G eorg eM Myers WHAT new radio should buy half letters readers month have asked same question What RC system can buyright nowthat will usable 1991 beyond possible answer want general-purpose airplane-only RC sys tem buy Futaba Conquest PCM system channel RC 12 Now did pick particular system channel tests Aberle Myers Steiner have shown good low-to-medium-priced system includes narrow-band receiver well narrow-band transmitter provides usual functions including servo reversing plus good built-in failsafe RC 12 usable right now either wideband narrow-band equipment will continue usable narrow-band systems beyond 1991 assuming have either dual-conversion receiver single-conversion receiver its local oscillator 7 1575 MHz What should buy difficult question answer cant guess needs dont know whether want buy best-performing low-priced system lowest-priced system P maxl 1991 performance dont know cpnsidering cheap wideband system ant narrow-band system impressive assembly chrome-plated knobs levers Perhaps want Helicopter radio Helicopter radio provides control func tions beginner needs Sailplanes powered sport models can also fly Helicopter basic two-stick 4/5 /6-channel airplane sys tem like Conquest PCM mentioned mo ment ago isnt suitable Helicopter know Should recommend system uses interchangeable crystals doesnt need big servos because intend fly Quarter Scale need oversize batteries because way LSF level V lot factors consider choice comes down old-design wideband system can get low price because dealer clearing Out inventory versus new-design expensive narrowband system have think terms much use will put An old wideband system will still acceptable AMA RC competition RC 12 38 40 42444648 50 52 54 56 until January 1 1991 Depending whether FCC chooses modify Part 95 its regulations match AMA Guidelines may/may usable legal system after 1991 turns out wideband systems arent legal after 1991 may still possible replace receiver narrow-band receiver retrofit transmitter narrow-band RE module thereby making legal after 1991 Either way can count least four years useful service An RC system has worked hard four years should need extensive service Four years long time Ni-Cd battery pack average 100 charges per year Four years servo wear can easily beat up servo motors 38 Model Aviation Dian five 35 planes use anyone walk out na RC sure thin ng wise channel complywith ssriction number sal he/she onn turi nitter start Fit Sta BK/mN WH/O iO FIt Sta B BK/RED Fit Sta C 4 BK/OR BK/BLI 52 Fit Sta Fit Sta E GRN WH/BN* RC54 together ER PacIfIc separations si ca B BK/RED BK/YEL LU WH/RED WH/VIO RC1 2* RC4O RC44 RC5O gether RU ILl w U 0 xx-4 xx TWO PILOTSTWO PILO Pacific Pian fortwo fiight stations aiiows maximum four pianos air anytwo Fit Sta anytwofrom Fit Sta B itoan expanded up five fiight stationsbut 60-ft separation between fiight stations must observed feedback potentiometers bill replacing Ni-Cds servos can easily exceed price new system prompts say Buy closeout expect work hard next few years arent particularly worried about losing plane some kind interference Beyond can say AMA HQ might build file radio system acceptances Continued page 146 want create FSGAME version 13 modifying copy version 10 proceed follows 40 Var 13 replaces Ver 10 replace existing lines 250 260 250 IF Z$ V OR ZSN THEN 260 ELSE 270 260 IF ZSY THEN 1870 ELSE 280 lines added 611 IF YR1987 AND F9 THEN 614 612 IF YR1988 AND F12 THEN 614 613 IF YR1991 AND F36 THEN 614 614 PRINT NO CAN DO PRINT CHR$171 616 GOTO 600 715 IF LTI585 OR L1585 THEN 720 ELSE 740 1165 IF LT58SOR LSl585 THEN 1170 ELSE 1190 1391 IF JF THEN 1392 ELSE 930 1392 FOR J1 TO F LOOKING FOR STORED ZEROS IN FIRST ROW 1393 IF LJI0 THEN 1396 1394 PRINT":NEXTJ 1395 GOTO 930 1396 PRINT TAB40 CAN DO PRINT CHRS71GOTO 1800 1480 GOTO 940 1495 IF JF THEN TT1GOTO 940 1575 PRINTREJNlREJNI 1805 IF WSY OR WS N THEN 1810 ELSE 1800 1992 IF CTR7 THEN 1994 ELSE 2000 1994 PRINT CHRS131CTRO 2095 LJ0N EXT J CLEANS OUT LJI ARRAY lines revised shown 280 delete DIM REJ201 290 DIM R601DIM REJ20N1 I0Z0P0 610 IF F1 OR FQ THEN 614 710 IF ABSLTIL1l44 THEN 715 ELSE 740 860 IF ABSLTLI)1 . 890 PRINT LTI10 KHZ OR 20 KHZ ADJ CH GOTO 900 1110 TEST replaces INTl 1120 IF ABSLTLSII1 OR AESLTILIJII1 . 1130 add OR BLSJ1W OR BL$lSW 1380 delete REFO 1390 add IF TF THEN 1392 ELSE 1400 1430 PRINTL4T 100R2OKHZADJCHGOTO 1450 1460 add 101 MEANS START REVIEWING REJECTS 1470 delete REFO 1500 FOR HJFI1 TO JPRINTLH1LH 1530 add COLUMNS HAVE BEEN TRIED 1540 PRINT:NEXTH 1550 change Z0 1570 delete Z1 1580 Z0NN1TT1 FGOTO 940 1690 IFJTTHEN 1710 1740 delete whole line 1750 FOR N1 TO N 1760 IF REJNOTHEN 1770 ELSE PRINTREJINI 1795 PRINT CHR$7 2040 add CLEANS REJECTS OUT OF DATA ARRAY 2060 add RESETS R FOR NEXT TRIAL 2080 REJN10NEXT N CLEANS OUT REJECT ARRAY 2090 FOR J1 TO 89 2540 add T51 2590 insert PRINT CHRSI7 - end * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202Air Cleaner Fine$225 Replacement Inserts Cat No104 Pk/2 InsertsCoarse$195 Cat No204 Pk/2 Inserts Fine$195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBYDEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 WV OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER TATONE 30-13 Use TATON ES ALUM MOTOR MOUNT THRUST TESTER determine maximum engine outpul using different 0 props fuel mixtures RPM levels ENGINE i THROTTLE CONTROL SAFETY STARTING LOCK flhck engine DIRECT READING - orTHRUST DIAL 1987 SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! FREE FUGHT K&B CUSTOMIZED ENGINES ALSO COMPLETE LINE OF U/C & R/C RACING PARTS SOLID UNES RACING WHEELS QUICK FILLS AND MORE.. WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. AJ iNTERCEPTOR4e9S compiete U-build Kit photos easy instructions NOTEPLE*SEAOO 5300 O P00*0f S DANOCING nESt 00E URUILD OES ADO TEN PERCENT OP PEICE POD EACA ADbrtIONAL ~CRAFT COMPANY RO Box 68132 Portland OR 97268 1000/0 Satisfaction Ouaraneea Money Back SEND 450 per 5/8 ID Coupler or550per3/4ID DANA AEROSPACE CORP 1110 E 5th St rior WI 54880 OLD TIMER SUPPLIES ORDER DY MAIL OR PHONE 714 830-5162 SOAR V NO COD VISA MASTERCARD WELCOME DEALER INQUIRIES INVITED ALL PRICES POSTPAID MINIMUM ORDER *1000 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HAS EAI R~ifl#MT0 Aflfl * TA V Meanwhile out California Owen Black has working out Pacific Plan flight stations very clever Pacific Plan takes middle element possible 31M triplet puts flight station Next two outside elements placed another flight station must least 60 ft flight station containing middle element way two elements must work together create 31M physically separated enough distance 31M manage produce weak cant detected RC receiver Flight Station Game differs Pacific Plan matter intrinsic assump tions Flight Station Game algorithm based assumption fliers will eventually stand shoulder-to-shoulder ignoring AMA recommendation 25-ft spacing maintained between flight stations flight station assignments developed Flight Station Game will protect individual fliers modeler-to-modeler interference stand shoulder-to-shoulder Pacific Plan assumes required 60ft separation flight stations will main tained fliers move together some reason flight station assignments developed Pacific Plan will protect modeler-to-modeler interference Pacific Plan arranged channel assignments also avoid 20P second order product image adjacent-channel problems Owens schemes easier sell group because use RC channel no rejects Tests George P Steiner using spectrum analyzer confirm validity Owens scheme Now didnt think Flight Station Game published February 1987 issue Model Aviation permits enter examine particular arrangements RC channels used club members also provides generalized solutions 1987 1988 1991 1995 situations because built program demonstrations Version 10 tried put equal numbers RC channels flight station contained bug have killed bug made other changes now offer version 13 tries maximize number channels used automatically makes assignments flight stations unequal want version 13 now available AMA HQ 525-in SSDD disks format ted MSDOS 2x MSDOS 3x Just send check $20 payable AMA Mortgage Retirement Fund state preference special order can produce single-sided 48 tpi formats Access CCS Cromenco IBM Kaypro Lobo Memotech Radio Shack LV Morrow NEC PC Omikron Osborne Superbrain Seequa DEC VT-80 Xerox Zenith Z-100 use Mycroft Labs Inc COMPAT v32 interested having such direct disk-interchange utility yourself contact Mycroft Labs PO Box 6045 Talla hassee FL 32314 want create version 13 ofFSGAME modifying copy version 10 proceed follows order make programs run some computers may necessary change param param lines 240 300 420440580600 1800 1900 2590 BASIC-80 accepts either sorhe will accept d problem trying load FSGAME Norman Rosenstocks Tandy 100 lap-size computer Some above changes put make run faster others make prettier output changes 2080-2095 correct error Version 10 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Texton/Allison Continued page 42 case landings seem consistent substantially improved purposes article have taken liberty leaving out large por tions extraordinarily complex pat tern recognition study have used segments feel directly ap plicable control RC aircraft further information Texton Theory Vision please refer following publications AT&T Bell Laboratories Record May 1984 pp 4-7 Bell Systems Technical Journal July August 1983 pp 1619-1645 SAFE FLYING IS NO ACCIDENT May1987 147 output Pacific Plan may seem little confusing first because permits two operating transmitters flight station Flight Station Game defined flight station place transmitter operates
Edition: Model Aviation - 1987/05
Page Numbers: 38, 39, 146, 147
Edition: Model Aviation - 1987/05
Page Numbers: 38, 39, 146, 147
G eorg eM Myers WHAT new radio should buy half letters readers month have asked same question What RC system can buyright nowthat will usable 1991 beyond possible answer want general-purpose airplane-only RC sys tem buy Futaba Conquest PCM system channel RC 12 Now did pick particular system channel tests Aberle Myers Steiner have shown good low-to-medium-priced system includes narrow-band receiver well narrow-band transmitter provides usual functions including servo reversing plus good built-in failsafe RC 12 usable right now either wideband narrow-band equipment will continue usable narrow-band systems beyond 1991 assuming have either dual-conversion receiver single-conversion receiver its local oscillator 7 1575 MHz What should buy difficult question answer cant guess needs dont know whether want buy best-performing low-priced system lowest-priced system P maxl 1991 performance dont know cpnsidering cheap wideband system ant narrow-band system impressive assembly chrome-plated knobs levers Perhaps want Helicopter radio Helicopter radio provides control func tions beginner needs Sailplanes powered sport models can also fly Helicopter basic two-stick 4/5 /6-channel airplane sys tem like Conquest PCM mentioned mo ment ago isnt suitable Helicopter know Should recommend system uses interchangeable crystals doesnt need big servos because intend fly Quarter Scale need oversize batteries because way LSF level V lot factors consider choice comes down old-design wideband system can get low price because dealer clearing Out inventory versus new-design expensive narrowband system have think terms much use will put An old wideband system will still acceptable AMA RC competition RC 12 38 40 42444648 50 52 54 56 until January 1 1991 Depending whether FCC chooses modify Part 95 its regulations match AMA Guidelines may/may usable legal system after 1991 turns out wideband systems arent legal after 1991 may still possible replace receiver narrow-band receiver retrofit transmitter narrow-band RE module thereby making legal after 1991 Either way can count least four years useful service An RC system has worked hard four years should need extensive service Four years long time Ni-Cd battery pack average 100 charges per year Four years servo wear can easily beat up servo motors 38 Model Aviation Dian five 35 planes use anyone walk out na RC sure thin ng wise channel complywith ssriction number sal he/she onn turi nitter start Fit Sta BK/mN WH/O iO FIt Sta B BK/RED Fit Sta C 4 BK/OR BK/BLI 52 Fit Sta Fit Sta E GRN WH/BN* RC54 together ER PacIfIc separations si ca B BK/RED BK/YEL LU WH/RED WH/VIO RC1 2* RC4O RC44 RC5O gether RU ILl w U 0 xx-4 xx TWO PILOTSTWO PILO Pacific Pian fortwo fiight stations aiiows maximum four pianos air anytwo Fit Sta anytwofrom Fit Sta B itoan expanded up five fiight stationsbut 60-ft separation between fiight stations must observed feedback potentiometers bill replacing Ni-Cds servos can easily exceed price new system prompts say Buy closeout expect work hard next few years arent particularly worried about losing plane some kind interference Beyond can say AMA HQ might build file radio system acceptances Continued page 146 want create FSGAME version 13 modifying copy version 10 proceed follows 40 Var 13 replaces Ver 10 replace existing lines 250 260 250 IF Z$ V OR ZSN THEN 260 ELSE 270 260 IF ZSY THEN 1870 ELSE 280 lines added 611 IF YR1987 AND F9 THEN 614 612 IF YR1988 AND F12 THEN 614 613 IF YR1991 AND F36 THEN 614 614 PRINT NO CAN DO PRINT CHR$171 616 GOTO 600 715 IF LTI585 OR L1585 THEN 720 ELSE 740 1165 IF LT58SOR LSl585 THEN 1170 ELSE 1190 1391 IF JF THEN 1392 ELSE 930 1392 FOR J1 TO F LOOKING FOR STORED ZEROS IN FIRST ROW 1393 IF LJI0 THEN 1396 1394 PRINT":NEXTJ 1395 GOTO 930 1396 PRINT TAB40 CAN DO PRINT CHRS71GOTO 1800 1480 GOTO 940 1495 IF JF THEN TT1GOTO 940 1575 PRINTREJNlREJNI 1805 IF WSY OR WS N THEN 1810 ELSE 1800 1992 IF CTR7 THEN 1994 ELSE 2000 1994 PRINT CHRS131CTRO 2095 LJ0N EXT J CLEANS OUT LJI ARRAY lines revised shown 280 delete DIM REJ201 290 DIM R601DIM REJ20N1 I0Z0P0 610 IF F1 OR FQ THEN 614 710 IF ABSLTIL1l44 THEN 715 ELSE 740 860 IF ABSLTLI)1 . 890 PRINT LTI10 KHZ OR 20 KHZ ADJ CH GOTO 900 1110 TEST replaces INTl 1120 IF ABSLTLSII1 OR AESLTILIJII1 . 1130 add OR BLSJ1W OR BL$lSW 1380 delete REFO 1390 add IF TF THEN 1392 ELSE 1400 1430 PRINTL4T 100R2OKHZADJCHGOTO 1450 1460 add 101 MEANS START REVIEWING REJECTS 1470 delete REFO 1500 FOR HJFI1 TO JPRINTLH1LH 1530 add COLUMNS HAVE BEEN TRIED 1540 PRINT:NEXTH 1550 change Z0 1570 delete Z1 1580 Z0NN1TT1 FGOTO 940 1690 IFJTTHEN 1710 1740 delete whole line 1750 FOR N1 TO N 1760 IF REJNOTHEN 1770 ELSE PRINTREJINI 1795 PRINT CHR$7 2040 add CLEANS REJECTS OUT OF DATA ARRAY 2060 add RESETS R FOR NEXT TRIAL 2080 REJN10NEXT N CLEANS OUT REJECT ARRAY 2090 FOR J1 TO 89 2540 add T51 2590 insert PRINT CHRSI7 - end * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202Air Cleaner Fine$225 Replacement Inserts Cat No104 Pk/2 InsertsCoarse$195 Cat No204 Pk/2 Inserts Fine$195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBYDEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 WV OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER TATONE 30-13 Use TATON ES ALUM MOTOR MOUNT THRUST TESTER determine maximum engine outpul using different 0 props fuel mixtures RPM levels ENGINE i THROTTLE CONTROL SAFETY STARTING LOCK flhck engine DIRECT READING - orTHRUST DIAL 1987 SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! FREE FUGHT K&B CUSTOMIZED ENGINES ALSO COMPLETE LINE OF U/C & R/C RACING PARTS SOLID UNES RACING WHEELS QUICK FILLS AND MORE.. WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. AJ iNTERCEPTOR4e9S compiete U-build Kit photos easy instructions NOTEPLE*SEAOO 5300 O P00*0f S DANOCING nESt 00E URUILD OES ADO TEN PERCENT OP PEICE POD EACA ADbrtIONAL ~CRAFT COMPANY RO Box 68132 Portland OR 97268 1000/0 Satisfaction Ouaraneea Money Back SEND 450 per 5/8 ID Coupler or550per3/4ID DANA AEROSPACE CORP 1110 E 5th St rior WI 54880 OLD TIMER SUPPLIES ORDER DY MAIL OR PHONE 714 830-5162 SOAR V NO COD VISA MASTERCARD WELCOME DEALER INQUIRIES INVITED ALL PRICES POSTPAID MINIMUM ORDER *1000 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HAS EAI R~ifl#MT0 Aflfl * TA V Meanwhile out California Owen Black has working out Pacific Plan flight stations very clever Pacific Plan takes middle element possible 31M triplet puts flight station Next two outside elements placed another flight station must least 60 ft flight station containing middle element way two elements must work together create 31M physically separated enough distance 31M manage produce weak cant detected RC receiver Flight Station Game differs Pacific Plan matter intrinsic assump tions Flight Station Game algorithm based assumption fliers will eventually stand shoulder-to-shoulder ignoring AMA recommendation 25-ft spacing maintained between flight stations flight station assignments developed Flight Station Game will protect individual fliers modeler-to-modeler interference stand shoulder-to-shoulder Pacific Plan assumes required 60ft separation flight stations will main tained fliers move together some reason flight station assignments developed Pacific Plan will protect modeler-to-modeler interference Pacific Plan arranged channel assignments also avoid 20P second order product image adjacent-channel problems Owens schemes easier sell group because use RC channel no rejects Tests George P Steiner using spectrum analyzer confirm validity Owens scheme Now didnt think Flight Station Game published February 1987 issue Model Aviation permits enter examine particular arrangements RC channels used club members also provides generalized solutions 1987 1988 1991 1995 situations because built program demonstrations Version 10 tried put equal numbers RC channels flight station contained bug have killed bug made other changes now offer version 13 tries maximize number channels used automatically makes assignments flight stations unequal want version 13 now available AMA HQ 525-in SSDD disks format ted MSDOS 2x MSDOS 3x Just send check $20 payable AMA Mortgage Retirement Fund state preference special order can produce single-sided 48 tpi formats Access CCS Cromenco IBM Kaypro Lobo Memotech Radio Shack LV Morrow NEC PC Omikron Osborne Superbrain Seequa DEC VT-80 Xerox Zenith Z-100 use Mycroft Labs Inc COMPAT v32 interested having such direct disk-interchange utility yourself contact Mycroft Labs PO Box 6045 Talla hassee FL 32314 want create version 13 ofFSGAME modifying copy version 10 proceed follows order make programs run some computers may necessary change param param lines 240 300 420440580600 1800 1900 2590 BASIC-80 accepts either sorhe will accept d problem trying load FSGAME Norman Rosenstocks Tandy 100 lap-size computer Some above changes put make run faster others make prettier output changes 2080-2095 correct error Version 10 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Texton/Allison Continued page 42 case landings seem consistent substantially improved purposes article have taken liberty leaving out large por tions extraordinarily complex pat tern recognition study have used segments feel directly ap plicable control RC aircraft further information Texton Theory Vision please refer following publications AT&T Bell Laboratories Record May 1984 pp 4-7 Bell Systems Technical Journal July August 1983 pp 1619-1645 SAFE FLYING IS NO ACCIDENT May1987 147 output Pacific Plan may seem little confusing first because permits two operating transmitters flight station Flight Station Game defined flight station place transmitter operates
Edition: Model Aviation - 1987/05
Page Numbers: 38, 39, 146, 147
G eorg eM Myers WHAT new radio should buy half letters readers month have asked same question What RC system can buyright nowthat will usable 1991 beyond possible answer want general-purpose airplane-only RC sys tem buy Futaba Conquest PCM system channel RC 12 Now did pick particular system channel tests Aberle Myers Steiner have shown good low-to-medium-priced system includes narrow-band receiver well narrow-band transmitter provides usual functions including servo reversing plus good built-in failsafe RC 12 usable right now either wideband narrow-band equipment will continue usable narrow-band systems beyond 1991 assuming have either dual-conversion receiver single-conversion receiver its local oscillator 7 1575 MHz What should buy difficult question answer cant guess needs dont know whether want buy best-performing low-priced system lowest-priced system P maxl 1991 performance dont know cpnsidering cheap wideband system ant narrow-band system impressive assembly chrome-plated knobs levers Perhaps want Helicopter radio Helicopter radio provides control func tions beginner needs Sailplanes powered sport models can also fly Helicopter basic two-stick 4/5 /6-channel airplane sys tem like Conquest PCM mentioned mo ment ago isnt suitable Helicopter know Should recommend system uses interchangeable crystals doesnt need big servos because intend fly Quarter Scale need oversize batteries because way LSF level V lot factors consider choice comes down old-design wideband system can get low price because dealer clearing Out inventory versus new-design expensive narrowband system have think terms much use will put An old wideband system will still acceptable AMA RC competition RC 12 38 40 42444648 50 52 54 56 until January 1 1991 Depending whether FCC chooses modify Part 95 its regulations match AMA Guidelines may/may usable legal system after 1991 turns out wideband systems arent legal after 1991 may still possible replace receiver narrow-band receiver retrofit transmitter narrow-band RE module thereby making legal after 1991 Either way can count least four years useful service An RC system has worked hard four years should need extensive service Four years long time Ni-Cd battery pack average 100 charges per year Four years servo wear can easily beat up servo motors 38 Model Aviation Dian five 35 planes use anyone walk out na RC sure thin ng wise channel complywith ssriction number sal he/she onn turi nitter start Fit Sta BK/mN WH/O iO FIt Sta B BK/RED Fit Sta C 4 BK/OR BK/BLI 52 Fit Sta Fit Sta E GRN WH/BN* RC54 together ER PacIfIc separations si ca B BK/RED BK/YEL LU WH/RED WH/VIO RC1 2* RC4O RC44 RC5O gether RU ILl w U 0 xx-4 xx TWO PILOTSTWO PILO Pacific Pian fortwo fiight stations aiiows maximum four pianos air anytwo Fit Sta anytwofrom Fit Sta B itoan expanded up five fiight stationsbut 60-ft separation between fiight stations must observed feedback potentiometers bill replacing Ni-Cds servos can easily exceed price new system prompts say Buy closeout expect work hard next few years arent particularly worried about losing plane some kind interference Beyond can say AMA HQ might build file radio system acceptances Continued page 146 want create FSGAME version 13 modifying copy version 10 proceed follows 40 Var 13 replaces Ver 10 replace existing lines 250 260 250 IF Z$ V OR ZSN THEN 260 ELSE 270 260 IF ZSY THEN 1870 ELSE 280 lines added 611 IF YR1987 AND F9 THEN 614 612 IF YR1988 AND F12 THEN 614 613 IF YR1991 AND F36 THEN 614 614 PRINT NO CAN DO PRINT CHR$171 616 GOTO 600 715 IF LTI585 OR L1585 THEN 720 ELSE 740 1165 IF LT58SOR LSl585 THEN 1170 ELSE 1190 1391 IF JF THEN 1392 ELSE 930 1392 FOR J1 TO F LOOKING FOR STORED ZEROS IN FIRST ROW 1393 IF LJI0 THEN 1396 1394 PRINT":NEXTJ 1395 GOTO 930 1396 PRINT TAB40 CAN DO PRINT CHRS71GOTO 1800 1480 GOTO 940 1495 IF JF THEN TT1GOTO 940 1575 PRINTREJNlREJNI 1805 IF WSY OR WS N THEN 1810 ELSE 1800 1992 IF CTR7 THEN 1994 ELSE 2000 1994 PRINT CHRS131CTRO 2095 LJ0N EXT J CLEANS OUT LJI ARRAY lines revised shown 280 delete DIM REJ201 290 DIM R601DIM REJ20N1 I0Z0P0 610 IF F1 OR FQ THEN 614 710 IF ABSLTIL1l44 THEN 715 ELSE 740 860 IF ABSLTLI)1 . 890 PRINT LTI10 KHZ OR 20 KHZ ADJ CH GOTO 900 1110 TEST replaces INTl 1120 IF ABSLTLSII1 OR AESLTILIJII1 . 1130 add OR BLSJ1W OR BL$lSW 1380 delete REFO 1390 add IF TF THEN 1392 ELSE 1400 1430 PRINTL4T 100R2OKHZADJCHGOTO 1450 1460 add 101 MEANS START REVIEWING REJECTS 1470 delete REFO 1500 FOR HJFI1 TO JPRINTLH1LH 1530 add COLUMNS HAVE BEEN TRIED 1540 PRINT:NEXTH 1550 change Z0 1570 delete Z1 1580 Z0NN1TT1 FGOTO 940 1690 IFJTTHEN 1710 1740 delete whole line 1750 FOR N1 TO N 1760 IF REJNOTHEN 1770 ELSE PRINTREJINI 1795 PRINT CHR$7 2040 add CLEANS REJECTS OUT OF DATA ARRAY 2060 add RESETS R FOR NEXT TRIAL 2080 REJN10NEXT N CLEANS OUT REJECT ARRAY 2090 FOR J1 TO 89 2540 add T51 2590 insert PRINT CHRSI7 - end * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202Air Cleaner Fine$225 Replacement Inserts Cat No104 Pk/2 InsertsCoarse$195 Cat No204 Pk/2 Inserts Fine$195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBYDEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 WV OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER TATONE 30-13 Use TATON ES ALUM MOTOR MOUNT THRUST TESTER determine maximum engine outpul using different 0 props fuel mixtures RPM levels ENGINE i THROTTLE CONTROL SAFETY STARTING LOCK flhck engine DIRECT READING - orTHRUST DIAL 1987 SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! FREE FUGHT K&B CUSTOMIZED ENGINES ALSO COMPLETE LINE OF U/C & R/C RACING PARTS SOLID UNES RACING WHEELS QUICK FILLS AND MORE.. WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. AJ iNTERCEPTOR4e9S compiete U-build Kit photos easy instructions NOTEPLE*SEAOO 5300 O P00*0f S DANOCING nESt 00E URUILD OES ADO TEN PERCENT OP PEICE POD EACA ADbrtIONAL ~CRAFT COMPANY RO Box 68132 Portland OR 97268 1000/0 Satisfaction Ouaraneea Money Back SEND 450 per 5/8 ID Coupler or550per3/4ID DANA AEROSPACE CORP 1110 E 5th St rior WI 54880 OLD TIMER SUPPLIES ORDER DY MAIL OR PHONE 714 830-5162 SOAR V NO COD VISA MASTERCARD WELCOME DEALER INQUIRIES INVITED ALL PRICES POSTPAID MINIMUM ORDER *1000 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HAS EAI R~ifl#MT0 Aflfl * TA V Meanwhile out California Owen Black has working out Pacific Plan flight stations very clever Pacific Plan takes middle element possible 31M triplet puts flight station Next two outside elements placed another flight station must least 60 ft flight station containing middle element way two elements must work together create 31M physically separated enough distance 31M manage produce weak cant detected RC receiver Flight Station Game differs Pacific Plan matter intrinsic assump tions Flight Station Game algorithm based assumption fliers will eventually stand shoulder-to-shoulder ignoring AMA recommendation 25-ft spacing maintained between flight stations flight station assignments developed Flight Station Game will protect individual fliers modeler-to-modeler interference stand shoulder-to-shoulder Pacific Plan assumes required 60ft separation flight stations will main tained fliers move together some reason flight station assignments developed Pacific Plan will protect modeler-to-modeler interference Pacific Plan arranged channel assignments also avoid 20P second order product image adjacent-channel problems Owens schemes easier sell group because use RC channel no rejects Tests George P Steiner using spectrum analyzer confirm validity Owens scheme Now didnt think Flight Station Game published February 1987 issue Model Aviation permits enter examine particular arrangements RC channels used club members also provides generalized solutions 1987 1988 1991 1995 situations because built program demonstrations Version 10 tried put equal numbers RC channels flight station contained bug have killed bug made other changes now offer version 13 tries maximize number channels used automatically makes assignments flight stations unequal want version 13 now available AMA HQ 525-in SSDD disks format ted MSDOS 2x MSDOS 3x Just send check $20 payable AMA Mortgage Retirement Fund state preference special order can produce single-sided 48 tpi formats Access CCS Cromenco IBM Kaypro Lobo Memotech Radio Shack LV Morrow NEC PC Omikron Osborne Superbrain Seequa DEC VT-80 Xerox Zenith Z-100 use Mycroft Labs Inc COMPAT v32 interested having such direct disk-interchange utility yourself contact Mycroft Labs PO Box 6045 Talla hassee FL 32314 want create version 13 ofFSGAME modifying copy version 10 proceed follows order make programs run some computers may necessary change param param lines 240 300 420440580600 1800 1900 2590 BASIC-80 accepts either sorhe will accept d problem trying load FSGAME Norman Rosenstocks Tandy 100 lap-size computer Some above changes put make run faster others make prettier output changes 2080-2095 correct error Version 10 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Texton/Allison Continued page 42 case landings seem consistent substantially improved purposes article have taken liberty leaving out large por tions extraordinarily complex pat tern recognition study have used segments feel directly ap plicable control RC aircraft further information Texton Theory Vision please refer following publications AT&T Bell Laboratories Record May 1984 pp 4-7 Bell Systems Technical Journal July August 1983 pp 1619-1645 SAFE FLYING IS NO ACCIDENT May1987 147 output Pacific Plan may seem little confusing first because permits two operating transmitters flight station Flight Station Game defined flight station place transmitter operates
Edition: Model Aviation - 1987/05
Page Numbers: 38, 39, 146, 147
G eorg eM Myers WHAT new radio should buy half letters readers month have asked same question What RC system can buyright nowthat will usable 1991 beyond possible answer want general-purpose airplane-only RC sys tem buy Futaba Conquest PCM system channel RC 12 Now did pick particular system channel tests Aberle Myers Steiner have shown good low-to-medium-priced system includes narrow-band receiver well narrow-band transmitter provides usual functions including servo reversing plus good built-in failsafe RC 12 usable right now either wideband narrow-band equipment will continue usable narrow-band systems beyond 1991 assuming have either dual-conversion receiver single-conversion receiver its local oscillator 7 1575 MHz What should buy difficult question answer cant guess needs dont know whether want buy best-performing low-priced system lowest-priced system P maxl 1991 performance dont know cpnsidering cheap wideband system ant narrow-band system impressive assembly chrome-plated knobs levers Perhaps want Helicopter radio Helicopter radio provides control func tions beginner needs Sailplanes powered sport models can also fly Helicopter basic two-stick 4/5 /6-channel airplane sys tem like Conquest PCM mentioned mo ment ago isnt suitable Helicopter know Should recommend system uses interchangeable crystals doesnt need big servos because intend fly Quarter Scale need oversize batteries because way LSF level V lot factors consider choice comes down old-design wideband system can get low price because dealer clearing Out inventory versus new-design expensive narrowband system have think terms much use will put An old wideband system will still acceptable AMA RC competition RC 12 38 40 42444648 50 52 54 56 until January 1 1991 Depending whether FCC chooses modify Part 95 its regulations match AMA Guidelines may/may usable legal system after 1991 turns out wideband systems arent legal after 1991 may still possible replace receiver narrow-band receiver retrofit transmitter narrow-band RE module thereby making legal after 1991 Either way can count least four years useful service An RC system has worked hard four years should need extensive service Four years long time Ni-Cd battery pack average 100 charges per year Four years servo wear can easily beat up servo motors 38 Model Aviation Dian five 35 planes use anyone walk out na RC sure thin ng wise channel complywith ssriction number sal he/she onn turi nitter start Fit Sta BK/mN WH/O iO FIt Sta B BK/RED Fit Sta C 4 BK/OR BK/BLI 52 Fit Sta Fit Sta E GRN WH/BN* RC54 together ER PacIfIc separations si ca B BK/RED BK/YEL LU WH/RED WH/VIO RC1 2* RC4O RC44 RC5O gether RU ILl w U 0 xx-4 xx TWO PILOTSTWO PILO Pacific Pian fortwo fiight stations aiiows maximum four pianos air anytwo Fit Sta anytwofrom Fit Sta B itoan expanded up five fiight stationsbut 60-ft separation between fiight stations must observed feedback potentiometers bill replacing Ni-Cds servos can easily exceed price new system prompts say Buy closeout expect work hard next few years arent particularly worried about losing plane some kind interference Beyond can say AMA HQ might build file radio system acceptances Continued page 146 want create FSGAME version 13 modifying copy version 10 proceed follows 40 Var 13 replaces Ver 10 replace existing lines 250 260 250 IF Z$ V OR ZSN THEN 260 ELSE 270 260 IF ZSY THEN 1870 ELSE 280 lines added 611 IF YR1987 AND F9 THEN 614 612 IF YR1988 AND F12 THEN 614 613 IF YR1991 AND F36 THEN 614 614 PRINT NO CAN DO PRINT CHR$171 616 GOTO 600 715 IF LTI585 OR L1585 THEN 720 ELSE 740 1165 IF LT58SOR LSl585 THEN 1170 ELSE 1190 1391 IF JF THEN 1392 ELSE 930 1392 FOR J1 TO F LOOKING FOR STORED ZEROS IN FIRST ROW 1393 IF LJI0 THEN 1396 1394 PRINT":NEXTJ 1395 GOTO 930 1396 PRINT TAB40 CAN DO PRINT CHRS71GOTO 1800 1480 GOTO 940 1495 IF JF THEN TT1GOTO 940 1575 PRINTREJNlREJNI 1805 IF WSY OR WS N THEN 1810 ELSE 1800 1992 IF CTR7 THEN 1994 ELSE 2000 1994 PRINT CHRS131CTRO 2095 LJ0N EXT J CLEANS OUT LJI ARRAY lines revised shown 280 delete DIM REJ201 290 DIM R601DIM REJ20N1 I0Z0P0 610 IF F1 OR FQ THEN 614 710 IF ABSLTIL1l44 THEN 715 ELSE 740 860 IF ABSLTLI)1 . 890 PRINT LTI10 KHZ OR 20 KHZ ADJ CH GOTO 900 1110 TEST replaces INTl 1120 IF ABSLTLSII1 OR AESLTILIJII1 . 1130 add OR BLSJ1W OR BL$lSW 1380 delete REFO 1390 add IF TF THEN 1392 ELSE 1400 1430 PRINTL4T 100R2OKHZADJCHGOTO 1450 1460 add 101 MEANS START REVIEWING REJECTS 1470 delete REFO 1500 FOR HJFI1 TO JPRINTLH1LH 1530 add COLUMNS HAVE BEEN TRIED 1540 PRINT:NEXTH 1550 change Z0 1570 delete Z1 1580 Z0NN1TT1 FGOTO 940 1690 IFJTTHEN 1710 1740 delete whole line 1750 FOR N1 TO N 1760 IF REJNOTHEN 1770 ELSE PRINTREJINI 1795 PRINT CHR$7 2040 add CLEANS REJECTS OUT OF DATA ARRAY 2060 add RESETS R FOR NEXT TRIAL 2080 REJN10NEXT N CLEANS OUT REJECT ARRAY 2090 FOR J1 TO 89 2540 add T51 2590 insert PRINT CHRSI7 - end * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202Air Cleaner Fine$225 Replacement Inserts Cat No104 Pk/2 InsertsCoarse$195 Cat No204 Pk/2 Inserts Fine$195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBYDEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 WV OPTIMIZE YOUR ENGINES OUTPUT TATONES THRUST TESTER TATONE 30-13 Use TATON ES ALUM MOTOR MOUNT THRUST TESTER determine maximum engine outpul using different 0 props fuel mixtures RPM levels ENGINE i THROTTLE CONTROL SAFETY STARTING LOCK flhck engine DIRECT READING - orTHRUST DIAL 1987 SPECILISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 05 IS & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD COX ENGINES IF ITS COX ENGINE CALL US! FREE FUGHT K&B CUSTOMIZED ENGINES ALSO COMPLETE LINE OF U/C & R/C RACING PARTS SOLID UNES RACING WHEELS QUICK FILLS AND MORE.. WE ALSO STOCK KLOTZ OIL BROAD RANGE OF GLOW PLUGS SPECIAL FUEL TUBING & HARD-TO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES CARBON FIBER COILS PLUGS CONDENSERS SILK TIMERS TRANSISTOR IGNITION SYSTEMS l/2A TEXACO ENGINES EVERYTHING YOU NEED FOR OLD TIMER INCLUDING REPLICA OR WiCK ENGINES NE WI! 1/2A PLAYBOY SR FOR l/2A TEXACO R/C FF ELECTRIC OR SPORT KIT $2995 Safety/Preston Continued page 22 ground After couple minutes engine nmning perfectly throttled back ofasuddenthe Heicopterenginestartedtorev up seconds hovering nicely boom deviation Moments later started climbing What first flight No need trim no need touch control sticks no need transmitter eithet What happened turned out battery voltage dropped below safe level fail-safe devices took control As result Helicopter became just point sky After engine stopped started coming down Hi roho must very proud because after autorotation Helicopter landed minor damage question after What reason fail-safe switches devices since dont know time attitude model really going use would like know readers have reported anything favor device really want opinion switch secondary frequency during emer gency because purpose lose control rather have control surfaces model move preset positions am familiar radio system involved seems fail-safe device throttle reversed drop battery voltage level unsafe should have closed throttle rather opened However issue question Antonis has asked readers What wants know advantage having con trol surfaces go preset position neutral case flying controls event trans mitter signal lost whatever reason Cer tainly isnt going help Aerobatic flier save model control surfaces suddenly go neutral middle complex maneuver other hand Im favor having engine go low throttle upon loss transmitter signal receiver battery voltage drops below safe level readers wish express opinions Id welcome letters Have safe month John Preston 2812 Northampton Sr N W Washington DC 20015 responding advertisers mention thatyou read aboutthem ModelAviation Doubler/Shepherd Continued page 36 be mowed grass little too tall lettering model done dry transfers art supply store coat clear Sig Skybrite applied over protection sponsor decals canopy model auto decal sheets pilot head started out Williams Bros figure back side goggles painted black enamel give appearance sunglasses am pleased way project has turned out easy build flies very nicely will either clip current wing build another reduced span will also trying other engines model ing event becoming quite popular local clubs 500 sport racer stock Royal 25s HR 25s clippedwing version should fit right expanding Pylon Racing event model qsite change pace decide build hope will have fun enjoy Remember fourcycles dont scream just putt-putt Radio Technique/Myers Continued page 39 FCC time will able tell whether system contemplating has certificated according AMA Guidelines Right now have nothing Resource managemenl Noninterfrring RC channel arrangements think Dennis Tier ney has best solution See Whistle Blows Dont Fly page 93 et seq Model Aviation March 1987 urge Dennis con tinue working design until includes 80 RC channels scheduled 1991 well seven old channels 27 MHz 50 MHz 53 MHz channels Besides should reduce wiring double-sided PC board will put him position sell useful gimmick RC airplane boat car clubs over United States Canada have feeling once people see easily Dennis gadget works organization will want Its sort self-policing transmitter impound manager Go Dennis 146 Model Aviation OUR REV-UP INVENTORY AVERAGES 12000 PROPSIII SEE OUR AD LAST MONTH FOR LIST OF PROPS AND PRICES ding iiThg ring. AJ iNTERCEPTOR4e9S compiete U-build Kit photos easy instructions NOTEPLE*SEAOO 5300 O P00*0f S DANOCING nESt 00E URUILD OES ADO TEN PERCENT OP PEICE POD EACA ADbrtIONAL ~CRAFT COMPANY RO Box 68132 Portland OR 97268 1000/0 Satisfaction Ouaraneea Money Back SEND 450 per 5/8 ID Coupler or550per3/4ID DANA AEROSPACE CORP 1110 E 5th St rior WI 54880 OLD TIMER SUPPLIES ORDER DY MAIL OR PHONE 714 830-5162 SOAR V NO COD VISA MASTERCARD WELCOME DEALER INQUIRIES INVITED ALL PRICES POSTPAID MINIMUM ORDER *1000 FOR INSURANCE ADD $100 ORDERS SHIPPED WITHIN 24 HAS EAI R~ifl#MT0 Aflfl * TA V Meanwhile out California Owen Black has working out Pacific Plan flight stations very clever Pacific Plan takes middle element possible 31M triplet puts flight station Next two outside elements placed another flight station must least 60 ft flight station containing middle element way two elements must work together create 31M physically separated enough distance 31M manage produce weak cant detected RC receiver Flight Station Game differs Pacific Plan matter intrinsic assump tions Flight Station Game algorithm based assumption fliers will eventually stand shoulder-to-shoulder ignoring AMA recommendation 25-ft spacing maintained between flight stations flight station assignments developed Flight Station Game will protect individual fliers modeler-to-modeler interference stand shoulder-to-shoulder Pacific Plan assumes required 60ft separation flight stations will main tained fliers move together some reason flight station assignments developed Pacific Plan will protect modeler-to-modeler interference Pacific Plan arranged channel assignments also avoid 20P second order product image adjacent-channel problems Owens schemes easier sell group because use RC channel no rejects Tests George P Steiner using spectrum analyzer confirm validity Owens scheme Now didnt think Flight Station Game published February 1987 issue Model Aviation permits enter examine particular arrangements RC channels used club members also provides generalized solutions 1987 1988 1991 1995 situations because built program demonstrations Version 10 tried put equal numbers RC channels flight station contained bug have killed bug made other changes now offer version 13 tries maximize number channels used automatically makes assignments flight stations unequal want version 13 now available AMA HQ 525-in SSDD disks format ted MSDOS 2x MSDOS 3x Just send check $20 payable AMA Mortgage Retirement Fund state preference special order can produce single-sided 48 tpi formats Access CCS Cromenco IBM Kaypro Lobo Memotech Radio Shack LV Morrow NEC PC Omikron Osborne Superbrain Seequa DEC VT-80 Xerox Zenith Z-100 use Mycroft Labs Inc COMPAT v32 interested having such direct disk-interchange utility yourself contact Mycroft Labs PO Box 6045 Talla hassee FL 32314 want create version 13 ofFSGAME modifying copy version 10 proceed follows order make programs run some computers may necessary change param param lines 240 300 420440580600 1800 1900 2590 BASIC-80 accepts either sorhe will accept d problem trying load FSGAME Norman Rosenstocks Tandy 100 lap-size computer Some above changes put make run faster others make prettier output changes 2080-2095 correct error Version 10 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Texton/Allison Continued page 42 case landings seem consistent substantially improved purposes article have taken liberty leaving out large por tions extraordinarily complex pat tern recognition study have used segments feel directly ap plicable control RC aircraft further information Texton Theory Vision please refer following publications AT&T Bell Laboratories Record May 1984 pp 4-7 Bell Systems Technical Journal July August 1983 pp 1619-1645 SAFE FLYING IS NO ACCIDENT May1987 147 output Pacific Plan may seem little confusing first because permits two operating transmitters flight station Flight Station Game defined flight station place transmitter operates
