Soaring Dan Pruss ALMOST F3B Soaring enthusiasts classification F3B strikes terror heartsand thumbs has fliers quickly reminisce about last wing saw fold tow F3 B heading column reader suddenly becomes interested Helicop ters please read First off let say F3B isnt European concept sailplane flying competition LSF back 1971 proposed three-task con cept Duration Distance Speed proposal accepted ideas have part AMA rule book since Italian aero club took concept modified rules proposed FAT thats today Though easy contest manage straight duration event F3B tasks generate interest grab new followers events can just find way scheduled couple ideas have generated few interested folks just might allow club get taste F3B competition having trying outdesign last world champs slippery wonder ideas suggested mainly along lines generating interest F3B-type events among fliers using older types Sailplanesthe kind models fellows accustomed flyingrather running contest strictly enforces FAT rules Skip Miller twice USA team member 1977 World Champ came up idea club idea basically Place 13 second cap speed anything flys speed run 13 seconds less gets thousand Stan Watsons new F3B model has kinds desirable features quick-to-build low cost 2channel Sagitta-inspired sliding hatch quick access radio Bird has Hi Johnson foam wing cores covered sheet balsa Eppler 193 airfoil plywood-sided fuselage foam-filled rearfor rigidity strength Fuselage painted EconoKote covers wings tail Forward servo operates flying stab rear servo operates ailerons rudder same output arm Photo Dan Pruss 46 Model Aviation Control Jim Ealys Zogling 38 /4-scale nas 1 uu sq wing area Jims company IArcnaeopseryx offers plans 3-views 19 countries Photo J Ealy Jim Ealy Ill prepares launch 1/5-scale Granau Babyit highest static points Scale Glider 80 Nats Available Archaeopteryx see article Ealy photo points Flights slower 13 seconds would receive reduced scores oPSO points per second down 17 seconds 800 points Anything greater 17 seconds would worth 700 points Any attempt Speed would get no less 700 points Remember contest idea getting new blood figura tively speaking course F3B Any flight crossed center line safety line would also get 700 points rather customary zero course idea will require support flier Screamin Eagle can turn 95 Speed support will help new kid block entered Oly II As Duration task no changes required As matter fact kid Oly II could find himself beat Back team selection finals last year group us talked about ways get newcomer interested F3B Speed decided major drawbackbut because aver age Duration flier thinks doesnt have anything competitive us felt series contests could scheduled whereby Speed task would have cap say 17 seconds first contest Following contests series could have speed cap diminished second per contest would easy way new F3B competitors ease type flying Since method competition involves series contests would take groups have long summer schedule such East Coast Soaring League Great Lakes Soaring League Northwest Soaring Society SC2 run effective series last final suggestion run good old straight Duration/landing contests end contest day allow fliers interested fly F3B Speed task order make runs meaningful get flying allow flier get three runs succession could average three take best three whatever suits three-flight rounds could flown depending time number fliers Scoring Speed would separate counted Duration awards advantage suggestion would interested fliers have compete bystanders would exposed task ranks know always get few want meet new challenge Snow Fli Detroits annual winter bash took place February 15and ask annual eleventh row Anybody Out longer streak club sponsored events Drop line think yearly thermal underwear special local event 57 fliers will argue other wise Warren Tiahrt CDed event said summer contests should good Seventeen entered Unlimited young Eric Tiahrt outscored 1208 out possible 1395 Bob Scott 1024 best out of37 Standard class fliers Chris Corven won Jr-Sr 736 Two Meter entries could fly Standard Unlimited good ol CD waxed em 914 Continued page 122 MODELMAN IA T111 TOT F TTF 110FF 1111001 ITO IFI IrFI TI FIP TFOlI.P9FE1IT FOLFIF905 990 01 TO IF P FLOT 01 19206 990 111 TIFITI PP 11191 II F - 0 iF500200 FOIl TIIITI 1 101-IT lIEIO9TT55250 FE IF 1 1 lIE FH lIFE FOL PP 11101 FR 0S 1 50 501999 901 50 992299 FF121 FIll 119114Ff 40954199 FF121 F 11 TPOIF5P955199 F 111 00FF 1-91 41954299 LINT952199 FIT FE IFIMENT952999 FE 1-P II 110FF P F952099 FEIFIEF OE1IOPTEF 100 9 5 092 1999517500 Fl TOEs 0 00 EPI IF HEN952199 FIITOEFI El 0 F 019 F\ 99 l1H SEEP 99950999 POPlIN IF F4F 41 H F 9111 72111-12 SPEF 9954099 FIITOEN lIP 4F 4 II 00l1O NIFAFI BOFT 1951299 I1OL2EEFI P91 FF111 111-Il952799 401411 Elf 14 0 OP 9 ELNEE 00 455200 1111111ET 1 9 P911 94 2 0 9961- 49952299 FIIILEF 511 FFI1lPPEEP 010011 01955299 PEPPY OPO IOFIFE PIT 59514990 FF11 FI-IPE 11101 FITS 49512990 FEEP FNP0 1111111 PIT 14511 990 TEPLIOF LIFEP P192119 TEE9S1599 TO ELITE 1111 P1-F NOPLEF952999 111 OTFIL 1- SF1 2 SONLIPAF TUlIP SAL P111-0201909911900 011 III' PLO 0 102EP 9T 0 FIFE L ITT 1150 POET OLIMEEP 91111 911 LIFFIEf 9111 101111104 TO F1F101L1191119 FF1 OFI 1 -01191 P901- 9 4 FILL PElLET EFT TI Fl-lANGEFIPPEE 01011 T1L 15TH SE POET ITFIFITH 112000 FLIEPENT IIEPLIEP 900 EIII-IILIOTE2 101 OFEFINI 11T FEEl 111TH 002000 OP SINE RE 9111 01 99 OPEl 11119011 WITH 09109 EPEE 0 IEEEGIET 111TH OLL OPEEP EPEE FIPIIEFI NO IlIPO0F102IFIlI SF111' 1-111 102 911 FOlIOS 111111110 9IA9 EIISCOLINT 11111 NET 10111 110 119 TEE 1 9 9CFEPTEE OLIT lOLl ElLIOT OrE SI 19FF TO TOTOLINTL 101 FOIl * 9911 EFPIE9TION FATE01EPINFo 1-1011011110 19 00 TFI 10 00 92100 191 TI 9199105001 TO 4090 921 409 411011 9001Ff4 001TO SF10 900 5 IIIIEE '1 1111 1111 1111 Ill IE 0 0 0111 L0 I II IEP Fl IE 1 EPS 14 00 FElT FIE FLINT II PIlE 1FlE TIlT NI EIIP 1111 1141 OLL SF10114 1111 T 00 11-4 11111 ElF 1-Il 101 F IPE 111491SLI 110 T 1111 POE 1-1-011 101 1 TFI 110111 IF 10011111002 9111 IIEFI 1 11I 1111 5 1 FIll 111IIljIFE- F IP' F111 Ill0111 T FE19102 lEE PFIIIIPEF 01 FF110111 II 010 44 1 winners et uetruii s 11th annual SnoFIi IL R Jack laf ret 2nd Unlimited Gordon Pearson 3rd Unlimited Warren Tiahrt 1st 2Meter Chris Carven best Jr-Sr Eric Tiahrt overall winner l Ray Hayes 2nd Standard Bob Scott 1st Standard present photo Gordon Pearson pic July 1981 47 $4250 Kit $5000 Assem Lu Northeast Engineering PO Box 6201M Bridgeport Ct 06606 aoesn t quite 01W lilaIwlIl fliS J / cu engine veIops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitts straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty NOW YOU GET CHOICE BASE 37 ENGINE Ready-to-run excludes features below can purchased separately Machined Balenced Flywheel$1000 Ball Bearing Front Housing$2000 Exhaust Manifold$750 Six-Bolt Hub$1400 Engine Mount$1200 COMPLETE MODIFIED 37 ENGINE Factory Bench-tested includes following HI-CARBON FORGEDONEpIECE CRANK AND CONNECTING ROD ELECTRONIC IGNITION SIX-BOLT HUB ANE POSITIONABLE EXHAUSi MANIFOLD BALL-BEARING ON CRANK Both Run ias Oil Comolete Parts & Service Send check M 0 O 0 UPS Add $400 shipping & Scale Judging states specifically model engine need completely concealed part engine can exposed non-scale open ings can made engine cooling Balancing wings Does model try turn speed changes Does loop end up helix Are aileron rudder transmiter trim controls constant need adjustment good chance common faults result wing panel being heavier other Checking balance edge beneath wing center will tell panel needs have some weight added Usually need discovered after wing finished addition weight tip going mar perfect scale finish An ounce two extra weight things Scale models can possible build wing balanced 122 Model Aviation Route 2 Box 9 300 Dtx1 Ifwst Beacher IL 60401 312 9462$t5 beginning likely wing need attention having balsa-sheeted cover over either foam balsa structure Open-frame work wings tend lighter less need balancing use small sensitive balance scale weigh sheet balsa average five-to sixfoot wing will require about dozen sheets 1/16-in 3/32-in balsa forthe cover sheets sorted two stacks six mixed give equal weight panel easy misled appearance smooth white sheet expect lightest turns out heavy Checking thickness micrometer may reveal reason sheets same thickness thicker sheets used same wing panel imbalance will probably result difference thickness can nuisance edge-gluing sheets before applying foam framework use fast-drying model cement joining edges pressing sheets down flat surface Pins inserted through joints flat angle whole sheet set end dry Scrape off excess cement top side shows uneven joints due unequal thickness becomes inner surface attaching foam structure speckled C-grain sheets should used along wing leading edge curvature greatest wing tips solid block balance can affected wrong choice balsa balance wing narrow edge determine whether two halves equal weight before applying tips last opportunity make compensations two tip blocks equal weight after carving outer surface can hollowed less other used lighter wing Right left tips can also made different weights wood As last resort piece metal such machine screw some lead shot can epoxied hollowed tip Now have carefully balanced wing its bare wood state application finish must watched closely preserve equal weight distribution especially true finishing polyester resin fiberglass cloth An extra coat resin panel could add ounces because unlike dope no loss due evaporation Adding small quantity extra resin near tip can method balancing adds something structural strength whereas metal weight dead load Dont try adding resin over dope will cure Bob Dolly Wiseher Rt 1 S-221 Lapham Peak Road Delaflela WI 53018 RC Soaring/Pruss Continued page 47 Next year cabin fever gets February 1 hold off couple weeks head Detroit Rumor has although contests tougher winters getting milder Soarcraft name out past has popped onto soaring scene again Ken Wardrip new owner interested Scale will find Glasfiugel 604 Diamant Libelle lineup have glass fuselages builtup wings tail Magnum 12 148-in Unlimited class bird also being revived too has all-glass fuselage built-up tail wing literature prices write Ken Ward rip/Soarcraft 25 I-D F Hacienda Ave. Camp bell CA 95008 Airtronics now know Lee Renaud has Airtronics full swing again much sought-after Sagitta sailplane kit available Also available hard find parts earlier planes such Aquila Lee says contact him directly canopies tow hooks wing wires other kit parts Write Lee Renaud/Airtronics 12160 Woodruff Ave Downey CA 90241 Archacopteryx No thats third line old eye-testing chart Jim Ealys company Jim specializes Scale threeviews plans some kits catalog lists sailplanes 920s up present list includes sailplanes no fewer 1 8 countries Most plans 1/5-scale blue line usually two sheets Kits include old primary glider SG-38 Grunau Baby II Monarch C Tandem Tutor catalog also includes other hardware non-scale kits Write Jim Ealy/Archaeopteryx Continued page 126 WL1 makers WPOPular PLUGDRIVER Fast & easy starting Lights J.glow plugs _______ adj twin plugs Bright plugs 12v battery sags 7voltsl No dropping resistors PHONE 203-333-1717 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW MASTER AIR~jJ3 IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 -~IASTEII AIRSCIUW PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO S FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 Avion Associates Box 120 Pottstown PA 19464 meantime support USA/F3B team Theres still time left Dan Pruss RR2 Box 49D Plainfleld IL 60544 RC Old-Timers/Mathews Continued page 49 comment perhaps pioneering four-stroke design wellmanufactured would have waited nearly forty years advent four-cycle massproduced model aircraft engines Oh yes thought terribly large hand ad picture mystery solved another opened photo ofthe 1935 Forster Little Hercules casting kits available Precision Service Co 10189 Crane Road Lindley NY 14858 opens up another mystery Art DeKaIb tells us engine debored destroked version earlier Apex seemingly no quite knows Apex engines relate later Forster 99 anyone can fill blanks story would like share readers Sandbagging 1938 Bill Effinger says Harold Carison 1938 Nationals won until very late day someone came along beat time says sandbagging til last possible moment SAM phenomena some folks think Pm prolific Ben Shere shaw must surely rank prolific model designers Old-Timer era quick check through John Pond catalog will find over dozen Shereshaw designs published and/or kitted between 1936 1939 Such familiar names Air Trails Sportster Cadet Cloud Cruiser Cumulus Eaglet Miss Exchange Club Nimbus Scientific Mercury Com modore featured Feb 81 issue magazine others products fertile mind Ben Shereshaw have always marveled man design ing publishing such profusion large models answer self-evident now have learned Ben taught high school Indus trial Arts time well being paid instructor Kresge Model Club days department stores promoted hobby departments sponsoring clubs Ben obviously designed models used available volunteer manpower around him construction crew way youngsters could benefit expertise turn able bang out great big Free Flights Although Shereshaws compensation magazine manufacturers minimal dollars must always relate what would buy As example recently have corresponding Bill Durand Omaha tells us placed Boeing 247 model ModelAirplane News 1934 received $5500 text drawings photos enough pay semesters tuition Omaha U have able pay fraction semesters tuition three college kids construction article though payment well excess $5500 As say its relative really Shereshaw designs marked beautiful flowing lines surfaces rarely used square surface flat section close study work reveals harmony line rarely matched designs contemporaries truly works art Shereshaw designs outstanding immediately indentifiable Super savings9 HL GLIDERS Fiberglass Materials EE 3 SATELLITE KITS FiberglassCloth5SqyarcisSlSO0E EU 17 OLD TIME GAS choice oz cloth LaminatingEpoxy Resin6hrcureS30Ocper galSend 25% for5 RUBBER 3 NORDIC LrquidMoldReleaseS3OO t6oZs1980 catalog9 COMPETITION GAS Epoxy Primer K&854000 per gal EpoxyPaintrhinnerK&RJSl5OopergalFUEL DT TIMERS -$1075 Polyester Resin K&B$20O0pet galF.A.I Model Supply Send check money order shippingcollect COO oka~ Call write Bob Smith RIC AircraftPO Box PO BOX 3957 TORRANCE CA 90510 Granada Hills CA 91344 213 3666872 LEISURE takes AIR DOUBLES flight time Odds ends several sources supply items relevant Old-Timer activities might prove helpful Trexler air-inflated balloon wheels Sig catalog available Hobby Horn find large 50cc plastic syringe veterinary supply great inflating Trexler also has bulb-type unit Y&O Yates Orwick wooden props available Hobby Horn Schmidt Custom Kits Some say finest props ever made use ignition motors Black neoprene tubing available Du Bro line must fuel system through diesel gasoline fuel will run commonly-available surgical vinyl tubing swell proportions pregnant earth worms used fossil fuels Diesel fuel contains kerosene hence fossil fuel Bakers AA castor oil Klotz Lubicin N-I synthetic lubes available pints quarts gallons Sig Amyl nitrate substitute Diesel Ignition Im prover available small quantities Henry Nelson 729 Valemont Dr Verona PA 15147 Dee B Mathews 506 South Walnut Greensburg KS 67054 writing advenmers mention reed about MA 126 Model Aviation SEND SASE FOR COMPLETE INFORMATION Now 8-10 mm electric power per flight LEISURE ELECTRONICS@ 11 Deerspring Irvine CA9271 40 714 552-4540
Edition: Model Aviation - 1981/07
Page Numbers: 46, 47, 122, 126
Soaring Dan Pruss ALMOST F3B Soaring enthusiasts classification F3B strikes terror heartsand thumbs has fliers quickly reminisce about last wing saw fold tow F3 B heading column reader suddenly becomes interested Helicop ters please read First off let say F3B isnt European concept sailplane flying competition LSF back 1971 proposed three-task con cept Duration Distance Speed proposal accepted ideas have part AMA rule book since Italian aero club took concept modified rules proposed FAT thats today Though easy contest manage straight duration event F3B tasks generate interest grab new followers events can just find way scheduled couple ideas have generated few interested folks just might allow club get taste F3B competition having trying outdesign last world champs slippery wonder ideas suggested mainly along lines generating interest F3B-type events among fliers using older types Sailplanesthe kind models fellows accustomed flyingrather running contest strictly enforces FAT rules Skip Miller twice USA team member 1977 World Champ came up idea club idea basically Place 13 second cap speed anything flys speed run 13 seconds less gets thousand Stan Watsons new F3B model has kinds desirable features quick-to-build low cost 2channel Sagitta-inspired sliding hatch quick access radio Bird has Hi Johnson foam wing cores covered sheet balsa Eppler 193 airfoil plywood-sided fuselage foam-filled rearfor rigidity strength Fuselage painted EconoKote covers wings tail Forward servo operates flying stab rear servo operates ailerons rudder same output arm Photo Dan Pruss 46 Model Aviation Control Jim Ealys Zogling 38 /4-scale nas 1 uu sq wing area Jims company IArcnaeopseryx offers plans 3-views 19 countries Photo J Ealy Jim Ealy Ill prepares launch 1/5-scale Granau Babyit highest static points Scale Glider 80 Nats Available Archaeopteryx see article Ealy photo points Flights slower 13 seconds would receive reduced scores oPSO points per second down 17 seconds 800 points Anything greater 17 seconds would worth 700 points Any attempt Speed would get no less 700 points Remember contest idea getting new blood figura tively speaking course F3B Any flight crossed center line safety line would also get 700 points rather customary zero course idea will require support flier Screamin Eagle can turn 95 Speed support will help new kid block entered Oly II As Duration task no changes required As matter fact kid Oly II could find himself beat Back team selection finals last year group us talked about ways get newcomer interested F3B Speed decided major drawbackbut because aver age Duration flier thinks doesnt have anything competitive us felt series contests could scheduled whereby Speed task would have cap say 17 seconds first contest Following contests series could have speed cap diminished second per contest would easy way new F3B competitors ease type flying Since method competition involves series contests would take groups have long summer schedule such East Coast Soaring League Great Lakes Soaring League Northwest Soaring Society SC2 run effective series last final suggestion run good old straight Duration/landing contests end contest day allow fliers interested fly F3B Speed task order make runs meaningful get flying allow flier get three runs succession could average three take best three whatever suits three-flight rounds could flown depending time number fliers Scoring Speed would separate counted Duration awards advantage suggestion would interested fliers have compete bystanders would exposed task ranks know always get few want meet new challenge Snow Fli Detroits annual winter bash took place February 15and ask annual eleventh row Anybody Out longer streak club sponsored events Drop line think yearly thermal underwear special local event 57 fliers will argue other wise Warren Tiahrt CDed event said summer contests should good Seventeen entered Unlimited young Eric Tiahrt outscored 1208 out possible 1395 Bob Scott 1024 best out of37 Standard class fliers Chris Corven won Jr-Sr 736 Two Meter entries could fly Standard Unlimited good ol CD waxed em 914 Continued page 122 MODELMAN IA T111 TOT F TTF 110FF 1111001 ITO IFI IrFI TI FIP TFOlI.P9FE1IT FOLFIF905 990 01 TO IF P FLOT 01 19206 990 111 TIFITI PP 11191 II F - 0 iF500200 FOIl TIIITI 1 101-IT lIEIO9TT55250 FE IF 1 1 lIE FH lIFE FOL PP 11101 FR 0S 1 50 501999 901 50 992299 FF121 FIll 119114Ff 40954199 FF121 F 11 TPOIF5P955199 F 111 00FF 1-91 41954299 LINT952199 FIT FE IFIMENT952999 FE 1-P II 110FF P F952099 FEIFIEF OE1IOPTEF 100 9 5 092 1999517500 Fl TOEs 0 00 EPI IF HEN952199 FIITOEFI El 0 F 019 F\ 99 l1H SEEP 99950999 POPlIN IF F4F 41 H F 9111 72111-12 SPEF 9954099 FIITOEN lIP 4F 4 II 00l1O NIFAFI BOFT 1951299 I1OL2EEFI P91 FF111 111-Il952799 401411 Elf 14 0 OP 9 ELNEE 00 455200 1111111ET 1 9 P911 94 2 0 9961- 49952299 FIIILEF 511 FFI1lPPEEP 010011 01955299 PEPPY OPO IOFIFE PIT 59514990 FF11 FI-IPE 11101 FITS 49512990 FEEP FNP0 1111111 PIT 14511 990 TEPLIOF LIFEP P192119 TEE9S1599 TO ELITE 1111 P1-F NOPLEF952999 111 OTFIL 1- SF1 2 SONLIPAF TUlIP SAL P111-0201909911900 011 III' PLO 0 102EP 9T 0 FIFE L ITT 1150 POET OLIMEEP 91111 911 LIFFIEf 9111 101111104 TO F1F101L1191119 FF1 OFI 1 -01191 P901- 9 4 FILL PElLET EFT TI Fl-lANGEFIPPEE 01011 T1L 15TH SE POET ITFIFITH 112000 FLIEPENT IIEPLIEP 900 EIII-IILIOTE2 101 OFEFINI 11T FEEl 111TH 002000 OP SINE RE 9111 01 99 OPEl 11119011 WITH 09109 EPEE 0 IEEEGIET 111TH OLL OPEEP EPEE FIPIIEFI NO IlIPO0F102IFIlI SF111' 1-111 102 911 FOlIOS 111111110 9IA9 EIISCOLINT 11111 NET 10111 110 119 TEE 1 9 9CFEPTEE OLIT lOLl ElLIOT OrE SI 19FF TO TOTOLINTL 101 FOIl * 9911 EFPIE9TION FATE01EPINFo 1-1011011110 19 00 TFI 10 00 92100 191 TI 9199105001 TO 4090 921 409 411011 9001Ff4 001TO SF10 900 5 IIIIEE '1 1111 1111 1111 Ill IE 0 0 0111 L0 I II IEP Fl IE 1 EPS 14 00 FElT FIE FLINT II PIlE 1FlE TIlT NI EIIP 1111 1141 OLL SF10114 1111 T 00 11-4 11111 ElF 1-Il 101 F IPE 111491SLI 110 T 1111 POE 1-1-011 101 1 TFI 110111 IF 10011111002 9111 IIEFI 1 11I 1111 5 1 FIll 111IIljIFE- F IP' F111 Ill0111 T FE19102 lEE PFIIIIPEF 01 FF110111 II 010 44 1 winners et uetruii s 11th annual SnoFIi IL R Jack laf ret 2nd Unlimited Gordon Pearson 3rd Unlimited Warren Tiahrt 1st 2Meter Chris Carven best Jr-Sr Eric Tiahrt overall winner l Ray Hayes 2nd Standard Bob Scott 1st Standard present photo Gordon Pearson pic July 1981 47 $4250 Kit $5000 Assem Lu Northeast Engineering PO Box 6201M Bridgeport Ct 06606 aoesn t quite 01W lilaIwlIl fliS J / cu engine veIops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitts straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty NOW YOU GET CHOICE BASE 37 ENGINE Ready-to-run excludes features below can purchased separately Machined Balenced Flywheel$1000 Ball Bearing Front Housing$2000 Exhaust Manifold$750 Six-Bolt Hub$1400 Engine Mount$1200 COMPLETE MODIFIED 37 ENGINE Factory Bench-tested includes following HI-CARBON FORGEDONEpIECE CRANK AND CONNECTING ROD ELECTRONIC IGNITION SIX-BOLT HUB ANE POSITIONABLE EXHAUSi MANIFOLD BALL-BEARING ON CRANK Both Run ias Oil Comolete Parts & Service Send check M 0 O 0 UPS Add $400 shipping & Scale Judging states specifically model engine need completely concealed part engine can exposed non-scale open ings can made engine cooling Balancing wings Does model try turn speed changes Does loop end up helix Are aileron rudder transmiter trim controls constant need adjustment good chance common faults result wing panel being heavier other Checking balance edge beneath wing center will tell panel needs have some weight added Usually need discovered after wing finished addition weight tip going mar perfect scale finish An ounce two extra weight things Scale models can possible build wing balanced 122 Model Aviation Route 2 Box 9 300 Dtx1 Ifwst Beacher IL 60401 312 9462$t5 beginning likely wing need attention having balsa-sheeted cover over either foam balsa structure Open-frame work wings tend lighter less need balancing use small sensitive balance scale weigh sheet balsa average five-to sixfoot wing will require about dozen sheets 1/16-in 3/32-in balsa forthe cover sheets sorted two stacks six mixed give equal weight panel easy misled appearance smooth white sheet expect lightest turns out heavy Checking thickness micrometer may reveal reason sheets same thickness thicker sheets used same wing panel imbalance will probably result difference thickness can nuisance edge-gluing sheets before applying foam framework use fast-drying model cement joining edges pressing sheets down flat surface Pins inserted through joints flat angle whole sheet set end dry Scrape off excess cement top side shows uneven joints due unequal thickness becomes inner surface attaching foam structure speckled C-grain sheets should used along wing leading edge curvature greatest wing tips solid block balance can affected wrong choice balsa balance wing narrow edge determine whether two halves equal weight before applying tips last opportunity make compensations two tip blocks equal weight after carving outer surface can hollowed less other used lighter wing Right left tips can also made different weights wood As last resort piece metal such machine screw some lead shot can epoxied hollowed tip Now have carefully balanced wing its bare wood state application finish must watched closely preserve equal weight distribution especially true finishing polyester resin fiberglass cloth An extra coat resin panel could add ounces because unlike dope no loss due evaporation Adding small quantity extra resin near tip can method balancing adds something structural strength whereas metal weight dead load Dont try adding resin over dope will cure Bob Dolly Wiseher Rt 1 S-221 Lapham Peak Road Delaflela WI 53018 RC Soaring/Pruss Continued page 47 Next year cabin fever gets February 1 hold off couple weeks head Detroit Rumor has although contests tougher winters getting milder Soarcraft name out past has popped onto soaring scene again Ken Wardrip new owner interested Scale will find Glasfiugel 604 Diamant Libelle lineup have glass fuselages builtup wings tail Magnum 12 148-in Unlimited class bird also being revived too has all-glass fuselage built-up tail wing literature prices write Ken Ward rip/Soarcraft 25 I-D F Hacienda Ave. Camp bell CA 95008 Airtronics now know Lee Renaud has Airtronics full swing again much sought-after Sagitta sailplane kit available Also available hard find parts earlier planes such Aquila Lee says contact him directly canopies tow hooks wing wires other kit parts Write Lee Renaud/Airtronics 12160 Woodruff Ave Downey CA 90241 Archacopteryx No thats third line old eye-testing chart Jim Ealys company Jim specializes Scale threeviews plans some kits catalog lists sailplanes 920s up present list includes sailplanes no fewer 1 8 countries Most plans 1/5-scale blue line usually two sheets Kits include old primary glider SG-38 Grunau Baby II Monarch C Tandem Tutor catalog also includes other hardware non-scale kits Write Jim Ealy/Archaeopteryx Continued page 126 WL1 makers WPOPular PLUGDRIVER Fast & easy starting Lights J.glow plugs _______ adj twin plugs Bright plugs 12v battery sags 7voltsl No dropping resistors PHONE 203-333-1717 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW MASTER AIR~jJ3 IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 -~IASTEII AIRSCIUW PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO S FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 Avion Associates Box 120 Pottstown PA 19464 meantime support USA/F3B team Theres still time left Dan Pruss RR2 Box 49D Plainfleld IL 60544 RC Old-Timers/Mathews Continued page 49 comment perhaps pioneering four-stroke design wellmanufactured would have waited nearly forty years advent four-cycle massproduced model aircraft engines Oh yes thought terribly large hand ad picture mystery solved another opened photo ofthe 1935 Forster Little Hercules casting kits available Precision Service Co 10189 Crane Road Lindley NY 14858 opens up another mystery Art DeKaIb tells us engine debored destroked version earlier Apex seemingly no quite knows Apex engines relate later Forster 99 anyone can fill blanks story would like share readers Sandbagging 1938 Bill Effinger says Harold Carison 1938 Nationals won until very late day someone came along beat time says sandbagging til last possible moment SAM phenomena some folks think Pm prolific Ben Shere shaw must surely rank prolific model designers Old-Timer era quick check through John Pond catalog will find over dozen Shereshaw designs published and/or kitted between 1936 1939 Such familiar names Air Trails Sportster Cadet Cloud Cruiser Cumulus Eaglet Miss Exchange Club Nimbus Scientific Mercury Com modore featured Feb 81 issue magazine others products fertile mind Ben Shereshaw have always marveled man design ing publishing such profusion large models answer self-evident now have learned Ben taught high school Indus trial Arts time well being paid instructor Kresge Model Club days department stores promoted hobby departments sponsoring clubs Ben obviously designed models used available volunteer manpower around him construction crew way youngsters could benefit expertise turn able bang out great big Free Flights Although Shereshaws compensation magazine manufacturers minimal dollars must always relate what would buy As example recently have corresponding Bill Durand Omaha tells us placed Boeing 247 model ModelAirplane News 1934 received $5500 text drawings photos enough pay semesters tuition Omaha U have able pay fraction semesters tuition three college kids construction article though payment well excess $5500 As say its relative really Shereshaw designs marked beautiful flowing lines surfaces rarely used square surface flat section close study work reveals harmony line rarely matched designs contemporaries truly works art Shereshaw designs outstanding immediately indentifiable Super savings9 HL GLIDERS Fiberglass Materials EE 3 SATELLITE KITS FiberglassCloth5SqyarcisSlSO0E EU 17 OLD TIME GAS choice oz cloth LaminatingEpoxy Resin6hrcureS30Ocper galSend 25% for5 RUBBER 3 NORDIC LrquidMoldReleaseS3OO t6oZs1980 catalog9 COMPETITION GAS Epoxy Primer K&854000 per gal EpoxyPaintrhinnerK&RJSl5OopergalFUEL DT TIMERS -$1075 Polyester Resin K&B$20O0pet galF.A.I Model Supply Send check money order shippingcollect COO oka~ Call write Bob Smith RIC AircraftPO Box PO BOX 3957 TORRANCE CA 90510 Granada Hills CA 91344 213 3666872 LEISURE takes AIR DOUBLES flight time Odds ends several sources supply items relevant Old-Timer activities might prove helpful Trexler air-inflated balloon wheels Sig catalog available Hobby Horn find large 50cc plastic syringe veterinary supply great inflating Trexler also has bulb-type unit Y&O Yates Orwick wooden props available Hobby Horn Schmidt Custom Kits Some say finest props ever made use ignition motors Black neoprene tubing available Du Bro line must fuel system through diesel gasoline fuel will run commonly-available surgical vinyl tubing swell proportions pregnant earth worms used fossil fuels Diesel fuel contains kerosene hence fossil fuel Bakers AA castor oil Klotz Lubicin N-I synthetic lubes available pints quarts gallons Sig Amyl nitrate substitute Diesel Ignition Im prover available small quantities Henry Nelson 729 Valemont Dr Verona PA 15147 Dee B Mathews 506 South Walnut Greensburg KS 67054 writing advenmers mention reed about MA 126 Model Aviation SEND SASE FOR COMPLETE INFORMATION Now 8-10 mm electric power per flight LEISURE ELECTRONICS@ 11 Deerspring Irvine CA9271 40 714 552-4540
Edition: Model Aviation - 1981/07
Page Numbers: 46, 47, 122, 126
Soaring Dan Pruss ALMOST F3B Soaring enthusiasts classification F3B strikes terror heartsand thumbs has fliers quickly reminisce about last wing saw fold tow F3 B heading column reader suddenly becomes interested Helicop ters please read First off let say F3B isnt European concept sailplane flying competition LSF back 1971 proposed three-task con cept Duration Distance Speed proposal accepted ideas have part AMA rule book since Italian aero club took concept modified rules proposed FAT thats today Though easy contest manage straight duration event F3B tasks generate interest grab new followers events can just find way scheduled couple ideas have generated few interested folks just might allow club get taste F3B competition having trying outdesign last world champs slippery wonder ideas suggested mainly along lines generating interest F3B-type events among fliers using older types Sailplanesthe kind models fellows accustomed flyingrather running contest strictly enforces FAT rules Skip Miller twice USA team member 1977 World Champ came up idea club idea basically Place 13 second cap speed anything flys speed run 13 seconds less gets thousand Stan Watsons new F3B model has kinds desirable features quick-to-build low cost 2channel Sagitta-inspired sliding hatch quick access radio Bird has Hi Johnson foam wing cores covered sheet balsa Eppler 193 airfoil plywood-sided fuselage foam-filled rearfor rigidity strength Fuselage painted EconoKote covers wings tail Forward servo operates flying stab rear servo operates ailerons rudder same output arm Photo Dan Pruss 46 Model Aviation Control Jim Ealys Zogling 38 /4-scale nas 1 uu sq wing area Jims company IArcnaeopseryx offers plans 3-views 19 countries Photo J Ealy Jim Ealy Ill prepares launch 1/5-scale Granau Babyit highest static points Scale Glider 80 Nats Available Archaeopteryx see article Ealy photo points Flights slower 13 seconds would receive reduced scores oPSO points per second down 17 seconds 800 points Anything greater 17 seconds would worth 700 points Any attempt Speed would get no less 700 points Remember contest idea getting new blood figura tively speaking course F3B Any flight crossed center line safety line would also get 700 points rather customary zero course idea will require support flier Screamin Eagle can turn 95 Speed support will help new kid block entered Oly II As Duration task no changes required As matter fact kid Oly II could find himself beat Back team selection finals last year group us talked about ways get newcomer interested F3B Speed decided major drawbackbut because aver age Duration flier thinks doesnt have anything competitive us felt series contests could scheduled whereby Speed task would have cap say 17 seconds first contest Following contests series could have speed cap diminished second per contest would easy way new F3B competitors ease type flying Since method competition involves series contests would take groups have long summer schedule such East Coast Soaring League Great Lakes Soaring League Northwest Soaring Society SC2 run effective series last final suggestion run good old straight Duration/landing contests end contest day allow fliers interested fly F3B Speed task order make runs meaningful get flying allow flier get three runs succession could average three take best three whatever suits three-flight rounds could flown depending time number fliers Scoring Speed would separate counted Duration awards advantage suggestion would interested fliers have compete bystanders would exposed task ranks know always get few want meet new challenge Snow Fli Detroits annual winter bash took place February 15and ask annual eleventh row Anybody Out longer streak club sponsored events Drop line think yearly thermal underwear special local event 57 fliers will argue other wise Warren Tiahrt CDed event said summer contests should good Seventeen entered Unlimited young Eric Tiahrt outscored 1208 out possible 1395 Bob Scott 1024 best out of37 Standard class fliers Chris Corven won Jr-Sr 736 Two Meter entries could fly Standard Unlimited good ol CD waxed em 914 Continued page 122 MODELMAN IA T111 TOT F TTF 110FF 1111001 ITO IFI IrFI TI FIP TFOlI.P9FE1IT FOLFIF905 990 01 TO IF P FLOT 01 19206 990 111 TIFITI PP 11191 II F - 0 iF500200 FOIl TIIITI 1 101-IT lIEIO9TT55250 FE IF 1 1 lIE FH lIFE FOL PP 11101 FR 0S 1 50 501999 901 50 992299 FF121 FIll 119114Ff 40954199 FF121 F 11 TPOIF5P955199 F 111 00FF 1-91 41954299 LINT952199 FIT FE IFIMENT952999 FE 1-P II 110FF P F952099 FEIFIEF OE1IOPTEF 100 9 5 092 1999517500 Fl TOEs 0 00 EPI IF HEN952199 FIITOEFI El 0 F 019 F\ 99 l1H SEEP 99950999 POPlIN IF F4F 41 H F 9111 72111-12 SPEF 9954099 FIITOEN lIP 4F 4 II 00l1O NIFAFI BOFT 1951299 I1OL2EEFI P91 FF111 111-Il952799 401411 Elf 14 0 OP 9 ELNEE 00 455200 1111111ET 1 9 P911 94 2 0 9961- 49952299 FIIILEF 511 FFI1lPPEEP 010011 01955299 PEPPY OPO IOFIFE PIT 59514990 FF11 FI-IPE 11101 FITS 49512990 FEEP FNP0 1111111 PIT 14511 990 TEPLIOF LIFEP P192119 TEE9S1599 TO ELITE 1111 P1-F NOPLEF952999 111 OTFIL 1- SF1 2 SONLIPAF TUlIP SAL P111-0201909911900 011 III' PLO 0 102EP 9T 0 FIFE L ITT 1150 POET OLIMEEP 91111 911 LIFFIEf 9111 101111104 TO F1F101L1191119 FF1 OFI 1 -01191 P901- 9 4 FILL PElLET EFT TI Fl-lANGEFIPPEE 01011 T1L 15TH SE POET ITFIFITH 112000 FLIEPENT IIEPLIEP 900 EIII-IILIOTE2 101 OFEFINI 11T FEEl 111TH 002000 OP SINE RE 9111 01 99 OPEl 11119011 WITH 09109 EPEE 0 IEEEGIET 111TH OLL OPEEP EPEE FIPIIEFI NO IlIPO0F102IFIlI SF111' 1-111 102 911 FOlIOS 111111110 9IA9 EIISCOLINT 11111 NET 10111 110 119 TEE 1 9 9CFEPTEE OLIT lOLl ElLIOT OrE SI 19FF TO TOTOLINTL 101 FOIl * 9911 EFPIE9TION FATE01EPINFo 1-1011011110 19 00 TFI 10 00 92100 191 TI 9199105001 TO 4090 921 409 411011 9001Ff4 001TO SF10 900 5 IIIIEE '1 1111 1111 1111 Ill IE 0 0 0111 L0 I II IEP Fl IE 1 EPS 14 00 FElT FIE FLINT II PIlE 1FlE TIlT NI EIIP 1111 1141 OLL SF10114 1111 T 00 11-4 11111 ElF 1-Il 101 F IPE 111491SLI 110 T 1111 POE 1-1-011 101 1 TFI 110111 IF 10011111002 9111 IIEFI 1 11I 1111 5 1 FIll 111IIljIFE- F IP' F111 Ill0111 T FE19102 lEE PFIIIIPEF 01 FF110111 II 010 44 1 winners et uetruii s 11th annual SnoFIi IL R Jack laf ret 2nd Unlimited Gordon Pearson 3rd Unlimited Warren Tiahrt 1st 2Meter Chris Carven best Jr-Sr Eric Tiahrt overall winner l Ray Hayes 2nd Standard Bob Scott 1st Standard present photo Gordon Pearson pic July 1981 47 $4250 Kit $5000 Assem Lu Northeast Engineering PO Box 6201M Bridgeport Ct 06606 aoesn t quite 01W lilaIwlIl fliS J / cu engine veIops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitts straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty NOW YOU GET CHOICE BASE 37 ENGINE Ready-to-run excludes features below can purchased separately Machined Balenced Flywheel$1000 Ball Bearing Front Housing$2000 Exhaust Manifold$750 Six-Bolt Hub$1400 Engine Mount$1200 COMPLETE MODIFIED 37 ENGINE Factory Bench-tested includes following HI-CARBON FORGEDONEpIECE CRANK AND CONNECTING ROD ELECTRONIC IGNITION SIX-BOLT HUB ANE POSITIONABLE EXHAUSi MANIFOLD BALL-BEARING ON CRANK Both Run ias Oil Comolete Parts & Service Send check M 0 O 0 UPS Add $400 shipping & Scale Judging states specifically model engine need completely concealed part engine can exposed non-scale open ings can made engine cooling Balancing wings Does model try turn speed changes Does loop end up helix Are aileron rudder transmiter trim controls constant need adjustment good chance common faults result wing panel being heavier other Checking balance edge beneath wing center will tell panel needs have some weight added Usually need discovered after wing finished addition weight tip going mar perfect scale finish An ounce two extra weight things Scale models can possible build wing balanced 122 Model Aviation Route 2 Box 9 300 Dtx1 Ifwst Beacher IL 60401 312 9462$t5 beginning likely wing need attention having balsa-sheeted cover over either foam balsa structure Open-frame work wings tend lighter less need balancing use small sensitive balance scale weigh sheet balsa average five-to sixfoot wing will require about dozen sheets 1/16-in 3/32-in balsa forthe cover sheets sorted two stacks six mixed give equal weight panel easy misled appearance smooth white sheet expect lightest turns out heavy Checking thickness micrometer may reveal reason sheets same thickness thicker sheets used same wing panel imbalance will probably result difference thickness can nuisance edge-gluing sheets before applying foam framework use fast-drying model cement joining edges pressing sheets down flat surface Pins inserted through joints flat angle whole sheet set end dry Scrape off excess cement top side shows uneven joints due unequal thickness becomes inner surface attaching foam structure speckled C-grain sheets should used along wing leading edge curvature greatest wing tips solid block balance can affected wrong choice balsa balance wing narrow edge determine whether two halves equal weight before applying tips last opportunity make compensations two tip blocks equal weight after carving outer surface can hollowed less other used lighter wing Right left tips can also made different weights wood As last resort piece metal such machine screw some lead shot can epoxied hollowed tip Now have carefully balanced wing its bare wood state application finish must watched closely preserve equal weight distribution especially true finishing polyester resin fiberglass cloth An extra coat resin panel could add ounces because unlike dope no loss due evaporation Adding small quantity extra resin near tip can method balancing adds something structural strength whereas metal weight dead load Dont try adding resin over dope will cure Bob Dolly Wiseher Rt 1 S-221 Lapham Peak Road Delaflela WI 53018 RC Soaring/Pruss Continued page 47 Next year cabin fever gets February 1 hold off couple weeks head Detroit Rumor has although contests tougher winters getting milder Soarcraft name out past has popped onto soaring scene again Ken Wardrip new owner interested Scale will find Glasfiugel 604 Diamant Libelle lineup have glass fuselages builtup wings tail Magnum 12 148-in Unlimited class bird also being revived too has all-glass fuselage built-up tail wing literature prices write Ken Ward rip/Soarcraft 25 I-D F Hacienda Ave. Camp bell CA 95008 Airtronics now know Lee Renaud has Airtronics full swing again much sought-after Sagitta sailplane kit available Also available hard find parts earlier planes such Aquila Lee says contact him directly canopies tow hooks wing wires other kit parts Write Lee Renaud/Airtronics 12160 Woodruff Ave Downey CA 90241 Archacopteryx No thats third line old eye-testing chart Jim Ealys company Jim specializes Scale threeviews plans some kits catalog lists sailplanes 920s up present list includes sailplanes no fewer 1 8 countries Most plans 1/5-scale blue line usually two sheets Kits include old primary glider SG-38 Grunau Baby II Monarch C Tandem Tutor catalog also includes other hardware non-scale kits Write Jim Ealy/Archaeopteryx Continued page 126 WL1 makers WPOPular PLUGDRIVER Fast & easy starting Lights J.glow plugs _______ adj twin plugs Bright plugs 12v battery sags 7voltsl No dropping resistors PHONE 203-333-1717 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW MASTER AIR~jJ3 IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 -~IASTEII AIRSCIUW PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO S FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 Avion Associates Box 120 Pottstown PA 19464 meantime support USA/F3B team Theres still time left Dan Pruss RR2 Box 49D Plainfleld IL 60544 RC Old-Timers/Mathews Continued page 49 comment perhaps pioneering four-stroke design wellmanufactured would have waited nearly forty years advent four-cycle massproduced model aircraft engines Oh yes thought terribly large hand ad picture mystery solved another opened photo ofthe 1935 Forster Little Hercules casting kits available Precision Service Co 10189 Crane Road Lindley NY 14858 opens up another mystery Art DeKaIb tells us engine debored destroked version earlier Apex seemingly no quite knows Apex engines relate later Forster 99 anyone can fill blanks story would like share readers Sandbagging 1938 Bill Effinger says Harold Carison 1938 Nationals won until very late day someone came along beat time says sandbagging til last possible moment SAM phenomena some folks think Pm prolific Ben Shere shaw must surely rank prolific model designers Old-Timer era quick check through John Pond catalog will find over dozen Shereshaw designs published and/or kitted between 1936 1939 Such familiar names Air Trails Sportster Cadet Cloud Cruiser Cumulus Eaglet Miss Exchange Club Nimbus Scientific Mercury Com modore featured Feb 81 issue magazine others products fertile mind Ben Shereshaw have always marveled man design ing publishing such profusion large models answer self-evident now have learned Ben taught high school Indus trial Arts time well being paid instructor Kresge Model Club days department stores promoted hobby departments sponsoring clubs Ben obviously designed models used available volunteer manpower around him construction crew way youngsters could benefit expertise turn able bang out great big Free Flights Although Shereshaws compensation magazine manufacturers minimal dollars must always relate what would buy As example recently have corresponding Bill Durand Omaha tells us placed Boeing 247 model ModelAirplane News 1934 received $5500 text drawings photos enough pay semesters tuition Omaha U have able pay fraction semesters tuition three college kids construction article though payment well excess $5500 As say its relative really Shereshaw designs marked beautiful flowing lines surfaces rarely used square surface flat section close study work reveals harmony line rarely matched designs contemporaries truly works art Shereshaw designs outstanding immediately indentifiable Super savings9 HL GLIDERS Fiberglass Materials EE 3 SATELLITE KITS FiberglassCloth5SqyarcisSlSO0E EU 17 OLD TIME GAS choice oz cloth LaminatingEpoxy Resin6hrcureS30Ocper galSend 25% for5 RUBBER 3 NORDIC LrquidMoldReleaseS3OO t6oZs1980 catalog9 COMPETITION GAS Epoxy Primer K&854000 per gal EpoxyPaintrhinnerK&RJSl5OopergalFUEL DT TIMERS -$1075 Polyester Resin K&B$20O0pet galF.A.I Model Supply Send check money order shippingcollect COO oka~ Call write Bob Smith RIC AircraftPO Box PO BOX 3957 TORRANCE CA 90510 Granada Hills CA 91344 213 3666872 LEISURE takes AIR DOUBLES flight time Odds ends several sources supply items relevant Old-Timer activities might prove helpful Trexler air-inflated balloon wheels Sig catalog available Hobby Horn find large 50cc plastic syringe veterinary supply great inflating Trexler also has bulb-type unit Y&O Yates Orwick wooden props available Hobby Horn Schmidt Custom Kits Some say finest props ever made use ignition motors Black neoprene tubing available Du Bro line must fuel system through diesel gasoline fuel will run commonly-available surgical vinyl tubing swell proportions pregnant earth worms used fossil fuels Diesel fuel contains kerosene hence fossil fuel Bakers AA castor oil Klotz Lubicin N-I synthetic lubes available pints quarts gallons Sig Amyl nitrate substitute Diesel Ignition Im prover available small quantities Henry Nelson 729 Valemont Dr Verona PA 15147 Dee B Mathews 506 South Walnut Greensburg KS 67054 writing advenmers mention reed about MA 126 Model Aviation SEND SASE FOR COMPLETE INFORMATION Now 8-10 mm electric power per flight LEISURE ELECTRONICS@ 11 Deerspring Irvine CA9271 40 714 552-4540
Edition: Model Aviation - 1981/07
Page Numbers: 46, 47, 122, 126
Soaring Dan Pruss ALMOST F3B Soaring enthusiasts classification F3B strikes terror heartsand thumbs has fliers quickly reminisce about last wing saw fold tow F3 B heading column reader suddenly becomes interested Helicop ters please read First off let say F3B isnt European concept sailplane flying competition LSF back 1971 proposed three-task con cept Duration Distance Speed proposal accepted ideas have part AMA rule book since Italian aero club took concept modified rules proposed FAT thats today Though easy contest manage straight duration event F3B tasks generate interest grab new followers events can just find way scheduled couple ideas have generated few interested folks just might allow club get taste F3B competition having trying outdesign last world champs slippery wonder ideas suggested mainly along lines generating interest F3B-type events among fliers using older types Sailplanesthe kind models fellows accustomed flyingrather running contest strictly enforces FAT rules Skip Miller twice USA team member 1977 World Champ came up idea club idea basically Place 13 second cap speed anything flys speed run 13 seconds less gets thousand Stan Watsons new F3B model has kinds desirable features quick-to-build low cost 2channel Sagitta-inspired sliding hatch quick access radio Bird has Hi Johnson foam wing cores covered sheet balsa Eppler 193 airfoil plywood-sided fuselage foam-filled rearfor rigidity strength Fuselage painted EconoKote covers wings tail Forward servo operates flying stab rear servo operates ailerons rudder same output arm Photo Dan Pruss 46 Model Aviation Control Jim Ealys Zogling 38 /4-scale nas 1 uu sq wing area Jims company IArcnaeopseryx offers plans 3-views 19 countries Photo J Ealy Jim Ealy Ill prepares launch 1/5-scale Granau Babyit highest static points Scale Glider 80 Nats Available Archaeopteryx see article Ealy photo points Flights slower 13 seconds would receive reduced scores oPSO points per second down 17 seconds 800 points Anything greater 17 seconds would worth 700 points Any attempt Speed would get no less 700 points Remember contest idea getting new blood figura tively speaking course F3B Any flight crossed center line safety line would also get 700 points rather customary zero course idea will require support flier Screamin Eagle can turn 95 Speed support will help new kid block entered Oly II As Duration task no changes required As matter fact kid Oly II could find himself beat Back team selection finals last year group us talked about ways get newcomer interested F3B Speed decided major drawbackbut because aver age Duration flier thinks doesnt have anything competitive us felt series contests could scheduled whereby Speed task would have cap say 17 seconds first contest Following contests series could have speed cap diminished second per contest would easy way new F3B competitors ease type flying Since method competition involves series contests would take groups have long summer schedule such East Coast Soaring League Great Lakes Soaring League Northwest Soaring Society SC2 run effective series last final suggestion run good old straight Duration/landing contests end contest day allow fliers interested fly F3B Speed task order make runs meaningful get flying allow flier get three runs succession could average three take best three whatever suits three-flight rounds could flown depending time number fliers Scoring Speed would separate counted Duration awards advantage suggestion would interested fliers have compete bystanders would exposed task ranks know always get few want meet new challenge Snow Fli Detroits annual winter bash took place February 15and ask annual eleventh row Anybody Out longer streak club sponsored events Drop line think yearly thermal underwear special local event 57 fliers will argue other wise Warren Tiahrt CDed event said summer contests should good Seventeen entered Unlimited young Eric Tiahrt outscored 1208 out possible 1395 Bob Scott 1024 best out of37 Standard class fliers Chris Corven won Jr-Sr 736 Two Meter entries could fly Standard Unlimited good ol CD waxed em 914 Continued page 122 MODELMAN IA T111 TOT F TTF 110FF 1111001 ITO IFI IrFI TI FIP TFOlI.P9FE1IT FOLFIF905 990 01 TO IF P FLOT 01 19206 990 111 TIFITI PP 11191 II F - 0 iF500200 FOIl TIIITI 1 101-IT lIEIO9TT55250 FE IF 1 1 lIE FH lIFE FOL PP 11101 FR 0S 1 50 501999 901 50 992299 FF121 FIll 119114Ff 40954199 FF121 F 11 TPOIF5P955199 F 111 00FF 1-91 41954299 LINT952199 FIT FE IFIMENT952999 FE 1-P II 110FF P F952099 FEIFIEF OE1IOPTEF 100 9 5 092 1999517500 Fl TOEs 0 00 EPI IF HEN952199 FIITOEFI El 0 F 019 F\ 99 l1H SEEP 99950999 POPlIN IF F4F 41 H F 9111 72111-12 SPEF 9954099 FIITOEN lIP 4F 4 II 00l1O NIFAFI BOFT 1951299 I1OL2EEFI P91 FF111 111-Il952799 401411 Elf 14 0 OP 9 ELNEE 00 455200 1111111ET 1 9 P911 94 2 0 9961- 49952299 FIIILEF 511 FFI1lPPEEP 010011 01955299 PEPPY OPO IOFIFE PIT 59514990 FF11 FI-IPE 11101 FITS 49512990 FEEP FNP0 1111111 PIT 14511 990 TEPLIOF LIFEP P192119 TEE9S1599 TO ELITE 1111 P1-F NOPLEF952999 111 OTFIL 1- SF1 2 SONLIPAF TUlIP SAL P111-0201909911900 011 III' PLO 0 102EP 9T 0 FIFE L ITT 1150 POET OLIMEEP 91111 911 LIFFIEf 9111 101111104 TO F1F101L1191119 FF1 OFI 1 -01191 P901- 9 4 FILL PElLET EFT TI Fl-lANGEFIPPEE 01011 T1L 15TH SE POET ITFIFITH 112000 FLIEPENT IIEPLIEP 900 EIII-IILIOTE2 101 OFEFINI 11T FEEl 111TH 002000 OP SINE RE 9111 01 99 OPEl 11119011 WITH 09109 EPEE 0 IEEEGIET 111TH OLL OPEEP EPEE FIPIIEFI NO IlIPO0F102IFIlI SF111' 1-111 102 911 FOlIOS 111111110 9IA9 EIISCOLINT 11111 NET 10111 110 119 TEE 1 9 9CFEPTEE OLIT lOLl ElLIOT OrE SI 19FF TO TOTOLINTL 101 FOIl * 9911 EFPIE9TION FATE01EPINFo 1-1011011110 19 00 TFI 10 00 92100 191 TI 9199105001 TO 4090 921 409 411011 9001Ff4 001TO SF10 900 5 IIIIEE '1 1111 1111 1111 Ill IE 0 0 0111 L0 I II IEP Fl IE 1 EPS 14 00 FElT FIE FLINT II PIlE 1FlE TIlT NI EIIP 1111 1141 OLL SF10114 1111 T 00 11-4 11111 ElF 1-Il 101 F IPE 111491SLI 110 T 1111 POE 1-1-011 101 1 TFI 110111 IF 10011111002 9111 IIEFI 1 11I 1111 5 1 FIll 111IIljIFE- F IP' F111 Ill0111 T FE19102 lEE PFIIIIPEF 01 FF110111 II 010 44 1 winners et uetruii s 11th annual SnoFIi IL R Jack laf ret 2nd Unlimited Gordon Pearson 3rd Unlimited Warren Tiahrt 1st 2Meter Chris Carven best Jr-Sr Eric Tiahrt overall winner l Ray Hayes 2nd Standard Bob Scott 1st Standard present photo Gordon Pearson pic July 1981 47 $4250 Kit $5000 Assem Lu Northeast Engineering PO Box 6201M Bridgeport Ct 06606 aoesn t quite 01W lilaIwlIl fliS J / cu engine veIops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitts straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty NOW YOU GET CHOICE BASE 37 ENGINE Ready-to-run excludes features below can purchased separately Machined Balenced Flywheel$1000 Ball Bearing Front Housing$2000 Exhaust Manifold$750 Six-Bolt Hub$1400 Engine Mount$1200 COMPLETE MODIFIED 37 ENGINE Factory Bench-tested includes following HI-CARBON FORGEDONEpIECE CRANK AND CONNECTING ROD ELECTRONIC IGNITION SIX-BOLT HUB ANE POSITIONABLE EXHAUSi MANIFOLD BALL-BEARING ON CRANK Both Run ias Oil Comolete Parts & Service Send check M 0 O 0 UPS Add $400 shipping & Scale Judging states specifically model engine need completely concealed part engine can exposed non-scale open ings can made engine cooling Balancing wings Does model try turn speed changes Does loop end up helix Are aileron rudder transmiter trim controls constant need adjustment good chance common faults result wing panel being heavier other Checking balance edge beneath wing center will tell panel needs have some weight added Usually need discovered after wing finished addition weight tip going mar perfect scale finish An ounce two extra weight things Scale models can possible build wing balanced 122 Model Aviation Route 2 Box 9 300 Dtx1 Ifwst Beacher IL 60401 312 9462$t5 beginning likely wing need attention having balsa-sheeted cover over either foam balsa structure Open-frame work wings tend lighter less need balancing use small sensitive balance scale weigh sheet balsa average five-to sixfoot wing will require about dozen sheets 1/16-in 3/32-in balsa forthe cover sheets sorted two stacks six mixed give equal weight panel easy misled appearance smooth white sheet expect lightest turns out heavy Checking thickness micrometer may reveal reason sheets same thickness thicker sheets used same wing panel imbalance will probably result difference thickness can nuisance edge-gluing sheets before applying foam framework use fast-drying model cement joining edges pressing sheets down flat surface Pins inserted through joints flat angle whole sheet set end dry Scrape off excess cement top side shows uneven joints due unequal thickness becomes inner surface attaching foam structure speckled C-grain sheets should used along wing leading edge curvature greatest wing tips solid block balance can affected wrong choice balsa balance wing narrow edge determine whether two halves equal weight before applying tips last opportunity make compensations two tip blocks equal weight after carving outer surface can hollowed less other used lighter wing Right left tips can also made different weights wood As last resort piece metal such machine screw some lead shot can epoxied hollowed tip Now have carefully balanced wing its bare wood state application finish must watched closely preserve equal weight distribution especially true finishing polyester resin fiberglass cloth An extra coat resin panel could add ounces because unlike dope no loss due evaporation Adding small quantity extra resin near tip can method balancing adds something structural strength whereas metal weight dead load Dont try adding resin over dope will cure Bob Dolly Wiseher Rt 1 S-221 Lapham Peak Road Delaflela WI 53018 RC Soaring/Pruss Continued page 47 Next year cabin fever gets February 1 hold off couple weeks head Detroit Rumor has although contests tougher winters getting milder Soarcraft name out past has popped onto soaring scene again Ken Wardrip new owner interested Scale will find Glasfiugel 604 Diamant Libelle lineup have glass fuselages builtup wings tail Magnum 12 148-in Unlimited class bird also being revived too has all-glass fuselage built-up tail wing literature prices write Ken Ward rip/Soarcraft 25 I-D F Hacienda Ave. Camp bell CA 95008 Airtronics now know Lee Renaud has Airtronics full swing again much sought-after Sagitta sailplane kit available Also available hard find parts earlier planes such Aquila Lee says contact him directly canopies tow hooks wing wires other kit parts Write Lee Renaud/Airtronics 12160 Woodruff Ave Downey CA 90241 Archacopteryx No thats third line old eye-testing chart Jim Ealys company Jim specializes Scale threeviews plans some kits catalog lists sailplanes 920s up present list includes sailplanes no fewer 1 8 countries Most plans 1/5-scale blue line usually two sheets Kits include old primary glider SG-38 Grunau Baby II Monarch C Tandem Tutor catalog also includes other hardware non-scale kits Write Jim Ealy/Archaeopteryx Continued page 126 WL1 makers WPOPular PLUGDRIVER Fast & easy starting Lights J.glow plugs _______ adj twin plugs Bright plugs 12v battery sags 7voltsl No dropping resistors PHONE 203-333-1717 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW MASTER AIR~jJ3 IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 -~IASTEII AIRSCIUW PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO S FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 Avion Associates Box 120 Pottstown PA 19464 meantime support USA/F3B team Theres still time left Dan Pruss RR2 Box 49D Plainfleld IL 60544 RC Old-Timers/Mathews Continued page 49 comment perhaps pioneering four-stroke design wellmanufactured would have waited nearly forty years advent four-cycle massproduced model aircraft engines Oh yes thought terribly large hand ad picture mystery solved another opened photo ofthe 1935 Forster Little Hercules casting kits available Precision Service Co 10189 Crane Road Lindley NY 14858 opens up another mystery Art DeKaIb tells us engine debored destroked version earlier Apex seemingly no quite knows Apex engines relate later Forster 99 anyone can fill blanks story would like share readers Sandbagging 1938 Bill Effinger says Harold Carison 1938 Nationals won until very late day someone came along beat time says sandbagging til last possible moment SAM phenomena some folks think Pm prolific Ben Shere shaw must surely rank prolific model designers Old-Timer era quick check through John Pond catalog will find over dozen Shereshaw designs published and/or kitted between 1936 1939 Such familiar names Air Trails Sportster Cadet Cloud Cruiser Cumulus Eaglet Miss Exchange Club Nimbus Scientific Mercury Com modore featured Feb 81 issue magazine others products fertile mind Ben Shereshaw have always marveled man design ing publishing such profusion large models answer self-evident now have learned Ben taught high school Indus trial Arts time well being paid instructor Kresge Model Club days department stores promoted hobby departments sponsoring clubs Ben obviously designed models used available volunteer manpower around him construction crew way youngsters could benefit expertise turn able bang out great big Free Flights Although Shereshaws compensation magazine manufacturers minimal dollars must always relate what would buy As example recently have corresponding Bill Durand Omaha tells us placed Boeing 247 model ModelAirplane News 1934 received $5500 text drawings photos enough pay semesters tuition Omaha U have able pay fraction semesters tuition three college kids construction article though payment well excess $5500 As say its relative really Shereshaw designs marked beautiful flowing lines surfaces rarely used square surface flat section close study work reveals harmony line rarely matched designs contemporaries truly works art Shereshaw designs outstanding immediately indentifiable Super savings9 HL GLIDERS Fiberglass Materials EE 3 SATELLITE KITS FiberglassCloth5SqyarcisSlSO0E EU 17 OLD TIME GAS choice oz cloth LaminatingEpoxy Resin6hrcureS30Ocper galSend 25% for5 RUBBER 3 NORDIC LrquidMoldReleaseS3OO t6oZs1980 catalog9 COMPETITION GAS Epoxy Primer K&854000 per gal EpoxyPaintrhinnerK&RJSl5OopergalFUEL DT TIMERS -$1075 Polyester Resin K&B$20O0pet galF.A.I Model Supply Send check money order shippingcollect COO oka~ Call write Bob Smith RIC AircraftPO Box PO BOX 3957 TORRANCE CA 90510 Granada Hills CA 91344 213 3666872 LEISURE takes AIR DOUBLES flight time Odds ends several sources supply items relevant Old-Timer activities might prove helpful Trexler air-inflated balloon wheels Sig catalog available Hobby Horn find large 50cc plastic syringe veterinary supply great inflating Trexler also has bulb-type unit Y&O Yates Orwick wooden props available Hobby Horn Schmidt Custom Kits Some say finest props ever made use ignition motors Black neoprene tubing available Du Bro line must fuel system through diesel gasoline fuel will run commonly-available surgical vinyl tubing swell proportions pregnant earth worms used fossil fuels Diesel fuel contains kerosene hence fossil fuel Bakers AA castor oil Klotz Lubicin N-I synthetic lubes available pints quarts gallons Sig Amyl nitrate substitute Diesel Ignition Im prover available small quantities Henry Nelson 729 Valemont Dr Verona PA 15147 Dee B Mathews 506 South Walnut Greensburg KS 67054 writing advenmers mention reed about MA 126 Model Aviation SEND SASE FOR COMPLETE INFORMATION Now 8-10 mm electric power per flight LEISURE ELECTRONICS@ 11 Deerspring Irvine CA9271 40 714 552-4540