Control Line SPEED Gene Hempel THIS COLUMN next will devoted article written Charlie Lieber Morres town NJ member American FAI Speed team FAI team trials held Seguin during Nats asked Charlie would willing share some valuable FAI information construction techniques Recently Charlie bestowed upon fantas tic article sharing readers columb Introduction FAI Speed event history rational rules having enough leeway challenge fliers bent towards experi mentation reward FAI flying travel foreign lands truly international competi tion history FAI speed attainment over past several years shown illus trations have noted some advances state art used achieve speeds best American times also noted indicating clear superiority Europeans during period increases speed due small changes giving cleaner airplanes reliable repeatable operation course horsepower what follows will try outline some problems solutions have tried experience what has worked what hasnt way may possible stimulate independent thinking along new avenues ap proach preventing some excursions down blind alleys flight system basic system airplane pilot lines engine propeller can tied together shown below clearly written explanation details may found Reference 1 1 TDLDPDA 2 PxETxV V d ft per sec T thrust lbs DL drag lbs Dp t drag lbs DA airplane drag lbs P ne output power ft-lbs per sec E efficiency 550 foot-pounds per second equals horsepower hp terms horsepower various contributors pilot action Chuck Schuette Woodvale England 1 97g inc i-Al pyion use Ins siae nandle rest notch-shaped recesses pylon portable pylon used atthe 1978 World Champs 58 Model Aviation Speed team thatwill representthe USA 1 92 World Championships Sweden Lettto right Chuck Schuette Charlie Lieber Carl Dodge Photo taken 1981 Team Trials Texas engine power absorption have plotted Fig 2 essetitially plot Equation 1 Flying lines Fig 2 obvious line drag DL largest consumer engine hp has recognized least far back 19502 Examination aerodynamics wires shows grouping together shown Fig 3 results about half line drag Examination Fig 2 will indicate large resultant speed gains fixed hp prop efficiency result theoretical speeds attained competition mutual consent fliers because excessive speed potential general difficulty construction groupers ruled out Today lines must physically separated both wing exit handle Noting drag ofthe lines dependent length lines exposed airflow experimenters have turned long asymmetric wing model theory indicates significant increases speed can attained trading wing drag line drag Tests Carl Dodge did confirm paper analysis tried series experiments line covers shown figure 4 extended wing regular plane up five feet After solving some flutter problems able measure change performance dead end possible relatively high aspect ratio wings somewhat high thickness-to-chord ratio produce drag indicated theory would think dead end based American result Hungarian fliers have produced speeds excess 165 mph using 6-ft wings Would Hungarians go fast short wings didnt theory hold up Dodge Lieber experiments Consid ering potential advantages must still looked prime area serious investigation pilot Fig 2 pilot drag curve results model being flown near FAI upper altitude limit Consider model being flown constant altitude shown Fig 5 forces acting model must balance model Continued page 153 July 198259 FROM PICA LIP 1059 oz tive minute epoxy difference sandable epoxy available Compatible resin coating has new flip-top cap Industrial Strength 100% uncut resin FOR ThE NEWCOMER Its super stable gentle faster building JIRPIEmore versatile Wing version R~Lxtended Wing Span 50 area 565 sq inches Fuselage 44V2 inches Extended Wing VersionWeight 4-4V2 pounds Wing Span 54 area 615 sq inches Engine 25-40 SPECIFICATIONS GLUIT HIP 601 12 oz heavy duty aliphatic white glue especially formulated modelers Its sandable fast drying truly heavy duty Its great hardwood plywood fiber materials subject high on1 torque pare airplane have take care million small details like getting off work seeing can get model airplane fuel over Europeyou cant just drag four gallons Dukes fuel board airline Stunter probably costs competitors upwards $100000 personal money little things like travel within United States helping out travel site have rent vans get living quarters flying sites missed team meals AMA pays travel New York Europe pays entry fees World Champs covers lodging food Championships site pays some fees transport airplane box also has some funds available practice time helps out travel within US help incidentals come out team members pocket Still its great honor make team writer tried six times before finally getting team 1980 worth minute spent Once team gets Champonship site great experience meeting modelers over World Italian team friendly bunch fliers have great food pit area fix delicious spaghetti back rooms 1980 Polish team treated Americans cocktail party featured some spirits rolled back eyelids such experienced consumers Les Bill Chinese team showed up 1980 event some good fliers will get better better Japanese team real fun group also has several good fliers Canadian team probably has fun team Championships led Fred Tellierwho also DUAL PERSONAUTY TRAINER GEENIS BEAUTIFUL SUPER CHAMP DEALERt DisrRiBurog INQuIRItS INVITED WS 54 20 35 tNGINES 3 CHANNEL THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolubonary snap on wing eliminates bolts rnbber bands Complete kit $5495 dealer direct GEMINI MODELS INC keeps improving year flying also some very good fliers Czecho slovakia United Kingdom Hungary France Rodrigues Brazil young eager learn must three zillion pictures posed snapped World Cham pionships best luck 1982 USA FAT Aerobatics Team defending champion Les McDonald Any four could come back World champion could strongest team effort ever assembled Sweden should good site Championships Put up some good ones men information Precision Aerobatics PA MPA contact WvnnPaui 1640 Wavwick Dr Lexington KY 40504 CL Speed/Hempel Continued vaqe 59 will either move up down out Note lift force wings must balance weight model must also balance part line tension acting model doing model generates drag due lift called induced drag speed penalized Conversely some constant flight altitude allows lift go zero because line tension balances model weight Using fig 5 has shown4 distance below pylon level pilot should fly airplane minimize drag 3 dR2g/V2 d distance below pylon ft R 52 ft line length V lane speed feet per second example 165 mph 242 feet per second distance d 149 ft pilot-induced drag AT LAST! ES AND BEAR NGS WDAMACE MAKE NEINE OvERIIAUL PIECE OE CAKE FXPANOINC RING SlIDE TAPPER SLEEVE PULLER 1514 Id SI/L ENGINE795 BEARING PULLER SR 7IM REARING695 Special Order Both For1395 send check MD Include SOC UPOI GATOR R/C PRODUCTS flsPoNc 0 PENSOC 11* rI 12504 billgers SNOW WHITE 20 Joe Rasyantes beactriul model SNOW WHITE won enery beauty contest entered late 1930s Featured charles Grants Model Design teolbook 314 size version perfect modern N/C flying Weoe many requests 15 35 Engines 3 Channel ft/C Speten. 68 WIngspan . 700 Sq Wing Area . 4 Lb. Foil Size PLAN N PATTERN SET RcFF7 $1495 Prices urn complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tobe Details new designs & great things come send 50 Iretundablef br information July 1982 153 657 NE tt8rn St Mains floiaa 33160 IeieDhcirie 935 1436 MODELIvIANIA ORoESESEND NSSCS RD BPEoaILVN leA V. 222 13399250 NO COLLECT CAILS HEiRESS E 13 & C 14 StS P1 STATEN ISLAIM TAKE VERRIZAI TO SELT FIlMY EAST ClMEY ISLEID AVE EIIT TO AVE RUST US TO N 3 StOCKS TO ST SEEN l& lED 12 TO 9TIES & TIOMS 12 TO 545 FRI 12 TO 7 & SAT 10 TO 6 00t HIGH POINT FSSE/SPIIOER BALANCES PROTECT YIGA ECOSICES USE TIE REST24951995 002DOG PSODIETS PERHA USIT 2 TYPES FLAT US RAGIUSIPIIE/C9MSS ORtT ON ROTH EITHER lME6954950 BUY SET PLAT RADIUSSET SE 2595 003IIORLO EI81ICES 521 SERVO SE PLUS24951295 AS AROVE WITH FUTARA PLUS29951595 004AIStREWS TRAICERHASTER67953995 005ASSOCIATED 12E S/C CAR 18 CELLBATI LESS BOGY & RADIO128007495 SAVE TIlE PHWE Y011S USGER 11112121 3399250 006 SUSI CLEAR 6 1/S SIZE OWES USILL330 255 00765/32395299 000 -83/16 470379 009 67/32 '520399 010"81/4"550429 011 OUSt O.EAR121/5-900599 012125/32-068639 013123/16 '910699 014 '127/331045029 025 '121/4 "1130099 ORE DIM tEll 101 SPECIAL LIST OVER 150 PiMEFACThS 01601MC TARIiA 4 IOESI TOYOTA SPECIAL WFERI ItlmES MTTESIES AND CHARGER25999 5 2 RE t AND SAVE 1000 EACH24999 2 tIAS/USGES PUS SHIPPING PIWOWES 017 ElI AIR CLEARER PRE MOST S LARGER CS FIfE PUS AISCSWT225179 REPLENT FILTERS 2/PACK195129 010 ZIt US TOFFLITE 10 PRWS 159 109 PUS PASTES SERVICE PIE YOW USOER IN 2123399250 HASTERCARD AND VISA TED SEMI ALL ORGERS AND INGIJIRES TO ISPEODICLYN S MODGEL SISSTEPESE 1O GRJSLSEGENO MSECI RD BROOICLYFI N 1122YP ALL PRICES SUOECT TO OWNIE IWPEA GOOD TIL 30TH SE PUS lTH 180.ESS CIIT SIPPLIES AlE EIIWISTEG FREE 101 SPECIALSLIST 111TH USS US SEND SASS USING OFFORHATIUS OY NO COG ALL PRICES INCLUGE 55 CASH GISCOLSIT 11111 RET ORGER 515CREDIT CARD USERS PLEASE ADD 57 TO TOTAL IIUDE CARGO EXPIRATIUS DATE INTER RSAOC 0 6 SIUSATl SHIPPING & HASOLINO 1500 5000 ADD 4SO OVER 5000 ADO 97 MAO IS 1050 & 25 LBS 0 OVERSIZE 000 ASS $400JT SE CUST US AGO 155 OP TOTAL PUS SHIPPING ALL MONIES 181ST GE IN US C1IEY SALES ARE FINAL ALLOW TIRE PUS PERSONAL CHECKS TO CLEAR NY RESIGENTS P81ST ADO ARPLICADLE SALES TAOSEND SASE PUS ALL INWJIRES SPECIFY SIZE COLUS AND TYPE WHERE REQUIRED PO Son 1189 Passaic NJ 07055 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/G its standard reference book L6 Will Ever Need Available through local hobby shop use coupon p-I end copy new RADIO CONTROL BUYERS GUIDE Please check Li Enclosed $950 $795 plus $155 postage US & canada dians send US funds VA residents add 4% sales las Li charge Li Mastercharge Li] visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton Virginia 22024 1 Kraft RIC Electronics Lii Low Repair Costs rcuM~i Kraft Customers MAXIMUM Service Charges 4-7 channel systems$3250 2 channel systems$2650 Parts Shipping Extra 1685 Beckwith Dr Hudson OH 44236 Servo reversing now available 7C & 7CS 1976-81 transmitters aileron elevator rudder throttle $3500 216 655-2278 altitude zero speed high flier would going 1575 mph possible practice flying exclusively FAI pylon style order make both steady flight low flight natural thing under weather conditions Thanks Charlie Thats month guys rest article will appear next Speed column Meanwhile suggest start looking flying FAI Speed very challenging Gene HempeL 301 N Yale Dr Garlan4 TX 75042 CL Navy Carrier/Perry Continued page 60 engine has large-bore carburetor should readily adaptable Carrier operation using pump exhaust pressure bore 105mm narrow 22mm spraybar effective choke area substantial 64 sq mm in-flight adjustable needle valve feature can readily bypassed conventional three-line operation crankcase 170 43mm wide bolt spacing205 52mm 985 25mm Richard L Perry 46 Woodhill Dr Golds boro NC 27530 Extra Hands/Jennings Continued paae 61 electrical solderless ring tongue Loop control line through around again through crimping eye lug crimp lug other end control line make normal soldered leadout-constructed loop about inch diameter Make tether aircraft tether should attached solid struc ture rear aircraft use cap screw blind nut sure glue threads prevent vibration backing screw out will need purchase long-shank screw driver shank must 3/16-in diameter less Normally blade must ground down will go through release look Safe- Loc closely will see well-designed features positive opening action safety lock mechanism Upon first look difficult see operates safety mode starting engine adjusting needle valve mode air craft can rest ground held vertical position will allow fine-tuning needle valve ready mode used after engine running correctly aircraft resting ground Check see tether loop right position Release safety catch pick up control handle Pick up release handle Tug lightly triggers launch aircraft immediately starts moving forward own After finished flying release can packed up quickly easily fits compactly field box release allows go flying yourself safety mechanism positive opening action assures operating want SAFE FLYING IS NO ACCIDENT 154 Model Aviation
Edition: Model Aviation - 1982/07
Page Numbers: 58, 59, 153, 154
Control Line SPEED Gene Hempel THIS COLUMN next will devoted article written Charlie Lieber Morres town NJ member American FAI Speed team FAI team trials held Seguin during Nats asked Charlie would willing share some valuable FAI information construction techniques Recently Charlie bestowed upon fantas tic article sharing readers columb Introduction FAI Speed event history rational rules having enough leeway challenge fliers bent towards experi mentation reward FAI flying travel foreign lands truly international competi tion history FAI speed attainment over past several years shown illus trations have noted some advances state art used achieve speeds best American times also noted indicating clear superiority Europeans during period increases speed due small changes giving cleaner airplanes reliable repeatable operation course horsepower what follows will try outline some problems solutions have tried experience what has worked what hasnt way may possible stimulate independent thinking along new avenues ap proach preventing some excursions down blind alleys flight system basic system airplane pilot lines engine propeller can tied together shown below clearly written explanation details may found Reference 1 1 TDLDPDA 2 PxETxV V d ft per sec T thrust lbs DL drag lbs Dp t drag lbs DA airplane drag lbs P ne output power ft-lbs per sec E efficiency 550 foot-pounds per second equals horsepower hp terms horsepower various contributors pilot action Chuck Schuette Woodvale England 1 97g inc i-Al pyion use Ins siae nandle rest notch-shaped recesses pylon portable pylon used atthe 1978 World Champs 58 Model Aviation Speed team thatwill representthe USA 1 92 World Championships Sweden Lettto right Chuck Schuette Charlie Lieber Carl Dodge Photo taken 1981 Team Trials Texas engine power absorption have plotted Fig 2 essetitially plot Equation 1 Flying lines Fig 2 obvious line drag DL largest consumer engine hp has recognized least far back 19502 Examination aerodynamics wires shows grouping together shown Fig 3 results about half line drag Examination Fig 2 will indicate large resultant speed gains fixed hp prop efficiency result theoretical speeds attained competition mutual consent fliers because excessive speed potential general difficulty construction groupers ruled out Today lines must physically separated both wing exit handle Noting drag ofthe lines dependent length lines exposed airflow experimenters have turned long asymmetric wing model theory indicates significant increases speed can attained trading wing drag line drag Tests Carl Dodge did confirm paper analysis tried series experiments line covers shown figure 4 extended wing regular plane up five feet After solving some flutter problems able measure change performance dead end possible relatively high aspect ratio wings somewhat high thickness-to-chord ratio produce drag indicated theory would think dead end based American result Hungarian fliers have produced speeds excess 165 mph using 6-ft wings Would Hungarians go fast short wings didnt theory hold up Dodge Lieber experiments Consid ering potential advantages must still looked prime area serious investigation pilot Fig 2 pilot drag curve results model being flown near FAI upper altitude limit Consider model being flown constant altitude shown Fig 5 forces acting model must balance model Continued page 153 July 198259 FROM PICA LIP 1059 oz tive minute epoxy difference sandable epoxy available Compatible resin coating has new flip-top cap Industrial Strength 100% uncut resin FOR ThE NEWCOMER Its super stable gentle faster building JIRPIEmore versatile Wing version R~Lxtended Wing Span 50 area 565 sq inches Fuselage 44V2 inches Extended Wing VersionWeight 4-4V2 pounds Wing Span 54 area 615 sq inches Engine 25-40 SPECIFICATIONS GLUIT HIP 601 12 oz heavy duty aliphatic white glue especially formulated modelers Its sandable fast drying truly heavy duty Its great hardwood plywood fiber materials subject high on1 torque pare airplane have take care million small details like getting off work seeing can get model airplane fuel over Europeyou cant just drag four gallons Dukes fuel board airline Stunter probably costs competitors upwards $100000 personal money little things like travel within United States helping out travel site have rent vans get living quarters flying sites missed team meals AMA pays travel New York Europe pays entry fees World Champs covers lodging food Championships site pays some fees transport airplane box also has some funds available practice time helps out travel within US help incidentals come out team members pocket Still its great honor make team writer tried six times before finally getting team 1980 worth minute spent Once team gets Champonship site great experience meeting modelers over World Italian team friendly bunch fliers have great food pit area fix delicious spaghetti back rooms 1980 Polish team treated Americans cocktail party featured some spirits rolled back eyelids such experienced consumers Les Bill Chinese team showed up 1980 event some good fliers will get better better Japanese team real fun group also has several good fliers Canadian team probably has fun team Championships led Fred Tellierwho also DUAL PERSONAUTY TRAINER GEENIS BEAUTIFUL SUPER CHAMP DEALERt DisrRiBurog INQuIRItS INVITED WS 54 20 35 tNGINES 3 CHANNEL THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolubonary snap on wing eliminates bolts rnbber bands Complete kit $5495 dealer direct GEMINI MODELS INC keeps improving year flying also some very good fliers Czecho slovakia United Kingdom Hungary France Rodrigues Brazil young eager learn must three zillion pictures posed snapped World Cham pionships best luck 1982 USA FAT Aerobatics Team defending champion Les McDonald Any four could come back World champion could strongest team effort ever assembled Sweden should good site Championships Put up some good ones men information Precision Aerobatics PA MPA contact WvnnPaui 1640 Wavwick Dr Lexington KY 40504 CL Speed/Hempel Continued vaqe 59 will either move up down out Note lift force wings must balance weight model must also balance part line tension acting model doing model generates drag due lift called induced drag speed penalized Conversely some constant flight altitude allows lift go zero because line tension balances model weight Using fig 5 has shown4 distance below pylon level pilot should fly airplane minimize drag 3 dR2g/V2 d distance below pylon ft R 52 ft line length V lane speed feet per second example 165 mph 242 feet per second distance d 149 ft pilot-induced drag AT LAST! ES AND BEAR NGS WDAMACE MAKE NEINE OvERIIAUL PIECE OE CAKE FXPANOINC RING SlIDE TAPPER SLEEVE PULLER 1514 Id SI/L ENGINE795 BEARING PULLER SR 7IM REARING695 Special Order Both For1395 send check MD Include SOC UPOI GATOR R/C PRODUCTS flsPoNc 0 PENSOC 11* rI 12504 billgers SNOW WHITE 20 Joe Rasyantes beactriul model SNOW WHITE won enery beauty contest entered late 1930s Featured charles Grants Model Design teolbook 314 size version perfect modern N/C flying Weoe many requests 15 35 Engines 3 Channel ft/C Speten. 68 WIngspan . 700 Sq Wing Area . 4 Lb. Foil Size PLAN N PATTERN SET RcFF7 $1495 Prices urn complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tobe Details new designs & great things come send 50 Iretundablef br information July 1982 153 657 NE tt8rn St Mains floiaa 33160 IeieDhcirie 935 1436 MODELIvIANIA ORoESESEND NSSCS RD BPEoaILVN leA V. 222 13399250 NO COLLECT CAILS HEiRESS E 13 & C 14 StS P1 STATEN ISLAIM TAKE VERRIZAI TO SELT FIlMY EAST ClMEY ISLEID AVE EIIT TO AVE RUST US TO N 3 StOCKS TO ST SEEN l& lED 12 TO 9TIES & TIOMS 12 TO 545 FRI 12 TO 7 & SAT 10 TO 6 00t HIGH POINT FSSE/SPIIOER BALANCES PROTECT YIGA ECOSICES USE TIE REST24951995 002DOG PSODIETS PERHA USIT 2 TYPES FLAT US RAGIUSIPIIE/C9MSS ORtT ON ROTH EITHER lME6954950 BUY SET PLAT RADIUSSET SE 2595 003IIORLO EI81ICES 521 SERVO SE PLUS24951295 AS AROVE WITH FUTARA PLUS29951595 004AIStREWS TRAICERHASTER67953995 005ASSOCIATED 12E S/C CAR 18 CELLBATI LESS BOGY & RADIO128007495 SAVE TIlE PHWE Y011S USGER 11112121 3399250 006 SUSI CLEAR 6 1/S SIZE OWES USILL330 255 00765/32395299 000 -83/16 470379 009 67/32 '520399 010"81/4"550429 011 OUSt O.EAR121/5-900599 012125/32-068639 013123/16 '910699 014 '127/331045029 025 '121/4 "1130099 ORE DIM tEll 101 SPECIAL LIST OVER 150 PiMEFACThS 01601MC TARIiA 4 IOESI TOYOTA SPECIAL WFERI ItlmES MTTESIES AND CHARGER25999 5 2 RE t AND SAVE 1000 EACH24999 2 tIAS/USGES PUS SHIPPING PIWOWES 017 ElI AIR CLEARER PRE MOST S LARGER CS FIfE PUS AISCSWT225179 REPLENT FILTERS 2/PACK195129 010 ZIt US TOFFLITE 10 PRWS 159 109 PUS PASTES SERVICE PIE YOW USOER IN 2123399250 HASTERCARD AND VISA TED SEMI ALL ORGERS AND INGIJIRES TO ISPEODICLYN S MODGEL SISSTEPESE 1O GRJSLSEGENO MSECI RD BROOICLYFI N 1122YP ALL PRICES SUOECT TO OWNIE IWPEA GOOD TIL 30TH SE PUS lTH 180.ESS CIIT SIPPLIES AlE EIIWISTEG FREE 101 SPECIALSLIST 111TH USS US SEND SASS USING OFFORHATIUS OY NO COG ALL PRICES INCLUGE 55 CASH GISCOLSIT 11111 RET ORGER 515CREDIT CARD USERS PLEASE ADD 57 TO TOTAL IIUDE CARGO EXPIRATIUS DATE INTER RSAOC 0 6 SIUSATl SHIPPING & HASOLINO 1500 5000 ADD 4SO OVER 5000 ADO 97 MAO IS 1050 & 25 LBS 0 OVERSIZE 000 ASS $400JT SE CUST US AGO 155 OP TOTAL PUS SHIPPING ALL MONIES 181ST GE IN US C1IEY SALES ARE FINAL ALLOW TIRE PUS PERSONAL CHECKS TO CLEAR NY RESIGENTS P81ST ADO ARPLICADLE SALES TAOSEND SASE PUS ALL INWJIRES SPECIFY SIZE COLUS AND TYPE WHERE REQUIRED PO Son 1189 Passaic NJ 07055 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/G its standard reference book L6 Will Ever Need Available through local hobby shop use coupon p-I end copy new RADIO CONTROL BUYERS GUIDE Please check Li Enclosed $950 $795 plus $155 postage US & canada dians send US funds VA residents add 4% sales las Li charge Li Mastercharge Li] visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton Virginia 22024 1 Kraft RIC Electronics Lii Low Repair Costs rcuM~i Kraft Customers MAXIMUM Service Charges 4-7 channel systems$3250 2 channel systems$2650 Parts Shipping Extra 1685 Beckwith Dr Hudson OH 44236 Servo reversing now available 7C & 7CS 1976-81 transmitters aileron elevator rudder throttle $3500 216 655-2278 altitude zero speed high flier would going 1575 mph possible practice flying exclusively FAI pylon style order make both steady flight low flight natural thing under weather conditions Thanks Charlie Thats month guys rest article will appear next Speed column Meanwhile suggest start looking flying FAI Speed very challenging Gene HempeL 301 N Yale Dr Garlan4 TX 75042 CL Navy Carrier/Perry Continued page 60 engine has large-bore carburetor should readily adaptable Carrier operation using pump exhaust pressure bore 105mm narrow 22mm spraybar effective choke area substantial 64 sq mm in-flight adjustable needle valve feature can readily bypassed conventional three-line operation crankcase 170 43mm wide bolt spacing205 52mm 985 25mm Richard L Perry 46 Woodhill Dr Golds boro NC 27530 Extra Hands/Jennings Continued paae 61 electrical solderless ring tongue Loop control line through around again through crimping eye lug crimp lug other end control line make normal soldered leadout-constructed loop about inch diameter Make tether aircraft tether should attached solid struc ture rear aircraft use cap screw blind nut sure glue threads prevent vibration backing screw out will need purchase long-shank screw driver shank must 3/16-in diameter less Normally blade must ground down will go through release look Safe- Loc closely will see well-designed features positive opening action safety lock mechanism Upon first look difficult see operates safety mode starting engine adjusting needle valve mode air craft can rest ground held vertical position will allow fine-tuning needle valve ready mode used after engine running correctly aircraft resting ground Check see tether loop right position Release safety catch pick up control handle Pick up release handle Tug lightly triggers launch aircraft immediately starts moving forward own After finished flying release can packed up quickly easily fits compactly field box release allows go flying yourself safety mechanism positive opening action assures operating want SAFE FLYING IS NO ACCIDENT 154 Model Aviation
Edition: Model Aviation - 1982/07
Page Numbers: 58, 59, 153, 154
Control Line SPEED Gene Hempel THIS COLUMN next will devoted article written Charlie Lieber Morres town NJ member American FAI Speed team FAI team trials held Seguin during Nats asked Charlie would willing share some valuable FAI information construction techniques Recently Charlie bestowed upon fantas tic article sharing readers columb Introduction FAI Speed event history rational rules having enough leeway challenge fliers bent towards experi mentation reward FAI flying travel foreign lands truly international competi tion history FAI speed attainment over past several years shown illus trations have noted some advances state art used achieve speeds best American times also noted indicating clear superiority Europeans during period increases speed due small changes giving cleaner airplanes reliable repeatable operation course horsepower what follows will try outline some problems solutions have tried experience what has worked what hasnt way may possible stimulate independent thinking along new avenues ap proach preventing some excursions down blind alleys flight system basic system airplane pilot lines engine propeller can tied together shown below clearly written explanation details may found Reference 1 1 TDLDPDA 2 PxETxV V d ft per sec T thrust lbs DL drag lbs Dp t drag lbs DA airplane drag lbs P ne output power ft-lbs per sec E efficiency 550 foot-pounds per second equals horsepower hp terms horsepower various contributors pilot action Chuck Schuette Woodvale England 1 97g inc i-Al pyion use Ins siae nandle rest notch-shaped recesses pylon portable pylon used atthe 1978 World Champs 58 Model Aviation Speed team thatwill representthe USA 1 92 World Championships Sweden Lettto right Chuck Schuette Charlie Lieber Carl Dodge Photo taken 1981 Team Trials Texas engine power absorption have plotted Fig 2 essetitially plot Equation 1 Flying lines Fig 2 obvious line drag DL largest consumer engine hp has recognized least far back 19502 Examination aerodynamics wires shows grouping together shown Fig 3 results about half line drag Examination Fig 2 will indicate large resultant speed gains fixed hp prop efficiency result theoretical speeds attained competition mutual consent fliers because excessive speed potential general difficulty construction groupers ruled out Today lines must physically separated both wing exit handle Noting drag ofthe lines dependent length lines exposed airflow experimenters have turned long asymmetric wing model theory indicates significant increases speed can attained trading wing drag line drag Tests Carl Dodge did confirm paper analysis tried series experiments line covers shown figure 4 extended wing regular plane up five feet After solving some flutter problems able measure change performance dead end possible relatively high aspect ratio wings somewhat high thickness-to-chord ratio produce drag indicated theory would think dead end based American result Hungarian fliers have produced speeds excess 165 mph using 6-ft wings Would Hungarians go fast short wings didnt theory hold up Dodge Lieber experiments Consid ering potential advantages must still looked prime area serious investigation pilot Fig 2 pilot drag curve results model being flown near FAI upper altitude limit Consider model being flown constant altitude shown Fig 5 forces acting model must balance model Continued page 153 July 198259 FROM PICA LIP 1059 oz tive minute epoxy difference sandable epoxy available Compatible resin coating has new flip-top cap Industrial Strength 100% uncut resin FOR ThE NEWCOMER Its super stable gentle faster building JIRPIEmore versatile Wing version R~Lxtended Wing Span 50 area 565 sq inches Fuselage 44V2 inches Extended Wing VersionWeight 4-4V2 pounds Wing Span 54 area 615 sq inches Engine 25-40 SPECIFICATIONS GLUIT HIP 601 12 oz heavy duty aliphatic white glue especially formulated modelers Its sandable fast drying truly heavy duty Its great hardwood plywood fiber materials subject high on1 torque pare airplane have take care million small details like getting off work seeing can get model airplane fuel over Europeyou cant just drag four gallons Dukes fuel board airline Stunter probably costs competitors upwards $100000 personal money little things like travel within United States helping out travel site have rent vans get living quarters flying sites missed team meals AMA pays travel New York Europe pays entry fees World Champs covers lodging food Championships site pays some fees transport airplane box also has some funds available practice time helps out travel within US help incidentals come out team members pocket Still its great honor make team writer tried six times before finally getting team 1980 worth minute spent Once team gets Champonship site great experience meeting modelers over World Italian team friendly bunch fliers have great food pit area fix delicious spaghetti back rooms 1980 Polish team treated Americans cocktail party featured some spirits rolled back eyelids such experienced consumers Les Bill Chinese team showed up 1980 event some good fliers will get better better Japanese team real fun group also has several good fliers Canadian team probably has fun team Championships led Fred Tellierwho also DUAL PERSONAUTY TRAINER GEENIS BEAUTIFUL SUPER CHAMP DEALERt DisrRiBurog INQuIRItS INVITED WS 54 20 35 tNGINES 3 CHANNEL THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolubonary snap on wing eliminates bolts rnbber bands Complete kit $5495 dealer direct GEMINI MODELS INC keeps improving year flying also some very good fliers Czecho slovakia United Kingdom Hungary France Rodrigues Brazil young eager learn must three zillion pictures posed snapped World Cham pionships best luck 1982 USA FAT Aerobatics Team defending champion Les McDonald Any four could come back World champion could strongest team effort ever assembled Sweden should good site Championships Put up some good ones men information Precision Aerobatics PA MPA contact WvnnPaui 1640 Wavwick Dr Lexington KY 40504 CL Speed/Hempel Continued vaqe 59 will either move up down out Note lift force wings must balance weight model must also balance part line tension acting model doing model generates drag due lift called induced drag speed penalized Conversely some constant flight altitude allows lift go zero because line tension balances model weight Using fig 5 has shown4 distance below pylon level pilot should fly airplane minimize drag 3 dR2g/V2 d distance below pylon ft R 52 ft line length V lane speed feet per second example 165 mph 242 feet per second distance d 149 ft pilot-induced drag AT LAST! ES AND BEAR NGS WDAMACE MAKE NEINE OvERIIAUL PIECE OE CAKE FXPANOINC RING SlIDE TAPPER SLEEVE PULLER 1514 Id SI/L ENGINE795 BEARING PULLER SR 7IM REARING695 Special Order Both For1395 send check MD Include SOC UPOI GATOR R/C PRODUCTS flsPoNc 0 PENSOC 11* rI 12504 billgers SNOW WHITE 20 Joe Rasyantes beactriul model SNOW WHITE won enery beauty contest entered late 1930s Featured charles Grants Model Design teolbook 314 size version perfect modern N/C flying Weoe many requests 15 35 Engines 3 Channel ft/C Speten. 68 WIngspan . 700 Sq Wing Area . 4 Lb. Foil Size PLAN N PATTERN SET RcFF7 $1495 Prices urn complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tobe Details new designs & great things come send 50 Iretundablef br information July 1982 153 657 NE tt8rn St Mains floiaa 33160 IeieDhcirie 935 1436 MODELIvIANIA ORoESESEND NSSCS RD BPEoaILVN leA V. 222 13399250 NO COLLECT CAILS HEiRESS E 13 & C 14 StS P1 STATEN ISLAIM TAKE VERRIZAI TO SELT FIlMY EAST ClMEY ISLEID AVE EIIT TO AVE RUST US TO N 3 StOCKS TO ST SEEN l& lED 12 TO 9TIES & TIOMS 12 TO 545 FRI 12 TO 7 & SAT 10 TO 6 00t HIGH POINT FSSE/SPIIOER BALANCES PROTECT YIGA ECOSICES USE TIE REST24951995 002DOG PSODIETS PERHA USIT 2 TYPES FLAT US RAGIUSIPIIE/C9MSS ORtT ON ROTH EITHER lME6954950 BUY SET PLAT RADIUSSET SE 2595 003IIORLO EI81ICES 521 SERVO SE PLUS24951295 AS AROVE WITH FUTARA PLUS29951595 004AIStREWS TRAICERHASTER67953995 005ASSOCIATED 12E S/C CAR 18 CELLBATI LESS BOGY & RADIO128007495 SAVE TIlE PHWE Y011S USGER 11112121 3399250 006 SUSI CLEAR 6 1/S SIZE OWES USILL330 255 00765/32395299 000 -83/16 470379 009 67/32 '520399 010"81/4"550429 011 OUSt O.EAR121/5-900599 012125/32-068639 013123/16 '910699 014 '127/331045029 025 '121/4 "1130099 ORE DIM tEll 101 SPECIAL LIST OVER 150 PiMEFACThS 01601MC TARIiA 4 IOESI TOYOTA SPECIAL WFERI ItlmES MTTESIES AND CHARGER25999 5 2 RE t AND SAVE 1000 EACH24999 2 tIAS/USGES PUS SHIPPING PIWOWES 017 ElI AIR CLEARER PRE MOST S LARGER CS FIfE PUS AISCSWT225179 REPLENT FILTERS 2/PACK195129 010 ZIt US TOFFLITE 10 PRWS 159 109 PUS PASTES SERVICE PIE YOW USOER IN 2123399250 HASTERCARD AND VISA TED SEMI ALL ORGERS AND INGIJIRES TO ISPEODICLYN S MODGEL SISSTEPESE 1O GRJSLSEGENO MSECI RD BROOICLYFI N 1122YP ALL PRICES SUOECT TO OWNIE IWPEA GOOD TIL 30TH SE PUS lTH 180.ESS CIIT SIPPLIES AlE EIIWISTEG FREE 101 SPECIALSLIST 111TH USS US SEND SASS USING OFFORHATIUS OY NO COG ALL PRICES INCLUGE 55 CASH GISCOLSIT 11111 RET ORGER 515CREDIT CARD USERS PLEASE ADD 57 TO TOTAL IIUDE CARGO EXPIRATIUS DATE INTER RSAOC 0 6 SIUSATl SHIPPING & HASOLINO 1500 5000 ADD 4SO OVER 5000 ADO 97 MAO IS 1050 & 25 LBS 0 OVERSIZE 000 ASS $400JT SE CUST US AGO 155 OP TOTAL PUS SHIPPING ALL MONIES 181ST GE IN US C1IEY SALES ARE FINAL ALLOW TIRE PUS PERSONAL CHECKS TO CLEAR NY RESIGENTS P81ST ADO ARPLICADLE SALES TAOSEND SASE PUS ALL INWJIRES SPECIFY SIZE COLUS AND TYPE WHERE REQUIRED PO Son 1189 Passaic NJ 07055 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/G its standard reference book L6 Will Ever Need Available through local hobby shop use coupon p-I end copy new RADIO CONTROL BUYERS GUIDE Please check Li Enclosed $950 $795 plus $155 postage US & canada dians send US funds VA residents add 4% sales las Li charge Li Mastercharge Li] visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton Virginia 22024 1 Kraft RIC Electronics Lii Low Repair Costs rcuM~i Kraft Customers MAXIMUM Service Charges 4-7 channel systems$3250 2 channel systems$2650 Parts Shipping Extra 1685 Beckwith Dr Hudson OH 44236 Servo reversing now available 7C & 7CS 1976-81 transmitters aileron elevator rudder throttle $3500 216 655-2278 altitude zero speed high flier would going 1575 mph possible practice flying exclusively FAI pylon style order make both steady flight low flight natural thing under weather conditions Thanks Charlie Thats month guys rest article will appear next Speed column Meanwhile suggest start looking flying FAI Speed very challenging Gene HempeL 301 N Yale Dr Garlan4 TX 75042 CL Navy Carrier/Perry Continued page 60 engine has large-bore carburetor should readily adaptable Carrier operation using pump exhaust pressure bore 105mm narrow 22mm spraybar effective choke area substantial 64 sq mm in-flight adjustable needle valve feature can readily bypassed conventional three-line operation crankcase 170 43mm wide bolt spacing205 52mm 985 25mm Richard L Perry 46 Woodhill Dr Golds boro NC 27530 Extra Hands/Jennings Continued paae 61 electrical solderless ring tongue Loop control line through around again through crimping eye lug crimp lug other end control line make normal soldered leadout-constructed loop about inch diameter Make tether aircraft tether should attached solid struc ture rear aircraft use cap screw blind nut sure glue threads prevent vibration backing screw out will need purchase long-shank screw driver shank must 3/16-in diameter less Normally blade must ground down will go through release look Safe- Loc closely will see well-designed features positive opening action safety lock mechanism Upon first look difficult see operates safety mode starting engine adjusting needle valve mode air craft can rest ground held vertical position will allow fine-tuning needle valve ready mode used after engine running correctly aircraft resting ground Check see tether loop right position Release safety catch pick up control handle Pick up release handle Tug lightly triggers launch aircraft immediately starts moving forward own After finished flying release can packed up quickly easily fits compactly field box release allows go flying yourself safety mechanism positive opening action assures operating want SAFE FLYING IS NO ACCIDENT 154 Model Aviation
Edition: Model Aviation - 1982/07
Page Numbers: 58, 59, 153, 154
Control Line SPEED Gene Hempel THIS COLUMN next will devoted article written Charlie Lieber Morres town NJ member American FAI Speed team FAI team trials held Seguin during Nats asked Charlie would willing share some valuable FAI information construction techniques Recently Charlie bestowed upon fantas tic article sharing readers columb Introduction FAI Speed event history rational rules having enough leeway challenge fliers bent towards experi mentation reward FAI flying travel foreign lands truly international competi tion history FAI speed attainment over past several years shown illus trations have noted some advances state art used achieve speeds best American times also noted indicating clear superiority Europeans during period increases speed due small changes giving cleaner airplanes reliable repeatable operation course horsepower what follows will try outline some problems solutions have tried experience what has worked what hasnt way may possible stimulate independent thinking along new avenues ap proach preventing some excursions down blind alleys flight system basic system airplane pilot lines engine propeller can tied together shown below clearly written explanation details may found Reference 1 1 TDLDPDA 2 PxETxV V d ft per sec T thrust lbs DL drag lbs Dp t drag lbs DA airplane drag lbs P ne output power ft-lbs per sec E efficiency 550 foot-pounds per second equals horsepower hp terms horsepower various contributors pilot action Chuck Schuette Woodvale England 1 97g inc i-Al pyion use Ins siae nandle rest notch-shaped recesses pylon portable pylon used atthe 1978 World Champs 58 Model Aviation Speed team thatwill representthe USA 1 92 World Championships Sweden Lettto right Chuck Schuette Charlie Lieber Carl Dodge Photo taken 1981 Team Trials Texas engine power absorption have plotted Fig 2 essetitially plot Equation 1 Flying lines Fig 2 obvious line drag DL largest consumer engine hp has recognized least far back 19502 Examination aerodynamics wires shows grouping together shown Fig 3 results about half line drag Examination Fig 2 will indicate large resultant speed gains fixed hp prop efficiency result theoretical speeds attained competition mutual consent fliers because excessive speed potential general difficulty construction groupers ruled out Today lines must physically separated both wing exit handle Noting drag ofthe lines dependent length lines exposed airflow experimenters have turned long asymmetric wing model theory indicates significant increases speed can attained trading wing drag line drag Tests Carl Dodge did confirm paper analysis tried series experiments line covers shown figure 4 extended wing regular plane up five feet After solving some flutter problems able measure change performance dead end possible relatively high aspect ratio wings somewhat high thickness-to-chord ratio produce drag indicated theory would think dead end based American result Hungarian fliers have produced speeds excess 165 mph using 6-ft wings Would Hungarians go fast short wings didnt theory hold up Dodge Lieber experiments Consid ering potential advantages must still looked prime area serious investigation pilot Fig 2 pilot drag curve results model being flown near FAI upper altitude limit Consider model being flown constant altitude shown Fig 5 forces acting model must balance model Continued page 153 July 198259 FROM PICA LIP 1059 oz tive minute epoxy difference sandable epoxy available Compatible resin coating has new flip-top cap Industrial Strength 100% uncut resin FOR ThE NEWCOMER Its super stable gentle faster building JIRPIEmore versatile Wing version R~Lxtended Wing Span 50 area 565 sq inches Fuselage 44V2 inches Extended Wing VersionWeight 4-4V2 pounds Wing Span 54 area 615 sq inches Engine 25-40 SPECIFICATIONS GLUIT HIP 601 12 oz heavy duty aliphatic white glue especially formulated modelers Its sandable fast drying truly heavy duty Its great hardwood plywood fiber materials subject high on1 torque pare airplane have take care million small details like getting off work seeing can get model airplane fuel over Europeyou cant just drag four gallons Dukes fuel board airline Stunter probably costs competitors upwards $100000 personal money little things like travel within United States helping out travel site have rent vans get living quarters flying sites missed team meals AMA pays travel New York Europe pays entry fees World Champs covers lodging food Championships site pays some fees transport airplane box also has some funds available practice time helps out travel within US help incidentals come out team members pocket Still its great honor make team writer tried six times before finally getting team 1980 worth minute spent Once team gets Champonship site great experience meeting modelers over World Italian team friendly bunch fliers have great food pit area fix delicious spaghetti back rooms 1980 Polish team treated Americans cocktail party featured some spirits rolled back eyelids such experienced consumers Les Bill Chinese team showed up 1980 event some good fliers will get better better Japanese team real fun group also has several good fliers Canadian team probably has fun team Championships led Fred Tellierwho also DUAL PERSONAUTY TRAINER GEENIS BEAUTIFUL SUPER CHAMP DEALERt DisrRiBurog INQuIRItS INVITED WS 54 20 35 tNGINES 3 CHANNEL THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolubonary snap on wing eliminates bolts rnbber bands Complete kit $5495 dealer direct GEMINI MODELS INC keeps improving year flying also some very good fliers Czecho slovakia United Kingdom Hungary France Rodrigues Brazil young eager learn must three zillion pictures posed snapped World Cham pionships best luck 1982 USA FAT Aerobatics Team defending champion Les McDonald Any four could come back World champion could strongest team effort ever assembled Sweden should good site Championships Put up some good ones men information Precision Aerobatics PA MPA contact WvnnPaui 1640 Wavwick Dr Lexington KY 40504 CL Speed/Hempel Continued vaqe 59 will either move up down out Note lift force wings must balance weight model must also balance part line tension acting model doing model generates drag due lift called induced drag speed penalized Conversely some constant flight altitude allows lift go zero because line tension balances model weight Using fig 5 has shown4 distance below pylon level pilot should fly airplane minimize drag 3 dR2g/V2 d distance below pylon ft R 52 ft line length V lane speed feet per second example 165 mph 242 feet per second distance d 149 ft pilot-induced drag AT LAST! ES AND BEAR NGS WDAMACE MAKE NEINE OvERIIAUL PIECE OE CAKE FXPANOINC RING SlIDE TAPPER SLEEVE PULLER 1514 Id SI/L ENGINE795 BEARING PULLER SR 7IM REARING695 Special Order Both For1395 send check MD Include SOC UPOI GATOR R/C PRODUCTS flsPoNc 0 PENSOC 11* rI 12504 billgers SNOW WHITE 20 Joe Rasyantes beactriul model SNOW WHITE won enery beauty contest entered late 1930s Featured charles Grants Model Design teolbook 314 size version perfect modern N/C flying Weoe many requests 15 35 Engines 3 Channel ft/C Speten. 68 WIngspan . 700 Sq Wing Area . 4 Lb. Foil Size PLAN N PATTERN SET RcFF7 $1495 Prices urn complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tobe Details new designs & great things come send 50 Iretundablef br information July 1982 153 657 NE tt8rn St Mains floiaa 33160 IeieDhcirie 935 1436 MODELIvIANIA ORoESESEND NSSCS RD BPEoaILVN leA V. 222 13399250 NO COLLECT CAILS HEiRESS E 13 & C 14 StS P1 STATEN ISLAIM TAKE VERRIZAI TO SELT FIlMY EAST ClMEY ISLEID AVE EIIT TO AVE RUST US TO N 3 StOCKS TO ST SEEN l& lED 12 TO 9TIES & TIOMS 12 TO 545 FRI 12 TO 7 & SAT 10 TO 6 00t HIGH POINT FSSE/SPIIOER BALANCES PROTECT YIGA ECOSICES USE TIE REST24951995 002DOG PSODIETS PERHA USIT 2 TYPES FLAT US RAGIUSIPIIE/C9MSS ORtT ON ROTH EITHER lME6954950 BUY SET PLAT RADIUSSET SE 2595 003IIORLO EI81ICES 521 SERVO SE PLUS24951295 AS AROVE WITH FUTARA PLUS29951595 004AIStREWS TRAICERHASTER67953995 005ASSOCIATED 12E S/C CAR 18 CELLBATI LESS BOGY & RADIO128007495 SAVE TIlE PHWE Y011S USGER 11112121 3399250 006 SUSI CLEAR 6 1/S SIZE OWES USILL330 255 00765/32395299 000 -83/16 470379 009 67/32 '520399 010"81/4"550429 011 OUSt O.EAR121/5-900599 012125/32-068639 013123/16 '910699 014 '127/331045029 025 '121/4 "1130099 ORE DIM tEll 101 SPECIAL LIST OVER 150 PiMEFACThS 01601MC TARIiA 4 IOESI TOYOTA SPECIAL WFERI ItlmES MTTESIES AND CHARGER25999 5 2 RE t AND SAVE 1000 EACH24999 2 tIAS/USGES PUS SHIPPING PIWOWES 017 ElI AIR CLEARER PRE MOST S LARGER CS FIfE PUS AISCSWT225179 REPLENT FILTERS 2/PACK195129 010 ZIt US TOFFLITE 10 PRWS 159 109 PUS PASTES SERVICE PIE YOW USOER IN 2123399250 HASTERCARD AND VISA TED SEMI ALL ORGERS AND INGIJIRES TO ISPEODICLYN S MODGEL SISSTEPESE 1O GRJSLSEGENO MSECI RD BROOICLYFI N 1122YP ALL PRICES SUOECT TO OWNIE IWPEA GOOD TIL 30TH SE PUS lTH 180.ESS CIIT SIPPLIES AlE EIIWISTEG FREE 101 SPECIALSLIST 111TH USS US SEND SASS USING OFFORHATIUS OY NO COG ALL PRICES INCLUGE 55 CASH GISCOLSIT 11111 RET ORGER 515CREDIT CARD USERS PLEASE ADD 57 TO TOTAL IIUDE CARGO EXPIRATIUS DATE INTER RSAOC 0 6 SIUSATl SHIPPING & HASOLINO 1500 5000 ADD 4SO OVER 5000 ADO 97 MAO IS 1050 & 25 LBS 0 OVERSIZE 000 ASS $400JT SE CUST US AGO 155 OP TOTAL PUS SHIPPING ALL MONIES 181ST GE IN US C1IEY SALES ARE FINAL ALLOW TIRE PUS PERSONAL CHECKS TO CLEAR NY RESIGENTS P81ST ADO ARPLICADLE SALES TAOSEND SASE PUS ALL INWJIRES SPECIFY SIZE COLUS AND TYPE WHERE REQUIRED PO Son 1189 Passaic NJ 07055 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/G its standard reference book L6 Will Ever Need Available through local hobby shop use coupon p-I end copy new RADIO CONTROL BUYERS GUIDE Please check Li Enclosed $950 $795 plus $155 postage US & canada dians send US funds VA residents add 4% sales las Li charge Li Mastercharge Li] visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton Virginia 22024 1 Kraft RIC Electronics Lii Low Repair Costs rcuM~i Kraft Customers MAXIMUM Service Charges 4-7 channel systems$3250 2 channel systems$2650 Parts Shipping Extra 1685 Beckwith Dr Hudson OH 44236 Servo reversing now available 7C & 7CS 1976-81 transmitters aileron elevator rudder throttle $3500 216 655-2278 altitude zero speed high flier would going 1575 mph possible practice flying exclusively FAI pylon style order make both steady flight low flight natural thing under weather conditions Thanks Charlie Thats month guys rest article will appear next Speed column Meanwhile suggest start looking flying FAI Speed very challenging Gene HempeL 301 N Yale Dr Garlan4 TX 75042 CL Navy Carrier/Perry Continued page 60 engine has large-bore carburetor should readily adaptable Carrier operation using pump exhaust pressure bore 105mm narrow 22mm spraybar effective choke area substantial 64 sq mm in-flight adjustable needle valve feature can readily bypassed conventional three-line operation crankcase 170 43mm wide bolt spacing205 52mm 985 25mm Richard L Perry 46 Woodhill Dr Golds boro NC 27530 Extra Hands/Jennings Continued paae 61 electrical solderless ring tongue Loop control line through around again through crimping eye lug crimp lug other end control line make normal soldered leadout-constructed loop about inch diameter Make tether aircraft tether should attached solid struc ture rear aircraft use cap screw blind nut sure glue threads prevent vibration backing screw out will need purchase long-shank screw driver shank must 3/16-in diameter less Normally blade must ground down will go through release look Safe- Loc closely will see well-designed features positive opening action safety lock mechanism Upon first look difficult see operates safety mode starting engine adjusting needle valve mode air craft can rest ground held vertical position will allow fine-tuning needle valve ready mode used after engine running correctly aircraft resting ground Check see tether loop right position Release safety catch pick up control handle Pick up release handle Tug lightly triggers launch aircraft immediately starts moving forward own After finished flying release can packed up quickly easily fits compactly field box release allows go flying yourself safety mechanism positive opening action assures operating want SAFE FLYING IS NO ACCIDENT 154 Model Aviation