WOW 1990 racing season about end what busy summer its have racing Texas up North first handy new item As Pylon Racers know setting needle just about engine can pretty tricky No matter locate tank engine will run slightly rich beginning race almost overlean end set engine too rich may just get moving race ends start out too lean youll go like gangbusters start gin run too lean about midway through risk blown plug and/or ruined engine Ive found regulator helps control richness mixture result can control some aspects race course regu lators have used Control Line Speed years work order accommodate regulator fuel system must use either pen bladder surgical tubing fuel tank see sketch Use kind tank will assure constant positive fuel pressure engine regulator operates pulses pressure fitting engine crankcase Inside diaphragm opens closes valve regulator use valve small ball bearing supply fuel regulator under con stant pressure pen bladder As en gine turns over creates small pulse air opens valve allows fuel flow through regulator carburetor faster engine runs pulses get pulse allows fuel pass Youll still have adjust needle valve engine setting will remain same start finish Boy sure has worked year purchased regulator Northwest Hobby Supply 13923 Pacific Ave Tacoma WA 98444 call 1-800/541-0654 Quickie fliers Northwest sells Q-500 kit called Edge Lets go up North some race reports taken article written Chuck Wooley CAPS newsletter about Midwest RC Clubs Quickie 500 Race held June 24th Race day started out bleary wet 10 am sound engines prevailed Roaring flight line reaching extra Rs 27 en trants newly designed Quickies stood ready combat around pylons seem have offended wind god retali ated gusts 20 mph share bumpy flying first flight around pylons de signed give workers some practice course also gave spectators view 020 STAINLESS SiFETY WIRE two places end 6/32 fuel fitting equivelent b/N aluminum plug grooves 325 - surgical tubing 1/4 ID-l/8 wall 2-in dia plastic bottle 6 8 long makes good fuel tank Shampoo bottle siliconed firewall fuselage side works well Make hole large enough get tank out FITTING C PRESSURE IN FROM CRANKCASE FITTIE3 FITTING FuEL IN FRQ1 BLAODER FITTING fl FUEL OUT TO VENTURI Top view regulator Columnist Hager mounts 1/B-In ply epoxies side cheek cowl under engine Regulator needs pen bladder surgical tubing fuel tank first crash day other yours truly glad get out way early ran smoothly rest day some close competition race Flyoffs places through five necessary because high point stand ings no question about Fast Time award Craig Grunkenmeyer claimed honor first place boot results 1 Craig Grunkenmeyer 12033 2 D Gohn 122 3 R Kepper 129 4 D Sumner 123 5S Gilkey 134 6 P Wa ter Sr 126 7 K Heatlie 130 8 Price 130 9 J Cohen 130 10 J Schwarz 140 Now another contest report written Rick Cromer eighteenth annual Great Lakes Miniature Air Race held June 2-3 Toledo Fly ing Tigers field Contest Director Rick Cromer opened event recognizing workers club members tremendous amount work have done field has never looked better Les Haddad Hobby Stop West TURN sponsored race Tigers able use 50/50 cash prize format still have little left over kitty Prizes given first through 11th place fast time Mother Nature dealt us mixed hand round started bright sun 25-knot crosswind like hangover thats best day Nevertheless battled wind other five rounds very fast airplanes surprisingly few mishaps Den nis Sumner flew usual course wire Ray Blake trim problems Dan Kane Jr faster greased pig Grunkenmeyer/Dodd Columbus Boys consistent Grove/Weidman team smoking round two Keith Welbaum came Out 120-mph speed 60-mph thumbs T-boned Heinkel Ray Blake flashlighted infield Knepper Weidman found Good props After five good rounds broke day hoping better weather Sunday Sunday proved beautiful day wind right down course900 miles per hour ran round held up couple hours hopes lull ahead front move through lull never came vote pilots ended contest six heats completed thanks contestants sup ported event Hobby Stop West TURN Flying Tigers R/C Club great event Results 1 Al Grove 18 pt 2 Craig Grunk enmeyer 15 pt 3 Dennis Sumner 15 pt 4 Joe Dodd 15 pt 5 Dan Kane Jr 13 pt 6 Dave Latsha 13 pt 7 Bob Hisey 13 pt 8 Joe Cohen 13 pt 9 Don Weidman 12 Pt 11922 Fast Time 10 Ken Heatlie 11 p1 11 Allen Booth 11 Pt Red River Texas Formula 1 Championships held June 9-10 reported Doug Powell Wichita Falls skies clear winds light brisk Temperatures process climbing upper nineties field freshly mowed support equipment place As sun began its slow ascent horizon 22 pilots began unloading planes readying days racing ac tivities 900 am nearly preliminaries finished As sound last engine test run faded Johnson grass mesquite surround flying field course workers took up assigned positions first pi lots took field point virtual nonstop ac tion worked Quickie 500 race before never Formula event fact seen other Formula racea number years ago up Prince George RC Field Maryland mean tell view work station cage turn number incredible planes pilots made profound im pression course being cage really privy blow-by-blow events transpired down pits along scoreboards Most what can tell what related sit-down Jerry Denton office some days later Just prior start flying Saturday morning static judging pilots winner Best Show award won JP Hanway very pretty plane stood up some heavy competition Continued page 172 64 Model Aviation Radio Confrol Pylon Racing Bill Hager 4HollyDr Conm modela fill need hotdog show-off sport plane Knife edge take-offs flat apins snaps anything can Wing foam Fuselage Tail lite ply balsa Builds quick lands like trainer Flyingweight lOlba 184 1 l3lbs 192 Ohio OHIO SUPERSTAR PRODUCTS INC 11376 RIOGEWAY ROADKENSINGTON OHIO 44427 r 216-223-1950 great idea cant resist quoting Mr Stahls comments opening paragraph Overemphasis strictly flying designs con tests throughout country recent years has brought about unwarranted condition ne glect building flying Scale semiscale models Much favoritism must tributed desire maximum performance since little need said relative appearance neatly built Scale ship usual contest design SAM Italia Dr Ferdinando Gale Baveno aly recently sent interesting handbook about Eastern bloc engines written Cesare de Robertis Well illustrated unusual model power plants text Italian available Gale Via Marconi 10 28042 Baveno NO Italy interesting material de signs emerging SAM Italia including several magnificent construction drawings beautiful Italian Gliders pre-WW II era available B2 Streamlines PO Box 976 Olalla WA 98359 RC Pylon/Hager Continued page 64 no mediocre planes event fact well done dont know pilots selected would show two three brought along would still out trying decide Id vote collection absolutely beautiful takeoff area too narrow support four planes up heats threeplane blasts Plans have made things works widen takeoff area fourplane heats can accommodated next spring top 10 finishers Saturday 1 Randy Rich 11480 2 Richard Oliver 11701 3 Red Cranfield 12189 4 Phil Bussell 11742 5 Jim Young 11859 6 Bill Hager 11539 7 Hubert Wills 11905 8 Norm Johnson 11473 9 Dub Jets 11487 10 Sam Womack 11656 Just keep everyones attention two midairs Saturday both occurring just out turn number three Poor Bob Greer par ticipant little high-speed tangos Dave Layman Bill Hager Jerry Small tried trade little paint flight wound up getting planes dirty easier transport under seat Sundays action just hot heavy make sure moves down pat Bob Greer provided present what violent midair collision since vention prop happened about 20 ft di rectly behind above head stood cage turn number pilot lane made clock locked ac tion happened felt bad pilots crash itself right out movies another midair just out turn number three tame comparison Bob Greer/Hubert Wills fiasco earlier com pletely forgot get names pilots volved Yours Truly Bill Hager Jerry SmallBH Top five finishers Sunday 1 Dub Jett 11685 2 Red Cranfield l193 Phil Bussell 12059 4 Bill Hager 11614 5 Montie Montcrief 11620 6 Clay Gary 11509 7 Dave Layman 11381 8 Norm Johnson 11415 9 Randy Ritch 11529 10 Sam Wo mack 12772 Fast time meet 11090 turned Jerry Small lot really good close tight racing action both days can per sonally vouch quality food available heard nothing praise con dition fieldits size its location think two quotes heard often Yall have best racing facilities around grass field absolutely fantastic shape nice words made feel kinda proud field proud have small part core club members come out work event got meet some super-nice guys see some beautiful planes doin some really competitive racing besides Bob Greer Ill long time talking about Sun day midair yours Take guys put first-class race the field great shape See next month Caudimordax/Taib Continued page 71 wing lift being generated farther out root Very high aspect ratio wings demand extra strength conse quently added weight spars root particular application will demand aspect ratio provides best combi nation weight efficiency Cau dimordax aspect ratio 61 cho sen allowed convenient wing span 48 inches Styrofoam comes 2-ftwide sheetsjust right wing panel mean chord eight inches al lows 10-in root 6-in tip 60% tip/root percentage Such wing core too difficult cut trailing edge swept forward three inches lead ing edge swept back inch producing net sweep quarter-chord zero Experiments straight leading edge produced airplanes unpleasant snap rolling tendencies swept leading edge also allows easier placement spars greater lead-out sweep Eliminating high-speed stall Turning airplane too tightly causes wing stall wing forced produce lift capable producing produce lift angle attack must creased Beyond certain angle attack air flow along top wing separates wings surface becomes turbu lent causing sudden increase drag Most Combat fliers adjust controls limit turn radius order avoid stal ling Another approach use thicker blunter airfoil stalls higher Us thin does drawback ap proach course thicker airfoil has greater parasitic drag top speed reduced accordingly Caudimordax root section thick 15% tip thicker 25% relatively thicker tip airfoil ensures root will stall first turn thus reduc ing airplanes tendency drop wing tip tendency causes lateral instabil ity common high aspect ratio Combat wings Longitudinal stability An airplane does tight fast turns absolutely no use cant make go want go common problem Combat wings lack longitudinal stability turn once started will tighten up its own ac cord makes airplane unpointable therefore useless Combat air plane should also able fly straight unattended An unstable airplane will tend tighten wander out turn pilot glances away inslant common misconception sta 172 Model Aviation SPORTOBATIC 2 84 For1204cycleand 902-cycle rST 200025003000-0 PS 18 NEWOS BGX 13500
Edition: Model Aviation - 1990/12
Page Numbers: 64, 172
WOW 1990 racing season about end what busy summer its have racing Texas up North first handy new item As Pylon Racers know setting needle just about engine can pretty tricky No matter locate tank engine will run slightly rich beginning race almost overlean end set engine too rich may just get moving race ends start out too lean youll go like gangbusters start gin run too lean about midway through risk blown plug and/or ruined engine Ive found regulator helps control richness mixture result can control some aspects race course regu lators have used Control Line Speed years work order accommodate regulator fuel system must use either pen bladder surgical tubing fuel tank see sketch Use kind tank will assure constant positive fuel pressure engine regulator operates pulses pressure fitting engine crankcase Inside diaphragm opens closes valve regulator use valve small ball bearing supply fuel regulator under con stant pressure pen bladder As en gine turns over creates small pulse air opens valve allows fuel flow through regulator carburetor faster engine runs pulses get pulse allows fuel pass Youll still have adjust needle valve engine setting will remain same start finish Boy sure has worked year purchased regulator Northwest Hobby Supply 13923 Pacific Ave Tacoma WA 98444 call 1-800/541-0654 Quickie fliers Northwest sells Q-500 kit called Edge Lets go up North some race reports taken article written Chuck Wooley CAPS newsletter about Midwest RC Clubs Quickie 500 Race held June 24th Race day started out bleary wet 10 am sound engines prevailed Roaring flight line reaching extra Rs 27 en trants newly designed Quickies stood ready combat around pylons seem have offended wind god retali ated gusts 20 mph share bumpy flying first flight around pylons de signed give workers some practice course also gave spectators view 020 STAINLESS SiFETY WIRE two places end 6/32 fuel fitting equivelent b/N aluminum plug grooves 325 - surgical tubing 1/4 ID-l/8 wall 2-in dia plastic bottle 6 8 long makes good fuel tank Shampoo bottle siliconed firewall fuselage side works well Make hole large enough get tank out FITTING C PRESSURE IN FROM CRANKCASE FITTIE3 FITTING FuEL IN FRQ1 BLAODER FITTING fl FUEL OUT TO VENTURI Top view regulator Columnist Hager mounts 1/B-In ply epoxies side cheek cowl under engine Regulator needs pen bladder surgical tubing fuel tank first crash day other yours truly glad get out way early ran smoothly rest day some close competition race Flyoffs places through five necessary because high point stand ings no question about Fast Time award Craig Grunkenmeyer claimed honor first place boot results 1 Craig Grunkenmeyer 12033 2 D Gohn 122 3 R Kepper 129 4 D Sumner 123 5S Gilkey 134 6 P Wa ter Sr 126 7 K Heatlie 130 8 Price 130 9 J Cohen 130 10 J Schwarz 140 Now another contest report written Rick Cromer eighteenth annual Great Lakes Miniature Air Race held June 2-3 Toledo Fly ing Tigers field Contest Director Rick Cromer opened event recognizing workers club members tremendous amount work have done field has never looked better Les Haddad Hobby Stop West TURN sponsored race Tigers able use 50/50 cash prize format still have little left over kitty Prizes given first through 11th place fast time Mother Nature dealt us mixed hand round started bright sun 25-knot crosswind like hangover thats best day Nevertheless battled wind other five rounds very fast airplanes surprisingly few mishaps Den nis Sumner flew usual course wire Ray Blake trim problems Dan Kane Jr faster greased pig Grunkenmeyer/Dodd Columbus Boys consistent Grove/Weidman team smoking round two Keith Welbaum came Out 120-mph speed 60-mph thumbs T-boned Heinkel Ray Blake flashlighted infield Knepper Weidman found Good props After five good rounds broke day hoping better weather Sunday Sunday proved beautiful day wind right down course900 miles per hour ran round held up couple hours hopes lull ahead front move through lull never came vote pilots ended contest six heats completed thanks contestants sup ported event Hobby Stop West TURN Flying Tigers R/C Club great event Results 1 Al Grove 18 pt 2 Craig Grunk enmeyer 15 pt 3 Dennis Sumner 15 pt 4 Joe Dodd 15 pt 5 Dan Kane Jr 13 pt 6 Dave Latsha 13 pt 7 Bob Hisey 13 pt 8 Joe Cohen 13 pt 9 Don Weidman 12 Pt 11922 Fast Time 10 Ken Heatlie 11 p1 11 Allen Booth 11 Pt Red River Texas Formula 1 Championships held June 9-10 reported Doug Powell Wichita Falls skies clear winds light brisk Temperatures process climbing upper nineties field freshly mowed support equipment place As sun began its slow ascent horizon 22 pilots began unloading planes readying days racing ac tivities 900 am nearly preliminaries finished As sound last engine test run faded Johnson grass mesquite surround flying field course workers took up assigned positions first pi lots took field point virtual nonstop ac tion worked Quickie 500 race before never Formula event fact seen other Formula racea number years ago up Prince George RC Field Maryland mean tell view work station cage turn number incredible planes pilots made profound im pression course being cage really privy blow-by-blow events transpired down pits along scoreboards Most what can tell what related sit-down Jerry Denton office some days later Just prior start flying Saturday morning static judging pilots winner Best Show award won JP Hanway very pretty plane stood up some heavy competition Continued page 172 64 Model Aviation Radio Confrol Pylon Racing Bill Hager 4HollyDr Conm modela fill need hotdog show-off sport plane Knife edge take-offs flat apins snaps anything can Wing foam Fuselage Tail lite ply balsa Builds quick lands like trainer Flyingweight lOlba 184 1 l3lbs 192 Ohio OHIO SUPERSTAR PRODUCTS INC 11376 RIOGEWAY ROADKENSINGTON OHIO 44427 r 216-223-1950 great idea cant resist quoting Mr Stahls comments opening paragraph Overemphasis strictly flying designs con tests throughout country recent years has brought about unwarranted condition ne glect building flying Scale semiscale models Much favoritism must tributed desire maximum performance since little need said relative appearance neatly built Scale ship usual contest design SAM Italia Dr Ferdinando Gale Baveno aly recently sent interesting handbook about Eastern bloc engines written Cesare de Robertis Well illustrated unusual model power plants text Italian available Gale Via Marconi 10 28042 Baveno NO Italy interesting material de signs emerging SAM Italia including several magnificent construction drawings beautiful Italian Gliders pre-WW II era available B2 Streamlines PO Box 976 Olalla WA 98359 RC Pylon/Hager Continued page 64 no mediocre planes event fact well done dont know pilots selected would show two three brought along would still out trying decide Id vote collection absolutely beautiful takeoff area too narrow support four planes up heats threeplane blasts Plans have made things works widen takeoff area fourplane heats can accommodated next spring top 10 finishers Saturday 1 Randy Rich 11480 2 Richard Oliver 11701 3 Red Cranfield 12189 4 Phil Bussell 11742 5 Jim Young 11859 6 Bill Hager 11539 7 Hubert Wills 11905 8 Norm Johnson 11473 9 Dub Jets 11487 10 Sam Womack 11656 Just keep everyones attention two midairs Saturday both occurring just out turn number three Poor Bob Greer par ticipant little high-speed tangos Dave Layman Bill Hager Jerry Small tried trade little paint flight wound up getting planes dirty easier transport under seat Sundays action just hot heavy make sure moves down pat Bob Greer provided present what violent midair collision since vention prop happened about 20 ft di rectly behind above head stood cage turn number pilot lane made clock locked ac tion happened felt bad pilots crash itself right out movies another midair just out turn number three tame comparison Bob Greer/Hubert Wills fiasco earlier com pletely forgot get names pilots volved Yours Truly Bill Hager Jerry SmallBH Top five finishers Sunday 1 Dub Jett 11685 2 Red Cranfield l193 Phil Bussell 12059 4 Bill Hager 11614 5 Montie Montcrief 11620 6 Clay Gary 11509 7 Dave Layman 11381 8 Norm Johnson 11415 9 Randy Ritch 11529 10 Sam Wo mack 12772 Fast time meet 11090 turned Jerry Small lot really good close tight racing action both days can per sonally vouch quality food available heard nothing praise con dition fieldits size its location think two quotes heard often Yall have best racing facilities around grass field absolutely fantastic shape nice words made feel kinda proud field proud have small part core club members come out work event got meet some super-nice guys see some beautiful planes doin some really competitive racing besides Bob Greer Ill long time talking about Sun day midair yours Take guys put first-class race the field great shape See next month Caudimordax/Taib Continued page 71 wing lift being generated farther out root Very high aspect ratio wings demand extra strength conse quently added weight spars root particular application will demand aspect ratio provides best combi nation weight efficiency Cau dimordax aspect ratio 61 cho sen allowed convenient wing span 48 inches Styrofoam comes 2-ftwide sheetsjust right wing panel mean chord eight inches al lows 10-in root 6-in tip 60% tip/root percentage Such wing core too difficult cut trailing edge swept forward three inches lead ing edge swept back inch producing net sweep quarter-chord zero Experiments straight leading edge produced airplanes unpleasant snap rolling tendencies swept leading edge also allows easier placement spars greater lead-out sweep Eliminating high-speed stall Turning airplane too tightly causes wing stall wing forced produce lift capable producing produce lift angle attack must creased Beyond certain angle attack air flow along top wing separates wings surface becomes turbu lent causing sudden increase drag Most Combat fliers adjust controls limit turn radius order avoid stal ling Another approach use thicker blunter airfoil stalls higher Us thin does drawback ap proach course thicker airfoil has greater parasitic drag top speed reduced accordingly Caudimordax root section thick 15% tip thicker 25% relatively thicker tip airfoil ensures root will stall first turn thus reduc ing airplanes tendency drop wing tip tendency causes lateral instabil ity common high aspect ratio Combat wings Longitudinal stability An airplane does tight fast turns absolutely no use cant make go want go common problem Combat wings lack longitudinal stability turn once started will tighten up its own ac cord makes airplane unpointable therefore useless Combat air plane should also able fly straight unattended An unstable airplane will tend tighten wander out turn pilot glances away inslant common misconception sta 172 Model Aviation SPORTOBATIC 2 84 For1204cycleand 902-cycle rST 200025003000-0 PS 18 NEWOS BGX 13500