ABSTRACT Transmitter stickers required De cember 1990 Listing Airtronics narrow-band receivers Airtronics exchange policy FM XTAL swapping Glossary FINALLY AMA Executive Council voted October 20 Reston meeting require Gold Silver stickers transmitters presented en try AMA-sanctioned events commencing December 20 1990 See announcement page 135 month s Competition Newsletter RlVfcM As write months column June 30 1988 have neither seen nor heard EC approved list repair stations service centers qualified install Gold/Silver stickers trans mitters nor have seen EC-approved state ment what qualifying standards AMA Guidelines call use suitably cali brated spectrum analyzer requirement has cause some dispute testing trans mitter compliance people have putting RCMA/AMA stickers 1988 have access spectrum analyzer Narrow-band systems available now Airtron ics Inc offers new line super narrow-band Gold label receivers US Canada Airtronics also first manufacturer submit independent laboratory test results AMA HQ demonstrate both new receiver transmitter modules meet and/or exceed AMA Guidelines narrow band 1991 later performance best part narrow-band receivers matching transmitter modules being made available owners ex isting wideband Airtronics equipment Isnt what predicted last year Editors note Lists certified Airtronics equipment published October No vember 1988 editions AMA News RMcM lot information follows Ill try keep simple First understand talking about FM receiver design dual-conversion superheterodyne receiver meets AMA Guidelines narrow-band performance can called 1991 design design being produced several forms identified unique stock numbers Well get reasons go along 92985 PCM 8-channel receiver has extra PC board contains PCM com puter item supplied Quantum PCM 8P P stands transmitter config ured powered airplane 8H H stands transmitter configured Helicopter same receiver supplied Spectra PCM 7P 7H 7-channel transmit ters 92965 PCM 6-channel receiver contains low-voltage fallsafe F plug has ex tra PC board PCM computer usable Vanguard FM/PCM 6-channel 4channel transmitters Note Vanguard FM/PCM transmitter switchable generate either FM pulse-width modulation PWM FM pulse-code modulation PCM 92965 will work transmitter used PCM mode 92785 FM PWM 8-channel receiver sup plied Module series works MD7P 7H1 7H 75P SR XL Championship FM transmitters SP stands transmitterconfigured Sailplanes has group special mixers re ceiver used ATRCS computer-radio sys tem described Mark Triebes RC Slope Soar ing column September 1988 issue page 47 Byron Blakeslecs RC Soaring col umn August 1988 issue page 54 92765 FM PWM 6-channel receiver us able Vanguard FM 6- 4-channel transmitters well new Vanguard FM/PCM transmitters FM ie PWM mode can also used older SR XL Championship FM units converted AM units Airtronics Trade-In Policy According information provided Jack Albrecht Customer Relations Manager Airtronics Inc works 1 exchange program send transmitter RF module its matching receiver saves postage 2 will receive new Gold-sticker RF mo dule new receiver above list has aligned transmitter module new frequency flag 3 XL CS SR series Convert XMTR AM FM provide matching FM receiver$7495 &S handling ship pingRMcM 4 XL CS Module series FM sets a Provide align XMTR module new FM receiver existing channel $5995 &S b Same thing change new channel $6995 &S 5 Vanguard Convert narrow-band FM $5995 &S Note change must return complete transmitter receiver Pack big box avoid next step remove back transmitter case 1 taking two screws bottom pressing bottom edge case both outward upward same time last step disassembly process R comes remove RF module pull ing straight rear Remember force thingsl wont come out forgot remove crystal first 34 Model Aviation GeorgeM Mye D Radio Thchnique 70 Froelilldi Fm Rd Hldcsvlfle NY 11801 Sending transmitter RF module crys tal receiver manufacturer narrow-band swap First step remove transmitter crystal its sidemounted type shown damage sticks switch handles 6 customer returns entire system will assumed complete system checkout wanted charges will increased necessary should noted Airtronics service maintenance center located California technicians Americans live LA area factory trained re pair maintenance Airtronics radios checkouts accomplished factory tooling Airtronics Inc 11 Autry Irvine CA 92718 may have noticed above re fers FM sets exchanging receivers transmitter modulesbut interchang ing crystals field reason FM sets must carefully aligned fre quency deviation after crystals swapped cause FM receivers measure frequency deviation pair transmitter/receiver crystals will exhibit unique difference between transmit ter receiver crystal frequencies An FM re ceiver usually can aligned accommodate difference great defies alignment other crystal pairs can tried shop Since unique frequency difference will found other pair crystals make swap field control signal can fall completely outside receivers pass-band enough side transmitters sig nal received distorted fashion ef fect critical itself becomes critical effects narrow-banding included Airtronics Inc wants discourage thoughts swapping FM crystals field ie using proper laboratory shop equipment verify resulting performance though FCC regulations may permit con sumer XTAL-swapping Glossary time time have accused using too acronyms answer criticism present glossary terms use frequently use same reason Government uses themto minimize word-count use self-glorifying labels some people sign things AM Amplitude Modulationa system im pressing information radio frequency trans mission adding manner varies amplitude voltage assigned radio fre quency intelligible manner case RC systems models added information form string square wave pulses effectively switch radio frequency On/OffContinued page 153 YONE CAN FLY THE WATE B/C HELICOPTER. e corn- ON YOURC plete novice 10 Ihe lds best the ________ Radio Control Helicopter Simulator IBM P s compatbie computers designed give youatasteotRlChelicopterswShoutthetimeand ex pense Wah justatew simple keystrokes can configure own helicopter over 180 billion different combinations possble Imagine flying inches off ground wthout having worry about costly engine radio failure Loop roll fy inverted wthout having spend adjust lk*ages S SHIPPED DAY RECEIVED WARBIRD VIDEOS VHS OR BETA ANY TWO VIDEOS ONLY $7595 ANY 3 VIDEOS ONLY $10795 SPE6IAL IWTRO6T6RY OFFER ALL 6 VIDEOS ONLY $19995 WARBIRD CHECKOUT VOL 1 Flying P-40 Warhawk Corsair Hellcat SB2-A Buccanneer Avenger NF 1325 Programs2 Hr Only $3995 WARBIRD CHECKOUT VOL II Flying P-38 Mitchell Bomber P61 Black Widow Invader NF 1454 Programsi 00 Mm Only $3995 WARBIRD CHECKOUT VOL 111 Flying P-51 MustangThe A-20 Bomber P-39 Introduction P-39 Advanced NF 1514 Programslb Mm Only $3995 MODERN JET FIGHi Flying F/A18 Hornet Eagle Th F1A end FI6C ndThhirdsF16s nuary 1989 35 Pack transmitter RF module transmitter crystal receiver carefully box big enough wont lost mail would helpful pack identifica tion inside box tool Make sure spec ify what want done Dont make peo ple try read mind WARBIRD CHECKOUT VOL IV Flying P-47 3 parts Flying T-6 3 parts N1 1366 Programslb Mm Only $3995 WARBIRD CHECKOUT VOL V Flying 6-29 Pre-Flight BI7E Pre-Flight 6-24 NF 1553 Programs107 Mm Only $3995 CALLTOLL FREE IT CARDS Liz Seagull/Byrum Continued page 149 presents no special problems parts should carefully sanded primed before assembly stringers canopy used basswood available railroad section hobby shop After covering priming fuselage finishing cockpit interior canopy glazed 015 clear plastic Sig Wil holds RC-56 very good adhesive taching canopy stabilizer fin covered Parsons brand fiberglass before being joined fuselage Glass cloth also used wing fairing interplane struts wheel pants wooden surface covered fabric Dan Parsons has very good set instructions will send cloth method much easier infinitely lighter old poly ester method Open framework should covered Super Coverite primed nitrate dope sprayed avoid brush stroke marks used Sig Superoote clear nitrate dope followed col ored butyrate dope Apply several coats rub down steel wool magnet will remove small steel particles re main Supercote silver particularly tractive color heavily pigmented Before flying model check radio power off engine running full throffle good practice also make power check using smaller prop youll flying ap proximates in-flight higher rpm 25 lb Seagull takes off about 100 ft no wind Rudder response dur ing takeoff very good launches smooth graceful landing technique try hold foot off runway ap plying more up elevator air plane slows down until finally settles itself dont always succeed I get nice landing interest encouragement Bill Winter acknowledged appreciated Also advice library staff National Aviation Space Museum Washington DC very helpful lads very very knowledgeable helped make day spent doing re search Seagull best life written Seagull 25 flights flight emo tional experience Hope enjoy yours well Radio Technique/Myers Continued page 35 AMA Academy Model Aeronautics National organization aeromodelers member NAA representative United States America negotiations world pub lisher Model Aviation magazine EAA Experimental Aircraft Association National organization builders homemade man-carrying aircraft Frequent users RC mod els investigate verify performance air craft designs EC Executive CouncilGovermng body AMA consisting President Executive Vice-President Executive Director 11 Dis trict Vice-Presidents FAA Federal Aviation Administrationpart US Federal Government charged regulating transportation use air above nation FAI Federation Aeronautique Internationale Organization oversees coordinates aerospace competitions records based Paris France FC Frequency CommitteeAdvisory body AMA Executive Council matters pertain ing obtaining using radio frequencies hobby purposes FCC Federal Communications Commission part US Federal Government charged regulating radio frequency transmissions FM frequency modulationa system im pressing information radio frequency trans mission adding information moves assigned radio frequency intelligible man ner FSK frequency-shift keyinga system im pressing information radio frequency trans mission shifting between two radio frequen cies intelligible manner system actually used RC systems described FM systems HQ headquartersin case AMA lo cated 1810 Samuel Morse Drive Reston VA 22090 NAA National Aeronautic Association members include EAA AMA other US aviation associations US national aero club recognized FAI PC printed circuita method connecting electronic components etched copper foil path ways PCM pulse-code modulationa system encoding modulation radio frequency use computer words can decoded control commands computer receiver PWM pulse-width modulationa system encoding modulation radio frequency uses time between pulses analog desired control position system common system years 1969-1988 RC sometimes RIC radio-controlled Describes systems human commands delivered machines way radio link RF radio frequencypertains systems generate electromagnetic radiations ra dio frequencies RFI fradio frequency interferenceany elec tromagnetic radiation degrades radio link RC system RXradio receiver XM7Rradio transmitter XTAL sometimes XTL crystalcommon frequency-determining element XMTR RX Battery/Smith Continued page 36 Making use dual battery system relatively simple does entail adding negative positive lead receiver connector supply current Generally existing power connector built receiver can used servo power supply receivers experience Great Performance Quartet x DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins U SPAN 76 EXTRA 230 WING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors available direct select hobby shops - ZEMPRO MARKETING I- PO BOX 3076 OAK RIDGE TN 37830 PHONE 6154826188 January 1989 153 CHIPMUNK 850 SPAN 70 insWING AREA 850 sq ins ZLIN 526 SPAN 72 insWING AREA 900 sq ins
Edition: Model Aviation - 1989/01
Page Numbers: 34, 35, 153
ABSTRACT Transmitter stickers required De cember 1990 Listing Airtronics narrow-band receivers Airtronics exchange policy FM XTAL swapping Glossary FINALLY AMA Executive Council voted October 20 Reston meeting require Gold Silver stickers transmitters presented en try AMA-sanctioned events commencing December 20 1990 See announcement page 135 month s Competition Newsletter RlVfcM As write months column June 30 1988 have neither seen nor heard EC approved list repair stations service centers qualified install Gold/Silver stickers trans mitters nor have seen EC-approved state ment what qualifying standards AMA Guidelines call use suitably cali brated spectrum analyzer requirement has cause some dispute testing trans mitter compliance people have putting RCMA/AMA stickers 1988 have access spectrum analyzer Narrow-band systems available now Airtron ics Inc offers new line super narrow-band Gold label receivers US Canada Airtronics also first manufacturer submit independent laboratory test results AMA HQ demonstrate both new receiver transmitter modules meet and/or exceed AMA Guidelines narrow band 1991 later performance best part narrow-band receivers matching transmitter modules being made available owners ex isting wideband Airtronics equipment Isnt what predicted last year Editors note Lists certified Airtronics equipment published October No vember 1988 editions AMA News RMcM lot information follows Ill try keep simple First understand talking about FM receiver design dual-conversion superheterodyne receiver meets AMA Guidelines narrow-band performance can called 1991 design design being produced several forms identified unique stock numbers Well get reasons go along 92985 PCM 8-channel receiver has extra PC board contains PCM com puter item supplied Quantum PCM 8P P stands transmitter config ured powered airplane 8H H stands transmitter configured Helicopter same receiver supplied Spectra PCM 7P 7H 7-channel transmit ters 92965 PCM 6-channel receiver contains low-voltage fallsafe F plug has ex tra PC board PCM computer usable Vanguard FM/PCM 6-channel 4channel transmitters Note Vanguard FM/PCM transmitter switchable generate either FM pulse-width modulation PWM FM pulse-code modulation PCM 92965 will work transmitter used PCM mode 92785 FM PWM 8-channel receiver sup plied Module series works MD7P 7H1 7H 75P SR XL Championship FM transmitters SP stands transmitterconfigured Sailplanes has group special mixers re ceiver used ATRCS computer-radio sys tem described Mark Triebes RC Slope Soar ing column September 1988 issue page 47 Byron Blakeslecs RC Soaring col umn August 1988 issue page 54 92765 FM PWM 6-channel receiver us able Vanguard FM 6- 4-channel transmitters well new Vanguard FM/PCM transmitters FM ie PWM mode can also used older SR XL Championship FM units converted AM units Airtronics Trade-In Policy According information provided Jack Albrecht Customer Relations Manager Airtronics Inc works 1 exchange program send transmitter RF module its matching receiver saves postage 2 will receive new Gold-sticker RF mo dule new receiver above list has aligned transmitter module new frequency flag 3 XL CS SR series Convert XMTR AM FM provide matching FM receiver$7495 &S handling ship pingRMcM 4 XL CS Module series FM sets a Provide align XMTR module new FM receiver existing channel $5995 &S b Same thing change new channel $6995 &S 5 Vanguard Convert narrow-band FM $5995 &S Note change must return complete transmitter receiver Pack big box avoid next step remove back transmitter case 1 taking two screws bottom pressing bottom edge case both outward upward same time last step disassembly process R comes remove RF module pull ing straight rear Remember force thingsl wont come out forgot remove crystal first 34 Model Aviation GeorgeM Mye D Radio Thchnique 70 Froelilldi Fm Rd Hldcsvlfle NY 11801 Sending transmitter RF module crys tal receiver manufacturer narrow-band swap First step remove transmitter crystal its sidemounted type shown damage sticks switch handles 6 customer returns entire system will assumed complete system checkout wanted charges will increased necessary should noted Airtronics service maintenance center located California technicians Americans live LA area factory trained re pair maintenance Airtronics radios checkouts accomplished factory tooling Airtronics Inc 11 Autry Irvine CA 92718 may have noticed above re fers FM sets exchanging receivers transmitter modulesbut interchang ing crystals field reason FM sets must carefully aligned fre quency deviation after crystals swapped cause FM receivers measure frequency deviation pair transmitter/receiver crystals will exhibit unique difference between transmit ter receiver crystal frequencies An FM re ceiver usually can aligned accommodate difference great defies alignment other crystal pairs can tried shop Since unique frequency difference will found other pair crystals make swap field control signal can fall completely outside receivers pass-band enough side transmitters sig nal received distorted fashion ef fect critical itself becomes critical effects narrow-banding included Airtronics Inc wants discourage thoughts swapping FM crystals field ie using proper laboratory shop equipment verify resulting performance though FCC regulations may permit con sumer XTAL-swapping Glossary time time have accused using too acronyms answer criticism present glossary terms use frequently use same reason Government uses themto minimize word-count use self-glorifying labels some people sign things AM Amplitude Modulationa system im pressing information radio frequency trans mission adding manner varies amplitude voltage assigned radio fre quency intelligible manner case RC systems models added information form string square wave pulses effectively switch radio frequency On/OffContinued page 153 YONE CAN FLY THE WATE B/C HELICOPTER. e corn- ON YOURC plete novice 10 Ihe lds best the ________ Radio Control Helicopter Simulator IBM P s compatbie computers designed give youatasteotRlChelicopterswShoutthetimeand ex pense Wah justatew simple keystrokes can configure own helicopter over 180 billion different combinations possble Imagine flying inches off ground wthout having worry about costly engine radio failure Loop roll fy inverted wthout having spend adjust lk*ages S SHIPPED DAY RECEIVED WARBIRD VIDEOS VHS OR BETA ANY TWO VIDEOS ONLY $7595 ANY 3 VIDEOS ONLY $10795 SPE6IAL IWTRO6T6RY OFFER ALL 6 VIDEOS ONLY $19995 WARBIRD CHECKOUT VOL 1 Flying P-40 Warhawk Corsair Hellcat SB2-A Buccanneer Avenger NF 1325 Programs2 Hr Only $3995 WARBIRD CHECKOUT VOL II Flying P-38 Mitchell Bomber P61 Black Widow Invader NF 1454 Programsi 00 Mm Only $3995 WARBIRD CHECKOUT VOL 111 Flying P-51 MustangThe A-20 Bomber P-39 Introduction P-39 Advanced NF 1514 Programslb Mm Only $3995 MODERN JET FIGHi Flying F/A18 Hornet Eagle Th F1A end FI6C ndThhirdsF16s nuary 1989 35 Pack transmitter RF module transmitter crystal receiver carefully box big enough wont lost mail would helpful pack identifica tion inside box tool Make sure spec ify what want done Dont make peo ple try read mind WARBIRD CHECKOUT VOL IV Flying P-47 3 parts Flying T-6 3 parts N1 1366 Programslb Mm Only $3995 WARBIRD CHECKOUT VOL V Flying 6-29 Pre-Flight BI7E Pre-Flight 6-24 NF 1553 Programs107 Mm Only $3995 CALLTOLL FREE IT CARDS Liz Seagull/Byrum Continued page 149 presents no special problems parts should carefully sanded primed before assembly stringers canopy used basswood available railroad section hobby shop After covering priming fuselage finishing cockpit interior canopy glazed 015 clear plastic Sig Wil holds RC-56 very good adhesive taching canopy stabilizer fin covered Parsons brand fiberglass before being joined fuselage Glass cloth also used wing fairing interplane struts wheel pants wooden surface covered fabric Dan Parsons has very good set instructions will send cloth method much easier infinitely lighter old poly ester method Open framework should covered Super Coverite primed nitrate dope sprayed avoid brush stroke marks used Sig Superoote clear nitrate dope followed col ored butyrate dope Apply several coats rub down steel wool magnet will remove small steel particles re main Supercote silver particularly tractive color heavily pigmented Before flying model check radio power off engine running full throffle good practice also make power check using smaller prop youll flying ap proximates in-flight higher rpm 25 lb Seagull takes off about 100 ft no wind Rudder response dur ing takeoff very good launches smooth graceful landing technique try hold foot off runway ap plying more up elevator air plane slows down until finally settles itself dont always succeed I get nice landing interest encouragement Bill Winter acknowledged appreciated Also advice library staff National Aviation Space Museum Washington DC very helpful lads very very knowledgeable helped make day spent doing re search Seagull best life written Seagull 25 flights flight emo tional experience Hope enjoy yours well Radio Technique/Myers Continued page 35 AMA Academy Model Aeronautics National organization aeromodelers member NAA representative United States America negotiations world pub lisher Model Aviation magazine EAA Experimental Aircraft Association National organization builders homemade man-carrying aircraft Frequent users RC mod els investigate verify performance air craft designs EC Executive CouncilGovermng body AMA consisting President Executive Vice-President Executive Director 11 Dis trict Vice-Presidents FAA Federal Aviation Administrationpart US Federal Government charged regulating transportation use air above nation FAI Federation Aeronautique Internationale Organization oversees coordinates aerospace competitions records based Paris France FC Frequency CommitteeAdvisory body AMA Executive Council matters pertain ing obtaining using radio frequencies hobby purposes FCC Federal Communications Commission part US Federal Government charged regulating radio frequency transmissions FM frequency modulationa system im pressing information radio frequency trans mission adding information moves assigned radio frequency intelligible man ner FSK frequency-shift keyinga system im pressing information radio frequency trans mission shifting between two radio frequen cies intelligible manner system actually used RC systems described FM systems HQ headquartersin case AMA lo cated 1810 Samuel Morse Drive Reston VA 22090 NAA National Aeronautic Association members include EAA AMA other US aviation associations US national aero club recognized FAI PC printed circuita method connecting electronic components etched copper foil path ways PCM pulse-code modulationa system encoding modulation radio frequency use computer words can decoded control commands computer receiver PWM pulse-width modulationa system encoding modulation radio frequency uses time between pulses analog desired control position system common system years 1969-1988 RC sometimes RIC radio-controlled Describes systems human commands delivered machines way radio link RF radio frequencypertains systems generate electromagnetic radiations ra dio frequencies RFI fradio frequency interferenceany elec tromagnetic radiation degrades radio link RC system RXradio receiver XM7Rradio transmitter XTAL sometimes XTL crystalcommon frequency-determining element XMTR RX Battery/Smith Continued page 36 Making use dual battery system relatively simple does entail adding negative positive lead receiver connector supply current Generally existing power connector built receiver can used servo power supply receivers experience Great Performance Quartet x DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins U SPAN 76 EXTRA 230 WING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors available direct select hobby shops - ZEMPRO MARKETING I- PO BOX 3076 OAK RIDGE TN 37830 PHONE 6154826188 January 1989 153 CHIPMUNK 850 SPAN 70 insWING AREA 850 sq ins ZLIN 526 SPAN 72 insWING AREA 900 sq ins
Edition: Model Aviation - 1989/01
Page Numbers: 34, 35, 153
ABSTRACT Transmitter stickers required De cember 1990 Listing Airtronics narrow-band receivers Airtronics exchange policy FM XTAL swapping Glossary FINALLY AMA Executive Council voted October 20 Reston meeting require Gold Silver stickers transmitters presented en try AMA-sanctioned events commencing December 20 1990 See announcement page 135 month s Competition Newsletter RlVfcM As write months column June 30 1988 have neither seen nor heard EC approved list repair stations service centers qualified install Gold/Silver stickers trans mitters nor have seen EC-approved state ment what qualifying standards AMA Guidelines call use suitably cali brated spectrum analyzer requirement has cause some dispute testing trans mitter compliance people have putting RCMA/AMA stickers 1988 have access spectrum analyzer Narrow-band systems available now Airtron ics Inc offers new line super narrow-band Gold label receivers US Canada Airtronics also first manufacturer submit independent laboratory test results AMA HQ demonstrate both new receiver transmitter modules meet and/or exceed AMA Guidelines narrow band 1991 later performance best part narrow-band receivers matching transmitter modules being made available owners ex isting wideband Airtronics equipment Isnt what predicted last year Editors note Lists certified Airtronics equipment published October No vember 1988 editions AMA News RMcM lot information follows Ill try keep simple First understand talking about FM receiver design dual-conversion superheterodyne receiver meets AMA Guidelines narrow-band performance can called 1991 design design being produced several forms identified unique stock numbers Well get reasons go along 92985 PCM 8-channel receiver has extra PC board contains PCM com puter item supplied Quantum PCM 8P P stands transmitter config ured powered airplane 8H H stands transmitter configured Helicopter same receiver supplied Spectra PCM 7P 7H 7-channel transmit ters 92965 PCM 6-channel receiver contains low-voltage fallsafe F plug has ex tra PC board PCM computer usable Vanguard FM/PCM 6-channel 4channel transmitters Note Vanguard FM/PCM transmitter switchable generate either FM pulse-width modulation PWM FM pulse-code modulation PCM 92965 will work transmitter used PCM mode 92785 FM PWM 8-channel receiver sup plied Module series works MD7P 7H1 7H 75P SR XL Championship FM transmitters SP stands transmitterconfigured Sailplanes has group special mixers re ceiver used ATRCS computer-radio sys tem described Mark Triebes RC Slope Soar ing column September 1988 issue page 47 Byron Blakeslecs RC Soaring col umn August 1988 issue page 54 92765 FM PWM 6-channel receiver us able Vanguard FM 6- 4-channel transmitters well new Vanguard FM/PCM transmitters FM ie PWM mode can also used older SR XL Championship FM units converted AM units Airtronics Trade-In Policy According information provided Jack Albrecht Customer Relations Manager Airtronics Inc works 1 exchange program send transmitter RF module its matching receiver saves postage 2 will receive new Gold-sticker RF mo dule new receiver above list has aligned transmitter module new frequency flag 3 XL CS SR series Convert XMTR AM FM provide matching FM receiver$7495 &S handling ship pingRMcM 4 XL CS Module series FM sets a Provide align XMTR module new FM receiver existing channel $5995 &S b Same thing change new channel $6995 &S 5 Vanguard Convert narrow-band FM $5995 &S Note change must return complete transmitter receiver Pack big box avoid next step remove back transmitter case 1 taking two screws bottom pressing bottom edge case both outward upward same time last step disassembly process R comes remove RF module pull ing straight rear Remember force thingsl wont come out forgot remove crystal first 34 Model Aviation GeorgeM Mye D Radio Thchnique 70 Froelilldi Fm Rd Hldcsvlfle NY 11801 Sending transmitter RF module crys tal receiver manufacturer narrow-band swap First step remove transmitter crystal its sidemounted type shown damage sticks switch handles 6 customer returns entire system will assumed complete system checkout wanted charges will increased necessary should noted Airtronics service maintenance center located California technicians Americans live LA area factory trained re pair maintenance Airtronics radios checkouts accomplished factory tooling Airtronics Inc 11 Autry Irvine CA 92718 may have noticed above re fers FM sets exchanging receivers transmitter modulesbut interchang ing crystals field reason FM sets must carefully aligned fre quency deviation after crystals swapped cause FM receivers measure frequency deviation pair transmitter/receiver crystals will exhibit unique difference between transmit ter receiver crystal frequencies An FM re ceiver usually can aligned accommodate difference great defies alignment other crystal pairs can tried shop Since unique frequency difference will found other pair crystals make swap field control signal can fall completely outside receivers pass-band enough side transmitters sig nal received distorted fashion ef fect critical itself becomes critical effects narrow-banding included Airtronics Inc wants discourage thoughts swapping FM crystals field ie using proper laboratory shop equipment verify resulting performance though FCC regulations may permit con sumer XTAL-swapping Glossary time time have accused using too acronyms answer criticism present glossary terms use frequently use same reason Government uses themto minimize word-count use self-glorifying labels some people sign things AM Amplitude Modulationa system im pressing information radio frequency trans mission adding manner varies amplitude voltage assigned radio fre quency intelligible manner case RC systems models added information form string square wave pulses effectively switch radio frequency On/OffContinued page 153 YONE CAN FLY THE WATE B/C HELICOPTER. e corn- ON YOURC plete novice 10 Ihe lds best the ________ Radio Control Helicopter Simulator IBM P s compatbie computers designed give youatasteotRlChelicopterswShoutthetimeand ex pense Wah justatew simple keystrokes can configure own helicopter over 180 billion different combinations possble Imagine flying inches off ground wthout having worry about costly engine radio failure Loop roll fy inverted wthout having spend adjust lk*ages S SHIPPED DAY RECEIVED WARBIRD VIDEOS VHS OR BETA ANY TWO VIDEOS ONLY $7595 ANY 3 VIDEOS ONLY $10795 SPE6IAL IWTRO6T6RY OFFER ALL 6 VIDEOS ONLY $19995 WARBIRD CHECKOUT VOL 1 Flying P-40 Warhawk Corsair Hellcat SB2-A Buccanneer Avenger NF 1325 Programs2 Hr Only $3995 WARBIRD CHECKOUT VOL II Flying P-38 Mitchell Bomber P61 Black Widow Invader NF 1454 Programsi 00 Mm Only $3995 WARBIRD CHECKOUT VOL 111 Flying P-51 MustangThe A-20 Bomber P-39 Introduction P-39 Advanced NF 1514 Programslb Mm Only $3995 MODERN JET FIGHi Flying F/A18 Hornet Eagle Th F1A end FI6C ndThhirdsF16s nuary 1989 35 Pack transmitter RF module transmitter crystal receiver carefully box big enough wont lost mail would helpful pack identifica tion inside box tool Make sure spec ify what want done Dont make peo ple try read mind WARBIRD CHECKOUT VOL IV Flying P-47 3 parts Flying T-6 3 parts N1 1366 Programslb Mm Only $3995 WARBIRD CHECKOUT VOL V Flying 6-29 Pre-Flight BI7E Pre-Flight 6-24 NF 1553 Programs107 Mm Only $3995 CALLTOLL FREE IT CARDS Liz Seagull/Byrum Continued page 149 presents no special problems parts should carefully sanded primed before assembly stringers canopy used basswood available railroad section hobby shop After covering priming fuselage finishing cockpit interior canopy glazed 015 clear plastic Sig Wil holds RC-56 very good adhesive taching canopy stabilizer fin covered Parsons brand fiberglass before being joined fuselage Glass cloth also used wing fairing interplane struts wheel pants wooden surface covered fabric Dan Parsons has very good set instructions will send cloth method much easier infinitely lighter old poly ester method Open framework should covered Super Coverite primed nitrate dope sprayed avoid brush stroke marks used Sig Superoote clear nitrate dope followed col ored butyrate dope Apply several coats rub down steel wool magnet will remove small steel particles re main Supercote silver particularly tractive color heavily pigmented Before flying model check radio power off engine running full throffle good practice also make power check using smaller prop youll flying ap proximates in-flight higher rpm 25 lb Seagull takes off about 100 ft no wind Rudder response dur ing takeoff very good launches smooth graceful landing technique try hold foot off runway ap plying more up elevator air plane slows down until finally settles itself dont always succeed I get nice landing interest encouragement Bill Winter acknowledged appreciated Also advice library staff National Aviation Space Museum Washington DC very helpful lads very very knowledgeable helped make day spent doing re search Seagull best life written Seagull 25 flights flight emo tional experience Hope enjoy yours well Radio Technique/Myers Continued page 35 AMA Academy Model Aeronautics National organization aeromodelers member NAA representative United States America negotiations world pub lisher Model Aviation magazine EAA Experimental Aircraft Association National organization builders homemade man-carrying aircraft Frequent users RC mod els investigate verify performance air craft designs EC Executive CouncilGovermng body AMA consisting President Executive Vice-President Executive Director 11 Dis trict Vice-Presidents FAA Federal Aviation Administrationpart US Federal Government charged regulating transportation use air above nation FAI Federation Aeronautique Internationale Organization oversees coordinates aerospace competitions records based Paris France FC Frequency CommitteeAdvisory body AMA Executive Council matters pertain ing obtaining using radio frequencies hobby purposes FCC Federal Communications Commission part US Federal Government charged regulating radio frequency transmissions FM frequency modulationa system im pressing information radio frequency trans mission adding information moves assigned radio frequency intelligible man ner FSK frequency-shift keyinga system im pressing information radio frequency trans mission shifting between two radio frequen cies intelligible manner system actually used RC systems described FM systems HQ headquartersin case AMA lo cated 1810 Samuel Morse Drive Reston VA 22090 NAA National Aeronautic Association members include EAA AMA other US aviation associations US national aero club recognized FAI PC printed circuita method connecting electronic components etched copper foil path ways PCM pulse-code modulationa system encoding modulation radio frequency use computer words can decoded control commands computer receiver PWM pulse-width modulationa system encoding modulation radio frequency uses time between pulses analog desired control position system common system years 1969-1988 RC sometimes RIC radio-controlled Describes systems human commands delivered machines way radio link RF radio frequencypertains systems generate electromagnetic radiations ra dio frequencies RFI fradio frequency interferenceany elec tromagnetic radiation degrades radio link RC system RXradio receiver XM7Rradio transmitter XTAL sometimes XTL crystalcommon frequency-determining element XMTR RX Battery/Smith Continued page 36 Making use dual battery system relatively simple does entail adding negative positive lead receiver connector supply current Generally existing power connector built receiver can used servo power supply receivers experience Great Performance Quartet x DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins U SPAN 76 EXTRA 230 WING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors available direct select hobby shops - ZEMPRO MARKETING I- PO BOX 3076 OAK RIDGE TN 37830 PHONE 6154826188 January 1989 153 CHIPMUNK 850 SPAN 70 insWING AREA 850 sq ins ZLIN 526 SPAN 72 insWING AREA 900 sq ins