FREE FLIGHT DURATION WT YOU MEAN theres no radio have ever tried explain Free Flight nonmodeler someone familiar Radio Control Control Line Im sure youve heard response its often followed question keep crashing Free Flight model simplest Hand-Launched Glider actually performing delicate balancing act flight Through years us fly Free Flight have learned often trial error make very small adjustments model make fly crashing also climb highest glide best have learned adjust models seek Out thermals avoid downdrafts Lets examine ways have learned adjust model successful flight Hopefully will help explain challenges Free Flight readers familiar type model provide good review rest us column will discussing adjustments locked-up model timer torque-actuated auto rudder auto stab other variable geometry Auto surface-equipped models although slightly difficult build rig allow climb glide phases flight adjusted separately much simpler proposition locked-up model physical characteristic sets Free Flight models apart other models full-scale aircraft dihedral bent-up wings typical Free Flight model help stabilize roll axis allow circling flight spiraling Circling flight helps minimize distance model travels importantly allows model center thermals Simply stated dihedral works increasing lift low wing during bank decreasing lift high wing tending bring model out bank amount dihedral must closely balanced rudder area Too big rudder can cause model spiral easily offset rudder overpowers corrective effect dihedral Too small rudder other hand can result Dutch rolla series alternating part rolls direction trend over time has reduce 114 Model Aviation McCoys Jaguar Ted Evans design version Roy Chestersons 1948 Wakefield Cup winner destined Wakefield section AMA museum Bo Robinsons Mulvihill rubber model uses careful balance Ray Combs Spacer typifies locked-up power model adjustments control flight Photos Gil Fireagle must climb glide same fixed adjustments rudder area much possible getting Dutch roll problems gives model somewhat wandering glide turn felt conducive finding thermals look some rubber models 1930s will show other extreme rudders big half stab Perhaps thought necessary handle torque rubber motor during ROG Rise Off Ground takeoff Dihedral coupled rudder area increase dihedral need increase rudder area Other factors model design especially wing location can influence dihedral effect example high-winged model will need less dihedral low-winged model Thats Peanut Scale Fike can get away no dihedral P-5 Mustang might need bit scale dihedral stability Now have dihedral take care roll lets examine pitch axis Pitch nose-up nose-down aspect flight Now getting something really does look like balance short heavy nose balances longer lighter tail call balance point CG center gravity typical model somewhere between 50% 100% wings mean chord measured leading edge necessarily same models root chord Three-views Chesterson model Gerry Ritzs history Wakefield cup published 1953 International Competition Handbook 100% CG popular trim power models 1950s 1960s before auto surfaces became popular Balancing model trailing edge wing allowed model fly minimum decalage Decalage difference between incidence wing incidence stab model wing set 30 stab 2o would have decalage five degrees model wing set 3 degrees stab set 2 degrees would have decalage degree model CC 100% decalage usually just degree George Fullers Dixielander power model Only Dm1 US Hobby Full Line Model Airplanes Helicopters Boats Cars PIPER CUB J3/ARC 25-36 ALL WOOD CONST SPikE Wing Span 54 Length 36 $6995 Weight 3 SIbs Item#857-N441r JAGUAR 40/ARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS SME Wing Span 48 Length 40 Weight 48 lbs -57 lbs SKY BABY-L/ARF 25-35 2C TRAINER SAkE Wing Span 51 5 tength 36 Weight 3 3 lbs Items854 FIRE FLYARF 10-1520 GLOW INTHE DARK AFTER SUNSET SAkE Wing Span 40 Length 347 67 9 ght 22 lbs- 24 lbs Item #940 DEALERS AND DISTRIBUTORS INQUIRIES WELCOME LRDERLQNL 1400-249-0544 INFORMATION 1-201460-0544 24 HOUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY lOAM TO 7PM FRIDAY tO AM TO RPM SATURDAYS lOAM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NtW JERSEY RESIDENTS ADD 0% SALtS TAX US HOBBY INC 200 MOONACHIE AVE NOONACHIE NJ 07074 US HOBBY INC November1998 115 4411 LI ThlI UIIiHiI 11111111 -J 1948 WINNER ROY CHESTERTON ENGLAND JAGUAR 4OARFPIPER CUB J-3/ARF 40SKY BABY-S/ ARF YEi.OW ALL WOOD CONAT SAkE25-35 20 TRAINERSAkE Wng Span 51 5 Length 35 Wng Span 48 Length 40Wing Span 67 Length 43 eight 3 3 ibs Weight 48 Inn 571h ight 79 lbs Itemo8S2...S9tWg Itemn865B #867...jS669t II trim suggested balancing model trailing edge wing setting both wing stab same positive angle right main wing panel washed leading edge up provide slight amount decalage Now would want Lift increases speed Keeping decalage low reduces speed sensitivity As model accelerates climb wing lifts more stab lift didnt increase about same rate model would loop keeping decalage low stab increases its lift about same rate wing model climbs balancing act between wing stab easy involved just decalage area stab expressed percentage wing area important stab airfoil thickness Some power models 1950s such Civy Boy Royono used stabs 50 percent wing area very rearward CU sometimes behind wing trailing edge minimum decalage everything worked would get good climb good glide something went wrong result often straight-up-and-straight-down flight Increasing decalage slightly allowed forward CU safer forgiving model combining right turn left roll component spiral climb could obtained lessened looping tendency gave improved transition climb glide Later development auto stab would allow model climb minimum decalage faster straighter climb end engine run stab trailing edge would move up few degrees increasing decalage better glide power models auto surfaces power phase must adjusted first find correct decalage setting doesnt result loop nose-over dive glide adjusted moving center gravity since has less effect model high speed low speed brings up another factor essence makes Free Flight possible Some adjustments effective high speeds others effective low speeds general flying surface movements effective high speeds Rudder offsets decalage wing tail warps will increase effectiveness speed increases Thrustline adjustments CC shifts stab tilt will effective slow speeds high example 100 downthrust used Ramrod necessary pull model over vertical normal 6070 degree climb path VTO Vertical Take Off launch used Once model got up speed downthrust less effect Another example balancing speed-sensitive adjustments use right thrust left rudder Rubber model tow speed thrust effective rudder causing right turn high speed rudder takes over straightening out climb result seemingly automatic control climb model starts turn too tightly right especially level slightly nose-down attitude models airspeed will increase rudder will become effective straightening out climb causing model nose up model climbs too steeply begins stall airspeed will drop off right thrust will become effective rudder will pull model right turn nose will drop slightly keeping model stalling type adjustment must balance thrust offset rudder offset can use lot both little both Since Free Flight models fly circles need allow turning flight traditional way to wash wing inside turn slightly maintain extensive inventory 3W spare parts Quality repair service provided 3W factory trained technician oducing new Front Intake 3W Engihes pular 3W-l20iB2 3W-l40iB2 now available Front Intake motors ZOiB2-F $ 135000 OiB2-F $ l55a00 3W Engine among 4 Gants suit yotr particular needs r pefeerces t Scale Available July 1998 ning July 98 4OiB2$ Z295OQ3W-1551B4 4-CyIite%400 sfer ports 2 Spark Plugs pe Cylinder Stronger lighter tli Power 3W-l60B4 like TO C TOC Ss es G 202Wingspan 114 ches : d flown 1998TOC 41fgng Matt 202 features ated Fiberglass fuselage prebiilt winsSi stabs remowibte vefqr WuigtuI nd installed Ailerons elevator nd rudil Xt4y hinged LiridI er supo Firewall installed G 202Kit$ iSPOQ G 202with 3W I20iB2$ 3l&O G 202with 3W 4OiB2$3295OUhd$iping $ HaSdtlng Prisiibi h VAL INC Phone7327G1EO997Fax727t1485 116 Model Aviation rry Menz Propellers Bolly Carbon Fiber Propellers Call monthly specials wwwaircraftintlcom Remember washin means leading edge raised washout means leading edge twisted down relative rest wing Washing wing inside turn provides safety factor prevent spiral dives model begins spiral down washin will generate lift raising wing slowing spiral Washin allows model flown tighter turn would possible flat unwashed wings recent approach turning flight fly model very large glide circles allows more-efficient glide also allows model scan larger area looking lift models typically set up reverse wing washthe wing inside turn washed out slightly rather washed thought will cause model turn lift However type trim should never combined tight glide turn result will spiral dive can make model turn glide several ways rudder can deflected rudder can cambered lift desired direction stab can tilted relative wing Rudder adjustments mentioned earlier speed-sensitive Thats models use fine-thread screw adjusters control rudder movement Believe doesnt take much rudder movement show noticeable change flight especially during powered phase joke containing grain truth difference between power model crashing right crashing left turn 0-80 rudder screw much-less-sensitive way make model turn use stab tilt will cause model turn toward high side stab Since stab tilt effective low speed high can combined opposite rudder adjustment give desired flight pattern rudder controls power phase stab tilt controls glide thing remember using stab tilt shimming under front stab tilt will also affect incidence stab sure take consideration changing stab tilt Remember type adjustments model uses should considered beginning Wing washin washout well thrust adjustments should builtin Wings tails should keyed maintain alignment Adjusting model requires repeated flights making very slight adjustments get optimum trim during phases flight Try think through what effect adjustment will make adjustments time sure use plywood shims rather balsa can crush Always glue shims place much-more-detailed look adjusting Free Flight model read Frank Zaics Circular Airflow book written 1960s explores effects dihedral decalage other factors Free Flight model books should reread annual basis book available AMA Jaguar Ted Evans-designed Jaguar classic Wakefield winners just screams build Flown ex RAF Spitfire pilot Roy Chesterton model won Wakefield Cup first postwar championship held Cleveland 1948 model features diamond fuselage distinctive deep underbelly shoulder-mounted tapered wings span bit 44 inches length 35 inches prop freewheelinga typical feature British Rubber models era model used 14 strands /4-inch rubber 48 inches long motor wound 1120 turns giving 90-second motor run Roy s three-flight average 6 minutes 273 seconds Tom McCoy built replica new Wakefield International Cup Museum AMA headquarters Spearheaded Charles Dennis Rushing museum will chronicle history aeromodelings most-sought after trophy Toms model follows originals black-and-white color scheme includes authentic rudder decal Chestersons model club mber1998 119
Edition: Model Aviation - 1998/11
Page Numbers: 114, 115, 116, 119
Edition: Model Aviation - 1998/11
Page Numbers: 114, 115, 116, 119
FREE FLIGHT DURATION WT YOU MEAN theres no radio have ever tried explain Free Flight nonmodeler someone familiar Radio Control Control Line Im sure youve heard response its often followed question keep crashing Free Flight model simplest Hand-Launched Glider actually performing delicate balancing act flight Through years us fly Free Flight have learned often trial error make very small adjustments model make fly crashing also climb highest glide best have learned adjust models seek Out thermals avoid downdrafts Lets examine ways have learned adjust model successful flight Hopefully will help explain challenges Free Flight readers familiar type model provide good review rest us column will discussing adjustments locked-up model timer torque-actuated auto rudder auto stab other variable geometry Auto surface-equipped models although slightly difficult build rig allow climb glide phases flight adjusted separately much simpler proposition locked-up model physical characteristic sets Free Flight models apart other models full-scale aircraft dihedral bent-up wings typical Free Flight model help stabilize roll axis allow circling flight spiraling Circling flight helps minimize distance model travels importantly allows model center thermals Simply stated dihedral works increasing lift low wing during bank decreasing lift high wing tending bring model out bank amount dihedral must closely balanced rudder area Too big rudder can cause model spiral easily offset rudder overpowers corrective effect dihedral Too small rudder other hand can result Dutch rolla series alternating part rolls direction trend over time has reduce 114 Model Aviation McCoys Jaguar Ted Evans design version Roy Chestersons 1948 Wakefield Cup winner destined Wakefield section AMA museum Bo Robinsons Mulvihill rubber model uses careful balance Ray Combs Spacer typifies locked-up power model adjustments control flight Photos Gil Fireagle must climb glide same fixed adjustments rudder area much possible getting Dutch roll problems gives model somewhat wandering glide turn felt conducive finding thermals look some rubber models 1930s will show other extreme rudders big half stab Perhaps thought necessary handle torque rubber motor during ROG Rise Off Ground takeoff Dihedral coupled rudder area increase dihedral need increase rudder area Other factors model design especially wing location can influence dihedral effect example high-winged model will need less dihedral low-winged model Thats Peanut Scale Fike can get away no dihedral P-5 Mustang might need bit scale dihedral stability Now have dihedral take care roll lets examine pitch axis Pitch nose-up nose-down aspect flight Now getting something really does look like balance short heavy nose balances longer lighter tail call balance point CG center gravity typical model somewhere between 50% 100% wings mean chord measured leading edge necessarily same models root chord Three-views Chesterson model Gerry Ritzs history Wakefield cup published 1953 International Competition Handbook 100% CG popular trim power models 1950s 1960s before auto surfaces became popular Balancing model trailing edge wing allowed model fly minimum decalage Decalage difference between incidence wing incidence stab model wing set 30 stab 2o would have decalage five degrees model wing set 3 degrees stab set 2 degrees would have decalage degree model CC 100% decalage usually just degree George Fullers Dixielander power model Only Dm1 US Hobby Full Line Model Airplanes Helicopters Boats Cars PIPER CUB J3/ARC 25-36 ALL WOOD CONST SPikE Wing Span 54 Length 36 $6995 Weight 3 SIbs Item#857-N441r JAGUAR 40/ARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS SME Wing Span 48 Length 40 Weight 48 lbs -57 lbs SKY BABY-L/ARF 25-35 2C TRAINER SAkE Wing Span 51 5 tength 36 Weight 3 3 lbs Items854 FIRE FLYARF 10-1520 GLOW INTHE DARK AFTER SUNSET SAkE Wing Span 40 Length 347 67 9 ght 22 lbs- 24 lbs Item #940 DEALERS AND DISTRIBUTORS INQUIRIES WELCOME LRDERLQNL 1400-249-0544 INFORMATION 1-201460-0544 24 HOUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY lOAM TO 7PM FRIDAY tO AM TO RPM SATURDAYS lOAM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NtW JERSEY RESIDENTS ADD 0% SALtS TAX US HOBBY INC 200 MOONACHIE AVE NOONACHIE NJ 07074 US HOBBY INC November1998 115 4411 LI ThlI UIIiHiI 11111111 -J 1948 WINNER ROY CHESTERTON ENGLAND JAGUAR 4OARFPIPER CUB J-3/ARF 40SKY BABY-S/ ARF YEi.OW ALL WOOD CONAT SAkE25-35 20 TRAINERSAkE Wng Span 51 5 Length 35 Wng Span 48 Length 40Wing Span 67 Length 43 eight 3 3 ibs Weight 48 Inn 571h ight 79 lbs Itemo8S2...S9tWg Itemn865B #867...jS669t II trim suggested balancing model trailing edge wing setting both wing stab same positive angle right main wing panel washed leading edge up provide slight amount decalage Now would want Lift increases speed Keeping decalage low reduces speed sensitivity As model accelerates climb wing lifts more stab lift didnt increase about same rate model would loop keeping decalage low stab increases its lift about same rate wing model climbs balancing act between wing stab easy involved just decalage area stab expressed percentage wing area important stab airfoil thickness Some power models 1950s such Civy Boy Royono used stabs 50 percent wing area very rearward CU sometimes behind wing trailing edge minimum decalage everything worked would get good climb good glide something went wrong result often straight-up-and-straight-down flight Increasing decalage slightly allowed forward CU safer forgiving model combining right turn left roll component spiral climb could obtained lessened looping tendency gave improved transition climb glide Later development auto stab would allow model climb minimum decalage faster straighter climb end engine run stab trailing edge would move up few degrees increasing decalage better glide power models auto surfaces power phase must adjusted first find correct decalage setting doesnt result loop nose-over dive glide adjusted moving center gravity since has less effect model high speed low speed brings up another factor essence makes Free Flight possible Some adjustments effective high speeds others effective low speeds general flying surface movements effective high speeds Rudder offsets decalage wing tail warps will increase effectiveness speed increases Thrustline adjustments CC shifts stab tilt will effective slow speeds high example 100 downthrust used Ramrod necessary pull model over vertical normal 6070 degree climb path VTO Vertical Take Off launch used Once model got up speed downthrust less effect Another example balancing speed-sensitive adjustments use right thrust left rudder Rubber model tow speed thrust effective rudder causing right turn high speed rudder takes over straightening out climb result seemingly automatic control climb model starts turn too tightly right especially level slightly nose-down attitude models airspeed will increase rudder will become effective straightening out climb causing model nose up model climbs too steeply begins stall airspeed will drop off right thrust will become effective rudder will pull model right turn nose will drop slightly keeping model stalling type adjustment must balance thrust offset rudder offset can use lot both little both Since Free Flight models fly circles need allow turning flight traditional way to wash wing inside turn slightly maintain extensive inventory 3W spare parts Quality repair service provided 3W factory trained technician oducing new Front Intake 3W Engihes pular 3W-l20iB2 3W-l40iB2 now available Front Intake motors ZOiB2-F $ 135000 OiB2-F $ l55a00 3W Engine among 4 Gants suit yotr particular needs r pefeerces t Scale Available July 1998 ning July 98 4OiB2$ Z295OQ3W-1551B4 4-CyIite%400 sfer ports 2 Spark Plugs pe Cylinder Stronger lighter tli Power 3W-l60B4 like TO C TOC Ss es G 202Wingspan 114 ches : d flown 1998TOC 41fgng Matt 202 features ated Fiberglass fuselage prebiilt winsSi stabs remowibte vefqr WuigtuI nd installed Ailerons elevator nd rudil Xt4y hinged LiridI er supo Firewall installed G 202Kit$ iSPOQ G 202with 3W I20iB2$ 3l&O G 202with 3W 4OiB2$3295OUhd$iping $ HaSdtlng Prisiibi h VAL INC Phone7327G1EO997Fax727t1485 116 Model Aviation rry Menz Propellers Bolly Carbon Fiber Propellers Call monthly specials wwwaircraftintlcom Remember washin means leading edge raised washout means leading edge twisted down relative rest wing Washing wing inside turn provides safety factor prevent spiral dives model begins spiral down washin will generate lift raising wing slowing spiral Washin allows model flown tighter turn would possible flat unwashed wings recent approach turning flight fly model very large glide circles allows more-efficient glide also allows model scan larger area looking lift models typically set up reverse wing washthe wing inside turn washed out slightly rather washed thought will cause model turn lift However type trim should never combined tight glide turn result will spiral dive can make model turn glide several ways rudder can deflected rudder can cambered lift desired direction stab can tilted relative wing Rudder adjustments mentioned earlier speed-sensitive Thats models use fine-thread screw adjusters control rudder movement Believe doesnt take much rudder movement show noticeable change flight especially during powered phase joke containing grain truth difference between power model crashing right crashing left turn 0-80 rudder screw much-less-sensitive way make model turn use stab tilt will cause model turn toward high side stab Since stab tilt effective low speed high can combined opposite rudder adjustment give desired flight pattern rudder controls power phase stab tilt controls glide thing remember using stab tilt shimming under front stab tilt will also affect incidence stab sure take consideration changing stab tilt Remember type adjustments model uses should considered beginning Wing washin washout well thrust adjustments should builtin Wings tails should keyed maintain alignment Adjusting model requires repeated flights making very slight adjustments get optimum trim during phases flight Try think through what effect adjustment will make adjustments time sure use plywood shims rather balsa can crush Always glue shims place much-more-detailed look adjusting Free Flight model read Frank Zaics Circular Airflow book written 1960s explores effects dihedral decalage other factors Free Flight model books should reread annual basis book available AMA Jaguar Ted Evans-designed Jaguar classic Wakefield winners just screams build Flown ex RAF Spitfire pilot Roy Chesterton model won Wakefield Cup first postwar championship held Cleveland 1948 model features diamond fuselage distinctive deep underbelly shoulder-mounted tapered wings span bit 44 inches length 35 inches prop freewheelinga typical feature British Rubber models era model used 14 strands /4-inch rubber 48 inches long motor wound 1120 turns giving 90-second motor run Roy s three-flight average 6 minutes 273 seconds Tom McCoy built replica new Wakefield International Cup Museum AMA headquarters Spearheaded Charles Dennis Rushing museum will chronicle history aeromodelings most-sought after trophy Toms model follows originals black-and-white color scheme includes authentic rudder decal Chestersons model club mber1998 119
Edition: Model Aviation - 1998/11
Page Numbers: 114, 115, 116, 119
FREE FLIGHT DURATION WT YOU MEAN theres no radio have ever tried explain Free Flight nonmodeler someone familiar Radio Control Control Line Im sure youve heard response its often followed question keep crashing Free Flight model simplest Hand-Launched Glider actually performing delicate balancing act flight Through years us fly Free Flight have learned often trial error make very small adjustments model make fly crashing also climb highest glide best have learned adjust models seek Out thermals avoid downdrafts Lets examine ways have learned adjust model successful flight Hopefully will help explain challenges Free Flight readers familiar type model provide good review rest us column will discussing adjustments locked-up model timer torque-actuated auto rudder auto stab other variable geometry Auto surface-equipped models although slightly difficult build rig allow climb glide phases flight adjusted separately much simpler proposition locked-up model physical characteristic sets Free Flight models apart other models full-scale aircraft dihedral bent-up wings typical Free Flight model help stabilize roll axis allow circling flight spiraling Circling flight helps minimize distance model travels importantly allows model center thermals Simply stated dihedral works increasing lift low wing during bank decreasing lift high wing tending bring model out bank amount dihedral must closely balanced rudder area Too big rudder can cause model spiral easily offset rudder overpowers corrective effect dihedral Too small rudder other hand can result Dutch rolla series alternating part rolls direction trend over time has reduce 114 Model Aviation McCoys Jaguar Ted Evans design version Roy Chestersons 1948 Wakefield Cup winner destined Wakefield section AMA museum Bo Robinsons Mulvihill rubber model uses careful balance Ray Combs Spacer typifies locked-up power model adjustments control flight Photos Gil Fireagle must climb glide same fixed adjustments rudder area much possible getting Dutch roll problems gives model somewhat wandering glide turn felt conducive finding thermals look some rubber models 1930s will show other extreme rudders big half stab Perhaps thought necessary handle torque rubber motor during ROG Rise Off Ground takeoff Dihedral coupled rudder area increase dihedral need increase rudder area Other factors model design especially wing location can influence dihedral effect example high-winged model will need less dihedral low-winged model Thats Peanut Scale Fike can get away no dihedral P-5 Mustang might need bit scale dihedral stability Now have dihedral take care roll lets examine pitch axis Pitch nose-up nose-down aspect flight Now getting something really does look like balance short heavy nose balances longer lighter tail call balance point CG center gravity typical model somewhere between 50% 100% wings mean chord measured leading edge necessarily same models root chord Three-views Chesterson model Gerry Ritzs history Wakefield cup published 1953 International Competition Handbook 100% CG popular trim power models 1950s 1960s before auto surfaces became popular Balancing model trailing edge wing allowed model fly minimum decalage Decalage difference between incidence wing incidence stab model wing set 30 stab 2o would have decalage five degrees model wing set 3 degrees stab set 2 degrees would have decalage degree model CC 100% decalage usually just degree George Fullers Dixielander power model Only Dm1 US Hobby Full Line Model Airplanes Helicopters Boats Cars PIPER CUB J3/ARC 25-36 ALL WOOD CONST SPikE Wing Span 54 Length 36 $6995 Weight 3 SIbs Item#857-N441r JAGUAR 40/ARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS SME Wing Span 48 Length 40 Weight 48 lbs -57 lbs SKY BABY-L/ARF 25-35 2C TRAINER SAkE Wing Span 51 5 tength 36 Weight 3 3 lbs Items854 FIRE FLYARF 10-1520 GLOW INTHE DARK AFTER SUNSET SAkE Wing Span 40 Length 347 67 9 ght 22 lbs- 24 lbs Item #940 DEALERS AND DISTRIBUTORS INQUIRIES WELCOME LRDERLQNL 1400-249-0544 INFORMATION 1-201460-0544 24 HOUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY lOAM TO 7PM FRIDAY tO AM TO RPM SATURDAYS lOAM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NtW JERSEY RESIDENTS ADD 0% SALtS TAX US HOBBY INC 200 MOONACHIE AVE NOONACHIE NJ 07074 US HOBBY INC November1998 115 4411 LI ThlI UIIiHiI 11111111 -J 1948 WINNER ROY CHESTERTON ENGLAND JAGUAR 4OARFPIPER CUB J-3/ARF 40SKY BABY-S/ ARF YEi.OW ALL WOOD CONAT SAkE25-35 20 TRAINERSAkE Wng Span 51 5 Length 35 Wng Span 48 Length 40Wing Span 67 Length 43 eight 3 3 ibs Weight 48 Inn 571h ight 79 lbs Itemo8S2...S9tWg Itemn865B #867...jS669t II trim suggested balancing model trailing edge wing setting both wing stab same positive angle right main wing panel washed leading edge up provide slight amount decalage Now would want Lift increases speed Keeping decalage low reduces speed sensitivity As model accelerates climb wing lifts more stab lift didnt increase about same rate model would loop keeping decalage low stab increases its lift about same rate wing model climbs balancing act between wing stab easy involved just decalage area stab expressed percentage wing area important stab airfoil thickness Some power models 1950s such Civy Boy Royono used stabs 50 percent wing area very rearward CU sometimes behind wing trailing edge minimum decalage everything worked would get good climb good glide something went wrong result often straight-up-and-straight-down flight Increasing decalage slightly allowed forward CU safer forgiving model combining right turn left roll component spiral climb could obtained lessened looping tendency gave improved transition climb glide Later development auto stab would allow model climb minimum decalage faster straighter climb end engine run stab trailing edge would move up few degrees increasing decalage better glide power models auto surfaces power phase must adjusted first find correct decalage setting doesnt result loop nose-over dive glide adjusted moving center gravity since has less effect model high speed low speed brings up another factor essence makes Free Flight possible Some adjustments effective high speeds others effective low speeds general flying surface movements effective high speeds Rudder offsets decalage wing tail warps will increase effectiveness speed increases Thrustline adjustments CC shifts stab tilt will effective slow speeds high example 100 downthrust used Ramrod necessary pull model over vertical normal 6070 degree climb path VTO Vertical Take Off launch used Once model got up speed downthrust less effect Another example balancing speed-sensitive adjustments use right thrust left rudder Rubber model tow speed thrust effective rudder causing right turn high speed rudder takes over straightening out climb result seemingly automatic control climb model starts turn too tightly right especially level slightly nose-down attitude models airspeed will increase rudder will become effective straightening out climb causing model nose up model climbs too steeply begins stall airspeed will drop off right thrust will become effective rudder will pull model right turn nose will drop slightly keeping model stalling type adjustment must balance thrust offset rudder offset can use lot both little both Since Free Flight models fly circles need allow turning flight traditional way to wash wing inside turn slightly maintain extensive inventory 3W spare parts Quality repair service provided 3W factory trained technician oducing new Front Intake 3W Engihes pular 3W-l20iB2 3W-l40iB2 now available Front Intake motors ZOiB2-F $ 135000 OiB2-F $ l55a00 3W Engine among 4 Gants suit yotr particular needs r pefeerces t Scale Available July 1998 ning July 98 4OiB2$ Z295OQ3W-1551B4 4-CyIite%400 sfer ports 2 Spark Plugs pe Cylinder Stronger lighter tli Power 3W-l60B4 like TO C TOC Ss es G 202Wingspan 114 ches : d flown 1998TOC 41fgng Matt 202 features ated Fiberglass fuselage prebiilt winsSi stabs remowibte vefqr WuigtuI nd installed Ailerons elevator nd rudil Xt4y hinged LiridI er supo Firewall installed G 202Kit$ iSPOQ G 202with 3W I20iB2$ 3l&O G 202with 3W 4OiB2$3295OUhd$iping $ HaSdtlng Prisiibi h VAL INC Phone7327G1EO997Fax727t1485 116 Model Aviation rry Menz Propellers Bolly Carbon Fiber Propellers Call monthly specials wwwaircraftintlcom Remember washin means leading edge raised washout means leading edge twisted down relative rest wing Washing wing inside turn provides safety factor prevent spiral dives model begins spiral down washin will generate lift raising wing slowing spiral Washin allows model flown tighter turn would possible flat unwashed wings recent approach turning flight fly model very large glide circles allows more-efficient glide also allows model scan larger area looking lift models typically set up reverse wing washthe wing inside turn washed out slightly rather washed thought will cause model turn lift However type trim should never combined tight glide turn result will spiral dive can make model turn glide several ways rudder can deflected rudder can cambered lift desired direction stab can tilted relative wing Rudder adjustments mentioned earlier speed-sensitive Thats models use fine-thread screw adjusters control rudder movement Believe doesnt take much rudder movement show noticeable change flight especially during powered phase joke containing grain truth difference between power model crashing right crashing left turn 0-80 rudder screw much-less-sensitive way make model turn use stab tilt will cause model turn toward high side stab Since stab tilt effective low speed high can combined opposite rudder adjustment give desired flight pattern rudder controls power phase stab tilt controls glide thing remember using stab tilt shimming under front stab tilt will also affect incidence stab sure take consideration changing stab tilt Remember type adjustments model uses should considered beginning Wing washin washout well thrust adjustments should builtin Wings tails should keyed maintain alignment Adjusting model requires repeated flights making very slight adjustments get optimum trim during phases flight Try think through what effect adjustment will make adjustments time sure use plywood shims rather balsa can crush Always glue shims place much-more-detailed look adjusting Free Flight model read Frank Zaics Circular Airflow book written 1960s explores effects dihedral decalage other factors Free Flight model books should reread annual basis book available AMA Jaguar Ted Evans-designed Jaguar classic Wakefield winners just screams build Flown ex RAF Spitfire pilot Roy Chesterton model won Wakefield Cup first postwar championship held Cleveland 1948 model features diamond fuselage distinctive deep underbelly shoulder-mounted tapered wings span bit 44 inches length 35 inches prop freewheelinga typical feature British Rubber models era model used 14 strands /4-inch rubber 48 inches long motor wound 1120 turns giving 90-second motor run Roy s three-flight average 6 minutes 273 seconds Tom McCoy built replica new Wakefield International Cup Museum AMA headquarters Spearheaded Charles Dennis Rushing museum will chronicle history aeromodelings most-sought after trophy Toms model follows originals black-and-white color scheme includes authentic rudder decal Chestersons model club mber1998 119
Edition: Model Aviation - 1998/11
Page Numbers: 114, 115, 116, 119
FREE FLIGHT DURATION WT YOU MEAN theres no radio have ever tried explain Free Flight nonmodeler someone familiar Radio Control Control Line Im sure youve heard response its often followed question keep crashing Free Flight model simplest Hand-Launched Glider actually performing delicate balancing act flight Through years us fly Free Flight have learned often trial error make very small adjustments model make fly crashing also climb highest glide best have learned adjust models seek Out thermals avoid downdrafts Lets examine ways have learned adjust model successful flight Hopefully will help explain challenges Free Flight readers familiar type model provide good review rest us column will discussing adjustments locked-up model timer torque-actuated auto rudder auto stab other variable geometry Auto surface-equipped models although slightly difficult build rig allow climb glide phases flight adjusted separately much simpler proposition locked-up model physical characteristic sets Free Flight models apart other models full-scale aircraft dihedral bent-up wings typical Free Flight model help stabilize roll axis allow circling flight spiraling Circling flight helps minimize distance model travels importantly allows model center thermals Simply stated dihedral works increasing lift low wing during bank decreasing lift high wing tending bring model out bank amount dihedral must closely balanced rudder area Too big rudder can cause model spiral easily offset rudder overpowers corrective effect dihedral Too small rudder other hand can result Dutch rolla series alternating part rolls direction trend over time has reduce 114 Model Aviation McCoys Jaguar Ted Evans design version Roy Chestersons 1948 Wakefield Cup winner destined Wakefield section AMA museum Bo Robinsons Mulvihill rubber model uses careful balance Ray Combs Spacer typifies locked-up power model adjustments control flight Photos Gil Fireagle must climb glide same fixed adjustments rudder area much possible getting Dutch roll problems gives model somewhat wandering glide turn felt conducive finding thermals look some rubber models 1930s will show other extreme rudders big half stab Perhaps thought necessary handle torque rubber motor during ROG Rise Off Ground takeoff Dihedral coupled rudder area increase dihedral need increase rudder area Other factors model design especially wing location can influence dihedral effect example high-winged model will need less dihedral low-winged model Thats Peanut Scale Fike can get away no dihedral P-5 Mustang might need bit scale dihedral stability Now have dihedral take care roll lets examine pitch axis Pitch nose-up nose-down aspect flight Now getting something really does look like balance short heavy nose balances longer lighter tail call balance point CG center gravity typical model somewhere between 50% 100% wings mean chord measured leading edge necessarily same models root chord Three-views Chesterson model Gerry Ritzs history Wakefield cup published 1953 International Competition Handbook 100% CG popular trim power models 1950s 1960s before auto surfaces became popular Balancing model trailing edge wing allowed model fly minimum decalage Decalage difference between incidence wing incidence stab model wing set 30 stab 2o would have decalage five degrees model wing set 3 degrees stab set 2 degrees would have decalage degree model CC 100% decalage usually just degree George Fullers Dixielander power model Only Dm1 US Hobby Full Line Model Airplanes Helicopters Boats Cars PIPER CUB J3/ARC 25-36 ALL WOOD CONST SPikE Wing Span 54 Length 36 $6995 Weight 3 SIbs Item#857-N441r JAGUAR 40/ARF 40 51 SPORTS ALL TRIM PAINTED NO DECALS SME Wing Span 48 Length 40 Weight 48 lbs -57 lbs SKY BABY-L/ARF 25-35 2C TRAINER SAkE Wing Span 51 5 tength 36 Weight 3 3 lbs Items854 FIRE FLYARF 10-1520 GLOW INTHE DARK AFTER SUNSET SAkE Wing Span 40 Length 347 67 9 ght 22 lbs- 24 lbs Item #940 DEALERS AND DISTRIBUTORS INQUIRIES WELCOME LRDERLQNL 1400-249-0544 INFORMATION 1-201460-0544 24 HOUR FAX LINE 1-2014604770 WE ACCEPT VISA MASTER CARD & DISCOVER CARDS PRICES SUBJECT TO CHANGE WITHOUT NOTICE STORE HOURS MONDAY THRU THURSDAY lOAM TO 7PM FRIDAY tO AM TO RPM SATURDAYS lOAM TO 4PM PACKAGING AND SHIPPING FEE S5 50 NtW JERSEY RESIDENTS ADD 0% SALtS TAX US HOBBY INC 200 MOONACHIE AVE NOONACHIE NJ 07074 US HOBBY INC November1998 115 4411 LI ThlI UIIiHiI 11111111 -J 1948 WINNER ROY CHESTERTON ENGLAND JAGUAR 4OARFPIPER CUB J-3/ARF 40SKY BABY-S/ ARF YEi.OW ALL WOOD CONAT SAkE25-35 20 TRAINERSAkE Wng Span 51 5 Length 35 Wng Span 48 Length 40Wing Span 67 Length 43 eight 3 3 ibs Weight 48 Inn 571h ight 79 lbs Itemo8S2...S9tWg Itemn865B #867...jS669t II trim suggested balancing model trailing edge wing setting both wing stab same positive angle right main wing panel washed leading edge up provide slight amount decalage Now would want Lift increases speed Keeping decalage low reduces speed sensitivity As model accelerates climb wing lifts more stab lift didnt increase about same rate model would loop keeping decalage low stab increases its lift about same rate wing model climbs balancing act between wing stab easy involved just decalage area stab expressed percentage wing area important stab airfoil thickness Some power models 1950s such Civy Boy Royono used stabs 50 percent wing area very rearward CU sometimes behind wing trailing edge minimum decalage everything worked would get good climb good glide something went wrong result often straight-up-and-straight-down flight Increasing decalage slightly allowed forward CU safer forgiving model combining right turn left roll component spiral climb could obtained lessened looping tendency gave improved transition climb glide Later development auto stab would allow model climb minimum decalage faster straighter climb end engine run stab trailing edge would move up few degrees increasing decalage better glide power models auto surfaces power phase must adjusted first find correct decalage setting doesnt result loop nose-over dive glide adjusted moving center gravity since has less effect model high speed low speed brings up another factor essence makes Free Flight possible Some adjustments effective high speeds others effective low speeds general flying surface movements effective high speeds Rudder offsets decalage wing tail warps will increase effectiveness speed increases Thrustline adjustments CC shifts stab tilt will effective slow speeds high example 100 downthrust used Ramrod necessary pull model over vertical normal 6070 degree climb path VTO Vertical Take Off launch used Once model got up speed downthrust less effect Another example balancing speed-sensitive adjustments use right thrust left rudder Rubber model tow speed thrust effective rudder causing right turn high speed rudder takes over straightening out climb result seemingly automatic control climb model starts turn too tightly right especially level slightly nose-down attitude models airspeed will increase rudder will become effective straightening out climb causing model nose up model climbs too steeply begins stall airspeed will drop off right thrust will become effective rudder will pull model right turn nose will drop slightly keeping model stalling type adjustment must balance thrust offset rudder offset can use lot both little both Since Free Flight models fly circles need allow turning flight traditional way to wash wing inside turn slightly maintain extensive inventory 3W spare parts Quality repair service provided 3W factory trained technician oducing new Front Intake 3W Engihes pular 3W-l20iB2 3W-l40iB2 now available Front Intake motors ZOiB2-F $ 135000 OiB2-F $ l55a00 3W Engine among 4 Gants suit yotr particular needs r pefeerces t Scale Available July 1998 ning July 98 4OiB2$ Z295OQ3W-1551B4 4-CyIite%400 sfer ports 2 Spark Plugs pe Cylinder Stronger lighter tli Power 3W-l60B4 like TO C TOC Ss es G 202Wingspan 114 ches : d flown 1998TOC 41fgng Matt 202 features ated Fiberglass fuselage prebiilt winsSi stabs remowibte vefqr WuigtuI nd installed Ailerons elevator nd rudil Xt4y hinged LiridI er supo Firewall installed G 202Kit$ iSPOQ G 202with 3W I20iB2$ 3l&O G 202with 3W 4OiB2$3295OUhd$iping $ HaSdtlng Prisiibi h VAL INC Phone7327G1EO997Fax727t1485 116 Model Aviation rry Menz Propellers Bolly Carbon Fiber Propellers Call monthly specials wwwaircraftintlcom Remember washin means leading edge raised washout means leading edge twisted down relative rest wing Washing wing inside turn provides safety factor prevent spiral dives model begins spiral down washin will generate lift raising wing slowing spiral Washin allows model flown tighter turn would possible flat unwashed wings recent approach turning flight fly model very large glide circles allows more-efficient glide also allows model scan larger area looking lift models typically set up reverse wing washthe wing inside turn washed out slightly rather washed thought will cause model turn lift However type trim should never combined tight glide turn result will spiral dive can make model turn glide several ways rudder can deflected rudder can cambered lift desired direction stab can tilted relative wing Rudder adjustments mentioned earlier speed-sensitive Thats models use fine-thread screw adjusters control rudder movement Believe doesnt take much rudder movement show noticeable change flight especially during powered phase joke containing grain truth difference between power model crashing right crashing left turn 0-80 rudder screw much-less-sensitive way make model turn use stab tilt will cause model turn toward high side stab Since stab tilt effective low speed high can combined opposite rudder adjustment give desired flight pattern rudder controls power phase stab tilt controls glide thing remember using stab tilt shimming under front stab tilt will also affect incidence stab sure take consideration changing stab tilt Remember type adjustments model uses should considered beginning Wing washin washout well thrust adjustments should builtin Wings tails should keyed maintain alignment Adjusting model requires repeated flights making very slight adjustments get optimum trim during phases flight Try think through what effect adjustment will make adjustments time sure use plywood shims rather balsa can crush Always glue shims place much-more-detailed look adjusting Free Flight model read Frank Zaics Circular Airflow book written 1960s explores effects dihedral decalage other factors Free Flight model books should reread annual basis book available AMA Jaguar Ted Evans-designed Jaguar classic Wakefield winners just screams build Flown ex RAF Spitfire pilot Roy Chesterton model won Wakefield Cup first postwar championship held Cleveland 1948 model features diamond fuselage distinctive deep underbelly shoulder-mounted tapered wings span bit 44 inches length 35 inches prop freewheelinga typical feature British Rubber models era model used 14 strands /4-inch rubber 48 inches long motor wound 1120 turns giving 90-second motor run Roy s three-flight average 6 minutes 273 seconds Tom McCoy built replica new Wakefield International Cup Museum AMA headquarters Spearheaded Charles Dennis Rushing museum will chronicle history aeromodelings most-sought after trophy Toms model follows originals black-and-white color scheme includes authentic rudder decal Chestersons model club mber1998 119
