TWIGGY IS ultra-simple stickand-tissue model flies well de signed modeler trying first built-up construction experienced modeler wanting some sport flying fun minimum construction time ideally suited classes beginning modelers article mainly about conventional tractor model details canard version also included rec ommended tractor built first canard someone wishing some experimenting propeller-nose bearing unit rubber-powered models used rather difficult construction task Twiggy avoids difficulty utilizing plastic unit #600 North Pacific Star Flyer canard version drawing shows build up nose bearing prefers wing has no ribs yet has airfoil gives good lift may wonder Twiggy should built already has Star Flyer Twiggy much better performer because larger yet lighter Medium-grade balsa should used model Lightweight balsa often brit tle heavy balsa unnecessary Select straight piece X stick Note underside stick rear cut upsweep Measure cut carefully negative angle nec essary produce good stability upsweep begins four inches forward end stick removes except top 1/16 stick tail angle often called decalage though understand word supposed used angular difference between wings biplane Sometimes stabi lizer set parallel fuselage wing given positive angle rather set up used Note stick has double thickness under wing resist twisting forces wound rubber tightly wound rubber will twist thin stick turn will twist wing causing erratic flight So glue sec ond thickness wood stick wing location piece can tapered fore aft streamline stick joint wing tail frames white type glues recommended Ali phatic ones such Titebond excellent soak well very tough dont shrink upon drying Thus likely warp surfaces slower dry plastic types such Am broid Testors Duco worth extra bother Form rear hook steel piano wire glue lash stick land ing gear unit Star Flyer can also glued lashed stick shown could left off model flown fine flying ROG performs either canard tractor Clarence Mather Photos Fudo Takagi w July1976 47 Twiggy uses its nose bearing assembly plastic unit #600 North Pacific Star Fly er beat rubber S-in loop Filati 1/8 wide have trouble obtaining rubber just loop together several #33 rubber bands Bottom wild blue yonder G G Y TIP OUTLINES ARE BUILT SEPARATE FROM CENTER PANEL AND WITHOUT SPAR --TIPS ARE PROPPED UP TO 1 1/f DIHEDRAL AND GLUED TO THE CENTER SPAR IS THEN ADDED I1 I -- _ ENTIRE CENTER NOTE-WING HAS NO RIBS AIRFOIL IS CREATED BY TISSUE BENDING OVER SPAR LAP iTISSUE 1/8w AT DIHEDRAL JOINT TISSUE GRAIN 1 -TRACTOR MODEL STAB IS _ ON BOTH SIDES /16X1/8 SPAR ON CANARD ONLY - 1/16X 1/~ FRAME K FLAT AND COVERED -- 3/ X 13 MOTOR STICK STEEL WIRE AD BINDING U-- Ihill // I1~X / ~ / -Sf 12 EXPERIMENTAL CANARD II I PANEL IS FLAT Kl/6X VOTE-RIGHT SIDE THAN LEFT 1/8 SET ON EDGE IS LONGER DO NOT SHRINK TISSUE TIPS ARE RAISED 1 1/4 FOR DIHEDRAL ALL SURFACE OUTLINES ARE OF 1/16 X 1/8 MEDIUM BALSA . _______ MODEL FLIES ON THREE 33 RUBBER BANDS OR 10 LOOP OF I/8 FILATI 1 TIP DIHEDRAL OPTIONAL BALSANORTH 1w600 TISSUE COVERING FROMNORTH DOUBLERPACIFIC MAY BEUSED TRACTOR MODELOR BEND FROM 1/32 WIRE 0 NOTE HIGH STAB ANGLE _- - 11g BALSAKIiiIA4 _______SI __5-7 PLASTIC PROP I/I6AL TUBE VERSION GGY SIMPLIFIED SPORT MODEL CAatAvc SAN DIEGO ORBITEERS Twiggy band-launched after funre member take-offs fun wing tail surfaces assembled 1/16 X 1/8 strip balsa Three 3-foot lengths will enough Place plan piece insulation board such Cellotex soft wood Cover plan wax paper plastic ex cess glue will stick pieces wood held place placing pins along sides Remember use nonshrinking glues parts Coat edge joint glue allow soak wood pores minute two apply second coat join parts Try make joints fit well dont gaps can filled adding coats glue Allow glue dry between coats Note wing tips built separately center panel illustrated photo sequence tip spars put place until after tip outlines have joined center panel Allow frames remain pinned flat until glue thoroughly drysuch overnight edges tip frames need beveled make good fit center panel Prop ends tips up thread spool observe angle joint Sand cut away edges make tight fit possible Practice helps dont fit well fill up gap glue layers mentioned earlier Note bottom fin does need cross piece fin glued side stick original Twiggys covered Japanese tissue works well Any lightweight material could used Avoid tissue very porous will leak air decrease performance tissue attached leading trailing edges wing outline tail preparation covering paint edges two coats clear dope new covering begin stabilizer sharp scissors needed cut tissue sharp razor blade will also job straight edge guide blade Cut tissue bit larger frame lay place frame Paint thinner through tissue top dope thinner will soften under coats will adhere tissue Rubbing tissue onto wood enhances effect After few min utes excess tissue can cut sanded away frames stabilizer fin covered both sides tissue bottom fin left loose Repeat procedure underside wing beginning center panel top airfoil produced tissue bending over spar Cut tissue grain running crosswise top continued page 90 50 Model Aviation Left For want different try experimenting canard tail-first ver sion also good flier Just sure observe changes given plan photo directly above can see setting forward wing vertical tail Top The wing constructed three simple steps Assemble center section tip panels flat board Above Glue tips using blocks hold required di hedral angle Finally below add spars tips spars result kind lifting rib section wing covered COMPETITION PROVEN THIN RIGID BLADES OF HARD MAPLE WOOD SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCH 5%34 634 733y04 83%456 945677% 10467 106W 8W0 106EW 114677% 7% 7% 8 116EW 11%67 126 125W 1356 1456 1556 164%6 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALLTIMES RC PYLON RACING DIAPITCH 5h354 758 75N SN0 8%61577% 961577% CONTROL LINE REEDS RACING DIAPITCH 4%6% 4%55% 6788% 7715101511 88 89N 9%N 91213 0N NARROW 71 PecoSp 39 JW Wed Wn, $14 52 Woco C6 Cobb $16 19 60 Weddell-Wro 514 dO S [ OpI Tr 271 19 cjnc$6B$ld 4$ GL2TJA SpI Tc $12 566516 52 T Arc 2000 Spo $15 eRocer $16 49 P0 Mall,g PA-S $12 *yShp $14 62 lockheed Vego$22 ye Too 13 $12 54 Eoglerock AS$12 Ictioc Rcc $14 60 Cct6eWR Jr$12 per Soic $12 61 Cort Sobin 055 $12 ICi & 2512 65 Stondord J1 $16 Scrildog $14 77 Loecoerbe Sodoc $14 Rl22Ltk $12 Lock 514cr $15 25 Heath $obyEollel $9 45 Woco 10 SpI 055 $12 42 Fleet 2 SptTr$12 ICE$ INCL PATIRENS 65 $H TgetMolh $12 Add 10% 10 ALL CEDERS 22 Bc Jongroeleler $12 * SEND $1 Coroplele Pictorial Colalog* Ocer 90$ Piano• . 25010 $25 Twiggy/M ather continued page 50 wing will form better looking airfoil Allow tissue overlap I/ dihedral joint Attach tissue leading edges first pull fairly tight attach trailing edge tissue left free ends tips tissue Twiggy water shrunk doped Scrape sand tissue frames stick-frames joints will form will allow glue make stronger joints Attach wing first hold stabilizer place observe whether parallel wing glue place sand away new angle underside stick until parallel Go carefully small amount will need removed fin glued side stick Twiggy now ready fly best rubber loop Filati about /s wide eight inches long testing ever #33 rubber bands can looped gether td make motor works fine flown such motors times types rubber should lubri cated before using several com mercial lubricants can purchased Castor oil will no others available Rub rubber until moist over Models should tested near calm conditions over soft surface pos sible city park early morning Grass good shock absorber small models short motor will easy wind hand Three #33 rubber bands bit long hold rear part rubber front part taut As turn propeller allow rubber slip forward until slack gone Continue winding desired prop hook Star Flyers bit small rubber will climb up hook times Lube front part rubber again hold rubber extra taut winding reduce such problem first tests wind rubber 100 turns launch Twiggy level attitude directly breeze present should much Twiggy should move out little no climb right turn tendency long right wing causes parts assembled shown should no real trim prob lems balance off some clay front rear should solve problem Star Flyer props low pitch has property stalling easily model will climb quite steeply wound up So increase number winds continue flying long flights rub ber motor up twice long suggested testing can used Obtain geared winders before trying such motor thoughthey real chore wind finger free wheeling prop has large drag Twiggy will glide slowly relatively steep angle its sinking speed bad such simple model canard version has fine long climb pattern dont expect much glide forward prop used order keep simple does create nose down effect power runs out interesting model fly however large positive angle under front wing necessary produce stability spar added give airfoil good lift properties fin rear has strong turning effect mount carefully should straight stick possi bly slight angle right turn list mail order suppliers carry parts supplies rubber pow ered models Peck Polymers P 0 Box 2498 La Mesa Ca 92041 Frank Zaic Box 135 Northridge Ca 91326 Oldtimer Models 7454 Thurston Circle Milwaukee Wi 53218 FAI Supply 10802 N 33rd Ave Phoenix Ar 95029 Flying Near Airports Carefull Free Flight Radio Control Flying near airports situation might involve possibility modela being vicinity full-sCale aircraft operations must avoidedOr conducted eliminate dangerous situations 90 Model Aviation HIGH PERFORMANCE Super Drills New 6 1 2-in-long bits useful such modeling tasks drilling firewall holes pushrod holes other hard-to-reach places seven sizes used modeling offered 1/16 3/32 1/8 5/32 3/167/32 1/4-in Price 6-in $298 12-in$450 Glow Plug Tap & Drill Set drilling tapping model engines fit standard 1/4-32 glow plugs Price $298 set Glow Plug Die 1/4-32 adjustable die right size cleaning burrs glow-plug threads before use model engines Fits standard 5/8in die stock Price glow-plug die$498 die stock$249 Semco Model Engineering 14 Water St. Waltham Mass 02154 peducteeoiewproduCtreviewPredUeteeeiSWP reductre ViCW
Edition: Model Aviation - 1976/07
Page Numbers: 47, 48, 49, 50, 90
TWIGGY IS ultra-simple stickand-tissue model flies well de signed modeler trying first built-up construction experienced modeler wanting some sport flying fun minimum construction time ideally suited classes beginning modelers article mainly about conventional tractor model details canard version also included rec ommended tractor built first canard someone wishing some experimenting propeller-nose bearing unit rubber-powered models used rather difficult construction task Twiggy avoids difficulty utilizing plastic unit #600 North Pacific Star Flyer canard version drawing shows build up nose bearing prefers wing has no ribs yet has airfoil gives good lift may wonder Twiggy should built already has Star Flyer Twiggy much better performer because larger yet lighter Medium-grade balsa should used model Lightweight balsa often brit tle heavy balsa unnecessary Select straight piece X stick Note underside stick rear cut upsweep Measure cut carefully negative angle nec essary produce good stability upsweep begins four inches forward end stick removes except top 1/16 stick tail angle often called decalage though understand word supposed used angular difference between wings biplane Sometimes stabi lizer set parallel fuselage wing given positive angle rather set up used Note stick has double thickness under wing resist twisting forces wound rubber tightly wound rubber will twist thin stick turn will twist wing causing erratic flight So glue sec ond thickness wood stick wing location piece can tapered fore aft streamline stick joint wing tail frames white type glues recommended Ali phatic ones such Titebond excellent soak well very tough dont shrink upon drying Thus likely warp surfaces slower dry plastic types such Am broid Testors Duco worth extra bother Form rear hook steel piano wire glue lash stick land ing gear unit Star Flyer can also glued lashed stick shown could left off model flown fine flying ROG performs either canard tractor Clarence Mather Photos Fudo Takagi w July1976 47 Twiggy uses its nose bearing assembly plastic unit #600 North Pacific Star Fly er beat rubber S-in loop Filati 1/8 wide have trouble obtaining rubber just loop together several #33 rubber bands Bottom wild blue yonder G G Y TIP OUTLINES ARE BUILT SEPARATE FROM CENTER PANEL AND WITHOUT SPAR --TIPS ARE PROPPED UP TO 1 1/f DIHEDRAL AND GLUED TO THE CENTER SPAR IS THEN ADDED I1 I -- _ ENTIRE CENTER NOTE-WING HAS NO RIBS AIRFOIL IS CREATED BY TISSUE BENDING OVER SPAR LAP iTISSUE 1/8w AT DIHEDRAL JOINT TISSUE GRAIN 1 -TRACTOR MODEL STAB IS _ ON BOTH SIDES /16X1/8 SPAR ON CANARD ONLY - 1/16X 1/~ FRAME K FLAT AND COVERED -- 3/ X 13 MOTOR STICK STEEL WIRE AD BINDING U-- Ihill // I1~X / ~ / -Sf 12 EXPERIMENTAL CANARD II I PANEL IS FLAT Kl/6X VOTE-RIGHT SIDE THAN LEFT 1/8 SET ON EDGE IS LONGER DO NOT SHRINK TISSUE TIPS ARE RAISED 1 1/4 FOR DIHEDRAL ALL SURFACE OUTLINES ARE OF 1/16 X 1/8 MEDIUM BALSA . _______ MODEL FLIES ON THREE 33 RUBBER BANDS OR 10 LOOP OF I/8 FILATI 1 TIP DIHEDRAL OPTIONAL BALSANORTH 1w600 TISSUE COVERING FROMNORTH DOUBLERPACIFIC MAY BEUSED TRACTOR MODELOR BEND FROM 1/32 WIRE 0 NOTE HIGH STAB ANGLE _- - 11g BALSAKIiiIA4 _______SI __5-7 PLASTIC PROP I/I6AL TUBE VERSION GGY SIMPLIFIED SPORT MODEL CAatAvc SAN DIEGO ORBITEERS Twiggy band-launched after funre member take-offs fun wing tail surfaces assembled 1/16 X 1/8 strip balsa Three 3-foot lengths will enough Place plan piece insulation board such Cellotex soft wood Cover plan wax paper plastic ex cess glue will stick pieces wood held place placing pins along sides Remember use nonshrinking glues parts Coat edge joint glue allow soak wood pores minute two apply second coat join parts Try make joints fit well dont gaps can filled adding coats glue Allow glue dry between coats Note wing tips built separately center panel illustrated photo sequence tip spars put place until after tip outlines have joined center panel Allow frames remain pinned flat until glue thoroughly drysuch overnight edges tip frames need beveled make good fit center panel Prop ends tips up thread spool observe angle joint Sand cut away edges make tight fit possible Practice helps dont fit well fill up gap glue layers mentioned earlier Note bottom fin does need cross piece fin glued side stick original Twiggys covered Japanese tissue works well Any lightweight material could used Avoid tissue very porous will leak air decrease performance tissue attached leading trailing edges wing outline tail preparation covering paint edges two coats clear dope new covering begin stabilizer sharp scissors needed cut tissue sharp razor blade will also job straight edge guide blade Cut tissue bit larger frame lay place frame Paint thinner through tissue top dope thinner will soften under coats will adhere tissue Rubbing tissue onto wood enhances effect After few min utes excess tissue can cut sanded away frames stabilizer fin covered both sides tissue bottom fin left loose Repeat procedure underside wing beginning center panel top airfoil produced tissue bending over spar Cut tissue grain running crosswise top continued page 90 50 Model Aviation Left For want different try experimenting canard tail-first ver sion also good flier Just sure observe changes given plan photo directly above can see setting forward wing vertical tail Top The wing constructed three simple steps Assemble center section tip panels flat board Above Glue tips using blocks hold required di hedral angle Finally below add spars tips spars result kind lifting rib section wing covered COMPETITION PROVEN THIN RIGID BLADES OF HARD MAPLE WOOD SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCH 5%34 634 733y04 83%456 945677% 10467 106W 8W0 106EW 114677% 7% 7% 8 116EW 11%67 126 125W 1356 1456 1556 164%6 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALLTIMES RC PYLON RACING DIAPITCH 5h354 758 75N SN0 8%61577% 961577% CONTROL LINE REEDS RACING DIAPITCH 4%6% 4%55% 6788% 7715101511 88 89N 9%N 91213 0N NARROW 71 PecoSp 39 JW Wed Wn, $14 52 Woco C6 Cobb $16 19 60 Weddell-Wro 514 dO S [ OpI Tr 271 19 cjnc$6B$ld 4$ GL2TJA SpI Tc $12 566516 52 T Arc 2000 Spo $15 eRocer $16 49 P0 Mall,g PA-S $12 *yShp $14 62 lockheed Vego$22 ye Too 13 $12 54 Eoglerock AS$12 Ictioc Rcc $14 60 Cct6eWR Jr$12 per Soic $12 61 Cort Sobin 055 $12 ICi & 2512 65 Stondord J1 $16 Scrildog $14 77 Loecoerbe Sodoc $14 Rl22Ltk $12 Lock 514cr $15 25 Heath $obyEollel $9 45 Woco 10 SpI 055 $12 42 Fleet 2 SptTr$12 ICE$ INCL PATIRENS 65 $H TgetMolh $12 Add 10% 10 ALL CEDERS 22 Bc Jongroeleler $12 * SEND $1 Coroplele Pictorial Colalog* Ocer 90$ Piano• . 25010 $25 Twiggy/M ather continued page 50 wing will form better looking airfoil Allow tissue overlap I/ dihedral joint Attach tissue leading edges first pull fairly tight attach trailing edge tissue left free ends tips tissue Twiggy water shrunk doped Scrape sand tissue frames stick-frames joints will form will allow glue make stronger joints Attach wing first hold stabilizer place observe whether parallel wing glue place sand away new angle underside stick until parallel Go carefully small amount will need removed fin glued side stick Twiggy now ready fly best rubber loop Filati about /s wide eight inches long testing ever #33 rubber bands can looped gether td make motor works fine flown such motors times types rubber should lubri cated before using several com mercial lubricants can purchased Castor oil will no others available Rub rubber until moist over Models should tested near calm conditions over soft surface pos sible city park early morning Grass good shock absorber small models short motor will easy wind hand Three #33 rubber bands bit long hold rear part rubber front part taut As turn propeller allow rubber slip forward until slack gone Continue winding desired prop hook Star Flyers bit small rubber will climb up hook times Lube front part rubber again hold rubber extra taut winding reduce such problem first tests wind rubber 100 turns launch Twiggy level attitude directly breeze present should much Twiggy should move out little no climb right turn tendency long right wing causes parts assembled shown should no real trim prob lems balance off some clay front rear should solve problem Star Flyer props low pitch has property stalling easily model will climb quite steeply wound up So increase number winds continue flying long flights rub ber motor up twice long suggested testing can used Obtain geared winders before trying such motor thoughthey real chore wind finger free wheeling prop has large drag Twiggy will glide slowly relatively steep angle its sinking speed bad such simple model canard version has fine long climb pattern dont expect much glide forward prop used order keep simple does create nose down effect power runs out interesting model fly however large positive angle under front wing necessary produce stability spar added give airfoil good lift properties fin rear has strong turning effect mount carefully should straight stick possi bly slight angle right turn list mail order suppliers carry parts supplies rubber pow ered models Peck Polymers P 0 Box 2498 La Mesa Ca 92041 Frank Zaic Box 135 Northridge Ca 91326 Oldtimer Models 7454 Thurston Circle Milwaukee Wi 53218 FAI Supply 10802 N 33rd Ave Phoenix Ar 95029 Flying Near Airports Carefull Free Flight Radio Control Flying near airports situation might involve possibility modela being vicinity full-sCale aircraft operations must avoidedOr conducted eliminate dangerous situations 90 Model Aviation HIGH PERFORMANCE Super Drills New 6 1 2-in-long bits useful such modeling tasks drilling firewall holes pushrod holes other hard-to-reach places seven sizes used modeling offered 1/16 3/32 1/8 5/32 3/167/32 1/4-in Price 6-in $298 12-in$450 Glow Plug Tap & Drill Set drilling tapping model engines fit standard 1/4-32 glow plugs Price $298 set Glow Plug Die 1/4-32 adjustable die right size cleaning burrs glow-plug threads before use model engines Fits standard 5/8in die stock Price glow-plug die$498 die stock$249 Semco Model Engineering 14 Water St. Waltham Mass 02154 peducteeoiewproduCtreviewPredUeteeeiSWP reductre ViCW
Edition: Model Aviation - 1976/07
Page Numbers: 47, 48, 49, 50, 90
TWIGGY IS ultra-simple stickand-tissue model flies well de signed modeler trying first built-up construction experienced modeler wanting some sport flying fun minimum construction time ideally suited classes beginning modelers article mainly about conventional tractor model details canard version also included rec ommended tractor built first canard someone wishing some experimenting propeller-nose bearing unit rubber-powered models used rather difficult construction task Twiggy avoids difficulty utilizing plastic unit #600 North Pacific Star Flyer canard version drawing shows build up nose bearing prefers wing has no ribs yet has airfoil gives good lift may wonder Twiggy should built already has Star Flyer Twiggy much better performer because larger yet lighter Medium-grade balsa should used model Lightweight balsa often brit tle heavy balsa unnecessary Select straight piece X stick Note underside stick rear cut upsweep Measure cut carefully negative angle nec essary produce good stability upsweep begins four inches forward end stick removes except top 1/16 stick tail angle often called decalage though understand word supposed used angular difference between wings biplane Sometimes stabi lizer set parallel fuselage wing given positive angle rather set up used Note stick has double thickness under wing resist twisting forces wound rubber tightly wound rubber will twist thin stick turn will twist wing causing erratic flight So glue sec ond thickness wood stick wing location piece can tapered fore aft streamline stick joint wing tail frames white type glues recommended Ali phatic ones such Titebond excellent soak well very tough dont shrink upon drying Thus likely warp surfaces slower dry plastic types such Am broid Testors Duco worth extra bother Form rear hook steel piano wire glue lash stick land ing gear unit Star Flyer can also glued lashed stick shown could left off model flown fine flying ROG performs either canard tractor Clarence Mather Photos Fudo Takagi w July1976 47 Twiggy uses its nose bearing assembly plastic unit #600 North Pacific Star Fly er beat rubber S-in loop Filati 1/8 wide have trouble obtaining rubber just loop together several #33 rubber bands Bottom wild blue yonder G G Y TIP OUTLINES ARE BUILT SEPARATE FROM CENTER PANEL AND WITHOUT SPAR --TIPS ARE PROPPED UP TO 1 1/f DIHEDRAL AND GLUED TO THE CENTER SPAR IS THEN ADDED I1 I -- _ ENTIRE CENTER NOTE-WING HAS NO RIBS AIRFOIL IS CREATED BY TISSUE BENDING OVER SPAR LAP iTISSUE 1/8w AT DIHEDRAL JOINT TISSUE GRAIN 1 -TRACTOR MODEL STAB IS _ ON BOTH SIDES /16X1/8 SPAR ON CANARD ONLY - 1/16X 1/~ FRAME K FLAT AND COVERED -- 3/ X 13 MOTOR STICK STEEL WIRE AD BINDING U-- Ihill // I1~X / ~ / -Sf 12 EXPERIMENTAL CANARD II I PANEL IS FLAT Kl/6X VOTE-RIGHT SIDE THAN LEFT 1/8 SET ON EDGE IS LONGER DO NOT SHRINK TISSUE TIPS ARE RAISED 1 1/4 FOR DIHEDRAL ALL SURFACE OUTLINES ARE OF 1/16 X 1/8 MEDIUM BALSA . _______ MODEL FLIES ON THREE 33 RUBBER BANDS OR 10 LOOP OF I/8 FILATI 1 TIP DIHEDRAL OPTIONAL BALSANORTH 1w600 TISSUE COVERING FROMNORTH DOUBLERPACIFIC MAY BEUSED TRACTOR MODELOR BEND FROM 1/32 WIRE 0 NOTE HIGH STAB ANGLE _- - 11g BALSAKIiiIA4 _______SI __5-7 PLASTIC PROP I/I6AL TUBE VERSION GGY SIMPLIFIED SPORT MODEL CAatAvc SAN DIEGO ORBITEERS Twiggy band-launched after funre member take-offs fun wing tail surfaces assembled 1/16 X 1/8 strip balsa Three 3-foot lengths will enough Place plan piece insulation board such Cellotex soft wood Cover plan wax paper plastic ex cess glue will stick pieces wood held place placing pins along sides Remember use nonshrinking glues parts Coat edge joint glue allow soak wood pores minute two apply second coat join parts Try make joints fit well dont gaps can filled adding coats glue Allow glue dry between coats Note wing tips built separately center panel illustrated photo sequence tip spars put place until after tip outlines have joined center panel Allow frames remain pinned flat until glue thoroughly drysuch overnight edges tip frames need beveled make good fit center panel Prop ends tips up thread spool observe angle joint Sand cut away edges make tight fit possible Practice helps dont fit well fill up gap glue layers mentioned earlier Note bottom fin does need cross piece fin glued side stick original Twiggys covered Japanese tissue works well Any lightweight material could used Avoid tissue very porous will leak air decrease performance tissue attached leading trailing edges wing outline tail preparation covering paint edges two coats clear dope new covering begin stabilizer sharp scissors needed cut tissue sharp razor blade will also job straight edge guide blade Cut tissue bit larger frame lay place frame Paint thinner through tissue top dope thinner will soften under coats will adhere tissue Rubbing tissue onto wood enhances effect After few min utes excess tissue can cut sanded away frames stabilizer fin covered both sides tissue bottom fin left loose Repeat procedure underside wing beginning center panel top airfoil produced tissue bending over spar Cut tissue grain running crosswise top continued page 90 50 Model Aviation Left For want different try experimenting canard tail-first ver sion also good flier Just sure observe changes given plan photo directly above can see setting forward wing vertical tail Top The wing constructed three simple steps Assemble center section tip panels flat board Above Glue tips using blocks hold required di hedral angle Finally below add spars tips spars result kind lifting rib section wing covered COMPETITION PROVEN THIN RIGID BLADES OF HARD MAPLE WOOD SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCH 5%34 634 733y04 83%456 945677% 10467 106W 8W0 106EW 114677% 7% 7% 8 116EW 11%67 126 125W 1356 1456 1556 164%6 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALLTIMES RC PYLON RACING DIAPITCH 5h354 758 75N SN0 8%61577% 961577% CONTROL LINE REEDS RACING DIAPITCH 4%6% 4%55% 6788% 7715101511 88 89N 9%N 91213 0N NARROW 71 PecoSp 39 JW Wed Wn, $14 52 Woco C6 Cobb $16 19 60 Weddell-Wro 514 dO S [ OpI Tr 271 19 cjnc$6B$ld 4$ GL2TJA SpI Tc $12 566516 52 T Arc 2000 Spo $15 eRocer $16 49 P0 Mall,g PA-S $12 *yShp $14 62 lockheed Vego$22 ye Too 13 $12 54 Eoglerock AS$12 Ictioc Rcc $14 60 Cct6eWR Jr$12 per Soic $12 61 Cort Sobin 055 $12 ICi & 2512 65 Stondord J1 $16 Scrildog $14 77 Loecoerbe Sodoc $14 Rl22Ltk $12 Lock 514cr $15 25 Heath $obyEollel $9 45 Woco 10 SpI 055 $12 42 Fleet 2 SptTr$12 ICE$ INCL PATIRENS 65 $H TgetMolh $12 Add 10% 10 ALL CEDERS 22 Bc Jongroeleler $12 * SEND $1 Coroplele Pictorial Colalog* Ocer 90$ Piano• . 25010 $25 Twiggy/M ather continued page 50 wing will form better looking airfoil Allow tissue overlap I/ dihedral joint Attach tissue leading edges first pull fairly tight attach trailing edge tissue left free ends tips tissue Twiggy water shrunk doped Scrape sand tissue frames stick-frames joints will form will allow glue make stronger joints Attach wing first hold stabilizer place observe whether parallel wing glue place sand away new angle underside stick until parallel Go carefully small amount will need removed fin glued side stick Twiggy now ready fly best rubber loop Filati about /s wide eight inches long testing ever #33 rubber bands can looped gether td make motor works fine flown such motors times types rubber should lubri cated before using several com mercial lubricants can purchased Castor oil will no others available Rub rubber until moist over Models should tested near calm conditions over soft surface pos sible city park early morning Grass good shock absorber small models short motor will easy wind hand Three #33 rubber bands bit long hold rear part rubber front part taut As turn propeller allow rubber slip forward until slack gone Continue winding desired prop hook Star Flyers bit small rubber will climb up hook times Lube front part rubber again hold rubber extra taut winding reduce such problem first tests wind rubber 100 turns launch Twiggy level attitude directly breeze present should much Twiggy should move out little no climb right turn tendency long right wing causes parts assembled shown should no real trim prob lems balance off some clay front rear should solve problem Star Flyer props low pitch has property stalling easily model will climb quite steeply wound up So increase number winds continue flying long flights rub ber motor up twice long suggested testing can used Obtain geared winders before trying such motor thoughthey real chore wind finger free wheeling prop has large drag Twiggy will glide slowly relatively steep angle its sinking speed bad such simple model canard version has fine long climb pattern dont expect much glide forward prop used order keep simple does create nose down effect power runs out interesting model fly however large positive angle under front wing necessary produce stability spar added give airfoil good lift properties fin rear has strong turning effect mount carefully should straight stick possi bly slight angle right turn list mail order suppliers carry parts supplies rubber pow ered models Peck Polymers P 0 Box 2498 La Mesa Ca 92041 Frank Zaic Box 135 Northridge Ca 91326 Oldtimer Models 7454 Thurston Circle Milwaukee Wi 53218 FAI Supply 10802 N 33rd Ave Phoenix Ar 95029 Flying Near Airports Carefull Free Flight Radio Control Flying near airports situation might involve possibility modela being vicinity full-sCale aircraft operations must avoidedOr conducted eliminate dangerous situations 90 Model Aviation HIGH PERFORMANCE Super Drills New 6 1 2-in-long bits useful such modeling tasks drilling firewall holes pushrod holes other hard-to-reach places seven sizes used modeling offered 1/16 3/32 1/8 5/32 3/167/32 1/4-in Price 6-in $298 12-in$450 Glow Plug Tap & Drill Set drilling tapping model engines fit standard 1/4-32 glow plugs Price $298 set Glow Plug Die 1/4-32 adjustable die right size cleaning burrs glow-plug threads before use model engines Fits standard 5/8in die stock Price glow-plug die$498 die stock$249 Semco Model Engineering 14 Water St. Waltham Mass 02154 peducteeoiewproduCtreviewPredUeteeeiSWP reductre ViCW
Edition: Model Aviation - 1976/07
Page Numbers: 47, 48, 49, 50, 90
TWIGGY IS ultra-simple stickand-tissue model flies well de signed modeler trying first built-up construction experienced modeler wanting some sport flying fun minimum construction time ideally suited classes beginning modelers article mainly about conventional tractor model details canard version also included rec ommended tractor built first canard someone wishing some experimenting propeller-nose bearing unit rubber-powered models used rather difficult construction task Twiggy avoids difficulty utilizing plastic unit #600 North Pacific Star Flyer canard version drawing shows build up nose bearing prefers wing has no ribs yet has airfoil gives good lift may wonder Twiggy should built already has Star Flyer Twiggy much better performer because larger yet lighter Medium-grade balsa should used model Lightweight balsa often brit tle heavy balsa unnecessary Select straight piece X stick Note underside stick rear cut upsweep Measure cut carefully negative angle nec essary produce good stability upsweep begins four inches forward end stick removes except top 1/16 stick tail angle often called decalage though understand word supposed used angular difference between wings biplane Sometimes stabi lizer set parallel fuselage wing given positive angle rather set up used Note stick has double thickness under wing resist twisting forces wound rubber tightly wound rubber will twist thin stick turn will twist wing causing erratic flight So glue sec ond thickness wood stick wing location piece can tapered fore aft streamline stick joint wing tail frames white type glues recommended Ali phatic ones such Titebond excellent soak well very tough dont shrink upon drying Thus likely warp surfaces slower dry plastic types such Am broid Testors Duco worth extra bother Form rear hook steel piano wire glue lash stick land ing gear unit Star Flyer can also glued lashed stick shown could left off model flown fine flying ROG performs either canard tractor Clarence Mather Photos Fudo Takagi w July1976 47 Twiggy uses its nose bearing assembly plastic unit #600 North Pacific Star Fly er beat rubber S-in loop Filati 1/8 wide have trouble obtaining rubber just loop together several #33 rubber bands Bottom wild blue yonder G G Y TIP OUTLINES ARE BUILT SEPARATE FROM CENTER PANEL AND WITHOUT SPAR --TIPS ARE PROPPED UP TO 1 1/f DIHEDRAL AND GLUED TO THE CENTER SPAR IS THEN ADDED I1 I -- _ ENTIRE CENTER NOTE-WING HAS NO RIBS AIRFOIL IS CREATED BY TISSUE BENDING OVER SPAR LAP iTISSUE 1/8w AT DIHEDRAL JOINT TISSUE GRAIN 1 -TRACTOR MODEL STAB IS _ ON BOTH SIDES /16X1/8 SPAR ON CANARD ONLY - 1/16X 1/~ FRAME K FLAT AND COVERED -- 3/ X 13 MOTOR STICK STEEL WIRE AD BINDING U-- Ihill // I1~X / ~ / -Sf 12 EXPERIMENTAL CANARD II I PANEL IS FLAT Kl/6X VOTE-RIGHT SIDE THAN LEFT 1/8 SET ON EDGE IS LONGER DO NOT SHRINK TISSUE TIPS ARE RAISED 1 1/4 FOR DIHEDRAL ALL SURFACE OUTLINES ARE OF 1/16 X 1/8 MEDIUM BALSA . _______ MODEL FLIES ON THREE 33 RUBBER BANDS OR 10 LOOP OF I/8 FILATI 1 TIP DIHEDRAL OPTIONAL BALSANORTH 1w600 TISSUE COVERING FROMNORTH DOUBLERPACIFIC MAY BEUSED TRACTOR MODELOR BEND FROM 1/32 WIRE 0 NOTE HIGH STAB ANGLE _- - 11g BALSAKIiiIA4 _______SI __5-7 PLASTIC PROP I/I6AL TUBE VERSION GGY SIMPLIFIED SPORT MODEL CAatAvc SAN DIEGO ORBITEERS Twiggy band-launched after funre member take-offs fun wing tail surfaces assembled 1/16 X 1/8 strip balsa Three 3-foot lengths will enough Place plan piece insulation board such Cellotex soft wood Cover plan wax paper plastic ex cess glue will stick pieces wood held place placing pins along sides Remember use nonshrinking glues parts Coat edge joint glue allow soak wood pores minute two apply second coat join parts Try make joints fit well dont gaps can filled adding coats glue Allow glue dry between coats Note wing tips built separately center panel illustrated photo sequence tip spars put place until after tip outlines have joined center panel Allow frames remain pinned flat until glue thoroughly drysuch overnight edges tip frames need beveled make good fit center panel Prop ends tips up thread spool observe angle joint Sand cut away edges make tight fit possible Practice helps dont fit well fill up gap glue layers mentioned earlier Note bottom fin does need cross piece fin glued side stick original Twiggys covered Japanese tissue works well Any lightweight material could used Avoid tissue very porous will leak air decrease performance tissue attached leading trailing edges wing outline tail preparation covering paint edges two coats clear dope new covering begin stabilizer sharp scissors needed cut tissue sharp razor blade will also job straight edge guide blade Cut tissue bit larger frame lay place frame Paint thinner through tissue top dope thinner will soften under coats will adhere tissue Rubbing tissue onto wood enhances effect After few min utes excess tissue can cut sanded away frames stabilizer fin covered both sides tissue bottom fin left loose Repeat procedure underside wing beginning center panel top airfoil produced tissue bending over spar Cut tissue grain running crosswise top continued page 90 50 Model Aviation Left For want different try experimenting canard tail-first ver sion also good flier Just sure observe changes given plan photo directly above can see setting forward wing vertical tail Top The wing constructed three simple steps Assemble center section tip panels flat board Above Glue tips using blocks hold required di hedral angle Finally below add spars tips spars result kind lifting rib section wing covered COMPETITION PROVEN THIN RIGID BLADES OF HARD MAPLE WOOD SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCH 5%34 634 733y04 83%456 945677% 10467 106W 8W0 106EW 114677% 7% 7% 8 116EW 11%67 126 125W 1356 1456 1556 164%6 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALLTIMES RC PYLON RACING DIAPITCH 5h354 758 75N SN0 8%61577% 961577% CONTROL LINE REEDS RACING DIAPITCH 4%6% 4%55% 6788% 7715101511 88 89N 9%N 91213 0N NARROW 71 PecoSp 39 JW Wed Wn, $14 52 Woco C6 Cobb $16 19 60 Weddell-Wro 514 dO S [ OpI Tr 271 19 cjnc$6B$ld 4$ GL2TJA SpI Tc $12 566516 52 T Arc 2000 Spo $15 eRocer $16 49 P0 Mall,g PA-S $12 *yShp $14 62 lockheed Vego$22 ye Too 13 $12 54 Eoglerock AS$12 Ictioc Rcc $14 60 Cct6eWR Jr$12 per Soic $12 61 Cort Sobin 055 $12 ICi & 2512 65 Stondord J1 $16 Scrildog $14 77 Loecoerbe Sodoc $14 Rl22Ltk $12 Lock 514cr $15 25 Heath $obyEollel $9 45 Woco 10 SpI 055 $12 42 Fleet 2 SptTr$12 ICE$ INCL PATIRENS 65 $H TgetMolh $12 Add 10% 10 ALL CEDERS 22 Bc Jongroeleler $12 * SEND $1 Coroplele Pictorial Colalog* Ocer 90$ Piano• . 25010 $25 Twiggy/M ather continued page 50 wing will form better looking airfoil Allow tissue overlap I/ dihedral joint Attach tissue leading edges first pull fairly tight attach trailing edge tissue left free ends tips tissue Twiggy water shrunk doped Scrape sand tissue frames stick-frames joints will form will allow glue make stronger joints Attach wing first hold stabilizer place observe whether parallel wing glue place sand away new angle underside stick until parallel Go carefully small amount will need removed fin glued side stick Twiggy now ready fly best rubber loop Filati about /s wide eight inches long testing ever #33 rubber bands can looped gether td make motor works fine flown such motors times types rubber should lubri cated before using several com mercial lubricants can purchased Castor oil will no others available Rub rubber until moist over Models should tested near calm conditions over soft surface pos sible city park early morning Grass good shock absorber small models short motor will easy wind hand Three #33 rubber bands bit long hold rear part rubber front part taut As turn propeller allow rubber slip forward until slack gone Continue winding desired prop hook Star Flyers bit small rubber will climb up hook times Lube front part rubber again hold rubber extra taut winding reduce such problem first tests wind rubber 100 turns launch Twiggy level attitude directly breeze present should much Twiggy should move out little no climb right turn tendency long right wing causes parts assembled shown should no real trim prob lems balance off some clay front rear should solve problem Star Flyer props low pitch has property stalling easily model will climb quite steeply wound up So increase number winds continue flying long flights rub ber motor up twice long suggested testing can used Obtain geared winders before trying such motor thoughthey real chore wind finger free wheeling prop has large drag Twiggy will glide slowly relatively steep angle its sinking speed bad such simple model canard version has fine long climb pattern dont expect much glide forward prop used order keep simple does create nose down effect power runs out interesting model fly however large positive angle under front wing necessary produce stability spar added give airfoil good lift properties fin rear has strong turning effect mount carefully should straight stick possi bly slight angle right turn list mail order suppliers carry parts supplies rubber pow ered models Peck Polymers P 0 Box 2498 La Mesa Ca 92041 Frank Zaic Box 135 Northridge Ca 91326 Oldtimer Models 7454 Thurston Circle Milwaukee Wi 53218 FAI Supply 10802 N 33rd Ave Phoenix Ar 95029 Flying Near Airports Carefull Free Flight Radio Control Flying near airports situation might involve possibility modela being vicinity full-sCale aircraft operations must avoidedOr conducted eliminate dangerous situations 90 Model Aviation HIGH PERFORMANCE Super Drills New 6 1 2-in-long bits useful such modeling tasks drilling firewall holes pushrod holes other hard-to-reach places seven sizes used modeling offered 1/16 3/32 1/8 5/32 3/167/32 1/4-in Price 6-in $298 12-in$450 Glow Plug Tap & Drill Set drilling tapping model engines fit standard 1/4-32 glow plugs Price $298 set Glow Plug Die 1/4-32 adjustable die right size cleaning burrs glow-plug threads before use model engines Fits standard 5/8in die stock Price glow-plug die$498 die stock$249 Semco Model Engineering 14 Water St. Waltham Mass 02154 peducteeoiewproduCtreviewPredUeteeeiSWP reductre ViCW
Edition: Model Aviation - 1976/07
Page Numbers: 47, 48, 49, 50, 90
TWIGGY IS ultra-simple stickand-tissue model flies well de signed modeler trying first built-up construction experienced modeler wanting some sport flying fun minimum construction time ideally suited classes beginning modelers article mainly about conventional tractor model details canard version also included rec ommended tractor built first canard someone wishing some experimenting propeller-nose bearing unit rubber-powered models used rather difficult construction task Twiggy avoids difficulty utilizing plastic unit #600 North Pacific Star Flyer canard version drawing shows build up nose bearing prefers wing has no ribs yet has airfoil gives good lift may wonder Twiggy should built already has Star Flyer Twiggy much better performer because larger yet lighter Medium-grade balsa should used model Lightweight balsa often brit tle heavy balsa unnecessary Select straight piece X stick Note underside stick rear cut upsweep Measure cut carefully negative angle nec essary produce good stability upsweep begins four inches forward end stick removes except top 1/16 stick tail angle often called decalage though understand word supposed used angular difference between wings biplane Sometimes stabi lizer set parallel fuselage wing given positive angle rather set up used Note stick has double thickness under wing resist twisting forces wound rubber tightly wound rubber will twist thin stick turn will twist wing causing erratic flight So glue sec ond thickness wood stick wing location piece can tapered fore aft streamline stick joint wing tail frames white type glues recommended Ali phatic ones such Titebond excellent soak well very tough dont shrink upon drying Thus likely warp surfaces slower dry plastic types such Am broid Testors Duco worth extra bother Form rear hook steel piano wire glue lash stick land ing gear unit Star Flyer can also glued lashed stick shown could left off model flown fine flying ROG performs either canard tractor Clarence Mather Photos Fudo Takagi w July1976 47 Twiggy uses its nose bearing assembly plastic unit #600 North Pacific Star Fly er beat rubber S-in loop Filati 1/8 wide have trouble obtaining rubber just loop together several #33 rubber bands Bottom wild blue yonder G G Y TIP OUTLINES ARE BUILT SEPARATE FROM CENTER PANEL AND WITHOUT SPAR --TIPS ARE PROPPED UP TO 1 1/f DIHEDRAL AND GLUED TO THE CENTER SPAR IS THEN ADDED I1 I -- _ ENTIRE CENTER NOTE-WING HAS NO RIBS AIRFOIL IS CREATED BY TISSUE BENDING OVER SPAR LAP iTISSUE 1/8w AT DIHEDRAL JOINT TISSUE GRAIN 1 -TRACTOR MODEL STAB IS _ ON BOTH SIDES /16X1/8 SPAR ON CANARD ONLY - 1/16X 1/~ FRAME K FLAT AND COVERED -- 3/ X 13 MOTOR STICK STEEL WIRE AD BINDING U-- Ihill // I1~X / ~ / -Sf 12 EXPERIMENTAL CANARD II I PANEL IS FLAT Kl/6X VOTE-RIGHT SIDE THAN LEFT 1/8 SET ON EDGE IS LONGER DO NOT SHRINK TISSUE TIPS ARE RAISED 1 1/4 FOR DIHEDRAL ALL SURFACE OUTLINES ARE OF 1/16 X 1/8 MEDIUM BALSA . _______ MODEL FLIES ON THREE 33 RUBBER BANDS OR 10 LOOP OF I/8 FILATI 1 TIP DIHEDRAL OPTIONAL BALSANORTH 1w600 TISSUE COVERING FROMNORTH DOUBLERPACIFIC MAY BEUSED TRACTOR MODELOR BEND FROM 1/32 WIRE 0 NOTE HIGH STAB ANGLE _- - 11g BALSAKIiiIA4 _______SI __5-7 PLASTIC PROP I/I6AL TUBE VERSION GGY SIMPLIFIED SPORT MODEL CAatAvc SAN DIEGO ORBITEERS Twiggy band-launched after funre member take-offs fun wing tail surfaces assembled 1/16 X 1/8 strip balsa Three 3-foot lengths will enough Place plan piece insulation board such Cellotex soft wood Cover plan wax paper plastic ex cess glue will stick pieces wood held place placing pins along sides Remember use nonshrinking glues parts Coat edge joint glue allow soak wood pores minute two apply second coat join parts Try make joints fit well dont gaps can filled adding coats glue Allow glue dry between coats Note wing tips built separately center panel illustrated photo sequence tip spars put place until after tip outlines have joined center panel Allow frames remain pinned flat until glue thoroughly drysuch overnight edges tip frames need beveled make good fit center panel Prop ends tips up thread spool observe angle joint Sand cut away edges make tight fit possible Practice helps dont fit well fill up gap glue layers mentioned earlier Note bottom fin does need cross piece fin glued side stick original Twiggys covered Japanese tissue works well Any lightweight material could used Avoid tissue very porous will leak air decrease performance tissue attached leading trailing edges wing outline tail preparation covering paint edges two coats clear dope new covering begin stabilizer sharp scissors needed cut tissue sharp razor blade will also job straight edge guide blade Cut tissue bit larger frame lay place frame Paint thinner through tissue top dope thinner will soften under coats will adhere tissue Rubbing tissue onto wood enhances effect After few min utes excess tissue can cut sanded away frames stabilizer fin covered both sides tissue bottom fin left loose Repeat procedure underside wing beginning center panel top airfoil produced tissue bending over spar Cut tissue grain running crosswise top continued page 90 50 Model Aviation Left For want different try experimenting canard tail-first ver sion also good flier Just sure observe changes given plan photo directly above can see setting forward wing vertical tail Top The wing constructed three simple steps Assemble center section tip panels flat board Above Glue tips using blocks hold required di hedral angle Finally below add spars tips spars result kind lifting rib section wing covered COMPETITION PROVEN THIN RIGID BLADES OF HARD MAPLE WOOD SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCH 5%34 634 733y04 83%456 945677% 10467 106W 8W0 106EW 114677% 7% 7% 8 116EW 11%67 126 125W 1356 1456 1556 164%6 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALLTIMES RC PYLON RACING DIAPITCH 5h354 758 75N SN0 8%61577% 961577% CONTROL LINE REEDS RACING DIAPITCH 4%6% 4%55% 6788% 7715101511 88 89N 9%N 91213 0N NARROW 71 PecoSp 39 JW Wed Wn, $14 52 Woco C6 Cobb $16 19 60 Weddell-Wro 514 dO S [ OpI Tr 271 19 cjnc$6B$ld 4$ GL2TJA SpI Tc $12 566516 52 T Arc 2000 Spo $15 eRocer $16 49 P0 Mall,g PA-S $12 *yShp $14 62 lockheed Vego$22 ye Too 13 $12 54 Eoglerock AS$12 Ictioc Rcc $14 60 Cct6eWR Jr$12 per Soic $12 61 Cort Sobin 055 $12 ICi & 2512 65 Stondord J1 $16 Scrildog $14 77 Loecoerbe Sodoc $14 Rl22Ltk $12 Lock 514cr $15 25 Heath $obyEollel $9 45 Woco 10 SpI 055 $12 42 Fleet 2 SptTr$12 ICE$ INCL PATIRENS 65 $H TgetMolh $12 Add 10% 10 ALL CEDERS 22 Bc Jongroeleler $12 * SEND $1 Coroplele Pictorial Colalog* Ocer 90$ Piano• . 25010 $25 Twiggy/M ather continued page 50 wing will form better looking airfoil Allow tissue overlap I/ dihedral joint Attach tissue leading edges first pull fairly tight attach trailing edge tissue left free ends tips tissue Twiggy water shrunk doped Scrape sand tissue frames stick-frames joints will form will allow glue make stronger joints Attach wing first hold stabilizer place observe whether parallel wing glue place sand away new angle underside stick until parallel Go carefully small amount will need removed fin glued side stick Twiggy now ready fly best rubber loop Filati about /s wide eight inches long testing ever #33 rubber bands can looped gether td make motor works fine flown such motors times types rubber should lubri cated before using several com mercial lubricants can purchased Castor oil will no others available Rub rubber until moist over Models should tested near calm conditions over soft surface pos sible city park early morning Grass good shock absorber small models short motor will easy wind hand Three #33 rubber bands bit long hold rear part rubber front part taut As turn propeller allow rubber slip forward until slack gone Continue winding desired prop hook Star Flyers bit small rubber will climb up hook times Lube front part rubber again hold rubber extra taut winding reduce such problem first tests wind rubber 100 turns launch Twiggy level attitude directly breeze present should much Twiggy should move out little no climb right turn tendency long right wing causes parts assembled shown should no real trim prob lems balance off some clay front rear should solve problem Star Flyer props low pitch has property stalling easily model will climb quite steeply wound up So increase number winds continue flying long flights rub ber motor up twice long suggested testing can used Obtain geared winders before trying such motor thoughthey real chore wind finger free wheeling prop has large drag Twiggy will glide slowly relatively steep angle its sinking speed bad such simple model canard version has fine long climb pattern dont expect much glide forward prop used order keep simple does create nose down effect power runs out interesting model fly however large positive angle under front wing necessary produce stability spar added give airfoil good lift properties fin rear has strong turning effect mount carefully should straight stick possi bly slight angle right turn list mail order suppliers carry parts supplies rubber pow ered models Peck Polymers P 0 Box 2498 La Mesa Ca 92041 Frank Zaic Box 135 Northridge Ca 91326 Oldtimer Models 7454 Thurston Circle Milwaukee Wi 53218 FAI Supply 10802 N 33rd Ave Phoenix Ar 95029 Flying Near Airports Carefull Free Flight Radio Control Flying near airports situation might involve possibility modela being vicinity full-sCale aircraft operations must avoidedOr conducted eliminate dangerous situations 90 Model Aviation HIGH PERFORMANCE Super Drills New 6 1 2-in-long bits useful such modeling tasks drilling firewall holes pushrod holes other hard-to-reach places seven sizes used modeling offered 1/16 3/32 1/8 5/32 3/167/32 1/4-in Price 6-in $298 12-in$450 Glow Plug Tap & Drill Set drilling tapping model engines fit standard 1/4-32 glow plugs Price $298 set Glow Plug Die 1/4-32 adjustable die right size cleaning burrs glow-plug threads before use model engines Fits standard 5/8in die stock Price glow-plug die$498 die stock$249 Semco Model Engineering 14 Water St. Waltham Mass 02154 peducteeoiewproduCtreviewPredUeteeeiSWP reductre ViCW