CONTROL LINE RACING ENGINE TESTING Sooner later competition fliers get around trying evaluate compare engines bench test stand use shown photograph enables obtain tachometer readings keeping both hands free adjust engine important Racing dieselsthey run very steadily high rpm bench often require lot back-and-forth dialing compression mixture get peak reading take credit designI saw John McCollums shop flashlight tachometer use Futaba Tachotimer both held front engine angled reflect detect off lower portion propeller arc angles particularly critical bar holding flashlight tachometer swings up out way engine starting test stand mounted corner bench can stand behind side engine safe-and-convenient position read tachometer adjusting engine get meaningful results static testing have careful control least take account significant variables First need dedicated test propeller used tests given engine size rpm produced test prop should simulate in-flight rpm usual flying prop ie static rpm flying prop plus approximately 10% Rather cut down flying prop start fiberglass prop larger diameter lower pitch cut down until rpm right range will give thick stubby club will last over years Changes atmospheric pressure humidity particularly air temperature alter amount oxygen available given volume air can affect engine performance significantly best way exclude weather variables have dedicated control engine run test session establish baseline comparison engine under test also good way rule out variables such new batch fuel have individual engine want hop-up run modify run again within hour offset atmospheric variables wait until another day wont know whether 300 rpm boost due secret engine modification faster weather Finally keep detailed log test results notebook future reference Unfortunately everything done very scientifically will still find some engines perform poorly bench outstanding flight-tested bottom line possible fully duplicate flight performance static testingsome engines unload better others air dont give up engine until have tried airplane Contest Flying time could enter event local Racing contest plan flying least two races things working well could count final feature race well Nowadays contests seem have just feature-length race per event Blow plug flood engine youve lost whole contest right questioned about situation Contest Director usually says something like Only four guys entered event arent going bother running heats pressed further management usually follows rules progressive retrenchment Anyway weve got three other events run before dark isnt time bottom line however often contest needs different events obtain AAA ratingand thus retain its exclusive status average racer left prospect single hit adrenalin lot spectating flying multiple events latter seems appeal some fact life will hard-pressed get top Racing unless concentrate event two try fly will diluting effort will never reach full potential Strips carbon fiber help reinforce weakest part Profile racers fuselage between wing stabilizer October1996 129 engine test stand has tachometer flashlight mounted arm swings up out way engine starting WINGCARBON FIBER Willoughby/Oge rotary Goodyear shutoff Send SASE address top column construction drawings NEED SCALE DOCUMENTATION Antiques Military Civilian Helicopters Sailpianes wids kirgest aircraft documentation collection 5800 different Full color photo studies 1905-1996 33000 3-view line drawings New 1996 Catalog/Guide 188 pages Canada/Mexico $1000 Bob Only $8 Overseas $1500 Banka s Scale Model Research 3114 Yukon Avenue a Mesa CA 92626 79-8058 Look us net I. 1 4338 Austin Blvd Island Park NY 11558 516-431-4127 516-889-2682 FEATURING UTEWEJGHT EMT CONDUIT TUBING K LOCK ON FITTiNGS NO TOOL 0 FiNCLUDEfl I3/4II BxlO$85$130I lOslO$100$135I BREAKDOWN MODEL Fits Cars & Can Shipped UPS Add Amounts Below unit Price BxlO & lOslO Fiat $40 3/4 & $45 1 BxlO & lOslO Peaked 435 3/4 & $45 1 10x20 Fiat 664 3/4 & $73 1 10x20 Peaked 582 11 FVINCLUOE1 3/4 1 I dO $80 SIlO I lOslo $85 $115 3/4-6003/4-6O03/4 6 503/4-4 003/4 6003/4-650 3/4-750 1-800l4O0I 900I 5001 800 1-900 1-10O0 P4LP40P5FFOOT PAD F03FOLBUNGlE 6 40 3/4-6003/4-6503/4 7503/48503/4 6003/4-600845e l-9001-9001 10001 7501 800l-800ii WF MAFAJFACTTJRE & STOO SEvER AL OTHER SYSTEMS & HAVE FIJI LHE OF ACCESSORIES ALL WITH THE VFNOOR H MM CALL FAX OR MAE US TO PLACE YOUR ORDER OR TO RECErIE YOUR FREE CATALOG further aspect race event lack incentive push limits try something new have two separate heats can take easy post time Heat raise compression ratio try /3-lap pit stops second heat risking contest Heats should flown rounds back-to-back-I think latter system conceived contest management benefit alone Racing community US has spread itself too thin among too events time has come try singleevent specialty contests AMA Racing department-store-type contests currently available really meet need about four heat races Scale Racing Slow Rat two best times taken compute winner number heats flown could vary number contestantswith fewer entrants would time run heats would actually fly races turnout low kind contest popular Combat has worked very well FAI Team Race dont know anyone has flown Kean Smiths US Team Race Champs FAI Team Trials has enjoyed opportunity fly lot races Profile Construction diagram shows lightweight-but-effective way strengthen weakest part Profile racers fuselage between wing stab use four strips 014 X /2inch carbon-fiber laminate Magnalite Bob Violett Models Scale Racing models Adding strips above below wing stab shown best way have found stop cracks developing highly stressed joints Giants Help Promote IMsmUad INonCompetitiveI lHIGEw ng Large RIC Air Craft I I IMAA membership includes quarterly magazine High Flight I MEMBEHIPAPPLICAON r N L Dctte19I Yearly Dues$1500 USA $2000 US Canada & Mexico $j~3 US ElsewhereI Make CHECK MONEY ORDER Payable INTERNATIONAL MINIAlURE AIRCRAFT ASSOCIATION INC I Name ____________________________ Phone __________________ I rt ______________________________________ P0 Box/Roijte Box ________________ I _________________________Ste/Province __________________Zip __________________ 1Ctty_________ IMAA _______ AMA Number________ MAAC _______Chapter_______ L TO IMAA Secretary DON E VINEYARD S HilIdale Road a KS 67401I 130 Model Aviation Y_ POP UP CANOPIES $29900 lOxlO LIGHTWEIGHT $39900 lOxlO HEAVYWEIGHT SelsUp LessThan 30 Seconds No Tools Required Other Sizes 8x8 10x15 10x20
Edition: Model Aviation - 1996/10
Page Numbers: 129, 130
CONTROL LINE RACING ENGINE TESTING Sooner later competition fliers get around trying evaluate compare engines bench test stand use shown photograph enables obtain tachometer readings keeping both hands free adjust engine important Racing dieselsthey run very steadily high rpm bench often require lot back-and-forth dialing compression mixture get peak reading take credit designI saw John McCollums shop flashlight tachometer use Futaba Tachotimer both held front engine angled reflect detect off lower portion propeller arc angles particularly critical bar holding flashlight tachometer swings up out way engine starting test stand mounted corner bench can stand behind side engine safe-and-convenient position read tachometer adjusting engine get meaningful results static testing have careful control least take account significant variables First need dedicated test propeller used tests given engine size rpm produced test prop should simulate in-flight rpm usual flying prop ie static rpm flying prop plus approximately 10% Rather cut down flying prop start fiberglass prop larger diameter lower pitch cut down until rpm right range will give thick stubby club will last over years Changes atmospheric pressure humidity particularly air temperature alter amount oxygen available given volume air can affect engine performance significantly best way exclude weather variables have dedicated control engine run test session establish baseline comparison engine under test also good way rule out variables such new batch fuel have individual engine want hop-up run modify run again within hour offset atmospheric variables wait until another day wont know whether 300 rpm boost due secret engine modification faster weather Finally keep detailed log test results notebook future reference Unfortunately everything done very scientifically will still find some engines perform poorly bench outstanding flight-tested bottom line possible fully duplicate flight performance static testingsome engines unload better others air dont give up engine until have tried airplane Contest Flying time could enter event local Racing contest plan flying least two races things working well could count final feature race well Nowadays contests seem have just feature-length race per event Blow plug flood engine youve lost whole contest right questioned about situation Contest Director usually says something like Only four guys entered event arent going bother running heats pressed further management usually follows rules progressive retrenchment Anyway weve got three other events run before dark isnt time bottom line however often contest needs different events obtain AAA ratingand thus retain its exclusive status average racer left prospect single hit adrenalin lot spectating flying multiple events latter seems appeal some fact life will hard-pressed get top Racing unless concentrate event two try fly will diluting effort will never reach full potential Strips carbon fiber help reinforce weakest part Profile racers fuselage between wing stabilizer October1996 129 engine test stand has tachometer flashlight mounted arm swings up out way engine starting WINGCARBON FIBER Willoughby/Oge rotary Goodyear shutoff Send SASE address top column construction drawings NEED SCALE DOCUMENTATION Antiques Military Civilian Helicopters Sailpianes wids kirgest aircraft documentation collection 5800 different Full color photo studies 1905-1996 33000 3-view line drawings New 1996 Catalog/Guide 188 pages Canada/Mexico $1000 Bob Only $8 Overseas $1500 Banka s Scale Model Research 3114 Yukon Avenue a Mesa CA 92626 79-8058 Look us net I. 1 4338 Austin Blvd Island Park NY 11558 516-431-4127 516-889-2682 FEATURING UTEWEJGHT EMT CONDUIT TUBING K LOCK ON FITTiNGS NO TOOL 0 FiNCLUDEfl I3/4II BxlO$85$130I lOslO$100$135I BREAKDOWN MODEL Fits Cars & Can Shipped UPS Add Amounts Below unit Price BxlO & lOslO Fiat $40 3/4 & $45 1 BxlO & lOslO Peaked 435 3/4 & $45 1 10x20 Fiat 664 3/4 & $73 1 10x20 Peaked 582 11 FVINCLUOE1 3/4 1 I dO $80 SIlO I lOslo $85 $115 3/4-6003/4-6O03/4 6 503/4-4 003/4 6003/4-650 3/4-750 1-800l4O0I 900I 5001 800 1-900 1-10O0 P4LP40P5FFOOT PAD F03FOLBUNGlE 6 40 3/4-6003/4-6503/4 7503/48503/4 6003/4-600845e l-9001-9001 10001 7501 800l-800ii WF MAFAJFACTTJRE & STOO SEvER AL OTHER SYSTEMS & HAVE FIJI LHE OF ACCESSORIES ALL WITH THE VFNOOR H MM CALL FAX OR MAE US TO PLACE YOUR ORDER OR TO RECErIE YOUR FREE CATALOG further aspect race event lack incentive push limits try something new have two separate heats can take easy post time Heat raise compression ratio try /3-lap pit stops second heat risking contest Heats should flown rounds back-to-back-I think latter system conceived contest management benefit alone Racing community US has spread itself too thin among too events time has come try singleevent specialty contests AMA Racing department-store-type contests currently available really meet need about four heat races Scale Racing Slow Rat two best times taken compute winner number heats flown could vary number contestantswith fewer entrants would time run heats would actually fly races turnout low kind contest popular Combat has worked very well FAI Team Race dont know anyone has flown Kean Smiths US Team Race Champs FAI Team Trials has enjoyed opportunity fly lot races Profile Construction diagram shows lightweight-but-effective way strengthen weakest part Profile racers fuselage between wing stab use four strips 014 X /2inch carbon-fiber laminate Magnalite Bob Violett Models Scale Racing models Adding strips above below wing stab shown best way have found stop cracks developing highly stressed joints Giants Help Promote IMsmUad INonCompetitiveI lHIGEw ng Large RIC Air Craft I I IMAA membership includes quarterly magazine High Flight I MEMBEHIPAPPLICAON r N L Dctte19I Yearly Dues$1500 USA $2000 US Canada & Mexico $j~3 US ElsewhereI Make CHECK MONEY ORDER Payable INTERNATIONAL MINIAlURE AIRCRAFT ASSOCIATION INC I Name ____________________________ Phone __________________ I rt ______________________________________ P0 Box/Roijte Box ________________ I _________________________Ste/Province __________________Zip __________________ 1Ctty_________ IMAA _______ AMA Number________ MAAC _______Chapter_______ L TO IMAA Secretary DON E VINEYARD S HilIdale Road a KS 67401I 130 Model Aviation Y_ POP UP CANOPIES $29900 lOxlO LIGHTWEIGHT $39900 lOxlO HEAVYWEIGHT SelsUp LessThan 30 Seconds No Tools Required Other Sizes 8x8 10x15 10x20