Radio Control E lectrics Bob Kopski MORE Electric meets have announced Im very happy able pass along information First Fifth Annual Boeing Hawks Electric Fly-In scheduled weekend June 27-28 Hawks Kent field will low-key fun-fly format years past information can write Bernard Cawley 29838 48th Avenue South Auburn WA 98001 Next Polk County Soaring Eagles Lakeland FL have announced Second Annual Electric Fun-Fly August 1-2 Several competitive events planned Electric rules proposed 1988-89 AMA rules cycle will used See February 1987 issue MA page 129 information can CD Bill Futch 530 West Lake Wales Rd NLakeWalesFL33853telephone813 676-6740 Now really serious Electric competi tors Felix Vivas called recently told some plans Harbor Soaring Society California encourage interest participa tion FAI Electric flight group will hold single simple FAI competition Costa Mesa CA August 15-16 some very attractive cash prizes will awarded First place goes Bobs nwiy-flnlshed Davey Systems Caliph empty hereweight mere 1 4/2 oz modified bitmost obvious change rounded wing tips Cockpit aiso omitted kit box iabei Beiow exemplifies need Electric motor size specifications/ standards discussed April column says 05 moto can usedbut Confused situation might deter potential kit-purchasers Pfr r direct redu slal ncdedM r home $1000 cash down fourth place Any model compliant AMA/FAI published weight size require46 Model Aviation 05 motor shown 3 channel version ments using seven 12 Ah cells can compete Felix team manager American business end Bobs new Davey Systems Caliph Slotted holes 1/s-in Lite Ply motor mounting plate CL accommodate different locations engine-mount straps various motors mounted Keller 25/12 mounting components Center Light wooden Umount has 1/16 x 1/2-in foam cushions Sandpaper glued bottom gives nonsiip properties mount strapped Straps new technique Sullivan Goiden Rod inners 2-56 hardware clamp motor U-mount model-mounted plywood plate Note Sermos connectors Completed installation R Time wili tell Golden Rod holds up unorthodox application Electric team last year Event Director AMA-sanctioned meet understand meet closed last years team members now everyone else has chance $25 gets can contact Felix 1800 16th St Apt H310 Newport Beach CA 92663 telephone 714 645-3263 Reader reaction April column pouring mail phone Everybody voicing strong support Electric motor specifica tions/standards suggested column single negative comment has registered writer although several readers offered additional suggestions Anyway theres no question nations Electric modelers want meaningful motor ratings OK indus try EAA somethingl Unbelievable reader reaction April story about Unbelievable Motor has also hap pened surprisingly large number readers have written add potentially significant tech nical contributions high-tech marvel few examples Bob Hughley Washington state wrote describe what may brush use single-brush motor brush cast 97% pure Horsematite element found mostly around racetracks Bob feels material will react Unobtainium magnets such fashion motor operation will become virtually self-sustaining David McKeen Texas wrote suggest fantastic power-to-weight ratio Unbelievable Motor would make ideal powering rotorless Helicopters Dick Gibbs Pennsylvania wrote similarly suggest motor would ideal use new bladeless propeller infinite pitch has under development nega tive side Dick cautioned according computer analysis very tight brush clear ances required such motor would dictate few three out-of-round electrons introduced system brush wear would Continued page 144 * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202 Air Cleaner Fine $225 Replacement Inserts Cat No104 PkI2 lnsertsCoarse $195 Cat No204 PkJ2 Inserts Fine $195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 CESS1A 150 AEROBAT COSMIC WIND 1w Hobbies new EZ Flyers perfect control line planes first time flyer Equipped famous Cox 049 engine newly designed snap starter get airborne flying fast After winning wings step up racy Cosmic Wind same easy starting Cox 049 engine insures lots exciting flight time See complete line Cox powered models accessories Hobby retailer today Enclose $100 SASE minicatalog COX HOBBIES 1525 E Warner Ave Santa Ana CA 92705 July 1987 47 underside OT ins aiipn Mob wiaenea ins fuselage silghtiynote original kit tormerfor comparison allow greater variety batFULL LINE METAL SPECIALISTS terles loaded New width allows four 800 mAh three 1200 mAh cells side-byside Bobs installation uses dozen 800s Four cells sit under forward nest four cells visible oooooooo •VIDEO Hedge Hoppin Vol 3- SpecIal Feature WarbIrdO 4fr Action Tos Model Q Action Interviews Scale 0 Brltish Concorde SST 1 Basic Construction Beginner 107 Mm 4995 sic Flight Training Beginners 65 Mm j 3 Worldof Mode Ava 9OMn 4495 hkosh Overviess 55 M n 3995 0 S ArplaneFunnes 30Mn Wd 39950 Scale Masters 60Mm Th 7 Warbirds Action 75Mm Fantastic 5 S HedgeHoppinVoll 45Mm 4195 9 Which Way Up 70 Mm Aerobatics lOHedge Hoppin Vol 2 40 Mm 41 950 llHedgeHoppinVol3 30Mm 3495C A11 Hedge Hoppin Series Feature Variety Avai sian Topics Full Scale & Model #0 & 0 C INTELLIGENCE SUMMARY ON JAPANESE AIR COMBAT C ACTICS WIREG PURCHASE OF& H EDGE HOPPIN VOL 2 OR WARW BIRDS IN ACTION0 En Purchase BasIc Com- structlon program aiw 3RD regular prIce receive C BasIc FRgIst Training 30% off retail Save0 BUY OR RENT TW TAPES GET VIDEO AT 5O/n OFF 0 w0 Ondetng InformatIonTh Rentals 81495 Rents Deposit Retail Price Tape C Rental Dwuden 7 Days After Delivery Paymat Check 110 days MO. Visa MC Card # & Exp Date PhoneS CODs Available Phone Sales FinalW Q ShIpp4se 375 Foreign Canada Add 10% TotalC Others 15% Res Add 7% Tax AcadeinyelAvlaelonR&D P0 3oz277 1Th Hazel creet N 60429 335 0776 C Z2Gl iIIAGAZINE INDEX 1980 1986 ti-i INFO CONSTRUCTION REVIEWS HOW TOS P,n Si Ms5or Modeling MagazInes 9 2 send Checker MO n oscopes available work So moved laboratory office true facts began emerge Working under low-power optical mic roscope used Dremel tool grinding wheel very carefully remove portion plug order completely expose heating coil did same thing new plug identical brand comparison photos Chemical analysis showed plug heater conformed industry standard thermocouple wire used temperature measurement 90% platinum 10% rhodium 007 diameter Next compared old new heating coils under electron microscope As photographs show progressively increasing magnification begin see telling differences between two photos new coil marked bad coil identified B 40X magnification photos A-i B-i relatively minor differences tween good bad coils apparent increasing magnification 500X photos A-2 B-2 2000X A-3 B-3 5OOOX A-4 B-4 reveals significant differences Notice 2OOOX 5 OOOX new coil basically im maculate marred few die marks wire drawing white spots probably lint dust contrast Photos B-2 B-3 B-4 show faulty coil least its surface has undergone some pervasive chemical change next step analyze nature chemical change bad coil bombarding electrons 20000 volts potential Shooting electrons material high energy causes ma terial give off X rays can used identif material Modem electronics can differentiate between X rays emitted iron example coming out platinum glow plug experiment showed over 95% X rays emanating bad coil produced carbon Comparing carbon X tay photograph Photo B-2 see luminous clusters X ray photo correspond larger clumps carbon Photo B-2 What produces carbon dont have definitive answer question carbon could come combustion varnish composed primarily element both sources Analyzing results experiments can hypothesize three prin cipal situations can contribute glow plug failure 1 The platinum heating coil has physically bent out shape Photo B-i shows coil slightly warped 2 Over period time carbon grad ually diffuses platinum coil counteracting ability platinum catalyze combustion pervades platinum penetrating beyond outer surface carbon will destroy platinums catalytic property 3 thick layer carbon forms onthe filament shielding heat combustion thus rendering incapable igniting next stroke un doubtedly major cause Doing glow plug experiments great fun curiosity satisfied However also learned no safe cure carbon buildup appears main culprit faulty plugs Ac cording chemists place business theres no easy way get rid carbon other some extremely toxic chemicals guess Ill just go buy new plug However aware new plug can bummer Photo B-s shows brand-new plug very carefully removed idle bar reveal coil badly off-center malring premature failure cer tainty Finding good glow plugand keeping waycan problematic proposition Happy ying. may engines run smooooth RC Electrics/Kopski Continued page 47 likely unbelievably bad Finally Mr D Hall Califomia wrote stress view its motor development thats needed rather battery development end developing electrochemical system based Monel Mysterium devel opment being hindered somewhat fact battery can charged annually April 1 writer truly grateful forthe reader acknowledgement support given April 87 MA column thank have shown interest Twins discussed some detall last month time said exception knew series connection best way wire twin motors Well Iran short space last month other month too defer discussion excep tion month Readers may have old Astro iSs other sizes designed run relatively large number lower-capacity cells should wire twin systems parallel connec tion example Ive used great success early 15s twins motor wired parallel same 16-cell 1 2-Ah pack motors used singly run 16 550mAh cells would draw about 10 amps specified propeller days motor brushes simply would hold up under higher currents present-day Astro motors OK latest Electric Davey Systems Caliph first saw Ted Daveys two prototypes last July decided Id get myself Normally Im scratch-builder have last decade purchased two other kitsboth O-Ts Caliph very appealing tome sorta like gas-powered Pronto years agoand went course does little personalizing scratch-building nature simply would let build kit some mods Some shown accompanying photos some explanation follows 144 Model Aviation Y ROAMIN RESEARCH P0 50 104 Oept096-17 Vale MIch 48097
Edition: Model Aviation - 1987/07
Page Numbers: 46, 47, 144
Radio Control E lectrics Bob Kopski MORE Electric meets have announced Im very happy able pass along information First Fifth Annual Boeing Hawks Electric Fly-In scheduled weekend June 27-28 Hawks Kent field will low-key fun-fly format years past information can write Bernard Cawley 29838 48th Avenue South Auburn WA 98001 Next Polk County Soaring Eagles Lakeland FL have announced Second Annual Electric Fun-Fly August 1-2 Several competitive events planned Electric rules proposed 1988-89 AMA rules cycle will used See February 1987 issue MA page 129 information can CD Bill Futch 530 West Lake Wales Rd NLakeWalesFL33853telephone813 676-6740 Now really serious Electric competi tors Felix Vivas called recently told some plans Harbor Soaring Society California encourage interest participa tion FAI Electric flight group will hold single simple FAI competition Costa Mesa CA August 15-16 some very attractive cash prizes will awarded First place goes Bobs nwiy-flnlshed Davey Systems Caliph empty hereweight mere 1 4/2 oz modified bitmost obvious change rounded wing tips Cockpit aiso omitted kit box iabei Beiow exemplifies need Electric motor size specifications/ standards discussed April column says 05 moto can usedbut Confused situation might deter potential kit-purchasers Pfr r direct redu slal ncdedM r home $1000 cash down fourth place Any model compliant AMA/FAI published weight size require46 Model Aviation 05 motor shown 3 channel version ments using seven 12 Ah cells can compete Felix team manager American business end Bobs new Davey Systems Caliph Slotted holes 1/s-in Lite Ply motor mounting plate CL accommodate different locations engine-mount straps various motors mounted Keller 25/12 mounting components Center Light wooden Umount has 1/16 x 1/2-in foam cushions Sandpaper glued bottom gives nonsiip properties mount strapped Straps new technique Sullivan Goiden Rod inners 2-56 hardware clamp motor U-mount model-mounted plywood plate Note Sermos connectors Completed installation R Time wili tell Golden Rod holds up unorthodox application Electric team last year Event Director AMA-sanctioned meet understand meet closed last years team members now everyone else has chance $25 gets can contact Felix 1800 16th St Apt H310 Newport Beach CA 92663 telephone 714 645-3263 Reader reaction April column pouring mail phone Everybody voicing strong support Electric motor specifica tions/standards suggested column single negative comment has registered writer although several readers offered additional suggestions Anyway theres no question nations Electric modelers want meaningful motor ratings OK indus try EAA somethingl Unbelievable reader reaction April story about Unbelievable Motor has also hap pened surprisingly large number readers have written add potentially significant tech nical contributions high-tech marvel few examples Bob Hughley Washington state wrote describe what may brush use single-brush motor brush cast 97% pure Horsematite element found mostly around racetracks Bob feels material will react Unobtainium magnets such fashion motor operation will become virtually self-sustaining David McKeen Texas wrote suggest fantastic power-to-weight ratio Unbelievable Motor would make ideal powering rotorless Helicopters Dick Gibbs Pennsylvania wrote similarly suggest motor would ideal use new bladeless propeller infinite pitch has under development nega tive side Dick cautioned according computer analysis very tight brush clear ances required such motor would dictate few three out-of-round electrons introduced system brush wear would Continued page 144 * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202 Air Cleaner Fine $225 Replacement Inserts Cat No104 PkI2 lnsertsCoarse $195 Cat No204 PkJ2 Inserts Fine $195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 CESS1A 150 AEROBAT COSMIC WIND 1w Hobbies new EZ Flyers perfect control line planes first time flyer Equipped famous Cox 049 engine newly designed snap starter get airborne flying fast After winning wings step up racy Cosmic Wind same easy starting Cox 049 engine insures lots exciting flight time See complete line Cox powered models accessories Hobby retailer today Enclose $100 SASE minicatalog COX HOBBIES 1525 E Warner Ave Santa Ana CA 92705 July 1987 47 underside OT ins aiipn Mob wiaenea ins fuselage silghtiynote original kit tormerfor comparison allow greater variety batFULL LINE METAL SPECIALISTS terles loaded New width allows four 800 mAh three 1200 mAh cells side-byside Bobs installation uses dozen 800s Four cells sit under forward nest four cells visible oooooooo •VIDEO Hedge Hoppin Vol 3- SpecIal Feature WarbIrdO 4fr Action Tos Model Q Action Interviews Scale 0 Brltish Concorde SST 1 Basic Construction Beginner 107 Mm 4995 sic Flight Training Beginners 65 Mm j 3 Worldof Mode Ava 9OMn 4495 hkosh Overviess 55 M n 3995 0 S ArplaneFunnes 30Mn Wd 39950 Scale Masters 60Mm Th 7 Warbirds Action 75Mm Fantastic 5 S HedgeHoppinVoll 45Mm 4195 9 Which Way Up 70 Mm Aerobatics lOHedge Hoppin Vol 2 40 Mm 41 950 llHedgeHoppinVol3 30Mm 3495C A11 Hedge Hoppin Series Feature Variety Avai sian Topics Full Scale & Model #0 & 0 C INTELLIGENCE SUMMARY ON JAPANESE AIR COMBAT C ACTICS WIREG PURCHASE OF& H EDGE HOPPIN VOL 2 OR WARW BIRDS IN ACTION0 En Purchase BasIc Com- structlon program aiw 3RD regular prIce receive C BasIc FRgIst Training 30% off retail Save0 BUY OR RENT TW TAPES GET VIDEO AT 5O/n OFF 0 w0 Ondetng InformatIonTh Rentals 81495 Rents Deposit Retail Price Tape C Rental Dwuden 7 Days After Delivery Paymat Check 110 days MO. Visa MC Card # & Exp Date PhoneS CODs Available Phone Sales FinalW Q ShIpp4se 375 Foreign Canada Add 10% TotalC Others 15% Res Add 7% Tax AcadeinyelAvlaelonR&D P0 3oz277 1Th Hazel creet N 60429 335 0776 C Z2Gl iIIAGAZINE INDEX 1980 1986 ti-i INFO CONSTRUCTION REVIEWS HOW TOS P,n Si Ms5or Modeling MagazInes 9 2 send Checker MO n oscopes available work So moved laboratory office true facts began emerge Working under low-power optical mic roscope used Dremel tool grinding wheel very carefully remove portion plug order completely expose heating coil did same thing new plug identical brand comparison photos Chemical analysis showed plug heater conformed industry standard thermocouple wire used temperature measurement 90% platinum 10% rhodium 007 diameter Next compared old new heating coils under electron microscope As photographs show progressively increasing magnification begin see telling differences between two photos new coil marked bad coil identified B 40X magnification photos A-i B-i relatively minor differences tween good bad coils apparent increasing magnification 500X photos A-2 B-2 2000X A-3 B-3 5OOOX A-4 B-4 reveals significant differences Notice 2OOOX 5 OOOX new coil basically im maculate marred few die marks wire drawing white spots probably lint dust contrast Photos B-2 B-3 B-4 show faulty coil least its surface has undergone some pervasive chemical change next step analyze nature chemical change bad coil bombarding electrons 20000 volts potential Shooting electrons material high energy causes ma terial give off X rays can used identif material Modem electronics can differentiate between X rays emitted iron example coming out platinum glow plug experiment showed over 95% X rays emanating bad coil produced carbon Comparing carbon X tay photograph Photo B-2 see luminous clusters X ray photo correspond larger clumps carbon Photo B-2 What produces carbon dont have definitive answer question carbon could come combustion varnish composed primarily element both sources Analyzing results experiments can hypothesize three prin cipal situations can contribute glow plug failure 1 The platinum heating coil has physically bent out shape Photo B-i shows coil slightly warped 2 Over period time carbon grad ually diffuses platinum coil counteracting ability platinum catalyze combustion pervades platinum penetrating beyond outer surface carbon will destroy platinums catalytic property 3 thick layer carbon forms onthe filament shielding heat combustion thus rendering incapable igniting next stroke un doubtedly major cause Doing glow plug experiments great fun curiosity satisfied However also learned no safe cure carbon buildup appears main culprit faulty plugs Ac cording chemists place business theres no easy way get rid carbon other some extremely toxic chemicals guess Ill just go buy new plug However aware new plug can bummer Photo B-s shows brand-new plug very carefully removed idle bar reveal coil badly off-center malring premature failure cer tainty Finding good glow plugand keeping waycan problematic proposition Happy ying. may engines run smooooth RC Electrics/Kopski Continued page 47 likely unbelievably bad Finally Mr D Hall Califomia wrote stress view its motor development thats needed rather battery development end developing electrochemical system based Monel Mysterium devel opment being hindered somewhat fact battery can charged annually April 1 writer truly grateful forthe reader acknowledgement support given April 87 MA column thank have shown interest Twins discussed some detall last month time said exception knew series connection best way wire twin motors Well Iran short space last month other month too defer discussion excep tion month Readers may have old Astro iSs other sizes designed run relatively large number lower-capacity cells should wire twin systems parallel connec tion example Ive used great success early 15s twins motor wired parallel same 16-cell 1 2-Ah pack motors used singly run 16 550mAh cells would draw about 10 amps specified propeller days motor brushes simply would hold up under higher currents present-day Astro motors OK latest Electric Davey Systems Caliph first saw Ted Daveys two prototypes last July decided Id get myself Normally Im scratch-builder have last decade purchased two other kitsboth O-Ts Caliph very appealing tome sorta like gas-powered Pronto years agoand went course does little personalizing scratch-building nature simply would let build kit some mods Some shown accompanying photos some explanation follows 144 Model Aviation Y ROAMIN RESEARCH P0 50 104 Oept096-17 Vale MIch 48097
Edition: Model Aviation - 1987/07
Page Numbers: 46, 47, 144
Radio Control E lectrics Bob Kopski MORE Electric meets have announced Im very happy able pass along information First Fifth Annual Boeing Hawks Electric Fly-In scheduled weekend June 27-28 Hawks Kent field will low-key fun-fly format years past information can write Bernard Cawley 29838 48th Avenue South Auburn WA 98001 Next Polk County Soaring Eagles Lakeland FL have announced Second Annual Electric Fun-Fly August 1-2 Several competitive events planned Electric rules proposed 1988-89 AMA rules cycle will used See February 1987 issue MA page 129 information can CD Bill Futch 530 West Lake Wales Rd NLakeWalesFL33853telephone813 676-6740 Now really serious Electric competi tors Felix Vivas called recently told some plans Harbor Soaring Society California encourage interest participa tion FAI Electric flight group will hold single simple FAI competition Costa Mesa CA August 15-16 some very attractive cash prizes will awarded First place goes Bobs nwiy-flnlshed Davey Systems Caliph empty hereweight mere 1 4/2 oz modified bitmost obvious change rounded wing tips Cockpit aiso omitted kit box iabei Beiow exemplifies need Electric motor size specifications/ standards discussed April column says 05 moto can usedbut Confused situation might deter potential kit-purchasers Pfr r direct redu slal ncdedM r home $1000 cash down fourth place Any model compliant AMA/FAI published weight size require46 Model Aviation 05 motor shown 3 channel version ments using seven 12 Ah cells can compete Felix team manager American business end Bobs new Davey Systems Caliph Slotted holes 1/s-in Lite Ply motor mounting plate CL accommodate different locations engine-mount straps various motors mounted Keller 25/12 mounting components Center Light wooden Umount has 1/16 x 1/2-in foam cushions Sandpaper glued bottom gives nonsiip properties mount strapped Straps new technique Sullivan Goiden Rod inners 2-56 hardware clamp motor U-mount model-mounted plywood plate Note Sermos connectors Completed installation R Time wili tell Golden Rod holds up unorthodox application Electric team last year Event Director AMA-sanctioned meet understand meet closed last years team members now everyone else has chance $25 gets can contact Felix 1800 16th St Apt H310 Newport Beach CA 92663 telephone 714 645-3263 Reader reaction April column pouring mail phone Everybody voicing strong support Electric motor specifica tions/standards suggested column single negative comment has registered writer although several readers offered additional suggestions Anyway theres no question nations Electric modelers want meaningful motor ratings OK indus try EAA somethingl Unbelievable reader reaction April story about Unbelievable Motor has also hap pened surprisingly large number readers have written add potentially significant tech nical contributions high-tech marvel few examples Bob Hughley Washington state wrote describe what may brush use single-brush motor brush cast 97% pure Horsematite element found mostly around racetracks Bob feels material will react Unobtainium magnets such fashion motor operation will become virtually self-sustaining David McKeen Texas wrote suggest fantastic power-to-weight ratio Unbelievable Motor would make ideal powering rotorless Helicopters Dick Gibbs Pennsylvania wrote similarly suggest motor would ideal use new bladeless propeller infinite pitch has under development nega tive side Dick cautioned according computer analysis very tight brush clear ances required such motor would dictate few three out-of-round electrons introduced system brush wear would Continued page 144 * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $225 Cat No 202 Air Cleaner Fine $225 Replacement Inserts Cat No104 PkI2 lnsertsCoarse $195 Cat No204 PkJ2 Inserts Fine $195 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 CESS1A 150 AEROBAT COSMIC WIND 1w Hobbies new EZ Flyers perfect control line planes first time flyer Equipped famous Cox 049 engine newly designed snap starter get airborne flying fast After winning wings step up racy Cosmic Wind same easy starting Cox 049 engine insures lots exciting flight time See complete line Cox powered models accessories Hobby retailer today Enclose $100 SASE minicatalog COX HOBBIES 1525 E Warner Ave Santa Ana CA 92705 July 1987 47 underside OT ins aiipn Mob wiaenea ins fuselage silghtiynote original kit tormerfor comparison allow greater variety batFULL LINE METAL SPECIALISTS terles loaded New width allows four 800 mAh three 1200 mAh cells side-byside Bobs installation uses dozen 800s Four cells sit under forward nest four cells visible oooooooo •VIDEO Hedge Hoppin Vol 3- SpecIal Feature WarbIrdO 4fr Action Tos Model Q Action Interviews Scale 0 Brltish Concorde SST 1 Basic Construction Beginner 107 Mm 4995 sic Flight Training Beginners 65 Mm j 3 Worldof Mode Ava 9OMn 4495 hkosh Overviess 55 M n 3995 0 S ArplaneFunnes 30Mn Wd 39950 Scale Masters 60Mm Th 7 Warbirds Action 75Mm Fantastic 5 S HedgeHoppinVoll 45Mm 4195 9 Which Way Up 70 Mm Aerobatics lOHedge Hoppin Vol 2 40 Mm 41 950 llHedgeHoppinVol3 30Mm 3495C A11 Hedge Hoppin Series Feature Variety Avai sian Topics Full Scale & Model #0 & 0 C INTELLIGENCE SUMMARY ON JAPANESE AIR COMBAT C ACTICS WIREG PURCHASE OF& H EDGE HOPPIN VOL 2 OR WARW BIRDS IN ACTION0 En Purchase BasIc Com- structlon program aiw 3RD regular prIce receive C BasIc FRgIst Training 30% off retail Save0 BUY OR RENT TW TAPES GET VIDEO AT 5O/n OFF 0 w0 Ondetng InformatIonTh Rentals 81495 Rents Deposit Retail Price Tape C Rental Dwuden 7 Days After Delivery Paymat Check 110 days MO. Visa MC Card # & Exp Date PhoneS CODs Available Phone Sales FinalW Q ShIpp4se 375 Foreign Canada Add 10% TotalC Others 15% Res Add 7% Tax AcadeinyelAvlaelonR&D P0 3oz277 1Th Hazel creet N 60429 335 0776 C Z2Gl iIIAGAZINE INDEX 1980 1986 ti-i INFO CONSTRUCTION REVIEWS HOW TOS P,n Si Ms5or Modeling MagazInes 9 2 send Checker MO n oscopes available work So moved laboratory office true facts began emerge Working under low-power optical mic roscope used Dremel tool grinding wheel very carefully remove portion plug order completely expose heating coil did same thing new plug identical brand comparison photos Chemical analysis showed plug heater conformed industry standard thermocouple wire used temperature measurement 90% platinum 10% rhodium 007 diameter Next compared old new heating coils under electron microscope As photographs show progressively increasing magnification begin see telling differences between two photos new coil marked bad coil identified B 40X magnification photos A-i B-i relatively minor differences tween good bad coils apparent increasing magnification 500X photos A-2 B-2 2000X A-3 B-3 5OOOX A-4 B-4 reveals significant differences Notice 2OOOX 5 OOOX new coil basically im maculate marred few die marks wire drawing white spots probably lint dust contrast Photos B-2 B-3 B-4 show faulty coil least its surface has undergone some pervasive chemical change next step analyze nature chemical change bad coil bombarding electrons 20000 volts potential Shooting electrons material high energy causes ma terial give off X rays can used identif material Modem electronics can differentiate between X rays emitted iron example coming out platinum glow plug experiment showed over 95% X rays emanating bad coil produced carbon Comparing carbon X tay photograph Photo B-2 see luminous clusters X ray photo correspond larger clumps carbon Photo B-2 What produces carbon dont have definitive answer question carbon could come combustion varnish composed primarily element both sources Analyzing results experiments can hypothesize three prin cipal situations can contribute glow plug failure 1 The platinum heating coil has physically bent out shape Photo B-i shows coil slightly warped 2 Over period time carbon grad ually diffuses platinum coil counteracting ability platinum catalyze combustion pervades platinum penetrating beyond outer surface carbon will destroy platinums catalytic property 3 thick layer carbon forms onthe filament shielding heat combustion thus rendering incapable igniting next stroke un doubtedly major cause Doing glow plug experiments great fun curiosity satisfied However also learned no safe cure carbon buildup appears main culprit faulty plugs Ac cording chemists place business theres no easy way get rid carbon other some extremely toxic chemicals guess Ill just go buy new plug However aware new plug can bummer Photo B-s shows brand-new plug very carefully removed idle bar reveal coil badly off-center malring premature failure cer tainty Finding good glow plugand keeping waycan problematic proposition Happy ying. may engines run smooooth RC Electrics/Kopski Continued page 47 likely unbelievably bad Finally Mr D Hall Califomia wrote stress view its motor development thats needed rather battery development end developing electrochemical system based Monel Mysterium devel opment being hindered somewhat fact battery can charged annually April 1 writer truly grateful forthe reader acknowledgement support given April 87 MA column thank have shown interest Twins discussed some detall last month time said exception knew series connection best way wire twin motors Well Iran short space last month other month too defer discussion excep tion month Readers may have old Astro iSs other sizes designed run relatively large number lower-capacity cells should wire twin systems parallel connec tion example Ive used great success early 15s twins motor wired parallel same 16-cell 1 2-Ah pack motors used singly run 16 550mAh cells would draw about 10 amps specified propeller days motor brushes simply would hold up under higher currents present-day Astro motors OK latest Electric Davey Systems Caliph first saw Ted Daveys two prototypes last July decided Id get myself Normally Im scratch-builder have last decade purchased two other kitsboth O-Ts Caliph very appealing tome sorta like gas-powered Pronto years agoand went course does little personalizing scratch-building nature simply would let build kit some mods Some shown accompanying photos some explanation follows 144 Model Aviation Y ROAMIN RESEARCH P0 50 104 Oept096-17 Vale MIch 48097