 Johnnie Casburn Mfg51 Cheveron84 Circus Hobbies6-7 Cleveland Model Supply53 Eric Clutton156 Consumers Guide12 Coverite149 Cox Hobbies20 D&D Engineering159 DGA Designs126 Davey Systems Corp130 Davis Diesel Development53 Larry Dodge Aero Inc157 Dougs Hobby Shop142-145 Du-Bro Products Inc17 Dynathrust Props18 Electronic Design Corp80 FAI Model Supply47 FHS Supply Inc4 Fiberglass Master152 Futaba Corp America19 Flyline Models153 Fourmost Products16 Fox Manufacturing Co55 GM Precision Products81 Gas Model Products153 Gator RC Products36 Carl Goldberg Models21 Gorham Model Products5 Great Planes Model Mfg Co83 Gene C Head153 Harry B Higley & Sons146 Historic Aviation39 Hobby Barn120-121 Hobby Hideaway162 Hobby Horn51 Hobby Lobby International135 Hobbypoxy154 Hobby Woods80 Holleys Silent Flight156 Horizon Model Inc147 Howard B Huebl148 Ikon Northwest Co162 Indy RC Sales Inc136-138 J&J Sales160 Jacks Models146 Jomar158 JTec16 K&B Manufacturing Co150 K&S Engineering148 KandWEnt156 Kin Craft146 Knights Air122 Kustom Kraftsmanship8 Lone Star Models45 M&W Models130 MACS Products134 MARC Show49 Master Kit162 McDaniel RC Service36 Jim Messers Quality Model Prod160 Micro Mark124-125 Micro Model Engineering152 Midwest Products12 Model Rectifier CorpCovers 2&3 Mutchlers Hobbies128-1 29 NEPRO150 Neukraft Inc161 Nor-Ray Products Inc47 Okie Free Flight Flyer156 Old Timer Model Aircraft134 159 PK Products84 PAC Model Supply80 Peck-Polymers146 Pelican Enterprises55 Penn Valley Hobby Center148 Pica Products9 Polks Hobby86132-133 Pro-Tune Corp36 Progress Mfg Co139 RJL Industries34 Radio South141 RC Soaring Digest126 Repla-Tech International156 Robbe Modellsport75 Roush Mfg Co55 SR Batteries16 Sachs TG140 Satellite City13 Scale Plans Photo Service157 Science 8637 Shamrock Competition Imports131 Sheldons Hobby Shop20 Sidekick157 SigMfgCo1118 St Croix Models151 Standale Aircraft149 T&D Fiberglass Specialties20 Tatone Products Co18 Tidewater Hobby Enterprises51 Toledo RC Exposition153 Top Flite Models Inc10 Tower Hobbies15 WE Technical Services8 Williams Brothers10 Wilshire Model Center12 Windsor Propeller Co123 Wing Mfg Co53 World Engines155 Cover 4 Zenith Aviation35 Zimpro Marketing84 prices did locate esca lating Out sight 005 Also began notice lot dust already sup posed new batteries indicated turnover store shelves article what once Therefore could now spending good money not-so-fresh batteriesor maybe older batteries ones just discarded Consequently time seek alternatives result search assem bly accompanying photo shows old alongside new 'new~ plastic box containing four D-size alkaline flashlight batteries re tained plastic four-cell holder package wired produce three volts add some additional utility sophistica tion device mounted On-Off switch momentary push-button switch 0-5 volt meter female phono plug takeoff top panel parts found Radio Shack outlet store along commercial lead-out wire incorporates molded-on male phono plug end coiled twowire lead has medium-size alligator clips opposite end its six-foot length shelf-life alkaline batteries tremendous D-size alkaline batteries constantly sale discount depart ment stores permitting least dozen rtifl ~Jrih NV purchased price two old No 6 variety suspect effec tiveness booster system should encounter cranky-starting engine NEERS rur QUfRTER SCALE PLAJE IN QUFRTEk SCALE CA l1986 163 9 l-fIN& RULE j 7gv Playmate$650 RC Sport flier 3 RC channels 1 5- 25 engines spans 50 Hummin bird$750 FF Hot Class NB Gas competition plane won 85 Nats B-25B$400 CL Profile scale WW II bomber twin /2A engines spans 30A Na 193Silent CL Stoat mndel McDonald winner 187619801982 FAI World Champ$ 375 Na 239Sloe Birds RC Ken Willards fnrrnation plane 4-channel 10-pnwer$ 375 No 262Cranlimanter CL Crash-proof trainer two aizea1 5-30- 3540-power$ 125 No 302fisI F-iS AC Sarpelna 049 docted fan sport tiler far 2-channel Balna wiega tail lane stractare$ 275 No 3101930 Float Bipism RC Sport Scale far 35-40 4-channel Wingspan 56 scale Twa sheets$ 625 No 314Drake 8 AC Ken Willards flying boat 3-channel 1 5-powor Fly land removable gear$ 375 No 325TaylorCuic AC Ons SmIls Schoolyard-Scale 049a 2-3 channel Spans 50 in$ 350 No 332Zephye AC Small 2-chanoel glider hand-launch tow thermal slope soaring$ 200 No 355Laser 200 AC Sport Scale replica championship Anrohatic flier Uses 40 power 4-5 chaonel Two sheets$1075 No398Boo Bee 01 AC l-fatfkes latest y-scale spans 75 weighs 15 lb 90 larger Foarshents 00 doe$2225 No 414ElectrIc Sparky AC electric-powered ton flier 05 motor 3-chanoel AC scaled api 939 rubher-powerlanorite$ 950 No422Scooter AC Two-Meter Sailplane has won Nats event 19821983 plan othorcontests$ 550 No 430Irooshlo AC Zippy little aportuter 1 01 S power 3-channel AC$ 400 No 433Wotta Up AC Electdc-powered glider 2-3 channels 035 motor spans 5210$ 450 Na 430Crrdur FF Embryo Endurance rubber-power fun ship has hig-model characteristics 0 Ns 440Cavalec AC Old-Timer-f ihe new design has huge wing slow easy flights 35 power 3 channelsTwo shents $1 725 Ne 444Fleoholt AC posher canard sport/pattem oses 40 pooher engine 4-channel Has swept-forward loomwings 50 Na 447hA flea Amitca AC Old-Timer %A Texaco model 049 glow 2-channels$ 650 Na 452Boo Bee 2 AC Quarter-scale spans 71 io uses 90 power Foor sheets $1 600 No 453Smootlile ProSe CL Prohle rendition Bob Palmers soper-Stunter early Fifties 35 power$ 550 No 454Swoot P30 FF Neal stick-and-tissue Qaldoor Aubber P-3D-class medel contest-winner$ 200 No 457Spectra AC Electric-power 05-size motor uses 3 different wings sport soaring aerobatics$ 700 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels$ 650 No 451Trleter Bematermoc CL Famous unflapped StonIer late Forties Uses 35 engine$ 650 No 452Poodle Pt FF Jumbo Aohher Scale WW Italian observation plane$ 400 Ne 453Plotyhohalothon Vt AC hA Pylon racer uses lots file ply built-up structure strength lightoess$ 475 No 465Sloe Meet AC Fan-Ily sportster 40-size nogloes spans 52 io Lightweight structure$ 700 No 457AIce Spwt FF Aohher Scale design won 83 Nats designer Don Srull Wingspan 26 in$ 250 No 458SmooIhor CL Stonter 29135 power Design hased hyhrfd Smoothie/Nobler$ 675 No 470Strokoc AC Mid-wing spertater noon 40145 four-stroke engine spans 50% tail-dragger 50 No 474Pacer 15 FF Nordic A-i Towline Glider won 1963 World Champs$ 500 No 475Seoptipslcek CL Slow Combet med uses geodetic wing construction 36 engine Two-sheet plan has allparts patterns$ 400 No 477Meodoeto CL Sport Stonter uses sport 15 engine spans 35 in$ 325 No 470Battercap AC Cute elfin sportater uses micro 2-ch AC pulse-rudder Spans 27 020-035 power$ 300 Na 470FoorStreke 0oestar AC SportfAorobahcs ship has 920s styling uses 90 4-stroke engine spans 85 in2 sheets $1100 Na 480Oldlcaleos CL Fabeboas competition Stenter has 550 ml wing area flino TO 0401051 spans 47% in$ 600 Na 481Europa AC Sailplane tor PAl competition has liherglass fuselage loom wings wing flaps stabilator tail Spans 110 $ 700 Ne 4626oldoaAger AC SportlAerohahc medel looks like Golden Age sportater 60 engines spans 62 in$ 750 No403CBS Hawk UttnigIit FF Ouldoor Gas Scale plane uses CO-2 pnwer spans 29 in$ 300 No454AeroecO K AC Quarter-Scale 30s lightplune spans 9 ft uses 12 ca 2-cyl 4-strokn engine woighs II V lb Three sheets$1975 No 486M8eaAtwood Spoctat AC Sport-Scale Golden Age air-racer uses 21 engine spans 45 in$ 925 Ne 467Cap 21 AC Scale Aerobutic plane 40-size engine spans 62 Two sheets$1000 No 406MS-7 FP Jumbo Aubber Scale 011920-era Thamas Morse Scoot biplane spans 37 in$ 500 Ne 490Wookeedor AC Low-wing sport flier br 20-size 4-stroke engine spans 47% in$ 575 Ne 492CIrcelotor PP A-i Towline Glider spans 51 uses lihergluss tail boom circln-fuw ranchanism$ 250 No 493Sopor Draao AC Shoolder-wing sport tIler spans 66 uses 45-60 engine Two sheets$1 275 No 494NABOOB CL Very lightweight sportfStooter lImo unwind power alone 049-l 5 power Spun 39 in$ 400 No495FW-100 AC Hand-launched all-halo scalelike sportsterfor10-i5 negines two AC channels Spans3910$ 425 No 496P47 Thandeebott AC Other half Dngfight Dun has similar characteristics FW-1 90$ 425 No 497Manhattan PIeces FF Indoor robber cabin model ideal f beginners Spans 20% in$ 200 No 498Mhlwest Span Racor CL Simple ragged profile racer far 35 engine spans 36 in$ 350 No 4994-60 AC Doe Mathews great sport flier 60-size four-stroker engine spans 7010 Two sheets$1 275 No 500Piker BVt AC Sport scale model WW monoplane uses 90 br-stroke engine spans 93% Two sheets$1690 No 501EIodeckor CL Sport ocale medel early WW monoplane far %A puwer spans 23/ in$ 290 Ne 502BIll Wisters Vagahoad FP Sport tiler down-sized 02-puwered version nfl 940s cubin plane Spans 33% in$ 225 No 503Banchat AC Slopn-soorer spuas 6010 uses 2 AC channels$ 750 No 504Tarko Lance B PF Aubber-powerod scale model spans 19% in$ 150 No 505P38 Llghtideg CL Sport Scale fighter spans 65% weighs 10 lb uses twin 35s Two shnnts$1175 Circle numbers plans 193239 332386 438440 457460 468470 480481 488490 497498 504505 wish order 262 398 444 461 474 482 492 499 506 302 414 447 462 475 483 493 500 507 310 422 452 463 477 484 494 501 508 314326 430433 453454 465467 478479 486487 495496 502503 Plan price isciades firat class postage US delivery Ia Air Mali aver 300 milos orders outside US please add $2bU Air Mali 12b SuriaCe mall eaon pfan Make check monny order payable US funds Model Aviation c/s AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $____________________________________ NAME STREET CITY ZIP Simply press momentary switch button check resultant voltage output four cells contained within box club decal strategically placed adds nice cosmetic touch device well total assembly much lighter weight much convenient old booster systemand important hasnt failed yet Try Youll like too Newsletter month As stated last column intend spare little space occasions recognize missile grass roots media Free Flight newsletteras well unsung editors spite wind rain fear plagiarism keep lines communication open little nooks crannies Free Flight activity months hats off goes rather new publication SEKS Talks voice Smyrna Georgiabased South Eastern Kamikaze Squadron current prexy Bob Baker publication quarterly ably edited traveling sales representative Jim Walston parent club literally Old-Timer oriented represents Chapter 47 SAM Society Antique Modelers complete oriental letter-type SEKs symbols decals T-shirts quality publication chock full photos modeling hints area Free Flight activities abundance Georgia humor thrown words Editor Walston can become SEKs sup porter $275 per year ad dress SEKS Talks 725 Cooper Lake Road SE Smyrna GA 30080 Just fur piece down lane Gawg Perrymans place Ill bet Equal time 0-0-0-H smarts photo caption January issue page 62 Associate Editor Ross McMullen singled out writer stooge exercise subtle safe ty pitches really pricked pride couldnt get copy machine fast enough make copy photo question scribbled few nasties fire missile off ye olde editor next mail truck leaving East Coast As relayed Ross Im holding model over head arms length Im wearing safety glasses What would want Well anyway cant too careful however certain amount danger attached machine cer tainly mechanisms associated hobby demand respect again sure way play safe take up violin piano instead ya downwind . l work anymore RMcM Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 No 506 No 507 No 508 hi 0 Cd 8 0 c 0 -0 00 Zn Os oh0 0 oh coo C -- ho 0 nb 00 0 2 Co C 0 V 00 ho 0 00 2C 005 U or eeC J0 EO nm Sc N USTATE 164 Model Aviation
Edition: Model Aviation - 1986/04
Page Numbers: 72, 73, 162, 163, 164
Free Flight Duration Harry Murphy INSPIRATION day after Christ mas begin column Outside nickel-size snowflakes have falling heavily hour pesky things have already built up fluffy white blanket ground depth two three inches As family out run ning around returning gifts either too large too small sit staring through window workshop nursing miserable head cold wondering ever proved no two snowflakes ever alike Anyhow year-end yuletide sea sonal rush ebbs once again time clean out field box spruce up workshop dust off workbench make ready begin building new model always start New Years day am superstitious per son beginning new year start ing new model has tradition years care ad mit Some years effort might consist pad full computations few lines drawn shelf paper other years might have meant actual construction stab wing half beginning fuselage Over-the-top new year also time ponder lessons learned experi ence mental flinches possible blunders mistakes made Down previous contest season Any design errors remedied before action begins once again ensuing months can probably expect similar results per previous season case last season particular ly frustrating Having spent previous winter stripping old AMA gas-powered workhorses fuel-soaked silkspan tissue coverings replac ing brand another heat-shrink plastic films subsequently spent entire flying season fighting off effects phenomenon call 72Model Aviation C ction Flex high-purformai discussed onths column discusses keep hot Power ship climbing right Older planes didnt have tremendous power higher speeds generated current-day engines Englands Dunham Engineerings contri bution replica diesel market Elfin 249cc its also SAM-eligible OT Ignition engines use booster batteries during starting Harry continued use triedand-proven twin-#6-celi pack L until recentlywhen found price skyrocketing shortage fresh ones stores now uses homemade unit righE inside four alkaline 0-cellsobtainable everywhere discount prices wing flex learned hard way depending design construction wing gas-powered model transition silk silkspan MonoKote Micafilm may out pain plastic films certainly superlatively fuel-resistant compared traditional coverings price may have paid increasing con structed rigidity wingwhich turn adds unwanted weight Admittedly rather lulled myself trap previous efforts using iron-on films amply-braced structures 10%-thick airfoil sections 85 situation different story 85%-thick sections much-lighterweight structures models difficul ty staying power patterns would often go over-the-top wander off cross-country under power model speed increased about midpoint engine runs As result exchange notes super flier Gil Morris past month must have noted huge tear stains stationery explained dilemma return received five-page reply subject following itemized excerpts Gil sez 1 Micafilm like Mylar keeps out wind rain contributes no struc tural strength Silkspan dope still best coverings structural purposes torsional stength 2 model going straight up under power position CG Center Gravity really doesnt matter acting someplace pylon parallel fore-and-aft axis fuselage no consequence down equals up zero-lift condition However what important wing remains zero-lift condition lifting model would loop conversely zero-lift condition forward pitch moment wants twist wing toward washoutthus causing nose drop over the-top effect follows 3 A wing pitching moment ap plied will first diverge twist toward washout twist sizable will resonate flutter frequency determined spring constant wing structure weight distribution wing itself Actually lucky wing flutters because instant ly know may have diverging problem sneaky ones diverge flutter can lead drink Mine didnt flutter Gil What brand booze recommend HM 4 Originally Toothpicks design would occasionally go over-the-top kept beefing up wing until im possible twistand still went over the-top took two years learn stabilizer airfoil too thick would produce same symptoms came thinning stab airfoil case now use either semisymmetrical full-symmetrical stab air foils 5 thing look iswhen engine quits nose momentarily pulls up wing may diverging stab airfoil too thick both 6Correcting stab simple necessary strip covering round bottom ribs bit recover wing may take some ingsuch planking leading edge back main spar both top bottom thereby making section closed box D-shaped section box isnt closed wont much good Rather use planking prefer wide main spar web sides closed-box configuration Diago nal ribs help too 7 I feel time-of-day has something problem well model suspect having wing flex difficulties should find likely go over-the-top cool air morning evening midday because engine putting out horsepower higher volumetric efficiency intakes weight Continued page 162 April 1986 73 Ed Konefes packs turns Lanzo Stick Wright Field contest nonGas fliers sure keep clothes clean Eds Buzzard Bombshell man Meredith Chamberlain checks out fuel shutoff Britishdeslgned Os Max 19powered Crescendo Sturgis Ml contest Plane won its Nostalgia Gas event 1985 SAM Championships Dateline Lawrenceviiie IL 10113185 Gil Morris exclaims Hows chase bike Gil expounds ageold wingflex problem months column Harry Murphy ignites T fuse K&B 3Sccpowered Max-AMliiion 450 epa ration official flight PAFB Dayton OH Ignitor must flameless electric ones showed us December 1985 issue aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE ly September sure attend Lets keep CL Scale alive well Hint workshopRonald L Cahn MD writes Wing T1os newslet ter Mid-Hudson Modelmasters like get something nothing especially true something becomes useful valu able aid nothing would other wise irrelevant junk suggestion use plastic cover caps come shaving cream hairspray cans other similar items perfect mixing holding polyester resin and/or micro-balloons mixtures Once cured residual material left cup can removed easily simply bending deforming sides causing hardened brittle resin microballoons mixture crack fall out cleanly leaving cover ready reuse Doctor Caha goes say caps come variety sizes suit dif ferent jobs has used molds cast piece solid microballoons later carving specific shape small plastic film cans such Kodak film suit same purpose can used small jobs word caution plastic caps can used stated purpose possible come across cap suited mixing resins microballoons mixtures Before using cap large batch resin etc test small amount intended mixture sure compatible mixture Send photos building tips contest reports other items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 FF Duration/Murphy Continued page 73 air fuel stroke because air dense Gill offers few additional opinions effect new high-powered engines placed models orig inally designed less-powerful engines have caused similar problems particularly AMA gas categories FAI fliers real ly havent felt problem too much because have weight spare everything gets planked anyway Also feels really hot ships easier fly sport stuff once get technical problems ironed out because hot stuff seems ignore gravity bores hole whatever direction throw Finally Gil makes astute observation future should expect greater ad vancements AMA gas categories compared FAI AMA categories unlimited free design restric tions Watch ItI alternate-month FF Dura tion co-author Bob Meuser sent an guished note proclaimed abject sorrow having allowed bit erroneous information creep March column mentioned page 147 some copies old NFFS Sympo Report available should have 1971 edition 1981 Shall let him off hook favor say Aye Elfin Edge Society Antique Modelers SAM requires gas-powered competition models meet minimum weight requirement eight ounces per square foot wing area would nor mally include ignition engine model itself necessary ignition ac cessories coil condenser batteries wir ing etc Since ignition paraphernalia runs about constant five ounces no matter model small Class large Class B C generally much easier build Class B C model weight minimums keep Class model being overweight because ignition-accessory-to-totalweight ratio much less larger models instance Playboy Senior 800 square inches must weigh minimum 444 ounces regardless ignition powerplant utilized five-ounce igni tion system about / total weight However 280-to-360-squareinch Class models minimum HO8BYKIDAWAYHOEBYKIOEAWAYHOB8YHDEAWAYHOBBYHIDEAwAy FAMOUS BRITISH DIESELS AEROMODELLER SPARES FC M/E PAW D/C 3rd PRINTING PLANS LOG-DIESEL HANDBOOK pp 5 HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 5 HOBBYHIDEAWAYHOBBYHIDEAWAYHOB8YHIDEAWAYI-IO9RYHIDEAW weight ranges within 155 20 ounces respectively effect five-ounce ig nition system like third quarter models total weight Obviously method insure Class model does tip scales excess use diesel engine forego added weight five-ounce igni tion system Diesels offer other advan tages well run constant speed experience unpredictable ills associated ignition systems thereby offering consistent flights major disadvantage diesels SAM usage date has eligible too difficult findthat until now Dunham Engineering England recent ly began offering reproduction fine Elfin 249cc diesel original Elfins quite popular late ties Dunhams current replica effort has deemed Old-Timer-eligible SAMs engine-approval committee Bruce Augustus won Class Pylon event 85 SAM Champs using Elfin 249cc Playboy Junior attest engines contest capability Should having overweight difficulties Class Old-Timer models might interested diesel alternative US Elfin distributor Dunham Strieglers R/C Supply 5831 McKnight Houston TX 77035 713-729-5652 list $75 plus $4 postage handling Three-volt booster batteries indi vidual approaches some things hobby never seem change ofttimes traditional ritual nature though effective alternatives may available typical example annual practice replacing two 1 A-volt No 6 dry cells wired series serve 3-volt booster battery system starting ignition engines years procedure spring deposit old batteries family trash can regardless condi tion promptly check out local hardware stores fresh replacements recent years replacements creasingly difficult findplus 162 Model Aviation DIVISION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 DeHAVILLAND BEAVER GIANT SCALE 96 4 CYCLE 90-120 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKONNWST 566 Auburn WA 98071 ox 206 941-8248 ~bERSINDEX ADVERTISERSINDEX ADVE lSERStNDEX AMA Membership71 Academy Av Rsearch & Dev36158 Ace Radio Control127 Aerospace Composite Products157 Airtronics2 American Junior Aircraft Co148 Astro Flight34 Balsa USA85 Quay Barber Models150 Bergeron Enterprises152 Blue Ridge Machinery & Tools157 Byron Originals1 CH Electronics34 Cajun RC Products160 CaRa Products10 Carolina-Taffinder134 Johnnie Casburn Mfg51 Cheveron84 Circus Hobbies6-7 Cleveland Model Supply53 Eric Clutton156 Consumers Guide12 Coverite149 Cox Hobbies20 D&D Engineering159 DGA Designs126 Davey Systems Corp130 Davis Diesel Development53 Larry Dodge Aero Inc157 Dougs Hobby Shop142-145 Du-Bro Products Inc17 Dynathrust Props18 Electronic Design Corp80 FAI Model Supply47 FHS Supply Inc4 Fiberglass Master152 Futaba Corp America19 Flyline Models153 Fourmost Products16 Fox Manufacturing Co55 GM Precision Products81 Gas Model Products153 Gator RC Products36 Carl Goldberg Models21 Gorham Model Products5 Great Planes Model Mfg Co83 Gene C Head153 Harry B Higley & Sons146 Historic Aviation39 Hobby Barn120-121 Hobby Hideaway162 Hobby Horn51 Hobby Lobby International135 Hobbypoxy154 Hobby Woods80 Holleys Silent Flight156 Horizon Model Inc147 Howard B Huebl148 Ikon Northwest Co162 Indy RC Sales Inc136-138 J&J Sales160 Jacks Models146 Jomar158 JTec16 K&B Manufacturing Co150 K&S Engineering148 KandWEnt156 Kin Craft146 Knights Air122 Kustom Kraftsmanship8 Lone Star Models45 M&W Models130 MACS Products134 MARC Show49 Master Kit162 McDaniel RC Service36 Jim Messers Quality Model Prod160 Micro Mark124-125 Micro Model Engineering152 Midwest Products12 Model Rectifier CorpCovers 2&3 Mutchlers Hobbies128-1 29 NEPRO150 Neukraft Inc161 Nor-Ray Products Inc47 Okie Free Flight Flyer156 Old Timer Model Aircraft134 159 PK Products84 PAC Model Supply80 Peck-Polymers146 Pelican Enterprises55 Penn Valley Hobby Center148 Pica Products9 Polks Hobby86132-133 Pro-Tune Corp36 Progress Mfg Co139 RJL Industries34 Radio South141 RC Soaring Digest126 Repla-Tech International156 Robbe Modellsport75 Roush Mfg Co55 SR Batteries16 Sachs TG140 Satellite City13 Scale Plans Photo Service157 Science 8637 Shamrock Competition Imports131 Sheldons Hobby Shop20 Sidekick157 SigMfgCo1118 St Croix Models151 Standale Aircraft149 T&D Fiberglass Specialties20 Tatone Products Co18 Tidewater Hobby Enterprises51 Toledo RC Exposition153 Top Flite Models Inc10 Tower Hobbies15 WE Technical Services8 Williams Brothers10 Wilshire Model Center12 Windsor Propeller Co123 Wing Mfg Co53 World Engines155 Cover 4 Zenith Aviation35 Zimpro Marketing84 prices did locate esca lating Out sight 005 Also began notice lot dust already sup posed new batteries indicated turnover store shelves article what once Therefore could now spending good money not-so-fresh batteriesor maybe older batteries ones just discarded Consequently time seek alternatives result search assem bly accompanying photo shows old alongside new 'new~ plastic box containing four D-size alkaline flashlight batteries re tained plastic four-cell holder package wired produce three volts add some additional utility sophistica tion device mounted On-Off switch momentary push-button switch 0-5 volt meter female phono plug takeoff top panel parts found Radio Shack outlet store along commercial lead-out wire incorporates molded-on male phono plug end coiled twowire lead has medium-size alligator clips opposite end its six-foot length shelf-life alkaline batteries tremendous D-size alkaline batteries constantly sale discount depart ment stores permitting least dozen rtifl ~Jrih NV purchased price two old No 6 variety suspect effec tiveness booster system should encounter cranky-starting engine NEERS rur QUfRTER SCALE PLAJE IN QUFRTEk SCALE CA l1986 163 9 l-fIN& RULE j 7gv Playmate$650 RC Sport flier 3 RC channels 1 5- 25 engines spans 50 Hummin bird$750 FF Hot Class NB Gas competition plane won 85 Nats B-25B$400 CL Profile scale WW II bomber twin /2A engines spans 30A Na 193Silent CL Stoat mndel McDonald winner 187619801982 FAI World Champ$ 375 Na 239Sloe Birds RC Ken Willards fnrrnation plane 4-channel 10-pnwer$ 375 No 262Cranlimanter CL Crash-proof trainer two aizea1 5-30- 3540-power$ 125 No 302fisI F-iS AC Sarpelna 049 docted fan sport tiler far 2-channel Balna wiega tail lane stractare$ 275 No 3101930 Float Bipism RC Sport Scale far 35-40 4-channel Wingspan 56 scale Twa sheets$ 625 No 314Drake 8 AC Ken Willards flying boat 3-channel 1 5-powor Fly land removable gear$ 375 No 325TaylorCuic AC Ons SmIls Schoolyard-Scale 049a 2-3 channel Spans 50 in$ 350 No 332Zephye AC Small 2-chanoel glider hand-launch tow thermal slope soaring$ 200 No 355Laser 200 AC Sport Scale replica championship Anrohatic flier Uses 40 power 4-5 chaonel Two sheets$1075 No398Boo Bee 01 AC l-fatfkes latest y-scale spans 75 weighs 15 lb 90 larger Foarshents 00 doe$2225 No 414ElectrIc Sparky AC electric-powered ton flier 05 motor 3-chanoel AC scaled api 939 rubher-powerlanorite$ 950 No422Scooter AC Two-Meter Sailplane has won Nats event 19821983 plan othorcontests$ 550 No 430Irooshlo AC Zippy little aportuter 1 01 S power 3-channel AC$ 400 No 433Wotta Up AC Electdc-powered glider 2-3 channels 035 motor spans 5210$ 450 Na 430Crrdur FF Embryo Endurance rubber-power fun ship has hig-model characteristics 0 Ns 440Cavalec AC Old-Timer-f ihe new design has huge wing slow easy flights 35 power 3 channelsTwo shents $1 725 Ne 444Fleoholt AC posher canard sport/pattem oses 40 pooher engine 4-channel Has swept-forward loomwings 50 Na 447hA flea Amitca AC Old-Timer %A Texaco model 049 glow 2-channels$ 650 Na 452Boo Bee 2 AC Quarter-scale spans 71 io uses 90 power Foor sheets $1 600 No 453Smootlile ProSe CL Prohle rendition Bob Palmers soper-Stunter early Fifties 35 power$ 550 No 454Swoot P30 FF Neal stick-and-tissue Qaldoor Aubber P-3D-class medel contest-winner$ 200 No 457Spectra AC Electric-power 05-size motor uses 3 different wings sport soaring aerobatics$ 700 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size engine 4 channels$ 650 No 451Trleter Bematermoc CL Famous unflapped StonIer late Forties Uses 35 engine$ 650 No 452Poodle Pt FF Jumbo Aohher Scale WW Italian observation plane$ 400 Ne 453Plotyhohalothon Vt AC hA Pylon racer uses lots file ply built-up structure strength lightoess$ 475 No 465Sloe Meet AC Fan-Ily sportster 40-size nogloes spans 52 io Lightweight structure$ 700 No 457AIce Spwt FF Aohher Scale design won 83 Nats designer Don Srull Wingspan 26 in$ 250 No 458SmooIhor CL Stonter 29135 power Design hased hyhrfd Smoothie/Nobler$ 675 No 470Strokoc AC Mid-wing spertater noon 40145 four-stroke engine spans 50% tail-dragger 50 No 474Pacer 15 FF Nordic A-i Towline Glider won 1963 World Champs$ 500 No 475Seoptipslcek CL Slow Combet med uses geodetic wing construction 36 engine Two-sheet plan has allparts patterns$ 400 No 477Meodoeto CL Sport Stonter uses sport 15 engine spans 35 in$ 325 No 470Battercap AC Cute elfin sportater uses micro 2-ch AC pulse-rudder Spans 27 020-035 power$ 300 Na 470FoorStreke 0oestar AC SportfAorobahcs ship has 920s styling uses 90 4-stroke engine spans 85 in2 sheets $1100 Na 480Oldlcaleos CL Fabeboas competition Stenter has 550 ml wing area flino TO 0401051 spans 47% in$ 600 Na 481Europa AC Sailplane tor PAl competition has liherglass fuselage loom wings wing flaps stabilator tail Spans 110 $ 700 Ne 4626oldoaAger AC SportlAerohahc medel looks like Golden Age sportater 60 engines spans 62 in$ 750 No403CBS Hawk UttnigIit FF Ouldoor Gas Scale plane uses CO-2 pnwer spans 29 in$ 300 No454AeroecO K AC Quarter-Scale 30s lightplune spans 9 ft uses 12 ca 2-cyl 4-strokn engine woighs II V lb Three sheets$1975 No 486M8eaAtwood Spoctat AC Sport-Scale Golden Age air-racer uses 21 engine spans 45 in$ 925 Ne 467Cap 21 AC Scale Aerobutic plane 40-size engine spans 62 Two sheets$1000 No 406MS-7 FP Jumbo Aubber Scale 011920-era Thamas Morse Scoot biplane spans 37 in$ 500 Ne 490Wookeedor AC Low-wing sport flier br 20-size 4-stroke engine spans 47% in$ 575 Ne 492CIrcelotor PP A-i Towline Glider spans 51 uses lihergluss tail boom circln-fuw ranchanism$ 250 No 493Sopor Draao AC Shoolder-wing sport tIler spans 66 uses 45-60 engine Two sheets$1 275 No 494NABOOB CL Very lightweight sportfStooter lImo unwind power alone 049-l 5 power Spun 39 in$ 400 No495FW-100 AC Hand-launched all-halo scalelike sportsterfor10-i5 negines two AC channels Spans3910$ 425 No 496P47 Thandeebott AC Other half Dngfight Dun has similar characteristics FW-1 90$ 425 No 497Manhattan PIeces FF Indoor robber cabin model ideal f beginners Spans 20% in$ 200 No 498Mhlwest Span Racor CL Simple ragged profile racer far 35 engine spans 36 in$ 350 No 4994-60 AC Doe Mathews great sport flier 60-size four-stroker engine spans 7010 Two sheets$1 275 No 500Piker BVt AC Sport scale model WW monoplane uses 90 br-stroke engine spans 93% Two sheets$1690 No 501EIodeckor CL Sport ocale medel early WW monoplane far %A puwer spans 23/ in$ 290 Ne 502BIll Wisters Vagahoad FP Sport tiler down-sized 02-puwered version nfl 940s cubin plane Spans 33% in$ 225 No 503Banchat AC Slopn-soorer spuas 6010 uses 2 AC channels$ 750 No 504Tarko Lance B PF Aubber-powerod scale model spans 19% in$ 150 No 505P38 Llghtideg CL Sport Scale fighter spans 65% weighs 10 lb uses twin 35s Two shnnts$1175 Circle numbers plans 193239 332386 438440 457460 468470 480481 488490 497498 504505 wish order 262 398 444 461 474 482 492 499 506 302 414 447 462 475 483 493 500 507 310 422 452 463 477 484 494 501 508 314326 430433 453454 465467 478479 486487 495496 502503 Plan price isciades firat class postage US delivery Ia Air Mali aver 300 milos orders outside US please add $2bU Air Mali 12b SuriaCe mall eaon pfan Make check monny order payable US funds Model Aviation c/s AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $____________________________________ NAME STREET CITY ZIP Simply press momentary switch button check resultant voltage output four cells contained within box club decal strategically placed adds nice cosmetic touch device well total assembly much lighter weight much convenient old booster systemand important hasnt failed yet Try Youll like too Newsletter month As stated last column intend spare little space occasions recognize missile grass roots media Free Flight newsletteras well unsung editors spite wind rain fear plagiarism keep lines communication open little nooks crannies Free Flight activity months hats off goes rather new publication SEKS Talks voice Smyrna Georgiabased South Eastern Kamikaze Squadron current prexy Bob Baker publication quarterly ably edited traveling sales representative Jim Walston parent club literally Old-Timer oriented represents Chapter 47 SAM Society Antique Modelers complete oriental letter-type SEKs symbols decals T-shirts quality publication chock full photos modeling hints area Free Flight activities abundance Georgia humor thrown words Editor Walston can become SEKs sup porter $275 per year ad dress SEKS Talks 725 Cooper Lake Road SE Smyrna GA 30080 Just fur piece down lane Gawg Perrymans place Ill bet Equal time 0-0-0-H smarts photo caption January issue page 62 Associate Editor Ross McMullen singled out writer stooge exercise subtle safe ty pitches really pricked pride couldnt get copy machine fast enough make copy photo question scribbled few nasties fire missile off ye olde editor next mail truck leaving East Coast As relayed Ross Im holding model over head arms length Im wearing safety glasses What would want Well anyway cant too careful however certain amount danger attached machine cer tainly mechanisms associated hobby demand respect again sure way play safe take up violin piano instead ya downwind . l work anymore RMcM Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 No 506 No 507 No 508 hi 0 Cd 8 0 c 0 -0 00 Zn Os oh0 0 oh coo C -- ho 0 nb 00 0 2 Co C 0 V 00 ho 0 00 2C 005 U or eeC J0 EO nm Sc N USTATE 164 Model Aviation