an H Scott tItOSWIROP THE MOST distinguishing feature aircraft its shape world aircraft realm shapes airplane con toured achieve certain desired fly ing qualities however compro mises must made unfortunately form giving good high-speed characteris tics will usually poor performer low speeds fine slow flying airplanes just wont go fast Slots flaps various leading edge devices commonly used alleviate problem spectacular solu tion dilemma optimum aerody namic form actually change air planes shape flight pivot wings hinge really achieves dramatic results example extending wings variable geometry airplane enables take off land short runways fly slowly remain airborne great distances Sweeping wings fully back other hand will permit highest speeds attained course interme diate wing positions may selected remarkable planes achieve what ever performance qualities may de sired accomplish mission controversial F- 111 successful areas except political first US combat machine utilize swing wings B-I bomber swing-wing aircraft intended replace elderly B-52s now service Abroad French Dassult Mirage G8 Soviet Mig 23 Flog ger Multinational MRCA provided variable geometry wings Thus least until another aerody namic breakthrough occurs will see ing more swing-wing con cept aircraft Swinger presented en joyable little Half-A control-line model tended convey some impressions both visual flight modern air craft its builder structure has designed nearly easily fabricated simplest sort trainer model exceptionally stable flight wing configuration Construction save wing-box area entirely conventional wing makes model substan tially different others will begin construction assembly wing panels cut very hard balsa formed gear-like teeth roots feature enables two movable wing panels maintain correct relationship regardless wing sweep angle select ed Note wing roots iden tical thus will possible stack up wing blanks saw out both wing panels same time After wings cut shape plane sand airfoil sections carefully airfoil simply streamlined curve top flat bottom form lifting section take care produce left- righthand panel will also necessary match gear teeth together careful sanding order prevent binding wings moved also help ful touch strengthen gear teeth thin coating epoxy glue spread over root area taking care glue allowed build up thickness part Finally give separate wing panels coat two clear fuel-proof dope sanding sealer set aside wing-box pieces next cut shape Before assembly inner faces upper lower box pieces should given coating fuel-proof dope sanded smooth wing-box pieces glued together incorporating stabilizer wing pivot holes drilled box assembly movable wing panels slid place secured hardwood dow el pivot pins pin locations reinforced sheet balsa fairings top bottom fuselage simple profile struc ture After cutting shape glue ply wood main landing gear doublers place dry secure main landing gear doublers sewing gear strong button-and-carpet thread thin wire through drilled holes desired blind mounting nuts should installed back firewall before firewall its supporting blocks epoxied position strong fabric patch glued across front firewall sides firewall reinforcing blocks will much strengthen assembly wing-box-stabilizer assembly securely glued top fuse lage music-wire line guide next bent shape may well find con venient heat about inch wire cherry-red allow cool order bend loop wire line guide installed underside wing-box using plenty glue cloth patch reinforcement elevators shaped joined 40 Model Aviation U-shaped music wire joiner Epoxy glue recommended oper ation Next using fabric thread hinges elevators hinged stabilizer elevator-horn installed fol lowed addition fin rud der glued place taking care offset right shown plan After good over smoothing sandpaper give model least two coats filler coat prepare color fuel-proof dope finish Take care during painting operations wings adhere wing-box stabilizer Following color dope add decals desired install bellcrank will notice screwed 1/16 diameter hole drilled under side left wing pivot-pin dowel installing bellcrank forget install push rod nose landing gear will held place against firewall installa tion Cox tank-mounted engine right wing pivot dowel provides mount ing wing sweep lock simple gadget prevents wings moving through action vibration ship flight yet provides easy ground adjustment wire spring holds pin place through lower wing-box skin series holes right wing panel change wing sweep angle lift locking pin out hole exert gentle force both wing pan els achieve desired wing position done return pin holes wing wing-box wing lock pin provided prevent unwanted wing motion have no doubt advanced modelers may devise mechanisms allow inten tional wing sweep change during flight Swinger thus completed check carefully correct balance Two center gravity positions shown plan due weight area shift movable wing panels model balances well two posi tions shown will also balance intermediate position Should Swing er prove nose heavy may useful attach small weights rear wing-tips order bring trim An unorthodox approach Swinger ordinary airplane recommend flying Swinger flying lines 008 diameter wire 35 ft length As model fitted leadouts flying lines themselves lead through loop line guide connected bellcrank After flight inspect wings alignment security suggested first flights made wings forward position succeeding flights progres sively bringing wings rearward way flying characteristics vari ous wing positions may investigated will find full-size aircraft sharply wings swept December 1977 41 Shown what would real plane forward low speed r mediate position cruise fully swept high-speed model stable modes since both CG aerodynamic center happily proper relationship times However model should balanced statically two G positions indicated plan extreme forward rearward wing locations Any ballasting done wing tips see text 6 EISFORCEMFNT NOTE FUEL PROOF WING ROOTS AND INNER SIJRFACEG OF WING HOE BEFORE ASSEMBLY IVOT FA FIREWALL I/4 SPINNERIDA BELLCRARB BALSA BLOCKAAfl FIREWALL REINFORCEMENT WIRG\ yPIVOT FAIRING EW WING BOG DETAIL OF WING POSITION LOCK ELEVATOR I/BSREET 2 STABILIZER El/N 2~ PUGUROD WING CAUTION GISENGAGE WING POSITION LOCK PIN BEFORE ATTEMPTING TO CHARGE WING SWEEP ANGLE LINE GUISE UTTACI TO WING ROE ONLY NOTE WHEN MODELS VALANCE IS ESTUBLISRCD AG GROWN BELOW THE CO WILL BC CORRECT FOR ALL INTERMEDIATE POSITIONS AU WELL CENTER OF GRAVITY WING EXTENSLIS H CU. WING FULLY SWEPT L 1 DIA MAIN WHEELS 540I 1 Fl 0 0 CD 5 0
Edition: Model Aviation - 1977/12
Page Numbers: 40, 41, 42
an H Scott tItOSWIROP THE MOST distinguishing feature aircraft its shape world aircraft realm shapes airplane con toured achieve certain desired fly ing qualities however compro mises must made unfortunately form giving good high-speed characteris tics will usually poor performer low speeds fine slow flying airplanes just wont go fast Slots flaps various leading edge devices commonly used alleviate problem spectacular solu tion dilemma optimum aerody namic form actually change air planes shape flight pivot wings hinge really achieves dramatic results example extending wings variable geometry airplane enables take off land short runways fly slowly remain airborne great distances Sweeping wings fully back other hand will permit highest speeds attained course interme diate wing positions may selected remarkable planes achieve what ever performance qualities may de sired accomplish mission controversial F- 111 successful areas except political first US combat machine utilize swing wings B-I bomber swing-wing aircraft intended replace elderly B-52s now service Abroad French Dassult Mirage G8 Soviet Mig 23 Flog ger Multinational MRCA provided variable geometry wings Thus least until another aerody namic breakthrough occurs will see ing more swing-wing con cept aircraft Swinger presented en joyable little Half-A control-line model tended convey some impressions both visual flight modern air craft its builder structure has designed nearly easily fabricated simplest sort trainer model exceptionally stable flight wing configuration Construction save wing-box area entirely conventional wing makes model substan tially different others will begin construction assembly wing panels cut very hard balsa formed gear-like teeth roots feature enables two movable wing panels maintain correct relationship regardless wing sweep angle select ed Note wing roots iden tical thus will possible stack up wing blanks saw out both wing panels same time After wings cut shape plane sand airfoil sections carefully airfoil simply streamlined curve top flat bottom form lifting section take care produce left- righthand panel will also necessary match gear teeth together careful sanding order prevent binding wings moved also help ful touch strengthen gear teeth thin coating epoxy glue spread over root area taking care glue allowed build up thickness part Finally give separate wing panels coat two clear fuel-proof dope sanding sealer set aside wing-box pieces next cut shape Before assembly inner faces upper lower box pieces should given coating fuel-proof dope sanded smooth wing-box pieces glued together incorporating stabilizer wing pivot holes drilled box assembly movable wing panels slid place secured hardwood dow el pivot pins pin locations reinforced sheet balsa fairings top bottom fuselage simple profile struc ture After cutting shape glue ply wood main landing gear doublers place dry secure main landing gear doublers sewing gear strong button-and-carpet thread thin wire through drilled holes desired blind mounting nuts should installed back firewall before firewall its supporting blocks epoxied position strong fabric patch glued across front firewall sides firewall reinforcing blocks will much strengthen assembly wing-box-stabilizer assembly securely glued top fuse lage music-wire line guide next bent shape may well find con venient heat about inch wire cherry-red allow cool order bend loop wire line guide installed underside wing-box using plenty glue cloth patch reinforcement elevators shaped joined 40 Model Aviation U-shaped music wire joiner Epoxy glue recommended oper ation Next using fabric thread hinges elevators hinged stabilizer elevator-horn installed fol lowed addition fin rud der glued place taking care offset right shown plan After good over smoothing sandpaper give model least two coats filler coat prepare color fuel-proof dope finish Take care during painting operations wings adhere wing-box stabilizer Following color dope add decals desired install bellcrank will notice screwed 1/16 diameter hole drilled under side left wing pivot-pin dowel installing bellcrank forget install push rod nose landing gear will held place against firewall installa tion Cox tank-mounted engine right wing pivot dowel provides mount ing wing sweep lock simple gadget prevents wings moving through action vibration ship flight yet provides easy ground adjustment wire spring holds pin place through lower wing-box skin series holes right wing panel change wing sweep angle lift locking pin out hole exert gentle force both wing pan els achieve desired wing position done return pin holes wing wing-box wing lock pin provided prevent unwanted wing motion have no doubt advanced modelers may devise mechanisms allow inten tional wing sweep change during flight Swinger thus completed check carefully correct balance Two center gravity positions shown plan due weight area shift movable wing panels model balances well two posi tions shown will also balance intermediate position Should Swing er prove nose heavy may useful attach small weights rear wing-tips order bring trim An unorthodox approach Swinger ordinary airplane recommend flying Swinger flying lines 008 diameter wire 35 ft length As model fitted leadouts flying lines themselves lead through loop line guide connected bellcrank After flight inspect wings alignment security suggested first flights made wings forward position succeeding flights progres sively bringing wings rearward way flying characteristics vari ous wing positions may investigated will find full-size aircraft sharply wings swept December 1977 41 Shown what would real plane forward low speed r mediate position cruise fully swept high-speed model stable modes since both CG aerodynamic center happily proper relationship times However model should balanced statically two G positions indicated plan extreme forward rearward wing locations Any ballasting done wing tips see text 6 EISFORCEMFNT NOTE FUEL PROOF WING ROOTS AND INNER SIJRFACEG OF WING HOE BEFORE ASSEMBLY IVOT FA FIREWALL I/4 SPINNERIDA BELLCRARB BALSA BLOCKAAfl FIREWALL REINFORCEMENT WIRG\ yPIVOT FAIRING EW WING BOG DETAIL OF WING POSITION LOCK ELEVATOR I/BSREET 2 STABILIZER El/N 2~ PUGUROD WING CAUTION GISENGAGE WING POSITION LOCK PIN BEFORE ATTEMPTING TO CHARGE WING SWEEP ANGLE LINE GUISE UTTACI TO WING ROE ONLY NOTE WHEN MODELS VALANCE IS ESTUBLISRCD AG GROWN BELOW THE CO WILL BC CORRECT FOR ALL INTERMEDIATE POSITIONS AU WELL CENTER OF GRAVITY WING EXTENSLIS H CU. WING FULLY SWEPT L 1 DIA MAIN WHEELS 540I 1 Fl 0 0 CD 5 0
Edition: Model Aviation - 1977/12
Page Numbers: 40, 41, 42
an H Scott tItOSWIROP THE MOST distinguishing feature aircraft its shape world aircraft realm shapes airplane con toured achieve certain desired fly ing qualities however compro mises must made unfortunately form giving good high-speed characteris tics will usually poor performer low speeds fine slow flying airplanes just wont go fast Slots flaps various leading edge devices commonly used alleviate problem spectacular solu tion dilemma optimum aerody namic form actually change air planes shape flight pivot wings hinge really achieves dramatic results example extending wings variable geometry airplane enables take off land short runways fly slowly remain airborne great distances Sweeping wings fully back other hand will permit highest speeds attained course interme diate wing positions may selected remarkable planes achieve what ever performance qualities may de sired accomplish mission controversial F- 111 successful areas except political first US combat machine utilize swing wings B-I bomber swing-wing aircraft intended replace elderly B-52s now service Abroad French Dassult Mirage G8 Soviet Mig 23 Flog ger Multinational MRCA provided variable geometry wings Thus least until another aerody namic breakthrough occurs will see ing more swing-wing con cept aircraft Swinger presented en joyable little Half-A control-line model tended convey some impressions both visual flight modern air craft its builder structure has designed nearly easily fabricated simplest sort trainer model exceptionally stable flight wing configuration Construction save wing-box area entirely conventional wing makes model substan tially different others will begin construction assembly wing panels cut very hard balsa formed gear-like teeth roots feature enables two movable wing panels maintain correct relationship regardless wing sweep angle select ed Note wing roots iden tical thus will possible stack up wing blanks saw out both wing panels same time After wings cut shape plane sand airfoil sections carefully airfoil simply streamlined curve top flat bottom form lifting section take care produce left- righthand panel will also necessary match gear teeth together careful sanding order prevent binding wings moved also help ful touch strengthen gear teeth thin coating epoxy glue spread over root area taking care glue allowed build up thickness part Finally give separate wing panels coat two clear fuel-proof dope sanding sealer set aside wing-box pieces next cut shape Before assembly inner faces upper lower box pieces should given coating fuel-proof dope sanded smooth wing-box pieces glued together incorporating stabilizer wing pivot holes drilled box assembly movable wing panels slid place secured hardwood dow el pivot pins pin locations reinforced sheet balsa fairings top bottom fuselage simple profile struc ture After cutting shape glue ply wood main landing gear doublers place dry secure main landing gear doublers sewing gear strong button-and-carpet thread thin wire through drilled holes desired blind mounting nuts should installed back firewall before firewall its supporting blocks epoxied position strong fabric patch glued across front firewall sides firewall reinforcing blocks will much strengthen assembly wing-box-stabilizer assembly securely glued top fuse lage music-wire line guide next bent shape may well find con venient heat about inch wire cherry-red allow cool order bend loop wire line guide installed underside wing-box using plenty glue cloth patch reinforcement elevators shaped joined 40 Model Aviation U-shaped music wire joiner Epoxy glue recommended oper ation Next using fabric thread hinges elevators hinged stabilizer elevator-horn installed fol lowed addition fin rud der glued place taking care offset right shown plan After good over smoothing sandpaper give model least two coats filler coat prepare color fuel-proof dope finish Take care during painting operations wings adhere wing-box stabilizer Following color dope add decals desired install bellcrank will notice screwed 1/16 diameter hole drilled under side left wing pivot-pin dowel installing bellcrank forget install push rod nose landing gear will held place against firewall installa tion Cox tank-mounted engine right wing pivot dowel provides mount ing wing sweep lock simple gadget prevents wings moving through action vibration ship flight yet provides easy ground adjustment wire spring holds pin place through lower wing-box skin series holes right wing panel change wing sweep angle lift locking pin out hole exert gentle force both wing pan els achieve desired wing position done return pin holes wing wing-box wing lock pin provided prevent unwanted wing motion have no doubt advanced modelers may devise mechanisms allow inten tional wing sweep change during flight Swinger thus completed check carefully correct balance Two center gravity positions shown plan due weight area shift movable wing panels model balances well two posi tions shown will also balance intermediate position Should Swing er prove nose heavy may useful attach small weights rear wing-tips order bring trim An unorthodox approach Swinger ordinary airplane recommend flying Swinger flying lines 008 diameter wire 35 ft length As model fitted leadouts flying lines themselves lead through loop line guide connected bellcrank After flight inspect wings alignment security suggested first flights made wings forward position succeeding flights progres sively bringing wings rearward way flying characteristics vari ous wing positions may investigated will find full-size aircraft sharply wings swept December 1977 41 Shown what would real plane forward low speed r mediate position cruise fully swept high-speed model stable modes since both CG aerodynamic center happily proper relationship times However model should balanced statically two G positions indicated plan extreme forward rearward wing locations Any ballasting done wing tips see text 6 EISFORCEMFNT NOTE FUEL PROOF WING ROOTS AND INNER SIJRFACEG OF WING HOE BEFORE ASSEMBLY IVOT FA FIREWALL I/4 SPINNERIDA BELLCRARB BALSA BLOCKAAfl FIREWALL REINFORCEMENT WIRG\ yPIVOT FAIRING EW WING BOG DETAIL OF WING POSITION LOCK ELEVATOR I/BSREET 2 STABILIZER El/N 2~ PUGUROD WING CAUTION GISENGAGE WING POSITION LOCK PIN BEFORE ATTEMPTING TO CHARGE WING SWEEP ANGLE LINE GUISE UTTACI TO WING ROE ONLY NOTE WHEN MODELS VALANCE IS ESTUBLISRCD AG GROWN BELOW THE CO WILL BC CORRECT FOR ALL INTERMEDIATE POSITIONS AU WELL CENTER OF GRAVITY WING EXTENSLIS H CU. WING FULLY SWEPT L 1 DIA MAIN WHEELS 540I 1 Fl 0 0 CD 5 0