CONTROL LINE RACING s good uniflow-type fuel tank design Fox-Goldberg racing Bill Bischoff OOLPROOF profile tank As 52 popularity sportfFoxberg racing has dramatically increased have received numerous requests foolproof profile tank runs steadily quick fill delivers right number laps Various local restrictions mandate no fuel shutoffs A-in fill tubes improved uniflow tank design shown page sport racing FoxGoldberg racing uses K&S easy solder tin /8-in brass tubing Begin making copy full-size patterns Cut pieces out shears accurately possible Beginning overlap fold body tank along dotted line paper pattern will end up inboard side tank completed overlap will along top inboard side tank outside inboard surface Solder seam between overlap inboard side Bend front tank overlapping tabs fit outside Solder front punch holes fill overflow pickup using punch awl Dont drill holes awl will produce tabs result much stronger solder joints around tubes pickup tube about -in long ends up just inside tank fill overflow tubes also end just inside tank Both tubes must inboard pickup Unlike standard uniflow tanks isnt necessary cap either tubes flight results faster pit stops Before installing rear cover thoroughly wash flux residue Continued page 115 96 Model Aviation ard side Bottom Front Outboard side oFill up 0 TopBack Location Overlapfor overflow Bob Caddell grand champion shows off trophy Chester Jeep powered Fox 40 pylon engine Howard Shahan left Larry Dziak Jr Fast Rat final Howards airplane six Golden Age Racers readywas faster Larry won event time trials1991 Nats quick pit stops RC Flying Today/Myers Continued page 66 new narrow-band radios doesnt solve RC radio problems Dear George thought new narrow-band radios supposed cure problems So come receiver RC24 went nuts pits whenever two transmitters RC4O RC56 turned same time trans mitters FM receiver AM AM transmitter off time /s/W K Weinrich AMA 158422 Miami Springs FL Heres figure answer problem Take RC channel numbers question Subtract RC40 RC56 what get Sixteen channels Subtract RC24 RC4O what get Sixteen channels Thats written invitation old friend 31M third-order intermodulation pay us visit Three transmitters separated equal numbers channels always invite 31M doesnt matter whether spacing 2 channels 20 problem same An intermodulation signal starts weak falls off rapidly distance Thats AMA Membership Manual recommends flight stations spaced 25 feet apart really need know about situation WK described Question #1 transmitters 25 feet apart Question #2 far transmitters receiver receiver transmitter listen will listen anything else sounds like transmitterin case spurious 31M signal FM transmitters 25 feet apart receiver 50 feet transmitters time some checking Heres good place start letter has summer date WK seem recall gets hot Florida summer Putting black plastic RC transmitter case hot sun can drastically change transmitters characteristics Most electronics technicians like work air-conditioned rooms can assume gold sticker radio went 750F Put thermometer inside black plastic case leave out midday sun knows what temperature will reach wouldnt surprised read 1500F Electronic circuits components dislike kind heat receiver suspect too doesnt like heat either wrapped up foam rubber cocoon stuffed airless room hot exhaust gases washing over wall would feel wrapped foam rubber sleeping bag set out summer sun Im exaggerating little make point Narrow-band equipment does good job treat right cant expect miracle under $200 have help along three people fly together lot should get another channellike RC33 instance hope hints will solve problem ers Editor Continued page 63 years have attracted up 100 entrants year mostly under- 14 age groups received good local media coverage think modeling community missing sure bet getting involved programs nature Along making contribution science education potential recruiting new young modelers other Guinness paper airplane record may interest readers indoor duration record 172 seconds held colleague fellow McDonnell FF club member Ken Blackburn record set indoors seems right down alley indoor HLG fliers Tom McAtee Hazeiwood Missouri Nats Critique Having attended five Nats Los Alamitos Riverside Lincoln Reno Westover can say affair far best organized highest quality ample support sanitation communication individual event direction present offer contestants good level playing field Casual gripes aside staff volunteers endless energy courteous help needed Kudos top bottom splendid job Any no-shows whatever reason should regret word spreads around AMA bashers will have shorter podium after constructive criticism two model people tend go internal time especially under contest stress consequently always best job explaining ourselves public would suggest simple event rules procedures placards posted venue table should large print written laymenlwomenFor example fascinated intense CL combat goingson quite up answering spectator questions about wins after midairs proposed signs could helpful recyclable year year Secondly mini-museum set up near HQ tent food area featuring facets AMA flight/sport activities would nicewith actual models static display comprehensive photo boards callouts Possibly difficult worthwhile fact would recommend expansion Nats onsite PR materials displays stuff available Finally videocassettes prior Nats good quality should available public 15 20 bucks think John Oldenkamp San Diego Cali fornia Ed note photos enjoyed November 1992 Nationals edition Model Aviation taken gifted photographer hardworking AMA member Thanks John giving us photo album event year--the Nationals Chicopee Continued page 170 CL Racing/Ballard Continued page 96 interior surfaces tank shown should give about 30-32 laps 9 x 7 APC prop aircraft can effectively block faster Bill Bischoff originated design has satisfied racers Texas area Golden Age air racing have flood letters requesting information Golden Age racers Enclosed month general aircraft requirements racing rules George McGinnis has sent some spectacular photos aircraft participants recent contest information available George McGinnis Hanson Hobby Inc 830 Main Street PO Box 150 Hanson MA 02341 call 617 293-2804 Rat Race piloting pilot walks smallest circle elapsed race time may reduced 5 15 seconds As races determined tenths second can difference between victory also-ran photo Howard Shahan Larry Dziak Jr shows both pilots leaning center circle positions make little passing especially airspeeds close Most rat races today won lost pits good pilot 5-second slower aircraft can effectively block faster competitor backwalking circle imposing additional pressure pit crew fast stop other area time saving shut down elapsed time three seconds can lost gliding extra unpowered lap slow approaches pitman Remember contest race preparation work saving time teams race performance will improve As always comments photos solicited Write address shown above uary1993 115
Edition: Model Aviation - 1993/01
Page Numbers: 96, 115
CONTROL LINE RACING s good uniflow-type fuel tank design Fox-Goldberg racing Bill Bischoff OOLPROOF profile tank As 52 popularity sportfFoxberg racing has dramatically increased have received numerous requests foolproof profile tank runs steadily quick fill delivers right number laps Various local restrictions mandate no fuel shutoffs A-in fill tubes improved uniflow tank design shown page sport racing FoxGoldberg racing uses K&S easy solder tin /8-in brass tubing Begin making copy full-size patterns Cut pieces out shears accurately possible Beginning overlap fold body tank along dotted line paper pattern will end up inboard side tank completed overlap will along top inboard side tank outside inboard surface Solder seam between overlap inboard side Bend front tank overlapping tabs fit outside Solder front punch holes fill overflow pickup using punch awl Dont drill holes awl will produce tabs result much stronger solder joints around tubes pickup tube about -in long ends up just inside tank fill overflow tubes also end just inside tank Both tubes must inboard pickup Unlike standard uniflow tanks isnt necessary cap either tubes flight results faster pit stops Before installing rear cover thoroughly wash flux residue Continued page 115 96 Model Aviation ard side Bottom Front Outboard side oFill up 0 TopBack Location Overlapfor overflow Bob Caddell grand champion shows off trophy Chester Jeep powered Fox 40 pylon engine Howard Shahan left Larry Dziak Jr Fast Rat final Howards airplane six Golden Age Racers readywas faster Larry won event time trials1991 Nats quick pit stops RC Flying Today/Myers Continued page 66 new narrow-band radios doesnt solve RC radio problems Dear George thought new narrow-band radios supposed cure problems So come receiver RC24 went nuts pits whenever two transmitters RC4O RC56 turned same time trans mitters FM receiver AM AM transmitter off time /s/W K Weinrich AMA 158422 Miami Springs FL Heres figure answer problem Take RC channel numbers question Subtract RC40 RC56 what get Sixteen channels Subtract RC24 RC4O what get Sixteen channels Thats written invitation old friend 31M third-order intermodulation pay us visit Three transmitters separated equal numbers channels always invite 31M doesnt matter whether spacing 2 channels 20 problem same An intermodulation signal starts weak falls off rapidly distance Thats AMA Membership Manual recommends flight stations spaced 25 feet apart really need know about situation WK described Question #1 transmitters 25 feet apart Question #2 far transmitters receiver receiver transmitter listen will listen anything else sounds like transmitterin case spurious 31M signal FM transmitters 25 feet apart receiver 50 feet transmitters time some checking Heres good place start letter has summer date WK seem recall gets hot Florida summer Putting black plastic RC transmitter case hot sun can drastically change transmitters characteristics Most electronics technicians like work air-conditioned rooms can assume gold sticker radio went 750F Put thermometer inside black plastic case leave out midday sun knows what temperature will reach wouldnt surprised read 1500F Electronic circuits components dislike kind heat receiver suspect too doesnt like heat either wrapped up foam rubber cocoon stuffed airless room hot exhaust gases washing over wall would feel wrapped foam rubber sleeping bag set out summer sun Im exaggerating little make point Narrow-band equipment does good job treat right cant expect miracle under $200 have help along three people fly together lot should get another channellike RC33 instance hope hints will solve problem ers Editor Continued page 63 years have attracted up 100 entrants year mostly under- 14 age groups received good local media coverage think modeling community missing sure bet getting involved programs nature Along making contribution science education potential recruiting new young modelers other Guinness paper airplane record may interest readers indoor duration record 172 seconds held colleague fellow McDonnell FF club member Ken Blackburn record set indoors seems right down alley indoor HLG fliers Tom McAtee Hazeiwood Missouri Nats Critique Having attended five Nats Los Alamitos Riverside Lincoln Reno Westover can say affair far best organized highest quality ample support sanitation communication individual event direction present offer contestants good level playing field Casual gripes aside staff volunteers endless energy courteous help needed Kudos top bottom splendid job Any no-shows whatever reason should regret word spreads around AMA bashers will have shorter podium after constructive criticism two model people tend go internal time especially under contest stress consequently always best job explaining ourselves public would suggest simple event rules procedures placards posted venue table should large print written laymenlwomenFor example fascinated intense CL combat goingson quite up answering spectator questions about wins after midairs proposed signs could helpful recyclable year year Secondly mini-museum set up near HQ tent food area featuring facets AMA flight/sport activities would nicewith actual models static display comprehensive photo boards callouts Possibly difficult worthwhile fact would recommend expansion Nats onsite PR materials displays stuff available Finally videocassettes prior Nats good quality should available public 15 20 bucks think John Oldenkamp San Diego Cali fornia Ed note photos enjoyed November 1992 Nationals edition Model Aviation taken gifted photographer hardworking AMA member Thanks John giving us photo album event year--the Nationals Chicopee Continued page 170 CL Racing/Ballard Continued page 96 interior surfaces tank shown should give about 30-32 laps 9 x 7 APC prop aircraft can effectively block faster Bill Bischoff originated design has satisfied racers Texas area Golden Age air racing have flood letters requesting information Golden Age racers Enclosed month general aircraft requirements racing rules George McGinnis has sent some spectacular photos aircraft participants recent contest information available George McGinnis Hanson Hobby Inc 830 Main Street PO Box 150 Hanson MA 02341 call 617 293-2804 Rat Race piloting pilot walks smallest circle elapsed race time may reduced 5 15 seconds As races determined tenths second can difference between victory also-ran photo Howard Shahan Larry Dziak Jr shows both pilots leaning center circle positions make little passing especially airspeeds close Most rat races today won lost pits good pilot 5-second slower aircraft can effectively block faster competitor backwalking circle imposing additional pressure pit crew fast stop other area time saving shut down elapsed time three seconds can lost gliding extra unpowered lap slow approaches pitman Remember contest race preparation work saving time teams race performance will improve As always comments photos solicited Write address shown above uary1993 115