CONTROL LINE SPEED TURBOJETS Most have probably seen write-ups advertisements maybe demonstrations small turbojet engines modelers have trying RC Scale airplanes what have read early engines required rather complicated starting system other problems such fuel fuel tanks safety concerns took crew several persons start just like full-scale jet engines Newer versions have improved simplified until can started operated person saw demonstration flight Nats impressive say least sound just like full-scale jet thrust speed outstanding Some us Speed fliers wondered would fly Control Line realized might little too large too powerful Theres new turbojet engine available 43 inches diameter weighs just 265 ounces puts out 75 lb thrust rotor speed 100000 rpm enough fly Control Line-size models Can fly Turbojet Speed might awhile can seriously think using such engine CL Scale now tiny turbojet built company called Golden West Models based Kurt Schrecklings design model aircraft put production Schneider-Sanchez Austria Recently Engineering News magazine short write-up several engines put out 75 100 lb thrust range 265 oz 16 lb Golden West Models FD 3/67 LS engine small made exotic metals such Inconel titanium stainless steel has punched blades curvature instead machined- welded-turbines patented electronic control regulates fuel flow depending input exhaust gas temperature sensor engine tachometer throttle setting second patent covers fuel vaporization system carries kerosene-Coleman gas through /I6inch-diameter Inconel tubing combustion chamber engine cost reported $2995 can just see future nowJet Carrier Jet Aerobatics Jet Racing Jet Combat Talk about Top Gun Cold Cash Speed Bash Last September competed 50th Anniversary Speed Contest hosted Dayton Buzzin Buzzards Harry Roe avid Speed flier has around forever found flyers very first Dayton contest held 1947 Control Line modeling still new rules still formative stage Speed consisted five classes starting engines 10 maximum displacement progressing 20 30 40 50 60 Soon settled down Class 19s Class B 29s Class C 49s Class D 60s someone found out 60-size engines little over 60 size limit Class D size raised 65 weve stuck ever since Dayton contest always scheduled second weekend September usually blessed excellent weather hurricane came up Florida headed straight Dayton year veered east just enough miss us Heavy rains fell just east north Dayton Cleveland clobbered flew Speed hearts content day Saturday Sunday Some fliers didnt come because thought storm would hit turnout good anyway 32 contestants 74 entries 125 official flights turned attempts averaged out flight attempt five minutes 42 seconds Frank Puleo drove way Denver Colorado figured worth set new 21 Sport Speed Record 15484 mph Class record fell three times Tommy Brown flew sidewinder monoline past old record Billy Hughes flew faster Tommy went up again new mark 18665 mph Billy went through three engines bearings couldnt hold up test flight 196 mph Thats moving 15-size airplane Speed Model Design Bob Whitney Florida flies Racing Speed events suggested some good topics column Design parameters such leadout position airfoil shape balance always apparent beginners March 1997 141 Junior King operates starter brother Ed holds 21 Proto Flies backward clockwise lines kept tight torque Denvers Frank Puleo set 21 Sport Speed Bob Whitney drove Dayton Florida record 15484 mph Dayton fly Speedconverted AMA number Indy 21 Ned Morris Indianapolis letters Prowler 21 Proto thought should voice opinions such subjects Leadout position line rake has written about argued about calculated ever since Control Line started Theoretically leadout should behind center gravity CC airplane flies tangent circle have several forces acting airplane thrust engine centrifugal force because high speed drag inboard wingtip lines drag airplane itself can calculate drag lines apply result wingtip equate moment centrifugal force CC airplane line drag wingtip will cock airplane until forces balance instance leadout 5 inch behind CG moment airplane would centrifugal force multiplied 5 would balanced drag force lines multiplied distance CC wingtip doesnt make difference lines go insideonly fixed wingtip Wild Bill Netzeband wrote columns March-April 1963 May-June 1964 issues American Modeler calculated need two nine degrees rake depending airplane type two degrees Speed model nine degrees Combat aircraft Stunt fliers just put adjustable leadout test-fly until find best spot dont way dont know anyone does want airplane fly attitude tangent circle Bob Lauderdale old Speed flier set several World Records US Speed Team designed Dizzy Boy series airplanes would cock wing slightly such inner wingtip 1/a-inch forward reduced pull lines high speeds didnt slow airplane down also rotated engine cowl positive incidence toward inside circle provide some lift further reduce pull Harold deBolt designer famous Speed Wagon models built fly toward center reduced line tension first monoline units used Dale Kim exited ahead wingtip too Reducing line tension isnt important small models larger heavier models old Class D model pulled like horse got up near 200 mph partly because leadout behind CC look Speed model top rotate can see frontal area doesnt change much airplane pivots drag wont change much does fly tangent circle build monoline models leadout slightly ahead CC two-line models have lines close together rules allow CC centered between airplane balances greatly affects stability wing too far forward might oscillate difficult groove flying build airplane always make parts carve out fuselage finished dimensions assemble tape rubber bands way can shift wing until airplane balances no further back quarter-chord point no 25% way back leading edge aircraft will fly very nicely model balances closer leading edge ahead itbut should skew wing bring leadouts forward desired position like symmetrical airfoils wing stab incidences set zero Some people build lifting section central part wing gradually change symmetrical section outer panels tips have found lifting airfoil essential symmetrical airfoil gives lift need zero settings give stable easy-to-fly airplane After Stunt models fly just fine symmetrical airfoils dont Hobby Full Line Model Airplanes Helicopters Boats Cars JAGUAR 40 ARFPIPER CUB J-3/ARF 40FIRE FLY ARFSKY BABY-S/ ARF YELLOW ALL WOOD CONST j10-15 2C GLOW IN THE DARK25-35 2G TRAINERSP& AL~IMnLSSP&EWing Span 67 Length 43 AFTER SUNSETSAkEWing Span 51 5 Length 36 Wing Span 48 Length 40 gg9Weight 79 lbsWing Span 49 Length 347Weight 33 lbs Weight 40 lbs 57 InsWeigh 22 Ins -24 lbs Item #940ie-sirIteme852 Item#867 Item#865B J DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flflflfljQ3 1400-249-0544 INFORMATION 1-2014604544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 10AM TO 9PM SATUROAYS AM TO 4PM N PACKAGING AND SHIPPING FtE 55 50 NEW JERSEY RESIOENTS ADD t% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 142 Model Aviation OBBY INC JAGUAR 4OIARF 40 SI _ SKr aABY-L/ARF 25-35 2C TRAINER Wing Span 515 LengTh 35 Weight 3 3 lbs Item#854..
Edition: Model Aviation - 1997/03
Page Numbers: 141, 142
Edition: Model Aviation - 1997/03
Page Numbers: 141, 142
CONTROL LINE SPEED TURBOJETS Most have probably seen write-ups advertisements maybe demonstrations small turbojet engines modelers have trying RC Scale airplanes what have read early engines required rather complicated starting system other problems such fuel fuel tanks safety concerns took crew several persons start just like full-scale jet engines Newer versions have improved simplified until can started operated person saw demonstration flight Nats impressive say least sound just like full-scale jet thrust speed outstanding Some us Speed fliers wondered would fly Control Line realized might little too large too powerful Theres new turbojet engine available 43 inches diameter weighs just 265 ounces puts out 75 lb thrust rotor speed 100000 rpm enough fly Control Line-size models Can fly Turbojet Speed might awhile can seriously think using such engine CL Scale now tiny turbojet built company called Golden West Models based Kurt Schrecklings design model aircraft put production Schneider-Sanchez Austria Recently Engineering News magazine short write-up several engines put out 75 100 lb thrust range 265 oz 16 lb Golden West Models FD 3/67 LS engine small made exotic metals such Inconel titanium stainless steel has punched blades curvature instead machined- welded-turbines patented electronic control regulates fuel flow depending input exhaust gas temperature sensor engine tachometer throttle setting second patent covers fuel vaporization system carries kerosene-Coleman gas through /I6inch-diameter Inconel tubing combustion chamber engine cost reported $2995 can just see future nowJet Carrier Jet Aerobatics Jet Racing Jet Combat Talk about Top Gun Cold Cash Speed Bash Last September competed 50th Anniversary Speed Contest hosted Dayton Buzzin Buzzards Harry Roe avid Speed flier has around forever found flyers very first Dayton contest held 1947 Control Line modeling still new rules still formative stage Speed consisted five classes starting engines 10 maximum displacement progressing 20 30 40 50 60 Soon settled down Class 19s Class B 29s Class C 49s Class D 60s someone found out 60-size engines little over 60 size limit Class D size raised 65 weve stuck ever since Dayton contest always scheduled second weekend September usually blessed excellent weather hurricane came up Florida headed straight Dayton year veered east just enough miss us Heavy rains fell just east north Dayton Cleveland clobbered flew Speed hearts content day Saturday Sunday Some fliers didnt come because thought storm would hit turnout good anyway 32 contestants 74 entries 125 official flights turned attempts averaged out flight attempt five minutes 42 seconds Frank Puleo drove way Denver Colorado figured worth set new 21 Sport Speed Record 15484 mph Class record fell three times Tommy Brown flew sidewinder monoline past old record Billy Hughes flew faster Tommy went up again new mark 18665 mph Billy went through three engines bearings couldnt hold up test flight 196 mph Thats moving 15-size airplane Speed Model Design Bob Whitney Florida flies Racing Speed events suggested some good topics column Design parameters such leadout position airfoil shape balance always apparent beginners March 1997 141 Junior King operates starter brother Ed holds 21 Proto Flies backward clockwise lines kept tight torque Denvers Frank Puleo set 21 Sport Speed Bob Whitney drove Dayton Florida record 15484 mph Dayton fly Speedconverted AMA number Indy 21 Ned Morris Indianapolis letters Prowler 21 Proto thought should voice opinions such subjects Leadout position line rake has written about argued about calculated ever since Control Line started Theoretically leadout should behind center gravity CC airplane flies tangent circle have several forces acting airplane thrust engine centrifugal force because high speed drag inboard wingtip lines drag airplane itself can calculate drag lines apply result wingtip equate moment centrifugal force CC airplane line drag wingtip will cock airplane until forces balance instance leadout 5 inch behind CG moment airplane would centrifugal force multiplied 5 would balanced drag force lines multiplied distance CC wingtip doesnt make difference lines go insideonly fixed wingtip Wild Bill Netzeband wrote columns March-April 1963 May-June 1964 issues American Modeler calculated need two nine degrees rake depending airplane type two degrees Speed model nine degrees Combat aircraft Stunt fliers just put adjustable leadout test-fly until find best spot dont way dont know anyone does want airplane fly attitude tangent circle Bob Lauderdale old Speed flier set several World Records US Speed Team designed Dizzy Boy series airplanes would cock wing slightly such inner wingtip 1/a-inch forward reduced pull lines high speeds didnt slow airplane down also rotated engine cowl positive incidence toward inside circle provide some lift further reduce pull Harold deBolt designer famous Speed Wagon models built fly toward center reduced line tension first monoline units used Dale Kim exited ahead wingtip too Reducing line tension isnt important small models larger heavier models old Class D model pulled like horse got up near 200 mph partly because leadout behind CC look Speed model top rotate can see frontal area doesnt change much airplane pivots drag wont change much does fly tangent circle build monoline models leadout slightly ahead CC two-line models have lines close together rules allow CC centered between airplane balances greatly affects stability wing too far forward might oscillate difficult groove flying build airplane always make parts carve out fuselage finished dimensions assemble tape rubber bands way can shift wing until airplane balances no further back quarter-chord point no 25% way back leading edge aircraft will fly very nicely model balances closer leading edge ahead itbut should skew wing bring leadouts forward desired position like symmetrical airfoils wing stab incidences set zero Some people build lifting section central part wing gradually change symmetrical section outer panels tips have found lifting airfoil essential symmetrical airfoil gives lift need zero settings give stable easy-to-fly airplane After Stunt models fly just fine symmetrical airfoils dont Hobby Full Line Model Airplanes Helicopters Boats Cars JAGUAR 40 ARFPIPER CUB J-3/ARF 40FIRE FLY ARFSKY BABY-S/ ARF YELLOW ALL WOOD CONST j10-15 2C GLOW IN THE DARK25-35 2G TRAINERSP& AL~IMnLSSP&EWing Span 67 Length 43 AFTER SUNSETSAkEWing Span 51 5 Length 36 Wing Span 48 Length 40 gg9Weight 79 lbsWing Span 49 Length 347Weight 33 lbs Weight 40 lbs 57 InsWeigh 22 Ins -24 lbs Item #940ie-sirIteme852 Item#867 Item#865B J DEALERS AND DISTRIBUTORS INQUIRIES WELCOME flflflfljQ3 1400-249-0544 INFORMATION 1-2014604544 OUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY 1OAM TO 7PM FRIDAY 10AM TO 9PM SATUROAYS AM TO 4PM N PACKAGING AND SHIPPING FtE 55 50 NEW JERSEY RESIOENTS ADD t% SALES TAX US HOBBY INC 200 MOONACHIE AVE MOONACHIE NJ 07074 142 Model Aviation OBBY INC JAGUAR 4OIARF 40 SI _ SKr aABY-L/ARF 25-35 2C TRAINER Wing Span 515 LengTh 35 Weight 3 3 lbs Item#854..
