K-W RALLY weekend following Labor Day Kitchener-Waterloo Scale Rally gathering place Scale modelers east ern parts Canada US usual quan tity 155 Scale models appeared spite expected rainy weather Flights held up about two hours Saturday afternoon re sumed immediately after showers ceased Flying Dutchmen Club again used system avoiding radio interference Six steel posts driven ground list frequencies attached detachable colored triangle top modeler ready fly parks airplane post bearing frequency trades triangle transmitter impound system works 100% no problems though six lines operation Club-member moni tors make certain good separation tween transmitters flight line Also 31M adjacent-channel interferences nonexist ent dont always see large number new air planes K-W Rally enough make 1200-mile round trip worth reality social aspects K-W sufficient attraction gather lot modelers park ing lot campground adjacent flying field already near-full Friday evening Saturday its jammed motor homes tents vans Groups congregate evening after flights finished converse share experiences invited steak dinner STARS Club Olean NY Flying Dutchmen pro vided evening entertainment large-screen movie Top Gun corn roast late evening several hours after sunset total darkness running engine signals everyone gather flying field Steve Gray demonstrated night flight complete lowlevel aerobatics flying lighted nine-footspan model appeared combination Cub Telemaster Steve uses heads three cheap flash lights illumination novel arrangement Two mounted inside cabin windows projecting beams along lower surfaces wings third bulb reflector aimed rearward through fuselage interior bright illumination radiating means models plastic covering combination light ing Steve capable flights equal daylight Power supply three bulbs extra 48-volt flight pack battery servocontrolled on-off total darkness model very bright Although Canada Quadra country fourstroke invasion has really taken hold also Two very impressive aircraft A-scale CAP 10 Laser models powered Saito 270 twin-cylinder engines Laser using igni tion ultraslow idle complete reliability Both models very aerobatic especially vertical maneuvers Jack Swifts clipped-wing Monocoupe 110 -scale used British Laser 90 four-stroke en gine 125 lb weight airplane very aerobatic capable precision maneu vers equally impressed Paul Weigands new clipped-wing Tayloreraft 225-scale 12 lb 05 120 four-stroke per mitted truly uniimited Aerobatics aerobatic models flown skill preci sion throughout routines STARS Club Olean NY star show both days Six A-scale Bristol Scout biplanes flown loose formation probably last time such quantity models now quite old Quadra Charles Calverts -scale 1911 Avro D spans 87 weighs 15 lb Wings spruce structure Super Coverite Handmade wire wheels have tires -in surgical tubing dummy engine took 140 hours complete partially disguises models OS 120 cu four-stroke Radiator assembled small-diameter tubing Did people ever really fly things like Would today scale details Bobs new Douglas Maliplane Wing walks L look realare made crushed walnut shells model railroad track bal lastl painted inlaid Hobbypoxy Stuff near trailing edge represent wear muddy residue Cockpit cowl panels R held place same prototype drilled pins removable wire hold-down rods Yes theyre functional model 46 Model Aviation Rado Conoi Scale Bob Dolly Wischer 35 powered nearly identical appear ance None pilots dared shift gaze model another few sec onds risk losing identity last years K-W Rally STARS member Bob Dunn displayed new A-scale Curtiss A-i Triad 1911 floatplane first US Naval aircraft year flown numer out occasions using attached wheels flies very well spite extremely thin wings near-scale airfoil section Bob says main float beneath model has insufficient displace ment support model water wonders whether prototype similar difficulties Ordinarily no prizes judging K-W This year award given pilots choice genuine handcrafted Dolly teddy bear Winner Bob Dunn spectacular Triad flights wonder ultimately gets bear Bob has 13 children 13 grandchildren Details Axiom Scale modelers Dont vent just copy cockpit cowl full-size Douglas Mailpiane held place a manner lends itself easy maintenance disas sembly held down long steel wires pass through rows projecting steel pins After observing feature prototype Na tional Museum easy decision copy reduced size model would offer same accessibility internal cockpit details well control mechanisms pins made 062-in-dia brass rod cut length about 25 cross-drilled 025 music wire drill press vise holding pin securely will job hole started No 1 center drill finished No 70 028 drill aluminum cowl prepared next holes drilled along lower edges rather loose fit pins using No 50 070 drillor about size Holes fuselage structure made fit pins closely using aluminum cowl spot exact locations drilling through wood 062-in drill reasonably tight fit pins inserted holes length 025 music wire passed through cross-holes alignment CyA ap Continued page 143 Designed Ken Willard eamaiter 45 Flies off both land water Crisply die-cut balsa lite ply parts complete hardware easy sembly sensible engineering clear plans photo illustrated assembly manual PRECISION Hawker Hurricane MI lic $14950 Wing Span 62 inch Weight 61/2 81/2 lbs Idepends flaps retractsl Full Scale Detail includes S view flaps retracts setup Engine 65-90 FS 60 TS Fiberglass cowl Aero-Pacer $8900 Sport-Trainer Wing Span 641/2 inch Weight 5-7 Ibs Wing load 19-25 oz Engine 45-65 FS 29-45 TS Easily converted tail dragger flaps Video construction tape available Baby-Pacer $5950 Versatile small size Wing Span 50 inch Weight 25-35 Ibs Wing load 19-25 oz tngine 15-40 FS 19-25 TS ELECTRIC HANDCUT SELECTED BALSA AND HARDWOOD PARTS . ALL WITH MADE IN USA QLJALITY DH6O Gipsy Moth $10900 Wing Span 541/4 inch Weight 5-6 Lb Wing Load 15 oz Engine 45-65 FS 35-50 IS Flybaby 2 1 Combo Flybaby $7950 Bipe $9500 Combo $11000 Wing Span 56 44 inches Weight 4-5 Ibs Wing Load 22 14 oz Engine 30-45 ES 25-40 TS AT FIELD CONVERSION 10 MIN Q * AERODROME MODELS LTD MODELS LTD 2623 S MILLER RD SAGINAW Ml 48603 517 781-3000 January 1988 47 STARS club members assemble part show program K-W Rally Six Bristol Scouts Quadra-powered flown together impressively few 155 Scale models attendance 18th annual Kitchener-Waterloo Scale Rally What makes meet popular Fly ing Dutchmen Club policy no judges no prizes no registration fee Complete Catalog $200 ordered direct add W 19th St PO Box 511 E7 Higginsville MO 6 ~'P64037 cail 816584-7121 VISA Mastercard COD money order Add $550 Post Handling Mkh residents add 4% Video Catalog $1000 Beta VHS $5 rebate order Cowls either ABS Fiberglass Plan Packs Available RC Scale/Wischers Continued page 47 plied hole inside fuselage Cement wicked down through hole sur rounded pin freeze position perma nently holes filled appearance used Hobbypoxys Stuff mula arrangement has survived flights music wires havent moved ex cept extracted intentionally servicing models interior September 87 column described method making simulated piano hinges rashly stated whenever see piano hinge can assumed hinge straight line operation letter Hank Farrar informs us least aircraft used piano hinge curved assumption oper ated hinge pin would straighten itself warping aluminum cowl material Strange shapes generated sheet aluminum cowl compound curves meet unyielding piano hinge Oshkosh year searched exam ple curved piano hinge course found cowl fastener Rangerpowered Fairchild 24 appeared dis tance piano hinge curved surface closer examination proved long remov able wire passing through hinge-type segments much same previously described cowl fastening system further checking find some aircraft did use curved piano hinge wire passing through segments removed opening cowl means obviously wasnt really hinge details aircraft have wing walks access passengers cockpit walks rough good traction shoe soles Scale models common method simula tion piece sandpaper emery cloth proper grit size glued place However fin ished product looks just like piece sandpaper may need several strips glued between strengthening ribs have simulated rough wing walk mask ing out walk area coating glue spreading model railroad track ballast wet glue Shake off excess dry paint suit What wonder material Gran ulated walnut shells adheres well can painted case gray dope mixed small amount aluminum powder Tail-dragger problems Ground-loop tendencies tail wheel tail-skid models well known Among fly tail-draggers two kinds pilotsthose have ground-looped will problem arises because wheels being forward models center-of-gravity Once CG begins swing side tends accelerate direction because rolling resistance wheels Prop blast over rud der takeoff can help minimize swing also helps quick rudder control counteract unwanted yaw Keeping tail wheel firm contact runway means Up-elevator control can also help easily overdone model may leave ground three-point position near-stalled attitude Up-elevator should used until rudder control becomes posi tive comes prop blast combined forward motion easing up elevator speed builds Landings somewhat different situation. Prop blast idling engine ineffective models speed provides rudder con trol usually possible get model firmiy runway before ground-loop develops during slowing-up process model tries get away straight heading three-point landing tail wheel firmly planted earth can help keep model straight Tail wheel contact earth has greater effect rudder slowly moving air Often overlooked swiveling tail wheel effect caster angle pivot bottom end pivot must aft top end mea sured three wheels resting hor izontal surface tail wheel tends center itself rearward along airplanes center line moving forward direction have seen Scale models oppo site condition existed tail wheel con stantly trying turn side other model rest dragging rudder along Preferably pivot axis should slop ing bottom pivot slightly aft top vertical would provide neu tral castering operation weight tail wheel will keep wheel centered behind model Swiveling wheel will now cause tail rise weight wheel has re sultant force center wheel behind model Length lever between pivot tail wheel center unaffectedthat can short long Wheel alignment main landing gear also affects tail-draggers propensity groundloop As turn begins load increases wheel outside left turn right wheel heavily loaded Frictional drag wheel increased would tend retard swing model back straight path Wheels toe slightly acceptable would increase drag outside wheel Toe-in measured shorter distance between left right tire centerlines front com pared rear Toe-out opposite condition results less drag outside wheel therefore helps promote ground-loop best tracking runway prefer main gear wheels aim straight ahead few degrees toe-in auto toe-in angle ordinarily about 12 degrees wheel other condition main gear wheels tires very detrimental ground directional sta bility resiliency tire material think soft tires being desirable shock absorbency can contribute groundlooping disposition well have first hand recent experience condition tires too soft will deflect roll over until wheel rim strikes runway know happens because rim edges eroded contact rough runways occurs outside rim large chunks missing along periphery As tire rolls off rim inward outside wing tip lowers toward runway until begins drag classic description ground-loop theory drag outside wing tip shoul4 slow tip correct turn back straight path actuality model swings past straight line overshoots groundloop other directionand away goes scuffing first other its wing tips Nothing could deflate pilots ego display whirls down runway appreciative audience watching obvious remedy use wheels having tires material greater stiffness Use land ing gear shock absorbers rather tires January 1988 143 Bj Co Il 0 Ji x 0 x N G CD CD 1 I m 0 z 0 z z 0 -u 0 -a m I m 0 0 C, -I CD Co 0 0 0 C 0 Co 0 CO CJ1 rh 0 ease models contact runway ware soft tires tail-dragger model Scale modelers have little choice wheel placement either tread width fore aft direction since copying prototype Some Scale models have main wheels quite far aft means CG can close wheel centers especially tail-high landing CG near wheels ground-loop tendency reduced P-S 1 Mustang real problem arrangement possibility tail may too high land ing time CG now almost directly above wheel centers nose-over results Except nasty inclination main gear lo cation P-S 1 very close ideal model ing purposes best tail-draggers ground handling choosing model subject main gear lo Hoitw Horn Old Timer -i1k LRRZOs t sos cIUtodtL RD BREAKER 1941 BROOKLYN DODGER 56 cabin EWE5T* Retail 552g5INTRoDucToRY PRICE*53900 1938 Record Breaker 96 $6956 tS3SZipper 54$5336 1938 Kloud King 63 $42 36 1991 Brigidier 56 $4076 1941 5uper Qoaker 78 $72 76 1948 50 Long 50$3836 1936 Buccaneer 84 $5990 1938 Clipper MKI 72s4156 1937 DalIa/re 188 $75 16 1935 Miss America 84 $7196 1901 Playboy Sr 80 $5116 1991 Playboy Jr 54 $3116 1938 Powerhoose 89 $53 S6 1908 Sailplane 78 $8476 1938 Trenton Terror 72 $4876 1948 Ranger 06$3196 1939 Korda Wake 44 $1916 1939 Mercury 72 $5836 kits qualify 5AM events EF & N/C feature highest quality machine cut & sanded parts Superior alt Competition sheet sod strip wood wire 5 window material PtaOs orig FF hot models ore easily convertible 3ch /C KIT5 Sailpianes Electric power Gas Hobby Horn SENSOAR Glider 78 $1888 Midway Model GNOME R/G Hand Launch Glider$29t8 Jolly Models FLINGER R/G HLG 58 Span $24tt Midway Model FAST EDDIE Aerobatic /05 Elec$19tO Jolly Models ELECTRIGUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3008 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure RASP 37 Direct 05 Electrics $2258 Midway ULTRA MK IV 86 Geared 84 EP $3900 Midway FLYING QUAKER 84 40-454 stroke $6476 Oks/Midway DENNY JR 72 Alum Cowel $6396 p*OOO 005A00U01 i 72 051 05 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail SHIPPING & HANDLING 64 Page CATALOOUE Up $880 add $130 $208 PP/tot Gloss $881 $2000 add $225A copy witl sent $2001 $9508 add $388 free--when requested $4581 $7008 add $358 order over $7000 add $400 HOBBY HORN CA Addressees add 05 tao 15173 Moran St [At Send MO \/isa/MC#-rEmp o Bow 2212 Check allow up 30 Westminster Ca 92684 days CR clearance 714 8938311 COD Esact Charges plus $158 Hdl Cash Only [AftHcs 714 8951203] cation could deciding factors eliminates prototype consideration Wheels far forward CG can spell trouble Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI S30J8 RC Soaring/Blakeslee Continued page 49 must also thank Jack COGG offer ing host international Duration event clubs Dash Cash cross-country race FAI-sanctioned F3H event 87 COGG knows handle international contest think will international Duration event not-too-distant future first need workable rules four five coun tries interested having go also need careful international Duration efforts dilute F3B programs F3B what exists international Sailplane competition must make sure F3B gets maximum support International Duration would specialty event RC Soaringmuch F3H CrossCountry Racing now would fill void fliers Durating dont like building planes Speed Distance tasks Which leads us next bit Whats ultimate Thermal ship Much interest international Duration contest would center what kind Sailplane would turn Out ultimate F3B Speed Distance tasks plus winch war have forced designers pretty tight box de signing Duration mind parame ters would seem opened up considerably Three general categories design can envi sioned 1 The traditional rudder/elevator polyhe dral floater Well perhaps floater apt term since talking about Windrifter polyhedral ship can move out requiredsomething like Larry Jollys 128-in-span Meteor its Eppler 205 airfoil larger polyhedral ships have de veloped Britain Open Class competi tions run 130 160 in span typically have good moving airfoil like Ep pIer 193 Dry wing loadings about mne ounces per square foot low teens Printed below letter Bernard Henwood leading designers breed Duration Sailplane Youll read what Bernard favors about big polyhedral ships 2 The modern straight-wing Thermal com petition design typified Bob Dodgsons 144 Model Aviation 124-in-span Windoong Bob has long maintained considerable justification going re sults recent Nats Windsong better all-around Duration ship because can ride out light stuff no-lift days can still cope windy conditions owing its camber-changing wing Eppler 214 airfoil good professor designed 214 specifi cally all-around Duration flying 111% thick its normal configuration has quite bit undercamber rear half tricky part designed camberchanging Raising flaps ailerons 60 takes Out undercamber produces go fast wing section fast F3B league faster what used thermal compe titions landings flaps go down 90 ai lerons go up about 30 so-called INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN o Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions o Made USA AMA modeler oFits Tx-Sturdy construct oPolyester filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastSure fit oChoose Red Blue Brt Orange AMA patch included yours well sew free NO POSTAL HANDLING FEE send patch color choice SKY-HI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861
Edition: Model Aviation - 1988/01
Page Numbers: 46, 47, 143, 144
K-W RALLY weekend following Labor Day Kitchener-Waterloo Scale Rally gathering place Scale modelers east ern parts Canada US usual quan tity 155 Scale models appeared spite expected rainy weather Flights held up about two hours Saturday afternoon re sumed immediately after showers ceased Flying Dutchmen Club again used system avoiding radio interference Six steel posts driven ground list frequencies attached detachable colored triangle top modeler ready fly parks airplane post bearing frequency trades triangle transmitter impound system works 100% no problems though six lines operation Club-member moni tors make certain good separation tween transmitters flight line Also 31M adjacent-channel interferences nonexist ent dont always see large number new air planes K-W Rally enough make 1200-mile round trip worth reality social aspects K-W sufficient attraction gather lot modelers park ing lot campground adjacent flying field already near-full Friday evening Saturday its jammed motor homes tents vans Groups congregate evening after flights finished converse share experiences invited steak dinner STARS Club Olean NY Flying Dutchmen pro vided evening entertainment large-screen movie Top Gun corn roast late evening several hours after sunset total darkness running engine signals everyone gather flying field Steve Gray demonstrated night flight complete lowlevel aerobatics flying lighted nine-footspan model appeared combination Cub Telemaster Steve uses heads three cheap flash lights illumination novel arrangement Two mounted inside cabin windows projecting beams along lower surfaces wings third bulb reflector aimed rearward through fuselage interior bright illumination radiating means models plastic covering combination light ing Steve capable flights equal daylight Power supply three bulbs extra 48-volt flight pack battery servocontrolled on-off total darkness model very bright Although Canada Quadra country fourstroke invasion has really taken hold also Two very impressive aircraft A-scale CAP 10 Laser models powered Saito 270 twin-cylinder engines Laser using igni tion ultraslow idle complete reliability Both models very aerobatic especially vertical maneuvers Jack Swifts clipped-wing Monocoupe 110 -scale used British Laser 90 four-stroke en gine 125 lb weight airplane very aerobatic capable precision maneu vers equally impressed Paul Weigands new clipped-wing Tayloreraft 225-scale 12 lb 05 120 four-stroke per mitted truly uniimited Aerobatics aerobatic models flown skill preci sion throughout routines STARS Club Olean NY star show both days Six A-scale Bristol Scout biplanes flown loose formation probably last time such quantity models now quite old Quadra Charles Calverts -scale 1911 Avro D spans 87 weighs 15 lb Wings spruce structure Super Coverite Handmade wire wheels have tires -in surgical tubing dummy engine took 140 hours complete partially disguises models OS 120 cu four-stroke Radiator assembled small-diameter tubing Did people ever really fly things like Would today scale details Bobs new Douglas Maliplane Wing walks L look realare made crushed walnut shells model railroad track bal lastl painted inlaid Hobbypoxy Stuff near trailing edge represent wear muddy residue Cockpit cowl panels R held place same prototype drilled pins removable wire hold-down rods Yes theyre functional model 46 Model Aviation Rado Conoi Scale Bob Dolly Wischer 35 powered nearly identical appear ance None pilots dared shift gaze model another few sec onds risk losing identity last years K-W Rally STARS member Bob Dunn displayed new A-scale Curtiss A-i Triad 1911 floatplane first US Naval aircraft year flown numer out occasions using attached wheels flies very well spite extremely thin wings near-scale airfoil section Bob says main float beneath model has insufficient displace ment support model water wonders whether prototype similar difficulties Ordinarily no prizes judging K-W This year award given pilots choice genuine handcrafted Dolly teddy bear Winner Bob Dunn spectacular Triad flights wonder ultimately gets bear Bob has 13 children 13 grandchildren Details Axiom Scale modelers Dont vent just copy cockpit cowl full-size Douglas Mailpiane held place a manner lends itself easy maintenance disas sembly held down long steel wires pass through rows projecting steel pins After observing feature prototype Na tional Museum easy decision copy reduced size model would offer same accessibility internal cockpit details well control mechanisms pins made 062-in-dia brass rod cut length about 25 cross-drilled 025 music wire drill press vise holding pin securely will job hole started No 1 center drill finished No 70 028 drill aluminum cowl prepared next holes drilled along lower edges rather loose fit pins using No 50 070 drillor about size Holes fuselage structure made fit pins closely using aluminum cowl spot exact locations drilling through wood 062-in drill reasonably tight fit pins inserted holes length 025 music wire passed through cross-holes alignment CyA ap Continued page 143 Designed Ken Willard eamaiter 45 Flies off both land water Crisply die-cut balsa lite ply parts complete hardware easy sembly sensible engineering clear plans photo illustrated assembly manual PRECISION Hawker Hurricane MI lic $14950 Wing Span 62 inch Weight 61/2 81/2 lbs Idepends flaps retractsl Full Scale Detail includes S view flaps retracts setup Engine 65-90 FS 60 TS Fiberglass cowl Aero-Pacer $8900 Sport-Trainer Wing Span 641/2 inch Weight 5-7 Ibs Wing load 19-25 oz Engine 45-65 FS 29-45 TS Easily converted tail dragger flaps Video construction tape available Baby-Pacer $5950 Versatile small size Wing Span 50 inch Weight 25-35 Ibs Wing load 19-25 oz tngine 15-40 FS 19-25 TS ELECTRIC HANDCUT SELECTED BALSA AND HARDWOOD PARTS . ALL WITH MADE IN USA QLJALITY DH6O Gipsy Moth $10900 Wing Span 541/4 inch Weight 5-6 Lb Wing Load 15 oz Engine 45-65 FS 35-50 IS Flybaby 2 1 Combo Flybaby $7950 Bipe $9500 Combo $11000 Wing Span 56 44 inches Weight 4-5 Ibs Wing Load 22 14 oz Engine 30-45 ES 25-40 TS AT FIELD CONVERSION 10 MIN Q * AERODROME MODELS LTD MODELS LTD 2623 S MILLER RD SAGINAW Ml 48603 517 781-3000 January 1988 47 STARS club members assemble part show program K-W Rally Six Bristol Scouts Quadra-powered flown together impressively few 155 Scale models attendance 18th annual Kitchener-Waterloo Scale Rally What makes meet popular Fly ing Dutchmen Club policy no judges no prizes no registration fee Complete Catalog $200 ordered direct add W 19th St PO Box 511 E7 Higginsville MO 6 ~'P64037 cail 816584-7121 VISA Mastercard COD money order Add $550 Post Handling Mkh residents add 4% Video Catalog $1000 Beta VHS $5 rebate order Cowls either ABS Fiberglass Plan Packs Available RC Scale/Wischers Continued page 47 plied hole inside fuselage Cement wicked down through hole sur rounded pin freeze position perma nently holes filled appearance used Hobbypoxys Stuff mula arrangement has survived flights music wires havent moved ex cept extracted intentionally servicing models interior September 87 column described method making simulated piano hinges rashly stated whenever see piano hinge can assumed hinge straight line operation letter Hank Farrar informs us least aircraft used piano hinge curved assumption oper ated hinge pin would straighten itself warping aluminum cowl material Strange shapes generated sheet aluminum cowl compound curves meet unyielding piano hinge Oshkosh year searched exam ple curved piano hinge course found cowl fastener Rangerpowered Fairchild 24 appeared dis tance piano hinge curved surface closer examination proved long remov able wire passing through hinge-type segments much same previously described cowl fastening system further checking find some aircraft did use curved piano hinge wire passing through segments removed opening cowl means obviously wasnt really hinge details aircraft have wing walks access passengers cockpit walks rough good traction shoe soles Scale models common method simula tion piece sandpaper emery cloth proper grit size glued place However fin ished product looks just like piece sandpaper may need several strips glued between strengthening ribs have simulated rough wing walk mask ing out walk area coating glue spreading model railroad track ballast wet glue Shake off excess dry paint suit What wonder material Gran ulated walnut shells adheres well can painted case gray dope mixed small amount aluminum powder Tail-dragger problems Ground-loop tendencies tail wheel tail-skid models well known Among fly tail-draggers two kinds pilotsthose have ground-looped will problem arises because wheels being forward models center-of-gravity Once CG begins swing side tends accelerate direction because rolling resistance wheels Prop blast over rud der takeoff can help minimize swing also helps quick rudder control counteract unwanted yaw Keeping tail wheel firm contact runway means Up-elevator control can also help easily overdone model may leave ground three-point position near-stalled attitude Up-elevator should used until rudder control becomes posi tive comes prop blast combined forward motion easing up elevator speed builds Landings somewhat different situation. Prop blast idling engine ineffective models speed provides rudder con trol usually possible get model firmiy runway before ground-loop develops during slowing-up process model tries get away straight heading three-point landing tail wheel firmly planted earth can help keep model straight Tail wheel contact earth has greater effect rudder slowly moving air Often overlooked swiveling tail wheel effect caster angle pivot bottom end pivot must aft top end mea sured three wheels resting hor izontal surface tail wheel tends center itself rearward along airplanes center line moving forward direction have seen Scale models oppo site condition existed tail wheel con stantly trying turn side other model rest dragging rudder along Preferably pivot axis should slop ing bottom pivot slightly aft top vertical would provide neu tral castering operation weight tail wheel will keep wheel centered behind model Swiveling wheel will now cause tail rise weight wheel has re sultant force center wheel behind model Length lever between pivot tail wheel center unaffectedthat can short long Wheel alignment main landing gear also affects tail-draggers propensity groundloop As turn begins load increases wheel outside left turn right wheel heavily loaded Frictional drag wheel increased would tend retard swing model back straight path Wheels toe slightly acceptable would increase drag outside wheel Toe-in measured shorter distance between left right tire centerlines front com pared rear Toe-out opposite condition results less drag outside wheel therefore helps promote ground-loop best tracking runway prefer main gear wheels aim straight ahead few degrees toe-in auto toe-in angle ordinarily about 12 degrees wheel other condition main gear wheels tires very detrimental ground directional sta bility resiliency tire material think soft tires being desirable shock absorbency can contribute groundlooping disposition well have first hand recent experience condition tires too soft will deflect roll over until wheel rim strikes runway know happens because rim edges eroded contact rough runways occurs outside rim large chunks missing along periphery As tire rolls off rim inward outside wing tip lowers toward runway until begins drag classic description ground-loop theory drag outside wing tip shoul4 slow tip correct turn back straight path actuality model swings past straight line overshoots groundloop other directionand away goes scuffing first other its wing tips Nothing could deflate pilots ego display whirls down runway appreciative audience watching obvious remedy use wheels having tires material greater stiffness Use land ing gear shock absorbers rather tires January 1988 143 Bj Co Il 0 Ji x 0 x N G CD CD 1 I m 0 z 0 z z 0 -u 0 -a m I m 0 0 C, -I CD Co 0 0 0 C 0 Co 0 CO CJ1 rh 0 ease models contact runway ware soft tires tail-dragger model Scale modelers have little choice wheel placement either tread width fore aft direction since copying prototype Some Scale models have main wheels quite far aft means CG can close wheel centers especially tail-high landing CG near wheels ground-loop tendency reduced P-S 1 Mustang real problem arrangement possibility tail may too high land ing time CG now almost directly above wheel centers nose-over results Except nasty inclination main gear lo cation P-S 1 very close ideal model ing purposes best tail-draggers ground handling choosing model subject main gear lo Hoitw Horn Old Timer -i1k LRRZOs t sos cIUtodtL RD BREAKER 1941 BROOKLYN DODGER 56 cabin EWE5T* Retail 552g5INTRoDucToRY PRICE*53900 1938 Record Breaker 96 $6956 tS3SZipper 54$5336 1938 Kloud King 63 $42 36 1991 Brigidier 56 $4076 1941 5uper Qoaker 78 $72 76 1948 50 Long 50$3836 1936 Buccaneer 84 $5990 1938 Clipper MKI 72s4156 1937 DalIa/re 188 $75 16 1935 Miss America 84 $7196 1901 Playboy Sr 80 $5116 1991 Playboy Jr 54 $3116 1938 Powerhoose 89 $53 S6 1908 Sailplane 78 $8476 1938 Trenton Terror 72 $4876 1948 Ranger 06$3196 1939 Korda Wake 44 $1916 1939 Mercury 72 $5836 kits qualify 5AM events EF & N/C feature highest quality machine cut & sanded parts Superior alt Competition sheet sod strip wood wire 5 window material PtaOs orig FF hot models ore easily convertible 3ch /C KIT5 Sailpianes Electric power Gas Hobby Horn SENSOAR Glider 78 $1888 Midway Model GNOME R/G Hand Launch Glider$29t8 Jolly Models FLINGER R/G HLG 58 Span $24tt Midway Model FAST EDDIE Aerobatic /05 Elec$19tO Jolly Models ELECTRIGUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3008 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure RASP 37 Direct 05 Electrics $2258 Midway ULTRA MK IV 86 Geared 84 EP $3900 Midway FLYING QUAKER 84 40-454 stroke $6476 Oks/Midway DENNY JR 72 Alum Cowel $6396 p*OOO 005A00U01 i 72 051 05 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail SHIPPING & HANDLING 64 Page CATALOOUE Up $880 add $130 $208 PP/tot Gloss $881 $2000 add $225A copy witl sent $2001 $9508 add $388 free--when requested $4581 $7008 add $358 order over $7000 add $400 HOBBY HORN CA Addressees add 05 tao 15173 Moran St [At Send MO \/isa/MC#-rEmp o Bow 2212 Check allow up 30 Westminster Ca 92684 days CR clearance 714 8938311 COD Esact Charges plus $158 Hdl Cash Only [AftHcs 714 8951203] cation could deciding factors eliminates prototype consideration Wheels far forward CG can spell trouble Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI S30J8 RC Soaring/Blakeslee Continued page 49 must also thank Jack COGG offer ing host international Duration event clubs Dash Cash cross-country race FAI-sanctioned F3H event 87 COGG knows handle international contest think will international Duration event not-too-distant future first need workable rules four five coun tries interested having go also need careful international Duration efforts dilute F3B programs F3B what exists international Sailplane competition must make sure F3B gets maximum support International Duration would specialty event RC Soaringmuch F3H CrossCountry Racing now would fill void fliers Durating dont like building planes Speed Distance tasks Which leads us next bit Whats ultimate Thermal ship Much interest international Duration contest would center what kind Sailplane would turn Out ultimate F3B Speed Distance tasks plus winch war have forced designers pretty tight box de signing Duration mind parame ters would seem opened up considerably Three general categories design can envi sioned 1 The traditional rudder/elevator polyhe dral floater Well perhaps floater apt term since talking about Windrifter polyhedral ship can move out requiredsomething like Larry Jollys 128-in-span Meteor its Eppler 205 airfoil larger polyhedral ships have de veloped Britain Open Class competi tions run 130 160 in span typically have good moving airfoil like Ep pIer 193 Dry wing loadings about mne ounces per square foot low teens Printed below letter Bernard Henwood leading designers breed Duration Sailplane Youll read what Bernard favors about big polyhedral ships 2 The modern straight-wing Thermal com petition design typified Bob Dodgsons 144 Model Aviation 124-in-span Windoong Bob has long maintained considerable justification going re sults recent Nats Windsong better all-around Duration ship because can ride out light stuff no-lift days can still cope windy conditions owing its camber-changing wing Eppler 214 airfoil good professor designed 214 specifi cally all-around Duration flying 111% thick its normal configuration has quite bit undercamber rear half tricky part designed camberchanging Raising flaps ailerons 60 takes Out undercamber produces go fast wing section fast F3B league faster what used thermal compe titions landings flaps go down 90 ai lerons go up about 30 so-called INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN o Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions o Made USA AMA modeler oFits Tx-Sturdy construct oPolyester filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastSure fit oChoose Red Blue Brt Orange AMA patch included yours well sew free NO POSTAL HANDLING FEE send patch color choice SKY-HI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861
Edition: Model Aviation - 1988/01
Page Numbers: 46, 47, 143, 144
K-W RALLY weekend following Labor Day Kitchener-Waterloo Scale Rally gathering place Scale modelers east ern parts Canada US usual quan tity 155 Scale models appeared spite expected rainy weather Flights held up about two hours Saturday afternoon re sumed immediately after showers ceased Flying Dutchmen Club again used system avoiding radio interference Six steel posts driven ground list frequencies attached detachable colored triangle top modeler ready fly parks airplane post bearing frequency trades triangle transmitter impound system works 100% no problems though six lines operation Club-member moni tors make certain good separation tween transmitters flight line Also 31M adjacent-channel interferences nonexist ent dont always see large number new air planes K-W Rally enough make 1200-mile round trip worth reality social aspects K-W sufficient attraction gather lot modelers park ing lot campground adjacent flying field already near-full Friday evening Saturday its jammed motor homes tents vans Groups congregate evening after flights finished converse share experiences invited steak dinner STARS Club Olean NY Flying Dutchmen pro vided evening entertainment large-screen movie Top Gun corn roast late evening several hours after sunset total darkness running engine signals everyone gather flying field Steve Gray demonstrated night flight complete lowlevel aerobatics flying lighted nine-footspan model appeared combination Cub Telemaster Steve uses heads three cheap flash lights illumination novel arrangement Two mounted inside cabin windows projecting beams along lower surfaces wings third bulb reflector aimed rearward through fuselage interior bright illumination radiating means models plastic covering combination light ing Steve capable flights equal daylight Power supply three bulbs extra 48-volt flight pack battery servocontrolled on-off total darkness model very bright Although Canada Quadra country fourstroke invasion has really taken hold also Two very impressive aircraft A-scale CAP 10 Laser models powered Saito 270 twin-cylinder engines Laser using igni tion ultraslow idle complete reliability Both models very aerobatic especially vertical maneuvers Jack Swifts clipped-wing Monocoupe 110 -scale used British Laser 90 four-stroke en gine 125 lb weight airplane very aerobatic capable precision maneu vers equally impressed Paul Weigands new clipped-wing Tayloreraft 225-scale 12 lb 05 120 four-stroke per mitted truly uniimited Aerobatics aerobatic models flown skill preci sion throughout routines STARS Club Olean NY star show both days Six A-scale Bristol Scout biplanes flown loose formation probably last time such quantity models now quite old Quadra Charles Calverts -scale 1911 Avro D spans 87 weighs 15 lb Wings spruce structure Super Coverite Handmade wire wheels have tires -in surgical tubing dummy engine took 140 hours complete partially disguises models OS 120 cu four-stroke Radiator assembled small-diameter tubing Did people ever really fly things like Would today scale details Bobs new Douglas Maliplane Wing walks L look realare made crushed walnut shells model railroad track bal lastl painted inlaid Hobbypoxy Stuff near trailing edge represent wear muddy residue Cockpit cowl panels R held place same prototype drilled pins removable wire hold-down rods Yes theyre functional model 46 Model Aviation Rado Conoi Scale Bob Dolly Wischer 35 powered nearly identical appear ance None pilots dared shift gaze model another few sec onds risk losing identity last years K-W Rally STARS member Bob Dunn displayed new A-scale Curtiss A-i Triad 1911 floatplane first US Naval aircraft year flown numer out occasions using attached wheels flies very well spite extremely thin wings near-scale airfoil section Bob says main float beneath model has insufficient displace ment support model water wonders whether prototype similar difficulties Ordinarily no prizes judging K-W This year award given pilots choice genuine handcrafted Dolly teddy bear Winner Bob Dunn spectacular Triad flights wonder ultimately gets bear Bob has 13 children 13 grandchildren Details Axiom Scale modelers Dont vent just copy cockpit cowl full-size Douglas Mailpiane held place a manner lends itself easy maintenance disas sembly held down long steel wires pass through rows projecting steel pins After observing feature prototype Na tional Museum easy decision copy reduced size model would offer same accessibility internal cockpit details well control mechanisms pins made 062-in-dia brass rod cut length about 25 cross-drilled 025 music wire drill press vise holding pin securely will job hole started No 1 center drill finished No 70 028 drill aluminum cowl prepared next holes drilled along lower edges rather loose fit pins using No 50 070 drillor about size Holes fuselage structure made fit pins closely using aluminum cowl spot exact locations drilling through wood 062-in drill reasonably tight fit pins inserted holes length 025 music wire passed through cross-holes alignment CyA ap Continued page 143 Designed Ken Willard eamaiter 45 Flies off both land water Crisply die-cut balsa lite ply parts complete hardware easy sembly sensible engineering clear plans photo illustrated assembly manual PRECISION Hawker Hurricane MI lic $14950 Wing Span 62 inch Weight 61/2 81/2 lbs Idepends flaps retractsl Full Scale Detail includes S view flaps retracts setup Engine 65-90 FS 60 TS Fiberglass cowl Aero-Pacer $8900 Sport-Trainer Wing Span 641/2 inch Weight 5-7 Ibs Wing load 19-25 oz Engine 45-65 FS 29-45 TS Easily converted tail dragger flaps Video construction tape available Baby-Pacer $5950 Versatile small size Wing Span 50 inch Weight 25-35 Ibs Wing load 19-25 oz tngine 15-40 FS 19-25 TS ELECTRIC HANDCUT SELECTED BALSA AND HARDWOOD PARTS . ALL WITH MADE IN USA QLJALITY DH6O Gipsy Moth $10900 Wing Span 541/4 inch Weight 5-6 Lb Wing Load 15 oz Engine 45-65 FS 35-50 IS Flybaby 2 1 Combo Flybaby $7950 Bipe $9500 Combo $11000 Wing Span 56 44 inches Weight 4-5 Ibs Wing Load 22 14 oz Engine 30-45 ES 25-40 TS AT FIELD CONVERSION 10 MIN Q * AERODROME MODELS LTD MODELS LTD 2623 S MILLER RD SAGINAW Ml 48603 517 781-3000 January 1988 47 STARS club members assemble part show program K-W Rally Six Bristol Scouts Quadra-powered flown together impressively few 155 Scale models attendance 18th annual Kitchener-Waterloo Scale Rally What makes meet popular Fly ing Dutchmen Club policy no judges no prizes no registration fee Complete Catalog $200 ordered direct add W 19th St PO Box 511 E7 Higginsville MO 6 ~'P64037 cail 816584-7121 VISA Mastercard COD money order Add $550 Post Handling Mkh residents add 4% Video Catalog $1000 Beta VHS $5 rebate order Cowls either ABS Fiberglass Plan Packs Available RC Scale/Wischers Continued page 47 plied hole inside fuselage Cement wicked down through hole sur rounded pin freeze position perma nently holes filled appearance used Hobbypoxys Stuff mula arrangement has survived flights music wires havent moved ex cept extracted intentionally servicing models interior September 87 column described method making simulated piano hinges rashly stated whenever see piano hinge can assumed hinge straight line operation letter Hank Farrar informs us least aircraft used piano hinge curved assumption oper ated hinge pin would straighten itself warping aluminum cowl material Strange shapes generated sheet aluminum cowl compound curves meet unyielding piano hinge Oshkosh year searched exam ple curved piano hinge course found cowl fastener Rangerpowered Fairchild 24 appeared dis tance piano hinge curved surface closer examination proved long remov able wire passing through hinge-type segments much same previously described cowl fastening system further checking find some aircraft did use curved piano hinge wire passing through segments removed opening cowl means obviously wasnt really hinge details aircraft have wing walks access passengers cockpit walks rough good traction shoe soles Scale models common method simula tion piece sandpaper emery cloth proper grit size glued place However fin ished product looks just like piece sandpaper may need several strips glued between strengthening ribs have simulated rough wing walk mask ing out walk area coating glue spreading model railroad track ballast wet glue Shake off excess dry paint suit What wonder material Gran ulated walnut shells adheres well can painted case gray dope mixed small amount aluminum powder Tail-dragger problems Ground-loop tendencies tail wheel tail-skid models well known Among fly tail-draggers two kinds pilotsthose have ground-looped will problem arises because wheels being forward models center-of-gravity Once CG begins swing side tends accelerate direction because rolling resistance wheels Prop blast over rud der takeoff can help minimize swing also helps quick rudder control counteract unwanted yaw Keeping tail wheel firm contact runway means Up-elevator control can also help easily overdone model may leave ground three-point position near-stalled attitude Up-elevator should used until rudder control becomes posi tive comes prop blast combined forward motion easing up elevator speed builds Landings somewhat different situation. Prop blast idling engine ineffective models speed provides rudder con trol usually possible get model firmiy runway before ground-loop develops during slowing-up process model tries get away straight heading three-point landing tail wheel firmly planted earth can help keep model straight Tail wheel contact earth has greater effect rudder slowly moving air Often overlooked swiveling tail wheel effect caster angle pivot bottom end pivot must aft top end mea sured three wheels resting hor izontal surface tail wheel tends center itself rearward along airplanes center line moving forward direction have seen Scale models oppo site condition existed tail wheel con stantly trying turn side other model rest dragging rudder along Preferably pivot axis should slop ing bottom pivot slightly aft top vertical would provide neu tral castering operation weight tail wheel will keep wheel centered behind model Swiveling wheel will now cause tail rise weight wheel has re sultant force center wheel behind model Length lever between pivot tail wheel center unaffectedthat can short long Wheel alignment main landing gear also affects tail-draggers propensity groundloop As turn begins load increases wheel outside left turn right wheel heavily loaded Frictional drag wheel increased would tend retard swing model back straight path Wheels toe slightly acceptable would increase drag outside wheel Toe-in measured shorter distance between left right tire centerlines front com pared rear Toe-out opposite condition results less drag outside wheel therefore helps promote ground-loop best tracking runway prefer main gear wheels aim straight ahead few degrees toe-in auto toe-in angle ordinarily about 12 degrees wheel other condition main gear wheels tires very detrimental ground directional sta bility resiliency tire material think soft tires being desirable shock absorbency can contribute groundlooping disposition well have first hand recent experience condition tires too soft will deflect roll over until wheel rim strikes runway know happens because rim edges eroded contact rough runways occurs outside rim large chunks missing along periphery As tire rolls off rim inward outside wing tip lowers toward runway until begins drag classic description ground-loop theory drag outside wing tip shoul4 slow tip correct turn back straight path actuality model swings past straight line overshoots groundloop other directionand away goes scuffing first other its wing tips Nothing could deflate pilots ego display whirls down runway appreciative audience watching obvious remedy use wheels having tires material greater stiffness Use land ing gear shock absorbers rather tires January 1988 143 Bj Co Il 0 Ji x 0 x N G CD CD 1 I m 0 z 0 z z 0 -u 0 -a m I m 0 0 C, -I CD Co 0 0 0 C 0 Co 0 CO CJ1 rh 0 ease models contact runway ware soft tires tail-dragger model Scale modelers have little choice wheel placement either tread width fore aft direction since copying prototype Some Scale models have main wheels quite far aft means CG can close wheel centers especially tail-high landing CG near wheels ground-loop tendency reduced P-S 1 Mustang real problem arrangement possibility tail may too high land ing time CG now almost directly above wheel centers nose-over results Except nasty inclination main gear lo cation P-S 1 very close ideal model ing purposes best tail-draggers ground handling choosing model subject main gear lo Hoitw Horn Old Timer -i1k LRRZOs t sos cIUtodtL RD BREAKER 1941 BROOKLYN DODGER 56 cabin EWE5T* Retail 552g5INTRoDucToRY PRICE*53900 1938 Record Breaker 96 $6956 tS3SZipper 54$5336 1938 Kloud King 63 $42 36 1991 Brigidier 56 $4076 1941 5uper Qoaker 78 $72 76 1948 50 Long 50$3836 1936 Buccaneer 84 $5990 1938 Clipper MKI 72s4156 1937 DalIa/re 188 $75 16 1935 Miss America 84 $7196 1901 Playboy Sr 80 $5116 1991 Playboy Jr 54 $3116 1938 Powerhoose 89 $53 S6 1908 Sailplane 78 $8476 1938 Trenton Terror 72 $4876 1948 Ranger 06$3196 1939 Korda Wake 44 $1916 1939 Mercury 72 $5836 kits qualify 5AM events EF & N/C feature highest quality machine cut & sanded parts Superior alt Competition sheet sod strip wood wire 5 window material PtaOs orig FF hot models ore easily convertible 3ch /C KIT5 Sailpianes Electric power Gas Hobby Horn SENSOAR Glider 78 $1888 Midway Model GNOME R/G Hand Launch Glider$29t8 Jolly Models FLINGER R/G HLG 58 Span $24tt Midway Model FAST EDDIE Aerobatic /05 Elec$19tO Jolly Models ELECTRIGUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3008 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure RASP 37 Direct 05 Electrics $2258 Midway ULTRA MK IV 86 Geared 84 EP $3900 Midway FLYING QUAKER 84 40-454 stroke $6476 Oks/Midway DENNY JR 72 Alum Cowel $6396 p*OOO 005A00U01 i 72 051 05 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail SHIPPING & HANDLING 64 Page CATALOOUE Up $880 add $130 $208 PP/tot Gloss $881 $2000 add $225A copy witl sent $2001 $9508 add $388 free--when requested $4581 $7008 add $358 order over $7000 add $400 HOBBY HORN CA Addressees add 05 tao 15173 Moran St [At Send MO \/isa/MC#-rEmp o Bow 2212 Check allow up 30 Westminster Ca 92684 days CR clearance 714 8938311 COD Esact Charges plus $158 Hdl Cash Only [AftHcs 714 8951203] cation could deciding factors eliminates prototype consideration Wheels far forward CG can spell trouble Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI S30J8 RC Soaring/Blakeslee Continued page 49 must also thank Jack COGG offer ing host international Duration event clubs Dash Cash cross-country race FAI-sanctioned F3H event 87 COGG knows handle international contest think will international Duration event not-too-distant future first need workable rules four five coun tries interested having go also need careful international Duration efforts dilute F3B programs F3B what exists international Sailplane competition must make sure F3B gets maximum support International Duration would specialty event RC Soaringmuch F3H CrossCountry Racing now would fill void fliers Durating dont like building planes Speed Distance tasks Which leads us next bit Whats ultimate Thermal ship Much interest international Duration contest would center what kind Sailplane would turn Out ultimate F3B Speed Distance tasks plus winch war have forced designers pretty tight box de signing Duration mind parame ters would seem opened up considerably Three general categories design can envi sioned 1 The traditional rudder/elevator polyhe dral floater Well perhaps floater apt term since talking about Windrifter polyhedral ship can move out requiredsomething like Larry Jollys 128-in-span Meteor its Eppler 205 airfoil larger polyhedral ships have de veloped Britain Open Class competi tions run 130 160 in span typically have good moving airfoil like Ep pIer 193 Dry wing loadings about mne ounces per square foot low teens Printed below letter Bernard Henwood leading designers breed Duration Sailplane Youll read what Bernard favors about big polyhedral ships 2 The modern straight-wing Thermal com petition design typified Bob Dodgsons 144 Model Aviation 124-in-span Windoong Bob has long maintained considerable justification going re sults recent Nats Windsong better all-around Duration ship because can ride out light stuff no-lift days can still cope windy conditions owing its camber-changing wing Eppler 214 airfoil good professor designed 214 specifi cally all-around Duration flying 111% thick its normal configuration has quite bit undercamber rear half tricky part designed camberchanging Raising flaps ailerons 60 takes Out undercamber produces go fast wing section fast F3B league faster what used thermal compe titions landings flaps go down 90 ai lerons go up about 30 so-called INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN o Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions o Made USA AMA modeler oFits Tx-Sturdy construct oPolyester filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastSure fit oChoose Red Blue Brt Orange AMA patch included yours well sew free NO POSTAL HANDLING FEE send patch color choice SKY-HI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861
Edition: Model Aviation - 1988/01
Page Numbers: 46, 47, 143, 144
K-W RALLY weekend following Labor Day Kitchener-Waterloo Scale Rally gathering place Scale modelers east ern parts Canada US usual quan tity 155 Scale models appeared spite expected rainy weather Flights held up about two hours Saturday afternoon re sumed immediately after showers ceased Flying Dutchmen Club again used system avoiding radio interference Six steel posts driven ground list frequencies attached detachable colored triangle top modeler ready fly parks airplane post bearing frequency trades triangle transmitter impound system works 100% no problems though six lines operation Club-member moni tors make certain good separation tween transmitters flight line Also 31M adjacent-channel interferences nonexist ent dont always see large number new air planes K-W Rally enough make 1200-mile round trip worth reality social aspects K-W sufficient attraction gather lot modelers park ing lot campground adjacent flying field already near-full Friday evening Saturday its jammed motor homes tents vans Groups congregate evening after flights finished converse share experiences invited steak dinner STARS Club Olean NY Flying Dutchmen pro vided evening entertainment large-screen movie Top Gun corn roast late evening several hours after sunset total darkness running engine signals everyone gather flying field Steve Gray demonstrated night flight complete lowlevel aerobatics flying lighted nine-footspan model appeared combination Cub Telemaster Steve uses heads three cheap flash lights illumination novel arrangement Two mounted inside cabin windows projecting beams along lower surfaces wings third bulb reflector aimed rearward through fuselage interior bright illumination radiating means models plastic covering combination light ing Steve capable flights equal daylight Power supply three bulbs extra 48-volt flight pack battery servocontrolled on-off total darkness model very bright Although Canada Quadra country fourstroke invasion has really taken hold also Two very impressive aircraft A-scale CAP 10 Laser models powered Saito 270 twin-cylinder engines Laser using igni tion ultraslow idle complete reliability Both models very aerobatic especially vertical maneuvers Jack Swifts clipped-wing Monocoupe 110 -scale used British Laser 90 four-stroke en gine 125 lb weight airplane very aerobatic capable precision maneu vers equally impressed Paul Weigands new clipped-wing Tayloreraft 225-scale 12 lb 05 120 four-stroke per mitted truly uniimited Aerobatics aerobatic models flown skill preci sion throughout routines STARS Club Olean NY star show both days Six A-scale Bristol Scout biplanes flown loose formation probably last time such quantity models now quite old Quadra Charles Calverts -scale 1911 Avro D spans 87 weighs 15 lb Wings spruce structure Super Coverite Handmade wire wheels have tires -in surgical tubing dummy engine took 140 hours complete partially disguises models OS 120 cu four-stroke Radiator assembled small-diameter tubing Did people ever really fly things like Would today scale details Bobs new Douglas Maliplane Wing walks L look realare made crushed walnut shells model railroad track bal lastl painted inlaid Hobbypoxy Stuff near trailing edge represent wear muddy residue Cockpit cowl panels R held place same prototype drilled pins removable wire hold-down rods Yes theyre functional model 46 Model Aviation Rado Conoi Scale Bob Dolly Wischer 35 powered nearly identical appear ance None pilots dared shift gaze model another few sec onds risk losing identity last years K-W Rally STARS member Bob Dunn displayed new A-scale Curtiss A-i Triad 1911 floatplane first US Naval aircraft year flown numer out occasions using attached wheels flies very well spite extremely thin wings near-scale airfoil section Bob says main float beneath model has insufficient displace ment support model water wonders whether prototype similar difficulties Ordinarily no prizes judging K-W This year award given pilots choice genuine handcrafted Dolly teddy bear Winner Bob Dunn spectacular Triad flights wonder ultimately gets bear Bob has 13 children 13 grandchildren Details Axiom Scale modelers Dont vent just copy cockpit cowl full-size Douglas Mailpiane held place a manner lends itself easy maintenance disas sembly held down long steel wires pass through rows projecting steel pins After observing feature prototype Na tional Museum easy decision copy reduced size model would offer same accessibility internal cockpit details well control mechanisms pins made 062-in-dia brass rod cut length about 25 cross-drilled 025 music wire drill press vise holding pin securely will job hole started No 1 center drill finished No 70 028 drill aluminum cowl prepared next holes drilled along lower edges rather loose fit pins using No 50 070 drillor about size Holes fuselage structure made fit pins closely using aluminum cowl spot exact locations drilling through wood 062-in drill reasonably tight fit pins inserted holes length 025 music wire passed through cross-holes alignment CyA ap Continued page 143 Designed Ken Willard eamaiter 45 Flies off both land water Crisply die-cut balsa lite ply parts complete hardware easy sembly sensible engineering clear plans photo illustrated assembly manual PRECISION Hawker Hurricane MI lic $14950 Wing Span 62 inch Weight 61/2 81/2 lbs Idepends flaps retractsl Full Scale Detail includes S view flaps retracts setup Engine 65-90 FS 60 TS Fiberglass cowl Aero-Pacer $8900 Sport-Trainer Wing Span 641/2 inch Weight 5-7 Ibs Wing load 19-25 oz Engine 45-65 FS 29-45 TS Easily converted tail dragger flaps Video construction tape available Baby-Pacer $5950 Versatile small size Wing Span 50 inch Weight 25-35 Ibs Wing load 19-25 oz tngine 15-40 FS 19-25 TS ELECTRIC HANDCUT SELECTED BALSA AND HARDWOOD PARTS . ALL WITH MADE IN USA QLJALITY DH6O Gipsy Moth $10900 Wing Span 541/4 inch Weight 5-6 Lb Wing Load 15 oz Engine 45-65 FS 35-50 IS Flybaby 2 1 Combo Flybaby $7950 Bipe $9500 Combo $11000 Wing Span 56 44 inches Weight 4-5 Ibs Wing Load 22 14 oz Engine 30-45 ES 25-40 TS AT FIELD CONVERSION 10 MIN Q * AERODROME MODELS LTD MODELS LTD 2623 S MILLER RD SAGINAW Ml 48603 517 781-3000 January 1988 47 STARS club members assemble part show program K-W Rally Six Bristol Scouts Quadra-powered flown together impressively few 155 Scale models attendance 18th annual Kitchener-Waterloo Scale Rally What makes meet popular Fly ing Dutchmen Club policy no judges no prizes no registration fee Complete Catalog $200 ordered direct add W 19th St PO Box 511 E7 Higginsville MO 6 ~'P64037 cail 816584-7121 VISA Mastercard COD money order Add $550 Post Handling Mkh residents add 4% Video Catalog $1000 Beta VHS $5 rebate order Cowls either ABS Fiberglass Plan Packs Available RC Scale/Wischers Continued page 47 plied hole inside fuselage Cement wicked down through hole sur rounded pin freeze position perma nently holes filled appearance used Hobbypoxys Stuff mula arrangement has survived flights music wires havent moved ex cept extracted intentionally servicing models interior September 87 column described method making simulated piano hinges rashly stated whenever see piano hinge can assumed hinge straight line operation letter Hank Farrar informs us least aircraft used piano hinge curved assumption oper ated hinge pin would straighten itself warping aluminum cowl material Strange shapes generated sheet aluminum cowl compound curves meet unyielding piano hinge Oshkosh year searched exam ple curved piano hinge course found cowl fastener Rangerpowered Fairchild 24 appeared dis tance piano hinge curved surface closer examination proved long remov able wire passing through hinge-type segments much same previously described cowl fastening system further checking find some aircraft did use curved piano hinge wire passing through segments removed opening cowl means obviously wasnt really hinge details aircraft have wing walks access passengers cockpit walks rough good traction shoe soles Scale models common method simula tion piece sandpaper emery cloth proper grit size glued place However fin ished product looks just like piece sandpaper may need several strips glued between strengthening ribs have simulated rough wing walk mask ing out walk area coating glue spreading model railroad track ballast wet glue Shake off excess dry paint suit What wonder material Gran ulated walnut shells adheres well can painted case gray dope mixed small amount aluminum powder Tail-dragger problems Ground-loop tendencies tail wheel tail-skid models well known Among fly tail-draggers two kinds pilotsthose have ground-looped will problem arises because wheels being forward models center-of-gravity Once CG begins swing side tends accelerate direction because rolling resistance wheels Prop blast over rud der takeoff can help minimize swing also helps quick rudder control counteract unwanted yaw Keeping tail wheel firm contact runway means Up-elevator control can also help easily overdone model may leave ground three-point position near-stalled attitude Up-elevator should used until rudder control becomes posi tive comes prop blast combined forward motion easing up elevator speed builds Landings somewhat different situation. Prop blast idling engine ineffective models speed provides rudder con trol usually possible get model firmiy runway before ground-loop develops during slowing-up process model tries get away straight heading three-point landing tail wheel firmly planted earth can help keep model straight Tail wheel contact earth has greater effect rudder slowly moving air Often overlooked swiveling tail wheel effect caster angle pivot bottom end pivot must aft top end mea sured three wheels resting hor izontal surface tail wheel tends center itself rearward along airplanes center line moving forward direction have seen Scale models oppo site condition existed tail wheel con stantly trying turn side other model rest dragging rudder along Preferably pivot axis should slop ing bottom pivot slightly aft top vertical would provide neu tral castering operation weight tail wheel will keep wheel centered behind model Swiveling wheel will now cause tail rise weight wheel has re sultant force center wheel behind model Length lever between pivot tail wheel center unaffectedthat can short long Wheel alignment main landing gear also affects tail-draggers propensity groundloop As turn begins load increases wheel outside left turn right wheel heavily loaded Frictional drag wheel increased would tend retard swing model back straight path Wheels toe slightly acceptable would increase drag outside wheel Toe-in measured shorter distance between left right tire centerlines front com pared rear Toe-out opposite condition results less drag outside wheel therefore helps promote ground-loop best tracking runway prefer main gear wheels aim straight ahead few degrees toe-in auto toe-in angle ordinarily about 12 degrees wheel other condition main gear wheels tires very detrimental ground directional sta bility resiliency tire material think soft tires being desirable shock absorbency can contribute groundlooping disposition well have first hand recent experience condition tires too soft will deflect roll over until wheel rim strikes runway know happens because rim edges eroded contact rough runways occurs outside rim large chunks missing along periphery As tire rolls off rim inward outside wing tip lowers toward runway until begins drag classic description ground-loop theory drag outside wing tip shoul4 slow tip correct turn back straight path actuality model swings past straight line overshoots groundloop other directionand away goes scuffing first other its wing tips Nothing could deflate pilots ego display whirls down runway appreciative audience watching obvious remedy use wheels having tires material greater stiffness Use land ing gear shock absorbers rather tires January 1988 143 Bj Co Il 0 Ji x 0 x N G CD CD 1 I m 0 z 0 z z 0 -u 0 -a m I m 0 0 C, -I CD Co 0 0 0 C 0 Co 0 CO CJ1 rh 0 ease models contact runway ware soft tires tail-dragger model Scale modelers have little choice wheel placement either tread width fore aft direction since copying prototype Some Scale models have main wheels quite far aft means CG can close wheel centers especially tail-high landing CG near wheels ground-loop tendency reduced P-S 1 Mustang real problem arrangement possibility tail may too high land ing time CG now almost directly above wheel centers nose-over results Except nasty inclination main gear lo cation P-S 1 very close ideal model ing purposes best tail-draggers ground handling choosing model subject main gear lo Hoitw Horn Old Timer -i1k LRRZOs t sos cIUtodtL RD BREAKER 1941 BROOKLYN DODGER 56 cabin EWE5T* Retail 552g5INTRoDucToRY PRICE*53900 1938 Record Breaker 96 $6956 tS3SZipper 54$5336 1938 Kloud King 63 $42 36 1991 Brigidier 56 $4076 1941 5uper Qoaker 78 $72 76 1948 50 Long 50$3836 1936 Buccaneer 84 $5990 1938 Clipper MKI 72s4156 1937 DalIa/re 188 $75 16 1935 Miss America 84 $7196 1901 Playboy Sr 80 $5116 1991 Playboy Jr 54 $3116 1938 Powerhoose 89 $53 S6 1908 Sailplane 78 $8476 1938 Trenton Terror 72 $4876 1948 Ranger 06$3196 1939 Korda Wake 44 $1916 1939 Mercury 72 $5836 kits qualify 5AM events EF & N/C feature highest quality machine cut & sanded parts Superior alt Competition sheet sod strip wood wire 5 window material PtaOs orig FF hot models ore easily convertible 3ch /C KIT5 Sailpianes Electric power Gas Hobby Horn SENSOAR Glider 78 $1888 Midway Model GNOME R/G Hand Launch Glider$29t8 Jolly Models FLINGER R/G HLG 58 Span $24tt Midway Model FAST EDDIE Aerobatic /05 Elec$19tO Jolly Models ELECTRIGUS Electric Glider 05s$3258 Leisure PLAYBOY SR 67 Gear 05 Elect $3008 Astro ASTRO SPORT 37 Direct 05 Elect $2250 Leisure RASP 37 Direct 05 Electrics $2258 Midway ULTRA MK IV 86 Geared 84 EP $3900 Midway FLYING QUAKER 84 40-454 stroke $6476 Oks/Midway DENNY JR 72 Alum Cowel $6396 p*OOO 005A00U01 i 72 051 05 FULL LINE OF ELECTRIC SYSTEMS 5 Parts Avail SHIPPING & HANDLING 64 Page CATALOOUE Up $880 add $130 $208 PP/tot Gloss $881 $2000 add $225A copy witl sent $2001 $9508 add $388 free--when requested $4581 $7008 add $358 order over $7000 add $400 HOBBY HORN CA Addressees add 05 tao 15173 Moran St [At Send MO \/isa/MC#-rEmp o Bow 2212 Check allow up 30 Westminster Ca 92684 days CR clearance 714 8938311 COD Esact Charges plus $158 Hdl Cash Only [AftHcs 714 8951203] cation could deciding factors eliminates prototype consideration Wheels far forward CG can spell trouble Bob Dolly Wiseher S-221 Lapham Peak Rd Delafield WI S30J8 RC Soaring/Blakeslee Continued page 49 must also thank Jack COGG offer ing host international Duration event clubs Dash Cash cross-country race FAI-sanctioned F3H event 87 COGG knows handle international contest think will international Duration event not-too-distant future first need workable rules four five coun tries interested having go also need careful international Duration efforts dilute F3B programs F3B what exists international Sailplane competition must make sure F3B gets maximum support International Duration would specialty event RC Soaringmuch F3H CrossCountry Racing now would fill void fliers Durating dont like building planes Speed Distance tasks Which leads us next bit Whats ultimate Thermal ship Much interest international Duration contest would center what kind Sailplane would turn Out ultimate F3B Speed Distance tasks plus winch war have forced designers pretty tight box de signing Duration mind parame ters would seem opened up considerably Three general categories design can envi sioned 1 The traditional rudder/elevator polyhe dral floater Well perhaps floater apt term since talking about Windrifter polyhedral ship can move out requiredsomething like Larry Jollys 128-in-span Meteor its Eppler 205 airfoil larger polyhedral ships have de veloped Britain Open Class competi tions run 130 160 in span typically have good moving airfoil like Ep pIer 193 Dry wing loadings about mne ounces per square foot low teens Printed below letter Bernard Henwood leading designers breed Duration Sailplane Youll read what Bernard favors about big polyhedral ships 2 The modern straight-wing Thermal com petition design typified Bob Dodgsons 144 Model Aviation 124-in-span Windoong Bob has long maintained considerable justification going re sults recent Nats Windsong better all-around Duration ship because can ride out light stuff no-lift days can still cope windy conditions owing its camber-changing wing Eppler 214 airfoil good professor designed 214 specifi cally all-around Duration flying 111% thick its normal configuration has quite bit undercamber rear half tricky part designed camberchanging Raising flaps ailerons 60 takes Out undercamber produces go fast wing section fast F3B league faster what used thermal compe titions landings flaps go down 90 ai lerons go up about 30 so-called INTRODUCING NEW COLD WEATHER FRIEND YOU CAN COUNT ON TRANZMITTEN o Simple yet very effective 0 Keeps out wind cold o Will restrict hand motions o Made USA AMA modeler oFits Tx-Sturdy construct oPolyester filled nylon quilting oCotton jersey lining lD label 0Velcro closuresfastSure fit oChoose Red Blue Brt Orange AMA patch included yours well sew free NO POSTAL HANDLING FEE send patch color choice SKY-HI ENTERPRISE 422E 20th AVE COLUMBUS OHIO 43201 SATISFACTION GUARANTEED AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861