LAST MONTH covered basics finding Scale kit locate Scale plans scratchbuilding uncover source data making plans month well take simplified look Sport Scale rules might influence choice model aim pro vide overview rules setting stage review better understand specific regulations set down AMA 1988-89 Competition Regulations ka rule book As youll recall last months column proposed Sport Scale scoresheets judg ing done two phasesstatic judging max 100 points flight judging max 100 points As can see both judging categories have same maximum 100 points making equally important attaining good overall score event Model requirements few Scale model must replica heavier air mancarrying aircraft actually flew Static judging done distance 15 ft Therefore ex treme detail such extensive panel lines rivet patterns etc isnt really needed can clearly seen prescribed judging distance Moreover rules state cockpit detail included model judged rule developed because certain degree detail can seen 15 ft away elim inating extensive cockpit surface details will reduce work anxieties newcomers Scale detail required cockpit pilot least bust pilot vis ible prototype during flight Profile fuselages permitted However judges will appropriately downgrade score lack cross section shape models en gine must equipped muffler silencer limit noise Ducted fans electric motors exempt muffler requirement Static judging conducted three categories Accuracy Outline 40 points max Craftsman ship 30 points max Finish Color Markings 30 points max Accuracy Outline eligible Accu racy Outline points must provide judges following three- view drawing selection photographs show side front plan views commercially available unpainted unmodi fied plastic model prototype cant furnish above no points will awarded accuracy outline can see its very important pick subject/model can documented docu mentation unavailable would wise select another subject Craftsmanship requires no specific documenta tion Scoring category done strictly basis appearance influenced overall model completed both con struction finish Note points will awarded craftsmanship no proof-ofscale and/or finish color markings data supplied Finish Color Markings data must sup plied youre going win points cate gory Proof color scheme must given judges following forms photo photos 2 magazine other published color painting drawing 3 three-view drawing used accuracy outline may also con tain necessary data support color markings applied model 4 detailed writ ten description color scheme and/or mark ings reliable source no visual documen tation available Note no points will awarded Finish Color Markings documentation pro vided Once again cant document should consider choosing another airplane Thirty points too much give up con test Flight judging flight plan consists 10 maneuvers four obligatory other six chosen contestant based type model Obligatory maneuvers Takeoff 10 pts max Airborne Laps Pt per complete lap 10 pts max Landing 10 pts max Real ism Flight 10 pts max six optional maneuvers can performed during after 10 airborne laps before landing may include acrobatic maneuver flight op eration typical prototype aircraft such engine control wing flap operation retract extend landing gear taxi bomb fuel tank drops touch-and-go multiengine sequences Other less common options might banner tow ing crop dusting flight maneuvers operational features scored scale 0-10 based well performed relative prototype well scalelike qualities three options scored scale 0-20 two options Continued page 179 Ron Gillam Tucson AZ Sterling Kit Corsair L Span 36 power K&B 40 functional scale exhaust Model fin ished Aerogloss over silk weighs 3 Ju-88 Roland Baltes San Pedro CA middle photo B-26 R Marvin Martinez Phoenix AZ scratch-built American Modeler plans 10 years old Two 05 35 RC engines amply power 7-lb model October 1989 79 Control Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 Scratch-built Howard OGA Sam Abdow Fall River MA real looker good exam ple simple well-constructed finely finished model Birds done well during competition East Coast months discussion Sport Scale rules points out type model can compete sophisticated military planes Photo Boss Czech much will less crystal-clear average modeler apol ogize verbal inadequacies urge builder carefully examine model photos plan help clarify things may also write Mr Koutny ques tions tell him about model Bill Warner Footnotes following notes pre sented Mr Koutnys exact words al low various interpretations better gliding stability good right half wing tip has some slimmer aerofoil opposite left 2 Make Czech hook axis poly styrene better opposite some cor don needed perfect rubber prop working pattern correct blade angles adjustment pitch 0160mm 350mm good elevator has little twist 2mm enough 5Engine 12g FAI rubber 6 x /24 x %2 flight undercarriage 8 x A4 x Y32 ROG CL Scale/Boss Continued page 79 touch-and-go taxi lap retract extend landing gear Because flight portion event counts half total score importance choos ing model good flying characteristics will readily apparent course capability experience person holding control han dle play large part success failure model flight key word pracrice point might worthwhile inject extra thought flight portion event Much has said past about military fighter multiengine models having advan tage over less sophisticated civilian-type air craft during flight portion competition dont think thats entirely true because aircraft basically simple de signs yet compete effectively against phisticated types simplest subjects judged four obligatory maneuvers finding maneu vers fill out six optional selections can chosen options listed AMA FAI Scale rules should present little difficulty Most models capable taxiing two options performing touch-and-go two options engine control engine cutoff option Thats five six options needed last option could depending subject modeled operation wing flaps crop dusting other similar maneuver summary should choose model can documented both Accuracy Outline Finish Color Markings has neces sary features options filling out flight plan has good flight characteristics youre careful selecting subject gath ering data youre able fill out flight plan well learn flight characteris tics model youll rewarded K NARROW BAID V SITS A9 84Computer Ingenuity Intended serious flyer PCM 9 offers few compromises wfth some novative features have changed standards radio systems will judged transmftter hasthe lookandfeelofahigh performance no nonsense piece equipment control sticks supported two ball bearings axis ot movement adjustable length Frequencies can quickly changed swapping modules servo direction travel adjustable nine channels direct servo controller allows operation radio ground someone else uses same frequency Both pattern helicopter versions have programmable fail safe systems use 1991 ready PCM ABC&W receivers Both versions come wTh four 4001 servos rechargeable transmitter airborne batteries full servo mounting hardware swch harness Available now through ic,flJllCSw local hobby dealer yesterdays prices Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3 72 6 1-217-355-0058 October 1989 179 Analog Flexibility hours good flying great sense selfsatisfaction Once again must credit thank Gerry Deneau Aurora CO lions share ideas thoughts presentation Sport Scale rules Sport Scale Scoresheet Committee has formed Response request help standardizing Sport Scale scoresheet competition rule book has good following will serve committee Gerry Deneau 6464 So Andes P1 Aurora CO 80016 Charles Bauer 4944 No Orange Aye Norride IL 60656 Mike Welshans 976 Pear son Ferndale MI 48220 William Rammage 411 North 5th Ave Tucson AZ 85705 writer address top column have ideas suggestions concerning Sport Scale scoresheets appeared July 89 column am sure abovenamed would glad hear Dont miss out opportunity heard Please send ideas contest reports especially photos CL Scale address found very top column CL Aerobatics/Fancher Continued page 80 ditional lift cause wings fly level early Stunters common cure con siderable amount wing asymmetry deBolt designed American Sr instance inboard wing nearly three inches longer outboard utilized no tip weight Ares Chief Nobler others vintage era inboard wings roughly two inches longer anywhere zero ounce wing tip weight lighter overall weight less lip weight would called ships wingspans roughly 50 very competitive time Modern Stunters much larger span aver aging 60 often have little no asymmetry Equal-span wings common designers advocate reasons germane current discussion com mon denominator equal- nearly span ships need significant amounts tip weight Three four ounces often necessary counteract additional lift faster flying equal-size outboard wing So far problem its solution seem sim ple outboard wing too large flies high because its excess lift simply load down tip weight until dont no mo lem solved yes Well actly Unfortunately three-ounce whatever tip weight weighs three ounces level flight Any time maneuver ship de velop significant acceleration G loads three-ounce mass proportionately multi plied Because wing tip weight concentrated mass high-density material located fafr lat eral distance models CG its effect greater mass inboard wing statically balances one-G level flight 15G hard corner becomes 45 ozand thats good news bad news apologies Paul Walker since 45 oz generated 30 outboard center-of-gravity gen erates rolling moment about CG result tendency bank away pilot during maneuvers Stunters call banking tendency hinging Hinging ob vious during hard corners such bottom right Triangle outboard wing might drop far visible pilot its major error expert pilot should recognize undesirable trim con dition might adversely affect score should able properly evaluate correct correctly diagnose hinging important observe three distinct symptoms First level flightboth upright invert edthe wings should absolutely level outboard wing up plane attitude down its opposite attitude have warp must corrected its up both waysor down both waystip weight should added subtracted appropriate step assures static balance tip weight lift correct level flight Second accurately possible must certained lead-outs correctly placed Improperly located lead-outs especially too far aft can also induce hinging good ballpark cri teria observe outboard wheel vis ible just slightly aft inboard calm air assuming landing gear accurately aligned start ordinary 35- 60-powered ship midpoint lead-outs falls within 1 1 aft CG mea sured wing tip can consider ade quate purpose Thirdand importantyou must consist ently observe bottom outboard wing visible inside maneuvers top visible outside maneuvers Perhaps obvious place observe intersec 180 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane fl PRECISION UEEPRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Duracraft Inc / 1007 Orchard Grove Drive Royal Oak MI 48067 DuraPlane IlThe trainer rugged enough teach entire club fly Tell hobby shop owner want see toughest model aiplane money can buy LAIVI AFFORDABLE SPEED CONTROLS ala models speed controls fully proportional eIther dlreclloes Also Incoeporsled lallsaOe tImer whIch shuta down fIfe motor lIne eYed Irans mAter receIver receiver betlery faIlure Par AirplaneColepleleAssembled ModelsPerle KSadd Tented EKE24C$2150S2ao0 EKE24UWA$4150 EKEPB$4000$0000 Cars EKE7R$2500$3100 EKE7RM$2600$3200 EKE-PR$4050$5000 EKE-PB$4000$5050 RBV4$1095$1995 RBV-4 ON BOARD VOLTMETER assembled unlle carry s lull 90-day warreoly Please 5004 $200 pososge end hendllog per order Send SASE lnlormetloo Mall orders 10 ELDEN-KEN ELECTRONICS INC PO BOX 1853 Aroeds Coloredo 90001 cell today 1302 4311228 VIa d htaicd ocnpd plus 4% Control Line lers e ng Mote ~Fioishing FriendToolsAd ustab e Rudde No Contntl NornsCtnt o L ne 4 hIeevyOotBellcrenksNandles AdjuotobleLeadtultuidestlatoic Ails luslom Motor Motols ajlb much ouch Aluminum losertt INSAAPA55tD QuALITYIAAAANTtLO SATISFACTION Seod same address $100 receive new eopaoded calolotaod will tel $2 NA ott first order iYCroftaan Modets rIo 1311 16101 Woam Iia 46074 dualer inqairios toiled
Edition: Model Aviation - 1989/10
Page Numbers: 79, 179, 180
LAST MONTH covered basics finding Scale kit locate Scale plans scratchbuilding uncover source data making plans month well take simplified look Sport Scale rules might influence choice model aim pro vide overview rules setting stage review better understand specific regulations set down AMA 1988-89 Competition Regulations ka rule book As youll recall last months column proposed Sport Scale scoresheets judg ing done two phasesstatic judging max 100 points flight judging max 100 points As can see both judging categories have same maximum 100 points making equally important attaining good overall score event Model requirements few Scale model must replica heavier air mancarrying aircraft actually flew Static judging done distance 15 ft Therefore ex treme detail such extensive panel lines rivet patterns etc isnt really needed can clearly seen prescribed judging distance Moreover rules state cockpit detail included model judged rule developed because certain degree detail can seen 15 ft away elim inating extensive cockpit surface details will reduce work anxieties newcomers Scale detail required cockpit pilot least bust pilot vis ible prototype during flight Profile fuselages permitted However judges will appropriately downgrade score lack cross section shape models en gine must equipped muffler silencer limit noise Ducted fans electric motors exempt muffler requirement Static judging conducted three categories Accuracy Outline 40 points max Craftsman ship 30 points max Finish Color Markings 30 points max Accuracy Outline eligible Accu racy Outline points must provide judges following three- view drawing selection photographs show side front plan views commercially available unpainted unmodi fied plastic model prototype cant furnish above no points will awarded accuracy outline can see its very important pick subject/model can documented docu mentation unavailable would wise select another subject Craftsmanship requires no specific documenta tion Scoring category done strictly basis appearance influenced overall model completed both con struction finish Note points will awarded craftsmanship no proof-ofscale and/or finish color markings data supplied Finish Color Markings data must sup plied youre going win points cate gory Proof color scheme must given judges following forms photo photos 2 magazine other published color painting drawing 3 three-view drawing used accuracy outline may also con tain necessary data support color markings applied model 4 detailed writ ten description color scheme and/or mark ings reliable source no visual documen tation available Note no points will awarded Finish Color Markings documentation pro vided Once again cant document should consider choosing another airplane Thirty points too much give up con test Flight judging flight plan consists 10 maneuvers four obligatory other six chosen contestant based type model Obligatory maneuvers Takeoff 10 pts max Airborne Laps Pt per complete lap 10 pts max Landing 10 pts max Real ism Flight 10 pts max six optional maneuvers can performed during after 10 airborne laps before landing may include acrobatic maneuver flight op eration typical prototype aircraft such engine control wing flap operation retract extend landing gear taxi bomb fuel tank drops touch-and-go multiengine sequences Other less common options might banner tow ing crop dusting flight maneuvers operational features scored scale 0-10 based well performed relative prototype well scalelike qualities three options scored scale 0-20 two options Continued page 179 Ron Gillam Tucson AZ Sterling Kit Corsair L Span 36 power K&B 40 functional scale exhaust Model fin ished Aerogloss over silk weighs 3 Ju-88 Roland Baltes San Pedro CA middle photo B-26 R Marvin Martinez Phoenix AZ scratch-built American Modeler plans 10 years old Two 05 35 RC engines amply power 7-lb model October 1989 79 Control Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 Scratch-built Howard OGA Sam Abdow Fall River MA real looker good exam ple simple well-constructed finely finished model Birds done well during competition East Coast months discussion Sport Scale rules points out type model can compete sophisticated military planes Photo Boss Czech much will less crystal-clear average modeler apol ogize verbal inadequacies urge builder carefully examine model photos plan help clarify things may also write Mr Koutny ques tions tell him about model Bill Warner Footnotes following notes pre sented Mr Koutnys exact words al low various interpretations better gliding stability good right half wing tip has some slimmer aerofoil opposite left 2 Make Czech hook axis poly styrene better opposite some cor don needed perfect rubber prop working pattern correct blade angles adjustment pitch 0160mm 350mm good elevator has little twist 2mm enough 5Engine 12g FAI rubber 6 x /24 x %2 flight undercarriage 8 x A4 x Y32 ROG CL Scale/Boss Continued page 79 touch-and-go taxi lap retract extend landing gear Because flight portion event counts half total score importance choos ing model good flying characteristics will readily apparent course capability experience person holding control han dle play large part success failure model flight key word pracrice point might worthwhile inject extra thought flight portion event Much has said past about military fighter multiengine models having advan tage over less sophisticated civilian-type air craft during flight portion competition dont think thats entirely true because aircraft basically simple de signs yet compete effectively against phisticated types simplest subjects judged four obligatory maneuvers finding maneu vers fill out six optional selections can chosen options listed AMA FAI Scale rules should present little difficulty Most models capable taxiing two options performing touch-and-go two options engine control engine cutoff option Thats five six options needed last option could depending subject modeled operation wing flaps crop dusting other similar maneuver summary should choose model can documented both Accuracy Outline Finish Color Markings has neces sary features options filling out flight plan has good flight characteristics youre careful selecting subject gath ering data youre able fill out flight plan well learn flight characteris tics model youll rewarded K NARROW BAID V SITS A9 84Computer Ingenuity Intended serious flyer PCM 9 offers few compromises wfth some novative features have changed standards radio systems will judged transmftter hasthe lookandfeelofahigh performance no nonsense piece equipment control sticks supported two ball bearings axis ot movement adjustable length Frequencies can quickly changed swapping modules servo direction travel adjustable nine channels direct servo controller allows operation radio ground someone else uses same frequency Both pattern helicopter versions have programmable fail safe systems use 1991 ready PCM ABC&W receivers Both versions come wTh four 4001 servos rechargeable transmitter airborne batteries full servo mounting hardware swch harness Available now through ic,flJllCSw local hobby dealer yesterdays prices Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3 72 6 1-217-355-0058 October 1989 179 Analog Flexibility hours good flying great sense selfsatisfaction Once again must credit thank Gerry Deneau Aurora CO lions share ideas thoughts presentation Sport Scale rules Sport Scale Scoresheet Committee has formed Response request help standardizing Sport Scale scoresheet competition rule book has good following will serve committee Gerry Deneau 6464 So Andes P1 Aurora CO 80016 Charles Bauer 4944 No Orange Aye Norride IL 60656 Mike Welshans 976 Pear son Ferndale MI 48220 William Rammage 411 North 5th Ave Tucson AZ 85705 writer address top column have ideas suggestions concerning Sport Scale scoresheets appeared July 89 column am sure abovenamed would glad hear Dont miss out opportunity heard Please send ideas contest reports especially photos CL Scale address found very top column CL Aerobatics/Fancher Continued page 80 ditional lift cause wings fly level early Stunters common cure con siderable amount wing asymmetry deBolt designed American Sr instance inboard wing nearly three inches longer outboard utilized no tip weight Ares Chief Nobler others vintage era inboard wings roughly two inches longer anywhere zero ounce wing tip weight lighter overall weight less lip weight would called ships wingspans roughly 50 very competitive time Modern Stunters much larger span aver aging 60 often have little no asymmetry Equal-span wings common designers advocate reasons germane current discussion com mon denominator equal- nearly span ships need significant amounts tip weight Three four ounces often necessary counteract additional lift faster flying equal-size outboard wing So far problem its solution seem sim ple outboard wing too large flies high because its excess lift simply load down tip weight until dont no mo lem solved yes Well actly Unfortunately three-ounce whatever tip weight weighs three ounces level flight Any time maneuver ship de velop significant acceleration G loads three-ounce mass proportionately multi plied Because wing tip weight concentrated mass high-density material located fafr lat eral distance models CG its effect greater mass inboard wing statically balances one-G level flight 15G hard corner becomes 45 ozand thats good news bad news apologies Paul Walker since 45 oz generated 30 outboard center-of-gravity gen erates rolling moment about CG result tendency bank away pilot during maneuvers Stunters call banking tendency hinging Hinging ob vious during hard corners such bottom right Triangle outboard wing might drop far visible pilot its major error expert pilot should recognize undesirable trim con dition might adversely affect score should able properly evaluate correct correctly diagnose hinging important observe three distinct symptoms First level flightboth upright invert edthe wings should absolutely level outboard wing up plane attitude down its opposite attitude have warp must corrected its up both waysor down both waystip weight should added subtracted appropriate step assures static balance tip weight lift correct level flight Second accurately possible must certained lead-outs correctly placed Improperly located lead-outs especially too far aft can also induce hinging good ballpark cri teria observe outboard wheel vis ible just slightly aft inboard calm air assuming landing gear accurately aligned start ordinary 35- 60-powered ship midpoint lead-outs falls within 1 1 aft CG mea sured wing tip can consider ade quate purpose Thirdand importantyou must consist ently observe bottom outboard wing visible inside maneuvers top visible outside maneuvers Perhaps obvious place observe intersec 180 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane fl PRECISION UEEPRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Duracraft Inc / 1007 Orchard Grove Drive Royal Oak MI 48067 DuraPlane IlThe trainer rugged enough teach entire club fly Tell hobby shop owner want see toughest model aiplane money can buy LAIVI AFFORDABLE SPEED CONTROLS ala models speed controls fully proportional eIther dlreclloes Also Incoeporsled lallsaOe tImer whIch shuta down fIfe motor lIne eYed Irans mAter receIver receiver betlery faIlure Par AirplaneColepleleAssembled ModelsPerle KSadd Tented EKE24C$2150S2ao0 EKE24UWA$4150 EKEPB$4000$0000 Cars EKE7R$2500$3100 EKE7RM$2600$3200 EKE-PR$4050$5000 EKE-PB$4000$5050 RBV4$1095$1995 RBV-4 ON BOARD VOLTMETER assembled unlle carry s lull 90-day warreoly Please 5004 $200 pososge end hendllog per order Send SASE lnlormetloo Mall orders 10 ELDEN-KEN ELECTRONICS INC PO BOX 1853 Aroeds Coloredo 90001 cell today 1302 4311228 VIa d htaicd ocnpd plus 4% Control Line lers e ng Mote ~Fioishing FriendToolsAd ustab e Rudde No Contntl NornsCtnt o L ne 4 hIeevyOotBellcrenksNandles AdjuotobleLeadtultuidestlatoic Ails luslom Motor Motols ajlb much ouch Aluminum losertt INSAAPA55tD QuALITYIAAAANTtLO SATISFACTION Seod same address $100 receive new eopaoded calolotaod will tel $2 NA ott first order iYCroftaan Modets rIo 1311 16101 Woam Iia 46074 dualer inqairios toiled
Edition: Model Aviation - 1989/10
Page Numbers: 79, 179, 180
LAST MONTH covered basics finding Scale kit locate Scale plans scratchbuilding uncover source data making plans month well take simplified look Sport Scale rules might influence choice model aim pro vide overview rules setting stage review better understand specific regulations set down AMA 1988-89 Competition Regulations ka rule book As youll recall last months column proposed Sport Scale scoresheets judg ing done two phasesstatic judging max 100 points flight judging max 100 points As can see both judging categories have same maximum 100 points making equally important attaining good overall score event Model requirements few Scale model must replica heavier air mancarrying aircraft actually flew Static judging done distance 15 ft Therefore ex treme detail such extensive panel lines rivet patterns etc isnt really needed can clearly seen prescribed judging distance Moreover rules state cockpit detail included model judged rule developed because certain degree detail can seen 15 ft away elim inating extensive cockpit surface details will reduce work anxieties newcomers Scale detail required cockpit pilot least bust pilot vis ible prototype during flight Profile fuselages permitted However judges will appropriately downgrade score lack cross section shape models en gine must equipped muffler silencer limit noise Ducted fans electric motors exempt muffler requirement Static judging conducted three categories Accuracy Outline 40 points max Craftsman ship 30 points max Finish Color Markings 30 points max Accuracy Outline eligible Accu racy Outline points must provide judges following three- view drawing selection photographs show side front plan views commercially available unpainted unmodi fied plastic model prototype cant furnish above no points will awarded accuracy outline can see its very important pick subject/model can documented docu mentation unavailable would wise select another subject Craftsmanship requires no specific documenta tion Scoring category done strictly basis appearance influenced overall model completed both con struction finish Note points will awarded craftsmanship no proof-ofscale and/or finish color markings data supplied Finish Color Markings data must sup plied youre going win points cate gory Proof color scheme must given judges following forms photo photos 2 magazine other published color painting drawing 3 three-view drawing used accuracy outline may also con tain necessary data support color markings applied model 4 detailed writ ten description color scheme and/or mark ings reliable source no visual documen tation available Note no points will awarded Finish Color Markings documentation pro vided Once again cant document should consider choosing another airplane Thirty points too much give up con test Flight judging flight plan consists 10 maneuvers four obligatory other six chosen contestant based type model Obligatory maneuvers Takeoff 10 pts max Airborne Laps Pt per complete lap 10 pts max Landing 10 pts max Real ism Flight 10 pts max six optional maneuvers can performed during after 10 airborne laps before landing may include acrobatic maneuver flight op eration typical prototype aircraft such engine control wing flap operation retract extend landing gear taxi bomb fuel tank drops touch-and-go multiengine sequences Other less common options might banner tow ing crop dusting flight maneuvers operational features scored scale 0-10 based well performed relative prototype well scalelike qualities three options scored scale 0-20 two options Continued page 179 Ron Gillam Tucson AZ Sterling Kit Corsair L Span 36 power K&B 40 functional scale exhaust Model fin ished Aerogloss over silk weighs 3 Ju-88 Roland Baltes San Pedro CA middle photo B-26 R Marvin Martinez Phoenix AZ scratch-built American Modeler plans 10 years old Two 05 35 RC engines amply power 7-lb model October 1989 79 Control Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 Scratch-built Howard OGA Sam Abdow Fall River MA real looker good exam ple simple well-constructed finely finished model Birds done well during competition East Coast months discussion Sport Scale rules points out type model can compete sophisticated military planes Photo Boss Czech much will less crystal-clear average modeler apol ogize verbal inadequacies urge builder carefully examine model photos plan help clarify things may also write Mr Koutny ques tions tell him about model Bill Warner Footnotes following notes pre sented Mr Koutnys exact words al low various interpretations better gliding stability good right half wing tip has some slimmer aerofoil opposite left 2 Make Czech hook axis poly styrene better opposite some cor don needed perfect rubber prop working pattern correct blade angles adjustment pitch 0160mm 350mm good elevator has little twist 2mm enough 5Engine 12g FAI rubber 6 x /24 x %2 flight undercarriage 8 x A4 x Y32 ROG CL Scale/Boss Continued page 79 touch-and-go taxi lap retract extend landing gear Because flight portion event counts half total score importance choos ing model good flying characteristics will readily apparent course capability experience person holding control han dle play large part success failure model flight key word pracrice point might worthwhile inject extra thought flight portion event Much has said past about military fighter multiengine models having advan tage over less sophisticated civilian-type air craft during flight portion competition dont think thats entirely true because aircraft basically simple de signs yet compete effectively against phisticated types simplest subjects judged four obligatory maneuvers finding maneu vers fill out six optional selections can chosen options listed AMA FAI Scale rules should present little difficulty Most models capable taxiing two options performing touch-and-go two options engine control engine cutoff option Thats five six options needed last option could depending subject modeled operation wing flaps crop dusting other similar maneuver summary should choose model can documented both Accuracy Outline Finish Color Markings has neces sary features options filling out flight plan has good flight characteristics youre careful selecting subject gath ering data youre able fill out flight plan well learn flight characteris tics model youll rewarded K NARROW BAID V SITS A9 84Computer Ingenuity Intended serious flyer PCM 9 offers few compromises wfth some novative features have changed standards radio systems will judged transmftter hasthe lookandfeelofahigh performance no nonsense piece equipment control sticks supported two ball bearings axis ot movement adjustable length Frequencies can quickly changed swapping modules servo direction travel adjustable nine channels direct servo controller allows operation radio ground someone else uses same frequency Both pattern helicopter versions have programmable fail safe systems use 1991 ready PCM ABC&W receivers Both versions come wTh four 4001 servos rechargeable transmitter airborne batteries full servo mounting hardware swch harness Available now through ic,flJllCSw local hobby dealer yesterdays prices Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3 72 6 1-217-355-0058 October 1989 179 Analog Flexibility hours good flying great sense selfsatisfaction Once again must credit thank Gerry Deneau Aurora CO lions share ideas thoughts presentation Sport Scale rules Sport Scale Scoresheet Committee has formed Response request help standardizing Sport Scale scoresheet competition rule book has good following will serve committee Gerry Deneau 6464 So Andes P1 Aurora CO 80016 Charles Bauer 4944 No Orange Aye Norride IL 60656 Mike Welshans 976 Pear son Ferndale MI 48220 William Rammage 411 North 5th Ave Tucson AZ 85705 writer address top column have ideas suggestions concerning Sport Scale scoresheets appeared July 89 column am sure abovenamed would glad hear Dont miss out opportunity heard Please send ideas contest reports especially photos CL Scale address found very top column CL Aerobatics/Fancher Continued page 80 ditional lift cause wings fly level early Stunters common cure con siderable amount wing asymmetry deBolt designed American Sr instance inboard wing nearly three inches longer outboard utilized no tip weight Ares Chief Nobler others vintage era inboard wings roughly two inches longer anywhere zero ounce wing tip weight lighter overall weight less lip weight would called ships wingspans roughly 50 very competitive time Modern Stunters much larger span aver aging 60 often have little no asymmetry Equal-span wings common designers advocate reasons germane current discussion com mon denominator equal- nearly span ships need significant amounts tip weight Three four ounces often necessary counteract additional lift faster flying equal-size outboard wing So far problem its solution seem sim ple outboard wing too large flies high because its excess lift simply load down tip weight until dont no mo lem solved yes Well actly Unfortunately three-ounce whatever tip weight weighs three ounces level flight Any time maneuver ship de velop significant acceleration G loads three-ounce mass proportionately multi plied Because wing tip weight concentrated mass high-density material located fafr lat eral distance models CG its effect greater mass inboard wing statically balances one-G level flight 15G hard corner becomes 45 ozand thats good news bad news apologies Paul Walker since 45 oz generated 30 outboard center-of-gravity gen erates rolling moment about CG result tendency bank away pilot during maneuvers Stunters call banking tendency hinging Hinging ob vious during hard corners such bottom right Triangle outboard wing might drop far visible pilot its major error expert pilot should recognize undesirable trim con dition might adversely affect score should able properly evaluate correct correctly diagnose hinging important observe three distinct symptoms First level flightboth upright invert edthe wings should absolutely level outboard wing up plane attitude down its opposite attitude have warp must corrected its up both waysor down both waystip weight should added subtracted appropriate step assures static balance tip weight lift correct level flight Second accurately possible must certained lead-outs correctly placed Improperly located lead-outs especially too far aft can also induce hinging good ballpark cri teria observe outboard wheel vis ible just slightly aft inboard calm air assuming landing gear accurately aligned start ordinary 35- 60-powered ship midpoint lead-outs falls within 1 1 aft CG mea sured wing tip can consider ade quate purpose Thirdand importantyou must consist ently observe bottom outboard wing visible inside maneuvers top visible outside maneuvers Perhaps obvious place observe intersec 180 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane fl PRECISION UEEPRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Duracraft Inc / 1007 Orchard Grove Drive Royal Oak MI 48067 DuraPlane IlThe trainer rugged enough teach entire club fly Tell hobby shop owner want see toughest model aiplane money can buy LAIVI AFFORDABLE SPEED CONTROLS ala models speed controls fully proportional eIther dlreclloes Also Incoeporsled lallsaOe tImer whIch shuta down fIfe motor lIne eYed Irans mAter receIver receiver betlery faIlure Par AirplaneColepleleAssembled ModelsPerle KSadd Tented EKE24C$2150S2ao0 EKE24UWA$4150 EKEPB$4000$0000 Cars EKE7R$2500$3100 EKE7RM$2600$3200 EKE-PR$4050$5000 EKE-PB$4000$5050 RBV4$1095$1995 RBV-4 ON BOARD VOLTMETER assembled unlle carry s lull 90-day warreoly Please 5004 $200 pososge end hendllog per order Send SASE lnlormetloo Mall orders 10 ELDEN-KEN ELECTRONICS INC PO BOX 1853 Aroeds Coloredo 90001 cell today 1302 4311228 VIa d htaicd ocnpd plus 4% Control Line lers e ng Mote ~Fioishing FriendToolsAd ustab e Rudde No Contntl NornsCtnt o L ne 4 hIeevyOotBellcrenksNandles AdjuotobleLeadtultuidestlatoic Ails luslom Motor Motols ajlb much ouch Aluminum losertt INSAAPA55tD QuALITYIAAAANTtLO SATISFACTION Seod same address $100 receive new eopaoded calolotaod will tel $2 NA ott first order iYCroftaan Modets rIo 1311 16101 Woam Iia 46074 dualer inqairios toiled