Radio Technique George M WHO IS RESPONSIBLE RC transaiitter AMA acting its ca pacity National Representative Aero modeling United States has two missions 1 promote aeromodeling 2 keep records performing missions AMA does following 1 Advertises bene fits model aviation accomplish ments AMA members 2 Codifies publishes rules competition 3 Sanc tions contests conducted members 4 Conducts national international con tests 5 Homologates certifies records both nationwide worldwide homologating records sometimes necessary certify characteristics equipment used competition Indi vidual Contest Directors required example certify physical dimensions model essential compe tition such total weight wing area displacement engines etc re quired consider RC system thing Contest Director has required to assure RC system used sanctioned competition car ries appropriate AMA-designated RC channel identification flag Official Model Aircraft Regulations 1984-85 edition pp 128 129 special events like Class RC Saliplanes CD has monitor RC system used ie Rudder Elevator Aileron Elevator important point has always still remains responsibility contestant assure AMA contest organizers other con testants radio proposes use AMA-sanctioned competition operating frequency designated flag its antenna has technical characteristics required Federal Communications Commission FCC situation same RC flying done away contest persons RC system interferes another persons RC system accident oc curs result interference fault liability may belong operator offending transmitter operator receiver being interfered neither both However accidents another matter Accidents happen AMA has arranged liability insurance can still friends after occurs Contest Directors assume responsi bility conduct safe contest within limits rule book prudent activities what justifies writing AMA Safety Code page 133 rule book writing rules like pull tests Control Line models Though isnt written down rule RC contestants depend Contest Directors good judgement organize activities no two contestants asked operate particular RC channel same time commonsense safety re quirement use transmitter impound areas frequency-clip boards RF monitors also strongly recommended AMA required page 129 rule book again may wonder required answer safety members business says AMA Member Responsibility section rule bookright page 1 possible operate safely frequen cy-clip boards etc AMA willingto accept method works Providing service contestants group AMA representatives may discretion ask permission check electromagnetic performance RC system presented use AMAsanctioned contest contestant may re fuse permit check Contest Director can refuse accept person contest AMA will back CD arguments type key prudence prudent ask such 36 Model Aviation Alrtronics scanneror couple other similar devIcesare Contest Director needs verify transmitters operatIng frequency matches frequency fiag Its antenna ciub should have least monitor transmitter check check asked contestants becomes mem bers responsibility comply withdraw event usual reason checking transmit ters confirm frequency emitted transmitter matches flag its antenna Nats sometimes find two dont doesnt rule out checks other reasons such spurious emissions CD has reason suspect contestants transmitter malfunc tioning CD has right check common good having checked CD must check because other transmitters maybe causing interference course may also re ceiver problem flag frequency/check can made device simple scanner elaborate tests approaching FCC Type Acceptance procedures necessary emphasis particular see no reason procedure re quires RC system disassembled opened inspection way engine inspector RC Pylon Racing CL Speed/Racing events opens up engine apply micrometers other inspection tools Dan Kahn showed up 1983 Nats elaborate test setup purpose collect data AMA Frequency Committee could assess peculiar new situationour first large use new old RC channels together Having assessed transmitters performances scientifically estab lished credible database CD Gene Shelkey gave us test Gene used eight winches keep average 16 Sailplanes air simultaneously two contest days no complaints mod eler-to-modeler RC interference con cluded AMA Phase-In Plan suitable way deal new RC channels preserving use old equip ment main point consider time virtually radio used 1983 AM type RC channel spacing 40 kHz 72 MHz band 1985 Nats will present new situation expect 75% RC systems present will new since 1983 Further expect will large number PCM-type sets use least half transmitters will operate FM things go planned may again elaborate test setup build support new data base will show well current crop FM systems gets along older AM systemsand Since receiver operation primary concern new situation work ing device very sensitive antenna can placed alongside airplane record power spectral den sity receivers local oscillator find anomalies later correlate modeler-to-modeler interference formation will passed manufac turers will done promote safe RC aeromodeling speculation part bear quote answer readers tale Helicopters glitches crashes frustration particular FM set letter written Mr Cecil Bell 144 Holm Rd #14 Watsonville CA 95076 Heres what said letter typical others Best suggestion point request manufacturer replace FM transmitter module receiver Continued pare 38 August 1985 37 frequency monitor built John Lange now member AMA Fre quency Committee donated AMA have tune hand its capable monitoring RC channeis Ham 72 MHz 75 MHz bandsas weli checking whats going cracks between RC channeis Chartered ciubs can request twoweek ioan equipment contacting AMA HO Although panei monitor prociaims Reaiistic Radio Shack unit its actuaiiy one-ofa-kind device capabie monitoring aii 72 75 MHz channeis automaticaiiy can programmed iook channeis close together 5 kHzI too avaiia bie Chartered clubs two-week ioan AMA HOexcept being used big AMA events iike Nats Being compieteiy automatic equipped tape recorder output can ieft entireiy unattended trap intermittent interferences tape recorder has VOX automatic start mike picks up sound feature tape wiii oniy record interference present vaiuabie timecompression tooi searching something dont reaiiy know oak Works 110 voits C 12 voits DC MORE NEW KITS FROM 114 TWO DESIGNED FOR 05 ELECTRIC POWER RQIN SPORT SCALE 54 S PA N 425 sq AREA $4495 C4& BILL WINTER design 58 SPAN 490 sqAREA $4795 AND TWO COMPETITION SAILPLANES PROPHET 941 995 SPAN 941 sqAREA 60-65 az/sq WING LOADING $9995 PROPHET TWO METER 631 sqAREA 65-70 az/sq WING LOADING $5395 h DAVEY EUSYSTEMS U CORPORATION ONE WOOD LANEMALVERNPA19355 215644-6772 DEALER INQUIRIES INVITED YOUR SOURCE FOR HISTARTS THE RETRIEVER WINCHES ELECTRIC MO TORS AND OTHER QUIET FLIGHT SUPPLIES AM version have stock would expect will cost around $100 per radio system might satisfy description lutions found similar problems dif ficuty single-conversion FM re ceiver could its S042P chip RC sys tem-designers have told its mixer section just isnt good enough 72 MHz FM defect showed up rather clearly production units went service Most likely prototypes worked better because engineers technicians con centrated making work have heard generic S042P 5044 5045 chips now being used just arent good original branded manufacturers products RC manufactur ers just upset situation Use generic chips may explain some radios lose just channel everything else seems check out OK Since Im guessing receiver problem second alternative might replace current FM receiver true narrow-band FM receiver someone else manufacturer will have soon Ive told already have narrow-band receiver PCM system havent actually seen Futaba Kraft Airtronics have narrowband receivers PCM already others such Ace R/G have announced intentions offer Initially price true narrow-band receiver may over $100 FM isnt inherently poorer AM has done right folks remember what commercial FM radio like back 1 950s doreceivers drifted like boat strong wind remember add voltage regulator tube expensive Hi-Fi kit tuner stop drifting Today $10 pocket FM radio drift-free problem now create narrow-band design RC works Dont give up Helicopters experts crash will reach point crashes due wearout outside influences dont feel upset navy some pity poor CD Re cently dispute erupted over foreignmade RC system operated AIvIA member F3B team trials reported system question operating properly FCC-desig nated AMA-sanctioned RC channel bore appropriate flag facts CD could have no objection use RC system Another modeler entered trials protested RC system question Type Accepted FCC therefore should disqualified competition Contest Direc tor disagreed nothing 1984-85 AMA rule book about disquali fying transmitters Type AcContinued page 41 38 Model Aviation mndd craft T TOUCH UP AIR BRUSH FOR DETAIL PAINTING OF AIRPLANE WINGS $4O ARISTO TEX COVERING MATERIAL NEW AND THE REST YET CONTOURS BETTER WITH RICH COLORS BETTER STICKAND FUEL RES STAN BLUE BLACK ORANGE F GREEN OGE YEL OW 2 METER ROLL $720 TACHOMETER W/LED READ OUT FOR EASY FELD READING CAflXJ ACCURATE ENGINE RPM IECE WOOD ---- CARVING SET FOR HOBBYISTS/f \ QUICK HEAT SOLDERING GUN lWWATT 21 PIECE TOOL SET US SIZE SCREWDRIVERS PLUS PHILLIPS HEX AND WRENCH TYPES hIPLE HANDS WITH MAGNIFIER FOR EXTRA HELP IN HOLDING THOSE SMALL PARTS WHILE SOLDERING GLUING OR PAINTING 7 WITH MULTI-POSITION 39 PLEXIBLE ARM 3 DIOPTER $3o LENS FOR 4 TiMES MAGN F CAT DN mode craft HobJ MAGNIFIER LAMP cepted Editors note press time July issue AMA News arrived John Griggs Presidents Cornercolumn has information situation RMcM OnApril 13 1985theAMAFrequency Committee met all-day session AMA HQ discuss matters Among committee has proposed Exec utive Council following added RC GENERAL sect jon AMA rule book cut off future debates type 1 AMA endorses compliance FCC Regulations AMA members 2 Contest Directors may dis cretion perform tests RC systems make special RC channel use accom modations suit local conditions 3 Foreign contestants intending enter US contests foreign RC systems operating foreign RC channels should contact AMA HQ advance contest date Rule 1 should self-explanatory believe citizen should follow law recognize AMA char tered act upaid police force government authority Specifically AMA has invested authority police 72 MHz band FCC correct procedure citizen lieves another citizen breaking law complain proper authority applies whether presumed infraction driving excessive speed public intoxi cation using illegal radio transmitter proper place complain about illegal radios local Field Service Engineer Office FCC should note AMA President John C Grigg stated policy Type Ac ceptance stickers RC transmitters January 1985 issue MA Competition Newsletter page 115 Attention RC Fliers withdrew policy Presidents Corner column AMA News forMarch 1985 alsoMA page 93 AMAs legal counsel Jeremiah Court ney advised thatonly FCC Type Accepted Type Approved equipment may used legally 72 MHz frequencies should read about John Wrths column Model Aviation June 1985 page 100 would interesting compare references Minute XV AMA Executive Council meeting reported page 100 May 1985 issue MA Rule 2 specifically allows CDs check contestants assurances fre quency flag match RC system has appropriate performance char acteristics well things like tie together groups frequency pins pro hibit use specific channels deal local interference problems also gives CD authority setup flight lines trans mitter impound areas and/or make what ever RC channel use procedures deems appropriate situation Rule 3 allows such situations World Cup competition might expect have European contestants op erating 35 40 MHz channels AMA HQ can usually get waiver FCC such uses would include waiver need Type Acceptance However very important waiver doesnt guarantee non-interference Foreign competitors must operate under same Secondary User restrictions about Canadians con sidering Canadians US contests discussed last month have long history reciprocal usage mean let us use RC channels Canada let use US A$A Executive Director John Worth says reciprocity official time havent told revoked cant prove still effect either issue bit clouded first place never got permission FCC use 72720 72760 72800 72840 MHz Canadians did get permission government still use have tie clip 72720 RC46 72760 RC48 72800 RCSO 72840 RC52 let Canadians use frequencies Next Canadians chose activate interstitial channels 7201 7203 7205. MHz rather fol low AMA Phase-In Plan puts Canadian RC channels 20 kHz spac ingas intended 1991 AMA Phase-In Plan designed protect old equipment long possible Canadian Plan apparently designed press Narrow-Band Equipment Now position seem getting pushed AM/FM con troversy fly Canada pay attention clip board because its different Ill bet Kraft Synthesizer very popular along border following formulas converting between RC channel number cor responding frequency MHz may interest fly Canadians 1 Frequency MHz hannel number O 2 RC Channel number 50Frequency MHz See much easier everyone just uses RC channel numbers Last-minute flash New Flag proposal now think should called Narrow-Band Flag accepted passed Executive Council Watch details Competition Newsletter George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY August 1985 41
Edition: Model Aviation - 1985/08
Page Numbers: 36, 37, 38, 41
Edition: Model Aviation - 1985/08
Page Numbers: 36, 37, 38, 41
Radio Technique George M WHO IS RESPONSIBLE RC transaiitter AMA acting its ca pacity National Representative Aero modeling United States has two missions 1 promote aeromodeling 2 keep records performing missions AMA does following 1 Advertises bene fits model aviation accomplish ments AMA members 2 Codifies publishes rules competition 3 Sanc tions contests conducted members 4 Conducts national international con tests 5 Homologates certifies records both nationwide worldwide homologating records sometimes necessary certify characteristics equipment used competition Indi vidual Contest Directors required example certify physical dimensions model essential compe tition such total weight wing area displacement engines etc re quired consider RC system thing Contest Director has required to assure RC system used sanctioned competition car ries appropriate AMA-designated RC channel identification flag Official Model Aircraft Regulations 1984-85 edition pp 128 129 special events like Class RC Saliplanes CD has monitor RC system used ie Rudder Elevator Aileron Elevator important point has always still remains responsibility contestant assure AMA contest organizers other con testants radio proposes use AMA-sanctioned competition operating frequency designated flag its antenna has technical characteristics required Federal Communications Commission FCC situation same RC flying done away contest persons RC system interferes another persons RC system accident oc curs result interference fault liability may belong operator offending transmitter operator receiver being interfered neither both However accidents another matter Accidents happen AMA has arranged liability insurance can still friends after occurs Contest Directors assume responsi bility conduct safe contest within limits rule book prudent activities what justifies writing AMA Safety Code page 133 rule book writing rules like pull tests Control Line models Though isnt written down rule RC contestants depend Contest Directors good judgement organize activities no two contestants asked operate particular RC channel same time commonsense safety re quirement use transmitter impound areas frequency-clip boards RF monitors also strongly recommended AMA required page 129 rule book again may wonder required answer safety members business says AMA Member Responsibility section rule bookright page 1 possible operate safely frequen cy-clip boards etc AMA willingto accept method works Providing service contestants group AMA representatives may discretion ask permission check electromagnetic performance RC system presented use AMAsanctioned contest contestant may re fuse permit check Contest Director can refuse accept person contest AMA will back CD arguments type key prudence prudent ask such 36 Model Aviation Alrtronics scanneror couple other similar devIcesare Contest Director needs verify transmitters operatIng frequency matches frequency fiag Its antenna ciub should have least monitor transmitter check check asked contestants becomes mem bers responsibility comply withdraw event usual reason checking transmit ters confirm frequency emitted transmitter matches flag its antenna Nats sometimes find two dont doesnt rule out checks other reasons such spurious emissions CD has reason suspect contestants transmitter malfunc tioning CD has right check common good having checked CD must check because other transmitters maybe causing interference course may also re ceiver problem flag frequency/check can made device simple scanner elaborate tests approaching FCC Type Acceptance procedures necessary emphasis particular see no reason procedure re quires RC system disassembled opened inspection way engine inspector RC Pylon Racing CL Speed/Racing events opens up engine apply micrometers other inspection tools Dan Kahn showed up 1983 Nats elaborate test setup purpose collect data AMA Frequency Committee could assess peculiar new situationour first large use new old RC channels together Having assessed transmitters performances scientifically estab lished credible database CD Gene Shelkey gave us test Gene used eight winches keep average 16 Sailplanes air simultaneously two contest days no complaints mod eler-to-modeler RC interference con cluded AMA Phase-In Plan suitable way deal new RC channels preserving use old equip ment main point consider time virtually radio used 1983 AM type RC channel spacing 40 kHz 72 MHz band 1985 Nats will present new situation expect 75% RC systems present will new since 1983 Further expect will large number PCM-type sets use least half transmitters will operate FM things go planned may again elaborate test setup build support new data base will show well current crop FM systems gets along older AM systemsand Since receiver operation primary concern new situation work ing device very sensitive antenna can placed alongside airplane record power spectral den sity receivers local oscillator find anomalies later correlate modeler-to-modeler interference formation will passed manufac turers will done promote safe RC aeromodeling speculation part bear quote answer readers tale Helicopters glitches crashes frustration particular FM set letter written Mr Cecil Bell 144 Holm Rd #14 Watsonville CA 95076 Heres what said letter typical others Best suggestion point request manufacturer replace FM transmitter module receiver Continued pare 38 August 1985 37 frequency monitor built John Lange now member AMA Fre quency Committee donated AMA have tune hand its capable monitoring RC channeis Ham 72 MHz 75 MHz bandsas weli checking whats going cracks between RC channeis Chartered ciubs can request twoweek ioan equipment contacting AMA HO Although panei monitor prociaims Reaiistic Radio Shack unit its actuaiiy one-ofa-kind device capabie monitoring aii 72 75 MHz channeis automaticaiiy can programmed iook channeis close together 5 kHzI too avaiia bie Chartered clubs two-week ioan AMA HOexcept being used big AMA events iike Nats Being compieteiy automatic equipped tape recorder output can ieft entireiy unattended trap intermittent interferences tape recorder has VOX automatic start mike picks up sound feature tape wiii oniy record interference present vaiuabie timecompression tooi searching something dont reaiiy know oak Works 110 voits C 12 voits DC MORE NEW KITS FROM 114 TWO DESIGNED FOR 05 ELECTRIC POWER RQIN SPORT SCALE 54 S PA N 425 sq AREA $4495 C4& BILL WINTER design 58 SPAN 490 sqAREA $4795 AND TWO COMPETITION SAILPLANES PROPHET 941 995 SPAN 941 sqAREA 60-65 az/sq WING LOADING $9995 PROPHET TWO METER 631 sqAREA 65-70 az/sq WING LOADING $5395 h DAVEY EUSYSTEMS U CORPORATION ONE WOOD LANEMALVERNPA19355 215644-6772 DEALER INQUIRIES INVITED YOUR SOURCE FOR HISTARTS THE RETRIEVER WINCHES ELECTRIC MO TORS AND OTHER QUIET FLIGHT SUPPLIES AM version have stock would expect will cost around $100 per radio system might satisfy description lutions found similar problems dif ficuty single-conversion FM re ceiver could its S042P chip RC sys tem-designers have told its mixer section just isnt good enough 72 MHz FM defect showed up rather clearly production units went service Most likely prototypes worked better because engineers technicians con centrated making work have heard generic S042P 5044 5045 chips now being used just arent good original branded manufacturers products RC manufactur ers just upset situation Use generic chips may explain some radios lose just channel everything else seems check out OK Since Im guessing receiver problem second alternative might replace current FM receiver true narrow-band FM receiver someone else manufacturer will have soon Ive told already have narrow-band receiver PCM system havent actually seen Futaba Kraft Airtronics have narrowband receivers PCM already others such Ace R/G have announced intentions offer Initially price true narrow-band receiver may over $100 FM isnt inherently poorer AM has done right folks remember what commercial FM radio like back 1 950s doreceivers drifted like boat strong wind remember add voltage regulator tube expensive Hi-Fi kit tuner stop drifting Today $10 pocket FM radio drift-free problem now create narrow-band design RC works Dont give up Helicopters experts crash will reach point crashes due wearout outside influences dont feel upset navy some pity poor CD Re cently dispute erupted over foreignmade RC system operated AIvIA member F3B team trials reported system question operating properly FCC-desig nated AMA-sanctioned RC channel bore appropriate flag facts CD could have no objection use RC system Another modeler entered trials protested RC system question Type Accepted FCC therefore should disqualified competition Contest Direc tor disagreed nothing 1984-85 AMA rule book about disquali fying transmitters Type AcContinued page 41 38 Model Aviation mndd craft T TOUCH UP AIR BRUSH FOR DETAIL PAINTING OF AIRPLANE WINGS $4O ARISTO TEX COVERING MATERIAL NEW AND THE REST YET CONTOURS BETTER WITH RICH COLORS BETTER STICKAND FUEL RES STAN BLUE BLACK ORANGE F GREEN OGE YEL OW 2 METER ROLL $720 TACHOMETER W/LED READ OUT FOR EASY FELD READING CAflXJ ACCURATE ENGINE RPM IECE WOOD ---- CARVING SET FOR HOBBYISTS/f \ QUICK HEAT SOLDERING GUN lWWATT 21 PIECE TOOL SET US SIZE SCREWDRIVERS PLUS PHILLIPS HEX AND WRENCH TYPES hIPLE HANDS WITH MAGNIFIER FOR EXTRA HELP IN HOLDING THOSE SMALL PARTS WHILE SOLDERING GLUING OR PAINTING 7 WITH MULTI-POSITION 39 PLEXIBLE ARM 3 DIOPTER $3o LENS FOR 4 TiMES MAGN F CAT DN mode craft HobJ MAGNIFIER LAMP cepted Editors note press time July issue AMA News arrived John Griggs Presidents Cornercolumn has information situation RMcM OnApril 13 1985theAMAFrequency Committee met all-day session AMA HQ discuss matters Among committee has proposed Exec utive Council following added RC GENERAL sect jon AMA rule book cut off future debates type 1 AMA endorses compliance FCC Regulations AMA members 2 Contest Directors may dis cretion perform tests RC systems make special RC channel use accom modations suit local conditions 3 Foreign contestants intending enter US contests foreign RC systems operating foreign RC channels should contact AMA HQ advance contest date Rule 1 should self-explanatory believe citizen should follow law recognize AMA char tered act upaid police force government authority Specifically AMA has invested authority police 72 MHz band FCC correct procedure citizen lieves another citizen breaking law complain proper authority applies whether presumed infraction driving excessive speed public intoxi cation using illegal radio transmitter proper place complain about illegal radios local Field Service Engineer Office FCC should note AMA President John C Grigg stated policy Type Ac ceptance stickers RC transmitters January 1985 issue MA Competition Newsletter page 115 Attention RC Fliers withdrew policy Presidents Corner column AMA News forMarch 1985 alsoMA page 93 AMAs legal counsel Jeremiah Court ney advised thatonly FCC Type Accepted Type Approved equipment may used legally 72 MHz frequencies should read about John Wrths column Model Aviation June 1985 page 100 would interesting compare references Minute XV AMA Executive Council meeting reported page 100 May 1985 issue MA Rule 2 specifically allows CDs check contestants assurances fre quency flag match RC system has appropriate performance char acteristics well things like tie together groups frequency pins pro hibit use specific channels deal local interference problems also gives CD authority setup flight lines trans mitter impound areas and/or make what ever RC channel use procedures deems appropriate situation Rule 3 allows such situations World Cup competition might expect have European contestants op erating 35 40 MHz channels AMA HQ can usually get waiver FCC such uses would include waiver need Type Acceptance However very important waiver doesnt guarantee non-interference Foreign competitors must operate under same Secondary User restrictions about Canadians con sidering Canadians US contests discussed last month have long history reciprocal usage mean let us use RC channels Canada let use US A$A Executive Director John Worth says reciprocity official time havent told revoked cant prove still effect either issue bit clouded first place never got permission FCC use 72720 72760 72800 72840 MHz Canadians did get permission government still use have tie clip 72720 RC46 72760 RC48 72800 RCSO 72840 RC52 let Canadians use frequencies Next Canadians chose activate interstitial channels 7201 7203 7205. MHz rather fol low AMA Phase-In Plan puts Canadian RC channels 20 kHz spac ingas intended 1991 AMA Phase-In Plan designed protect old equipment long possible Canadian Plan apparently designed press Narrow-Band Equipment Now position seem getting pushed AM/FM con troversy fly Canada pay attention clip board because its different Ill bet Kraft Synthesizer very popular along border following formulas converting between RC channel number cor responding frequency MHz may interest fly Canadians 1 Frequency MHz hannel number O 2 RC Channel number 50Frequency MHz See much easier everyone just uses RC channel numbers Last-minute flash New Flag proposal now think should called Narrow-Band Flag accepted passed Executive Council Watch details Competition Newsletter George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY August 1985 41
Edition: Model Aviation - 1985/08
Page Numbers: 36, 37, 38, 41
Radio Technique George M WHO IS RESPONSIBLE RC transaiitter AMA acting its ca pacity National Representative Aero modeling United States has two missions 1 promote aeromodeling 2 keep records performing missions AMA does following 1 Advertises bene fits model aviation accomplish ments AMA members 2 Codifies publishes rules competition 3 Sanc tions contests conducted members 4 Conducts national international con tests 5 Homologates certifies records both nationwide worldwide homologating records sometimes necessary certify characteristics equipment used competition Indi vidual Contest Directors required example certify physical dimensions model essential compe tition such total weight wing area displacement engines etc re quired consider RC system thing Contest Director has required to assure RC system used sanctioned competition car ries appropriate AMA-designated RC channel identification flag Official Model Aircraft Regulations 1984-85 edition pp 128 129 special events like Class RC Saliplanes CD has monitor RC system used ie Rudder Elevator Aileron Elevator important point has always still remains responsibility contestant assure AMA contest organizers other con testants radio proposes use AMA-sanctioned competition operating frequency designated flag its antenna has technical characteristics required Federal Communications Commission FCC situation same RC flying done away contest persons RC system interferes another persons RC system accident oc curs result interference fault liability may belong operator offending transmitter operator receiver being interfered neither both However accidents another matter Accidents happen AMA has arranged liability insurance can still friends after occurs Contest Directors assume responsi bility conduct safe contest within limits rule book prudent activities what justifies writing AMA Safety Code page 133 rule book writing rules like pull tests Control Line models Though isnt written down rule RC contestants depend Contest Directors good judgement organize activities no two contestants asked operate particular RC channel same time commonsense safety re quirement use transmitter impound areas frequency-clip boards RF monitors also strongly recommended AMA required page 129 rule book again may wonder required answer safety members business says AMA Member Responsibility section rule bookright page 1 possible operate safely frequen cy-clip boards etc AMA willingto accept method works Providing service contestants group AMA representatives may discretion ask permission check electromagnetic performance RC system presented use AMAsanctioned contest contestant may re fuse permit check Contest Director can refuse accept person contest AMA will back CD arguments type key prudence prudent ask such 36 Model Aviation Alrtronics scanneror couple other similar devIcesare Contest Director needs verify transmitters operatIng frequency matches frequency fiag Its antenna ciub should have least monitor transmitter check check asked contestants becomes mem bers responsibility comply withdraw event usual reason checking transmit ters confirm frequency emitted transmitter matches flag its antenna Nats sometimes find two dont doesnt rule out checks other reasons such spurious emissions CD has reason suspect contestants transmitter malfunc tioning CD has right check common good having checked CD must check because other transmitters maybe causing interference course may also re ceiver problem flag frequency/check can made device simple scanner elaborate tests approaching FCC Type Acceptance procedures necessary emphasis particular see no reason procedure re quires RC system disassembled opened inspection way engine inspector RC Pylon Racing CL Speed/Racing events opens up engine apply micrometers other inspection tools Dan Kahn showed up 1983 Nats elaborate test setup purpose collect data AMA Frequency Committee could assess peculiar new situationour first large use new old RC channels together Having assessed transmitters performances scientifically estab lished credible database CD Gene Shelkey gave us test Gene used eight winches keep average 16 Sailplanes air simultaneously two contest days no complaints mod eler-to-modeler RC interference con cluded AMA Phase-In Plan suitable way deal new RC channels preserving use old equip ment main point consider time virtually radio used 1983 AM type RC channel spacing 40 kHz 72 MHz band 1985 Nats will present new situation expect 75% RC systems present will new since 1983 Further expect will large number PCM-type sets use least half transmitters will operate FM things go planned may again elaborate test setup build support new data base will show well current crop FM systems gets along older AM systemsand Since receiver operation primary concern new situation work ing device very sensitive antenna can placed alongside airplane record power spectral den sity receivers local oscillator find anomalies later correlate modeler-to-modeler interference formation will passed manufac turers will done promote safe RC aeromodeling speculation part bear quote answer readers tale Helicopters glitches crashes frustration particular FM set letter written Mr Cecil Bell 144 Holm Rd #14 Watsonville CA 95076 Heres what said letter typical others Best suggestion point request manufacturer replace FM transmitter module receiver Continued pare 38 August 1985 37 frequency monitor built John Lange now member AMA Fre quency Committee donated AMA have tune hand its capable monitoring RC channeis Ham 72 MHz 75 MHz bandsas weli checking whats going cracks between RC channeis Chartered ciubs can request twoweek ioan equipment contacting AMA HO Although panei monitor prociaims Reaiistic Radio Shack unit its actuaiiy one-ofa-kind device capabie monitoring aii 72 75 MHz channeis automaticaiiy can programmed iook channeis close together 5 kHzI too avaiia bie Chartered clubs two-week ioan AMA HOexcept being used big AMA events iike Nats Being compieteiy automatic equipped tape recorder output can ieft entireiy unattended trap intermittent interferences tape recorder has VOX automatic start mike picks up sound feature tape wiii oniy record interference present vaiuabie timecompression tooi searching something dont reaiiy know oak Works 110 voits C 12 voits DC MORE NEW KITS FROM 114 TWO DESIGNED FOR 05 ELECTRIC POWER RQIN SPORT SCALE 54 S PA N 425 sq AREA $4495 C4& BILL WINTER design 58 SPAN 490 sqAREA $4795 AND TWO COMPETITION SAILPLANES PROPHET 941 995 SPAN 941 sqAREA 60-65 az/sq WING LOADING $9995 PROPHET TWO METER 631 sqAREA 65-70 az/sq WING LOADING $5395 h DAVEY EUSYSTEMS U CORPORATION ONE WOOD LANEMALVERNPA19355 215644-6772 DEALER INQUIRIES INVITED YOUR SOURCE FOR HISTARTS THE RETRIEVER WINCHES ELECTRIC MO TORS AND OTHER QUIET FLIGHT SUPPLIES AM version have stock would expect will cost around $100 per radio system might satisfy description lutions found similar problems dif ficuty single-conversion FM re ceiver could its S042P chip RC sys tem-designers have told its mixer section just isnt good enough 72 MHz FM defect showed up rather clearly production units went service Most likely prototypes worked better because engineers technicians con centrated making work have heard generic S042P 5044 5045 chips now being used just arent good original branded manufacturers products RC manufactur ers just upset situation Use generic chips may explain some radios lose just channel everything else seems check out OK Since Im guessing receiver problem second alternative might replace current FM receiver true narrow-band FM receiver someone else manufacturer will have soon Ive told already have narrow-band receiver PCM system havent actually seen Futaba Kraft Airtronics have narrowband receivers PCM already others such Ace R/G have announced intentions offer Initially price true narrow-band receiver may over $100 FM isnt inherently poorer AM has done right folks remember what commercial FM radio like back 1 950s doreceivers drifted like boat strong wind remember add voltage regulator tube expensive Hi-Fi kit tuner stop drifting Today $10 pocket FM radio drift-free problem now create narrow-band design RC works Dont give up Helicopters experts crash will reach point crashes due wearout outside influences dont feel upset navy some pity poor CD Re cently dispute erupted over foreignmade RC system operated AIvIA member F3B team trials reported system question operating properly FCC-desig nated AMA-sanctioned RC channel bore appropriate flag facts CD could have no objection use RC system Another modeler entered trials protested RC system question Type Accepted FCC therefore should disqualified competition Contest Direc tor disagreed nothing 1984-85 AMA rule book about disquali fying transmitters Type AcContinued page 41 38 Model Aviation mndd craft T TOUCH UP AIR BRUSH FOR DETAIL PAINTING OF AIRPLANE WINGS $4O ARISTO TEX COVERING MATERIAL NEW AND THE REST YET CONTOURS BETTER WITH RICH COLORS BETTER STICKAND FUEL RES STAN BLUE BLACK ORANGE F GREEN OGE YEL OW 2 METER ROLL $720 TACHOMETER W/LED READ OUT FOR EASY FELD READING CAflXJ ACCURATE ENGINE RPM IECE WOOD ---- CARVING SET FOR HOBBYISTS/f \ QUICK HEAT SOLDERING GUN lWWATT 21 PIECE TOOL SET US SIZE SCREWDRIVERS PLUS PHILLIPS HEX AND WRENCH TYPES hIPLE HANDS WITH MAGNIFIER FOR EXTRA HELP IN HOLDING THOSE SMALL PARTS WHILE SOLDERING GLUING OR PAINTING 7 WITH MULTI-POSITION 39 PLEXIBLE ARM 3 DIOPTER $3o LENS FOR 4 TiMES MAGN F CAT DN mode craft HobJ MAGNIFIER LAMP cepted Editors note press time July issue AMA News arrived John Griggs Presidents Cornercolumn has information situation RMcM OnApril 13 1985theAMAFrequency Committee met all-day session AMA HQ discuss matters Among committee has proposed Exec utive Council following added RC GENERAL sect jon AMA rule book cut off future debates type 1 AMA endorses compliance FCC Regulations AMA members 2 Contest Directors may dis cretion perform tests RC systems make special RC channel use accom modations suit local conditions 3 Foreign contestants intending enter US contests foreign RC systems operating foreign RC channels should contact AMA HQ advance contest date Rule 1 should self-explanatory believe citizen should follow law recognize AMA char tered act upaid police force government authority Specifically AMA has invested authority police 72 MHz band FCC correct procedure citizen lieves another citizen breaking law complain proper authority applies whether presumed infraction driving excessive speed public intoxi cation using illegal radio transmitter proper place complain about illegal radios local Field Service Engineer Office FCC should note AMA President John C Grigg stated policy Type Ac ceptance stickers RC transmitters January 1985 issue MA Competition Newsletter page 115 Attention RC Fliers withdrew policy Presidents Corner column AMA News forMarch 1985 alsoMA page 93 AMAs legal counsel Jeremiah Court ney advised thatonly FCC Type Accepted Type Approved equipment may used legally 72 MHz frequencies should read about John Wrths column Model Aviation June 1985 page 100 would interesting compare references Minute XV AMA Executive Council meeting reported page 100 May 1985 issue MA Rule 2 specifically allows CDs check contestants assurances fre quency flag match RC system has appropriate performance char acteristics well things like tie together groups frequency pins pro hibit use specific channels deal local interference problems also gives CD authority setup flight lines trans mitter impound areas and/or make what ever RC channel use procedures deems appropriate situation Rule 3 allows such situations World Cup competition might expect have European contestants op erating 35 40 MHz channels AMA HQ can usually get waiver FCC such uses would include waiver need Type Acceptance However very important waiver doesnt guarantee non-interference Foreign competitors must operate under same Secondary User restrictions about Canadians con sidering Canadians US contests discussed last month have long history reciprocal usage mean let us use RC channels Canada let use US A$A Executive Director John Worth says reciprocity official time havent told revoked cant prove still effect either issue bit clouded first place never got permission FCC use 72720 72760 72800 72840 MHz Canadians did get permission government still use have tie clip 72720 RC46 72760 RC48 72800 RCSO 72840 RC52 let Canadians use frequencies Next Canadians chose activate interstitial channels 7201 7203 7205. MHz rather fol low AMA Phase-In Plan puts Canadian RC channels 20 kHz spac ingas intended 1991 AMA Phase-In Plan designed protect old equipment long possible Canadian Plan apparently designed press Narrow-Band Equipment Now position seem getting pushed AM/FM con troversy fly Canada pay attention clip board because its different Ill bet Kraft Synthesizer very popular along border following formulas converting between RC channel number cor responding frequency MHz may interest fly Canadians 1 Frequency MHz hannel number O 2 RC Channel number 50Frequency MHz See much easier everyone just uses RC channel numbers Last-minute flash New Flag proposal now think should called Narrow-Band Flag accepted passed Executive Council Watch details Competition Newsletter George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY August 1985 41
Edition: Model Aviation - 1985/08
Page Numbers: 36, 37, 38, 41
Radio Technique George M WHO IS RESPONSIBLE RC transaiitter AMA acting its ca pacity National Representative Aero modeling United States has two missions 1 promote aeromodeling 2 keep records performing missions AMA does following 1 Advertises bene fits model aviation accomplish ments AMA members 2 Codifies publishes rules competition 3 Sanc tions contests conducted members 4 Conducts national international con tests 5 Homologates certifies records both nationwide worldwide homologating records sometimes necessary certify characteristics equipment used competition Indi vidual Contest Directors required example certify physical dimensions model essential compe tition such total weight wing area displacement engines etc re quired consider RC system thing Contest Director has required to assure RC system used sanctioned competition car ries appropriate AMA-designated RC channel identification flag Official Model Aircraft Regulations 1984-85 edition pp 128 129 special events like Class RC Saliplanes CD has monitor RC system used ie Rudder Elevator Aileron Elevator important point has always still remains responsibility contestant assure AMA contest organizers other con testants radio proposes use AMA-sanctioned competition operating frequency designated flag its antenna has technical characteristics required Federal Communications Commission FCC situation same RC flying done away contest persons RC system interferes another persons RC system accident oc curs result interference fault liability may belong operator offending transmitter operator receiver being interfered neither both However accidents another matter Accidents happen AMA has arranged liability insurance can still friends after occurs Contest Directors assume responsi bility conduct safe contest within limits rule book prudent activities what justifies writing AMA Safety Code page 133 rule book writing rules like pull tests Control Line models Though isnt written down rule RC contestants depend Contest Directors good judgement organize activities no two contestants asked operate particular RC channel same time commonsense safety re quirement use transmitter impound areas frequency-clip boards RF monitors also strongly recommended AMA required page 129 rule book again may wonder required answer safety members business says AMA Member Responsibility section rule bookright page 1 possible operate safely frequen cy-clip boards etc AMA willingto accept method works Providing service contestants group AMA representatives may discretion ask permission check electromagnetic performance RC system presented use AMAsanctioned contest contestant may re fuse permit check Contest Director can refuse accept person contest AMA will back CD arguments type key prudence prudent ask such 36 Model Aviation Alrtronics scanneror couple other similar devIcesare Contest Director needs verify transmitters operatIng frequency matches frequency fiag Its antenna ciub should have least monitor transmitter check check asked contestants becomes mem bers responsibility comply withdraw event usual reason checking transmit ters confirm frequency emitted transmitter matches flag its antenna Nats sometimes find two dont doesnt rule out checks other reasons such spurious emissions CD has reason suspect contestants transmitter malfunc tioning CD has right check common good having checked CD must check because other transmitters maybe causing interference course may also re ceiver problem flag frequency/check can made device simple scanner elaborate tests approaching FCC Type Acceptance procedures necessary emphasis particular see no reason procedure re quires RC system disassembled opened inspection way engine inspector RC Pylon Racing CL Speed/Racing events opens up engine apply micrometers other inspection tools Dan Kahn showed up 1983 Nats elaborate test setup purpose collect data AMA Frequency Committee could assess peculiar new situationour first large use new old RC channels together Having assessed transmitters performances scientifically estab lished credible database CD Gene Shelkey gave us test Gene used eight winches keep average 16 Sailplanes air simultaneously two contest days no complaints mod eler-to-modeler RC interference con cluded AMA Phase-In Plan suitable way deal new RC channels preserving use old equip ment main point consider time virtually radio used 1983 AM type RC channel spacing 40 kHz 72 MHz band 1985 Nats will present new situation expect 75% RC systems present will new since 1983 Further expect will large number PCM-type sets use least half transmitters will operate FM things go planned may again elaborate test setup build support new data base will show well current crop FM systems gets along older AM systemsand Since receiver operation primary concern new situation work ing device very sensitive antenna can placed alongside airplane record power spectral den sity receivers local oscillator find anomalies later correlate modeler-to-modeler interference formation will passed manufac turers will done promote safe RC aeromodeling speculation part bear quote answer readers tale Helicopters glitches crashes frustration particular FM set letter written Mr Cecil Bell 144 Holm Rd #14 Watsonville CA 95076 Heres what said letter typical others Best suggestion point request manufacturer replace FM transmitter module receiver Continued pare 38 August 1985 37 frequency monitor built John Lange now member AMA Fre quency Committee donated AMA have tune hand its capable monitoring RC channeis Ham 72 MHz 75 MHz bandsas weli checking whats going cracks between RC channeis Chartered ciubs can request twoweek ioan equipment contacting AMA HO Although panei monitor prociaims Reaiistic Radio Shack unit its actuaiiy one-ofa-kind device capabie monitoring aii 72 75 MHz channeis automaticaiiy can programmed iook channeis close together 5 kHzI too avaiia bie Chartered clubs two-week ioan AMA HOexcept being used big AMA events iike Nats Being compieteiy automatic equipped tape recorder output can ieft entireiy unattended trap intermittent interferences tape recorder has VOX automatic start mike picks up sound feature tape wiii oniy record interference present vaiuabie timecompression tooi searching something dont reaiiy know oak Works 110 voits C 12 voits DC MORE NEW KITS FROM 114 TWO DESIGNED FOR 05 ELECTRIC POWER RQIN SPORT SCALE 54 S PA N 425 sq AREA $4495 C4& BILL WINTER design 58 SPAN 490 sqAREA $4795 AND TWO COMPETITION SAILPLANES PROPHET 941 995 SPAN 941 sqAREA 60-65 az/sq WING LOADING $9995 PROPHET TWO METER 631 sqAREA 65-70 az/sq WING LOADING $5395 h DAVEY EUSYSTEMS U CORPORATION ONE WOOD LANEMALVERNPA19355 215644-6772 DEALER INQUIRIES INVITED YOUR SOURCE FOR HISTARTS THE RETRIEVER WINCHES ELECTRIC MO TORS AND OTHER QUIET FLIGHT SUPPLIES AM version have stock would expect will cost around $100 per radio system might satisfy description lutions found similar problems dif ficuty single-conversion FM re ceiver could its S042P chip RC sys tem-designers have told its mixer section just isnt good enough 72 MHz FM defect showed up rather clearly production units went service Most likely prototypes worked better because engineers technicians con centrated making work have heard generic S042P 5044 5045 chips now being used just arent good original branded manufacturers products RC manufactur ers just upset situation Use generic chips may explain some radios lose just channel everything else seems check out OK Since Im guessing receiver problem second alternative might replace current FM receiver true narrow-band FM receiver someone else manufacturer will have soon Ive told already have narrow-band receiver PCM system havent actually seen Futaba Kraft Airtronics have narrowband receivers PCM already others such Ace R/G have announced intentions offer Initially price true narrow-band receiver may over $100 FM isnt inherently poorer AM has done right folks remember what commercial FM radio like back 1 950s doreceivers drifted like boat strong wind remember add voltage regulator tube expensive Hi-Fi kit tuner stop drifting Today $10 pocket FM radio drift-free problem now create narrow-band design RC works Dont give up Helicopters experts crash will reach point crashes due wearout outside influences dont feel upset navy some pity poor CD Re cently dispute erupted over foreignmade RC system operated AIvIA member F3B team trials reported system question operating properly FCC-desig nated AMA-sanctioned RC channel bore appropriate flag facts CD could have no objection use RC system Another modeler entered trials protested RC system question Type Accepted FCC therefore should disqualified competition Contest Direc tor disagreed nothing 1984-85 AMA rule book about disquali fying transmitters Type AcContinued page 41 38 Model Aviation mndd craft T TOUCH UP AIR BRUSH FOR DETAIL PAINTING OF AIRPLANE WINGS $4O ARISTO TEX COVERING MATERIAL NEW AND THE REST YET CONTOURS BETTER WITH RICH COLORS BETTER STICKAND FUEL RES STAN BLUE BLACK ORANGE F GREEN OGE YEL OW 2 METER ROLL $720 TACHOMETER W/LED READ OUT FOR EASY FELD READING CAflXJ ACCURATE ENGINE RPM IECE WOOD ---- CARVING SET FOR HOBBYISTS/f \ QUICK HEAT SOLDERING GUN lWWATT 21 PIECE TOOL SET US SIZE SCREWDRIVERS PLUS PHILLIPS HEX AND WRENCH TYPES hIPLE HANDS WITH MAGNIFIER FOR EXTRA HELP IN HOLDING THOSE SMALL PARTS WHILE SOLDERING GLUING OR PAINTING 7 WITH MULTI-POSITION 39 PLEXIBLE ARM 3 DIOPTER $3o LENS FOR 4 TiMES MAGN F CAT DN mode craft HobJ MAGNIFIER LAMP cepted Editors note press time July issue AMA News arrived John Griggs Presidents Cornercolumn has information situation RMcM OnApril 13 1985theAMAFrequency Committee met all-day session AMA HQ discuss matters Among committee has proposed Exec utive Council following added RC GENERAL sect jon AMA rule book cut off future debates type 1 AMA endorses compliance FCC Regulations AMA members 2 Contest Directors may dis cretion perform tests RC systems make special RC channel use accom modations suit local conditions 3 Foreign contestants intending enter US contests foreign RC systems operating foreign RC channels should contact AMA HQ advance contest date Rule 1 should self-explanatory believe citizen should follow law recognize AMA char tered act upaid police force government authority Specifically AMA has invested authority police 72 MHz band FCC correct procedure citizen lieves another citizen breaking law complain proper authority applies whether presumed infraction driving excessive speed public intoxi cation using illegal radio transmitter proper place complain about illegal radios local Field Service Engineer Office FCC should note AMA President John C Grigg stated policy Type Ac ceptance stickers RC transmitters January 1985 issue MA Competition Newsletter page 115 Attention RC Fliers withdrew policy Presidents Corner column AMA News forMarch 1985 alsoMA page 93 AMAs legal counsel Jeremiah Court ney advised thatonly FCC Type Accepted Type Approved equipment may used legally 72 MHz frequencies should read about John Wrths column Model Aviation June 1985 page 100 would interesting compare references Minute XV AMA Executive Council meeting reported page 100 May 1985 issue MA Rule 2 specifically allows CDs check contestants assurances fre quency flag match RC system has appropriate performance char acteristics well things like tie together groups frequency pins pro hibit use specific channels deal local interference problems also gives CD authority setup flight lines trans mitter impound areas and/or make what ever RC channel use procedures deems appropriate situation Rule 3 allows such situations World Cup competition might expect have European contestants op erating 35 40 MHz channels AMA HQ can usually get waiver FCC such uses would include waiver need Type Acceptance However very important waiver doesnt guarantee non-interference Foreign competitors must operate under same Secondary User restrictions about Canadians con sidering Canadians US contests discussed last month have long history reciprocal usage mean let us use RC channels Canada let use US A$A Executive Director John Worth says reciprocity official time havent told revoked cant prove still effect either issue bit clouded first place never got permission FCC use 72720 72760 72800 72840 MHz Canadians did get permission government still use have tie clip 72720 RC46 72760 RC48 72800 RCSO 72840 RC52 let Canadians use frequencies Next Canadians chose activate interstitial channels 7201 7203 7205. MHz rather fol low AMA Phase-In Plan puts Canadian RC channels 20 kHz spac ingas intended 1991 AMA Phase-In Plan designed protect old equipment long possible Canadian Plan apparently designed press Narrow-Band Equipment Now position seem getting pushed AM/FM con troversy fly Canada pay attention clip board because its different Ill bet Kraft Synthesizer very popular along border following formulas converting between RC channel number cor responding frequency MHz may interest fly Canadians 1 Frequency MHz hannel number O 2 RC Channel number 50Frequency MHz See much easier everyone just uses RC channel numbers Last-minute flash New Flag proposal now think should called Narrow-Band Flag accepted passed Executive Council Watch details Competition Newsletter George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY August 1985 41
