Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121
Edition: Model Aviation - 1979/12
Page Numbers: 20, 21, 22, 23, 110, 112
Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121
Edition: Model Aviation - 1979/12
Page Numbers: 20, 21, 22, 23, 110, 112
Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121
Edition: Model Aviation - 1979/12
Page Numbers: 20, 21, 22, 23, 110, 112
Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121
Edition: Model Aviation - 1979/12
Page Numbers: 20, 21, 22, 23, 110, 112
Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121
Edition: Model Aviation - 1979/12
Page Numbers: 20, 21, 22, 23, 110, 112
Dual rate aileron channel dual-rate roll button will add entirely new dimensions flying Usually available expensive equipment features brought easily within grasp addition five simple components set-up has tested numerous name-brand systems author extensively flown members club 0 David Herbert HowtoAdd Dual Rate Control toYour Transmitter HERE can add simple circuit following article describes two ways ters average beginning modeler usually transmitter obtain dual rate roll but- can used obtain desired dual-rate cannot afford some transmitters tonwith five simple components dual-roll features thatare often found transmit- rather expensive few us seasoned 20 Model Aviation Circuit No 1 trimpots Series 79 above Trimpot left adjusts roll rate Center trimpot B center trim Trimpot right C adjusts amount 14 rate desired Top R Inside Series 79 Circuit No 1 Roll button behind existing retract switch Two 14-rate circuits added aileron shown elevator same procedure 14 rate spin button can installed using elevator pot Right Fig 1 circuit No 1wire compo nent locations X-mittei case removed drawn scale SOLDER TERMINAL3RESISTANCE / / / RESISTANCE / SYMBOL WIPER- SYMBOLII @ BOURNS ADJUSTING TRIMPOT SCREW DER TERMINALS WIPER C&I SPOT SWITCH SHOWN IN 1/2 RATE POSITION TRIMPOT ADJUSTING SCREWS Fig 3 Bourns trimpot symbols Some equivalent trimpots may have solder terminal wiperof no concern circuit since pot terminal used drawing two wiper terminals shown electrically connected inside trimpot same .AILERON ROLL POT NOTE NUMBERS EXISTING WIRES TO ROLL POT DO NOT REMOVE TRIMPOTS B / AND C / C&K SPOT PUSHBUTTON ROLL SWITCH NORMALLY OPEN \A _______ EXISTING CIRCUIT BOARD MAY NEED lOBE MOVED ASIDE TO FACILITATE WIRING RIGHT GYMBAL K 5K B N OK C LEFT GYMBAL ROUTE WIRES UNDER BOARD BATTERY PACK 117 fliers final glide path What made decide design circuits newest airplane Astron designed Bill Evans published Model Aviation April 1979 Astron X-wmg flying wing elevon controls flies rings around just about other airplane Ive flown Its roll rate absolutely phenomenal 1979 MACS show probably saw demonstrate its outstanding handling characteristics elevon control mechanism sliding tray set-up problem Iran using set-up fact aileron control cannot mechanically reduced also reducing elevator portion control pushrods already inside holes servo output wheel Adjustments torque rods will reduce elevator travel benefits advantages circuit follows 1 These circuits installed radio frequency portion transmitter So need concerned possibility detuning system 2 By placing aileron rudder channel depending whether flying 3- 4channel airplane half rate will decrease servo movement half Teaching new mod eler fly sensitive airplane much simpler case Astron becomes much docile also helps flying pattern smoothness really counts 3 Maintaining precise constant roll rate during three consecutive rolls achieved roll button elevator control needed maintain level flight through man euver 4 By switching dual-rate switch half rate pressing roll button slow roll will performed full-rate mode full roll will performed roll button pressed amount roll rate also adjustable 5 Installation easy whole set-up can installed less hour no electronic experience needed must able perform good solder job make sure wires become loose cannot solder ask friend can help portion installation 6 The amount half rate desired adjustable Note have personally installed circuit MRC 6-channel radio three Cirrus 4-channel radios Cox Sanwa 4-channel radio 8channel Heath kit pluggable frequency modules Kraft KPT4A radio series 79 7-channel Kraft worked extremely well no problems encountered worked first time Circuit #1 works very well above December1979 21 -x TIOI mentioned radios except Kraft KPT4A case Kraft radio use Circuit #2 circuit basically identical Circuit #1 regard parts Circuit #2 uses 5K trimpots thereby elim inates 5K centering trimpot Note Circuit #2 will work above mentioned radios equally welL Before install circuit trans mitter must pointed out trim switch installed transmitter must trimmed center 1/8th inch either side center flying Most modelers trim planes fly close center trim anyway reason state trim switch set far left far right position dual rate switch moved full half rate trim servo will move about 1/64th inch trim switch close center centered no movement can detected dual rate switch operated condition has problem fliers have circuit installed transmitters flying throw dual-rate switch half full rate trim switch far left right trim will change alr slight change will probably notice obviously does bother people have install controls transmitters am swamped orders Installation circuits may may void radio manufacturers warranty Parts Required 25K Bourns trimpots Trimpot Products Divi sion Bourns Inc 12155 Magnolia Ave River side CA 92503 110K Bourns Trinipot 5 feet #26 AWG stranded wire 1SPDT Single Pole Double Throw minia ture toggle switch C&K #7 101SYZQ C & K Components Inc 15 Riverdale Ave Newton MA 02158 1SPDT miniature push-button switch C&K #8125Z 1Tube Zap Hot Stuff Coreflim doublesided tape tools install either circuits -in drill bit electric drill make holes forthe switches ajewelers screwdriver equiv alent adjust trimpots small adjustable wrench tighten nuts switches wire cutters small pair needle nose pliers soldering iron solder Installation 1 Remove back transmitter locate positions youd like place switches ease use Make sure installed will touch interfere other circuitry stick controls transmitter desirable position roll buttonif Mode II flieris above left stick can easily reached doesnt get pushed accident opera ting rudder throttle stick Bumping roll button least expect will get attention real fast dual-rate switch can mounted just about everywhere members club Skynauts Saddleback Valley install circuits transmitters prefer have dual-rate switch mounted top transmitter above aileron elevator stick 2 Using -in drill drill bit drill holes transmitter case using caution drill through existing circuitry controls Blow vacuum metal particles inside transmitter install switches shown Fig 1 2 Make sure easily accessible may solder terminals switches having remove 3 Locate three trimpots position transmitter adjusting screws ends can easily reached jewelers screwdriver Note Only 5K trimpot 10K trimpot installed using Circuit #2 Otherwise three trimpots fastened Circuit #1 may locate trimpots just about anywhere transmitter room available 4 Place drop Hot Stuff Zap Corefllm opposite side trimpot has tenninals Attach down terminals pointing straight up adjusting screws pointing same direction Fasten left right 5K trimpotA left 5K trimpot B center 10K trimpot C right Make sure place carefully removal difficult Note These trimpots have diagrams desig nating wiper terminal resistance terminal Ive indicated Fig 3 22 Model Aviation 5 Locate aileron roll-control stick pot transmitter pot bottom rigjit stick gimbal assembly As look rear side pot will see three terminals protruding ease wiring explanation Ive numbered terminals #1 #2 #3 look rear going clockwise direction Ive indicated Fig 1 2 6 wires already soldered pot cut removed using Circuit #1 Refer Figure #1 following circuit #1 wiring instructions 1 Cut two 6-in wires strip insulation ends side wire about -in Twist wires together braid Solder wires toggle switch terminals switch has three terminals does solder wire center terminal wire either two remaining terminals Note off position switch full rate position Route braided pair wires down bottom transmitter three trimpots have previously glued Cut wires may soldered wipers center terminals 5K tiimpot B 10K trimpot C Solder wires doesnt matter wire soldered trimpot 2Strip lation both ends three pieces 6-in long wire Wrap bare end wire around three ter minals aileron stick control pot Solder wires terminals making sure existing wires become unsoldered removed Gently pull wires after sold ering assure tight Take free end wire soldered #1 terminal stick pot solder resistance terminal closest adjusting screw 5K trimpot B 3 Cut 2-in length wire strip -in insulation off both ends Solder end wire terminal opposite resistance side adjusting screw 5K trimpot 4 Take free end 2-in wire have just soldered free end 6-in wire soldered #2 terminal aileron control stick pot twist together Solder twisted end resistance terminal opposite trimpot adjusting screw 10K trimpot C both wires soldered same terminal 5 Cut two 12-in lengths wire strip insulation both ends Twist wires braid solder end terminals pushbutton switch have installed Note switch has three terminals does solder wire center terminal terminal marked C closed 6 Take free end wires just soldered pushbutton switch solder wiper terminal 5K trimpot Note doesnt matter wire used pushbutton switch 7 Take free end remaining wire pushbutton switch free end wire connected #3 terminal aileron stick pot twist bare ends together solder twisted end resistance terminal opposite adjusting screw 5K trimpot B completes wiring portion Circuit #1 may proceed tuning section Tuning dual-rate roll-button Circuit #1 1 Turn transmitter receiver Make sure have full charge batteries Continued page 110 December 1979 23 TRIMPOT ADJUSTING SCREWS T I23 ISHAFTS 5K P0 ron stick thi 5K POT 4 IGYMBAL ofV tSPO corn mont Ii ION WIRE V TRIMPOT Al 5K /TRIMPOT C 10K ROUTE WIRES . UNDERI BOARD BATTERY PACK font ult Ni I2 3 III anals text ILL MORE FIRST PLACE WINNERS AT THE 1977 NATIONALS THAN THE OTHER MAJOR MANUFACTURERS COMBINED IN FACT OVER THE PAST 10 YEARS MORE NAT IONALS WINNERS HAVE USED REV-UP PROPS OTHER BRAND Rev-Up better 1 The efficient design con stant upgrading testing program 2 Better quality control better selection hard maple wood 3 The best finish completelyfuel proof New Improved 1978 SPECIAL PRO SERIES 2 FOR RCFREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3459 63489 733/4119 833% 45e 129 94555% 77A139 104567149 106W 8W149 10SEW159 114677/ 7%7%8159 11SEW169 11%67169 126179 12SW179 1356239 145 6279 1556349 164/,S449 17S6599 1856699 W WIDE BLADE EW EXTRA WIDE THAN ANY SERIES 400 B FOR SPEED S RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIAPITCHPRICE 53%4129 756149 7SN SN149 8%S%S%7 7/7%189 97 7% 7%189 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4% S%7 129 4% 55% 129 S788Y149 77A10%11169 8 89 189 89N 9%N 189 9 1213 229 N NARROW proper style size color decals press type found black lettering poor match styleWe will able furnish decals except wing numbers Fiberglass cowling wheel pants also available Bob Holman Plans have questions send addressed stamped envelope letter reasonable minimum questions Granger Williams Gee Bee Z 181 Pawnee St San Marcos CA 92069 Please patient expect instant answer drawings presented article traced control-line drawings made Vein Clements scale data supplied Premo Galletti long-time Gee Bee enthusiast model builder won control-line event Nationals several years ago Gee BeeRi Vein also built 1 scale gliders Gee Bees launched hills test theories stability excellent results Control-line drawings Gee Bee Z 2 scale Rl drawings 1W scale maybe obtained Vein writing him PO Box 608 Caldwell ID 83605 Include stamped envelope price list Much full-scale Gee Bee information used article taken book Gee Bee Stoy Charles Mandrake another Gee Bee enthusiast seriously interested learn ing facts check library used book stores copy book now out print Write Charles Mandrake PO Box 955 Ashtabule OH 44004 new book National Air Races 1932 Send stamped envelope prices Gee Bee information also obtained Bob Granville Henry Haffke Tom Nallen Rudy Profant Rate Roll/Herbert continued page 23 2 Assure aileron trim control front transmitter center position control stick remains centered during alignment 3 Operate dual-rate switch off observing aileron servo will slightly jump change trim small amount correct condition turn adjusting screw 5K trimpotB small increments thejewelers screwdriver until servo no longer moves jumps operate dual-rate switch repeatedly completes centering portion 4 With transmitter receiver still trim switch still centered hold aileron stick far left position Now operate dual-rate switch observe aileron servo full rate will have full normal travel since trimpots isolated circuit placing dual-rate switch half-rate position adjusting 10K trimpot C can adjust amount half-rate throw 5 Allow aileron stick center itself agasn Operate dual-rate switch observe servo changes trim retune did Step 3 tuning instructions 6 Place dual-rate switch full-rate position press roll button Observe servo will move full-left stick position Adjust 5K trimpotA press roll button servo moves same dis tance move control stick far left position completes roll adjustments Now can switch half rate pressing roll button result will half full servo movement slow roll fullrate position pressing roll button will result full roll Wiring instructions Circuit #2 1 All instructions Circuit #1 apply exception deletion 5K trimpot B 2 Install roll switch dual-rate switch fasten 5K trimpot 10K trimpot C Refer Fig 2 following wiring instructions 3 In circuit must unsolder center wire wires wire connected terminal both must spliced longer wire control-stick pot terminal #2 splice wire free end long enough reach center terminal spot dual rate switch Note Make sure wires soldered well splice well insulated using heatshrink tubing over splice good electricians tape 4 Solder wire left-hand side terminal dual-rate switch have previously installed long enough reach center ter minal #2 aileron control stick pot solder 5 Solder another wire right terminal dual-rate switch long enough reach 10K trimpot C resistance terminal closest adjusting screw Solder wire trimpot 6 Solder 3-in wire wiper terminal 10K trimpot C 7 Solder 1 2-in wire center terminal roll pushbutton switch 12-in wire left closed terminal same switch Twist both 12-in wires together make braid route down bottom transmitter over trimpots have glued 8 Strip A-in insulation ends three wires have just soldered wire left terminal dual-rate switch either wires roll pushbutton 3-in wire wiper terminal 10K trimpot C Twist bare ends together solder center terminal #2 aileron controlstick pot 9 Take remaining 12-in wire soldered closed C side terminal roll pushbutton solder resistance terminal opposite end adjusting screw 5K trimpot 10 Solder 3-in wire #3 terminal aileron control stick pot disturb wire presently attached 11 Solder free end 3-in wire wiper terminal 5K trimpot completes wiring Circuit #2 Tuning CircuIt #2 I Tune 5K trimpot correct amount roll explained tuning instructions Circuit #1 2 When repeatedly operating dual-rate switch half full may some slight servo movement jump correct must mechanically change position aileron control-stick pot its housing 3 Some transmitters have pots may rotate entire body center servos installed set-up Kraft KPT4A found aileron pot could rotated change trim radio set screw tightens against control pot shaft must loosened 4 With aileron stick neutral trim switch front transmitter centered operate dual-rate switch back forth observe servo servo moves switching dual-rate switch rotate shaft stick pot either clockwise counter-clock110 Model Aviation THE LEADER IN COMPETITION PROPELLERS wise until no servo movement can detected Note control-stick shaft should have rotated further 1/64 either way center 5 Once trim adjusted mechanically retighten set screw aileron control stick gimbal assembly Note overtighten 6 adjust amount half rate use same procedure described tuning instruc tions Circuit #1 adjusting 10K trimpot C completes tuning adjustments Circuit *2 Flyinp Flying using roll button really fun play beginners new ailerons love desensitized half-rate position use half-rate position Astron exclu sively works very welL circuit really works hope Ive presented well enough easily install have much fun enjoyment club members seven systems have installed circuits Ive got orders six writting very reliable weve seen no problems RC Aerobatics/Van Putte continued page 26 stopper fuel line should good shape use surgical rubber tubing make sure fuel has attacked extent has become gummy sticky enough fuel line becomes dissolved can plug needle valve Its better use silicone rubber tubing instead surgical rubber Make sure range check radio system often best ways detect deterioration detuning Separate capacity checks batteries should made periodically detect weak dying cells quiet shop test smooth operation servos slowly move transmitter stick Jerky operation servos indicates dirty servo transmitter potentiometers observe jerky servo operation particular channel try another servo channel problem ceases servo pot probably fault Conversely problem continues its prob ably due transmitter pot good article servo pot maintenance June 1979 issue MA Check connectors wires about come apart verify contacts bright shiny Pay particular attention aileron retract connectors since likely exposed dirt fuel residue other connectors look dull spray part tuner cleaner work back forth cleaning Check servo servo tray screws make sure still snug Vibration can loosen screws cause trim changes total control loss servo no longer tied down No matter good radio system installed airplane control linkage fails reason airplane likely crash Rough landings often fracture pushrods complete inspection should made after such occurences However probably weakest part control linkage threads clevis screwed Engine vibration aerodynamic turbulence constantly wear down threads clevis tends wobble pushrod either threaded coupler rod should replacedmaybe both Engine vibra tion aerodynamic turbulence also tend wear clevis pins holes control horns particularly true rudder clevis horn Such wear can detected easily locking pushrod attempting wiggie control surface play some thing needs replaced control hinges also vuinerable engine vibration aerodynamic turbulence landing shocks very unsettiing have rudder elevator aileron depart airplane However sometimes preferable having two hinges fail end up jammed control surface case far better detect weak hinge replace before anything bad happens airplanes take lot wear tear places suddenly fail due damage results day-today flying club newsletters receive tell about crash after crash resulting wing failure rubber bands breaking horizontal tails ripping off like crashes could prevented rapid complete examination general aircraft structure takes lot less time perform periodic aircraft system inspections repair broken airplane build new Besides Id rather buy fuel giow plugs pay results crash August 1979 issue Ribs Tales newsletter Greater Southwest Radio Con trol Club Texas contained short report about disastrous flying session headiined Trees2 Airplanes0 Newsletter editors often cast role anti-apathy agitators Mostly used edit too kind flail around generally dont much affect sitoation discovered following Carrier newsletter East Bay Radio Controllers California Ill bet did raise few eyebrows Four us got talking other day about fantastic situation found selves about $3700 per year spend ourselves little work plus money could really enjoy ourselves like fly model aircraft have own club no interference others have flying field can spend money within by-laws see fit make hobby enjoyable Maybe can hire ourselves gar dener take care field us have money Maybe can get carpenter make us some new tables renovate outhouse Maybe can get $50 month raffle Sound interesting should Its YOUR money will using After since YOU dont bother let feelings known proxy active members club can run see fit 112 Model Aviation AvPeAveA little piece electronic wizardry quickly easily reverses direction servo travel plugged between receiver servo will work positive pulse servos three four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 AF E/ Ini BOX 511E HIGGINSVILLE MO 64037 details send $1 latest catalog Add $50 1st Class return $1 hand ling direct Orders 816 584-7121