uur author uses SARPI range-check Astro Hog transmitter remains flight box no helper required forthe test SINCE THE DAYS crystal sets has known best way tell radio receiver works properly listen profound notion came after several years frustrating attempts tune range-check RC receivers using recommended methods range-checking receiver may walk away model waggling control surface rudder instance keep going until control following transmitter accurately n see well Alternatively can hold model leaving transmitter behind helper occasionally waggles sticks can watch servo response closely listen jit tering will easy either techniques tell sure what working range system servos designed give us information circuit shown simply CMOS current amplifier can plugged free receiver servo output output amplifier drives tran sistor-radio-type earphone used listen servo pulses received transmitter pulses sound like continuous buzz about 50 Hz see Fig 1 buzz present system SARPI* receiving OK buzz stops sounds intermittent system re ceiving corredtly Its simple method works well because ear very sensitive change sound pattern single missed pulse clearly audible purpose doing regular range checks catch unsuspected system faults before aircraft flown first time day Once have established normal antenna-down Test Range particular system can easily spot incipient disaster model safely ground example day find can get steady signal within about 30 paces transmitter normally go 50 paces can sure something seriously wrong faults have found range drops like usually involve 1 under charged batteries battery bad *Simple Auditory Receiver Performance Indicator 56 Model Aviation Hooked up ready use SARPI plugged aileron lead earphone plugs pilot Its inexpensive easy build requires no power its own yet provides simple high ly accu rate way determine radios range detect range has changed An easy one-evening proj-0 ect circuito -0 101 IlI alsoletsyousee hear re- S19nal~jjjJ er rejectingBat161514131211109000 4049 signals \Zr00 unwantedcap fdfl1/8 Jack EJohn W PowellBatO~jfiI0 000 PICTORIAL cell 2 poor contact frayed wire solder joint receiver battery con nector 3 damaged crystal 4 dis connected poorly-deployed antennas Transmitter antennas have habit com ing unscrewed bases some times wire link antenna transmitter circuit board gets broken off Receiver antenna wires supposed stretched out say inside Sailplane fuselage come adrift present much less full length RF signal problems often can something about field saving airplane days flying Another possibility although no sudden change Test Range appears system just good new last season probably indicates need align FIG1 H20 ms Typical SIGNAL AT SERVO OUTPUT ment returning system manufacturer repair agency should come up very often helpful have performance baseline equip ment can recognize longterm drop efficiency range-checking flying field get frequency pin plug amplifier INSULATED WIRE BARE WIRE receiver turn transmitter antenna down leave sitting flight box No helper needed walk away listening first pulse dropouts short servo extension lead can left plugged receiver model convenience aileronequipped model fly lead servo can used test range system maximum distance pulse buzz uninterrupted no matter orient model transmitter find some occasional pulse SCHEMATIC Servo Signal Battery N 1/8 Earphone Jack mfd r1 riri Al Pin 1 V5 Pin 8 100 A vvv 0 dropouts occur close range de pending angle receiver antenna whether body some other bulky object gets between transmitter receiver AM sets seem have shorter antenna-down test range FM sets have tried though cannot infer FM sets have greater operating rangeContinued page 148 4049 12 15 4 2 010 11 14 o-K August 1986 57 Close look circuit board shows component locations arrangement wiring Note mixture bare insulated wire works fine leads dressed shown 0 0 0 0 C 0 0 0 0 C C 0 0 COMMANOO FOR h/ TEXACO B-70 FREEFLIGHT TAUBE 1/2A RC POTENT 30 lightweight Past Duilding P-SO Pro-Rolled Motor Tube Tisaus Prop Machine Cut Ribs Rubber included Only $1295 0 0 0 0 0 0 0 S 0 0 0 0 $2595 0 1795 2250 0 0 0 S 0 0 0 0 Sitd SASE Par Urochure Add $300 Sllppdng Hafldtlng COD Add $200 Caild Am Add 6% Tax Meeter Card & Visa 116 065-3669 Sat & Sun Phauts Models PO Sax 604 Poleomn CA 96630 0 oeooooOOOeeooe..o Now know take great skill autorotate machine prescribed pad altitude motor out experience has also shown experience engine failure hover drag tail rotor grass damage machine always less freewheel device fitted reason believe mandatory model Helicopter fitted autorotation regardless fliers skill level common crashes beginner occurs has started hovering model turns its nose towards him slightly flier becomes confused former fixed-wing pilot invariably gives Up elevator panic Helicopter promptly backs up drags its tail rotor ground model has autorotation main rotor simply runs away problem usually doesnt stress tall rotor gear box tear teeth out main reduction gear thinking purchasing model Helicopter can afford extra cost autorotation means get think will save time money long run BCNU Larry Jolly 5501 W Coma Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 55 ie separate channel motor cutoff RACE PROCEDURES/SCORING As speci fied current rules Formula except course length shall follow QM Short Course layout 1705 miles 10 laps race shall started simultaneous hand-launch NOTE six-cell 72 V motor battery size selected permit fast charging 12 V source However goal standardize seven cells 84 V similar events flown other regions country six-cell battery tends equalize performance differences tween various motors also RECOMMENDED EQUIPMENT Aircraft kits Barbarian Hummingbird JM Glascraft Lightning Electric Motor Design Fast Eddy Hobby Horn Wasp Leisure Elec tronics Ohm-My-Gosh Model Builder p1 ans Motors Challenger 05 Super Ferrite 05 Astro Flight LT5O Competition Wind Lei sure Electronics Batteries Sanyo SR rules specifically drafted permit wide variety motors aircraft types flown resultant response event entries will determine final version Kindly take few minutes read over rules submit comments Remember first cut subject change depending comments Dont forget years Nats Lake Charles LA past has perfect site Next month Ill have some helpful tips improve flying See Bill Hager 706 Glen Haven Dr Conroe TX 77385 SARPI/Powel Continued page 57 earphone method can also serve quick reference check system operation after hard-landing incident crash does check servos themselves quickly tested normal stickwaggling inspection sharing flying site other fliers using adjacent RC channels helpful have non-destructive means checking systems sensitivity inter ference Using servos output indi cator can exciting interference pulses received since spurious commands can spin servos wrap pushrods linkages spaghetti safer technique disconnect servos use SARPI instead can experiment freely listening different distances other fliersand transmitter off antenna down up etc no damage can occur equip ment Interference will change steady buzz syncopated beat some static noise may heard Construction circuit requires minimum components can found Radio Shack stores except servo lead must obtained RC dealer Since us equipped make PC boards have shown circuit wired small IC matrix board ease assembly links possible made bare solid wire Note wires must positioned shown pictorial avoid shorts obtained small-gauge bare wire stripping some heavy stranded hookup wire using individual strands Layout criticalexcept avoiding shorts solder bridges components mounted silkscreened face board copper use IC socket observe polarity 10 mfd capacitor IC must inserted its socket correct orientation wiring socket put dab paint marker adjacent Pin 1 both sides board later reference Care must taken establish identity servo leads receiver Although probably worst will hap pen reversed connector wiring loss 4049 4050 IC circuit certainly wont work either sets servo leads color-coded red V black V some other color signal lead battery connector lead similar servo leads try checking battery wiring voltmeter find pin nection World Engines Airtronics leads shown Fig 2 FIG 2 Sq No d Eng ne Sq Aon TYPICAL SERVO PLUG LEADS construction sequence 1 Epoxy -in earphone socket top surface 148 Model Aviation MASTER AIRSCREW ~RAIRSC REW 12x8 Folder1195 15x12 Folder..1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 0 0 0 0 0 0 0 0 0 0 ZO NA SAWS famous line hobby aews Razor #200 Universal #500 P0 Box 3967 Torrance CA 90610 Replacement Blades available dealer FAIModei Supply U GRAPHICS STRIPING TAPE 60 feet3 sizes thein price ofpackage 36 -4---- /16 OETE 420 BbyIon Road Hoshzn, PA Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices 904 478-6745 RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft II Line EhIEI Futabe 43 West Nine Mile Rd Pensacola FL 32514 mm- K * Sales ServiceDealer Inquiries Welcome * board position shown also soldered retaining wire over jack 2 Solder IC socket Mark Pin 1 both surfaces 3 Install resistor tan talum capacitor capacitor must oriented shown 4 Install bare wire links dress neatly 5 Make remaining connections insulated wire 6 Attach servo lead appropriate pads Put IC its socket Carefully check wiring against pictorial schematic before plugging circuit receiver well plug earphone plug SARPI servo socket receiver Switch system transmitter steady loud buzz should heard transmitter off should no sound Note some FM receivers normal hear occasional single clicks transmitter off receiver picks up random noise Parts list Radio Shack catalog num bers Multipurpose bus board 276-150 @ 79 ea Type 4049 4050 CMOS hex buffer IC 276-2449 @ $119 ea 16-pin DIP socket 276-1998 @ 89/2 Enclosed -injack socket 274-297 @ $11 9/2 100ohm W resistor 271-012 @ 19/3 10 mfd tantalum capacitor 272-1436 @ 69 ea Mono earphone -in plug 33-175 @ $149 ea Servo lead suit RC system Hookup wire small-gauge solid eg 26 30 bare insulated FF Duration/Murphy Continued page 61 Aerospace Composite Products 28 Crosswood Road Farmington CT 06032 final item subject photo picked up Toledo sent Ken Curtis Curtis Model Products 10105 Hamil ton Hills Lane Indianapolis IN 46250 Kens new hand-launched glider kit calls Thermalier spans 18 has wing area 56 sq Ken admits design influenced once-popular Eaglet Kens variation has D-T system fuselage nose design improves rollout transition top climb kit contains excellent materials includ ing balsa hardwood parts clay D-T line get penny backit has dual use nose weight D-T function hobby shop cannot supply needs send $595 kit include extra dollar postage packing above ad dress Ken will gladly send Therma 11cr Youll get money s worthplus penny back Newsletter Month Since have expounded finalization designeligibility list Nostalgia Gas events issue thought would opportune proper honor club newsletter its editor originally initiated events Satellite newsletter San Valeers its capable editor Ralph Prey San Valeers current president Terry Thor kildsen vice-president Ed Hopkins Mike Myers handles club monies Ralph gets paperwork secretary newsletter editor Satellite newsletter certainly no newcomer competition Free Flighters its mimeographed sheets have relayed news views contest notices contest results four corners Free Flight years Seldom issue does contain least building engine tip Free Flight controversy brew ing somewhere can depend Satellite defend Southern California fliers posi tion fine publication great tradi tion Should wish begin receiving Satellite send $5 covers 12 issues Ralph Prey 4859 W 97th Street Inglewood CA 90301 Camera timers inexpensive reliable K-Mart camera timers back ever gone least absent area about three years Anyway Continued page 152 1- ROLLED PLANS Ui1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 BC D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifiersea 50 Surgical Tubing1 Oft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX 0O 6 August 1986 149 II'I PROPASSEMBLY #109-ELECTRIC ONLY PROP HUB ASSEMBLY #1GM 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #lOUA Available 7x 25 7x 3 7x 35 Bs 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 Available Ix 3 $400 per blade $800 per pair PROPHUBASSEMBLY# 111 For2540 engines electric motor equivalent 20 grams $2000 PROP BLADES FOR HUB # 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line
Edition: Model Aviation - 1986/08
Page Numbers: 56, 57, 148, 149
uur author uses SARPI range-check Astro Hog transmitter remains flight box no helper required forthe test SINCE THE DAYS crystal sets has known best way tell radio receiver works properly listen profound notion came after several years frustrating attempts tune range-check RC receivers using recommended methods range-checking receiver may walk away model waggling control surface rudder instance keep going until control following transmitter accurately n see well Alternatively can hold model leaving transmitter behind helper occasionally waggles sticks can watch servo response closely listen jit tering will easy either techniques tell sure what working range system servos designed give us information circuit shown simply CMOS current amplifier can plugged free receiver servo output output amplifier drives tran sistor-radio-type earphone used listen servo pulses received transmitter pulses sound like continuous buzz about 50 Hz see Fig 1 buzz present system SARPI* receiving OK buzz stops sounds intermittent system re ceiving corredtly Its simple method works well because ear very sensitive change sound pattern single missed pulse clearly audible purpose doing regular range checks catch unsuspected system faults before aircraft flown first time day Once have established normal antenna-down Test Range particular system can easily spot incipient disaster model safely ground example day find can get steady signal within about 30 paces transmitter normally go 50 paces can sure something seriously wrong faults have found range drops like usually involve 1 under charged batteries battery bad *Simple Auditory Receiver Performance Indicator 56 Model Aviation Hooked up ready use SARPI plugged aileron lead earphone plugs pilot Its inexpensive easy build requires no power its own yet provides simple high ly accu rate way determine radios range detect range has changed An easy one-evening proj-0 ect circuito -0 101 IlI alsoletsyousee hear re- S19nal~jjjJ er rejectingBat161514131211109000 4049 signals \Zr00 unwantedcap fdfl1/8 Jack EJohn W PowellBatO~jfiI0 000 PICTORIAL cell 2 poor contact frayed wire solder joint receiver battery con nector 3 damaged crystal 4 dis connected poorly-deployed antennas Transmitter antennas have habit com ing unscrewed bases some times wire link antenna transmitter circuit board gets broken off Receiver antenna wires supposed stretched out say inside Sailplane fuselage come adrift present much less full length RF signal problems often can something about field saving airplane days flying Another possibility although no sudden change Test Range appears system just good new last season probably indicates need align FIG1 H20 ms Typical SIGNAL AT SERVO OUTPUT ment returning system manufacturer repair agency should come up very often helpful have performance baseline equip ment can recognize longterm drop efficiency range-checking flying field get frequency pin plug amplifier INSULATED WIRE BARE WIRE receiver turn transmitter antenna down leave sitting flight box No helper needed walk away listening first pulse dropouts short servo extension lead can left plugged receiver model convenience aileronequipped model fly lead servo can used test range system maximum distance pulse buzz uninterrupted no matter orient model transmitter find some occasional pulse SCHEMATIC Servo Signal Battery N 1/8 Earphone Jack mfd r1 riri Al Pin 1 V5 Pin 8 100 A vvv 0 dropouts occur close range de pending angle receiver antenna whether body some other bulky object gets between transmitter receiver AM sets seem have shorter antenna-down test range FM sets have tried though cannot infer FM sets have greater operating rangeContinued page 148 4049 12 15 4 2 010 11 14 o-K August 1986 57 Close look circuit board shows component locations arrangement wiring Note mixture bare insulated wire works fine leads dressed shown 0 0 0 0 C 0 0 0 0 C C 0 0 COMMANOO FOR h/ TEXACO B-70 FREEFLIGHT TAUBE 1/2A RC POTENT 30 lightweight Past Duilding P-SO Pro-Rolled Motor Tube Tisaus Prop Machine Cut Ribs Rubber included Only $1295 0 0 0 0 0 0 0 S 0 0 0 0 $2595 0 1795 2250 0 0 0 S 0 0 0 0 Sitd SASE Par Urochure Add $300 Sllppdng Hafldtlng COD Add $200 Caild Am Add 6% Tax Meeter Card & Visa 116 065-3669 Sat & Sun Phauts Models PO Sax 604 Poleomn CA 96630 0 oeooooOOOeeooe..o Now know take great skill autorotate machine prescribed pad altitude motor out experience has also shown experience engine failure hover drag tail rotor grass damage machine always less freewheel device fitted reason believe mandatory model Helicopter fitted autorotation regardless fliers skill level common crashes beginner occurs has started hovering model turns its nose towards him slightly flier becomes confused former fixed-wing pilot invariably gives Up elevator panic Helicopter promptly backs up drags its tail rotor ground model has autorotation main rotor simply runs away problem usually doesnt stress tall rotor gear box tear teeth out main reduction gear thinking purchasing model Helicopter can afford extra cost autorotation means get think will save time money long run BCNU Larry Jolly 5501 W Coma Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 55 ie separate channel motor cutoff RACE PROCEDURES/SCORING As speci fied current rules Formula except course length shall follow QM Short Course layout 1705 miles 10 laps race shall started simultaneous hand-launch NOTE six-cell 72 V motor battery size selected permit fast charging 12 V source However goal standardize seven cells 84 V similar events flown other regions country six-cell battery tends equalize performance differences tween various motors also RECOMMENDED EQUIPMENT Aircraft kits Barbarian Hummingbird JM Glascraft Lightning Electric Motor Design Fast Eddy Hobby Horn Wasp Leisure Elec tronics Ohm-My-Gosh Model Builder p1 ans Motors Challenger 05 Super Ferrite 05 Astro Flight LT5O Competition Wind Lei sure Electronics Batteries Sanyo SR rules specifically drafted permit wide variety motors aircraft types flown resultant response event entries will determine final version Kindly take few minutes read over rules submit comments Remember first cut subject change depending comments Dont forget years Nats Lake Charles LA past has perfect site Next month Ill have some helpful tips improve flying See Bill Hager 706 Glen Haven Dr Conroe TX 77385 SARPI/Powel Continued page 57 earphone method can also serve quick reference check system operation after hard-landing incident crash does check servos themselves quickly tested normal stickwaggling inspection sharing flying site other fliers using adjacent RC channels helpful have non-destructive means checking systems sensitivity inter ference Using servos output indi cator can exciting interference pulses received since spurious commands can spin servos wrap pushrods linkages spaghetti safer technique disconnect servos use SARPI instead can experiment freely listening different distances other fliersand transmitter off antenna down up etc no damage can occur equip ment Interference will change steady buzz syncopated beat some static noise may heard Construction circuit requires minimum components can found Radio Shack stores except servo lead must obtained RC dealer Since us equipped make PC boards have shown circuit wired small IC matrix board ease assembly links possible made bare solid wire Note wires must positioned shown pictorial avoid shorts obtained small-gauge bare wire stripping some heavy stranded hookup wire using individual strands Layout criticalexcept avoiding shorts solder bridges components mounted silkscreened face board copper use IC socket observe polarity 10 mfd capacitor IC must inserted its socket correct orientation wiring socket put dab paint marker adjacent Pin 1 both sides board later reference Care must taken establish identity servo leads receiver Although probably worst will hap pen reversed connector wiring loss 4049 4050 IC circuit certainly wont work either sets servo leads color-coded red V black V some other color signal lead battery connector lead similar servo leads try checking battery wiring voltmeter find pin nection World Engines Airtronics leads shown Fig 2 FIG 2 Sq No d Eng ne Sq Aon TYPICAL SERVO PLUG LEADS construction sequence 1 Epoxy -in earphone socket top surface 148 Model Aviation MASTER AIRSCREW ~RAIRSC REW 12x8 Folder1195 15x12 Folder..1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 0 0 0 0 0 0 0 0 0 0 ZO NA SAWS famous line hobby aews Razor #200 Universal #500 P0 Box 3967 Torrance CA 90610 Replacement Blades available dealer FAIModei Supply U GRAPHICS STRIPING TAPE 60 feet3 sizes thein price ofpackage 36 -4---- /16 OETE 420 BbyIon Road Hoshzn, PA Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices 904 478-6745 RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft II Line EhIEI Futabe 43 West Nine Mile Rd Pensacola FL 32514 mm- K * Sales ServiceDealer Inquiries Welcome * board position shown also soldered retaining wire over jack 2 Solder IC socket Mark Pin 1 both surfaces 3 Install resistor tan talum capacitor capacitor must oriented shown 4 Install bare wire links dress neatly 5 Make remaining connections insulated wire 6 Attach servo lead appropriate pads Put IC its socket Carefully check wiring against pictorial schematic before plugging circuit receiver well plug earphone plug SARPI servo socket receiver Switch system transmitter steady loud buzz should heard transmitter off should no sound Note some FM receivers normal hear occasional single clicks transmitter off receiver picks up random noise Parts list Radio Shack catalog num bers Multipurpose bus board 276-150 @ 79 ea Type 4049 4050 CMOS hex buffer IC 276-2449 @ $119 ea 16-pin DIP socket 276-1998 @ 89/2 Enclosed -injack socket 274-297 @ $11 9/2 100ohm W resistor 271-012 @ 19/3 10 mfd tantalum capacitor 272-1436 @ 69 ea Mono earphone -in plug 33-175 @ $149 ea Servo lead suit RC system Hookup wire small-gauge solid eg 26 30 bare insulated FF Duration/Murphy Continued page 61 Aerospace Composite Products 28 Crosswood Road Farmington CT 06032 final item subject photo picked up Toledo sent Ken Curtis Curtis Model Products 10105 Hamil ton Hills Lane Indianapolis IN 46250 Kens new hand-launched glider kit calls Thermalier spans 18 has wing area 56 sq Ken admits design influenced once-popular Eaglet Kens variation has D-T system fuselage nose design improves rollout transition top climb kit contains excellent materials includ ing balsa hardwood parts clay D-T line get penny backit has dual use nose weight D-T function hobby shop cannot supply needs send $595 kit include extra dollar postage packing above ad dress Ken will gladly send Therma 11cr Youll get money s worthplus penny back Newsletter Month Since have expounded finalization designeligibility list Nostalgia Gas events issue thought would opportune proper honor club newsletter its editor originally initiated events Satellite newsletter San Valeers its capable editor Ralph Prey San Valeers current president Terry Thor kildsen vice-president Ed Hopkins Mike Myers handles club monies Ralph gets paperwork secretary newsletter editor Satellite newsletter certainly no newcomer competition Free Flighters its mimeographed sheets have relayed news views contest notices contest results four corners Free Flight years Seldom issue does contain least building engine tip Free Flight controversy brew ing somewhere can depend Satellite defend Southern California fliers posi tion fine publication great tradi tion Should wish begin receiving Satellite send $5 covers 12 issues Ralph Prey 4859 W 97th Street Inglewood CA 90301 Camera timers inexpensive reliable K-Mart camera timers back ever gone least absent area about three years Anyway Continued page 152 1- ROLLED PLANS Ui1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 BC D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifiersea 50 Surgical Tubing1 Oft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX 0O 6 August 1986 149 II'I PROPASSEMBLY #109-ELECTRIC ONLY PROP HUB ASSEMBLY #1GM 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #lOUA Available 7x 25 7x 3 7x 35 Bs 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 Available Ix 3 $400 per blade $800 per pair PROPHUBASSEMBLY# 111 For2540 engines electric motor equivalent 20 grams $2000 PROP BLADES FOR HUB # 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line
Edition: Model Aviation - 1986/08
Page Numbers: 56, 57, 148, 149
uur author uses SARPI range-check Astro Hog transmitter remains flight box no helper required forthe test SINCE THE DAYS crystal sets has known best way tell radio receiver works properly listen profound notion came after several years frustrating attempts tune range-check RC receivers using recommended methods range-checking receiver may walk away model waggling control surface rudder instance keep going until control following transmitter accurately n see well Alternatively can hold model leaving transmitter behind helper occasionally waggles sticks can watch servo response closely listen jit tering will easy either techniques tell sure what working range system servos designed give us information circuit shown simply CMOS current amplifier can plugged free receiver servo output output amplifier drives tran sistor-radio-type earphone used listen servo pulses received transmitter pulses sound like continuous buzz about 50 Hz see Fig 1 buzz present system SARPI* receiving OK buzz stops sounds intermittent system re ceiving corredtly Its simple method works well because ear very sensitive change sound pattern single missed pulse clearly audible purpose doing regular range checks catch unsuspected system faults before aircraft flown first time day Once have established normal antenna-down Test Range particular system can easily spot incipient disaster model safely ground example day find can get steady signal within about 30 paces transmitter normally go 50 paces can sure something seriously wrong faults have found range drops like usually involve 1 under charged batteries battery bad *Simple Auditory Receiver Performance Indicator 56 Model Aviation Hooked up ready use SARPI plugged aileron lead earphone plugs pilot Its inexpensive easy build requires no power its own yet provides simple high ly accu rate way determine radios range detect range has changed An easy one-evening proj-0 ect circuito -0 101 IlI alsoletsyousee hear re- S19nal~jjjJ er rejectingBat161514131211109000 4049 signals \Zr00 unwantedcap fdfl1/8 Jack EJohn W PowellBatO~jfiI0 000 PICTORIAL cell 2 poor contact frayed wire solder joint receiver battery con nector 3 damaged crystal 4 dis connected poorly-deployed antennas Transmitter antennas have habit com ing unscrewed bases some times wire link antenna transmitter circuit board gets broken off Receiver antenna wires supposed stretched out say inside Sailplane fuselage come adrift present much less full length RF signal problems often can something about field saving airplane days flying Another possibility although no sudden change Test Range appears system just good new last season probably indicates need align FIG1 H20 ms Typical SIGNAL AT SERVO OUTPUT ment returning system manufacturer repair agency should come up very often helpful have performance baseline equip ment can recognize longterm drop efficiency range-checking flying field get frequency pin plug amplifier INSULATED WIRE BARE WIRE receiver turn transmitter antenna down leave sitting flight box No helper needed walk away listening first pulse dropouts short servo extension lead can left plugged receiver model convenience aileronequipped model fly lead servo can used test range system maximum distance pulse buzz uninterrupted no matter orient model transmitter find some occasional pulse SCHEMATIC Servo Signal Battery N 1/8 Earphone Jack mfd r1 riri Al Pin 1 V5 Pin 8 100 A vvv 0 dropouts occur close range de pending angle receiver antenna whether body some other bulky object gets between transmitter receiver AM sets seem have shorter antenna-down test range FM sets have tried though cannot infer FM sets have greater operating rangeContinued page 148 4049 12 15 4 2 010 11 14 o-K August 1986 57 Close look circuit board shows component locations arrangement wiring Note mixture bare insulated wire works fine leads dressed shown 0 0 0 0 C 0 0 0 0 C C 0 0 COMMANOO FOR h/ TEXACO B-70 FREEFLIGHT TAUBE 1/2A RC POTENT 30 lightweight Past Duilding P-SO Pro-Rolled Motor Tube Tisaus Prop Machine Cut Ribs Rubber included Only $1295 0 0 0 0 0 0 0 S 0 0 0 0 $2595 0 1795 2250 0 0 0 S 0 0 0 0 Sitd SASE Par Urochure Add $300 Sllppdng Hafldtlng COD Add $200 Caild Am Add 6% Tax Meeter Card & Visa 116 065-3669 Sat & Sun Phauts Models PO Sax 604 Poleomn CA 96630 0 oeooooOOOeeooe..o Now know take great skill autorotate machine prescribed pad altitude motor out experience has also shown experience engine failure hover drag tail rotor grass damage machine always less freewheel device fitted reason believe mandatory model Helicopter fitted autorotation regardless fliers skill level common crashes beginner occurs has started hovering model turns its nose towards him slightly flier becomes confused former fixed-wing pilot invariably gives Up elevator panic Helicopter promptly backs up drags its tail rotor ground model has autorotation main rotor simply runs away problem usually doesnt stress tall rotor gear box tear teeth out main reduction gear thinking purchasing model Helicopter can afford extra cost autorotation means get think will save time money long run BCNU Larry Jolly 5501 W Coma Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 55 ie separate channel motor cutoff RACE PROCEDURES/SCORING As speci fied current rules Formula except course length shall follow QM Short Course layout 1705 miles 10 laps race shall started simultaneous hand-launch NOTE six-cell 72 V motor battery size selected permit fast charging 12 V source However goal standardize seven cells 84 V similar events flown other regions country six-cell battery tends equalize performance differences tween various motors also RECOMMENDED EQUIPMENT Aircraft kits Barbarian Hummingbird JM Glascraft Lightning Electric Motor Design Fast Eddy Hobby Horn Wasp Leisure Elec tronics Ohm-My-Gosh Model Builder p1 ans Motors Challenger 05 Super Ferrite 05 Astro Flight LT5O Competition Wind Lei sure Electronics Batteries Sanyo SR rules specifically drafted permit wide variety motors aircraft types flown resultant response event entries will determine final version Kindly take few minutes read over rules submit comments Remember first cut subject change depending comments Dont forget years Nats Lake Charles LA past has perfect site Next month Ill have some helpful tips improve flying See Bill Hager 706 Glen Haven Dr Conroe TX 77385 SARPI/Powel Continued page 57 earphone method can also serve quick reference check system operation after hard-landing incident crash does check servos themselves quickly tested normal stickwaggling inspection sharing flying site other fliers using adjacent RC channels helpful have non-destructive means checking systems sensitivity inter ference Using servos output indi cator can exciting interference pulses received since spurious commands can spin servos wrap pushrods linkages spaghetti safer technique disconnect servos use SARPI instead can experiment freely listening different distances other fliersand transmitter off antenna down up etc no damage can occur equip ment Interference will change steady buzz syncopated beat some static noise may heard Construction circuit requires minimum components can found Radio Shack stores except servo lead must obtained RC dealer Since us equipped make PC boards have shown circuit wired small IC matrix board ease assembly links possible made bare solid wire Note wires must positioned shown pictorial avoid shorts obtained small-gauge bare wire stripping some heavy stranded hookup wire using individual strands Layout criticalexcept avoiding shorts solder bridges components mounted silkscreened face board copper use IC socket observe polarity 10 mfd capacitor IC must inserted its socket correct orientation wiring socket put dab paint marker adjacent Pin 1 both sides board later reference Care must taken establish identity servo leads receiver Although probably worst will hap pen reversed connector wiring loss 4049 4050 IC circuit certainly wont work either sets servo leads color-coded red V black V some other color signal lead battery connector lead similar servo leads try checking battery wiring voltmeter find pin nection World Engines Airtronics leads shown Fig 2 FIG 2 Sq No d Eng ne Sq Aon TYPICAL SERVO PLUG LEADS construction sequence 1 Epoxy -in earphone socket top surface 148 Model Aviation MASTER AIRSCREW ~RAIRSC REW 12x8 Folder1195 15x12 Folder..1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 0 0 0 0 0 0 0 0 0 0 ZO NA SAWS famous line hobby aews Razor #200 Universal #500 P0 Box 3967 Torrance CA 90610 Replacement Blades available dealer FAIModei Supply U GRAPHICS STRIPING TAPE 60 feet3 sizes thein price ofpackage 36 -4---- /16 OETE 420 BbyIon Road Hoshzn, PA Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices 904 478-6745 RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft II Line EhIEI Futabe 43 West Nine Mile Rd Pensacola FL 32514 mm- K * Sales ServiceDealer Inquiries Welcome * board position shown also soldered retaining wire over jack 2 Solder IC socket Mark Pin 1 both surfaces 3 Install resistor tan talum capacitor capacitor must oriented shown 4 Install bare wire links dress neatly 5 Make remaining connections insulated wire 6 Attach servo lead appropriate pads Put IC its socket Carefully check wiring against pictorial schematic before plugging circuit receiver well plug earphone plug SARPI servo socket receiver Switch system transmitter steady loud buzz should heard transmitter off should no sound Note some FM receivers normal hear occasional single clicks transmitter off receiver picks up random noise Parts list Radio Shack catalog num bers Multipurpose bus board 276-150 @ 79 ea Type 4049 4050 CMOS hex buffer IC 276-2449 @ $119 ea 16-pin DIP socket 276-1998 @ 89/2 Enclosed -injack socket 274-297 @ $11 9/2 100ohm W resistor 271-012 @ 19/3 10 mfd tantalum capacitor 272-1436 @ 69 ea Mono earphone -in plug 33-175 @ $149 ea Servo lead suit RC system Hookup wire small-gauge solid eg 26 30 bare insulated FF Duration/Murphy Continued page 61 Aerospace Composite Products 28 Crosswood Road Farmington CT 06032 final item subject photo picked up Toledo sent Ken Curtis Curtis Model Products 10105 Hamil ton Hills Lane Indianapolis IN 46250 Kens new hand-launched glider kit calls Thermalier spans 18 has wing area 56 sq Ken admits design influenced once-popular Eaglet Kens variation has D-T system fuselage nose design improves rollout transition top climb kit contains excellent materials includ ing balsa hardwood parts clay D-T line get penny backit has dual use nose weight D-T function hobby shop cannot supply needs send $595 kit include extra dollar postage packing above ad dress Ken will gladly send Therma 11cr Youll get money s worthplus penny back Newsletter Month Since have expounded finalization designeligibility list Nostalgia Gas events issue thought would opportune proper honor club newsletter its editor originally initiated events Satellite newsletter San Valeers its capable editor Ralph Prey San Valeers current president Terry Thor kildsen vice-president Ed Hopkins Mike Myers handles club monies Ralph gets paperwork secretary newsletter editor Satellite newsletter certainly no newcomer competition Free Flighters its mimeographed sheets have relayed news views contest notices contest results four corners Free Flight years Seldom issue does contain least building engine tip Free Flight controversy brew ing somewhere can depend Satellite defend Southern California fliers posi tion fine publication great tradi tion Should wish begin receiving Satellite send $5 covers 12 issues Ralph Prey 4859 W 97th Street Inglewood CA 90301 Camera timers inexpensive reliable K-Mart camera timers back ever gone least absent area about three years Anyway Continued page 152 1- ROLLED PLANS Ui1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 BC D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifiersea 50 Surgical Tubing1 Oft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX 0O 6 August 1986 149 II'I PROPASSEMBLY #109-ELECTRIC ONLY PROP HUB ASSEMBLY #1GM 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #lOUA Available 7x 25 7x 3 7x 35 Bs 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 Available Ix 3 $400 per blade $800 per pair PROPHUBASSEMBLY# 111 For2540 engines electric motor equivalent 20 grams $2000 PROP BLADES FOR HUB # 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line
Edition: Model Aviation - 1986/08
Page Numbers: 56, 57, 148, 149
uur author uses SARPI range-check Astro Hog transmitter remains flight box no helper required forthe test SINCE THE DAYS crystal sets has known best way tell radio receiver works properly listen profound notion came after several years frustrating attempts tune range-check RC receivers using recommended methods range-checking receiver may walk away model waggling control surface rudder instance keep going until control following transmitter accurately n see well Alternatively can hold model leaving transmitter behind helper occasionally waggles sticks can watch servo response closely listen jit tering will easy either techniques tell sure what working range system servos designed give us information circuit shown simply CMOS current amplifier can plugged free receiver servo output output amplifier drives tran sistor-radio-type earphone used listen servo pulses received transmitter pulses sound like continuous buzz about 50 Hz see Fig 1 buzz present system SARPI* receiving OK buzz stops sounds intermittent system re ceiving corredtly Its simple method works well because ear very sensitive change sound pattern single missed pulse clearly audible purpose doing regular range checks catch unsuspected system faults before aircraft flown first time day Once have established normal antenna-down Test Range particular system can easily spot incipient disaster model safely ground example day find can get steady signal within about 30 paces transmitter normally go 50 paces can sure something seriously wrong faults have found range drops like usually involve 1 under charged batteries battery bad *Simple Auditory Receiver Performance Indicator 56 Model Aviation Hooked up ready use SARPI plugged aileron lead earphone plugs pilot Its inexpensive easy build requires no power its own yet provides simple high ly accu rate way determine radios range detect range has changed An easy one-evening proj-0 ect circuito -0 101 IlI alsoletsyousee hear re- S19nal~jjjJ er rejectingBat161514131211109000 4049 signals \Zr00 unwantedcap fdfl1/8 Jack EJohn W PowellBatO~jfiI0 000 PICTORIAL cell 2 poor contact frayed wire solder joint receiver battery con nector 3 damaged crystal 4 dis connected poorly-deployed antennas Transmitter antennas have habit com ing unscrewed bases some times wire link antenna transmitter circuit board gets broken off Receiver antenna wires supposed stretched out say inside Sailplane fuselage come adrift present much less full length RF signal problems often can something about field saving airplane days flying Another possibility although no sudden change Test Range appears system just good new last season probably indicates need align FIG1 H20 ms Typical SIGNAL AT SERVO OUTPUT ment returning system manufacturer repair agency should come up very often helpful have performance baseline equip ment can recognize longterm drop efficiency range-checking flying field get frequency pin plug amplifier INSULATED WIRE BARE WIRE receiver turn transmitter antenna down leave sitting flight box No helper needed walk away listening first pulse dropouts short servo extension lead can left plugged receiver model convenience aileronequipped model fly lead servo can used test range system maximum distance pulse buzz uninterrupted no matter orient model transmitter find some occasional pulse SCHEMATIC Servo Signal Battery N 1/8 Earphone Jack mfd r1 riri Al Pin 1 V5 Pin 8 100 A vvv 0 dropouts occur close range de pending angle receiver antenna whether body some other bulky object gets between transmitter receiver AM sets seem have shorter antenna-down test range FM sets have tried though cannot infer FM sets have greater operating rangeContinued page 148 4049 12 15 4 2 010 11 14 o-K August 1986 57 Close look circuit board shows component locations arrangement wiring Note mixture bare insulated wire works fine leads dressed shown 0 0 0 0 C 0 0 0 0 C C 0 0 COMMANOO FOR h/ TEXACO B-70 FREEFLIGHT TAUBE 1/2A RC POTENT 30 lightweight Past Duilding P-SO Pro-Rolled Motor Tube Tisaus Prop Machine Cut Ribs Rubber included Only $1295 0 0 0 0 0 0 0 S 0 0 0 0 $2595 0 1795 2250 0 0 0 S 0 0 0 0 Sitd SASE Par Urochure Add $300 Sllppdng Hafldtlng COD Add $200 Caild Am Add 6% Tax Meeter Card & Visa 116 065-3669 Sat & Sun Phauts Models PO Sax 604 Poleomn CA 96630 0 oeooooOOOeeooe..o Now know take great skill autorotate machine prescribed pad altitude motor out experience has also shown experience engine failure hover drag tail rotor grass damage machine always less freewheel device fitted reason believe mandatory model Helicopter fitted autorotation regardless fliers skill level common crashes beginner occurs has started hovering model turns its nose towards him slightly flier becomes confused former fixed-wing pilot invariably gives Up elevator panic Helicopter promptly backs up drags its tail rotor ground model has autorotation main rotor simply runs away problem usually doesnt stress tall rotor gear box tear teeth out main reduction gear thinking purchasing model Helicopter can afford extra cost autorotation means get think will save time money long run BCNU Larry Jolly 5501 W Coma Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 55 ie separate channel motor cutoff RACE PROCEDURES/SCORING As speci fied current rules Formula except course length shall follow QM Short Course layout 1705 miles 10 laps race shall started simultaneous hand-launch NOTE six-cell 72 V motor battery size selected permit fast charging 12 V source However goal standardize seven cells 84 V similar events flown other regions country six-cell battery tends equalize performance differences tween various motors also RECOMMENDED EQUIPMENT Aircraft kits Barbarian Hummingbird JM Glascraft Lightning Electric Motor Design Fast Eddy Hobby Horn Wasp Leisure Elec tronics Ohm-My-Gosh Model Builder p1 ans Motors Challenger 05 Super Ferrite 05 Astro Flight LT5O Competition Wind Lei sure Electronics Batteries Sanyo SR rules specifically drafted permit wide variety motors aircraft types flown resultant response event entries will determine final version Kindly take few minutes read over rules submit comments Remember first cut subject change depending comments Dont forget years Nats Lake Charles LA past has perfect site Next month Ill have some helpful tips improve flying See Bill Hager 706 Glen Haven Dr Conroe TX 77385 SARPI/Powel Continued page 57 earphone method can also serve quick reference check system operation after hard-landing incident crash does check servos themselves quickly tested normal stickwaggling inspection sharing flying site other fliers using adjacent RC channels helpful have non-destructive means checking systems sensitivity inter ference Using servos output indi cator can exciting interference pulses received since spurious commands can spin servos wrap pushrods linkages spaghetti safer technique disconnect servos use SARPI instead can experiment freely listening different distances other fliersand transmitter off antenna down up etc no damage can occur equip ment Interference will change steady buzz syncopated beat some static noise may heard Construction circuit requires minimum components can found Radio Shack stores except servo lead must obtained RC dealer Since us equipped make PC boards have shown circuit wired small IC matrix board ease assembly links possible made bare solid wire Note wires must positioned shown pictorial avoid shorts obtained small-gauge bare wire stripping some heavy stranded hookup wire using individual strands Layout criticalexcept avoiding shorts solder bridges components mounted silkscreened face board copper use IC socket observe polarity 10 mfd capacitor IC must inserted its socket correct orientation wiring socket put dab paint marker adjacent Pin 1 both sides board later reference Care must taken establish identity servo leads receiver Although probably worst will hap pen reversed connector wiring loss 4049 4050 IC circuit certainly wont work either sets servo leads color-coded red V black V some other color signal lead battery connector lead similar servo leads try checking battery wiring voltmeter find pin nection World Engines Airtronics leads shown Fig 2 FIG 2 Sq No d Eng ne Sq Aon TYPICAL SERVO PLUG LEADS construction sequence 1 Epoxy -in earphone socket top surface 148 Model Aviation MASTER AIRSCREW ~RAIRSC REW 12x8 Folder1195 15x12 Folder..1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 0 0 0 0 0 0 0 0 0 0 ZO NA SAWS famous line hobby aews Razor #200 Universal #500 P0 Box 3967 Torrance CA 90610 Replacement Blades available dealer FAIModei Supply U GRAPHICS STRIPING TAPE 60 feet3 sizes thein price ofpackage 36 -4---- /16 OETE 420 BbyIon Road Hoshzn, PA Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices 904 478-6745 RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft II Line EhIEI Futabe 43 West Nine Mile Rd Pensacola FL 32514 mm- K * Sales ServiceDealer Inquiries Welcome * board position shown also soldered retaining wire over jack 2 Solder IC socket Mark Pin 1 both surfaces 3 Install resistor tan talum capacitor capacitor must oriented shown 4 Install bare wire links dress neatly 5 Make remaining connections insulated wire 6 Attach servo lead appropriate pads Put IC its socket Carefully check wiring against pictorial schematic before plugging circuit receiver well plug earphone plug SARPI servo socket receiver Switch system transmitter steady loud buzz should heard transmitter off should no sound Note some FM receivers normal hear occasional single clicks transmitter off receiver picks up random noise Parts list Radio Shack catalog num bers Multipurpose bus board 276-150 @ 79 ea Type 4049 4050 CMOS hex buffer IC 276-2449 @ $119 ea 16-pin DIP socket 276-1998 @ 89/2 Enclosed -injack socket 274-297 @ $11 9/2 100ohm W resistor 271-012 @ 19/3 10 mfd tantalum capacitor 272-1436 @ 69 ea Mono earphone -in plug 33-175 @ $149 ea Servo lead suit RC system Hookup wire small-gauge solid eg 26 30 bare insulated FF Duration/Murphy Continued page 61 Aerospace Composite Products 28 Crosswood Road Farmington CT 06032 final item subject photo picked up Toledo sent Ken Curtis Curtis Model Products 10105 Hamil ton Hills Lane Indianapolis IN 46250 Kens new hand-launched glider kit calls Thermalier spans 18 has wing area 56 sq Ken admits design influenced once-popular Eaglet Kens variation has D-T system fuselage nose design improves rollout transition top climb kit contains excellent materials includ ing balsa hardwood parts clay D-T line get penny backit has dual use nose weight D-T function hobby shop cannot supply needs send $595 kit include extra dollar postage packing above ad dress Ken will gladly send Therma 11cr Youll get money s worthplus penny back Newsletter Month Since have expounded finalization designeligibility list Nostalgia Gas events issue thought would opportune proper honor club newsletter its editor originally initiated events Satellite newsletter San Valeers its capable editor Ralph Prey San Valeers current president Terry Thor kildsen vice-president Ed Hopkins Mike Myers handles club monies Ralph gets paperwork secretary newsletter editor Satellite newsletter certainly no newcomer competition Free Flighters its mimeographed sheets have relayed news views contest notices contest results four corners Free Flight years Seldom issue does contain least building engine tip Free Flight controversy brew ing somewhere can depend Satellite defend Southern California fliers posi tion fine publication great tradi tion Should wish begin receiving Satellite send $5 covers 12 issues Ralph Prey 4859 W 97th Street Inglewood CA 90301 Camera timers inexpensive reliable K-Mart camera timers back ever gone least absent area about three years Anyway Continued page 152 1- ROLLED PLANS Ui1/2A FULL KIT $2795 y A-B FULL KIT3995 B-C-D PRO KIT4495 BC D FULL KIT5995 Tee Dee Back Plate Mount 500 Pacifiersea 50 Surgical Tubing1 Oft 300 Shipping $250 ea order Shipping paid orders over $6000 PRE-PAY OR COD/CA RES ADD 6-1/2% TAX 0O 6 August 1986 149 II'I PROPASSEMBLY #109-ELECTRIC ONLY PROP HUB ASSEMBLY #1GM 15 21 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB #lOUA Available 7x 25 7x 3 7x 35 Bs 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 Available Ix 3 $400 per blade $800 per pair PROPHUBASSEMBLY# 111 For2540 engines electric motor equivalent 20 grams $2000 PROP BLADES FOR HUB # 111 lable 9 x 4 lOx 4 lix 4 $500 per blade $1000 per pair Send SSAE catalog sheet complete line