George M hlyers PEOPLE Ive talked have helped learn discuss two subjects columns additional thoughts get lost column folds over back magazine So will try keep down two subjects per column now DIGITS & DATA Electric-powered models dont perform well theyre too heavy Working should cause modeler gain strong interest weight control Some modelers have purchased Pelouze PE5 Digital Postal Scale weigh model parts price about $60 weighs objects up five pounds indicates weight either grams ounces touch button shuts itself off after few minutes save battery accurate enough weigh servo 10 15 grams simple way find out get handful copper dimes 1965 present date weigh Dimes nice because odd weight lets us investigate roundoff cutoff range electronic scale dime weighs 2268 grams Superficial wear has negligible effect weight Add dime time scale write down indicated weight plot curve results trend isnt straight line machine has problem linearity trend line straight goes wrong place machine has problem scaling factor and/or offset zero Dont surprised scales readout either doesnt change add coin jumps couple numbers coin put data spreadsheet Lotus 1-2-3 let plot graph perform regression regression looks actual weight function indicated weight shows trend line starts about 1/2 gram high counts less % error Constant Std Err Y Est R Squared No Observations Degrees Freedom X Coefficients Std Error Coef Regression Output 049257 0683 122 0997935 25 23 1003524 0009516 An internal computer feeds PE5 digital display Some computers round off remainders some computers subtend chop off remainders either case least significant digit the right has incorrect PE5 scale seems use round off computer because actual weights fall both above below trend line difference between actual indicated weight varies rams Therefore scale reading 10 grams really means anything 95 115 grams Try get odd number PE5s grams display cant machine counts 2s gram scale creates large error small weights 100% error 2 grams diminishes value found regression 035% indicated weight plus 049 gram high end range 2-gram ambiguity exists everywhere measuring range PE5s computer has automatic adjustment zero can play tricks too put box paper clips scale one number never changed zero dumped whole boxful scale time read 50 grams makes difference put weight scale conclusion cant weigh servo scale least cant weigh accurately enough differentiate Airtronics Futaba RCD etc microservos can weigh things heavier Leroy Satterlee AVP AMA District 7 launches Antic Bipe Ace Float Fly 92 Site Higginsville Missouri ary1993 65 ftC Flyirmg Tdiy 70 Froehlich Farm Road Hicksville NY 11801 Tom Hunts twin-Electric two 05s scale rendition Argentine-made Pucara counterinsurgency aircraft good flier Kress Jets 4308 Ulster Landing Road Saugerties NY 12477 offers either semikit plans plus plastic nacelles canopy nose cone full kit Tom SEFLI club member two ounces 567 gramsa rounded number error will tolerable 5% less wouldnt use decide between stamp two letter Now really want weigh servo letter easy way bright new 1992 quarter weighs 5670 grams Get Also get piece -in-sq balsa foot long Put loop thread around Hold onto loop slide along stick until balsa balances level Zap ioop place Glue quarter end balsa Measure distance center thickness quarter place thread Zapped Im going assume exactly six inches though doesnt have reference number balance will Reference Weight x Reference Distance x 6 equation marking balance use quarter D /W where D distance support loop inches W weight unknown grams Beam Balance Sketch 1-4-Support Loop Thread 6 [-I areaIsoStioI Ouafler tJflkOOwO Weight 4W use quarter grams scale Weightingr6 78 910 11 12 Distance in 567 487 425 378 340 309 284 Weightingr 13 14 15 16 17 18 19 20 Distance in 262 243227 212 208 189 179 170 Weight gr 21 22 23 24 25 26 27 28 Distance in 162 155 148 142 136 131 126 122 Avoirdupois ounce weighs 28349527 grams use two quarters grams scale Two QuartersOne Stamp Weight oz 050 060 070 080 090 100 110 120 Distance in 480 480 343 300 267 240 218 200 Two QuartersTwo Stamps Weight oz 130 140 150 1601 70 1801 90 200 Distance in 185 171 160 1501 41 1371 26 120 use two quarters first grams scale numbers doubled resulting scale range nicely differentiates between two stamps letter Remember postal rates stepped Everything up ounce costs 29 [this week least] first class letter Any part additional ounce costs another 23g weighing six grams less use penny 1992 penny weighs 2500 grams reference number will 15 know calculate new weight scale lazy can computer using BASIC program tncluded layout column checks out current US coin gives scales either grams ounces penny will weigh things 3 10 grams nickel covers range 5 20 grams quarter covers 6 28 grams half dollar covers 12 45 grams dollar coin silver dollarone recent ones copper core recent Susan B Anthony dollars about size quarter covers 27 about 100 grams could Ill RIC Idfr-Bar Glow Plugs Long Short$209 Also.Only Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $169 Swanson Associates PO Box 151 Wayne NJ c 7948 07470 use 1 24 8 quarters etc weigh up 2 4 8 16 ounces using same scale going latter use 35mm film container hold quarters build stronger beam beam balance will accurate US Mint ruler measured whole thing will cost about dollar hour time Interested OLD FRIEND PAYS VISIT recently received following letter should serve remind us using Continued page 115 66 Model Aviation C program calculate scales beam balance have print out printer make global substitution LPRINT PRINT 10 INPUT 1992 PENNY NICKEL DIME QUARTER HALF OR 1971-78 Cu DOLLAR P N D 0 H XA$ 20 IF A$P OR A$p THEN R25 C$PENNY GOTO 80 30 IF A$N OR A$n THEN R5 C$NICKEL GOTO 80 40 IF A$D OR ASd THEN R2268 C$DIME GOTO 80 50 IF A$Q OR A$q THEN R567 C$QUARTER GOTO 80 60 IF A$H OR A$h THEN R11 34 C$HALF DOLLAR GOTO 80 70 IF A$X OR A$x THEN R2268 C$DOLLAR COIN 80 INPUT GRAMS G OR OUNCES 0 AvpA$ 90 IF A$G OR A$g THEN B$GRAMS 100 IF A$O OR A$a THEN B$OZ 110 PRINT 120 PRINT 0$ INCHES 130 IF A$O OR A$o GOTO 230 140 REM COMPUTE GRAMS SCALE 150 FOR W1 TO 300 STEP 1 150 D6*R/W 170 IF D6 THEN 210 180 IF D15 THEN 210 190 PRINT USING ####W 200 PRINT USING NEXT W 220 GOTO 10 230 REM COMPUTE OUNCES SCALE 240 FOR W1 TO 30 STEP 1 250 D66R/ W*28349527# 260 IF D6 THEN 300 270 IF D15 THEN 300 280 PRINT USING ####W 290 PRINT USING NEXT W 310 GOTO 10 DRA GONEL Y NEW FLY ANYWHERE *DIE CUT PARTS ONLY 95 72 WING SPAN$39 * ALL SALSA CONSTRUCTION * REQUIRES 2 CHANNEL RADIO & 049 074 ENGINE ADD 1400 SHIPPING & HANDLING KY 55SIDBNTS ADD 6% SALES TAX ZEPPELIN MODELS INC 3509 JANELL RD LOUISVILLE KY 40216 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: 65, 66, 115
George M hlyers PEOPLE Ive talked have helped learn discuss two subjects columns additional thoughts get lost column folds over back magazine So will try keep down two subjects per column now DIGITS & DATA Electric-powered models dont perform well theyre too heavy Working should cause modeler gain strong interest weight control Some modelers have purchased Pelouze PE5 Digital Postal Scale weigh model parts price about $60 weighs objects up five pounds indicates weight either grams ounces touch button shuts itself off after few minutes save battery accurate enough weigh servo 10 15 grams simple way find out get handful copper dimes 1965 present date weigh Dimes nice because odd weight lets us investigate roundoff cutoff range electronic scale dime weighs 2268 grams Superficial wear has negligible effect weight Add dime time scale write down indicated weight plot curve results trend isnt straight line machine has problem linearity trend line straight goes wrong place machine has problem scaling factor and/or offset zero Dont surprised scales readout either doesnt change add coin jumps couple numbers coin put data spreadsheet Lotus 1-2-3 let plot graph perform regression regression looks actual weight function indicated weight shows trend line starts about 1/2 gram high counts less % error Constant Std Err Y Est R Squared No Observations Degrees Freedom X Coefficients Std Error Coef Regression Output 049257 0683 122 0997935 25 23 1003524 0009516 An internal computer feeds PE5 digital display Some computers round off remainders some computers subtend chop off remainders either case least significant digit the right has incorrect PE5 scale seems use round off computer because actual weights fall both above below trend line difference between actual indicated weight varies rams Therefore scale reading 10 grams really means anything 95 115 grams Try get odd number PE5s grams display cant machine counts 2s gram scale creates large error small weights 100% error 2 grams diminishes value found regression 035% indicated weight plus 049 gram high end range 2-gram ambiguity exists everywhere measuring range PE5s computer has automatic adjustment zero can play tricks too put box paper clips scale one number never changed zero dumped whole boxful scale time read 50 grams makes difference put weight scale conclusion cant weigh servo scale least cant weigh accurately enough differentiate Airtronics Futaba RCD etc microservos can weigh things heavier Leroy Satterlee AVP AMA District 7 launches Antic Bipe Ace Float Fly 92 Site Higginsville Missouri ary1993 65 ftC Flyirmg Tdiy 70 Froehlich Farm Road Hicksville NY 11801 Tom Hunts twin-Electric two 05s scale rendition Argentine-made Pucara counterinsurgency aircraft good flier Kress Jets 4308 Ulster Landing Road Saugerties NY 12477 offers either semikit plans plus plastic nacelles canopy nose cone full kit Tom SEFLI club member two ounces 567 gramsa rounded number error will tolerable 5% less wouldnt use decide between stamp two letter Now really want weigh servo letter easy way bright new 1992 quarter weighs 5670 grams Get Also get piece -in-sq balsa foot long Put loop thread around Hold onto loop slide along stick until balsa balances level Zap ioop place Glue quarter end balsa Measure distance center thickness quarter place thread Zapped Im going assume exactly six inches though doesnt have reference number balance will Reference Weight x Reference Distance x 6 equation marking balance use quarter D /W where D distance support loop inches W weight unknown grams Beam Balance Sketch 1-4-Support Loop Thread 6 [-I areaIsoStioI Ouafler tJflkOOwO Weight 4W use quarter grams scale Weightingr6 78 910 11 12 Distance in 567 487 425 378 340 309 284 Weightingr 13 14 15 16 17 18 19 20 Distance in 262 243227 212 208 189 179 170 Weight gr 21 22 23 24 25 26 27 28 Distance in 162 155 148 142 136 131 126 122 Avoirdupois ounce weighs 28349527 grams use two quarters grams scale Two QuartersOne Stamp Weight oz 050 060 070 080 090 100 110 120 Distance in 480 480 343 300 267 240 218 200 Two QuartersTwo Stamps Weight oz 130 140 150 1601 70 1801 90 200 Distance in 185 171 160 1501 41 1371 26 120 use two quarters first grams scale numbers doubled resulting scale range nicely differentiates between two stamps letter Remember postal rates stepped Everything up ounce costs 29 [this week least] first class letter Any part additional ounce costs another 23g weighing six grams less use penny 1992 penny weighs 2500 grams reference number will 15 know calculate new weight scale lazy can computer using BASIC program tncluded layout column checks out current US coin gives scales either grams ounces penny will weigh things 3 10 grams nickel covers range 5 20 grams quarter covers 6 28 grams half dollar covers 12 45 grams dollar coin silver dollarone recent ones copper core recent Susan B Anthony dollars about size quarter covers 27 about 100 grams could Ill RIC Idfr-Bar Glow Plugs Long Short$209 Also.Only Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $169 Swanson Associates PO Box 151 Wayne NJ c 7948 07470 use 1 24 8 quarters etc weigh up 2 4 8 16 ounces using same scale going latter use 35mm film container hold quarters build stronger beam beam balance will accurate US Mint ruler measured whole thing will cost about dollar hour time Interested OLD FRIEND PAYS VISIT recently received following letter should serve remind us using Continued page 115 66 Model Aviation C program calculate scales beam balance have print out printer make global substitution LPRINT PRINT 10 INPUT 1992 PENNY NICKEL DIME QUARTER HALF OR 1971-78 Cu DOLLAR P N D 0 H XA$ 20 IF A$P OR A$p THEN R25 C$PENNY GOTO 80 30 IF A$N OR A$n THEN R5 C$NICKEL GOTO 80 40 IF A$D OR ASd THEN R2268 C$DIME GOTO 80 50 IF A$Q OR A$q THEN R567 C$QUARTER GOTO 80 60 IF A$H OR A$h THEN R11 34 C$HALF DOLLAR GOTO 80 70 IF A$X OR A$x THEN R2268 C$DOLLAR COIN 80 INPUT GRAMS G OR OUNCES 0 AvpA$ 90 IF A$G OR A$g THEN B$GRAMS 100 IF A$O OR A$a THEN B$OZ 110 PRINT 120 PRINT 0$ INCHES 130 IF A$O OR A$o GOTO 230 140 REM COMPUTE GRAMS SCALE 150 FOR W1 TO 300 STEP 1 150 D6*R/W 170 IF D6 THEN 210 180 IF D15 THEN 210 190 PRINT USING ####W 200 PRINT USING NEXT W 220 GOTO 10 230 REM COMPUTE OUNCES SCALE 240 FOR W1 TO 30 STEP 1 250 D66R/ W*28349527# 260 IF D6 THEN 300 270 IF D15 THEN 300 280 PRINT USING ####W 290 PRINT USING NEXT W 310 GOTO 10 DRA GONEL Y NEW FLY ANYWHERE *DIE CUT PARTS ONLY 95 72 WING SPAN$39 * ALL SALSA CONSTRUCTION * REQUIRES 2 CHANNEL RADIO & 049 074 ENGINE ADD 1400 SHIPPING & HANDLING KY 55SIDBNTS ADD 6% SALES TAX ZEPPELIN MODELS INC 3509 JANELL RD LOUISVILLE KY 40216 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: 65, 66, 115
George M hlyers PEOPLE Ive talked have helped learn discuss two subjects columns additional thoughts get lost column folds over back magazine So will try keep down two subjects per column now DIGITS & DATA Electric-powered models dont perform well theyre too heavy Working should cause modeler gain strong interest weight control Some modelers have purchased Pelouze PE5 Digital Postal Scale weigh model parts price about $60 weighs objects up five pounds indicates weight either grams ounces touch button shuts itself off after few minutes save battery accurate enough weigh servo 10 15 grams simple way find out get handful copper dimes 1965 present date weigh Dimes nice because odd weight lets us investigate roundoff cutoff range electronic scale dime weighs 2268 grams Superficial wear has negligible effect weight Add dime time scale write down indicated weight plot curve results trend isnt straight line machine has problem linearity trend line straight goes wrong place machine has problem scaling factor and/or offset zero Dont surprised scales readout either doesnt change add coin jumps couple numbers coin put data spreadsheet Lotus 1-2-3 let plot graph perform regression regression looks actual weight function indicated weight shows trend line starts about 1/2 gram high counts less % error Constant Std Err Y Est R Squared No Observations Degrees Freedom X Coefficients Std Error Coef Regression Output 049257 0683 122 0997935 25 23 1003524 0009516 An internal computer feeds PE5 digital display Some computers round off remainders some computers subtend chop off remainders either case least significant digit the right has incorrect PE5 scale seems use round off computer because actual weights fall both above below trend line difference between actual indicated weight varies rams Therefore scale reading 10 grams really means anything 95 115 grams Try get odd number PE5s grams display cant machine counts 2s gram scale creates large error small weights 100% error 2 grams diminishes value found regression 035% indicated weight plus 049 gram high end range 2-gram ambiguity exists everywhere measuring range PE5s computer has automatic adjustment zero can play tricks too put box paper clips scale one number never changed zero dumped whole boxful scale time read 50 grams makes difference put weight scale conclusion cant weigh servo scale least cant weigh accurately enough differentiate Airtronics Futaba RCD etc microservos can weigh things heavier Leroy Satterlee AVP AMA District 7 launches Antic Bipe Ace Float Fly 92 Site Higginsville Missouri ary1993 65 ftC Flyirmg Tdiy 70 Froehlich Farm Road Hicksville NY 11801 Tom Hunts twin-Electric two 05s scale rendition Argentine-made Pucara counterinsurgency aircraft good flier Kress Jets 4308 Ulster Landing Road Saugerties NY 12477 offers either semikit plans plus plastic nacelles canopy nose cone full kit Tom SEFLI club member two ounces 567 gramsa rounded number error will tolerable 5% less wouldnt use decide between stamp two letter Now really want weigh servo letter easy way bright new 1992 quarter weighs 5670 grams Get Also get piece -in-sq balsa foot long Put loop thread around Hold onto loop slide along stick until balsa balances level Zap ioop place Glue quarter end balsa Measure distance center thickness quarter place thread Zapped Im going assume exactly six inches though doesnt have reference number balance will Reference Weight x Reference Distance x 6 equation marking balance use quarter D /W where D distance support loop inches W weight unknown grams Beam Balance Sketch 1-4-Support Loop Thread 6 [-I areaIsoStioI Ouafler tJflkOOwO Weight 4W use quarter grams scale Weightingr6 78 910 11 12 Distance in 567 487 425 378 340 309 284 Weightingr 13 14 15 16 17 18 19 20 Distance in 262 243227 212 208 189 179 170 Weight gr 21 22 23 24 25 26 27 28 Distance in 162 155 148 142 136 131 126 122 Avoirdupois ounce weighs 28349527 grams use two quarters grams scale Two QuartersOne Stamp Weight oz 050 060 070 080 090 100 110 120 Distance in 480 480 343 300 267 240 218 200 Two QuartersTwo Stamps Weight oz 130 140 150 1601 70 1801 90 200 Distance in 185 171 160 1501 41 1371 26 120 use two quarters first grams scale numbers doubled resulting scale range nicely differentiates between two stamps letter Remember postal rates stepped Everything up ounce costs 29 [this week least] first class letter Any part additional ounce costs another 23g weighing six grams less use penny 1992 penny weighs 2500 grams reference number will 15 know calculate new weight scale lazy can computer using BASIC program tncluded layout column checks out current US coin gives scales either grams ounces penny will weigh things 3 10 grams nickel covers range 5 20 grams quarter covers 6 28 grams half dollar covers 12 45 grams dollar coin silver dollarone recent ones copper core recent Susan B Anthony dollars about size quarter covers 27 about 100 grams could Ill RIC Idfr-Bar Glow Plugs Long Short$209 Also.Only Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $169 Swanson Associates PO Box 151 Wayne NJ c 7948 07470 use 1 24 8 quarters etc weigh up 2 4 8 16 ounces using same scale going latter use 35mm film container hold quarters build stronger beam beam balance will accurate US Mint ruler measured whole thing will cost about dollar hour time Interested OLD FRIEND PAYS VISIT recently received following letter should serve remind us using Continued page 115 66 Model Aviation C program calculate scales beam balance have print out printer make global substitution LPRINT PRINT 10 INPUT 1992 PENNY NICKEL DIME QUARTER HALF OR 1971-78 Cu DOLLAR P N D 0 H XA$ 20 IF A$P OR A$p THEN R25 C$PENNY GOTO 80 30 IF A$N OR A$n THEN R5 C$NICKEL GOTO 80 40 IF A$D OR ASd THEN R2268 C$DIME GOTO 80 50 IF A$Q OR A$q THEN R567 C$QUARTER GOTO 80 60 IF A$H OR A$h THEN R11 34 C$HALF DOLLAR GOTO 80 70 IF A$X OR A$x THEN R2268 C$DOLLAR COIN 80 INPUT GRAMS G OR OUNCES 0 AvpA$ 90 IF A$G OR A$g THEN B$GRAMS 100 IF A$O OR A$a THEN B$OZ 110 PRINT 120 PRINT 0$ INCHES 130 IF A$O OR A$o GOTO 230 140 REM COMPUTE GRAMS SCALE 150 FOR W1 TO 300 STEP 1 150 D6*R/W 170 IF D6 THEN 210 180 IF D15 THEN 210 190 PRINT USING ####W 200 PRINT USING NEXT W 220 GOTO 10 230 REM COMPUTE OUNCES SCALE 240 FOR W1 TO 30 STEP 1 250 D66R/ W*28349527# 260 IF D6 THEN 300 270 IF D15 THEN 300 280 PRINT USING ####W 290 PRINT USING NEXT W 310 GOTO 10 DRA GONEL Y NEW FLY ANYWHERE *DIE CUT PARTS ONLY 95 72 WING SPAN$39 * ALL SALSA CONSTRUCTION * REQUIRES 2 CHANNEL RADIO & 049 074 ENGINE ADD 1400 SHIPPING & HANDLING KY 55SIDBNTS ADD 6% SALES TAX ZEPPELIN MODELS INC 3509 JANELL RD LOUISVILLE KY 40216 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