IC ONTROL LINE subject fuel has surfaced occasionally column perhaps because us take granted highquality fuels generally available until something bites us know whereat inopportune time case havent experienced dose bad fuelwhich means havent around longId like offer some thoughts analyzing problems potentially bad fuel what can get back right track First have realize true fuel problemassuming other components setup correct testedmay manifest itself four six flights after have changed fuel good engine seems hold its running characteristics will gradually slip unsatisfactory runs Likewise change known good fuel may take Bob McDonalds latest piped ship Gloriann based Werwage aero dynamics Powered HP 40 Smith-Werwage tuned pipe its just gorgeous line design features side-mounted engine applecheek cowls Jim Casales Discovery Westover Nationals Like top competitors Jim has switched tuned pipe authority wind An OS 40 VF used power Jerry Phelps continues produce some cleanest ships seen Avian powered SuperTigre 46 just gets elegant see Bill Rich has become men beat recent years Shown color-coordinated flying gear SuperTigre 60-powered ship Bill has switched new 05 46VF tuned pipe 93 AEROBATICS ral flights settle down good stuff before solid runs return dont have good explanation know its true however because Ive fought through fuel problems modeler Next recognize what problems can attributed fuel Obviously fuel problems will affect engine runs begin have have solid baseline engine run satisfied engine performing well doing right things such adding little power break load going uphill dropping off slightly going downhill Sounds like close description classic stunt run isnormally aspirated piped have fuel problem will start see run get thin among other things power will gradually dropsometimes significant amountto point maneuvers above 450 affected less line tension becomes increasingly difficult fly round maneuvers hold shapes under 450 characteristics may include harder break two-cycle run and/or tendency remain two-cycle mode diminished power erratic running Another very clear tip-off difficulty getting stable setting ground tach Any symptoms can also result other problems means change plug first because instant fix doesnt work look fuel lines etc Just dont overlook bad fuel Lets talk about procedures may help hold down serious impact fuel incident Its important have quantity known good fuel continually test expend renew try keep hand almost-full gallon fuel test flights flown case suspect problem exists way can go run some flights verify problem Once have problem sorted out test new gallon baseline burn previous test batch Its important rotate good stuff doesnt go bad remember Al Rabe used go back Dukes Fuel problem solver days Taffinders Sigs Champion mix would good choice course can always borrow few tanks field check things out Over years Ive evolved own procedures avoid disastrous situations try never fly contest arrive contest site practice fuel hasnt tested home usually mix batches fly gallon same set ingredients verify everything correct Ive bitten before like time switched 28% all-castor fuel SuperTigre 60 worked super few flights became very erratic Nats As soon went back old mix20% oil half Klotzlhalf castoreverything fine Incidentally very close Sig Champion 10% mix Years ago heard Al Rabe claim could detect difference between gallons fuel would fly several flights gallon took Nationals best reserved final five next best top-20 day should mention effects temperature fuels Try avoid extremes possible Nationals take fuel night especially nights cool castor can form globules Heat closed vehicle can funny things prop propylene oxide methanol especially use plastic jugs try use metal cans religiously applies decanting fuel also Mike Pratts Magnum Force tuned-pipe HP 40 Streamlined blisters cowl enclose header Stock headers available Randy Smiths Aero Products 102 Model Aviation GN YOUR OWN RC MODEL SAILPLANE AND ANALYZE ITS FLIGHT PERFORMANCE INTRODUCING TWO NEW EDUCATIONAL COMPUTER PROGRAMS PROGRAM 1 ODEL SAILPLANESOESIGN AND ANALYSIS RS STABILITY AND COIITROL PROGRAM 2 RC MODEL SAILPLANESSTEADY STATE FLIGHT ANALYSIS COVERS PERFORMANCE ESTIMATION AND THE DETAILED ANALYSIS OF SOURCES OF DRAG KEY FEATURES aTHE USER MANUALS CONTAIN STEPBYSTEP INSTRUCTION FOR INPUTTING DESIGN DATA z BOTH PROGRAMS CONTAIN EXTENSIVE TUTORIAL BACKGROUND MATERIAL IN COLOR GRAPHIC FORM z EQUATIONS AND DATA USED IN THE PROGRAMS ARE CAREFULLY REFERENCED TO STANDARD TEXT BOOKS AND REFERENCE WORKS OF AERONAUTICAL ENGINEERING MANY EXAMPLES INCLUDED COMPUTER REQUIREMENTS 1DM PERSONAL COMPUTER MODEL XT OR AT OR PS2 OR COMPATIBLE COMPUTER RUNNING MSDOS 33 OR LATER b EGA OR VGA COLOR DISPLAY c 316 KB OF COMPUTER MEMORY d HARD DISK DRIVE WITH 35 MB OF AVAILABLE MEMORY e AT LEAST ONE OF THE FOLLOWING DISKETTE DRIVES 35 INL44 MB z B 35 IN 720 KB C 525 IN 12 MB PRINTER IS OPTIONAL PLEASE NOTE 366 KB DRIVES ARE NOT SUPPORTED TO ORDER CHECK THE APPROPRIATE BOXES ATTACH YOUR CHECK OR MONEY ORDER 111TH YOUR MAILING ADDRESS MAIL TO STELLAR INSTRUMENT NORTHWEST INC 7 POWDERHORN DRIVE BEND 77019554 PRICES RICLUDE FIRST CLASS POSTAGE 90 DAY LIMITED WARRANTY PROGRAM SELECTION DISKETTE SELECTION PRICES USA & CANADA PRICES OVERSEAS SENOPROGRAMi0 CA 08 CCEI$65IEJ$74 SEND PROGRAM 2CC C B C CC $55C $64 SEND BOTH PROGRAMS n CA 08 CC IC$1050S123 Since mix own fuel try keep ingredients separate long possible mix enough immediate needs find have fewer problems ingredients use prop As know flash point pure prop 550F best way keep relatively stable 50/50 mix methanol Doug Taffinder sells way has no trouble cautious pure prop toxic low flash point can cause problems topic safety prudent observe published safety rules fuels mixes relatively benign ingredients carry cautions certain circumstances Recommended products Last year Bob Hunt recommended try Hobbypoxys new product Smooth n Easy two-part epoxy finishing resin So purchased box its one-to-one mix comes two-tube set first application tried fuel proof inside tank compartment characteristic appealed initially thin viscosity mixture made really nice brush simply poured about 20cc area spread around acid brush let soak penetrated nicely As mixture set formed hard smooth surface perfect fuelproofing application insurance Id recommend light sanding followed light second application wiping off what can paper towel Until last few months tried another application Bob enthusiastic about covering foam wings years Id used Hobbypoxy Formula 2 heated give nice consistency satisfied results work quickly somehow always messy Also concerned about fumes heated epoxy always wore double filter mask Smooth n Easy fumes minimal thin consistency works trick application Just use spreader small notches A2 work resin balsa skins leaving ridges created notches spreader object minimize epoxy remaining surface Apply wing skins foam normally would weigh down flat surface Youll find surface very rigid adheres well light Ive also used resin glue wing tips resin sets up hard sands easily seam works easily normal sanding As opposed what has happened other glues joint still invisible after summer hot Texas sun Tech tip Now right off Ive got admit Im no expert subject nylon tie wraps As era pipe upon us some knowledge electrical tie wraps necessary just make pipe tune properly first thing point out buy youre just starting out youre going use bunch Forget Radio Shack local hobby shop long-term source Find electrical contractor supplier buy quantity As comparison Radio Shack sold pack 25 just under $3 supplier pack 100 $350 Also will have better selection different types colors Dont get too narrow band because probably wont seal well wider band Im using 1/4-inch-wide 10-inch-long nylon works very well rLgervoMatLists $2495 plus Conneors CheckS NeuIntroductory PriCe -ctOrs 2 $500 set nstallation TeStS 0~aged servos$i99plus OptiC fl8l COnne EaSY Servo 1tral & Travel AlE positive Pulse SerVOS 48 point Annual RIO gystem- ncludes NicadsConneSidebands MonolS Rates Indicators Connec -ctOtS SerVoSciears Connectors & Neutrals CaPacitYdulatioflAntenna Tuning & Alignmnt5 TX OUtPUt power FreclUe ncntennaRx Harnesses Switches Con nectorsResultsof Complete System& Returfl ghippiflg Rx Tuning & Alignments Ou ACharg needd%e3~MI 48167 tingAllY UntIl t priceS VibrationCheCl GOOdNOth vine KMI 115 E Main313 3480085 et Tes - Data AX 3484~ April 1993 103 Scale versions famous famous CI11~ ~Gipsy Moth Mustang z MacDonald LaceyAceMad Cap Zero_74L Fly great blue yonder Peck-Polymers New Catalog 14W u PeckwPevmersCA 92072We accept Wa MasterCard 619448-1818FAX 619 448-1833and American Express J COMET LING ELAND VICTOR STANZEL EST ER MBECKER o 0 0 Goldberg. Walker. Taibi. lt recognize names youre gonna love DOYOUSPEAK MODEL AIRPLANE 0 Its Dave Thomburgs concise witty history US aeromodeling 0 twin pusher ugliest Stik its volume 5 othe heroes models clubs kitmakers _ laid groundwork todays hobby-sport Order copy now Money back bores 20 pages paperback $1995 ACE SIG dealer postpaid C Pony X Press 5 Monticello Drive Albuquerque NM 87123 e 505 299-8749 Cash Check MO Visa-Mastercard 0 w l available Thornburgs OLD BUZZARDS SOARING BOOK 5 pp m BAY RIDGE NTIFIC LESS L ICAN JUNIOR ONE T CARMEL T PLANES juSt five minutes can convert standard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded super tough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops output shaft wobble * Improves servo Centering * Increases usable torque Reduces battery drain * Better servo performance planes cars boats * Free output arm case top * Guaranteed against breakage year BBC-1Fits FUTABA 528/5128 S38/S138 or548/5148 Servos set 4$2595 BBC2As above set 1$695 BBC3Fits AIRTRONICS 94102 Servos set 4$2595 BBC4As above set 1$695 BBC5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330 or343 TOWER TS-5 1 Servos set 4$1995ELECTRONIC MODEL SYSTEMS * Add $350 Shipping Handling allordersEIIiS 22483 Mission Hills Lane * California Residents Add 775% Sales Tax800 Yorba Linda CA 92687 * VISA845-8978 Orders Only MASTERCARD Accepted714 692-1393 Info Only next item observation seems minimize opportunity coupling leaks fell accident scientific deduction What started doing using two tie wraps end coupler may seem wasteful since starting procedure havent noticed leaks heavy dark blue coupler need extra insurance Installing tie wrap getting snug tearing everything up also giving fits Watching John Hill day made light bulb come Looking down installation grasp end tie wrap did secure loosely around coupler didnt needle-nose pliers rotate tie end against fixture end using leverage point may need reposition pliers several times maintain adequate leverage Once have hang procedure will seem simple Another reminder join PAMPA Precision Aerobatics Model Pilots AssociationEd arm promote precision aerobatics flying Contact Tom Morris PAMPA 1019 Creek Trail Anniston AL 36206 urationlHaught Continued page 98 free flight accomplishments Balsa Bugs FAI teams 10 different members several national team championships SAM champions Mulvihill winners Stout IndoorCabin Commercialwinners countless other local regional national awards club has also become multigenerational example early member Ernie Shailor s two sons Paul Bill now active Pauls daughter Jennifer recently high-time winner local contest Paul Shailor s wife Gail also daughter another Balsa Bug Paul Simon truly family affair club continues meet Friday Victory Inn Warren Michigan Paul Crowley told meetings shoptalk talk about much modeling really care about look out otherweve hired other during tough times Perhaps Marlene Stolls postscript written history Balsa Bugs best sums up feelings over quarter century have sidelines support system modeler husband Ed So have other wives modelers What has held group together years love aviation love excellence craftsmanship love competition love fellow modelers Happy birthday Baisa Bugs past present future Model Aviation
Edition: Model Aviation - 1993/04
Page Numbers: 102, 103, 104
IC ONTROL LINE subject fuel has surfaced occasionally column perhaps because us take granted highquality fuels generally available until something bites us know whereat inopportune time case havent experienced dose bad fuelwhich means havent around longId like offer some thoughts analyzing problems potentially bad fuel what can get back right track First have realize true fuel problemassuming other components setup correct testedmay manifest itself four six flights after have changed fuel good engine seems hold its running characteristics will gradually slip unsatisfactory runs Likewise change known good fuel may take Bob McDonalds latest piped ship Gloriann based Werwage aero dynamics Powered HP 40 Smith-Werwage tuned pipe its just gorgeous line design features side-mounted engine applecheek cowls Jim Casales Discovery Westover Nationals Like top competitors Jim has switched tuned pipe authority wind An OS 40 VF used power Jerry Phelps continues produce some cleanest ships seen Avian powered SuperTigre 46 just gets elegant see Bill Rich has become men beat recent years Shown color-coordinated flying gear SuperTigre 60-powered ship Bill has switched new 05 46VF tuned pipe 93 AEROBATICS ral flights settle down good stuff before solid runs return dont have good explanation know its true however because Ive fought through fuel problems modeler Next recognize what problems can attributed fuel Obviously fuel problems will affect engine runs begin have have solid baseline engine run satisfied engine performing well doing right things such adding little power break load going uphill dropping off slightly going downhill Sounds like close description classic stunt run isnormally aspirated piped have fuel problem will start see run get thin among other things power will gradually dropsometimes significant amountto point maneuvers above 450 affected less line tension becomes increasingly difficult fly round maneuvers hold shapes under 450 characteristics may include harder break two-cycle run and/or tendency remain two-cycle mode diminished power erratic running Another very clear tip-off difficulty getting stable setting ground tach Any symptoms can also result other problems means change plug first because instant fix doesnt work look fuel lines etc Just dont overlook bad fuel Lets talk about procedures may help hold down serious impact fuel incident Its important have quantity known good fuel continually test expend renew try keep hand almost-full gallon fuel test flights flown case suspect problem exists way can go run some flights verify problem Once have problem sorted out test new gallon baseline burn previous test batch Its important rotate good stuff doesnt go bad remember Al Rabe used go back Dukes Fuel problem solver days Taffinders Sigs Champion mix would good choice course can always borrow few tanks field check things out Over years Ive evolved own procedures avoid disastrous situations try never fly contest arrive contest site practice fuel hasnt tested home usually mix batches fly gallon same set ingredients verify everything correct Ive bitten before like time switched 28% all-castor fuel SuperTigre 60 worked super few flights became very erratic Nats As soon went back old mix20% oil half Klotzlhalf castoreverything fine Incidentally very close Sig Champion 10% mix Years ago heard Al Rabe claim could detect difference between gallons fuel would fly several flights gallon took Nationals best reserved final five next best top-20 day should mention effects temperature fuels Try avoid extremes possible Nationals take fuel night especially nights cool castor can form globules Heat closed vehicle can funny things prop propylene oxide methanol especially use plastic jugs try use metal cans religiously applies decanting fuel also Mike Pratts Magnum Force tuned-pipe HP 40 Streamlined blisters cowl enclose header Stock headers available Randy Smiths Aero Products 102 Model Aviation GN YOUR OWN RC MODEL SAILPLANE AND ANALYZE ITS FLIGHT PERFORMANCE INTRODUCING TWO NEW EDUCATIONAL COMPUTER PROGRAMS PROGRAM 1 ODEL SAILPLANESOESIGN AND ANALYSIS RS STABILITY AND COIITROL PROGRAM 2 RC MODEL SAILPLANESSTEADY STATE FLIGHT ANALYSIS COVERS PERFORMANCE ESTIMATION AND THE DETAILED ANALYSIS OF SOURCES OF DRAG KEY FEATURES aTHE USER MANUALS CONTAIN STEPBYSTEP INSTRUCTION FOR INPUTTING DESIGN DATA z BOTH PROGRAMS CONTAIN EXTENSIVE TUTORIAL BACKGROUND MATERIAL IN COLOR GRAPHIC FORM z EQUATIONS AND DATA USED IN THE PROGRAMS ARE CAREFULLY REFERENCED TO STANDARD TEXT BOOKS AND REFERENCE WORKS OF AERONAUTICAL ENGINEERING MANY EXAMPLES INCLUDED COMPUTER REQUIREMENTS 1DM PERSONAL COMPUTER MODEL XT OR AT OR PS2 OR COMPATIBLE COMPUTER RUNNING MSDOS 33 OR LATER b EGA OR VGA COLOR DISPLAY c 316 KB OF COMPUTER MEMORY d HARD DISK DRIVE WITH 35 MB OF AVAILABLE MEMORY e AT LEAST ONE OF THE FOLLOWING DISKETTE DRIVES 35 INL44 MB z B 35 IN 720 KB C 525 IN 12 MB PRINTER IS OPTIONAL PLEASE NOTE 366 KB DRIVES ARE NOT SUPPORTED TO ORDER CHECK THE APPROPRIATE BOXES ATTACH YOUR CHECK OR MONEY ORDER 111TH YOUR MAILING ADDRESS MAIL TO STELLAR INSTRUMENT NORTHWEST INC 7 POWDERHORN DRIVE BEND 77019554 PRICES RICLUDE FIRST CLASS POSTAGE 90 DAY LIMITED WARRANTY PROGRAM SELECTION DISKETTE SELECTION PRICES USA & CANADA PRICES OVERSEAS SENOPROGRAMi0 CA 08 CCEI$65IEJ$74 SEND PROGRAM 2CC C B C CC $55C $64 SEND BOTH PROGRAMS n CA 08 CC IC$1050S123 Since mix own fuel try keep ingredients separate long possible mix enough immediate needs find have fewer problems ingredients use prop As know flash point pure prop 550F best way keep relatively stable 50/50 mix methanol Doug Taffinder sells way has no trouble cautious pure prop toxic low flash point can cause problems topic safety prudent observe published safety rules fuels mixes relatively benign ingredients carry cautions certain circumstances Recommended products Last year Bob Hunt recommended try Hobbypoxys new product Smooth n Easy two-part epoxy finishing resin So purchased box its one-to-one mix comes two-tube set first application tried fuel proof inside tank compartment characteristic appealed initially thin viscosity mixture made really nice brush simply poured about 20cc area spread around acid brush let soak penetrated nicely As mixture set formed hard smooth surface perfect fuelproofing application insurance Id recommend light sanding followed light second application wiping off what can paper towel Until last few months tried another application Bob enthusiastic about covering foam wings years Id used Hobbypoxy Formula 2 heated give nice consistency satisfied results work quickly somehow always messy Also concerned about fumes heated epoxy always wore double filter mask Smooth n Easy fumes minimal thin consistency works trick application Just use spreader small notches A2 work resin balsa skins leaving ridges created notches spreader object minimize epoxy remaining surface Apply wing skins foam normally would weigh down flat surface Youll find surface very rigid adheres well light Ive also used resin glue wing tips resin sets up hard sands easily seam works easily normal sanding As opposed what has happened other glues joint still invisible after summer hot Texas sun Tech tip Now right off Ive got admit Im no expert subject nylon tie wraps As era pipe upon us some knowledge electrical tie wraps necessary just make pipe tune properly first thing point out buy youre just starting out youre going use bunch Forget Radio Shack local hobby shop long-term source Find electrical contractor supplier buy quantity As comparison Radio Shack sold pack 25 just under $3 supplier pack 100 $350 Also will have better selection different types colors Dont get too narrow band because probably wont seal well wider band Im using 1/4-inch-wide 10-inch-long nylon works very well rLgervoMatLists $2495 plus Conneors CheckS NeuIntroductory PriCe -ctOrs 2 $500 set nstallation TeStS 0~aged servos$i99plus OptiC fl8l COnne EaSY Servo 1tral & Travel AlE positive Pulse SerVOS 48 point Annual RIO gystem- ncludes NicadsConneSidebands MonolS Rates Indicators Connec -ctOtS SerVoSciears Connectors & Neutrals CaPacitYdulatioflAntenna Tuning & Alignmnt5 TX OUtPUt power FreclUe ncntennaRx Harnesses Switches Con nectorsResultsof Complete System& Returfl ghippiflg Rx Tuning & Alignments Ou ACharg needd%e3~MI 48167 tingAllY UntIl t priceS VibrationCheCl GOOdNOth vine KMI 115 E Main313 3480085 et Tes - Data AX 3484~ April 1993 103 Scale versions famous famous CI11~ ~Gipsy Moth Mustang z MacDonald LaceyAceMad Cap Zero_74L Fly great blue yonder Peck-Polymers New Catalog 14W u PeckwPevmersCA 92072We accept Wa MasterCard 619448-1818FAX 619 448-1833and American Express J COMET LING ELAND VICTOR STANZEL EST ER MBECKER o 0 0 Goldberg. Walker. Taibi. lt recognize names youre gonna love DOYOUSPEAK MODEL AIRPLANE 0 Its Dave Thomburgs concise witty history US aeromodeling 0 twin pusher ugliest Stik its volume 5 othe heroes models clubs kitmakers _ laid groundwork todays hobby-sport Order copy now Money back bores 20 pages paperback $1995 ACE SIG dealer postpaid C Pony X Press 5 Monticello Drive Albuquerque NM 87123 e 505 299-8749 Cash Check MO Visa-Mastercard 0 w l available Thornburgs OLD BUZZARDS SOARING BOOK 5 pp m BAY RIDGE NTIFIC LESS L ICAN JUNIOR ONE T CARMEL T PLANES juSt five minutes can convert standard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded super tough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops output shaft wobble * Improves servo Centering * Increases usable torque Reduces battery drain * Better servo performance planes cars boats * Free output arm case top * Guaranteed against breakage year BBC-1Fits FUTABA 528/5128 S38/S138 or548/5148 Servos set 4$2595 BBC2As above set 1$695 BBC3Fits AIRTRONICS 94102 Servos set 4$2595 BBC4As above set 1$695 BBC5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330 or343 TOWER TS-5 1 Servos set 4$1995ELECTRONIC MODEL SYSTEMS * Add $350 Shipping Handling allordersEIIiS 22483 Mission Hills Lane * California Residents Add 775% Sales Tax800 Yorba Linda CA 92687 * VISA845-8978 Orders Only MASTERCARD Accepted714 692-1393 Info Only next item observation seems minimize opportunity coupling leaks fell accident scientific deduction What started doing using two tie wraps end coupler may seem wasteful since starting procedure havent noticed leaks heavy dark blue coupler need extra insurance Installing tie wrap getting snug tearing everything up also giving fits Watching John Hill day made light bulb come Looking down installation grasp end tie wrap did secure loosely around coupler didnt needle-nose pliers rotate tie end against fixture end using leverage point may need reposition pliers several times maintain adequate leverage Once have hang procedure will seem simple Another reminder join PAMPA Precision Aerobatics Model Pilots AssociationEd arm promote precision aerobatics flying Contact Tom Morris PAMPA 1019 Creek Trail Anniston AL 36206 urationlHaught Continued page 98 free flight accomplishments Balsa Bugs FAI teams 10 different members several national team championships SAM champions Mulvihill winners Stout IndoorCabin Commercialwinners countless other local regional national awards club has also become multigenerational example early member Ernie Shailor s two sons Paul Bill now active Pauls daughter Jennifer recently high-time winner local contest Paul Shailor s wife Gail also daughter another Balsa Bug Paul Simon truly family affair club continues meet Friday Victory Inn Warren Michigan Paul Crowley told meetings shoptalk talk about much modeling really care about look out otherweve hired other during tough times Perhaps Marlene Stolls postscript written history Balsa Bugs best sums up feelings over quarter century have sidelines support system modeler husband Ed So have other wives modelers What has held group together years love aviation love excellence craftsmanship love competition love fellow modelers Happy birthday Baisa Bugs past present future Model Aviation
Edition: Model Aviation - 1993/04
Page Numbers: 102, 103, 104
IC ONTROL LINE subject fuel has surfaced occasionally column perhaps because us take granted highquality fuels generally available until something bites us know whereat inopportune time case havent experienced dose bad fuelwhich means havent around longId like offer some thoughts analyzing problems potentially bad fuel what can get back right track First have realize true fuel problemassuming other components setup correct testedmay manifest itself four six flights after have changed fuel good engine seems hold its running characteristics will gradually slip unsatisfactory runs Likewise change known good fuel may take Bob McDonalds latest piped ship Gloriann based Werwage aero dynamics Powered HP 40 Smith-Werwage tuned pipe its just gorgeous line design features side-mounted engine applecheek cowls Jim Casales Discovery Westover Nationals Like top competitors Jim has switched tuned pipe authority wind An OS 40 VF used power Jerry Phelps continues produce some cleanest ships seen Avian powered SuperTigre 46 just gets elegant see Bill Rich has become men beat recent years Shown color-coordinated flying gear SuperTigre 60-powered ship Bill has switched new 05 46VF tuned pipe 93 AEROBATICS ral flights settle down good stuff before solid runs return dont have good explanation know its true however because Ive fought through fuel problems modeler Next recognize what problems can attributed fuel Obviously fuel problems will affect engine runs begin have have solid baseline engine run satisfied engine performing well doing right things such adding little power break load going uphill dropping off slightly going downhill Sounds like close description classic stunt run isnormally aspirated piped have fuel problem will start see run get thin among other things power will gradually dropsometimes significant amountto point maneuvers above 450 affected less line tension becomes increasingly difficult fly round maneuvers hold shapes under 450 characteristics may include harder break two-cycle run and/or tendency remain two-cycle mode diminished power erratic running Another very clear tip-off difficulty getting stable setting ground tach Any symptoms can also result other problems means change plug first because instant fix doesnt work look fuel lines etc Just dont overlook bad fuel Lets talk about procedures may help hold down serious impact fuel incident Its important have quantity known good fuel continually test expend renew try keep hand almost-full gallon fuel test flights flown case suspect problem exists way can go run some flights verify problem Once have problem sorted out test new gallon baseline burn previous test batch Its important rotate good stuff doesnt go bad remember Al Rabe used go back Dukes Fuel problem solver days Taffinders Sigs Champion mix would good choice course can always borrow few tanks field check things out Over years Ive evolved own procedures avoid disastrous situations try never fly contest arrive contest site practice fuel hasnt tested home usually mix batches fly gallon same set ingredients verify everything correct Ive bitten before like time switched 28% all-castor fuel SuperTigre 60 worked super few flights became very erratic Nats As soon went back old mix20% oil half Klotzlhalf castoreverything fine Incidentally very close Sig Champion 10% mix Years ago heard Al Rabe claim could detect difference between gallons fuel would fly several flights gallon took Nationals best reserved final five next best top-20 day should mention effects temperature fuels Try avoid extremes possible Nationals take fuel night especially nights cool castor can form globules Heat closed vehicle can funny things prop propylene oxide methanol especially use plastic jugs try use metal cans religiously applies decanting fuel also Mike Pratts Magnum Force tuned-pipe HP 40 Streamlined blisters cowl enclose header Stock headers available Randy Smiths Aero Products 102 Model Aviation GN YOUR OWN RC MODEL SAILPLANE AND ANALYZE ITS FLIGHT PERFORMANCE INTRODUCING TWO NEW EDUCATIONAL COMPUTER PROGRAMS PROGRAM 1 ODEL SAILPLANESOESIGN AND ANALYSIS RS STABILITY AND COIITROL PROGRAM 2 RC MODEL SAILPLANESSTEADY STATE FLIGHT ANALYSIS COVERS PERFORMANCE ESTIMATION AND THE DETAILED ANALYSIS OF SOURCES OF DRAG KEY FEATURES aTHE USER MANUALS CONTAIN STEPBYSTEP INSTRUCTION FOR INPUTTING DESIGN DATA z BOTH PROGRAMS CONTAIN EXTENSIVE TUTORIAL BACKGROUND MATERIAL IN COLOR GRAPHIC FORM z EQUATIONS AND DATA USED IN THE PROGRAMS ARE CAREFULLY REFERENCED TO STANDARD TEXT BOOKS AND REFERENCE WORKS OF AERONAUTICAL ENGINEERING MANY EXAMPLES INCLUDED COMPUTER REQUIREMENTS 1DM PERSONAL COMPUTER MODEL XT OR AT OR PS2 OR COMPATIBLE COMPUTER RUNNING MSDOS 33 OR LATER b EGA OR VGA COLOR DISPLAY c 316 KB OF COMPUTER MEMORY d HARD DISK DRIVE WITH 35 MB OF AVAILABLE MEMORY e AT LEAST ONE OF THE FOLLOWING DISKETTE DRIVES 35 INL44 MB z B 35 IN 720 KB C 525 IN 12 MB PRINTER IS OPTIONAL PLEASE NOTE 366 KB DRIVES ARE NOT SUPPORTED TO ORDER CHECK THE APPROPRIATE BOXES ATTACH YOUR CHECK OR MONEY ORDER 111TH YOUR MAILING ADDRESS MAIL TO STELLAR INSTRUMENT NORTHWEST INC 7 POWDERHORN DRIVE BEND 77019554 PRICES RICLUDE FIRST CLASS POSTAGE 90 DAY LIMITED WARRANTY PROGRAM SELECTION DISKETTE SELECTION PRICES USA & CANADA PRICES OVERSEAS SENOPROGRAMi0 CA 08 CCEI$65IEJ$74 SEND PROGRAM 2CC C B C CC $55C $64 SEND BOTH PROGRAMS n CA 08 CC IC$1050S123 Since mix own fuel try keep ingredients separate long possible mix enough immediate needs find have fewer problems ingredients use prop As know flash point pure prop 550F best way keep relatively stable 50/50 mix methanol Doug Taffinder sells way has no trouble cautious pure prop toxic low flash point can cause problems topic safety prudent observe published safety rules fuels mixes relatively benign ingredients carry cautions certain circumstances Recommended products Last year Bob Hunt recommended try Hobbypoxys new product Smooth n Easy two-part epoxy finishing resin So purchased box its one-to-one mix comes two-tube set first application tried fuel proof inside tank compartment characteristic appealed initially thin viscosity mixture made really nice brush simply poured about 20cc area spread around acid brush let soak penetrated nicely As mixture set formed hard smooth surface perfect fuelproofing application insurance Id recommend light sanding followed light second application wiping off what can paper towel Until last few months tried another application Bob enthusiastic about covering foam wings years Id used Hobbypoxy Formula 2 heated give nice consistency satisfied results work quickly somehow always messy Also concerned about fumes heated epoxy always wore double filter mask Smooth n Easy fumes minimal thin consistency works trick application Just use spreader small notches A2 work resin balsa skins leaving ridges created notches spreader object minimize epoxy remaining surface Apply wing skins foam normally would weigh down flat surface Youll find surface very rigid adheres well light Ive also used resin glue wing tips resin sets up hard sands easily seam works easily normal sanding As opposed what has happened other glues joint still invisible after summer hot Texas sun Tech tip Now right off Ive got admit Im no expert subject nylon tie wraps As era pipe upon us some knowledge electrical tie wraps necessary just make pipe tune properly first thing point out buy youre just starting out youre going use bunch Forget Radio Shack local hobby shop long-term source Find electrical contractor supplier buy quantity As comparison Radio Shack sold pack 25 just under $3 supplier pack 100 $350 Also will have better selection different types colors Dont get too narrow band because probably wont seal well wider band Im using 1/4-inch-wide 10-inch-long nylon works very well rLgervoMatLists $2495 plus Conneors CheckS NeuIntroductory PriCe -ctOrs 2 $500 set nstallation TeStS 0~aged servos$i99plus OptiC fl8l COnne EaSY Servo 1tral & Travel AlE positive Pulse SerVOS 48 point Annual RIO gystem- ncludes NicadsConneSidebands MonolS Rates Indicators Connec -ctOtS SerVoSciears Connectors & Neutrals CaPacitYdulatioflAntenna Tuning & Alignmnt5 TX OUtPUt power FreclUe ncntennaRx Harnesses Switches Con nectorsResultsof Complete System& Returfl ghippiflg Rx Tuning & Alignments Ou ACharg needd%e3~MI 48167 tingAllY UntIl t priceS VibrationCheCl GOOdNOth vine KMI 115 E Main313 3480085 et Tes - Data AX 3484~ April 1993 103 Scale versions famous famous CI11~ ~Gipsy Moth Mustang z MacDonald LaceyAceMad Cap Zero_74L Fly great blue yonder Peck-Polymers New Catalog 14W u PeckwPevmersCA 92072We accept Wa MasterCard 619448-1818FAX 619 448-1833and American Express J COMET LING ELAND VICTOR STANZEL EST ER MBECKER o 0 0 Goldberg. Walker. Taibi. lt recognize names youre gonna love DOYOUSPEAK MODEL AIRPLANE 0 Its Dave Thomburgs concise witty history US aeromodeling 0 twin pusher ugliest Stik its volume 5 othe heroes models clubs kitmakers _ laid groundwork todays hobby-sport Order copy now Money back bores 20 pages paperback $1995 ACE SIG dealer postpaid C Pony X Press 5 Monticello Drive Albuquerque NM 87123 e 505 299-8749 Cash Check MO Visa-Mastercard 0 w l available Thornburgs OLD BUZZARDS SOARING BOOK 5 pp m BAY RIDGE NTIFIC LESS L ICAN JUNIOR ONE T CARMEL T PLANES juSt five minutes can convert standard Futaba Airtronics servos ball bearing servos new EMS Ball Bearing Conversion Kit New case tops accurately molded super tough glass filled fuel-proof Celcon include top quality stainless steel ball bearing servo output shaft * Stops output shaft wobble * Improves servo Centering * Increases usable torque Reduces battery drain * Better servo performance planes cars boats * Free output arm case top * Guaranteed against breakage year BBC-1Fits FUTABA 528/5128 S38/S138 or548/5148 Servos set 4$2595 BBC2As above set 1$695 BBC3Fits AIRTRONICS 94102 Servos set 4$2595 BBC4As above set 1$695 BBC5Ball Bearing Only JR 501 507 RCDAPOLLO 05 10 FOCUS HS300 HS500 ACE 330 or343 TOWER TS-5 1 Servos set 4$1995ELECTRONIC MODEL SYSTEMS * Add $350 Shipping Handling allordersEIIiS 22483 Mission Hills Lane * California Residents Add 775% Sales Tax800 Yorba Linda CA 92687 * VISA845-8978 Orders Only MASTERCARD Accepted714 692-1393 Info Only next item observation seems minimize opportunity coupling leaks fell accident scientific deduction What started doing using two tie wraps end coupler may seem wasteful since starting procedure havent noticed leaks heavy dark blue coupler need extra insurance Installing tie wrap getting snug tearing everything up also giving fits Watching John Hill day made light bulb come Looking down installation grasp end tie wrap did secure loosely around coupler didnt needle-nose pliers rotate tie end against fixture end using leverage point may need reposition pliers several times maintain adequate leverage Once have hang procedure will seem simple Another reminder join PAMPA Precision Aerobatics Model Pilots AssociationEd arm promote precision aerobatics flying Contact Tom Morris PAMPA 1019 Creek Trail Anniston AL 36206 urationlHaught Continued page 98 free flight accomplishments Balsa Bugs FAI teams 10 different members several national team championships SAM champions Mulvihill winners Stout IndoorCabin Commercialwinners countless other local regional national awards club has also become multigenerational example early member Ernie Shailor s two sons Paul Bill now active Pauls daughter Jennifer recently high-time winner local contest Paul Shailor s wife Gail also daughter another Balsa Bug Paul Simon truly family affair club continues meet Friday Victory Inn Warren Michigan Paul Crowley told meetings shoptalk talk about much modeling really care about look out otherweve hired other during tough times Perhaps Marlene Stolls postscript written history Balsa Bugs best sums up feelings over quarter century have sidelines support system modeler husband Ed So have other wives modelers What has held group together years love aviation love excellence craftsmanship love competition love fellow modelers Happy birthday Baisa Bugs past present future Model Aviation