Indoor Bud Tenny EXPLANATIONS used concept push propin last column comment may require explana tion Before rubber motor reaches critical torque during cruise model delicate balance trimmed minimum sink minimum power expend ed torque drops too low model slows up slightly reducing lift wing Lower lift makes nose drop model picks up speed Since torque too low maintain rpm match speed prop slows down energy speed up prop comes models shallow dive pushes prop keep rpm up Air temperature air inversions also mentioned affecting flight pro file altitude vs time Lets take temper ature first Rubber has definite response temperature change must allowed materials expand increase temperature rubber shrinks means motor con tracts gets warmer torque increases increased tension Figure 1 showing effect flight profile model flies warmer air What happens increased torque stretches level flight portion flight boost warm air could crease rate climb warm air layer entered sooner perhaps causing model climb too high slightly over-wound model drifts warm air during cruise increased torque can reduce rate descent shown Figure 2 Cold air can have reverse effect shown Figure 3 cold air causes motor relax expand giving lower torque model sinks faster Temperature inversions also affect flight performance air building normally warms up beginning top Inversions formed lower air warms up first No matter warm cold air top abrunt transition -I T LI n -r -IE SHARPENED BALSA PEG TRIM FLUSH AND GLUE balsa peg bottom tlssuetube wing socket improves strength stability socketmakes reliable adjustments too temperatures often creates turbulence boundary between air layers often difficult model penetrate preventing model getting high otherwise might have model breaks through cold air rubber will cool down possibly reducing climb hastening start cruise testing Last time left test session two things accomplished 1 You have trimmed model minimum level flight torque 2 You have documented two flightperformance factors level flight rpm level flight torque have at least other helper Continued page 133 T II timehistory indoor models flight should look something like series sketches warm air layer near ceiling can increase time level flight Above L descending warm air wiii slow sink rate Above R S II T Li 0 TX 4E Flying patch cold air L causes model drop rapidly until reaches warm air again Test flying half motors R cut time altitude about half theres column 60 Model Aviation S 1 T Li 0 E xently-published itemized engine eligi lity list also provided giant step wards clarification permissible werplants events ques ns area have ceased itirely understand correspond g design eligibility list coming out ortly soon realized ould have much better handhold introlling variable regard contro rsial designs has seeking NFFS osGas eligibility recently has eorge Fullers original Dixielander pparently some inaccuracies its sumed origin causes initial infusion based formal docu entation NFFS has now pinned eligible tag Mr Fullers fine achine known facts indicate e original Yeoman kit pub hed magazine plans materialized igland approximately same onth 1959 Yeoman kit plans ted previous wins contest entries listed prior 157 Also Georges 59 Aeromodeller tide indicated number earlier protypes includes documented id approved similar Zoot Suit concept contains no definite statements oman finalization among protypes Therefore Dixielander item has en resolved ineligible present Should permitted personal obser stion regard believe exists i additional consideration NFFS sign eligibility other simply ld hard facts documented design stes Stated Purpose FFS Nostalgia Gas Rules comment nd quoteActivity meant laxed enjoyable competitive vels maintained accordance iose original era Dixielandconcept marked obvious advancing Lilestone Free Flight Gas performance ally offered little significance field mpetition until after kit Larketed 59 far domestic Nareness concerned doubt ixielander ever built saw mpetition side Atlantic nor 1957 anyway aesthetics events praised considering eligibility sign aforementioned preamble iould carry sufficient weight flunk ixielander eternity whether proof dstence prior 57 ever eventually ocumented point being made sake preserving btended integrity event NFFS ules Committee may occasion have lean little heavily stated pur ose events considering igibility some advanced esigns event possible similar tuations As hypothetical example iould Sal Taibi Bob Hunter suddenly ugh up some documented pre-57 oodlings butcher paper resemble tardusters Satellites respectively Signal Guard blocks random noise off-frequency signals can cause loss control air land RC models Signal Guard responds sig nals its own precisely tuned fre quency ignoring static noise craft itself Plus additional amplification allows control operators visual limit want spend time flying less time money repairing crashed model Signal Guard answer Call toll-free 1-800-468-8215 order Signal Guard TM major credit card send $9795 check money order j r PO Box 30179 Portland OR 97230 Oregon call collect 503-257-0912 90 day warranty cted dealerships available immediately could have just another AMA event hands NosGas concept would flattened single stroke believe anyone would wish happen therefore gratifying writer learn final NFFS ruling case DL Gosh ever difficult maintain reputation unbiased editor . limit damage report issue disqualified NFFS NosGas design maybe would best terminate column point begin gathering rocks next session Until lets go chasing thermals See ya downwind Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 FF Indoor/Tenny Continued page 60 another important performance factor can measured cruise sink rate After basic trim set put model up again about same launch torque level flight reached get good estimate altitude possible Simi larly determine flight circle diameter time per circle bit calculation gives level-flight velocity As cruise stabilizes change altitude divided time gives cruise sink rate Final trim left test Continued page 136 September 1985 133 ada.aOtatt SWOO OIAtntatat-taC CtOxaadonoxaadwooowaarozootwoatrazratw a- toWOCaOtaat0 OflOOatnSOO arc n a--. noooaoao 000 0V00000 gtPattt7a.wto0t.ttc0orW C 0tttflC Pt rtonn-vtOn oncot0 4g00e iliazi o t1ttflaa 40 SI 4i0X a-iata-d-tra Btt0tO 110 Sattot aPt v t.t-oatatatodaa0010W0 a- add-ata nttnt-ootat-aoao tnt 00rtott0000t0 dlOOa OOtdflbt tad0.d.4S00 totOt 0-00 0th O,tu-CWtWOatofIWflN en 051 tdafl1 11 Oatra 0dtl tad aa Ca onto toOpt-t 0OWC ttdp.I Gd tonott4atant too . na-I w..ta 00 OOtoHadC*0aadOat0-Oda-o00 -aOS GoaOaJtaJad-ta 3100JtaS i* tdfltW COa-CCWtoOdoo 43 C~-0 00~ a-tO adjtotad 00 0-a-Ca-WOW 00100 OWIO -at- C flSfr Stad.. Ofl ... OCot3a0p00-00 0-toCOtaC&00000taS0-0000 Ct 00 too -J d- ttaa-a 0-a-aad-t0-0000-d-taW0-t-ta0-0- -or JfltWd-00OtOC-j0todOtoada0100ad30ad30-tdPO 0 Nt 0 - 0 t toooooa-ooooooootoa-a 1 10totOt 00 I- P-Ij ooo4a-SI l toa0~I II totdtadJ C d Gd eta Otatat ttJtdObaadO00 dUff t0 00mb 0010 a-OtoN4 fltoOCOtO ad1tP-k4Jtot ana..ncadattltl 0*0 t*r 400 -at a. JUI tad atZJWdaW0-a-0aItoto GaPntadtoa-o ttoea-aa-OO0-0-OOI Wad 0 Wtt 0Ott 1000 tOP N 0 01 WOWa- 0 0 t 9 S -JaatOO-J00000 joeaator aa0 doaatn d-d-d-0-aadd-aaW tOt-W-td0-ttfltaaato o Ca 1 - I o C00KI 0~\$ k p0IV -K 0 0to ci o ~ H rTTI Cg\N VT 14a 2 \ Coat otto Wa-tn ad OZr adad 00-0 jOt 0 0 ttzt 0-tat rat t 4 twa-rOt Otto rat tO 00-tad '0-atZd 0 O C-Itoata tnt *ttaa HO8BYHIDEAWAYHOBRYHIDEAWAYIOBBYHIDEAWAYHOBBYH1DEAWAYHOBBY Sz03 oIllo O-w lAW r0 0 0 C 0 icn toW Z ~Ja~ HORBYHTDEAWAYHOSBYHIDgAWAYHOBBYHIDEAWAYHOBBYHTOEAWAYHOBBY b00Oaae0 ~tb0 o 0- ~ 2 a~ta- 0- Q 2 2 -i t- 0 -a et Id JQ ad C -tCa000Ca -t a0 -t aa-t0a-a-2o0~a- -tt-a-ra-Ca0 t - a 0a-a-taOtn t a- a.ao-.0 b0-Ct 0- - a. S ote ~ -to attCa rio a-a -t 0 ri Y l 0 3afl DO Jo -q CafOa -a- 00- - ga 0-a-t~taO S S - 5 -tO oa x 5a 45IaQ o S- 0 55Ca 0-r 0 4 0 9 C U 4 9 U 0 99 C 01* em 0 U, 9 gO 0 Q 0 99 1* h CA atW 00 aOOto ad Ii Nil ad Zrtrt tot tn-ad lID 55 50 0 gb t - U 00adad~ 0A2 5 1 1 i dSa0O0a 0 atfl tod000~ 5 U 00 oaJ00O0P0to Use CG XCel controlled accel eration Slow Jet Youll get rockhard crystal-clear applications Slow Jet available squeezable clogresistant half-ounce one-ounce twoounce boffles MADE IN US C 1985 CARL GOLDBERG MOD one-half long half weight using same rubber full motor rest motor spacer hook end weighing exactly half much full motor technique re quires very careful measurements since effect error doubled plot flight profiles taken full half motors theoretically would like Figure 4 Because things can affect results test useful mostly prove trim correct Flight test measure ments will harder take because phase flight lasts half long also possible use one-third motors given adequate care reduce errors course spacer needs weigh twothirds much full motor Hold trim Once model has adjusted must able get same trim setup time models ad just setting wing posts can make reliable adjustments proper adjustment has posts bottomed sockets Figure 5 shows stall sockets maximum reliability balsa plug bottom socket sharpened stuck through bottom motor stick glued point sanded flush avoid interfering motor socket has now firmly anchored plug gives good base bottom wing post against Bud Tenny Box 545 Richardson TX 75080 Up til now needed thick CA make whatever could get Because extra-thick cyanoacrylate youve asking finally CG Slow Jet made professional standards formulation quality control right USA made sure just way wanted before sold drop Give Slow Jet try think youll agree extra care weve given reallyCARL GOLDBERG does makeabigMODELS INC difference FF Old-Timers/Haught Continued page 61 has forwarded sample new version miniature coil having new hightemperature insulation primary windings new coil designed prolonged engine runs typical RC Assist order cope higher tem perature build-up due longer usual engine runs have using Gettig coils since introduction Free Flight applications have experienced problems whatsoever engine runs have seldom 4735 WEST CHICAGO AVE CHICAGO IL 60651 exceeded 20 seconds counting ground adjustment time concerned temperature build-up long engine runs will able purchase new coil fall Gettig ignition components godsend small Free Flight models weight critical RC fliers will also find helpful reducing all-up weight radio-laden model Martin now considering manufactur ing twin coil enough people inter ested good news let Martin know will help him decide market exists RC Free Flight remember few years LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS Cli MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 COMPLETE THIS FOAM AND ATTACH MAILING LABEL FROM RECENT ISSUE September1985 137 Introducing Slow Jet extra-thick CA glue Carl Goldberg
Edition: Model Aviation - 1985/09
Page Numbers: 60, 133, 136, 137
Indoor Bud Tenny EXPLANATIONS used concept push propin last column comment may require explana tion Before rubber motor reaches critical torque during cruise model delicate balance trimmed minimum sink minimum power expend ed torque drops too low model slows up slightly reducing lift wing Lower lift makes nose drop model picks up speed Since torque too low maintain rpm match speed prop slows down energy speed up prop comes models shallow dive pushes prop keep rpm up Air temperature air inversions also mentioned affecting flight pro file altitude vs time Lets take temper ature first Rubber has definite response temperature change must allowed materials expand increase temperature rubber shrinks means motor con tracts gets warmer torque increases increased tension Figure 1 showing effect flight profile model flies warmer air What happens increased torque stretches level flight portion flight boost warm air could crease rate climb warm air layer entered sooner perhaps causing model climb too high slightly over-wound model drifts warm air during cruise increased torque can reduce rate descent shown Figure 2 Cold air can have reverse effect shown Figure 3 cold air causes motor relax expand giving lower torque model sinks faster Temperature inversions also affect flight performance air building normally warms up beginning top Inversions formed lower air warms up first No matter warm cold air top abrunt transition -I T LI n -r -IE SHARPENED BALSA PEG TRIM FLUSH AND GLUE balsa peg bottom tlssuetube wing socket improves strength stability socketmakes reliable adjustments too temperatures often creates turbulence boundary between air layers often difficult model penetrate preventing model getting high otherwise might have model breaks through cold air rubber will cool down possibly reducing climb hastening start cruise testing Last time left test session two things accomplished 1 You have trimmed model minimum level flight torque 2 You have documented two flightperformance factors level flight rpm level flight torque have at least other helper Continued page 133 T II timehistory indoor models flight should look something like series sketches warm air layer near ceiling can increase time level flight Above L descending warm air wiii slow sink rate Above R S II T Li 0 TX 4E Flying patch cold air L causes model drop rapidly until reaches warm air again Test flying half motors R cut time altitude about half theres column 60 Model Aviation S 1 T Li 0 E xently-published itemized engine eligi lity list also provided giant step wards clarification permissible werplants events ques ns area have ceased itirely understand correspond g design eligibility list coming out ortly soon realized ould have much better handhold introlling variable regard contro rsial designs has seeking NFFS osGas eligibility recently has eorge Fullers original Dixielander pparently some inaccuracies its sumed origin causes initial infusion based formal docu entation NFFS has now pinned eligible tag Mr Fullers fine achine known facts indicate e original Yeoman kit pub hed magazine plans materialized igland approximately same onth 1959 Yeoman kit plans ted previous wins contest entries listed prior 157 Also Georges 59 Aeromodeller tide indicated number earlier protypes includes documented id approved similar Zoot Suit concept contains no definite statements oman finalization among protypes Therefore Dixielander item has en resolved ineligible present Should permitted personal obser stion regard believe exists i additional consideration NFFS sign eligibility other simply ld hard facts documented design stes Stated Purpose FFS Nostalgia Gas Rules comment nd quoteActivity meant laxed enjoyable competitive vels maintained accordance iose original era Dixielandconcept marked obvious advancing Lilestone Free Flight Gas performance ally offered little significance field mpetition until after kit Larketed 59 far domestic Nareness concerned doubt ixielander ever built saw mpetition side Atlantic nor 1957 anyway aesthetics events praised considering eligibility sign aforementioned preamble iould carry sufficient weight flunk ixielander eternity whether proof dstence prior 57 ever eventually ocumented point being made sake preserving btended integrity event NFFS ules Committee may occasion have lean little heavily stated pur ose events considering igibility some advanced esigns event possible similar tuations As hypothetical example iould Sal Taibi Bob Hunter suddenly ugh up some documented pre-57 oodlings butcher paper resemble tardusters Satellites respectively Signal Guard blocks random noise off-frequency signals can cause loss control air land RC models Signal Guard responds sig nals its own precisely tuned fre quency ignoring static noise craft itself Plus additional amplification allows control operators visual limit want spend time flying less time money repairing crashed model Signal Guard answer Call toll-free 1-800-468-8215 order Signal Guard TM major credit card send $9795 check money order j r PO Box 30179 Portland OR 97230 Oregon call collect 503-257-0912 90 day warranty cted dealerships available immediately could have just another AMA event hands NosGas concept would flattened single stroke believe anyone would wish happen therefore gratifying writer learn final NFFS ruling case DL Gosh ever difficult maintain reputation unbiased editor . limit damage report issue disqualified NFFS NosGas design maybe would best terminate column point begin gathering rocks next session Until lets go chasing thermals See ya downwind Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 FF Indoor/Tenny Continued page 60 another important performance factor can measured cruise sink rate After basic trim set put model up again about same launch torque level flight reached get good estimate altitude possible Simi larly determine flight circle diameter time per circle bit calculation gives level-flight velocity As cruise stabilizes change altitude divided time gives cruise sink rate Final trim left test Continued page 136 September 1985 133 ada.aOtatt SWOO OIAtntatat-taC CtOxaadonoxaadwooowaarozootwoatrazratw a- toWOCaOtaat0 OflOOatnSOO arc n a--. noooaoao 000 0V00000 gtPattt7a.wto0t.ttc0orW C 0tttflC Pt rtonn-vtOn oncot0 4g00e iliazi o t1ttflaa 40 SI 4i0X a-iata-d-tra Btt0tO 110 Sattot aPt v t.t-oatatatodaa0010W0 a- add-ata nttnt-ootat-aoao tnt 00rtott0000t0 dlOOa OOtdflbt tad0.d.4S00 totOt 0-00 0th O,tu-CWtWOatofIWflN en 051 tdafl1 11 Oatra 0dtl tad aa Ca onto toOpt-t 0OWC ttdp.I Gd tonott4atant too . na-I w..ta 00 OOtoHadC*0aadOat0-Oda-o00 -aOS GoaOaJtaJad-ta 3100JtaS i* tdfltW COa-CCWtoOdoo 43 C~-0 00~ a-tO adjtotad 00 0-a-Ca-WOW 00100 OWIO -at- C flSfr Stad.. Ofl ... OCot3a0p00-00 0-toCOtaC&00000taS0-0000 Ct 00 too -J d- ttaa-a 0-a-aad-t0-0000-d-taW0-t-ta0-0- -or JfltWd-00OtOC-j0todOtoada0100ad30ad30-tdPO 0 Nt 0 - 0 t toooooa-ooooooootoa-a 1 10totOt 00 I- P-Ij ooo4a-SI l toa0~I II totdtadJ C d Gd eta Otatat ttJtdObaadO00 dUff t0 00mb 0010 a-OtoN4 fltoOCOtO ad1tP-k4Jtot ana..ncadattltl 0*0 t*r 400 -at a. JUI tad atZJWdaW0-a-0aItoto GaPntadtoa-o ttoea-aa-OO0-0-OOI Wad 0 Wtt 0Ott 1000 tOP N 0 01 WOWa- 0 0 t 9 S -JaatOO-J00000 joeaator aa0 doaatn d-d-d-0-aadd-aaW tOt-W-td0-ttfltaaato o Ca 1 - I o C00KI 0~\$ k p0IV -K 0 0to ci o ~ H rTTI Cg\N VT 14a 2 \ Coat otto Wa-tn ad OZr adad 00-0 jOt 0 0 ttzt 0-tat rat t 4 twa-rOt Otto rat tO 00-tad '0-atZd 0 O C-Itoata tnt *ttaa HO8BYHIDEAWAYHOBRYHIDEAWAYIOBBYHIDEAWAYHOBBYH1DEAWAYHOBBY Sz03 oIllo O-w lAW r0 0 0 C 0 icn toW Z ~Ja~ HORBYHTDEAWAYHOSBYHIDgAWAYHOBBYHIDEAWAYHOBBYHTOEAWAYHOBBY b00Oaae0 ~tb0 o 0- ~ 2 a~ta- 0- Q 2 2 -i t- 0 -a et Id JQ ad C -tCa000Ca -t a0 -t aa-t0a-a-2o0~a- -tt-a-ra-Ca0 t - a 0a-a-taOtn t a- a.ao-.0 b0-Ct 0- - a. S ote ~ -to attCa rio a-a -t 0 ri Y l 0 3afl DO Jo -q CafOa -a- 00- - ga 0-a-t~taO S S - 5 -tO oa x 5a 45IaQ o S- 0 55Ca 0-r 0 4 0 9 C U 4 9 U 0 99 C 01* em 0 U, 9 gO 0 Q 0 99 1* h CA atW 00 aOOto ad Ii Nil ad Zrtrt tot tn-ad lID 55 50 0 gb t - U 00adad~ 0A2 5 1 1 i dSa0O0a 0 atfl tod000~ 5 U 00 oaJ00O0P0to Use CG XCel controlled accel eration Slow Jet Youll get rockhard crystal-clear applications Slow Jet available squeezable clogresistant half-ounce one-ounce twoounce boffles MADE IN US C 1985 CARL GOLDBERG MOD one-half long half weight using same rubber full motor rest motor spacer hook end weighing exactly half much full motor technique re quires very careful measurements since effect error doubled plot flight profiles taken full half motors theoretically would like Figure 4 Because things can affect results test useful mostly prove trim correct Flight test measure ments will harder take because phase flight lasts half long also possible use one-third motors given adequate care reduce errors course spacer needs weigh twothirds much full motor Hold trim Once model has adjusted must able get same trim setup time models ad just setting wing posts can make reliable adjustments proper adjustment has posts bottomed sockets Figure 5 shows stall sockets maximum reliability balsa plug bottom socket sharpened stuck through bottom motor stick glued point sanded flush avoid interfering motor socket has now firmly anchored plug gives good base bottom wing post against Bud Tenny Box 545 Richardson TX 75080 Up til now needed thick CA make whatever could get Because extra-thick cyanoacrylate youve asking finally CG Slow Jet made professional standards formulation quality control right USA made sure just way wanted before sold drop Give Slow Jet try think youll agree extra care weve given reallyCARL GOLDBERG does makeabigMODELS INC difference FF Old-Timers/Haught Continued page 61 has forwarded sample new version miniature coil having new hightemperature insulation primary windings new coil designed prolonged engine runs typical RC Assist order cope higher tem perature build-up due longer usual engine runs have using Gettig coils since introduction Free Flight applications have experienced problems whatsoever engine runs have seldom 4735 WEST CHICAGO AVE CHICAGO IL 60651 exceeded 20 seconds counting ground adjustment time concerned temperature build-up long engine runs will able purchase new coil fall Gettig ignition components godsend small Free Flight models weight critical RC fliers will also find helpful reducing all-up weight radio-laden model Martin now considering manufactur ing twin coil enough people inter ested good news let Martin know will help him decide market exists RC Free Flight remember few years LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS Cli MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 COMPLETE THIS FOAM AND ATTACH MAILING LABEL FROM RECENT ISSUE September1985 137 Introducing Slow Jet extra-thick CA glue Carl Goldberg
Edition: Model Aviation - 1985/09
Page Numbers: 60, 133, 136, 137
Indoor Bud Tenny EXPLANATIONS used concept push propin last column comment may require explana tion Before rubber motor reaches critical torque during cruise model delicate balance trimmed minimum sink minimum power expend ed torque drops too low model slows up slightly reducing lift wing Lower lift makes nose drop model picks up speed Since torque too low maintain rpm match speed prop slows down energy speed up prop comes models shallow dive pushes prop keep rpm up Air temperature air inversions also mentioned affecting flight pro file altitude vs time Lets take temper ature first Rubber has definite response temperature change must allowed materials expand increase temperature rubber shrinks means motor con tracts gets warmer torque increases increased tension Figure 1 showing effect flight profile model flies warmer air What happens increased torque stretches level flight portion flight boost warm air could crease rate climb warm air layer entered sooner perhaps causing model climb too high slightly over-wound model drifts warm air during cruise increased torque can reduce rate descent shown Figure 2 Cold air can have reverse effect shown Figure 3 cold air causes motor relax expand giving lower torque model sinks faster Temperature inversions also affect flight performance air building normally warms up beginning top Inversions formed lower air warms up first No matter warm cold air top abrunt transition -I T LI n -r -IE SHARPENED BALSA PEG TRIM FLUSH AND GLUE balsa peg bottom tlssuetube wing socket improves strength stability socketmakes reliable adjustments too temperatures often creates turbulence boundary between air layers often difficult model penetrate preventing model getting high otherwise might have model breaks through cold air rubber will cool down possibly reducing climb hastening start cruise testing Last time left test session two things accomplished 1 You have trimmed model minimum level flight torque 2 You have documented two flightperformance factors level flight rpm level flight torque have at least other helper Continued page 133 T II timehistory indoor models flight should look something like series sketches warm air layer near ceiling can increase time level flight Above L descending warm air wiii slow sink rate Above R S II T Li 0 TX 4E Flying patch cold air L causes model drop rapidly until reaches warm air again Test flying half motors R cut time altitude about half theres column 60 Model Aviation S 1 T Li 0 E xently-published itemized engine eligi lity list also provided giant step wards clarification permissible werplants events ques ns area have ceased itirely understand correspond g design eligibility list coming out ortly soon realized ould have much better handhold introlling variable regard contro rsial designs has seeking NFFS osGas eligibility recently has eorge Fullers original Dixielander pparently some inaccuracies its sumed origin causes initial infusion based formal docu entation NFFS has now pinned eligible tag Mr Fullers fine achine known facts indicate e original Yeoman kit pub hed magazine plans materialized igland approximately same onth 1959 Yeoman kit plans ted previous wins contest entries listed prior 157 Also Georges 59 Aeromodeller tide indicated number earlier protypes includes documented id approved similar Zoot Suit concept contains no definite statements oman finalization among protypes Therefore Dixielander item has en resolved ineligible present Should permitted personal obser stion regard believe exists i additional consideration NFFS sign eligibility other simply ld hard facts documented design stes Stated Purpose FFS Nostalgia Gas Rules comment nd quoteActivity meant laxed enjoyable competitive vels maintained accordance iose original era Dixielandconcept marked obvious advancing Lilestone Free Flight Gas performance ally offered little significance field mpetition until after kit Larketed 59 far domestic Nareness concerned doubt ixielander ever built saw mpetition side Atlantic nor 1957 anyway aesthetics events praised considering eligibility sign aforementioned preamble iould carry sufficient weight flunk ixielander eternity whether proof dstence prior 57 ever eventually ocumented point being made sake preserving btended integrity event NFFS ules Committee may occasion have lean little heavily stated pur ose events considering igibility some advanced esigns event possible similar tuations As hypothetical example iould Sal Taibi Bob Hunter suddenly ugh up some documented pre-57 oodlings butcher paper resemble tardusters Satellites respectively Signal Guard blocks random noise off-frequency signals can cause loss control air land RC models Signal Guard responds sig nals its own precisely tuned fre quency ignoring static noise craft itself Plus additional amplification allows control operators visual limit want spend time flying less time money repairing crashed model Signal Guard answer Call toll-free 1-800-468-8215 order Signal Guard TM major credit card send $9795 check money order j r PO Box 30179 Portland OR 97230 Oregon call collect 503-257-0912 90 day warranty cted dealerships available immediately could have just another AMA event hands NosGas concept would flattened single stroke believe anyone would wish happen therefore gratifying writer learn final NFFS ruling case DL Gosh ever difficult maintain reputation unbiased editor . limit damage report issue disqualified NFFS NosGas design maybe would best terminate column point begin gathering rocks next session Until lets go chasing thermals See ya downwind Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 FF Indoor/Tenny Continued page 60 another important performance factor can measured cruise sink rate After basic trim set put model up again about same launch torque level flight reached get good estimate altitude possible Simi larly determine flight circle diameter time per circle bit calculation gives level-flight velocity As cruise stabilizes change altitude divided time gives cruise sink rate Final trim left test Continued page 136 September 1985 133 ada.aOtatt SWOO OIAtntatat-taC CtOxaadonoxaadwooowaarozootwoatrazratw a- toWOCaOtaat0 OflOOatnSOO arc n a--. noooaoao 000 0V00000 gtPattt7a.wto0t.ttc0orW C 0tttflC Pt rtonn-vtOn oncot0 4g00e iliazi o t1ttflaa 40 SI 4i0X a-iata-d-tra Btt0tO 110 Sattot aPt v t.t-oatatatodaa0010W0 a- add-ata nttnt-ootat-aoao tnt 00rtott0000t0 dlOOa OOtdflbt tad0.d.4S00 totOt 0-00 0th O,tu-CWtWOatofIWflN en 051 tdafl1 11 Oatra 0dtl tad aa Ca onto toOpt-t 0OWC ttdp.I Gd tonott4atant too . na-I w..ta 00 OOtoHadC*0aadOat0-Oda-o00 -aOS GoaOaJtaJad-ta 3100JtaS i* tdfltW COa-CCWtoOdoo 43 C~-0 00~ a-tO adjtotad 00 0-a-Ca-WOW 00100 OWIO -at- C flSfr Stad.. Ofl ... OCot3a0p00-00 0-toCOtaC&00000taS0-0000 Ct 00 too -J d- ttaa-a 0-a-aad-t0-0000-d-taW0-t-ta0-0- -or JfltWd-00OtOC-j0todOtoada0100ad30ad30-tdPO 0 Nt 0 - 0 t toooooa-ooooooootoa-a 1 10totOt 00 I- P-Ij ooo4a-SI l toa0~I II totdtadJ C d Gd eta Otatat ttJtdObaadO00 dUff t0 00mb 0010 a-OtoN4 fltoOCOtO ad1tP-k4Jtot ana..ncadattltl 0*0 t*r 400 -at a. JUI tad atZJWdaW0-a-0aItoto GaPntadtoa-o ttoea-aa-OO0-0-OOI Wad 0 Wtt 0Ott 1000 tOP N 0 01 WOWa- 0 0 t 9 S -JaatOO-J00000 joeaator aa0 doaatn d-d-d-0-aadd-aaW tOt-W-td0-ttfltaaato o Ca 1 - I o C00KI 0~\$ k p0IV -K 0 0to ci o ~ H rTTI Cg\N VT 14a 2 \ Coat otto Wa-tn ad OZr adad 00-0 jOt 0 0 ttzt 0-tat rat t 4 twa-rOt Otto rat tO 00-tad '0-atZd 0 O C-Itoata tnt *ttaa HO8BYHIDEAWAYHOBRYHIDEAWAYIOBBYHIDEAWAYHOBBYH1DEAWAYHOBBY Sz03 oIllo O-w lAW r0 0 0 C 0 icn toW Z ~Ja~ HORBYHTDEAWAYHOSBYHIDgAWAYHOBBYHIDEAWAYHOBBYHTOEAWAYHOBBY b00Oaae0 ~tb0 o 0- ~ 2 a~ta- 0- Q 2 2 -i t- 0 -a et Id JQ ad C -tCa000Ca -t a0 -t aa-t0a-a-2o0~a- -tt-a-ra-Ca0 t - a 0a-a-taOtn t a- a.ao-.0 b0-Ct 0- - a. S ote ~ -to attCa rio a-a -t 0 ri Y l 0 3afl DO Jo -q CafOa -a- 00- - ga 0-a-t~taO S S - 5 -tO oa x 5a 45IaQ o S- 0 55Ca 0-r 0 4 0 9 C U 4 9 U 0 99 C 01* em 0 U, 9 gO 0 Q 0 99 1* h CA atW 00 aOOto ad Ii Nil ad Zrtrt tot tn-ad lID 55 50 0 gb t - U 00adad~ 0A2 5 1 1 i dSa0O0a 0 atfl tod000~ 5 U 00 oaJ00O0P0to Use CG XCel controlled accel eration Slow Jet Youll get rockhard crystal-clear applications Slow Jet available squeezable clogresistant half-ounce one-ounce twoounce boffles MADE IN US C 1985 CARL GOLDBERG MOD one-half long half weight using same rubber full motor rest motor spacer hook end weighing exactly half much full motor technique re quires very careful measurements since effect error doubled plot flight profiles taken full half motors theoretically would like Figure 4 Because things can affect results test useful mostly prove trim correct Flight test measure ments will harder take because phase flight lasts half long also possible use one-third motors given adequate care reduce errors course spacer needs weigh twothirds much full motor Hold trim Once model has adjusted must able get same trim setup time models ad just setting wing posts can make reliable adjustments proper adjustment has posts bottomed sockets Figure 5 shows stall sockets maximum reliability balsa plug bottom socket sharpened stuck through bottom motor stick glued point sanded flush avoid interfering motor socket has now firmly anchored plug gives good base bottom wing post against Bud Tenny Box 545 Richardson TX 75080 Up til now needed thick CA make whatever could get Because extra-thick cyanoacrylate youve asking finally CG Slow Jet made professional standards formulation quality control right USA made sure just way wanted before sold drop Give Slow Jet try think youll agree extra care weve given reallyCARL GOLDBERG does makeabigMODELS INC difference FF Old-Timers/Haught Continued page 61 has forwarded sample new version miniature coil having new hightemperature insulation primary windings new coil designed prolonged engine runs typical RC Assist order cope higher tem perature build-up due longer usual engine runs have using Gettig coils since introduction Free Flight applications have experienced problems whatsoever engine runs have seldom 4735 WEST CHICAGO AVE CHICAGO IL 60651 exceeded 20 seconds counting ground adjustment time concerned temperature build-up long engine runs will able purchase new coil fall Gettig ignition components godsend small Free Flight models weight critical RC fliers will also find helpful reducing all-up weight radio-laden model Martin now considering manufactur ing twin coil enough people inter ested good news let Martin know will help him decide market exists RC Free Flight remember few years LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS Cli MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 COMPLETE THIS FOAM AND ATTACH MAILING LABEL FROM RECENT ISSUE September1985 137 Introducing Slow Jet extra-thick CA glue Carl Goldberg
Edition: Model Aviation - 1985/09
Page Numbers: 60, 133, 136, 137
Indoor Bud Tenny EXPLANATIONS used concept push propin last column comment may require explana tion Before rubber motor reaches critical torque during cruise model delicate balance trimmed minimum sink minimum power expend ed torque drops too low model slows up slightly reducing lift wing Lower lift makes nose drop model picks up speed Since torque too low maintain rpm match speed prop slows down energy speed up prop comes models shallow dive pushes prop keep rpm up Air temperature air inversions also mentioned affecting flight pro file altitude vs time Lets take temper ature first Rubber has definite response temperature change must allowed materials expand increase temperature rubber shrinks means motor con tracts gets warmer torque increases increased tension Figure 1 showing effect flight profile model flies warmer air What happens increased torque stretches level flight portion flight boost warm air could crease rate climb warm air layer entered sooner perhaps causing model climb too high slightly over-wound model drifts warm air during cruise increased torque can reduce rate descent shown Figure 2 Cold air can have reverse effect shown Figure 3 cold air causes motor relax expand giving lower torque model sinks faster Temperature inversions also affect flight performance air building normally warms up beginning top Inversions formed lower air warms up first No matter warm cold air top abrunt transition -I T LI n -r -IE SHARPENED BALSA PEG TRIM FLUSH AND GLUE balsa peg bottom tlssuetube wing socket improves strength stability socketmakes reliable adjustments too temperatures often creates turbulence boundary between air layers often difficult model penetrate preventing model getting high otherwise might have model breaks through cold air rubber will cool down possibly reducing climb hastening start cruise testing Last time left test session two things accomplished 1 You have trimmed model minimum level flight torque 2 You have documented two flightperformance factors level flight rpm level flight torque have at least other helper Continued page 133 T II timehistory indoor models flight should look something like series sketches warm air layer near ceiling can increase time level flight Above L descending warm air wiii slow sink rate Above R S II T Li 0 TX 4E Flying patch cold air L causes model drop rapidly until reaches warm air again Test flying half motors R cut time altitude about half theres column 60 Model Aviation S 1 T Li 0 E xently-published itemized engine eligi lity list also provided giant step wards clarification permissible werplants events ques ns area have ceased itirely understand correspond g design eligibility list coming out ortly soon realized ould have much better handhold introlling variable regard contro rsial designs has seeking NFFS osGas eligibility recently has eorge Fullers original Dixielander pparently some inaccuracies its sumed origin causes initial infusion based formal docu entation NFFS has now pinned eligible tag Mr Fullers fine achine known facts indicate e original Yeoman kit pub hed magazine plans materialized igland approximately same onth 1959 Yeoman kit plans ted previous wins contest entries listed prior 157 Also Georges 59 Aeromodeller tide indicated number earlier protypes includes documented id approved similar Zoot Suit concept contains no definite statements oman finalization among protypes Therefore Dixielander item has en resolved ineligible present Should permitted personal obser stion regard believe exists i additional consideration NFFS sign eligibility other simply ld hard facts documented design stes Stated Purpose FFS Nostalgia Gas Rules comment nd quoteActivity meant laxed enjoyable competitive vels maintained accordance iose original era Dixielandconcept marked obvious advancing Lilestone Free Flight Gas performance ally offered little significance field mpetition until after kit Larketed 59 far domestic Nareness concerned doubt ixielander ever built saw mpetition side Atlantic nor 1957 anyway aesthetics events praised considering eligibility sign aforementioned preamble iould carry sufficient weight flunk ixielander eternity whether proof dstence prior 57 ever eventually ocumented point being made sake preserving btended integrity event NFFS ules Committee may occasion have lean little heavily stated pur ose events considering igibility some advanced esigns event possible similar tuations As hypothetical example iould Sal Taibi Bob Hunter suddenly ugh up some documented pre-57 oodlings butcher paper resemble tardusters Satellites respectively Signal Guard blocks random noise off-frequency signals can cause loss control air land RC models Signal Guard responds sig nals its own precisely tuned fre quency ignoring static noise craft itself Plus additional amplification allows control operators visual limit want spend time flying less time money repairing crashed model Signal Guard answer Call toll-free 1-800-468-8215 order Signal Guard TM major credit card send $9795 check money order j r PO Box 30179 Portland OR 97230 Oregon call collect 503-257-0912 90 day warranty cted dealerships available immediately could have just another AMA event hands NosGas concept would flattened single stroke believe anyone would wish happen therefore gratifying writer learn final NFFS ruling case DL Gosh ever difficult maintain reputation unbiased editor . limit damage report issue disqualified NFFS NosGas design maybe would best terminate column point begin gathering rocks next session Until lets go chasing thermals See ya downwind Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 FF Indoor/Tenny Continued page 60 another important performance factor can measured cruise sink rate After basic trim set put model up again about same launch torque level flight reached get good estimate altitude possible Simi larly determine flight circle diameter time per circle bit calculation gives level-flight velocity As cruise stabilizes change altitude divided time gives cruise sink rate Final trim left test Continued page 136 September 1985 133 ada.aOtatt SWOO OIAtntatat-taC CtOxaadonoxaadwooowaarozootwoatrazratw a- toWOCaOtaat0 OflOOatnSOO arc n a--. noooaoao 000 0V00000 gtPattt7a.wto0t.ttc0orW C 0tttflC Pt rtonn-vtOn oncot0 4g00e iliazi o t1ttflaa 40 SI 4i0X a-iata-d-tra Btt0tO 110 Sattot aPt v t.t-oatatatodaa0010W0 a- add-ata nttnt-ootat-aoao tnt 00rtott0000t0 dlOOa OOtdflbt tad0.d.4S00 totOt 0-00 0th O,tu-CWtWOatofIWflN en 051 tdafl1 11 Oatra 0dtl tad aa Ca onto toOpt-t 0OWC ttdp.I Gd tonott4atant too . na-I w..ta 00 OOtoHadC*0aadOat0-Oda-o00 -aOS GoaOaJtaJad-ta 3100JtaS i* tdfltW COa-CCWtoOdoo 43 C~-0 00~ a-tO adjtotad 00 0-a-Ca-WOW 00100 OWIO -at- C flSfr Stad.. 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JUI tad atZJWdaW0-a-0aItoto GaPntadtoa-o ttoea-aa-OO0-0-OOI Wad 0 Wtt 0Ott 1000 tOP N 0 01 WOWa- 0 0 t 9 S -JaatOO-J00000 joeaator aa0 doaatn d-d-d-0-aadd-aaW tOt-W-td0-ttfltaaato o Ca 1 - I o C00KI 0~\$ k p0IV -K 0 0to ci o ~ H rTTI Cg\N VT 14a 2 \ Coat otto Wa-tn ad OZr adad 00-0 jOt 0 0 ttzt 0-tat rat t 4 twa-rOt Otto rat tO 00-tad '0-atZd 0 O C-Itoata tnt *ttaa HO8BYHIDEAWAYHOBRYHIDEAWAYIOBBYHIDEAWAYHOBBYH1DEAWAYHOBBY Sz03 oIllo O-w lAW r0 0 0 C 0 icn toW Z ~Ja~ HORBYHTDEAWAYHOSBYHIDgAWAYHOBBYHIDEAWAYHOBBYHTOEAWAYHOBBY b00Oaae0 ~tb0 o 0- ~ 2 a~ta- 0- Q 2 2 -i t- 0 -a et Id JQ ad C -tCa000Ca -t a0 -t aa-t0a-a-2o0~a- -tt-a-ra-Ca0 t - a 0a-a-taOtn t a- a.ao-.0 b0-Ct 0- - a. S ote ~ -to attCa rio a-a -t 0 ri Y l 0 3afl DO Jo -q CafOa -a- 00- - ga 0-a-t~taO S S - 5 -tO oa x 5a 45IaQ o S- 0 55Ca 0-r 0 4 0 9 C U 4 9 U 0 99 C 01* em 0 U, 9 gO 0 Q 0 99 1* h CA atW 00 aOOto ad Ii Nil ad Zrtrt tot tn-ad lID 55 50 0 gb t - U 00adad~ 0A2 5 1 1 i dSa0O0a 0 atfl tod000~ 5 U 00 oaJ00O0P0to Use CG XCel controlled accel eration Slow Jet Youll get rockhard crystal-clear applications Slow Jet available squeezable clogresistant half-ounce one-ounce twoounce boffles MADE IN US C 1985 CARL GOLDBERG MOD one-half long half weight using same rubber full motor rest motor spacer hook end weighing exactly half much full motor technique re quires very careful measurements since effect error doubled plot flight profiles taken full half motors theoretically would like Figure 4 Because things can affect results test useful mostly prove trim correct Flight test measure ments will harder take because phase flight lasts half long also possible use one-third motors given adequate care reduce errors course spacer needs weigh twothirds much full motor Hold trim Once model has adjusted must able get same trim setup time models ad just setting wing posts can make reliable adjustments proper adjustment has posts bottomed sockets Figure 5 shows stall sockets maximum reliability balsa plug bottom socket sharpened stuck through bottom motor stick glued point sanded flush avoid interfering motor socket has now firmly anchored plug gives good base bottom wing post against Bud Tenny Box 545 Richardson TX 75080 Up til now needed thick CA make whatever could get Because extra-thick cyanoacrylate youve asking finally CG Slow Jet made professional standards formulation quality control right USA made sure just way wanted before sold drop Give Slow Jet try think youll agree extra care weve given reallyCARL GOLDBERG does makeabigMODELS INC difference FF Old-Timers/Haught Continued page 61 has forwarded sample new version miniature coil having new hightemperature insulation primary windings new coil designed prolonged engine runs typical RC Assist order cope higher tem perature build-up due longer usual engine runs have using Gettig coils since introduction Free Flight applications have experienced problems whatsoever engine runs have seldom 4735 WEST CHICAGO AVE CHICAGO IL 60651 exceeded 20 seconds counting ground adjustment time concerned temperature build-up long engine runs will able purchase new coil fall Gettig ignition components godsend small Free Flight models weight critical RC fliers will also find helpful reducing all-up weight radio-laden model Martin now considering manufactur ing twin coil enough people inter ested good news let Martin know will help him decide market exists RC Free Flight remember few years LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks required change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessions elsewhere including Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS Cli MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 COMPLETE THIS FOAM AND ATTACH MAILING LABEL FROM RECENT ISSUE September1985 137 Introducing Slow Jet extra-thick CA glue Carl Goldberg