Radio Control SOARING Dan Pruss 047 fl EARPHONE JACK PLUG TO RECEIVER 10K 10 2M2FLYITL____ CALIBRATE LM3900N CHIP PINFUNCTION 7GROUND 14 VDCVM IV FULL SCALE 9V TRANSISTOR BATTERY 15-6UNUSED 8-913AMPS schematic visual readout accessory Thermic Sniffler Dan has say about column its easy make useful competition tool BACK February column hot new item featured called AL-ISPAR all-aluminum spar very high strength factor its weight gent designed Gary Hut chison Charlotte MI Well has done again time its linkage package clever Rubiks CubeGarys has series practical applications Also theres no puzzle Garys invention Labeled 90-Degree Motion Transfer Module unit consists four parts made Nylon can snapped apart Gary Hutchisons AL-TEC Products Inc new 9Q0 Motion Transfer Module ideal aileron spoiler flap actuator comes both white black plastic Picture L shows unit assembled other photo R shows 4 component parts snap together assembly rectangular piece dog-leg slot allows differential aileron deflection back together again seconds As name implies transfers motion 900 direction unlike 900 bellcrank can perform similar function compromise some non-linear ac tion due sweep arms 900 MTMs action linear very positive lends itself ideally spoiler flaps aileron applications unit light weight photo shows typical stallation Gary recommends gluing onein piece plastic tubing front units case Cut two pieces act spacers between two ribs cut length wire spans -in longer rib bay Slide wire through rib tubing sections other rib Glue spacers wire ends ribs have neat quick installation pushrod action MTM parts thick enough drill tap giving neatand adjustableconnection However just drilling hole through face drive plate also recommended will ac commodate simple 900-bend-ina-wire installation Another feature MTM way output arm allows fine adjustments First arm has T cross section 50 Heres MTM could set up actuate flaps L ailerons Center spoIlers R Units mounted structure means inter-rib wire running through tube glued front unit Output unit surface via push-strip note slot strip adjust surfaces neutral position Input servo via pushrod case flap aileron units its threaded rod screwed tapped hole input flange spoiler unit its regular clevis attached hole drilled through input flange access covers flap aileron units demonstration purposes mock-up theyre Installed spoiler units output arm has modified allow use standard nylon hinge spoiler actuation mock-up wing has 3 unIts mounted 46 Model Aviation DI stays alignment arm boss push stripas compared rodcan screwed place push strip can also adjusted push strip marketed made Delrin mesures 040 X / x 6 Meanwhile Gary has sandwiched 020 x -in strip styrene plastic tween two strips /M X /2-in plywood Between plywood butted against styrene half regular nylon control surface hinge other hinge-half acts horn control surface After push strip assembled two hinge halves reconnected hinges original wire result neatest installations assemblies ever seen Spoiler actuation takes little variation theme output arm does lend itself modifications could actuate over-and-under set spoilers speed brakes matter units light enough two could attached back-to-back operate controls indi vidually clever unit Gary has few works adapter MTM can mounted directly onto output wheel servo could provide coupled aileron rudder servo linear action well meantime MTM will dis tributed through Ace RC Inc price $595 unit comes either black white comes assembled input/output ratio However included another output arm gives 11 action direction 21 opposite well-suited differential aileron action Kurt Rosner Rocky Moun tain Soaring Association comes schematic visual readout popular Thermic Sniffler Although standard version its audio monitor allows fly alone taking advantage Sniffler Kurts version eliminates audioor gives option both Kurt included some hints comments tells circuit quick-n-dirty cookbook design works uses two sections National Semiconductor LM3900 quad Norton ampli fier chip 14-pin plastic dual-in-line package cookbook National linear applications note AN-72 no critical values goes say first stage high-gain amplifier driven saturationsquare wave outputat levels exceeding about one-quarter volt peak-topeak output Snifflers monitor receiver earphone jack isolates ter reading changes audio amplitude second stage tachometer circuit converts audio DC voltage drives panel-mount DC voltmeter used VU meterwithout rectifierbecause responds changes very quickly Assuming use nine-volt battery power circuit choose meter five less volts full scale deflection won able position zero sink center scale calibration potentiometer multi-turn screwdriver-adjustable Kurt comments dont want knob sticking out box can change calibration accidentally during flight further points out area interest right around zero sink about 500 Hz Sniffler Adjust calibrate pot center meter needle zero sinkContinued page 137 GET CIHIARCE OUT OP ACE ACE R/C IS HEADQUARTERS FOR ALL YOUR TRANSMITTER AND RECEIVER BATTERY NEEDSII Including individual cells assembled packs complete line chargers cyclers Check ACE RIC first CVC tant Voltage Charger CVC Continuous Voltage Charger 110 volt charger 12 volt starting batteries CVC delivers constant 400 ma HI charge rate 90% charge cycle tapers 15 ma trickle charge rate 34K30-Ace CVC Kit$2495 34K30C-Ace CVC Assembled$2995 Tachmaster Ace Tachmaster opti cally coupled analog tachometer easy use easy read Featuring dual range 0-5000 RPM 0-25000 RPM Making Tachmaster extremely versatile accurate 26K25-Tachmaster Kit$2995 26K25C-Tach master Assembled$3995 FFC Charge System dependable fast/slow rate charger will safely rapidly charge both receIver transmit batteries 12V DC source cut back automatically overnight charge rate 4SV receiver 96V transmitter packs 34K40-FFC Kit$2995 34K40C-FFC Assembled $3995 Digipace Ace Digipace designed j~ cycling ni-cd batteries Auto matic discharging both receiver transmitter batteries simul taneously independently Switch three different transmitter charge rates Itages Switch two different receiver 34G15 Digipace Assembled$9495 34G16-Diglpace Kit$7995 Battery Packs NI CD Battery Packs needs 100 mah 1200 mah ACE I/IncJ Send $200 100 page catalog must order direct add $100 handling fee BOX ShE HIGGINSVILLE MO 64037 816584-7121 August 1983 47 AL-TEC going release ATlOl AT1O2 MTMseen mounted servo unlta will adapt rotary-output servo will pro vide same action seen Other photos However shown single servo will able provide linear action coupled ailerons rudder IEGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue ______________________service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control Futaba K~KN~q7 N 180 E Burgess RoadPensacola FL 32503 Authorized sales & ser vice JR-PROPO radio Line equipment imported ____ Circus Hobbiesw 904/478-6745 Whatever decision made ClAM level Electroflight competition stay Americans have chance better take hard look current designs view increas ing performance RC Scale/Wischers Continued paoe 43 Cu 90-in bore I-in stroke also reed valve can geared Lou also displayed few remaining two- four- six-cylinder engines made up parts original 60 20 80 produc tion run early 1970s Bob Do//v Wiseher S-22 Lapham Peak Rd Be/afield WI 53018 RC Soaring/Pruss Continued page 47 check calibration before flight Launches well-cored boomers will peg needle Normal climb rates will upper regions meter Plug ear piece meter box stick shirt pocket case want listen well read also put normal load receiver output stage Loss signal Sniffler transmitter results false high meter readingsanother good reason keep ear piece plugged nearby Kurts version might great advantage solo flier visual readout could boon cross-country team member monitoring Sniffler speaking cross-country flying four notices have passed way men tioning races summer some will over time comes way SOARs scheduled June Michigan International Soaring Society will host its race July will Thousand Oaks Soaring Society California Also scheduled Florida Soaring So ciety Well keep posted mean time Good Lift Dan Pruss 131 E Penn/n gton Ln P/a/nfield IL 60544 reed about Model Aviation writing advertisers mention COt WACO HKS-7- LAKES JKAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN$27 OOpp PLAN$27OOpp FG Cowl527oOpp FG Cowl$27OOpp FG Pants$25tOpp ECONO PAC$49OOpp ECONO-PAC$70DOpp SAVE$600 SAVE 0 Farman Moustiqueplan$17Otpp RC Giant Scale/Beckman Continued page 49 intended original 2ci Quadra new 3ci Q-50 Quadra might marginal Shoestring all-time favorite airplanes Years ago built Goldberg kits best sport fliers have ever version scaled 49 foot makes little one-third size real designed specifically Ka wasaki 315 ci engine anything 25 40 would Im thinking build ing 22 Kawasaki watch weight should have Giant Scale version 40-powered sport flier liked well Bobs Shoestring spans 945 1492 sq wing area Weight listed 28 lb As usual plans full information about things get materials need plans available Mammoth Scale Plans 3351 Pruneridge Ave Santa Clara CA 95051 AlH T-28B $36 Shoestring $2450 prices include Dostage Continued page 140 August 1983 137 CONDOR PACKS POWERHOUSE world famous j engines heli kits & f ech accessories jphone Write V or drop complete listings & dollar saving prices 17835 Sky Park Cr Suite E 0 0 0Irvine CA 92714 714/556-1888 B AlTENTION OPS Engines & Parts Available Racing Marine Use OPS 15 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete information send $1 P & G Metal Products 301 North Yale Drive Garland TX 75042 Gene Hempel12141 2725210 after 600 PM
Edition: Model Aviation - 1983/08
Page Numbers: 46, 47, 137
Radio Control SOARING Dan Pruss 047 fl EARPHONE JACK PLUG TO RECEIVER 10K 10 2M2FLYITL____ CALIBRATE LM3900N CHIP PINFUNCTION 7GROUND 14 VDCVM IV FULL SCALE 9V TRANSISTOR BATTERY 15-6UNUSED 8-913AMPS schematic visual readout accessory Thermic Sniffler Dan has say about column its easy make useful competition tool BACK February column hot new item featured called AL-ISPAR all-aluminum spar very high strength factor its weight gent designed Gary Hut chison Charlotte MI Well has done again time its linkage package clever Rubiks CubeGarys has series practical applications Also theres no puzzle Garys invention Labeled 90-Degree Motion Transfer Module unit consists four parts made Nylon can snapped apart Gary Hutchisons AL-TEC Products Inc new 9Q0 Motion Transfer Module ideal aileron spoiler flap actuator comes both white black plastic Picture L shows unit assembled other photo R shows 4 component parts snap together assembly rectangular piece dog-leg slot allows differential aileron deflection back together again seconds As name implies transfers motion 900 direction unlike 900 bellcrank can perform similar function compromise some non-linear ac tion due sweep arms 900 MTMs action linear very positive lends itself ideally spoiler flaps aileron applications unit light weight photo shows typical stallation Gary recommends gluing onein piece plastic tubing front units case Cut two pieces act spacers between two ribs cut length wire spans -in longer rib bay Slide wire through rib tubing sections other rib Glue spacers wire ends ribs have neat quick installation pushrod action MTM parts thick enough drill tap giving neatand adjustableconnection However just drilling hole through face drive plate also recommended will ac commodate simple 900-bend-ina-wire installation Another feature MTM way output arm allows fine adjustments First arm has T cross section 50 Heres MTM could set up actuate flaps L ailerons Center spoIlers R Units mounted structure means inter-rib wire running through tube glued front unit Output unit surface via push-strip note slot strip adjust surfaces neutral position Input servo via pushrod case flap aileron units its threaded rod screwed tapped hole input flange spoiler unit its regular clevis attached hole drilled through input flange access covers flap aileron units demonstration purposes mock-up theyre Installed spoiler units output arm has modified allow use standard nylon hinge spoiler actuation mock-up wing has 3 unIts mounted 46 Model Aviation DI stays alignment arm boss push stripas compared rodcan screwed place push strip can also adjusted push strip marketed made Delrin mesures 040 X / x 6 Meanwhile Gary has sandwiched 020 x -in strip styrene plastic tween two strips /M X /2-in plywood Between plywood butted against styrene half regular nylon control surface hinge other hinge-half acts horn control surface After push strip assembled two hinge halves reconnected hinges original wire result neatest installations assemblies ever seen Spoiler actuation takes little variation theme output arm does lend itself modifications could actuate over-and-under set spoilers speed brakes matter units light enough two could attached back-to-back operate controls indi vidually clever unit Gary has few works adapter MTM can mounted directly onto output wheel servo could provide coupled aileron rudder servo linear action well meantime MTM will dis tributed through Ace RC Inc price $595 unit comes either black white comes assembled input/output ratio However included another output arm gives 11 action direction 21 opposite well-suited differential aileron action Kurt Rosner Rocky Moun tain Soaring Association comes schematic visual readout popular Thermic Sniffler Although standard version its audio monitor allows fly alone taking advantage Sniffler Kurts version eliminates audioor gives option both Kurt included some hints comments tells circuit quick-n-dirty cookbook design works uses two sections National Semiconductor LM3900 quad Norton ampli fier chip 14-pin plastic dual-in-line package cookbook National linear applications note AN-72 no critical values goes say first stage high-gain amplifier driven saturationsquare wave outputat levels exceeding about one-quarter volt peak-topeak output Snifflers monitor receiver earphone jack isolates ter reading changes audio amplitude second stage tachometer circuit converts audio DC voltage drives panel-mount DC voltmeter used VU meterwithout rectifierbecause responds changes very quickly Assuming use nine-volt battery power circuit choose meter five less volts full scale deflection won able position zero sink center scale calibration potentiometer multi-turn screwdriver-adjustable Kurt comments dont want knob sticking out box can change calibration accidentally during flight further points out area interest right around zero sink about 500 Hz Sniffler Adjust calibrate pot center meter needle zero sinkContinued page 137 GET CIHIARCE OUT OP ACE ACE R/C IS HEADQUARTERS FOR ALL YOUR TRANSMITTER AND RECEIVER BATTERY NEEDSII Including individual cells assembled packs complete line chargers cyclers Check ACE RIC first CVC tant Voltage Charger CVC Continuous Voltage Charger 110 volt charger 12 volt starting batteries CVC delivers constant 400 ma HI charge rate 90% charge cycle tapers 15 ma trickle charge rate 34K30-Ace CVC Kit$2495 34K30C-Ace CVC Assembled$2995 Tachmaster Ace Tachmaster opti cally coupled analog tachometer easy use easy read Featuring dual range 0-5000 RPM 0-25000 RPM Making Tachmaster extremely versatile accurate 26K25-Tachmaster Kit$2995 26K25C-Tach master Assembled$3995 FFC Charge System dependable fast/slow rate charger will safely rapidly charge both receIver transmit batteries 12V DC source cut back automatically overnight charge rate 4SV receiver 96V transmitter packs 34K40-FFC Kit$2995 34K40C-FFC Assembled $3995 Digipace Ace Digipace designed j~ cycling ni-cd batteries Auto matic discharging both receiver transmitter batteries simul taneously independently Switch three different transmitter charge rates Itages Switch two different receiver 34G15 Digipace Assembled$9495 34G16-Diglpace Kit$7995 Battery Packs NI CD Battery Packs needs 100 mah 1200 mah ACE I/IncJ Send $200 100 page catalog must order direct add $100 handling fee BOX ShE HIGGINSVILLE MO 64037 816584-7121 August 1983 47 AL-TEC going release ATlOl AT1O2 MTMseen mounted servo unlta will adapt rotary-output servo will pro vide same action seen Other photos However shown single servo will able provide linear action coupled ailerons rudder IEGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue ______________________service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control Futaba K~KN~q7 N 180 E Burgess RoadPensacola FL 32503 Authorized sales & ser vice JR-PROPO radio Line equipment imported ____ Circus Hobbiesw 904/478-6745 Whatever decision made ClAM level Electroflight competition stay Americans have chance better take hard look current designs view increas ing performance RC Scale/Wischers Continued paoe 43 Cu 90-in bore I-in stroke also reed valve can geared Lou also displayed few remaining two- four- six-cylinder engines made up parts original 60 20 80 produc tion run early 1970s Bob Do//v Wiseher S-22 Lapham Peak Rd Be/afield WI 53018 RC Soaring/Pruss Continued page 47 check calibration before flight Launches well-cored boomers will peg needle Normal climb rates will upper regions meter Plug ear piece meter box stick shirt pocket case want listen well read also put normal load receiver output stage Loss signal Sniffler transmitter results false high meter readingsanother good reason keep ear piece plugged nearby Kurts version might great advantage solo flier visual readout could boon cross-country team member monitoring Sniffler speaking cross-country flying four notices have passed way men tioning races summer some will over time comes way SOARs scheduled June Michigan International Soaring Society will host its race July will Thousand Oaks Soaring Society California Also scheduled Florida Soaring So ciety Well keep posted mean time Good Lift Dan Pruss 131 E Penn/n gton Ln P/a/nfield IL 60544 reed about Model Aviation writing advertisers mention COt WACO HKS-7- LAKES JKAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN$27 OOpp PLAN$27OOpp FG Cowl527oOpp FG Cowl$27OOpp FG Pants$25tOpp ECONO PAC$49OOpp ECONO-PAC$70DOpp SAVE$600 SAVE 0 Farman Moustiqueplan$17Otpp RC Giant Scale/Beckman Continued page 49 intended original 2ci Quadra new 3ci Q-50 Quadra might marginal Shoestring all-time favorite airplanes Years ago built Goldberg kits best sport fliers have ever version scaled 49 foot makes little one-third size real designed specifically Ka wasaki 315 ci engine anything 25 40 would Im thinking build ing 22 Kawasaki watch weight should have Giant Scale version 40-powered sport flier liked well Bobs Shoestring spans 945 1492 sq wing area Weight listed 28 lb As usual plans full information about things get materials need plans available Mammoth Scale Plans 3351 Pruneridge Ave Santa Clara CA 95051 AlH T-28B $36 Shoestring $2450 prices include Dostage Continued page 140 August 1983 137 CONDOR PACKS POWERHOUSE world famous j engines heli kits & f ech accessories jphone Write V or drop complete listings & dollar saving prices 17835 Sky Park Cr Suite E 0 0 0Irvine CA 92714 714/556-1888 B AlTENTION OPS Engines & Parts Available Racing Marine Use OPS 15 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete information send $1 P & G Metal Products 301 North Yale Drive Garland TX 75042 Gene Hempel12141 2725210 after 600 PM
Edition: Model Aviation - 1983/08
Page Numbers: 46, 47, 137
Radio Control SOARING Dan Pruss 047 fl EARPHONE JACK PLUG TO RECEIVER 10K 10 2M2FLYITL____ CALIBRATE LM3900N CHIP PINFUNCTION 7GROUND 14 VDCVM IV FULL SCALE 9V TRANSISTOR BATTERY 15-6UNUSED 8-913AMPS schematic visual readout accessory Thermic Sniffler Dan has say about column its easy make useful competition tool BACK February column hot new item featured called AL-ISPAR all-aluminum spar very high strength factor its weight gent designed Gary Hut chison Charlotte MI Well has done again time its linkage package clever Rubiks CubeGarys has series practical applications Also theres no puzzle Garys invention Labeled 90-Degree Motion Transfer Module unit consists four parts made Nylon can snapped apart Gary Hutchisons AL-TEC Products Inc new 9Q0 Motion Transfer Module ideal aileron spoiler flap actuator comes both white black plastic Picture L shows unit assembled other photo R shows 4 component parts snap together assembly rectangular piece dog-leg slot allows differential aileron deflection back together again seconds As name implies transfers motion 900 direction unlike 900 bellcrank can perform similar function compromise some non-linear ac tion due sweep arms 900 MTMs action linear very positive lends itself ideally spoiler flaps aileron applications unit light weight photo shows typical stallation Gary recommends gluing onein piece plastic tubing front units case Cut two pieces act spacers between two ribs cut length wire spans -in longer rib bay Slide wire through rib tubing sections other rib Glue spacers wire ends ribs have neat quick installation pushrod action MTM parts thick enough drill tap giving neatand adjustableconnection However just drilling hole through face drive plate also recommended will ac commodate simple 900-bend-ina-wire installation Another feature MTM way output arm allows fine adjustments First arm has T cross section 50 Heres MTM could set up actuate flaps L ailerons Center spoIlers R Units mounted structure means inter-rib wire running through tube glued front unit Output unit surface via push-strip note slot strip adjust surfaces neutral position Input servo via pushrod case flap aileron units its threaded rod screwed tapped hole input flange spoiler unit its regular clevis attached hole drilled through input flange access covers flap aileron units demonstration purposes mock-up theyre Installed spoiler units output arm has modified allow use standard nylon hinge spoiler actuation mock-up wing has 3 unIts mounted 46 Model Aviation DI stays alignment arm boss push stripas compared rodcan screwed place push strip can also adjusted push strip marketed made Delrin mesures 040 X / x 6 Meanwhile Gary has sandwiched 020 x -in strip styrene plastic tween two strips /M X /2-in plywood Between plywood butted against styrene half regular nylon control surface hinge other hinge-half acts horn control surface After push strip assembled two hinge halves reconnected hinges original wire result neatest installations assemblies ever seen Spoiler actuation takes little variation theme output arm does lend itself modifications could actuate over-and-under set spoilers speed brakes matter units light enough two could attached back-to-back operate controls indi vidually clever unit Gary has few works adapter MTM can mounted directly onto output wheel servo could provide coupled aileron rudder servo linear action well meantime MTM will dis tributed through Ace RC Inc price $595 unit comes either black white comes assembled input/output ratio However included another output arm gives 11 action direction 21 opposite well-suited differential aileron action Kurt Rosner Rocky Moun tain Soaring Association comes schematic visual readout popular Thermic Sniffler Although standard version its audio monitor allows fly alone taking advantage Sniffler Kurts version eliminates audioor gives option both Kurt included some hints comments tells circuit quick-n-dirty cookbook design works uses two sections National Semiconductor LM3900 quad Norton ampli fier chip 14-pin plastic dual-in-line package cookbook National linear applications note AN-72 no critical values goes say first stage high-gain amplifier driven saturationsquare wave outputat levels exceeding about one-quarter volt peak-topeak output Snifflers monitor receiver earphone jack isolates ter reading changes audio amplitude second stage tachometer circuit converts audio DC voltage drives panel-mount DC voltmeter used VU meterwithout rectifierbecause responds changes very quickly Assuming use nine-volt battery power circuit choose meter five less volts full scale deflection won able position zero sink center scale calibration potentiometer multi-turn screwdriver-adjustable Kurt comments dont want knob sticking out box can change calibration accidentally during flight further points out area interest right around zero sink about 500 Hz Sniffler Adjust calibrate pot center meter needle zero sinkContinued page 137 GET CIHIARCE OUT OP ACE ACE R/C IS HEADQUARTERS FOR ALL YOUR TRANSMITTER AND RECEIVER BATTERY NEEDSII Including individual cells assembled packs complete line chargers cyclers Check ACE RIC first CVC tant Voltage Charger CVC Continuous Voltage Charger 110 volt charger 12 volt starting batteries CVC delivers constant 400 ma HI charge rate 90% charge cycle tapers 15 ma trickle charge rate 34K30-Ace CVC Kit$2495 34K30C-Ace CVC Assembled$2995 Tachmaster Ace Tachmaster opti cally coupled analog tachometer easy use easy read Featuring dual range 0-5000 RPM 0-25000 RPM Making Tachmaster extremely versatile accurate 26K25-Tachmaster Kit$2995 26K25C-Tach master Assembled$3995 FFC Charge System dependable fast/slow rate charger will safely rapidly charge both receIver transmit batteries 12V DC source cut back automatically overnight charge rate 4SV receiver 96V transmitter packs 34K40-FFC Kit$2995 34K40C-FFC Assembled $3995 Digipace Ace Digipace designed j~ cycling ni-cd batteries Auto matic discharging both receiver transmitter batteries simul taneously independently Switch three different transmitter charge rates Itages Switch two different receiver 34G15 Digipace Assembled$9495 34G16-Diglpace Kit$7995 Battery Packs NI CD Battery Packs needs 100 mah 1200 mah ACE I/IncJ Send $200 100 page catalog must order direct add $100 handling fee BOX ShE HIGGINSVILLE MO 64037 816584-7121 August 1983 47 AL-TEC going release ATlOl AT1O2 MTMseen mounted servo unlta will adapt rotary-output servo will pro vide same action seen Other photos However shown single servo will able provide linear action coupled ailerons rudder IEGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONTROl modeling radio repair So avoid inflated repair costs undue ______________________service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control Futaba K~KN~q7 N 180 E Burgess RoadPensacola FL 32503 Authorized sales & ser vice JR-PROPO radio Line equipment imported ____ Circus Hobbiesw 904/478-6745 Whatever decision made ClAM level Electroflight competition stay Americans have chance better take hard look current designs view increas ing performance RC Scale/Wischers Continued paoe 43 Cu 90-in bore I-in stroke also reed valve can geared Lou also displayed few remaining two- four- six-cylinder engines made up parts original 60 20 80 produc tion run early 1970s Bob Do//v Wiseher S-22 Lapham Peak Rd Be/afield WI 53018 RC Soaring/Pruss Continued page 47 check calibration before flight Launches well-cored boomers will peg needle Normal climb rates will upper regions meter Plug ear piece meter box stick shirt pocket case want listen well read also put normal load receiver output stage Loss signal Sniffler transmitter results false high meter readingsanother good reason keep ear piece plugged nearby Kurts version might great advantage solo flier visual readout could boon cross-country team member monitoring Sniffler speaking cross-country flying four notices have passed way men tioning races summer some will over time comes way SOARs scheduled June Michigan International Soaring Society will host its race July will Thousand Oaks Soaring Society California Also scheduled Florida Soaring So ciety Well keep posted mean time Good Lift Dan Pruss 131 E Penn/n gton Ln P/a/nfield IL 60544 reed about Model Aviation writing advertisers mention COt WACO HKS-7- LAKES JKAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN$27 OOpp PLAN$27OOpp FG Cowl527oOpp FG Cowl$27OOpp FG Pants$25tOpp ECONO PAC$49OOpp ECONO-PAC$70DOpp SAVE$600 SAVE 0 Farman Moustiqueplan$17Otpp RC Giant Scale/Beckman Continued page 49 intended original 2ci Quadra new 3ci Q-50 Quadra might marginal Shoestring all-time favorite airplanes Years ago built Goldberg kits best sport fliers have ever version scaled 49 foot makes little one-third size real designed specifically Ka wasaki 315 ci engine anything 25 40 would Im thinking build ing 22 Kawasaki watch weight should have Giant Scale version 40-powered sport flier liked well Bobs Shoestring spans 945 1492 sq wing area Weight listed 28 lb As usual plans full information about things get materials need plans available Mammoth Scale Plans 3351 Pruneridge Ave Santa Clara CA 95051 AlH T-28B $36 Shoestring $2450 prices include Dostage Continued page 140 August 1983 137 CONDOR PACKS POWERHOUSE world famous j engines heli kits & f ech accessories jphone Write V or drop complete listings & dollar saving prices 17835 Sky Park Cr Suite E 0 0 0Irvine CA 92714 714/556-1888 B AlTENTION OPS Engines & Parts Available Racing Marine Use OPS 15 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete information send $1 P & G Metal Products 301 North Yale Drive Garland TX 75042 Gene Hempel12141 2725210 after 600 PM