RACING FUEL have numerous formal written requests information basic fuel composition percentages used top competitors Racing event past few years have produced constant price increses fuel gredients especially nitromethane early 1970s nitro cost approximately $450 gallon contrasted 1979 prices around $2000 gallon have observed advertisements preblended fuels model magazines club newsletters racing fuel listed 40% 50% nitro content could easily cost $25-35 gallon including UPS charges Certainly Racing enthusiasts interest use amount nitro con tent fuel required produce acceptable speed good pitting respect able engine life have seen com petitors dose fuel tanks 65% 75% nitro fuel find air speed very close same 40-50% fuelplus increased problems plug life restarting stances obviously lack satisfactory air speed result other factors Basic ingredients Basic fuel components have changed drastically since early Sixties Don Hoyer sold Custom Blend racing fuel over entire Midwest area trunk car also Parcel Post Don used 5% 8% nitrobenzine co solvent ensure higher-content-nitro fuels would accept castor oil principal lubricant acute toxicity infor mation available today nitrobenzine its use fuel has halted can remember special Racing fuel very popular around Chicago area sold glass bottles called Wysongs Ithopped up As recall late Sixties Hoyer fuel blender posted nitro content fuels general lack fuel ingredients prompted competitors home brew fuel control nitro content quality ingredients demise nitrobenzine co solvent stable fuel solutions required use synthetic oils about 25% 30% nitro concentration castor oil becomes insoluble portion oil forms globules appear similar chicken fat soup No amount mixing will reincorporate oil other hand synthetic oils mixable concentrations nitro Generally synthetic oils used since middle Seventies includes Union Car bides MA-2270 MA-739 LB-625 LB-525 LB-l 100 amount oil used varies since endless opinions subject use 18% LB-625 2% Luberziene N- 1 N- 1 added im prove wetting properties synthetic oil minimize engine damage during lean runs think problem ingredient present formulas methyl alcohol methanol Typical methanol has between 2%-8% water included know methanol water scavenger humid Midwest day open fuel container will pick up another 5%-10% water Included water causes engines run hot special care must taken eliminate moisture predictable performance expected remain ing portion jug fuel used humid rainy day should set aside used rich break-in runs typi cal formula 50%-nitro fuel follows Fluid oz 256 640 384 1280 Ingredient Oil Nitromethane Methanol Total 128 fluid oz Percent mix 20 50 30 1 100 gal Keeping oil constant 20% may vary nitro alcohol required Al ways check calculation must total 128 fluid ounces Lets improve participation 1986 AMA rule book comes out Mr Jim Rick etts chairman Racing Advisory Committee RAC has sent summary provided Bill Lee basic feelings majority CL Racing competitors attended 1983 Nationals Obviously Bill has added some personal opinions certainly shared others subject Rat Race Slow Rat am including Bills letter would certainly solicit comments other Racing competitors Last year Westover signif icant conversation among Racing fliers about various changes could/should made would like list ones Im interested ask pass RAC possible sponsorship Rat Race Rat has gotten completely out realm reason few compete itand few Continued page 168 alcohol-based model fuels require special handling performance-producing qualities maintained high levels Naturally fuel should filtered being transferred container container well filler fuel tank prevent foreign particles getting models fuel system clogging obvious need keep fuel absorbing moistureespecIally humid air photo left competitor keeps big gallon fuel jug filled capped refills smaller easier-to-handle fill-bottle refuel model smaller plastic bottle just below big jug large-diameter filler tube neck photo right same fill-bottle being used reservoir smaller fuel bulb Note filter stacked over big fuel jugit appears disposable unit such found lawn mower repair shops 72 Model Aviation Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE Matcneo rerTormance ysrem TOP PERFORMANCE CAB ENGINES 16 Airplane 4 Marine KAB FUELSCAB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE CAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER CAB SUPER FOXY RESIN CAB SUPER FOXY THINNER CAB SUPER POXY PRIMER KAB SUPER POXY PAINT KAB MIXING CUPS 4 II AU ELI II 4-4 very completeconstruction balsa kit Simple gets air fast Easy fly flight perfor out sight Requires r- engine 4 ch radio Ask dealer writ 4- RICKSKlTSformoreinformationI 5 4 L II RICKS KITSP0 BoxilOS SanteeCA92071 CL Racing/Ballard Continued page 168 vides easily-built model easily flown someone virtually skill level pilot things can built minimal investment either ma terials time performance level restricted engines very reasonable around 17 seconds slower would fear model allowed given signif icant horsepower Any change must accompanied decrease available horsepower Thats end Bill Lees letter Northwest Regionals coming Winston-Salem NC AAAA Control Line Meet highlights racing season Midwest area Northwest colleagues have developed type nual contest Eugene OR Annual Northwest Regional Control Line Cham pionships over Memorial Day weekend May 26-27 1984 will feature Racing events Certainly possible should included competition calendar information write Contest Direc tor John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 73 started Speed 1967 ex-Roselle McCoy 64 ship Harry Roe Jerry Roselle Jack Frye Warren Gregory helped learn never really have threat national competition flying fast planes being handle-end thun dering 65 perhaps biggest modeling thrill other letter Joe Sullivan dated September 10 1983 just read column September 1983 MA asked ideas re kindle interest Speed feeling decline Speed came two phases first largest decline started advent Monoline second came use tuned pipes Let pause say started flying U-Control 1949 flew actively until 1961 have dabbled itsince however try stay current what going Yes know advantages Monoline lets look some disadvan tages 1 cannot use relatively-easy-to-find two-line hardware 2 requires expertise install Monoline control unit properly 3 Monoline handles costly difficult maintain two-line handles 4 flying line requires expertise make 5 Monoline cannot use fuel shutoff plane Think about engines have burned down lean runs 6 Two-line flying will slow planes down making easier fly fast can get around pylon probably too classes proposals follow class logical step up performance ladder proposals new Speed system I Allow two-line systems no grouped lines permitted Minimum line sep arations would cc 40 cu II Suction fuel systems Fuel shutoff suggested 35cc 40 cu classes required III Classes A A35-ft lines 1 Proto Mouse rules planes timed release completion 12 laps 2 Proto Speed Same Proto timed six laps flying start 3 Speed Full Speed ship no pipes B 3Scc60-ft lines 1 Proto Timed release plane completion 14 laps a Fixed 2-wheel gear using commercial 2-in wheels b Minimum wing area 125-150 sq c Minimum weight heavy enough easily ob tainable average modeler resort use exotic materials 2 Proto Speed Same Proto B above except time seven laps flying start 3Speed Full Speed plane C 40 cu in60-ft lines 1 Proto Same Bl above using Rat rules planes a Same B1a above bMinimumwingarea 150-200 sq c Minimum weight Use same concept B 1 c above 2 Proto Speed 3 Speed Well people Theyve shotsnow its time take couple swipes subject Remember speed natural eventjust like foot races Indy 500 NASCAR Super Stock etc rules right help promote interest participation Speed such low ebb because CL has gone out style favor RC Which comes firstthe chicken egg need contests generate interest Speed generate activity first expect find contest activity result Speak up Gene Hempel 301 N Yale Dr Garland TX 75042 170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle untli interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Eadersad IMAAShew Team requlaedea shewmedel wa SPECIFICATIONS Size KPS 1411 Servo Case Pow 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adi 0628 milliseconds Systems 3 4 wire Temp Range ca l4OaF Weight 12 oz Price $4795 PostpaId Specify cmuiecter type positive negative pulse whe orderhlsJ RF Enterprises 106 N Main St. Arlington OH 45514 419J 365-5065
Edition: Model Aviation - 1984/06
Page Numbers: 72, 168, 170
RACING FUEL have numerous formal written requests information basic fuel composition percentages used top competitors Racing event past few years have produced constant price increses fuel gredients especially nitromethane early 1970s nitro cost approximately $450 gallon contrasted 1979 prices around $2000 gallon have observed advertisements preblended fuels model magazines club newsletters racing fuel listed 40% 50% nitro content could easily cost $25-35 gallon including UPS charges Certainly Racing enthusiasts interest use amount nitro con tent fuel required produce acceptable speed good pitting respect able engine life have seen com petitors dose fuel tanks 65% 75% nitro fuel find air speed very close same 40-50% fuelplus increased problems plug life restarting stances obviously lack satisfactory air speed result other factors Basic ingredients Basic fuel components have changed drastically since early Sixties Don Hoyer sold Custom Blend racing fuel over entire Midwest area trunk car also Parcel Post Don used 5% 8% nitrobenzine co solvent ensure higher-content-nitro fuels would accept castor oil principal lubricant acute toxicity infor mation available today nitrobenzine its use fuel has halted can remember special Racing fuel very popular around Chicago area sold glass bottles called Wysongs Ithopped up As recall late Sixties Hoyer fuel blender posted nitro content fuels general lack fuel ingredients prompted competitors home brew fuel control nitro content quality ingredients demise nitrobenzine co solvent stable fuel solutions required use synthetic oils about 25% 30% nitro concentration castor oil becomes insoluble portion oil forms globules appear similar chicken fat soup No amount mixing will reincorporate oil other hand synthetic oils mixable concentrations nitro Generally synthetic oils used since middle Seventies includes Union Car bides MA-2270 MA-739 LB-625 LB-525 LB-l 100 amount oil used varies since endless opinions subject use 18% LB-625 2% Luberziene N- 1 N- 1 added im prove wetting properties synthetic oil minimize engine damage during lean runs think problem ingredient present formulas methyl alcohol methanol Typical methanol has between 2%-8% water included know methanol water scavenger humid Midwest day open fuel container will pick up another 5%-10% water Included water causes engines run hot special care must taken eliminate moisture predictable performance expected remain ing portion jug fuel used humid rainy day should set aside used rich break-in runs typi cal formula 50%-nitro fuel follows Fluid oz 256 640 384 1280 Ingredient Oil Nitromethane Methanol Total 128 fluid oz Percent mix 20 50 30 1 100 gal Keeping oil constant 20% may vary nitro alcohol required Al ways check calculation must total 128 fluid ounces Lets improve participation 1986 AMA rule book comes out Mr Jim Rick etts chairman Racing Advisory Committee RAC has sent summary provided Bill Lee basic feelings majority CL Racing competitors attended 1983 Nationals Obviously Bill has added some personal opinions certainly shared others subject Rat Race Slow Rat am including Bills letter would certainly solicit comments other Racing competitors Last year Westover signif icant conversation among Racing fliers about various changes could/should made would like list ones Im interested ask pass RAC possible sponsorship Rat Race Rat has gotten completely out realm reason few compete itand few Continued page 168 alcohol-based model fuels require special handling performance-producing qualities maintained high levels Naturally fuel should filtered being transferred container container well filler fuel tank prevent foreign particles getting models fuel system clogging obvious need keep fuel absorbing moistureespecIally humid air photo left competitor keeps big gallon fuel jug filled capped refills smaller easier-to-handle fill-bottle refuel model smaller plastic bottle just below big jug large-diameter filler tube neck photo right same fill-bottle being used reservoir smaller fuel bulb Note filter stacked over big fuel jugit appears disposable unit such found lawn mower repair shops 72 Model Aviation Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE Matcneo rerTormance ysrem TOP PERFORMANCE CAB ENGINES 16 Airplane 4 Marine KAB FUELSCAB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE CAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER CAB SUPER FOXY RESIN CAB SUPER FOXY THINNER CAB SUPER POXY PRIMER KAB SUPER POXY PAINT KAB MIXING CUPS 4 II AU ELI II 4-4 very completeconstruction balsa kit Simple gets air fast Easy fly flight perfor out sight Requires r- engine 4 ch radio Ask dealer writ 4- RICKSKlTSformoreinformationI 5 4 L II RICKS KITSP0 BoxilOS SanteeCA92071 CL Racing/Ballard Continued page 168 vides easily-built model easily flown someone virtually skill level pilot things can built minimal investment either ma terials time performance level restricted engines very reasonable around 17 seconds slower would fear model allowed given signif icant horsepower Any change must accompanied decrease available horsepower Thats end Bill Lees letter Northwest Regionals coming Winston-Salem NC AAAA Control Line Meet highlights racing season Midwest area Northwest colleagues have developed type nual contest Eugene OR Annual Northwest Regional Control Line Cham pionships over Memorial Day weekend May 26-27 1984 will feature Racing events Certainly possible should included competition calendar information write Contest Direc tor John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 73 started Speed 1967 ex-Roselle McCoy 64 ship Harry Roe Jerry Roselle Jack Frye Warren Gregory helped learn never really have threat national competition flying fast planes being handle-end thun dering 65 perhaps biggest modeling thrill other letter Joe Sullivan dated September 10 1983 just read column September 1983 MA asked ideas re kindle interest Speed feeling decline Speed came two phases first largest decline started advent Monoline second came use tuned pipes Let pause say started flying U-Control 1949 flew actively until 1961 have dabbled itsince however try stay current what going Yes know advantages Monoline lets look some disadvan tages 1 cannot use relatively-easy-to-find two-line hardware 2 requires expertise install Monoline control unit properly 3 Monoline handles costly difficult maintain two-line handles 4 flying line requires expertise make 5 Monoline cannot use fuel shutoff plane Think about engines have burned down lean runs 6 Two-line flying will slow planes down making easier fly fast can get around pylon probably too classes proposals follow class logical step up performance ladder proposals new Speed system I Allow two-line systems no grouped lines permitted Minimum line sep arations would cc 40 cu II Suction fuel systems Fuel shutoff suggested 35cc 40 cu classes required III Classes A A35-ft lines 1 Proto Mouse rules planes timed release completion 12 laps 2 Proto Speed Same Proto timed six laps flying start 3 Speed Full Speed ship no pipes B 3Scc60-ft lines 1 Proto Timed release plane completion 14 laps a Fixed 2-wheel gear using commercial 2-in wheels b Minimum wing area 125-150 sq c Minimum weight heavy enough easily ob tainable average modeler resort use exotic materials 2 Proto Speed Same Proto B above except time seven laps flying start 3Speed Full Speed plane C 40 cu in60-ft lines 1 Proto Same Bl above using Rat rules planes a Same B1a above bMinimumwingarea 150-200 sq c Minimum weight Use same concept B 1 c above 2 Proto Speed 3 Speed Well people Theyve shotsnow its time take couple swipes subject Remember speed natural eventjust like foot races Indy 500 NASCAR Super Stock etc rules right help promote interest participation Speed such low ebb because CL has gone out style favor RC Which comes firstthe chicken egg need contests generate interest Speed generate activity first expect find contest activity result Speak up Gene Hempel 301 N Yale Dr Garland TX 75042 170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle untli interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Eadersad IMAAShew Team requlaedea shewmedel wa SPECIFICATIONS Size KPS 1411 Servo Case Pow 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adi 0628 milliseconds Systems 3 4 wire Temp Range ca l4OaF Weight 12 oz Price $4795 PostpaId Specify cmuiecter type positive negative pulse whe orderhlsJ RF Enterprises 106 N Main St. Arlington OH 45514 419J 365-5065
Edition: Model Aviation - 1984/06
Page Numbers: 72, 168, 170
RACING FUEL have numerous formal written requests information basic fuel composition percentages used top competitors Racing event past few years have produced constant price increses fuel gredients especially nitromethane early 1970s nitro cost approximately $450 gallon contrasted 1979 prices around $2000 gallon have observed advertisements preblended fuels model magazines club newsletters racing fuel listed 40% 50% nitro content could easily cost $25-35 gallon including UPS charges Certainly Racing enthusiasts interest use amount nitro con tent fuel required produce acceptable speed good pitting respect able engine life have seen com petitors dose fuel tanks 65% 75% nitro fuel find air speed very close same 40-50% fuelplus increased problems plug life restarting stances obviously lack satisfactory air speed result other factors Basic ingredients Basic fuel components have changed drastically since early Sixties Don Hoyer sold Custom Blend racing fuel over entire Midwest area trunk car also Parcel Post Don used 5% 8% nitrobenzine co solvent ensure higher-content-nitro fuels would accept castor oil principal lubricant acute toxicity infor mation available today nitrobenzine its use fuel has halted can remember special Racing fuel very popular around Chicago area sold glass bottles called Wysongs Ithopped up As recall late Sixties Hoyer fuel blender posted nitro content fuels general lack fuel ingredients prompted competitors home brew fuel control nitro content quality ingredients demise nitrobenzine co solvent stable fuel solutions required use synthetic oils about 25% 30% nitro concentration castor oil becomes insoluble portion oil forms globules appear similar chicken fat soup No amount mixing will reincorporate oil other hand synthetic oils mixable concentrations nitro Generally synthetic oils used since middle Seventies includes Union Car bides MA-2270 MA-739 LB-625 LB-525 LB-l 100 amount oil used varies since endless opinions subject use 18% LB-625 2% Luberziene N- 1 N- 1 added im prove wetting properties synthetic oil minimize engine damage during lean runs think problem ingredient present formulas methyl alcohol methanol Typical methanol has between 2%-8% water included know methanol water scavenger humid Midwest day open fuel container will pick up another 5%-10% water Included water causes engines run hot special care must taken eliminate moisture predictable performance expected remain ing portion jug fuel used humid rainy day should set aside used rich break-in runs typi cal formula 50%-nitro fuel follows Fluid oz 256 640 384 1280 Ingredient Oil Nitromethane Methanol Total 128 fluid oz Percent mix 20 50 30 1 100 gal Keeping oil constant 20% may vary nitro alcohol required Al ways check calculation must total 128 fluid ounces Lets improve participation 1986 AMA rule book comes out Mr Jim Rick etts chairman Racing Advisory Committee RAC has sent summary provided Bill Lee basic feelings majority CL Racing competitors attended 1983 Nationals Obviously Bill has added some personal opinions certainly shared others subject Rat Race Slow Rat am including Bills letter would certainly solicit comments other Racing competitors Last year Westover signif icant conversation among Racing fliers about various changes could/should made would like list ones Im interested ask pass RAC possible sponsorship Rat Race Rat has gotten completely out realm reason few compete itand few Continued page 168 alcohol-based model fuels require special handling performance-producing qualities maintained high levels Naturally fuel should filtered being transferred container container well filler fuel tank prevent foreign particles getting models fuel system clogging obvious need keep fuel absorbing moistureespecIally humid air photo left competitor keeps big gallon fuel jug filled capped refills smaller easier-to-handle fill-bottle refuel model smaller plastic bottle just below big jug large-diameter filler tube neck photo right same fill-bottle being used reservoir smaller fuel bulb Note filter stacked over big fuel jugit appears disposable unit such found lawn mower repair shops 72 Model Aviation Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE Matcneo rerTormance ysrem TOP PERFORMANCE CAB ENGINES 16 Airplane 4 Marine KAB FUELSCAB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE CAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER CAB SUPER FOXY RESIN CAB SUPER FOXY THINNER CAB SUPER POXY PRIMER KAB SUPER POXY PAINT KAB MIXING CUPS 4 II AU ELI II 4-4 very completeconstruction balsa kit Simple gets air fast Easy fly flight perfor out sight Requires r- engine 4 ch radio Ask dealer writ 4- RICKSKlTSformoreinformationI 5 4 L II RICKS KITSP0 BoxilOS SanteeCA92071 CL Racing/Ballard Continued page 168 vides easily-built model easily flown someone virtually skill level pilot things can built minimal investment either ma terials time performance level restricted engines very reasonable around 17 seconds slower would fear model allowed given signif icant horsepower Any change must accompanied decrease available horsepower Thats end Bill Lees letter Northwest Regionals coming Winston-Salem NC AAAA Control Line Meet highlights racing season Midwest area Northwest colleagues have developed type nual contest Eugene OR Annual Northwest Regional Control Line Cham pionships over Memorial Day weekend May 26-27 1984 will feature Racing events Certainly possible should included competition calendar information write Contest Direc tor John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 As always comments appreci ated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 73 started Speed 1967 ex-Roselle McCoy 64 ship Harry Roe Jerry Roselle Jack Frye Warren Gregory helped learn never really have threat national competition flying fast planes being handle-end thun dering 65 perhaps biggest modeling thrill other letter Joe Sullivan dated September 10 1983 just read column September 1983 MA asked ideas re kindle interest Speed feeling decline Speed came two phases first largest decline started advent Monoline second came use tuned pipes Let pause say started flying U-Control 1949 flew actively until 1961 have dabbled itsince however try stay current what going Yes know advantages Monoline lets look some disadvan tages 1 cannot use relatively-easy-to-find two-line hardware 2 requires expertise install Monoline control unit properly 3 Monoline handles costly difficult maintain two-line handles 4 flying line requires expertise make 5 Monoline cannot use fuel shutoff plane Think about engines have burned down lean runs 6 Two-line flying will slow planes down making easier fly fast can get around pylon probably too classes proposals follow class logical step up performance ladder proposals new Speed system I Allow two-line systems no grouped lines permitted Minimum line sep arations would cc 40 cu II Suction fuel systems Fuel shutoff suggested 35cc 40 cu classes required III Classes A A35-ft lines 1 Proto Mouse rules planes timed release completion 12 laps 2 Proto Speed Same Proto timed six laps flying start 3 Speed Full Speed ship no pipes B 3Scc60-ft lines 1 Proto Timed release plane completion 14 laps a Fixed 2-wheel gear using commercial 2-in wheels b Minimum wing area 125-150 sq c Minimum weight heavy enough easily ob tainable average modeler resort use exotic materials 2 Proto Speed Same Proto B above except time seven laps flying start 3Speed Full Speed plane C 40 cu in60-ft lines 1 Proto Same Bl above using Rat rules planes a Same B1a above bMinimumwingarea 150-200 sq c Minimum weight Use same concept B 1 c above 2 Proto Speed 3 Speed Well people Theyve shotsnow its time take couple swipes subject Remember speed natural eventjust like foot races Indy 500 NASCAR Super Stock etc rules right help promote interest participation Speed such low ebb because CL has gone out style favor RC Which comes firstthe chicken egg need contests generate interest Speed generate activity first expect find contest activity result Speak up Gene Hempel 301 N Yale Dr Garland TX 75042 170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle untli interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Eadersad IMAAShew Team requlaedea shewmedel wa SPECIFICATIONS Size KPS 1411 Servo Case Pow 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adi 0628 milliseconds Systems 3 4 wire Temp Range ca l4OaF Weight 12 oz Price $4795 PostpaId Specify cmuiecter type positive negative pulse whe orderhlsJ RF Enterprises 106 N Main St. Arlington OH 45514 419J 365-5065