S loec ue George M Myers THE WATSON STABILIZER No isnt gyro hook up yaw rudder servo Helicopter convert servos function force controt yaw rate Whenever write about Helicopters people expectto see picture hover Dave Chesney Eat heart out control stick deflection means faster constant stabilized rate yawing no speedup gyroscope device tries main tain constant position space Watson Stabilizer doesnt care anything about its posi tion space regress bit bought Heliboy 80 kit November 1979 flew through Fall 1980 time found myself severe glitch problems sent Futaba radio back checkout substituted 1971 Pro-Line glitching continued Thereupon dismantled Heliboy finding engine swallowed too glow-plug elements sent back repair also meantime found tail-rotor drive section main reduction gear damaged ordered replacement Other problems found rectified Thanks York Diamon Futaba radio returned promptly likewise thanks Jim Newman Midwest Model Supply HP 61 F returned good condition along stern warnings about overcompressing engine burning nitrated fuels plus appropriate shims engines head However radio came back first put 3 6/600 sailboat spent spare time 1981 racing RC sailboat result Heliboy languished box parts Late 1981 received Watson Stabil izer evaluation Now should mentioned have received several letters readers inquired about device couldnt answer because had no personal experience make determined effort write about things have tested used long enough develop worthwhile opinion Heliboy reassembled adjusted Watson Stabilizer sat isfied flying before except glitches modified Kraft KPS-1 5 II servo accept Stabilizer installed Hellcopter went back flying Full instructions necessary modification included Stabilizer must specify servo youre going use placing order Watson Industries Inc 3041 Melby Road watson taoiiizer Ii piuggea mooitieu rau rr ervo Note Stabilizer about same size servo George reviews Watson unit depth month 28 Model Aviation wny us ueorge searching around Heliboy detector Read column Tuna Out Eau Claire WI 54701 Order Model RC-036 @ $16995 Basically add pigtail yaw servo joining black-to-black red-to-red bring power Stabilizer20 mA required about same servo idle joining signal lead specified land servos amplifier PC board through resistor supplied can see photos cant see open box sensor consists two piezo-electric crystals joined end-to-end 900 apart figure crystals mounted case end driven vibrate bending its resonant frequency14000 1700 cpm other crystal sense crystal equipped electrodes pick off voltage sense crystal bent As result sensor geometry HOW TO USE THE WATSON STABILIZER Procedure used Helicopter tail rotor servo 1 Turn transmitter Set rudder trim neutral Unplug Watson Stabilizer 2 Turn receiver Mark servos neutral position 3 Plug Watson Stabilizer Adjust ZERO potentiometer previous position 4 Move transmitter rudder control hard-over direction Mark extreme servo positions 5 Lay Watson Stabilizer hard surface floor have covered towel Roll Watson 900 faceto another Observe servo deflection Adjust GAl N potentiometerto get maximum jump equal os maximum deflection response control inputs Repeattill satisfied 6 If servos responses Watson Stabilizer unequal Left Right adjust SYMMETRY pot interacts ZERO will have work back forth between can induce some bending sense crystal moving assembly direction rolling direction However such bend ing ordinarily takes place very low frequencies crystals rolled about common axis some energy will transfer driver crystal sense crystal its resonant frequency notch filter electronics eliminates sensor voltages except resonantfrequency band Hence output sensor essentially zero Helicopter either stationary flying straight line direc tion flying through ioop rolL action produces significant output Watson unit swinging taiL output arranged oppose action caused mixing electrically control signals already inside tail-rotor servo result smoother flying first thing notice flying Stabil izer- equipped Helicopter nothing chopper obeys commands expect Only switch OFF Stabilizer added servo-operated ON/OFF switch system testing purposes realize something helping keep tail rotor under controL effect Stabilizer adds friction tail-rotor response about like what would happen hooked length chain tail boom let drag ground switch Stabilizer ON/OFF flight discover Stabilizer cuts down total response obtained yaw controL Thats because youve become accustomed seeing tail swing ever-increasing rate response hard-over command Stabilizer acting get slower constant rate swing rate adjustable units internal gain control set factory produce maximum servo deflection 300 against servo normally swings 450 can turn up till servo oscillates turn down get less stabilization wish suggestion use receive least may also discover trim control rudder stick has readjusted switch Stabilizer ON/OFF can done units internal zero control shown photos Once again set factory match servo specified order suggest use did point taking gallon fuel mean four hours flying have about eight hours September 1982 29 Heres watson Stabilizer wiring con nects servo Only attachment resistor shown wrapped heatshrink tubing peculiar given make servo Tne insiue story Watson Stabilizer Three PC boards filled components plus tube running down center contains drive sensor crystals Everything coated hot-melt glue except three user-adjustable potentiometers Note Deans plug polarized having two pins socketavoids mistakes its use Myers super-simple Installation forthe watson Stabilizer Heliboyit works experience Watson Stabilizer Heli boy has flown Larry Davidson Lee Berette Gary Scherer Tim Myers impressions have solicited pilot consensus beginner will fly success fully sooner Stabilizer providing machine first adjusted properly reason tail rotor positions reference axes pitch roll controls tail moves new position particularly Helicopter points its nose its easy make mistake slide chopper pound So concentrate tail rotor exclusion other con trols make lot mistakes help Stabilizer have time tend controls Beginners will like So will guys build Scale models therefore have large concern unplanned landings Some folks against kind stabilization because see something holy about doing themselves succeed power Some folks against Watson Stabili zer because can get same effect cheaper gyros Perhaps havent added up factors correctly As see pay following advantages 1 A smail lightweight package 2 No maintenance required Check gyro users 3 Superior shock resistance 4 No need extra battery pack switch harness charger instructions prescribe isolating Stabili zer acoustic vibration remember reading Dave Chesneys column encountered some problems mechanical vibration received unit wrapped -in foam took lazy mans roite doubled foam wrapped around stabilizer stuffed package between legs Heliboy servo tray filled rest gap foam stuck place loose strips masking tape installation shown photos Dumb luck hasnt unsurmountable problem vibra tion yet point thought having glitch problem caused vibration flattened collective pitch little problem went away Later found joints between servo tray side support failed glued together problem hasnt recurred Watson now offers RC-037 vibration-resistant design have problems Same price may saying yourself have no use gadget fly airplanes instructions explain use Watson Stabilizer yaw damper wing leveler fixed-wing air plane Actually cant lever wings put parallel earths surface because has no idea earth explained earlier What can tend keep wings wherever put can useful ever trying fly smoothly bumpy air nimble airplane Pylon Racing flying Biplane Pattern People such things may find real advantage Stabilizer Once again think beginners RC model airplane flying should enjoy help Stabilizer no matter what type oftrainer flying Time ran out before could put thought test will test ifrm wrong Ill tell later column Ill also tell rm right However point respect beginners very important Before installing Watson Stabilizer must have airplane Heli copter set up trimmed properly flight must have warp-free structure Continued page 124 Power supply requirements Output Sensitivity Output current Start-up time System frequency Resolution Accuracy Linearity Hysteresis Temperature drift Acceleration drift Cross-axis sensitivity Frequency response Output noise Operating temperature range Storage operating altitude Shock Life Dimensions Weight STABILIZER SPECIFICATIONS ____________________ Model RC036 4 6 VDC 2OmA maximum 17 VDC zero angular rate 4 VOC 74 VDC full scele displacement 1500/second full scale 1OmA maximum 15 seconds 260Hz 10% 0040/second 01% full scale whichever greater 25% 01% full scale None 030/second/0C 020/second/G 1% 4Hz 7SmV RMS o 500C Unlimited 200G transverse axis 10000G sense axis no time limit 10000 hours MTBF 64 x 35 x 29cm 250 x 138 x 113 110 grams 4 oz fl Sense Axis Drive Crystal Sense Crystal INSTALLATION Watson unIts sensors provide output proportional tothe rate turn aroundthe long axis shown below C Ko~1 UP FORWARD G should range 20 to45 aileron hookups andO 30 rudder hookups Watson unit gyroits space-agetechnology accelerometer uses piezoelectric crystals asthe driveand sensor units specaglve MTBF 10000 hours 30 Model Aviation 213 kfi1A1LdtS I/OQJ0MR/C GOODIES CcQQantjPO BOX 192 -CA 91408U UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXESYSTEM UAdjustable tableFlite wt 101 oz Miter guide4 Ch Complete 75g 10 metal Ix 4 RegSand discsServos SI 5$275NicadsChgr CH14Spec $2495Reg $27495 Ship $ 350Spec $15995 AIR CAPITALShip $ 650 ZINGER WOODReady-To-FlyFB 100 PROPS 6PockLess Radio EngineII 74-56 $5 2357 Span 8-4-5-65 63Ship SID rULLPWR9456 5 83 SERVO 3/4x 1 7/16 l0-4-5-6 6 39$65040-61 Engine1 x 19/16 1 381l-6775 720Reg $15995 Spec$139951 oz Dean s plugl24s69 65$2500 IReg $22 95 ISpec $13 95Other SizesSame Ship $250Discounts-Ship $200MOREI LtO~m$1 70 ~i~Add Calif Sales Tax 4-1/2% Surcharge Visa Master Cardj NE WJRIAT LAKES MODELMAHER & MOLD AMIA~ Deg Eogine POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763Podct TELEPHONE 517 362-6078 COMPOSITE ANSTRUTION 1% SCALE 12rD3AI TYPE 99 VALT-6 SNJ HARVARD AICHIU 633/8 Span 45- 60 Power 708Span60- 90Power$18800 $22800 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINT & DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EOUIPMENT & PAINTING REOLIIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT Whole Lot Left CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER KITs 9 HL GLIDERSI0THSC4LE XCUMENTAWN DWGS 3SATELLITEKITSOFNOTABLEFAIRCHILDS 17 OLD TIME GAS-- rAIRCHIL FCI Send25for 5RUBBER3NORDICI 1980 catata 9 COMPETITION GASGEORGEHCLAPP FUEL affd DT TIMERS -$1075 eachCENTRAL SCU4RE FAl Model Supply --- N /3036 OX7TORRAECA10INfCV $100 -REFUNDED WITH ORDER lower rpm 9-6 leaves room Radio Technique/Myers increase rpm flight Continued page 30 Conclusion would like give credit good friend Ken Little did flying photography Ken modeler going back late 20s like myself also professional photographer decide build model both wings changeable engines will give several possible combinations long wing 25 engine quite docile short wing 40 engine. Have fun SAFE FLYING IS NO ACCIDENT properly balanced control throws set up controls harmonized word harmonized mean controls should set up have ability provide equal pitch roll yaw rates helps have dual-rate transmitter because can obtain control harmony its screwdriver adjustments next point aware makes difference Watson oriented respect airplane cant just stuff some empty space go fly units long axis must have particular position respect airplane Helicopter center line likewise cover Watson box must lie particular direction case found best results Watsons long axis leaned back about 100 being parallel Heli copter rotor shaft cover aligned fore-and-aft direction true because unit totally free responses lateral acceleraton nor its responses lateral accelerations equal directions have experiment bit get right Once have got right works very welL dont get right will think its defective did Larry Davidson flies RC Helicopter very well performance gusty wind noticably better Watson Stabilizer Does tell something like give product boost performs well Radio Shack Metal Detector 63-3001 appears lead photo reason Heres scene time Saturday afternoon three-day weekend sched uled testing Watson Stabilizer time 610 pnt just 10 minutes after Larry Davidson has closed hobby shop spare parts rye got mail column soon Post Oflice opens Tuesday rm out yard flying Heliboy place place making adjustments suddenly engine stops flight Fortunately rm flying low fast happens landing no problem walk over Heliboy discover needle valve has fallen outsomeplace lawn spent next hour hands knees looking piece brass inch long neigh bor asked know anyone metal detector said No Tim said Radio Shack sells about $40 said Heres $40 Get can Tim came back unit getting dark started learning find metaL found lot scraps aluminum foilprobably gifts rotary power mower Tim pretty clever cut piece brass tubing about inch long look unit adjusted could find tubing easily pretty sure needle valve would turn up did Weekend saved much three days flying worth deadline Now know anyone wants buy metal detector Lease Rent George M Myers 70 Froehlich Farm Rd Hicksvjlla NY 11801 Distance Record Hiner Continued page 33 noon no lift encountered Before second launch Dale Folkening took some pics crew Sailplane second launch 1203 pm light lift encountered took over two hours Pegasus cover first 25 miles early part flight characterized small fairly strong thermals cloud base Jack would keep Pegasus thermal let drift downwind until thermal died Only time would Jack fly straight down road until Pegasus ran next thermaL kept average speed down because ground speed due wind drift about 5 mph thermaling Pegasus much easier see under cloud thermal clear blue sky Between thermals Pegasus flying ground speed of25 30 mph aggressive flying style would result higher speed also greater chance premature landing last hour 18 minutes flight covered 30 miles thermals now very 124 Modet Aviation
Edition: Model Aviation - 1982/09
Page Numbers: 28, 29, 30, 124
S loec ue George M Myers THE WATSON STABILIZER No isnt gyro hook up yaw rudder servo Helicopter convert servos function force controt yaw rate Whenever write about Helicopters people expectto see picture hover Dave Chesney Eat heart out control stick deflection means faster constant stabilized rate yawing no speedup gyroscope device tries main tain constant position space Watson Stabilizer doesnt care anything about its posi tion space regress bit bought Heliboy 80 kit November 1979 flew through Fall 1980 time found myself severe glitch problems sent Futaba radio back checkout substituted 1971 Pro-Line glitching continued Thereupon dismantled Heliboy finding engine swallowed too glow-plug elements sent back repair also meantime found tail-rotor drive section main reduction gear damaged ordered replacement Other problems found rectified Thanks York Diamon Futaba radio returned promptly likewise thanks Jim Newman Midwest Model Supply HP 61 F returned good condition along stern warnings about overcompressing engine burning nitrated fuels plus appropriate shims engines head However radio came back first put 3 6/600 sailboat spent spare time 1981 racing RC sailboat result Heliboy languished box parts Late 1981 received Watson Stabil izer evaluation Now should mentioned have received several letters readers inquired about device couldnt answer because had no personal experience make determined effort write about things have tested used long enough develop worthwhile opinion Heliboy reassembled adjusted Watson Stabilizer sat isfied flying before except glitches modified Kraft KPS-1 5 II servo accept Stabilizer installed Hellcopter went back flying Full instructions necessary modification included Stabilizer must specify servo youre going use placing order Watson Industries Inc 3041 Melby Road watson taoiiizer Ii piuggea mooitieu rau rr ervo Note Stabilizer about same size servo George reviews Watson unit depth month 28 Model Aviation wny us ueorge searching around Heliboy detector Read column Tuna Out Eau Claire WI 54701 Order Model RC-036 @ $16995 Basically add pigtail yaw servo joining black-to-black red-to-red bring power Stabilizer20 mA required about same servo idle joining signal lead specified land servos amplifier PC board through resistor supplied can see photos cant see open box sensor consists two piezo-electric crystals joined end-to-end 900 apart figure crystals mounted case end driven vibrate bending its resonant frequency14000 1700 cpm other crystal sense crystal equipped electrodes pick off voltage sense crystal bent As result sensor geometry HOW TO USE THE WATSON STABILIZER Procedure used Helicopter tail rotor servo 1 Turn transmitter Set rudder trim neutral Unplug Watson Stabilizer 2 Turn receiver Mark servos neutral position 3 Plug Watson Stabilizer Adjust ZERO potentiometer previous position 4 Move transmitter rudder control hard-over direction Mark extreme servo positions 5 Lay Watson Stabilizer hard surface floor have covered towel Roll Watson 900 faceto another Observe servo deflection Adjust GAl N potentiometerto get maximum jump equal os maximum deflection response control inputs Repeattill satisfied 6 If servos responses Watson Stabilizer unequal Left Right adjust SYMMETRY pot interacts ZERO will have work back forth between can induce some bending sense crystal moving assembly direction rolling direction However such bend ing ordinarily takes place very low frequencies crystals rolled about common axis some energy will transfer driver crystal sense crystal its resonant frequency notch filter electronics eliminates sensor voltages except resonantfrequency band Hence output sensor essentially zero Helicopter either stationary flying straight line direc tion flying through ioop rolL action produces significant output Watson unit swinging taiL output arranged oppose action caused mixing electrically control signals already inside tail-rotor servo result smoother flying first thing notice flying Stabil izer- equipped Helicopter nothing chopper obeys commands expect Only switch OFF Stabilizer added servo-operated ON/OFF switch system testing purposes realize something helping keep tail rotor under controL effect Stabilizer adds friction tail-rotor response about like what would happen hooked length chain tail boom let drag ground switch Stabilizer ON/OFF flight discover Stabilizer cuts down total response obtained yaw controL Thats because youve become accustomed seeing tail swing ever-increasing rate response hard-over command Stabilizer acting get slower constant rate swing rate adjustable units internal gain control set factory produce maximum servo deflection 300 against servo normally swings 450 can turn up till servo oscillates turn down get less stabilization wish suggestion use receive least may also discover trim control rudder stick has readjusted switch Stabilizer ON/OFF can done units internal zero control shown photos Once again set factory match servo specified order suggest use did point taking gallon fuel mean four hours flying have about eight hours September 1982 29 Heres watson Stabilizer wiring con nects servo Only attachment resistor shown wrapped heatshrink tubing peculiar given make servo Tne insiue story Watson Stabilizer Three PC boards filled components plus tube running down center contains drive sensor crystals Everything coated hot-melt glue except three user-adjustable potentiometers Note Deans plug polarized having two pins socketavoids mistakes its use Myers super-simple Installation forthe watson Stabilizer Heliboyit works experience Watson Stabilizer Heli boy has flown Larry Davidson Lee Berette Gary Scherer Tim Myers impressions have solicited pilot consensus beginner will fly success fully sooner Stabilizer providing machine first adjusted properly reason tail rotor positions reference axes pitch roll controls tail moves new position particularly Helicopter points its nose its easy make mistake slide chopper pound So concentrate tail rotor exclusion other con trols make lot mistakes help Stabilizer have time tend controls Beginners will like So will guys build Scale models therefore have large concern unplanned landings Some folks against kind stabilization because see something holy about doing themselves succeed power Some folks against Watson Stabili zer because can get same effect cheaper gyros Perhaps havent added up factors correctly As see pay following advantages 1 A smail lightweight package 2 No maintenance required Check gyro users 3 Superior shock resistance 4 No need extra battery pack switch harness charger instructions prescribe isolating Stabili zer acoustic vibration remember reading Dave Chesneys column encountered some problems mechanical vibration received unit wrapped -in foam took lazy mans roite doubled foam wrapped around stabilizer stuffed package between legs Heliboy servo tray filled rest gap foam stuck place loose strips masking tape installation shown photos Dumb luck hasnt unsurmountable problem vibra tion yet point thought having glitch problem caused vibration flattened collective pitch little problem went away Later found joints between servo tray side support failed glued together problem hasnt recurred Watson now offers RC-037 vibration-resistant design have problems Same price may saying yourself have no use gadget fly airplanes instructions explain use Watson Stabilizer yaw damper wing leveler fixed-wing air plane Actually cant lever wings put parallel earths surface because has no idea earth explained earlier What can tend keep wings wherever put can useful ever trying fly smoothly bumpy air nimble airplane Pylon Racing flying Biplane Pattern People such things may find real advantage Stabilizer Once again think beginners RC model airplane flying should enjoy help Stabilizer no matter what type oftrainer flying Time ran out before could put thought test will test ifrm wrong Ill tell later column Ill also tell rm right However point respect beginners very important Before installing Watson Stabilizer must have airplane Heli copter set up trimmed properly flight must have warp-free structure Continued page 124 Power supply requirements Output Sensitivity Output current Start-up time System frequency Resolution Accuracy Linearity Hysteresis Temperature drift Acceleration drift Cross-axis sensitivity Frequency response Output noise Operating temperature range Storage operating altitude Shock Life Dimensions Weight STABILIZER SPECIFICATIONS ____________________ Model RC036 4 6 VDC 2OmA maximum 17 VDC zero angular rate 4 VOC 74 VDC full scele displacement 1500/second full scale 1OmA maximum 15 seconds 260Hz 10% 0040/second 01% full scale whichever greater 25% 01% full scale None 030/second/0C 020/second/G 1% 4Hz 7SmV RMS o 500C Unlimited 200G transverse axis 10000G sense axis no time limit 10000 hours MTBF 64 x 35 x 29cm 250 x 138 x 113 110 grams 4 oz fl Sense Axis Drive Crystal Sense Crystal INSTALLATION Watson unIts sensors provide output proportional tothe rate turn aroundthe long axis shown below C Ko~1 UP FORWARD G should range 20 to45 aileron hookups andO 30 rudder hookups Watson unit gyroits space-agetechnology accelerometer uses piezoelectric crystals asthe driveand sensor units specaglve MTBF 10000 hours 30 Model Aviation 213 kfi1A1LdtS I/OQJ0MR/C GOODIES CcQQantjPO BOX 192 -CA 91408U UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXESYSTEM UAdjustable tableFlite wt 101 oz Miter guide4 Ch Complete 75g 10 metal Ix 4 RegSand discsServos SI 5$275NicadsChgr CH14Spec $2495Reg $27495 Ship $ 350Spec $15995 AIR CAPITALShip $ 650 ZINGER WOODReady-To-FlyFB 100 PROPS 6PockLess Radio EngineII 74-56 $5 2357 Span 8-4-5-65 63Ship SID rULLPWR9456 5 83 SERVO 3/4x 1 7/16 l0-4-5-6 6 39$65040-61 Engine1 x 19/16 1 381l-6775 720Reg $15995 Spec$139951 oz Dean s plugl24s69 65$2500 IReg $22 95 ISpec $13 95Other SizesSame Ship $250Discounts-Ship $200MOREI LtO~m$1 70 ~i~Add Calif Sales Tax 4-1/2% Surcharge Visa Master Cardj NE WJRIAT LAKES MODELMAHER & MOLD AMIA~ Deg Eogine POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763Podct TELEPHONE 517 362-6078 COMPOSITE ANSTRUTION 1% SCALE 12rD3AI TYPE 99 VALT-6 SNJ HARVARD AICHIU 633/8 Span 45- 60 Power 708Span60- 90Power$18800 $22800 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINT & DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EOUIPMENT & PAINTING REOLIIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT Whole Lot Left CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER KITs 9 HL GLIDERSI0THSC4LE XCUMENTAWN DWGS 3SATELLITEKITSOFNOTABLEFAIRCHILDS 17 OLD TIME GAS-- rAIRCHIL FCI Send25for 5RUBBER3NORDICI 1980 catata 9 COMPETITION GASGEORGEHCLAPP FUEL affd DT TIMERS -$1075 eachCENTRAL SCU4RE FAl Model Supply --- N /3036 OX7TORRAECA10INfCV $100 -REFUNDED WITH ORDER lower rpm 9-6 leaves room Radio Technique/Myers increase rpm flight Continued page 30 Conclusion would like give credit good friend Ken Little did flying photography Ken modeler going back late 20s like myself also professional photographer decide build model both wings changeable engines will give several possible combinations long wing 25 engine quite docile short wing 40 engine. Have fun SAFE FLYING IS NO ACCIDENT properly balanced control throws set up controls harmonized word harmonized mean controls should set up have ability provide equal pitch roll yaw rates helps have dual-rate transmitter because can obtain control harmony its screwdriver adjustments next point aware makes difference Watson oriented respect airplane cant just stuff some empty space go fly units long axis must have particular position respect airplane Helicopter center line likewise cover Watson box must lie particular direction case found best results Watsons long axis leaned back about 100 being parallel Heli copter rotor shaft cover aligned fore-and-aft direction true because unit totally free responses lateral acceleraton nor its responses lateral accelerations equal directions have experiment bit get right Once have got right works very welL dont get right will think its defective did Larry Davidson flies RC Helicopter very well performance gusty wind noticably better Watson Stabilizer Does tell something like give product boost performs well Radio Shack Metal Detector 63-3001 appears lead photo reason Heres scene time Saturday afternoon three-day weekend sched uled testing Watson Stabilizer time 610 pnt just 10 minutes after Larry Davidson has closed hobby shop spare parts rye got mail column soon Post Oflice opens Tuesday rm out yard flying Heliboy place place making adjustments suddenly engine stops flight Fortunately rm flying low fast happens landing no problem walk over Heliboy discover needle valve has fallen outsomeplace lawn spent next hour hands knees looking piece brass inch long neigh bor asked know anyone metal detector said No Tim said Radio Shack sells about $40 said Heres $40 Get can Tim came back unit getting dark started learning find metaL found lot scraps aluminum foilprobably gifts rotary power mower Tim pretty clever cut piece brass tubing about inch long look unit adjusted could find tubing easily pretty sure needle valve would turn up did Weekend saved much three days flying worth deadline Now know anyone wants buy metal detector Lease Rent George M Myers 70 Froehlich Farm Rd Hicksvjlla NY 11801 Distance Record Hiner Continued page 33 noon no lift encountered Before second launch Dale Folkening took some pics crew Sailplane second launch 1203 pm light lift encountered took over two hours Pegasus cover first 25 miles early part flight characterized small fairly strong thermals cloud base Jack would keep Pegasus thermal let drift downwind until thermal died Only time would Jack fly straight down road until Pegasus ran next thermaL kept average speed down because ground speed due wind drift about 5 mph thermaling Pegasus much easier see under cloud thermal clear blue sky Between thermals Pegasus flying ground speed of25 30 mph aggressive flying style would result higher speed also greater chance premature landing last hour 18 minutes flight covered 30 miles thermals now very 124 Modet Aviation
Edition: Model Aviation - 1982/09
Page Numbers: 28, 29, 30, 124
S loec ue George M Myers THE WATSON STABILIZER No isnt gyro hook up yaw rudder servo Helicopter convert servos function force controt yaw rate Whenever write about Helicopters people expectto see picture hover Dave Chesney Eat heart out control stick deflection means faster constant stabilized rate yawing no speedup gyroscope device tries main tain constant position space Watson Stabilizer doesnt care anything about its posi tion space regress bit bought Heliboy 80 kit November 1979 flew through Fall 1980 time found myself severe glitch problems sent Futaba radio back checkout substituted 1971 Pro-Line glitching continued Thereupon dismantled Heliboy finding engine swallowed too glow-plug elements sent back repair also meantime found tail-rotor drive section main reduction gear damaged ordered replacement Other problems found rectified Thanks York Diamon Futaba radio returned promptly likewise thanks Jim Newman Midwest Model Supply HP 61 F returned good condition along stern warnings about overcompressing engine burning nitrated fuels plus appropriate shims engines head However radio came back first put 3 6/600 sailboat spent spare time 1981 racing RC sailboat result Heliboy languished box parts Late 1981 received Watson Stabil izer evaluation Now should mentioned have received several letters readers inquired about device couldnt answer because had no personal experience make determined effort write about things have tested used long enough develop worthwhile opinion Heliboy reassembled adjusted Watson Stabilizer sat isfied flying before except glitches modified Kraft KPS-1 5 II servo accept Stabilizer installed Hellcopter went back flying Full instructions necessary modification included Stabilizer must specify servo youre going use placing order Watson Industries Inc 3041 Melby Road watson taoiiizer Ii piuggea mooitieu rau rr ervo Note Stabilizer about same size servo George reviews Watson unit depth month 28 Model Aviation wny us ueorge searching around Heliboy detector Read column Tuna Out Eau Claire WI 54701 Order Model RC-036 @ $16995 Basically add pigtail yaw servo joining black-to-black red-to-red bring power Stabilizer20 mA required about same servo idle joining signal lead specified land servos amplifier PC board through resistor supplied can see photos cant see open box sensor consists two piezo-electric crystals joined end-to-end 900 apart figure crystals mounted case end driven vibrate bending its resonant frequency14000 1700 cpm other crystal sense crystal equipped electrodes pick off voltage sense crystal bent As result sensor geometry HOW TO USE THE WATSON STABILIZER Procedure used Helicopter tail rotor servo 1 Turn transmitter Set rudder trim neutral Unplug Watson Stabilizer 2 Turn receiver Mark servos neutral position 3 Plug Watson Stabilizer Adjust ZERO potentiometer previous position 4 Move transmitter rudder control hard-over direction Mark extreme servo positions 5 Lay Watson Stabilizer hard surface floor have covered towel Roll Watson 900 faceto another Observe servo deflection Adjust GAl N potentiometerto get maximum jump equal os maximum deflection response control inputs Repeattill satisfied 6 If servos responses Watson Stabilizer unequal Left Right adjust SYMMETRY pot interacts ZERO will have work back forth between can induce some bending sense crystal moving assembly direction rolling direction However such bend ing ordinarily takes place very low frequencies crystals rolled about common axis some energy will transfer driver crystal sense crystal its resonant frequency notch filter electronics eliminates sensor voltages except resonantfrequency band Hence output sensor essentially zero Helicopter either stationary flying straight line direc tion flying through ioop rolL action produces significant output Watson unit swinging taiL output arranged oppose action caused mixing electrically control signals already inside tail-rotor servo result smoother flying first thing notice flying Stabil izer- equipped Helicopter nothing chopper obeys commands expect Only switch OFF Stabilizer added servo-operated ON/OFF switch system testing purposes realize something helping keep tail rotor under controL effect Stabilizer adds friction tail-rotor response about like what would happen hooked length chain tail boom let drag ground switch Stabilizer ON/OFF flight discover Stabilizer cuts down total response obtained yaw controL Thats because youve become accustomed seeing tail swing ever-increasing rate response hard-over command Stabilizer acting get slower constant rate swing rate adjustable units internal gain control set factory produce maximum servo deflection 300 against servo normally swings 450 can turn up till servo oscillates turn down get less stabilization wish suggestion use receive least may also discover trim control rudder stick has readjusted switch Stabilizer ON/OFF can done units internal zero control shown photos Once again set factory match servo specified order suggest use did point taking gallon fuel mean four hours flying have about eight hours September 1982 29 Heres watson Stabilizer wiring con nects servo Only attachment resistor shown wrapped heatshrink tubing peculiar given make servo Tne insiue story Watson Stabilizer Three PC boards filled components plus tube running down center contains drive sensor crystals Everything coated hot-melt glue except three user-adjustable potentiometers Note Deans plug polarized having two pins socketavoids mistakes its use Myers super-simple Installation forthe watson Stabilizer Heliboyit works experience Watson Stabilizer Heli boy has flown Larry Davidson Lee Berette Gary Scherer Tim Myers impressions have solicited pilot consensus beginner will fly success fully sooner Stabilizer providing machine first adjusted properly reason tail rotor positions reference axes pitch roll controls tail moves new position particularly Helicopter points its nose its easy make mistake slide chopper pound So concentrate tail rotor exclusion other con trols make lot mistakes help Stabilizer have time tend controls Beginners will like So will guys build Scale models therefore have large concern unplanned landings Some folks against kind stabilization because see something holy about doing themselves succeed power Some folks against Watson Stabili zer because can get same effect cheaper gyros Perhaps havent added up factors correctly As see pay following advantages 1 A smail lightweight package 2 No maintenance required Check gyro users 3 Superior shock resistance 4 No need extra battery pack switch harness charger instructions prescribe isolating Stabili zer acoustic vibration remember reading Dave Chesneys column encountered some problems mechanical vibration received unit wrapped -in foam took lazy mans roite doubled foam wrapped around stabilizer stuffed package between legs Heliboy servo tray filled rest gap foam stuck place loose strips masking tape installation shown photos Dumb luck hasnt unsurmountable problem vibra tion yet point thought having glitch problem caused vibration flattened collective pitch little problem went away Later found joints between servo tray side support failed glued together problem hasnt recurred Watson now offers RC-037 vibration-resistant design have problems Same price may saying yourself have no use gadget fly airplanes instructions explain use Watson Stabilizer yaw damper wing leveler fixed-wing air plane Actually cant lever wings put parallel earths surface because has no idea earth explained earlier What can tend keep wings wherever put can useful ever trying fly smoothly bumpy air nimble airplane Pylon Racing flying Biplane Pattern People such things may find real advantage Stabilizer Once again think beginners RC model airplane flying should enjoy help Stabilizer no matter what type oftrainer flying Time ran out before could put thought test will test ifrm wrong Ill tell later column Ill also tell rm right However point respect beginners very important Before installing Watson Stabilizer must have airplane Heli copter set up trimmed properly flight must have warp-free structure Continued page 124 Power supply requirements Output Sensitivity Output current Start-up time System frequency Resolution Accuracy Linearity Hysteresis Temperature drift Acceleration drift Cross-axis sensitivity Frequency response Output noise Operating temperature range Storage operating altitude Shock Life Dimensions Weight STABILIZER SPECIFICATIONS ____________________ Model RC036 4 6 VDC 2OmA maximum 17 VDC zero angular rate 4 VOC 74 VDC full scele displacement 1500/second full scale 1OmA maximum 15 seconds 260Hz 10% 0040/second 01% full scale whichever greater 25% 01% full scale None 030/second/0C 020/second/G 1% 4Hz 7SmV RMS o 500C Unlimited 200G transverse axis 10000G sense axis no time limit 10000 hours MTBF 64 x 35 x 29cm 250 x 138 x 113 110 grams 4 oz fl Sense Axis Drive Crystal Sense Crystal INSTALLATION Watson unIts sensors provide output proportional tothe rate turn aroundthe long axis shown below C Ko~1 UP FORWARD G should range 20 to45 aileron hookups andO 30 rudder hookups Watson unit gyroits space-agetechnology accelerometer uses piezoelectric crystals asthe driveand sensor units specaglve MTBF 10000 hours 30 Model Aviation 213 kfi1A1LdtS I/OQJ0MR/C GOODIES CcQQantjPO BOX 192 -CA 91408U UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXESYSTEM UAdjustable tableFlite wt 101 oz Miter guide4 Ch Complete 75g 10 metal Ix 4 RegSand discsServos SI 5$275NicadsChgr CH14Spec $2495Reg $27495 Ship $ 350Spec $15995 AIR CAPITALShip $ 650 ZINGER WOODReady-To-FlyFB 100 PROPS 6PockLess Radio EngineII 74-56 $5 2357 Span 8-4-5-65 63Ship SID rULLPWR9456 5 83 SERVO 3/4x 1 7/16 l0-4-5-6 6 39$65040-61 Engine1 x 19/16 1 381l-6775 720Reg $15995 Spec$139951 oz Dean s plugl24s69 65$2500 IReg $22 95 ISpec $13 95Other SizesSame Ship $250Discounts-Ship $200MOREI LtO~m$1 70 ~i~Add Calif Sales Tax 4-1/2% Surcharge Visa Master Cardj NE WJRIAT LAKES MODELMAHER & MOLD AMIA~ Deg Eogine POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763Podct TELEPHONE 517 362-6078 COMPOSITE ANSTRUTION 1% SCALE 12rD3AI TYPE 99 VALT-6 SNJ HARVARD AICHIU 633/8 Span 45- 60 Power 708Span60- 90Power$18800 $22800 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINT & DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EOUIPMENT & PAINTING REOLIIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT Whole Lot Left CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER KITs 9 HL GLIDERSI0THSC4LE XCUMENTAWN DWGS 3SATELLITEKITSOFNOTABLEFAIRCHILDS 17 OLD TIME GAS-- rAIRCHIL FCI Send25for 5RUBBER3NORDICI 1980 catata 9 COMPETITION GASGEORGEHCLAPP FUEL affd DT TIMERS -$1075 eachCENTRAL SCU4RE FAl Model Supply --- N /3036 OX7TORRAECA10INfCV $100 -REFUNDED WITH ORDER lower rpm 9-6 leaves room Radio Technique/Myers increase rpm flight Continued page 30 Conclusion would like give credit good friend Ken Little did flying photography Ken modeler going back late 20s like myself also professional photographer decide build model both wings changeable engines will give several possible combinations long wing 25 engine quite docile short wing 40 engine. Have fun SAFE FLYING IS NO ACCIDENT properly balanced control throws set up controls harmonized word harmonized mean controls should set up have ability provide equal pitch roll yaw rates helps have dual-rate transmitter because can obtain control harmony its screwdriver adjustments next point aware makes difference Watson oriented respect airplane cant just stuff some empty space go fly units long axis must have particular position respect airplane Helicopter center line likewise cover Watson box must lie particular direction case found best results Watsons long axis leaned back about 100 being parallel Heli copter rotor shaft cover aligned fore-and-aft direction true because unit totally free responses lateral acceleraton nor its responses lateral accelerations equal directions have experiment bit get right Once have got right works very welL dont get right will think its defective did Larry Davidson flies RC Helicopter very well performance gusty wind noticably better Watson Stabilizer Does tell something like give product boost performs well Radio Shack Metal Detector 63-3001 appears lead photo reason Heres scene time Saturday afternoon three-day weekend sched uled testing Watson Stabilizer time 610 pnt just 10 minutes after Larry Davidson has closed hobby shop spare parts rye got mail column soon Post Oflice opens Tuesday rm out yard flying Heliboy place place making adjustments suddenly engine stops flight Fortunately rm flying low fast happens landing no problem walk over Heliboy discover needle valve has fallen outsomeplace lawn spent next hour hands knees looking piece brass inch long neigh bor asked know anyone metal detector said No Tim said Radio Shack sells about $40 said Heres $40 Get can Tim came back unit getting dark started learning find metaL found lot scraps aluminum foilprobably gifts rotary power mower Tim pretty clever cut piece brass tubing about inch long look unit adjusted could find tubing easily pretty sure needle valve would turn up did Weekend saved much three days flying worth deadline Now know anyone wants buy metal detector Lease Rent George M Myers 70 Froehlich Farm Rd Hicksvjlla NY 11801 Distance Record Hiner Continued page 33 noon no lift encountered Before second launch Dale Folkening took some pics crew Sailplane second launch 1203 pm light lift encountered took over two hours Pegasus cover first 25 miles early part flight characterized small fairly strong thermals cloud base Jack would keep Pegasus thermal let drift downwind until thermal died Only time would Jack fly straight down road until Pegasus ran next thermaL kept average speed down because ground speed due wind drift about 5 mph thermaling Pegasus much easier see under cloud thermal clear blue sky Between thermals Pegasus flying ground speed of25 30 mph aggressive flying style would result higher speed also greater chance premature landing last hour 18 minutes flight covered 30 miles thermals now very 124 Modet Aviation
Edition: Model Aviation - 1982/09
Page Numbers: 28, 29, 30, 124
S loec ue George M Myers THE WATSON STABILIZER No isnt gyro hook up yaw rudder servo Helicopter convert servos function force controt yaw rate Whenever write about Helicopters people expectto see picture hover Dave Chesney Eat heart out control stick deflection means faster constant stabilized rate yawing no speedup gyroscope device tries main tain constant position space Watson Stabilizer doesnt care anything about its posi tion space regress bit bought Heliboy 80 kit November 1979 flew through Fall 1980 time found myself severe glitch problems sent Futaba radio back checkout substituted 1971 Pro-Line glitching continued Thereupon dismantled Heliboy finding engine swallowed too glow-plug elements sent back repair also meantime found tail-rotor drive section main reduction gear damaged ordered replacement Other problems found rectified Thanks York Diamon Futaba radio returned promptly likewise thanks Jim Newman Midwest Model Supply HP 61 F returned good condition along stern warnings about overcompressing engine burning nitrated fuels plus appropriate shims engines head However radio came back first put 3 6/600 sailboat spent spare time 1981 racing RC sailboat result Heliboy languished box parts Late 1981 received Watson Stabil izer evaluation Now should mentioned have received several letters readers inquired about device couldnt answer because had no personal experience make determined effort write about things have tested used long enough develop worthwhile opinion Heliboy reassembled adjusted Watson Stabilizer sat isfied flying before except glitches modified Kraft KPS-1 5 II servo accept Stabilizer installed Hellcopter went back flying Full instructions necessary modification included Stabilizer must specify servo youre going use placing order Watson Industries Inc 3041 Melby Road watson taoiiizer Ii piuggea mooitieu rau rr ervo Note Stabilizer about same size servo George reviews Watson unit depth month 28 Model Aviation wny us ueorge searching around Heliboy detector Read column Tuna Out Eau Claire WI 54701 Order Model RC-036 @ $16995 Basically add pigtail yaw servo joining black-to-black red-to-red bring power Stabilizer20 mA required about same servo idle joining signal lead specified land servos amplifier PC board through resistor supplied can see photos cant see open box sensor consists two piezo-electric crystals joined end-to-end 900 apart figure crystals mounted case end driven vibrate bending its resonant frequency14000 1700 cpm other crystal sense crystal equipped electrodes pick off voltage sense crystal bent As result sensor geometry HOW TO USE THE WATSON STABILIZER Procedure used Helicopter tail rotor servo 1 Turn transmitter Set rudder trim neutral Unplug Watson Stabilizer 2 Turn receiver Mark servos neutral position 3 Plug Watson Stabilizer Adjust ZERO potentiometer previous position 4 Move transmitter rudder control hard-over direction Mark extreme servo positions 5 Lay Watson Stabilizer hard surface floor have covered towel Roll Watson 900 faceto another Observe servo deflection Adjust GAl N potentiometerto get maximum jump equal os maximum deflection response control inputs Repeattill satisfied 6 If servos responses Watson Stabilizer unequal Left Right adjust SYMMETRY pot interacts ZERO will have work back forth between can induce some bending sense crystal moving assembly direction rolling direction However such bend ing ordinarily takes place very low frequencies crystals rolled about common axis some energy will transfer driver crystal sense crystal its resonant frequency notch filter electronics eliminates sensor voltages except resonantfrequency band Hence output sensor essentially zero Helicopter either stationary flying straight line direc tion flying through ioop rolL action produces significant output Watson unit swinging taiL output arranged oppose action caused mixing electrically control signals already inside tail-rotor servo result smoother flying first thing notice flying Stabil izer- equipped Helicopter nothing chopper obeys commands expect Only switch OFF Stabilizer added servo-operated ON/OFF switch system testing purposes realize something helping keep tail rotor under controL effect Stabilizer adds friction tail-rotor response about like what would happen hooked length chain tail boom let drag ground switch Stabilizer ON/OFF flight discover Stabilizer cuts down total response obtained yaw controL Thats because youve become accustomed seeing tail swing ever-increasing rate response hard-over command Stabilizer acting get slower constant rate swing rate adjustable units internal gain control set factory produce maximum servo deflection 300 against servo normally swings 450 can turn up till servo oscillates turn down get less stabilization wish suggestion use receive least may also discover trim control rudder stick has readjusted switch Stabilizer ON/OFF can done units internal zero control shown photos Once again set factory match servo specified order suggest use did point taking gallon fuel mean four hours flying have about eight hours September 1982 29 Heres watson Stabilizer wiring con nects servo Only attachment resistor shown wrapped heatshrink tubing peculiar given make servo Tne insiue story Watson Stabilizer Three PC boards filled components plus tube running down center contains drive sensor crystals Everything coated hot-melt glue except three user-adjustable potentiometers Note Deans plug polarized having two pins socketavoids mistakes its use Myers super-simple Installation forthe watson Stabilizer Heliboyit works experience Watson Stabilizer Heli boy has flown Larry Davidson Lee Berette Gary Scherer Tim Myers impressions have solicited pilot consensus beginner will fly success fully sooner Stabilizer providing machine first adjusted properly reason tail rotor positions reference axes pitch roll controls tail moves new position particularly Helicopter points its nose its easy make mistake slide chopper pound So concentrate tail rotor exclusion other con trols make lot mistakes help Stabilizer have time tend controls Beginners will like So will guys build Scale models therefore have large concern unplanned landings Some folks against kind stabilization because see something holy about doing themselves succeed power Some folks against Watson Stabili zer because can get same effect cheaper gyros Perhaps havent added up factors correctly As see pay following advantages 1 A smail lightweight package 2 No maintenance required Check gyro users 3 Superior shock resistance 4 No need extra battery pack switch harness charger instructions prescribe isolating Stabili zer acoustic vibration remember reading Dave Chesneys column encountered some problems mechanical vibration received unit wrapped -in foam took lazy mans roite doubled foam wrapped around stabilizer stuffed package between legs Heliboy servo tray filled rest gap foam stuck place loose strips masking tape installation shown photos Dumb luck hasnt unsurmountable problem vibra tion yet point thought having glitch problem caused vibration flattened collective pitch little problem went away Later found joints between servo tray side support failed glued together problem hasnt recurred Watson now offers RC-037 vibration-resistant design have problems Same price may saying yourself have no use gadget fly airplanes instructions explain use Watson Stabilizer yaw damper wing leveler fixed-wing air plane Actually cant lever wings put parallel earths surface because has no idea earth explained earlier What can tend keep wings wherever put can useful ever trying fly smoothly bumpy air nimble airplane Pylon Racing flying Biplane Pattern People such things may find real advantage Stabilizer Once again think beginners RC model airplane flying should enjoy help Stabilizer no matter what type oftrainer flying Time ran out before could put thought test will test ifrm wrong Ill tell later column Ill also tell rm right However point respect beginners very important Before installing Watson Stabilizer must have airplane Heli copter set up trimmed properly flight must have warp-free structure Continued page 124 Power supply requirements Output Sensitivity Output current Start-up time System frequency Resolution Accuracy Linearity Hysteresis Temperature drift Acceleration drift Cross-axis sensitivity Frequency response Output noise Operating temperature range Storage operating altitude Shock Life Dimensions Weight STABILIZER SPECIFICATIONS ____________________ Model RC036 4 6 VDC 2OmA maximum 17 VDC zero angular rate 4 VOC 74 VDC full scele displacement 1500/second full scale 1OmA maximum 15 seconds 260Hz 10% 0040/second 01% full scale whichever greater 25% 01% full scale None 030/second/0C 020/second/G 1% 4Hz 7SmV RMS o 500C Unlimited 200G transverse axis 10000G sense axis no time limit 10000 hours MTBF 64 x 35 x 29cm 250 x 138 x 113 110 grams 4 oz fl Sense Axis Drive Crystal Sense Crystal INSTALLATION Watson unIts sensors provide output proportional tothe rate turn aroundthe long axis shown below C Ko~1 UP FORWARD G should range 20 to45 aileron hookups andO 30 rudder hookups Watson unit gyroits space-agetechnology accelerometer uses piezoelectric crystals asthe driveand sensor units specaglve MTBF 10000 hours 30 Model Aviation 213 kfi1A1LdtS I/OQJ0MR/C GOODIES CcQQantjPO BOX 192 -CA 91408U UHEAVY DUTYSPECIAL 825I 4-IN SANDERDELUXESYSTEM UAdjustable tableFlite wt 101 oz Miter guide4 Ch Complete 75g 10 metal Ix 4 RegSand discsServos SI 5$275NicadsChgr CH14Spec $2495Reg $27495 Ship $ 350Spec $15995 AIR CAPITALShip $ 650 ZINGER WOODReady-To-FlyFB 100 PROPS 6PockLess Radio EngineII 74-56 $5 2357 Span 8-4-5-65 63Ship SID rULLPWR9456 5 83 SERVO 3/4x 1 7/16 l0-4-5-6 6 39$65040-61 Engine1 x 19/16 1 381l-6775 720Reg $15995 Spec$139951 oz Dean s plugl24s69 65$2500 IReg $22 95 ISpec $13 95Other SizesSame Ship $250Discounts-Ship $200MOREI LtO~m$1 70 ~i~Add Calif Sales Tax 4-1/2% Surcharge Visa Master Cardj NE WJRIAT LAKES MODELMAHER & MOLD AMIA~ Deg Eogine POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763Podct TELEPHONE 517 362-6078 COMPOSITE ANSTRUTION 1% SCALE 12rD3AI TYPE 99 VALT-6 SNJ HARVARD AICHIU 633/8 Span 45- 60 Power 708Span60- 90Power$18800 $22800 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINT & DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EOUIPMENT & PAINTING REOLIIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT Whole Lot Left CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER KITs 9 HL GLIDERSI0THSC4LE XCUMENTAWN DWGS 3SATELLITEKITSOFNOTABLEFAIRCHILDS 17 OLD TIME GAS-- rAIRCHIL FCI Send25for 5RUBBER3NORDICI 1980 catata 9 COMPETITION GASGEORGEHCLAPP FUEL affd DT TIMERS -$1075 eachCENTRAL SCU4RE FAl Model Supply --- N /3036 OX7TORRAECA10INfCV $100 -REFUNDED WITH ORDER lower rpm 9-6 leaves room Radio Technique/Myers increase rpm flight Continued page 30 Conclusion would like give credit good friend Ken Little did flying photography Ken modeler going back late 20s like myself also professional photographer decide build model both wings changeable engines will give several possible combinations long wing 25 engine quite docile short wing 40 engine. Have fun SAFE FLYING IS NO ACCIDENT properly balanced control throws set up controls harmonized word harmonized mean controls should set up have ability provide equal pitch roll yaw rates helps have dual-rate transmitter because can obtain control harmony its screwdriver adjustments next point aware makes difference Watson oriented respect airplane cant just stuff some empty space go fly units long axis must have particular position respect airplane Helicopter center line likewise cover Watson box must lie particular direction case found best results Watsons long axis leaned back about 100 being parallel Heli copter rotor shaft cover aligned fore-and-aft direction true because unit totally free responses lateral acceleraton nor its responses lateral accelerations equal directions have experiment bit get right Once have got right works very welL dont get right will think its defective did Larry Davidson flies RC Helicopter very well performance gusty wind noticably better Watson Stabilizer Does tell something like give product boost performs well Radio Shack Metal Detector 63-3001 appears lead photo reason Heres scene time Saturday afternoon three-day weekend sched uled testing Watson Stabilizer time 610 pnt just 10 minutes after Larry Davidson has closed hobby shop spare parts rye got mail column soon Post Oflice opens Tuesday rm out yard flying Heliboy place place making adjustments suddenly engine stops flight Fortunately rm flying low fast happens landing no problem walk over Heliboy discover needle valve has fallen outsomeplace lawn spent next hour hands knees looking piece brass inch long neigh bor asked know anyone metal detector said No Tim said Radio Shack sells about $40 said Heres $40 Get can Tim came back unit getting dark started learning find metaL found lot scraps aluminum foilprobably gifts rotary power mower Tim pretty clever cut piece brass tubing about inch long look unit adjusted could find tubing easily pretty sure needle valve would turn up did Weekend saved much three days flying worth deadline Now know anyone wants buy metal detector Lease Rent George M Myers 70 Froehlich Farm Rd Hicksvjlla NY 11801 Distance Record Hiner Continued page 33 noon no lift encountered Before second launch Dale Folkening took some pics crew Sailplane second launch 1203 pm light lift encountered took over two hours Pegasus cover first 25 miles early part flight characterized small fairly strong thermals cloud base Jack would keep Pegasus thermal let drift downwind until thermal died Only time would Jack fly straight down road until Pegasus ran next thermaL kept average speed down because ground speed due wind drift about 5 mph thermaling Pegasus much easier see under cloud thermal clear blue sky Between thermals Pegasus flying ground speed of25 30 mph aggressive flying style would result higher speed also greater chance premature landing last hour 18 minutes flight covered 30 miles thermals now very 124 Modet Aviation