Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea
Edition: Model Aviation - 1986/05
Page Numbers: 60, 61, 62, 63, 160, 161, 162
Two HL Gliders STOMPER ROSCOE pair Outdoor HLGliders reflect two designers indi vidual concepts some similarities has pop-up wing positive dethermalizing John Lorbiecki Ross Jahnke Left While both HL Gliders share same dethermalizing DT hardware easy see two totally different designs Right first step wing construction both models mark critical dimensions pen felt-tipped marker Left Using sanding disk mounted radial arm sawifyou arefortunate enough haveone greatlysimplifleawing shaping sanding See text details Right Hobbypoxy brushed overthe entire model beneath DT mechanism very light strong finish Authors Jahnke L Lorbiecki R displaytheir respective models Roscoe Stomper Full-Size Plans Available. See Page 180 TARBLILUTDRD HIGH PONT WING WING MEDIUM BALSA FINISH 2 COATS HOBBY POET OUT-GLO ONANSE TIPS 1~ MOAM T VIEW GIG OR PLY FINGER -4 H-IS FIBRAG&ASS OR PLY WHOA 2 OF OLLE TO I5S WING MOUNT ONLY CREOTAM FUN OPTIONAL MUTtON OMEGA BOLT IF USES GOD 5 IN SGURRE OF 0-10 TO TOFGBOflSMGOTWING1 G1 BALSA WING MDEINT OS BOSHINGIIN BALOASNY II4ePINE INLAY ~7I Ao WIRE 051 STABILIZER LIGHT BALSA GIVE LIGHT LOUT OF LTRT-GLO ORAMOA BOTH SIRES RUDDER SUN RUDDER k MED -USRO RUDDER FUSELAGE SIDE VIEW ROE -cANAEONSNOrTEA 1-USE FUSELAME MDBAL5A /AiT PINE LAMINATED TO BOTTOM FUN STRENATO 51UAPER RL DESIGNED BE JOAN LORBIECRI DMA&INKEDOY ROSS IAHNEE 12 /00/RD Stomper Design John Lorbiecki SIMPLY PUT designed plane fly well windy turbulent weather normally fly larger model weather calm found need very stable adverse weather end product design sacrifices some gliding ability better altitude consistency An efficient dethermalizing DT sys tem using pop-up wing devised past have used swinging weights HL Gliders dont have enough fingers toes count ones have lost thermals stalled away merrily tried pop-up stabs inconsistent launches afso stabs tear off blast release snap Because DT construction fuselage perhaps weakest part Stomper must built 46 x spruce pine stiffener sides fuselage can either plywood prototype /64-in fiberglass G-lO latter material commonly used print ed-circuit boards very strong easily glued ordinary cements cy anoacrylate CyA fact entire glider assembled using Hot Stuff some other kind CyA glue have built models over longtime span entirely CyA May 1986 61 1 Len womper overall view shows DT band top wing turbulator strings help retard stalling aid recovery Right Stompers DT fuse snuffer tube Fuse recessed fuselage follow text InstructiOns protecting model Left Stomper DTd Angle should 450 Author finds method DTing reliable others such swing weight very effective means getting out biggest thermals Right see Stomper DT wing tension band finger rest Satellite City use Hot Stuff please get club ideas tech niques excellent time can save using will tremendous good transporting box helps reduce damage trim changesand adds bit class have highly satisfied resultsBy way have seen kind glue light strong fast videotape put out Bill Bob Hunter Construction wing has 18-in span 4-in chord two wings can produced sheet balsa usually build wings first finish can curing rest construction process Believe possible build accurate wing injust 10 minutes easiest accurate wayby sanding However dont sand normal way use radial arm saw sanding disc mounted accessory drive rotating head saw experimenting slightly angle proper high point trailing edge thick nesses can found balsa must sanded off steps once slowly working entire wing can sanded less 10 minutes fact have completely sanded 10 wings put dihedral less two hours disc use about 8 in diameter takes #100 sandpaper increasing angle disc leading edge portion wing can similarly shaped Note process can also 62 Model Aviation Left An overall view Roscoc Roscoes DTtuse positioned slightlydifferent Stompers lead weight used nose Full-Size Plans Available. See Page 180 TLICBLILOIRR 8100 poor WINO THOM LIGHT T FiNISH 2 COATS I4OS8IPOOY WITH DAY-OW 1IOs I0 FRONT VIEW TOP VIEWOT NOSE SHOWS STSEAMUNING FIJSELN3EPYlE STOP MOON LEAD ALIJO4 SEEISO WISE HOOKS STOSILIZER FROM LIGHTIF SI-lENT 301010 SEJOIlT AIRFOIl EXCEPT ONTOG CENTER LINE OIHETIC II IS ATTOCIIED TO FLISCIJOE ONE ONE COAT CLEAR hUSSY POXY & TYPICAL CROSS SECTION APT OF ICING ON TL 8004105 i* SELOGE 44 BALSAPINE DIA 50cr tOES010K TINO COATS HORSY POET EXCEPT UPNER WING MOONT I/GOOR PEsoosO 2 041 0510 MOUNT ONLY S used wings having elliptical outlines After shaping process has com pleted other sanding needed round leading edge smooth complete wing #220 paper radial arm saw also provides easiest way cut dihedral angles carefully setting head half dihedral angle required using saw blade intended plywood accurate joint can made requires no sanding Just cut glue thick CyA lightly sand its done like completely finish wing before going other construction steps have used dope lacquer MonoKote extensive ly years including second place Nats epoxy have found Hobbypoxy best because its light weight strength resistance crack ingand grasshoppers dont like imperative Day-Gb orange applied tips visibility After two coats epoxy have cured turbulators glued place thick CyA Remember use CyA everything Use Magic Marker name AMA numbers Set com pleted wing aside no special tricks stab rudder Round leading edge taper last Ys trailing edges allow suffaces bent trim adjustments Put coat epoxy put aside Select straight A-grained piece balsa fuselage Please note use balsa spruce have pictures Continued page 160 Left OTd view Roscoe shows plywood sidesthat used alignment Right Again wing tension band time Roscoe Trythis DT method mayseem difficult others moreaptto keepyour best H LG flying away big thermal May1986 63 WING NOTE 4 OTT RUDDER FROM io SHEET PRINT DINYOLO ORANGE RUDDER ROSCOE 18 HLG DESIGNED ST ROSS JAHORE ORAIOIN& INKED BY ROSS JAHNKE /1/55 Ly APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded lIsts end curves Handy Held Easy Use $235 MINI-STRIPS PRECISION DIE-CUT Medwm Garnet SAVES TIMEREPLACEMENTFine Garnet AND EFFORT $155SANDING BELTSAssId Water Praul TEE ALUMINUM EXTRUSION SANDING eLOCK let use 1111 CUFF-STUFF Self-adhesive sand paper Large Tree Surtace WeeIWesrOut lllechS250 Handy Iv Use 22 Inch $3 65 RUFF && STUFF SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy te Use mesay give er drying Urns Media Flee r Flee $99 M N & SAW COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw has nagged div-cast frame cemlertable chip-preet plastic lit sert handle Receding sue ad jastable B blade gives gad marIa access Cats weed pivatic metal HARDENED MUSIC WIRE extra htsdes-3/S1 99 RC Electrics/Kopski Continued page 157 pears behind pointer itself image disappears know youre look ing pointer scale markings directly line Thats end another column folks hesitate say what well cover nextthe Electric activity too dynamic what ever Ill best keep commin Please appreciate fact columns necessity limited length Per haps not-too-distant future Electric will grow sufficient size have its own magazine Till next time. Please forward comment query SASE please Bob Kopski 25 West End Dr Lansdale PA 19446 careful NOT hit switch holding Electric lapI RC Pylon Racing/Hager Continued page 54 25 competitive OS 25 FSRs fact first three places two combined contests held late fall 1984 taken non-Schnurle engines encouragement decided try set up another two-club racing circuit 1985 have seven races month far year hope get two November Decem ber weather permitting have 19 dif ferent people have participated least race 12 17 showing up races also have about halfdozen appear ready get volved So looks like may finally have gotten something started could lead some real Pylon Racing ac tivity area should noted Q-25 air craft real blast fly standard Quarter Midget short course 9000 ft Winning times usually 130 range means aircraft average about 60 65 mph over course course doesnt consider fact aircraft fly longer path suspect planes fly ing 80 85 mph down straight aways Unlike Quickee 500 aircraft RC pilots can handle aircraft like fast enough make interesting racing quiet enough have no concern over complaints about noise aerobatic enough make great sport aircraft weekend flying Im really convinced apparently-successful beginning will lead sophisticated forms racing ie Q-500 Quarter Midget mula area Most guys currently flying Q-25 contests enjoy what have dont believe faster speeds necessary have fun fact some suggesting should tight en up rules next year try slow things down As competi tive events some guys starting modify engines run very-high-nitro fuel goes remains seen trying get some other clubs area interested racing us problem almost clubs area relatively small 20 30 mem bers widely scattered 60- 80-mile trip through mountains lousy WV highways isnt fun will try keep apprised things progress ing future letter somewhat typical several hundred have seen over past few years take See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 Auction/Suding Continued page 59 program makes few assumptions may appropriate auc tion First maximum 79 sellers maximum 25 items allowed dimension statement Line 20 program normally well under maximums except few enthusiasts bunch small grab bags goodies cover assign second upper dummy number utilize item count nears 25 settlement time Ijust add real dummy assign ment amounts computer memory used dimension state ment could increased avoid difficulty different table system could used system could modified off-load periodically disk avoid risk power failure Another improvement might inclusion aTab systemwhereby sellers could charge bids against projected earnings HLG/Lorbiecki-Jahnke Continued page 63 taken during launch thick balsa fuselage bending does launch point nearly unbelievable bending can up 3/4 springy spruce fuselage cant help make launch inconsistent Select straight piece pine spruce support CyA-glue place important accurately cut small support piece fuselage cutout Glue two together Mark wing location ball-point pen also mark stab rudder areas Carve sand fuselage shape taking special care around stab rudder wing mounting 160Model Aviation [DCO SKY D[VI[ 65 Igntrton Approcd e 90 Day Warrafitv Twin Ball Bearing Crank Americas finest oldtimer engine Originally designed Hassad & Halik replica engine resonic tuning ensures continuous flow power through speed range Look out green one2 goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug alit icsrdcnts add 6% sales tax ORDER DIRECT T&D RESEARCH AssoclAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 SI FOR BROCHURE Add 20% postage Send 25a casalog areas keep straight Cutout piece aluminum tubing DT fuse snuffer tube Note flange left tube protect fuselage smoldering fuse Notch nose install unit shown Five-minute epoxy can used dont trust thick CyA Make wing mounts pians show sand fuselage wing will easily pivot pop-up DT Mount stabilizer rudder Put rudder straight possible stab should put some left stab tilt left side high viewed rear approximately /16 required Give fuselage assembly coat epoxy has cured wing pivot point can mounted hooks can added Fit wing assembly put pivot screws try DT couple times See wing pivots freely DT action reliable Flying Make first few flights area tall grass Test-glide model looking slight left circle doesnt glide left look crooked rudder thats usually cause Trim model slightly tail-heavy launch slightly right wind nose quite high should medium-power launch loops turns hard right problem usually too much negative incidence stab up elevator model goes over top put up-elevator use rudder stab trim power portion flight clay lead wing twist washin washout control glide arm strong will find down-elevator needed control launch arm isnt strong possibility up-elevator will required up-elevator model will tend roll way up recover easily glide Always use DT gliders have lost light toss erroneous thought Theres no lift today mes sage light DT fuse time thats left pick good lift win big Roscoe 18 Design Ross Jalinke THIS DESIGN came about several reasons First foremost desire create model well-suited pop-up wing dethermalizer DT concept John Lorbiecki working Second prefer fly own designs early HL Glider flying Blanchards Polly satisfied size model wasnt altogether happy its appearance have very comfortable building flying resulting Roscoe 18 Construction model well doc umented plans will explain much reasoning behind design instead providing step-by-step building instructions fuselage complex part model much thought has given streamlining efficiency Fron tal area has kept minimum recessing DT fuse keeping hinge bolt small making nose rather sharp strengthen fuselage fiberglass built nose G-1O printedcircuit-board material very strong rigid being surprisingly easy sand can adhered epoxy CyA added strength strip 6 x -in pine laminated bottom fuselage chosen over use hardwood fuselage two reasons First hardwood fuselages heavy Second seemingly popular spruce fuselage too flexible tends flutter during launch Result very inconsistent launches balsa fuselage very rigid compared spruce added pine strip pro vides extra strength necessary stand hard landing Epoxy glue paint add final touch fuselage Epoxy fillets placed around wing finger grip front snuffer tube rest model painted two coats Hobbypoxy dont paint section fuselage under wing mount assure smooth working DT wing constructed conven tional manner Wood selection however very important wing largest component model making critioal determining models final weight Perhaps noticed center wing panels joined very little dihedral Reason wings lift generated center section excessive di hedral would lose some Most dihedral tip panels no loss stability has noticed very windy conditions leading edge turbulator added minimize drag through changes ve locity model experiences during transition power launch glide study done Germany several years ago indicated low Reynolds numbers high-performance airfoils drastic increase induced drag medium-range velocities such HL Glider experiences addition turbu lators various points near leading edge reduces drag Although simple airfoils used HL Gliders tested seems follow might aided same way Wood selection also very critical tail surfaces lighterthe tail less lead weight will required model balance properly Also weight reasons tail given coat Hobby poxy model should fly right off May1986 161 U OPS 80 Fan En Needle Bearing Rod New OPS 80 warmed over 65 has needle bearing rod new 80 case larger by-pass exhaust area slide valve carb fits old 65 mounts OPS 80 produces 455 HP 21000 RPM Order today local hobby shop SiartsPeoof Comfte4io Tmko4t4 %ec PO Box 26247 e New Orleans LA 70186 e 504 242-5967 Step-By-Step Instructions lete Rolled Plans rate Machine Die Cut Balsa Spruce Plywood ce Spars Launch Strength THE HAND LAUNCH E HI-START H 59 Span 15 Oz 2 channel 370 Sq Area computer Modified E-193 Airfoil I DAVEY Him ONE WOOD LANE MALVERN PA 19355 215 644-6772 board built according plans adjustment apt need except some fine-tuning set center gravity CG smooth glide adjust ments keep mind warps wing tail surfaces have effect model under power CG location stab tilt important glide Rudder adjustments particularly sen sitive during launch recom mended amount stab tilt wing askew shown plans model should have good glide circle Little rudder adjustment should needed some models have found bit washin left wing helps both power glide phases little nega tive incidence stab aids recovery bad launchesbut wont let model get higb would otherwise avoid using negative stab possible hope enjoy model complex DT puts off build model friend learned fly HL Gliders Roscoe having swinging-weight DT still flying same model after year have questions comments please write Ross Jalmke W65 N727 St John Ave Cedarburg WI 53012 responding advertisers mention read about Model Aviation FF Old-Timers/Haught Continued page 65 events Power Scale Rubber Scale Tex aco Towline Glider Post 42 events Old Ruler Replica 020 Power Half-Scale Old-Timer Compressed Air Twin Rubber Power events broken down Cabin Pylon models cabin models first scene made resemble full-size lightplanes Cabin models recognized virtue having windows appropriate loca tions may sound like oversimpli fication some models have neither windows nor pylon thus brought about lengthy discussions ap propriate class competition purposes Hence rule thumb doesnt have windows must fly Pylon class Basically Pylon model has wing mounted above fuselage pylon structure confused struts utilized categorize model parasol modelbut must still fly Pylon class Pylons developed enable higher-powered engines used thus enhancing climb performance resulting hoped attain ing higher altitudes allowable engine run thus longer gliding time pylon effectively adds vertical stabilizing area forward improves directional control during climb Complicated may seem tnp Old-Timer contest will help sort out various types competitions may seem endless limit sorts Old-Timer modeling activity limited preexisting designs some may feel stifles creativity Well thats almost case founders SAM pro vided option creativity special event Old-Ruler category allows original designs conforming 1941 AMA rules ie minimum cross-sec tional area length squared divided 100 wing loading eight ounces per square foot power loading 80 ounces per cubic inch engine displace ment However years Old-Timer activity dont think Ive seen three such models Another area allowingand encouragingcreativity special event compressed-air engines Any model may used long powered Twenties-type compressed-air engine no CO-2 motors allowed utilizing max imum air pressure exceed 150 pounds per square inch motors usually homemade available plans soldered up brass tubing what have John Ponds brother Bert authority engines As can see nearly something I[ WANNA RACE JnnTLAC ACT AREAELSL BEGINNER RACES r 0-500 * FORM-i j Instructions ~CIub Programs Informatioll Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 617 528-4043 203 673 -2000 162 Model Aviation L SIZE E PERFORMANCE HARRYS WHEEL COLLAR WRENCH hardened POt 1/8 AXLES 5132 AXLES LARGER AXLES 279 EACH HARRY R HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 CHAMPION FF KITS Wake-Up Wakefield Champion Coupe Upshot Mulvihill CHAMPION RUBBER 3/32 1/8 3/16 & 114 widths 042 thick $1195/lb box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 carmen ct La Verne CA 91750 714 599-3348 Includes US delivery via UPS es add 0% tea