OihSI SSo/ SZ5 9y35 /9~ Znflt tAO AAA N PCq Akd 5R0ATEASO "Ps- kS .A/5'n.E.Cfl .MC AAA bZntn AC -C-CA t S5/C-C -C4/ CA-CAt A-CC ACAA -C --CS-C-Cay 58 Model Aviation O J P Van Leuven THE WALTZING MATILDA Wakefield tailpiane ARA-D prop airfoil featured way model trimmed fly will placed second 1979 Taft World 1979 NFFS International Symposium now describe Championships variant ofa typical Australian Report added up design could hold its model originally center gravity design longer tail moment dihedral own against best world due CG 65% changed 66% Wakefield FF design Down Under placed second 1979 World Champion ships carefully thought out ship relatively uncompli cated reasons its unique features field moving strapped-on weight improved glide obtained wing has differential tip washout whole left tip panel wing set minus 5 degrees relative center section gives 35mm washout left tip 25mm right feature made model handle motors torque during launch easier produced correctly balanced bank glide required Frank Zaics theory also enables model go lefthand glide immediately after prop folds stay thermal hopefully have launched tailplane dihedral contributes much A4, /c-S44ccc __ cf fiS-- __ _____ _____ II -iA/ AA,/kA S hAd 4 AkAAC4Ad4, jA, 6 ___A /I_I_A__I__1ILJ_LA_I_U7VI_____ II1 41K Li11___ILAs III I IIIKIki AAc WAcssfl A/Ak 96/ 55AAA /AskA2 AS/A i/As 003 5A4 550557/A0AA 100 Ac *0004/ 4400kA/A A45AA0 /Ah /03 4 040at070cc44nA//AStO LA AAS/453A sAs 434/ 64 & 0305003431 A/A 44Ao0*01 licO- Ak AC A0SA/ P,-A/A 006405 .aaSt04J*4AS00//4,cc A, 0059 00-040 / /sscc& 4oAs/646o 9543 Aol A//A/A9A/ bA/SO-400 7k JAS7/\ /0 A09/AA/AA ~iYIOM kSOod 4 I/o/gcob4970/00/A ASASA 05 - - fly _____________________________________/SALAA7g P6A7EIS -I A/Si 6c 00550 9SOsA0A0 9007 6/0,AAs tA079 F# WARS 0 CNA/fF/0A7311/PS 15 FZY-09F MACA005 Sr PASO MAN rUVFOJ Ap 000 coOk 54-5 s*ocy 9050 4,cA y- SAl AAAAA4Ay/AA AsAsy /c JA17A Ail4 05049 AL3ASA 030 5, /4c *A AA/kAA plsl47Aco4 i44d AOl 01 0030/00 l9lisA -j 1 C cn N m z w m cn m m November1981 59 ne autnor ileni ii i-i- world Lnamps accepng nanasnake irom IIZIIUK oru-IZnaR A40 stable glide projected side area ofa dihedral tailpiane acts additional fin area effect described article Mr Burns Air International January 1980 pages 24 25 tailpiane dihedral placed front fin acts dorsal extension fin helps produce additional directional stability dorsal fin effective large angles sideslip extends lift slope fin larger angle sideslip thus delays fin Fig 1 Small effect over small angles ofDelayed fin wsideslipstall odorsal fin ZFin stall 4 6 4 SIDESLIP Dorsal fin area helps delay fin stall higher angles sideslip see text stall see Figure 1 Waltzing Matilda can nego tiate very tight gliding turns danger spinning due sideslip yawing effect fin tight gliding circle makes easy stay small thermal glide model appears waltz mid-air hence name rigglng flying surfaces wing 0 degrees tailplane 325 degrees also provides nose-up attitude during cruise glide allowing take better advantage rising air currents During 1979 World Champs motor wound 110 oz torque model thrown air enable get up about 30 km/hr fuselage will accommodate 16 strands Pirelli rubber 14 strands FAT rubber chosen fly 1979 Champs longer motor run Using Pirelli rubber feel prop pitch could increased about degree has tested field use new unstretched motor flight since FAI rubber pure rubber doesnt stretch much pull out far possible hang onto least 20 seconds wind 150 turns watch torque goes over 40 oz can expect maximum torque full turns wait until torque drops off settles before continuing proceed very slowly coming stopping let torque drop off avoid breaking rubber During 1979 World Champs broke motor during day motor short last fly-off make flight used motor Remaking motor 14 strands field produced uneven knotting since time getting short let go 65 oz torque never reached height could have made poor motor perhaps could have done much better Construction Apart few items will describe moment construction follows straight forward building techniques drawing should self-explanatory Fuselage motor tube long rubber will taut between hooks gives torque longer time provides smoother prop running towards end motor run does good use Montreal stop essential rear anchor age peg designed winding tube cut out holes punch made brass tubing sharpened edge cutting backup block inside fuselage dethermalizer DT timer springactivated position held off waiting thermals ply backing timer mounting placed behind balsa pylon face timer drawn hard against balsa shim make dust-proof seal leave off back cover timer save weight prefer clockwork timer over fuse because can launch instantiy miss thermal DT line braided nylon fishing line runs through tube can easily Continued page 133 60 Model Aviation Front end turned Trom aluminum Dar stock Loiiars noic prop wires place Montreal stop made aluminum pop-rivet wire Prop blades carved Pacific cedar pine strong hold airfoil profile well See text construction details dihedral stab positioned front fin produces same effect dorsal fin helping delay fin stall Wing construction includes diagonal ribs Glass threads added overthe framework underthe covering foradded torsional strength Three Kinds JET EXCITEMENT JET HAWK Ducted-Fan 40 ideal first ducted-fan sircraft strsight-forwsrd soprt model thst assembles super-quick snd flys grest Take off grass fields either ret racts fixed gear Uses jet Pump fsn unit adspts easily other types get s nearly assembled airplane $14995 Only normal f ishing materials needed complete SPAN 52 1/2 AREA550 Sq WT 51/2-61/2 lbS ENG40 PRICE $14995 JET PUMP Add $4995 extra Jet Pumos S4995 eaf F-4 PHANTOM 1/2A Sport/Scale propeller Nothing else comes close 1/2A sport/scale kitQuick responsive stable has f steady predictable sink-rate approach retracts throttle its realistic performer Comes detailed preassembled fuselage tough sheet-foam wing Includes everything needed assemble SPAN 30 WAREA241 Sq WT 19-22 oz ENG 049-1O RADIO 2-5 Channel a_ F-15 EAGLE Ducted-Fan Twin 40s 1/10 Scale Designed Duane Johnson kit builder wants exotic scale performance match thrust weight ratio better 11 machine-cut parts supplied plus hardware clear canopy Uses RhomAir retracts Designed EAGLE jet pumps available $4995 es adaptable other fan units Fantastic performance WS 48 Area 850 sq projected Fuse Lgth 72 Wt 12 lb Eng twin 40s RadIo 5-6 Ch PRICE $19995 iOE L Did know abouf select ion sport competition airplanes Send catalog today e $100 Local Dealer May Order Direct Send check money order CLo CV4 E FRONTON ST BROWNSVILLE TX 78520 512 541-3867 Society will grant Model Year award ubiquitous Lacey Waltzing Matilda/VanLeuven Continued page 60 replaced necessary figured 40mm stretch line pull tailpiane hard down ensure alignment pylon last glued piece set place model completely assembled obtain conect CG location Propeller front end propeller requires care carving Use light C-grain balsa cover light glass nylon cloth thickness shown drawing finished thickness Solareraft presents 2 new fun flyers Selar Dart t2 rubber powered helicopter climbs over 250 53eO postage paidl ready fly S*lar Scamp 12 high performance free flying stick model $400 postage paid ready fly Send chock money order Solareraft PO Box 0825 Santa Barbara CA 031 tealer i aqo nec invited bare wood before covering finishing should 3 4mm thinner figure Use least three coats epoxy sand smooth wet-or-dry sandpaper between coats achieve glass-smooth finish Note ARA-D airfoil section has its thickest part approximately 22 24% leading edge must parabolic shape airfoil gives thrust also produces better traction power cruise mode others tend fail Check frequently calipers certain both blades exactly same also make certain weigh same used dural stud connect prop hinge could adjusted required pitch best prop/rubber combination found 31 deg 70% hub best 14 strands FM rubber needs fabricate some sort prop pitch gauge check Avasusnunrriuenonocourr ac-orpeaca JB 5peoiI MK III 84 Mono 78 Ripe Weight 18 Ins2185 Troeol Air 2000 105 Classic Ocole Riplune 23 lbs 2295 Tronel Air 4000 98 Rediel Peg Classic Ripe 23 lOs2290 Fokkor 0-vIl 88 German WW Fighter Ripe 23 lbs 2495 coning Soon Soowirt Pop 50 Ripe Sopocirlr Teonqocod 50 Triplane Waco AID Lyleck Vnrsoo 50 Spleen Oreopon 11 05 Riplane 30 Ocole Fokker DRI 72 TryIeee Plans shipped U P S Parcel Posr P/ease add $300 forgostaqe avid hand/mo fastesr senricp send posMi money order No C 00 orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 blades field nose block hard balsa turned drill ply faces epoxied later use plenty dope between stages turning sanding balsa will split Aluminum round bar stock used Montreal stop ends turned down holes drilled suit groove side locates pivot wires retained collar drawn over ends could also use nylon thread epoxy bind pivot wires stop pins made pop rivet wire have groove filed locate MW circlip holds springs place Flying surfaces best trace wing tip tracing paper build wing tip reverse other tip construction Continued page 135 * * **WANDITTM * PAT PEN *Peel off Stick Abrasives * * * *Wet dry * *Dee * * *year warranty Accurate10 ft CORD power finishing both beginger vopert alike Harry Save $ $ $ $ *20% off limited time direct mfg *Re * 0905 Model Builder Special ltd * two flat half-round *NOW $8124 five 6 grits *Additional Wands Abrasives available dd $300 shippingTexas 5O/ Sales Tas lIBIS ELMORE Eve No 214 288 5789 * on 266 aite Texas 75149 * November1981 133 4 sort poor mans Hoerner tip light nose up Carry out tests often 2 DT line OK properly hooked up strong surfaces covered light no two flights will same weather 3 DT timer functioning set modelspan doped 50/50 three conditions same day proper time times After trimming seal surfaces Finally try maximum power flights 4 wing tailplane properly seated coat polyurethane varnish minute duration get climb right Adjust 5 trim tab warps same down side thrust climb similar before time should make 2zi turns way ensure success can leave nothing up model trimmed out fine chance Failure ones own mistake thats never worried looked providing prefer simple Wakefield flies gotten 110 oz torque itself Happy flying Trimming After normal incidence adjust ments should make series 1 Yz-min test flights approximately three-fourths full turns adjust glide 66% CG gliding turns should take least 18 20 seconds complete should about 75 feet di ameter loses height too quickly open out turn shim up trailing edge tailplane Constantly check wing tailpiane seat ing location keep eye out warps Use shifting weight arrive best CG location glide should glide distinct bank PROP-PAINTING PATTERNS Paint Prop Tips Safety fun pruiect Fits up te 14 props 5 different designs * Props con decerated seconds [* Use foverite color spray point Lightly gummed reusable I* Designs duplicate fur beth ends Wrap-amends match front back III Eliminates imbalance $695 CA res odd 6% tao SEND TO II SELECT-A-PRODUCTS Iii P0 Box 259 Palo Cedro CA 96073 II Launch checklist Make habit going over checklist before release remember Murphys law 1 Note nose plug properly fitted SAFE FLYING IS NO ACCIDENT 2 Sneol STINSON RELIANT 5R0 pine net @ $1000 60 1* Engine. U Wingupon 2 FoIl Size sheets Dranings Conot Maneal Please add 5250 Postate & Haedliet Perrial Kits available designs. Send Cash Check Money Order Richard G Barron 10529 Puget Peoria Arizona 85345 AMA Building Fund Continued page 63 new home raising $2 per mem ber Beyond another thought consider member donate $1427 entire building including November1981 135 SPORT SCALE AT ITS FINEST Its Radio Control /4 teal STINSON RELIANT 5E-9 plan sal @ $2000 Fe Kinds type Engines 126 Wlngupen S FoIl Slee sheets Ornanets avith Conor Macoat IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL$10695 QUADRA MARINE engine$12495 QUADRA REPAIR$1000 pies parts KIORITZ engine 244 cc in$19995 Jim Meager ERCOUPEPL NS $2195 KIT $21995 Jim MesserTOMAHAWKPLANS $2195 KIT$23995 BALSA BASSWOOD sizesl40% OFF concept FLEET KIT-$17995 P0 Cowl$1995 paw RADIAL ENGINES set SI Fleet $2995 t/0 VICKERS LEWIS MACHINE GUN KITS $1495 10 die COVERED WHEELS USA Pup$2a95 PLANS SUPER STEARMAN r/0 Godfrey $2495 STARDUSTER TOO 4 Brisighella $2995 WACO HKS-7 GREAT LAKES r/0 Rosenstock $2495 VOLKSPLANE r/ Chicken Charlie $2195 FLY BABY /s$lS9SSE-S /s Rausch$2495 COCKPIT KITS Stearwan Fleet F4U-1$1500 Ercoepe $1500 Tomahawk $2150 Cifabria $2495 J-3 Cub $1550 ME-i 09 $1950 Spitfire $2195 FIBERGLASS ARROW SHAFTS 5/iSo 321g 6/$1 000 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1981/11
Page Numbers: 58, 59, 60, 133, 135
OihSI SSo/ SZ5 9y35 /9~ Znflt tAO AAA N PCq Akd 5R0ATEASO "Ps- kS .A/5'n.E.Cfl .MC AAA bZntn AC -C-CA t S5/C-C -C4/ CA-CAt A-CC ACAA -C --CS-C-Cay 58 Model Aviation O J P Van Leuven THE WALTZING MATILDA Wakefield tailpiane ARA-D prop airfoil featured way model trimmed fly will placed second 1979 Taft World 1979 NFFS International Symposium now describe Championships variant ofa typical Australian Report added up design could hold its model originally center gravity design longer tail moment dihedral own against best world due CG 65% changed 66% Wakefield FF design Down Under placed second 1979 World Champion ships carefully thought out ship relatively uncompli cated reasons its unique features field moving strapped-on weight improved glide obtained wing has differential tip washout whole left tip panel wing set minus 5 degrees relative center section gives 35mm washout left tip 25mm right feature made model handle motors torque during launch easier produced correctly balanced bank glide required Frank Zaics theory also enables model go lefthand glide immediately after prop folds stay thermal hopefully have launched tailplane dihedral contributes much A4, /c-S44ccc __ cf fiS-- __ _____ _____ II -iA/ AA,/kA S hAd 4 AkAAC4Ad4, jA, 6 ___A /I_I_A__I__1ILJ_LA_I_U7VI_____ II1 41K Li11___ILAs III I IIIKIki AAc WAcssfl A/Ak 96/ 55AAA /AskA2 AS/A i/As 003 5A4 550557/A0AA 100 Ac *0004/ 4400kA/A A45AA0 /Ah /03 4 040at070cc44nA//AStO LA AAS/453A sAs 434/ 64 & 0305003431 A/A 44Ao0*01 licO- Ak AC A0SA/ P,-A/A 006405 .aaSt04J*4AS00//4,cc A, 0059 00-040 / /sscc& 4oAs/646o 9543 Aol A//A/A9A/ bA/SO-400 7k JAS7/\ /0 A09/AA/AA ~iYIOM kSOod 4 I/o/gcob4970/00/A ASASA 05 - - fly _____________________________________/SALAA7g P6A7EIS -I A/Si 6c 00550 9SOsA0A0 9007 6/0,AAs tA079 F# WARS 0 CNA/fF/0A7311/PS 15 FZY-09F MACA005 Sr PASO MAN rUVFOJ Ap 000 coOk 54-5 s*ocy 9050 4,cA y- SAl AAAAA4Ay/AA AsAsy /c JA17A Ail4 05049 AL3ASA 030 5, /4c *A AA/kAA plsl47Aco4 i44d AOl 01 0030/00 l9lisA -j 1 C cn N m z w m cn m m November1981 59 ne autnor ileni ii i-i- world Lnamps accepng nanasnake irom IIZIIUK oru-IZnaR A40 stable glide projected side area ofa dihedral tailpiane acts additional fin area effect described article Mr Burns Air International January 1980 pages 24 25 tailpiane dihedral placed front fin acts dorsal extension fin helps produce additional directional stability dorsal fin effective large angles sideslip extends lift slope fin larger angle sideslip thus delays fin Fig 1 Small effect over small angles ofDelayed fin wsideslipstall odorsal fin ZFin stall 4 6 4 SIDESLIP Dorsal fin area helps delay fin stall higher angles sideslip see text stall see Figure 1 Waltzing Matilda can nego tiate very tight gliding turns danger spinning due sideslip yawing effect fin tight gliding circle makes easy stay small thermal glide model appears waltz mid-air hence name rigglng flying surfaces wing 0 degrees tailplane 325 degrees also provides nose-up attitude during cruise glide allowing take better advantage rising air currents During 1979 World Champs motor wound 110 oz torque model thrown air enable get up about 30 km/hr fuselage will accommodate 16 strands Pirelli rubber 14 strands FAT rubber chosen fly 1979 Champs longer motor run Using Pirelli rubber feel prop pitch could increased about degree has tested field use new unstretched motor flight since FAI rubber pure rubber doesnt stretch much pull out far possible hang onto least 20 seconds wind 150 turns watch torque goes over 40 oz can expect maximum torque full turns wait until torque drops off settles before continuing proceed very slowly coming stopping let torque drop off avoid breaking rubber During 1979 World Champs broke motor during day motor short last fly-off make flight used motor Remaking motor 14 strands field produced uneven knotting since time getting short let go 65 oz torque never reached height could have made poor motor perhaps could have done much better Construction Apart few items will describe moment construction follows straight forward building techniques drawing should self-explanatory Fuselage motor tube long rubber will taut between hooks gives torque longer time provides smoother prop running towards end motor run does good use Montreal stop essential rear anchor age peg designed winding tube cut out holes punch made brass tubing sharpened edge cutting backup block inside fuselage dethermalizer DT timer springactivated position held off waiting thermals ply backing timer mounting placed behind balsa pylon face timer drawn hard against balsa shim make dust-proof seal leave off back cover timer save weight prefer clockwork timer over fuse because can launch instantiy miss thermal DT line braided nylon fishing line runs through tube can easily Continued page 133 60 Model Aviation Front end turned Trom aluminum Dar stock Loiiars noic prop wires place Montreal stop made aluminum pop-rivet wire Prop blades carved Pacific cedar pine strong hold airfoil profile well See text construction details dihedral stab positioned front fin produces same effect dorsal fin helping delay fin stall Wing construction includes diagonal ribs Glass threads added overthe framework underthe covering foradded torsional strength Three Kinds JET EXCITEMENT JET HAWK Ducted-Fan 40 ideal first ducted-fan sircraft strsight-forwsrd soprt model thst assembles super-quick snd flys grest Take off grass fields either ret racts fixed gear Uses jet Pump fsn unit adspts easily other types get s nearly assembled airplane $14995 Only normal f ishing materials needed complete SPAN 52 1/2 AREA550 Sq WT 51/2-61/2 lbS ENG40 PRICE $14995 JET PUMP Add $4995 extra Jet Pumos S4995 eaf F-4 PHANTOM 1/2A Sport/Scale propeller Nothing else comes close 1/2A sport/scale kitQuick responsive stable has f steady predictable sink-rate approach retracts throttle its realistic performer Comes detailed preassembled fuselage tough sheet-foam wing Includes everything needed assemble SPAN 30 WAREA241 Sq WT 19-22 oz ENG 049-1O RADIO 2-5 Channel a_ F-15 EAGLE Ducted-Fan Twin 40s 1/10 Scale Designed Duane Johnson kit builder wants exotic scale performance match thrust weight ratio better 11 machine-cut parts supplied plus hardware clear canopy Uses RhomAir retracts Designed EAGLE jet pumps available $4995 es adaptable other fan units Fantastic performance WS 48 Area 850 sq projected Fuse Lgth 72 Wt 12 lb Eng twin 40s RadIo 5-6 Ch PRICE $19995 iOE L Did know abouf select ion sport competition airplanes Send catalog today e $100 Local Dealer May Order Direct Send check money order CLo CV4 E FRONTON ST BROWNSVILLE TX 78520 512 541-3867 Society will grant Model Year award ubiquitous Lacey Waltzing Matilda/VanLeuven Continued page 60 replaced necessary figured 40mm stretch line pull tailpiane hard down ensure alignment pylon last glued piece set place model completely assembled obtain conect CG location Propeller front end propeller requires care carving Use light C-grain balsa cover light glass nylon cloth thickness shown drawing finished thickness Solareraft presents 2 new fun flyers Selar Dart t2 rubber powered helicopter climbs over 250 53eO postage paidl ready fly S*lar Scamp 12 high performance free flying stick model $400 postage paid ready fly Send chock money order Solareraft PO Box 0825 Santa Barbara CA 031 tealer i aqo nec invited bare wood before covering finishing should 3 4mm thinner figure Use least three coats epoxy sand smooth wet-or-dry sandpaper between coats achieve glass-smooth finish Note ARA-D airfoil section has its thickest part approximately 22 24% leading edge must parabolic shape airfoil gives thrust also produces better traction power cruise mode others tend fail Check frequently calipers certain both blades exactly same also make certain weigh same used dural stud connect prop hinge could adjusted required pitch best prop/rubber combination found 31 deg 70% hub best 14 strands FM rubber needs fabricate some sort prop pitch gauge check Avasusnunrriuenonocourr ac-orpeaca JB 5peoiI MK III 84 Mono 78 Ripe Weight 18 Ins2185 Troeol Air 2000 105 Classic Ocole Riplune 23 lbs 2295 Tronel Air 4000 98 Rediel Peg Classic Ripe 23 lOs2290 Fokkor 0-vIl 88 German WW Fighter Ripe 23 lbs 2495 coning Soon Soowirt Pop 50 Ripe Sopocirlr Teonqocod 50 Triplane Waco AID Lyleck Vnrsoo 50 Spleen Oreopon 11 05 Riplane 30 Ocole Fokker DRI 72 TryIeee Plans shipped U P S Parcel Posr P/ease add $300 forgostaqe avid hand/mo fastesr senricp send posMi money order No C 00 orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 blades field nose block hard balsa turned drill ply faces epoxied later use plenty dope between stages turning sanding balsa will split Aluminum round bar stock used Montreal stop ends turned down holes drilled suit groove side locates pivot wires retained collar drawn over ends could also use nylon thread epoxy bind pivot wires stop pins made pop rivet wire have groove filed locate MW circlip holds springs place Flying surfaces best trace wing tip tracing paper build wing tip reverse other tip construction Continued page 135 * * **WANDITTM * PAT PEN *Peel off Stick Abrasives * * * *Wet dry * *Dee * * *year warranty Accurate10 ft CORD power finishing both beginger vopert alike Harry Save $ $ $ $ *20% off limited time direct mfg *Re * 0905 Model Builder Special ltd * two flat half-round *NOW $8124 five 6 grits *Additional Wands Abrasives available dd $300 shippingTexas 5O/ Sales Tas lIBIS ELMORE Eve No 214 288 5789 * on 266 aite Texas 75149 * November1981 133 4 sort poor mans Hoerner tip light nose up Carry out tests often 2 DT line OK properly hooked up strong surfaces covered light no two flights will same weather 3 DT timer functioning set modelspan doped 50/50 three conditions same day proper time times After trimming seal surfaces Finally try maximum power flights 4 wing tailplane properly seated coat polyurethane varnish minute duration get climb right Adjust 5 trim tab warps same down side thrust climb similar before time should make 2zi turns way ensure success can leave nothing up model trimmed out fine chance Failure ones own mistake thats never worried looked providing prefer simple Wakefield flies gotten 110 oz torque itself Happy flying Trimming After normal incidence adjust ments should make series 1 Yz-min test flights approximately three-fourths full turns adjust glide 66% CG gliding turns should take least 18 20 seconds complete should about 75 feet di ameter loses height too quickly open out turn shim up trailing edge tailplane Constantly check wing tailpiane seat ing location keep eye out warps Use shifting weight arrive best CG location glide should glide distinct bank PROP-PAINTING PATTERNS Paint Prop Tips Safety fun pruiect Fits up te 14 props 5 different designs * Props con decerated seconds [* Use foverite color spray point Lightly gummed reusable I* Designs duplicate fur beth ends Wrap-amends match front back III Eliminates imbalance $695 CA res odd 6% tao SEND TO II SELECT-A-PRODUCTS Iii P0 Box 259 Palo Cedro CA 96073 II Launch checklist Make habit going over checklist before release remember Murphys law 1 Note nose plug properly fitted SAFE FLYING IS NO ACCIDENT 2 Sneol STINSON RELIANT 5R0 pine net @ $1000 60 1* Engine. U Wingupon 2 FoIl Size sheets Dranings Conot Maneal Please add 5250 Postate & Haedliet Perrial Kits available designs. Send Cash Check Money Order Richard G Barron 10529 Puget Peoria Arizona 85345 AMA Building Fund Continued page 63 new home raising $2 per mem ber Beyond another thought consider member donate $1427 entire building including November1981 135 SPORT SCALE AT ITS FINEST Its Radio Control /4 teal STINSON RELIANT 5E-9 plan sal @ $2000 Fe Kinds type Engines 126 Wlngupen S FoIl Slee sheets Ornanets avith Conor Macoat IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL$10695 QUADRA MARINE engine$12495 QUADRA REPAIR$1000 pies parts KIORITZ engine 244 cc in$19995 Jim Meager ERCOUPEPL NS $2195 KIT $21995 Jim MesserTOMAHAWKPLANS $2195 KIT$23995 BALSA BASSWOOD sizesl40% OFF concept FLEET KIT-$17995 P0 Cowl$1995 paw RADIAL ENGINES set SI Fleet $2995 t/0 VICKERS LEWIS MACHINE GUN KITS $1495 10 die COVERED WHEELS USA Pup$2a95 PLANS SUPER STEARMAN r/0 Godfrey $2495 STARDUSTER TOO 4 Brisighella $2995 WACO HKS-7 GREAT LAKES r/0 Rosenstock $2495 VOLKSPLANE r/ Chicken Charlie $2195 FLY BABY /s$lS9SSE-S /s Rausch$2495 COCKPIT KITS Stearwan Fleet F4U-1$1500 Ercoepe $1500 Tomahawk $2150 Cifabria $2495 J-3 Cub $1550 ME-i 09 $1950 Spitfire $2195 FIBERGLASS ARROW SHAFTS 5/iSo 321g 6/$1 000 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1981/11
Page Numbers: 58, 59, 60, 133, 135
OihSI SSo/ SZ5 9y35 /9~ Znflt tAO AAA N PCq Akd 5R0ATEASO "Ps- kS .A/5'n.E.Cfl .MC AAA bZntn AC -C-CA t S5/C-C -C4/ CA-CAt A-CC ACAA -C --CS-C-Cay 58 Model Aviation O J P Van Leuven THE WALTZING MATILDA Wakefield tailpiane ARA-D prop airfoil featured way model trimmed fly will placed second 1979 Taft World 1979 NFFS International Symposium now describe Championships variant ofa typical Australian Report added up design could hold its model originally center gravity design longer tail moment dihedral own against best world due CG 65% changed 66% Wakefield FF design Down Under placed second 1979 World Champion ships carefully thought out ship relatively uncompli cated reasons its unique features field moving strapped-on weight improved glide obtained wing has differential tip washout whole left tip panel wing set minus 5 degrees relative center section gives 35mm washout left tip 25mm right feature made model handle motors torque during launch easier produced correctly balanced bank glide required Frank Zaics theory also enables model go lefthand glide immediately after prop folds stay thermal hopefully have launched tailplane dihedral contributes much A4, /c-S44ccc __ cf fiS-- __ _____ _____ II -iA/ AA,/kA S hAd 4 AkAAC4Ad4, jA, 6 ___A /I_I_A__I__1ILJ_LA_I_U7VI_____ II1 41K Li11___ILAs III I IIIKIki AAc WAcssfl A/Ak 96/ 55AAA /AskA2 AS/A i/As 003 5A4 550557/A0AA 100 Ac *0004/ 4400kA/A A45AA0 /Ah /03 4 040at070cc44nA//AStO LA AAS/453A sAs 434/ 64 & 0305003431 A/A 44Ao0*01 licO- Ak AC A0SA/ P,-A/A 006405 .aaSt04J*4AS00//4,cc A, 0059 00-040 / /sscc& 4oAs/646o 9543 Aol A//A/A9A/ bA/SO-400 7k JAS7/\ /0 A09/AA/AA ~iYIOM kSOod 4 I/o/gcob4970/00/A ASASA 05 - - fly _____________________________________/SALAA7g P6A7EIS -I A/Si 6c 00550 9SOsA0A0 9007 6/0,AAs tA079 F# WARS 0 CNA/fF/0A7311/PS 15 FZY-09F MACA005 Sr PASO MAN rUVFOJ Ap 000 coOk 54-5 s*ocy 9050 4,cA y- SAl AAAAA4Ay/AA AsAsy /c JA17A Ail4 05049 AL3ASA 030 5, /4c *A AA/kAA plsl47Aco4 i44d AOl 01 0030/00 l9lisA -j 1 C cn N m z w m cn m m November1981 59 ne autnor ileni ii i-i- world Lnamps accepng nanasnake irom IIZIIUK oru-IZnaR A40 stable glide projected side area ofa dihedral tailpiane acts additional fin area effect described article Mr Burns Air International January 1980 pages 24 25 tailpiane dihedral placed front fin acts dorsal extension fin helps produce additional directional stability dorsal fin effective large angles sideslip extends lift slope fin larger angle sideslip thus delays fin Fig 1 Small effect over small angles ofDelayed fin wsideslipstall odorsal fin ZFin stall 4 6 4 SIDESLIP Dorsal fin area helps delay fin stall higher angles sideslip see text stall see Figure 1 Waltzing Matilda can nego tiate very tight gliding turns danger spinning due sideslip yawing effect fin tight gliding circle makes easy stay small thermal glide model appears waltz mid-air hence name rigglng flying surfaces wing 0 degrees tailplane 325 degrees also provides nose-up attitude during cruise glide allowing take better advantage rising air currents During 1979 World Champs motor wound 110 oz torque model thrown air enable get up about 30 km/hr fuselage will accommodate 16 strands Pirelli rubber 14 strands FAT rubber chosen fly 1979 Champs longer motor run Using Pirelli rubber feel prop pitch could increased about degree has tested field use new unstretched motor flight since FAI rubber pure rubber doesnt stretch much pull out far possible hang onto least 20 seconds wind 150 turns watch torque goes over 40 oz can expect maximum torque full turns wait until torque drops off settles before continuing proceed very slowly coming stopping let torque drop off avoid breaking rubber During 1979 World Champs broke motor during day motor short last fly-off make flight used motor Remaking motor 14 strands field produced uneven knotting since time getting short let go 65 oz torque never reached height could have made poor motor perhaps could have done much better Construction Apart few items will describe moment construction follows straight forward building techniques drawing should self-explanatory Fuselage motor tube long rubber will taut between hooks gives torque longer time provides smoother prop running towards end motor run does good use Montreal stop essential rear anchor age peg designed winding tube cut out holes punch made brass tubing sharpened edge cutting backup block inside fuselage dethermalizer DT timer springactivated position held off waiting thermals ply backing timer mounting placed behind balsa pylon face timer drawn hard against balsa shim make dust-proof seal leave off back cover timer save weight prefer clockwork timer over fuse because can launch instantiy miss thermal DT line braided nylon fishing line runs through tube can easily Continued page 133 60 Model Aviation Front end turned Trom aluminum Dar stock Loiiars noic prop wires place Montreal stop made aluminum pop-rivet wire Prop blades carved Pacific cedar pine strong hold airfoil profile well See text construction details dihedral stab positioned front fin produces same effect dorsal fin helping delay fin stall Wing construction includes diagonal ribs Glass threads added overthe framework underthe covering foradded torsional strength Three Kinds JET EXCITEMENT JET HAWK Ducted-Fan 40 ideal first ducted-fan sircraft strsight-forwsrd soprt model thst assembles super-quick snd flys grest Take off grass fields either ret racts fixed gear Uses jet Pump fsn unit adspts easily other types get s nearly assembled airplane $14995 Only normal f ishing materials needed complete SPAN 52 1/2 AREA550 Sq WT 51/2-61/2 lbS ENG40 PRICE $14995 JET PUMP Add $4995 extra Jet Pumos S4995 eaf F-4 PHANTOM 1/2A Sport/Scale propeller Nothing else comes close 1/2A sport/scale kitQuick responsive stable has f steady predictable sink-rate approach retracts throttle its realistic performer Comes detailed preassembled fuselage tough sheet-foam wing Includes everything needed assemble SPAN 30 WAREA241 Sq WT 19-22 oz ENG 049-1O RADIO 2-5 Channel a_ F-15 EAGLE Ducted-Fan Twin 40s 1/10 Scale Designed Duane Johnson kit builder wants exotic scale performance match thrust weight ratio better 11 machine-cut parts supplied plus hardware clear canopy Uses RhomAir retracts Designed EAGLE jet pumps available $4995 es adaptable other fan units Fantastic performance WS 48 Area 850 sq projected Fuse Lgth 72 Wt 12 lb Eng twin 40s RadIo 5-6 Ch PRICE $19995 iOE L Did know abouf select ion sport competition airplanes Send catalog today e $100 Local Dealer May Order Direct Send check money order CLo CV4 E FRONTON ST BROWNSVILLE TX 78520 512 541-3867 Society will grant Model Year award ubiquitous Lacey Waltzing Matilda/VanLeuven Continued page 60 replaced necessary figured 40mm stretch line pull tailpiane hard down ensure alignment pylon last glued piece set place model completely assembled obtain conect CG location Propeller front end propeller requires care carving Use light C-grain balsa cover light glass nylon cloth thickness shown drawing finished thickness Solareraft presents 2 new fun flyers Selar Dart t2 rubber powered helicopter climbs over 250 53eO postage paidl ready fly S*lar Scamp 12 high performance free flying stick model $400 postage paid ready fly Send chock money order Solareraft PO Box 0825 Santa Barbara CA 031 tealer i aqo nec invited bare wood before covering finishing should 3 4mm thinner figure Use least three coats epoxy sand smooth wet-or-dry sandpaper between coats achieve glass-smooth finish Note ARA-D airfoil section has its thickest part approximately 22 24% leading edge must parabolic shape airfoil gives thrust also produces better traction power cruise mode others tend fail Check frequently calipers certain both blades exactly same also make certain weigh same used dural stud connect prop hinge could adjusted required pitch best prop/rubber combination found 31 deg 70% hub best 14 strands FM rubber needs fabricate some sort prop pitch gauge check Avasusnunrriuenonocourr ac-orpeaca JB 5peoiI MK III 84 Mono 78 Ripe Weight 18 Ins2185 Troeol Air 2000 105 Classic Ocole Riplune 23 lbs 2295 Tronel Air 4000 98 Rediel Peg Classic Ripe 23 lOs2290 Fokkor 0-vIl 88 German WW Fighter Ripe 23 lbs 2495 coning Soon Soowirt Pop 50 Ripe Sopocirlr Teonqocod 50 Triplane Waco AID Lyleck Vnrsoo 50 Spleen Oreopon 11 05 Riplane 30 Ocole Fokker DRI 72 TryIeee Plans shipped U P S Parcel Posr P/ease add $300 forgostaqe avid hand/mo fastesr senricp send posMi money order No C 00 orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 blades field nose block hard balsa turned drill ply faces epoxied later use plenty dope between stages turning sanding balsa will split Aluminum round bar stock used Montreal stop ends turned down holes drilled suit groove side locates pivot wires retained collar drawn over ends could also use nylon thread epoxy bind pivot wires stop pins made pop rivet wire have groove filed locate MW circlip holds springs place Flying surfaces best trace wing tip tracing paper build wing tip reverse other tip construction Continued page 135 * * **WANDITTM * PAT PEN *Peel off Stick Abrasives * * * *Wet dry * *Dee * * *year warranty Accurate10 ft CORD power finishing both beginger vopert alike Harry Save $ $ $ $ *20% off limited time direct mfg *Re * 0905 Model Builder Special ltd * two flat half-round *NOW $8124 five 6 grits *Additional Wands Abrasives available dd $300 shippingTexas 5O/ Sales Tas lIBIS ELMORE Eve No 214 288 5789 * on 266 aite Texas 75149 * November1981 133 4 sort poor mans Hoerner tip light nose up Carry out tests often 2 DT line OK properly hooked up strong surfaces covered light no two flights will same weather 3 DT timer functioning set modelspan doped 50/50 three conditions same day proper time times After trimming seal surfaces Finally try maximum power flights 4 wing tailplane properly seated coat polyurethane varnish minute duration get climb right Adjust 5 trim tab warps same down side thrust climb similar before time should make 2zi turns way ensure success can leave nothing up model trimmed out fine chance Failure ones own mistake thats never worried looked providing prefer simple Wakefield flies gotten 110 oz torque itself Happy flying Trimming After normal incidence adjust ments should make series 1 Yz-min test flights approximately three-fourths full turns adjust glide 66% CG gliding turns should take least 18 20 seconds complete should about 75 feet di ameter loses height too quickly open out turn shim up trailing edge tailplane Constantly check wing tailpiane seat ing location keep eye out warps Use shifting weight arrive best CG location glide should glide distinct bank PROP-PAINTING PATTERNS Paint Prop Tips Safety fun pruiect Fits up te 14 props 5 different designs * Props con decerated seconds [* Use foverite color spray point Lightly gummed reusable I* Designs duplicate fur beth ends Wrap-amends match front back III Eliminates imbalance $695 CA res odd 6% tao SEND TO II SELECT-A-PRODUCTS Iii P0 Box 259 Palo Cedro CA 96073 II Launch checklist Make habit going over checklist before release remember Murphys law 1 Note nose plug properly fitted SAFE FLYING IS NO ACCIDENT 2 Sneol STINSON RELIANT 5R0 pine net @ $1000 60 1* Engine. U Wingupon 2 FoIl Size sheets Dranings Conot Maneal Please add 5250 Postate & Haedliet Perrial Kits available designs. Send Cash Check Money Order Richard G Barron 10529 Puget Peoria Arizona 85345 AMA Building Fund Continued page 63 new home raising $2 per mem ber Beyond another thought consider member donate $1427 entire building including November1981 135 SPORT SCALE AT ITS FINEST Its Radio Control /4 teal STINSON RELIANT 5E-9 plan sal @ $2000 Fe Kinds type Engines 126 Wlngupen S FoIl Slee sheets Ornanets avith Conor Macoat IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL$10695 QUADRA MARINE engine$12495 QUADRA REPAIR$1000 pies parts KIORITZ engine 244 cc in$19995 Jim Meager ERCOUPEPL NS $2195 KIT $21995 Jim MesserTOMAHAWKPLANS $2195 KIT$23995 BALSA BASSWOOD sizesl40% OFF concept FLEET KIT-$17995 P0 Cowl$1995 paw RADIAL ENGINES set SI Fleet $2995 t/0 VICKERS LEWIS MACHINE GUN KITS $1495 10 die COVERED WHEELS USA Pup$2a95 PLANS SUPER STEARMAN r/0 Godfrey $2495 STARDUSTER TOO 4 Brisighella $2995 WACO HKS-7 GREAT LAKES r/0 Rosenstock $2495 VOLKSPLANE r/ Chicken Charlie $2195 FLY BABY /s$lS9SSE-S /s Rausch$2495 COCKPIT KITS Stearwan Fleet F4U-1$1500 Ercoepe $1500 Tomahawk $2150 Cifabria $2495 J-3 Cub $1550 ME-i 09 $1950 Spitfire $2195 FIBERGLASS ARROW SHAFTS 5/iSo 321g 6/$1 000 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1981/11
Page Numbers: 58, 59, 60, 133, 135
OihSI SSo/ SZ5 9y35 /9~ Znflt tAO AAA N PCq Akd 5R0ATEASO "Ps- kS .A/5'n.E.Cfl .MC AAA bZntn AC -C-CA t S5/C-C -C4/ CA-CAt A-CC ACAA -C --CS-C-Cay 58 Model Aviation O J P Van Leuven THE WALTZING MATILDA Wakefield tailpiane ARA-D prop airfoil featured way model trimmed fly will placed second 1979 Taft World 1979 NFFS International Symposium now describe Championships variant ofa typical Australian Report added up design could hold its model originally center gravity design longer tail moment dihedral own against best world due CG 65% changed 66% Wakefield FF design Down Under placed second 1979 World Champion ships carefully thought out ship relatively uncompli cated reasons its unique features field moving strapped-on weight improved glide obtained wing has differential tip washout whole left tip panel wing set minus 5 degrees relative center section gives 35mm washout left tip 25mm right feature made model handle motors torque during launch easier produced correctly balanced bank glide required Frank Zaics theory also enables model go lefthand glide immediately after prop folds stay thermal hopefully have launched tailplane dihedral contributes much A4, /c-S44ccc __ cf fiS-- __ _____ _____ II -iA/ AA,/kA S hAd 4 AkAAC4Ad4, jA, 6 ___A /I_I_A__I__1ILJ_LA_I_U7VI_____ II1 41K Li11___ILAs III I IIIKIki AAc WAcssfl A/Ak 96/ 55AAA /AskA2 AS/A i/As 003 5A4 550557/A0AA 100 Ac *0004/ 4400kA/A A45AA0 /Ah /03 4 040at070cc44nA//AStO LA AAS/453A sAs 434/ 64 & 0305003431 A/A 44Ao0*01 licO- Ak AC A0SA/ P,-A/A 006405 .aaSt04J*4AS00//4,cc A, 0059 00-040 / /sscc& 4oAs/646o 9543 Aol A//A/A9A/ bA/SO-400 7k JAS7/\ /0 A09/AA/AA ~iYIOM kSOod 4 I/o/gcob4970/00/A ASASA 05 - - fly _____________________________________/SALAA7g P6A7EIS -I A/Si 6c 00550 9SOsA0A0 9007 6/0,AAs tA079 F# WARS 0 CNA/fF/0A7311/PS 15 FZY-09F MACA005 Sr PASO MAN rUVFOJ Ap 000 coOk 54-5 s*ocy 9050 4,cA y- SAl AAAAA4Ay/AA AsAsy /c JA17A Ail4 05049 AL3ASA 030 5, /4c *A AA/kAA plsl47Aco4 i44d AOl 01 0030/00 l9lisA -j 1 C cn N m z w m cn m m November1981 59 ne autnor ileni ii i-i- world Lnamps accepng nanasnake irom IIZIIUK oru-IZnaR A40 stable glide projected side area ofa dihedral tailpiane acts additional fin area effect described article Mr Burns Air International January 1980 pages 24 25 tailpiane dihedral placed front fin acts dorsal extension fin helps produce additional directional stability dorsal fin effective large angles sideslip extends lift slope fin larger angle sideslip thus delays fin Fig 1 Small effect over small angles ofDelayed fin wsideslipstall odorsal fin ZFin stall 4 6 4 SIDESLIP Dorsal fin area helps delay fin stall higher angles sideslip see text stall see Figure 1 Waltzing Matilda can nego tiate very tight gliding turns danger spinning due sideslip yawing effect fin tight gliding circle makes easy stay small thermal glide model appears waltz mid-air hence name rigglng flying surfaces wing 0 degrees tailplane 325 degrees also provides nose-up attitude during cruise glide allowing take better advantage rising air currents During 1979 World Champs motor wound 110 oz torque model thrown air enable get up about 30 km/hr fuselage will accommodate 16 strands Pirelli rubber 14 strands FAT rubber chosen fly 1979 Champs longer motor run Using Pirelli rubber feel prop pitch could increased about degree has tested field use new unstretched motor flight since FAI rubber pure rubber doesnt stretch much pull out far possible hang onto least 20 seconds wind 150 turns watch torque goes over 40 oz can expect maximum torque full turns wait until torque drops off settles before continuing proceed very slowly coming stopping let torque drop off avoid breaking rubber During 1979 World Champs broke motor during day motor short last fly-off make flight used motor Remaking motor 14 strands field produced uneven knotting since time getting short let go 65 oz torque never reached height could have made poor motor perhaps could have done much better Construction Apart few items will describe moment construction follows straight forward building techniques drawing should self-explanatory Fuselage motor tube long rubber will taut between hooks gives torque longer time provides smoother prop running towards end motor run does good use Montreal stop essential rear anchor age peg designed winding tube cut out holes punch made brass tubing sharpened edge cutting backup block inside fuselage dethermalizer DT timer springactivated position held off waiting thermals ply backing timer mounting placed behind balsa pylon face timer drawn hard against balsa shim make dust-proof seal leave off back cover timer save weight prefer clockwork timer over fuse because can launch instantiy miss thermal DT line braided nylon fishing line runs through tube can easily Continued page 133 60 Model Aviation Front end turned Trom aluminum Dar stock Loiiars noic prop wires place Montreal stop made aluminum pop-rivet wire Prop blades carved Pacific cedar pine strong hold airfoil profile well See text construction details dihedral stab positioned front fin produces same effect dorsal fin helping delay fin stall Wing construction includes diagonal ribs Glass threads added overthe framework underthe covering foradded torsional strength Three Kinds JET EXCITEMENT JET HAWK Ducted-Fan 40 ideal first ducted-fan sircraft strsight-forwsrd soprt model thst assembles super-quick snd flys grest Take off grass fields either ret racts fixed gear Uses jet Pump fsn unit adspts easily other types get s nearly assembled airplane $14995 Only normal f ishing materials needed complete SPAN 52 1/2 AREA550 Sq WT 51/2-61/2 lbS ENG40 PRICE $14995 JET PUMP Add $4995 extra Jet Pumos S4995 eaf F-4 PHANTOM 1/2A Sport/Scale propeller Nothing else comes close 1/2A sport/scale kitQuick responsive stable has f steady predictable sink-rate approach retracts throttle its realistic performer Comes detailed preassembled fuselage tough sheet-foam wing Includes everything needed assemble SPAN 30 WAREA241 Sq WT 19-22 oz ENG 049-1O RADIO 2-5 Channel a_ F-15 EAGLE Ducted-Fan Twin 40s 1/10 Scale Designed Duane Johnson kit builder wants exotic scale performance match thrust weight ratio better 11 machine-cut parts supplied plus hardware clear canopy Uses RhomAir retracts Designed EAGLE jet pumps available $4995 es adaptable other fan units Fantastic performance WS 48 Area 850 sq projected Fuse Lgth 72 Wt 12 lb Eng twin 40s RadIo 5-6 Ch PRICE $19995 iOE L Did know abouf select ion sport competition airplanes Send catalog today e $100 Local Dealer May Order Direct Send check money order CLo CV4 E FRONTON ST BROWNSVILLE TX 78520 512 541-3867 Society will grant Model Year award ubiquitous Lacey Waltzing Matilda/VanLeuven Continued page 60 replaced necessary figured 40mm stretch line pull tailpiane hard down ensure alignment pylon last glued piece set place model completely assembled obtain conect CG location Propeller front end propeller requires care carving Use light C-grain balsa cover light glass nylon cloth thickness shown drawing finished thickness Solareraft presents 2 new fun flyers Selar Dart t2 rubber powered helicopter climbs over 250 53eO postage paidl ready fly S*lar Scamp 12 high performance free flying stick model $400 postage paid ready fly Send chock money order Solareraft PO Box 0825 Santa Barbara CA 031 tealer i aqo nec invited bare wood before covering finishing should 3 4mm thinner figure Use least three coats epoxy sand smooth wet-or-dry sandpaper between coats achieve glass-smooth finish Note ARA-D airfoil section has its thickest part approximately 22 24% leading edge must parabolic shape airfoil gives thrust also produces better traction power cruise mode others tend fail Check frequently calipers certain both blades exactly same also make certain weigh same used dural stud connect prop hinge could adjusted required pitch best prop/rubber combination found 31 deg 70% hub best 14 strands FM rubber needs fabricate some sort prop pitch gauge check Avasusnunrriuenonocourr ac-orpeaca JB 5peoiI MK III 84 Mono 78 Ripe Weight 18 Ins2185 Troeol Air 2000 105 Classic Ocole Riplune 23 lbs 2295 Tronel Air 4000 98 Rediel Peg Classic Ripe 23 lOs2290 Fokkor 0-vIl 88 German WW Fighter Ripe 23 lbs 2495 coning Soon Soowirt Pop 50 Ripe Sopocirlr Teonqocod 50 Triplane Waco AID Lyleck Vnrsoo 50 Spleen Oreopon 11 05 Riplane 30 Ocole Fokker DRI 72 TryIeee Plans shipped U P S Parcel Posr P/ease add $300 forgostaqe avid hand/mo fastesr senricp send posMi money order No C 00 orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 blades field nose block hard balsa turned drill ply faces epoxied later use plenty dope between stages turning sanding balsa will split Aluminum round bar stock used Montreal stop ends turned down holes drilled suit groove side locates pivot wires retained collar drawn over ends could also use nylon thread epoxy bind pivot wires stop pins made pop rivet wire have groove filed locate MW circlip holds springs place Flying surfaces best trace wing tip tracing paper build wing tip reverse other tip construction Continued page 135 * * **WANDITTM * PAT PEN *Peel off Stick Abrasives * * * *Wet dry * *Dee * * *year warranty Accurate10 ft CORD power finishing both beginger vopert alike Harry Save $ $ $ $ *20% off limited time direct mfg *Re * 0905 Model Builder Special ltd * two flat half-round *NOW $8124 five 6 grits *Additional Wands Abrasives available dd $300 shippingTexas 5O/ Sales Tas lIBIS ELMORE Eve No 214 288 5789 * on 266 aite Texas 75149 * November1981 133 4 sort poor mans Hoerner tip light nose up Carry out tests often 2 DT line OK properly hooked up strong surfaces covered light no two flights will same weather 3 DT timer functioning set modelspan doped 50/50 three conditions same day proper time times After trimming seal surfaces Finally try maximum power flights 4 wing tailplane properly seated coat polyurethane varnish minute duration get climb right Adjust 5 trim tab warps same down side thrust climb similar before time should make 2zi turns way ensure success can leave nothing up model trimmed out fine chance Failure ones own mistake thats never worried looked providing prefer simple Wakefield flies gotten 110 oz torque itself Happy flying Trimming After normal incidence adjust ments should make series 1 Yz-min test flights approximately three-fourths full turns adjust glide 66% CG gliding turns should take least 18 20 seconds complete should about 75 feet di ameter loses height too quickly open out turn shim up trailing edge tailplane Constantly check wing tailpiane seat ing location keep eye out warps Use shifting weight arrive best CG location glide should glide distinct bank PROP-PAINTING PATTERNS Paint Prop Tips Safety fun pruiect Fits up te 14 props 5 different designs * Props con decerated seconds [* Use foverite color spray point Lightly gummed reusable I* Designs duplicate fur beth ends Wrap-amends match front back III Eliminates imbalance $695 CA res odd 6% tao SEND TO II SELECT-A-PRODUCTS Iii P0 Box 259 Palo Cedro CA 96073 II Launch checklist Make habit going over checklist before release remember Murphys law 1 Note nose plug properly fitted SAFE FLYING IS NO ACCIDENT 2 Sneol STINSON RELIANT 5R0 pine net @ $1000 60 1* Engine. U Wingupon 2 FoIl Size sheets Dranings Conot Maneal Please add 5250 Postate & Haedliet Perrial Kits available designs. Send Cash Check Money Order Richard G Barron 10529 Puget Peoria Arizona 85345 AMA Building Fund Continued page 63 new home raising $2 per mem ber Beyond another thought consider member donate $1427 entire building including November1981 135 SPORT SCALE AT ITS FINEST Its Radio Control /4 teal STINSON RELIANT 5E-9 plan sal @ $2000 Fe Kinds type Engines 126 Wlngupen S FoIl Slee sheets Ornanets avith Conor Macoat IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL$10695 QUADRA MARINE engine$12495 QUADRA REPAIR$1000 pies parts KIORITZ engine 244 cc in$19995 Jim Meager ERCOUPEPL NS $2195 KIT $21995 Jim MesserTOMAHAWKPLANS $2195 KIT$23995 BALSA BASSWOOD sizesl40% OFF concept FLEET KIT-$17995 P0 Cowl$1995 paw RADIAL ENGINES set SI Fleet $2995 t/0 VICKERS LEWIS MACHINE GUN KITS $1495 10 die COVERED WHEELS USA Pup$2a95 PLANS SUPER STEARMAN r/0 Godfrey $2495 STARDUSTER TOO 4 Brisighella $2995 WACO HKS-7 GREAT LAKES r/0 Rosenstock $2495 VOLKSPLANE r/ Chicken Charlie $2195 FLY BABY /s$lS9SSE-S /s Rausch$2495 COCKPIT KITS Stearwan Fleet F4U-1$1500 Ercoepe $1500 Tomahawk $2150 Cifabria $2495 J-3 Cub $1550 ME-i 09 $1950 Spitfire $2195 FIBERGLASS ARROW SHAFTS 5/iSo 321g 6/$1 000 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1981/11
Page Numbers: 58, 59, 60, 133, 135
OihSI SSo/ SZ5 9y35 /9~ Znflt tAO AAA N PCq Akd 5R0ATEASO "Ps- kS .A/5'n.E.Cfl .MC AAA bZntn AC -C-CA t S5/C-C -C4/ CA-CAt A-CC ACAA -C --CS-C-Cay 58 Model Aviation O J P Van Leuven THE WALTZING MATILDA Wakefield tailpiane ARA-D prop airfoil featured way model trimmed fly will placed second 1979 Taft World 1979 NFFS International Symposium now describe Championships variant ofa typical Australian Report added up design could hold its model originally center gravity design longer tail moment dihedral own against best world due CG 65% changed 66% Wakefield FF design Down Under placed second 1979 World Champion ships carefully thought out ship relatively uncompli cated reasons its unique features field moving strapped-on weight improved glide obtained wing has differential tip washout whole left tip panel wing set minus 5 degrees relative center section gives 35mm washout left tip 25mm right feature made model handle motors torque during launch easier produced correctly balanced bank glide required Frank Zaics theory also enables model go lefthand glide immediately after prop folds stay thermal hopefully have launched tailplane dihedral contributes much A4, /c-S44ccc __ cf fiS-- __ _____ _____ II -iA/ AA,/kA S hAd 4 AkAAC4Ad4, jA, 6 ___A /I_I_A__I__1ILJ_LA_I_U7VI_____ II1 41K Li11___ILAs III I IIIKIki AAc WAcssfl A/Ak 96/ 55AAA /AskA2 AS/A i/As 003 5A4 550557/A0AA 100 Ac *0004/ 4400kA/A A45AA0 /Ah /03 4 040at070cc44nA//AStO LA AAS/453A sAs 434/ 64 & 0305003431 A/A 44Ao0*01 licO- Ak AC A0SA/ P,-A/A 006405 .aaSt04J*4AS00//4,cc A, 0059 00-040 / /sscc& 4oAs/646o 9543 Aol A//A/A9A/ bA/SO-400 7k JAS7/\ /0 A09/AA/AA ~iYIOM kSOod 4 I/o/gcob4970/00/A ASASA 05 - - fly _____________________________________/SALAA7g P6A7EIS -I A/Si 6c 00550 9SOsA0A0 9007 6/0,AAs tA079 F# WARS 0 CNA/fF/0A7311/PS 15 FZY-09F MACA005 Sr PASO MAN rUVFOJ Ap 000 coOk 54-5 s*ocy 9050 4,cA y- SAl AAAAA4Ay/AA AsAsy /c JA17A Ail4 05049 AL3ASA 030 5, /4c *A AA/kAA plsl47Aco4 i44d AOl 01 0030/00 l9lisA -j 1 C cn N m z w m cn m m November1981 59 ne autnor ileni ii i-i- world Lnamps accepng nanasnake irom IIZIIUK oru-IZnaR A40 stable glide projected side area ofa dihedral tailpiane acts additional fin area effect described article Mr Burns Air International January 1980 pages 24 25 tailpiane dihedral placed front fin acts dorsal extension fin helps produce additional directional stability dorsal fin effective large angles sideslip extends lift slope fin larger angle sideslip thus delays fin Fig 1 Small effect over small angles ofDelayed fin wsideslipstall odorsal fin ZFin stall 4 6 4 SIDESLIP Dorsal fin area helps delay fin stall higher angles sideslip see text stall see Figure 1 Waltzing Matilda can nego tiate very tight gliding turns danger spinning due sideslip yawing effect fin tight gliding circle makes easy stay small thermal glide model appears waltz mid-air hence name rigglng flying surfaces wing 0 degrees tailplane 325 degrees also provides nose-up attitude during cruise glide allowing take better advantage rising air currents During 1979 World Champs motor wound 110 oz torque model thrown air enable get up about 30 km/hr fuselage will accommodate 16 strands Pirelli rubber 14 strands FAT rubber chosen fly 1979 Champs longer motor run Using Pirelli rubber feel prop pitch could increased about degree has tested field use new unstretched motor flight since FAI rubber pure rubber doesnt stretch much pull out far possible hang onto least 20 seconds wind 150 turns watch torque goes over 40 oz can expect maximum torque full turns wait until torque drops off settles before continuing proceed very slowly coming stopping let torque drop off avoid breaking rubber During 1979 World Champs broke motor during day motor short last fly-off make flight used motor Remaking motor 14 strands field produced uneven knotting since time getting short let go 65 oz torque never reached height could have made poor motor perhaps could have done much better Construction Apart few items will describe moment construction follows straight forward building techniques drawing should self-explanatory Fuselage motor tube long rubber will taut between hooks gives torque longer time provides smoother prop running towards end motor run does good use Montreal stop essential rear anchor age peg designed winding tube cut out holes punch made brass tubing sharpened edge cutting backup block inside fuselage dethermalizer DT timer springactivated position held off waiting thermals ply backing timer mounting placed behind balsa pylon face timer drawn hard against balsa shim make dust-proof seal leave off back cover timer save weight prefer clockwork timer over fuse because can launch instantiy miss thermal DT line braided nylon fishing line runs through tube can easily Continued page 133 60 Model Aviation Front end turned Trom aluminum Dar stock Loiiars noic prop wires place Montreal stop made aluminum pop-rivet wire Prop blades carved Pacific cedar pine strong hold airfoil profile well See text construction details dihedral stab positioned front fin produces same effect dorsal fin helping delay fin stall Wing construction includes diagonal ribs Glass threads added overthe framework underthe covering foradded torsional strength Three Kinds JET EXCITEMENT JET HAWK Ducted-Fan 40 ideal first ducted-fan sircraft strsight-forwsrd soprt model thst assembles super-quick snd flys grest Take off grass fields either ret racts fixed gear Uses jet Pump fsn unit adspts easily other types get s nearly assembled airplane $14995 Only normal f ishing materials needed complete SPAN 52 1/2 AREA550 Sq WT 51/2-61/2 lbS ENG40 PRICE $14995 JET PUMP Add $4995 extra Jet Pumos S4995 eaf F-4 PHANTOM 1/2A Sport/Scale propeller Nothing else comes close 1/2A sport/scale kitQuick responsive stable has f steady predictable sink-rate approach retracts throttle its realistic performer Comes detailed preassembled fuselage tough sheet-foam wing Includes everything needed assemble SPAN 30 WAREA241 Sq WT 19-22 oz ENG 049-1O RADIO 2-5 Channel a_ F-15 EAGLE Ducted-Fan Twin 40s 1/10 Scale Designed Duane Johnson kit builder wants exotic scale performance match thrust weight ratio better 11 machine-cut parts supplied plus hardware clear canopy Uses RhomAir retracts Designed EAGLE jet pumps available $4995 es adaptable other fan units Fantastic performance WS 48 Area 850 sq projected Fuse Lgth 72 Wt 12 lb Eng twin 40s RadIo 5-6 Ch PRICE $19995 iOE L Did know abouf select ion sport competition airplanes Send catalog today e $100 Local Dealer May Order Direct Send check money order CLo CV4 E FRONTON ST BROWNSVILLE TX 78520 512 541-3867 Society will grant Model Year award ubiquitous Lacey Waltzing Matilda/VanLeuven Continued page 60 replaced necessary figured 40mm stretch line pull tailpiane hard down ensure alignment pylon last glued piece set place model completely assembled obtain conect CG location Propeller front end propeller requires care carving Use light C-grain balsa cover light glass nylon cloth thickness shown drawing finished thickness Solareraft presents 2 new fun flyers Selar Dart t2 rubber powered helicopter climbs over 250 53eO postage paidl ready fly S*lar Scamp 12 high performance free flying stick model $400 postage paid ready fly Send chock money order Solareraft PO Box 0825 Santa Barbara CA 031 tealer i aqo nec invited bare wood before covering finishing should 3 4mm thinner figure Use least three coats epoxy sand smooth wet-or-dry sandpaper between coats achieve glass-smooth finish Note ARA-D airfoil section has its thickest part approximately 22 24% leading edge must parabolic shape airfoil gives thrust also produces better traction power cruise mode others tend fail Check frequently calipers certain both blades exactly same also make certain weigh same used dural stud connect prop hinge could adjusted required pitch best prop/rubber combination found 31 deg 70% hub best 14 strands FM rubber needs fabricate some sort prop pitch gauge check Avasusnunrriuenonocourr ac-orpeaca JB 5peoiI MK III 84 Mono 78 Ripe Weight 18 Ins2185 Troeol Air 2000 105 Classic Ocole Riplune 23 lbs 2295 Tronel Air 4000 98 Rediel Peg Classic Ripe 23 lOs2290 Fokkor 0-vIl 88 German WW Fighter Ripe 23 lbs 2495 coning Soon Soowirt Pop 50 Ripe Sopocirlr Teonqocod 50 Triplane Waco AID Lyleck Vnrsoo 50 Spleen Oreopon 11 05 Riplane 30 Ocole Fokker DRI 72 TryIeee Plans shipped U P S Parcel Posr P/ease add $300 forgostaqe avid hand/mo fastesr senricp send posMi money order No C 00 orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 blades field nose block hard balsa turned drill ply faces epoxied later use plenty dope between stages turning sanding balsa will split Aluminum round bar stock used Montreal stop ends turned down holes drilled suit groove side locates pivot wires retained collar drawn over ends could also use nylon thread epoxy bind pivot wires stop pins made pop rivet wire have groove filed locate MW circlip holds springs place Flying surfaces best trace wing tip tracing paper build wing tip reverse other tip construction Continued page 135 * * **WANDITTM * PAT PEN *Peel off Stick Abrasives * * * *Wet dry * *Dee * * *year warranty Accurate10 ft CORD power finishing both beginger vopert alike Harry Save $ $ $ $ *20% off limited time direct mfg *Re * 0905 Model Builder Special ltd * two flat half-round *NOW $8124 five 6 grits *Additional Wands Abrasives available dd $300 shippingTexas 5O/ Sales Tas lIBIS ELMORE Eve No 214 288 5789 * on 266 aite Texas 75149 * November1981 133 4 sort poor mans Hoerner tip light nose up Carry out tests often 2 DT line OK properly hooked up strong surfaces covered light no two flights will same weather 3 DT timer functioning set modelspan doped 50/50 three conditions same day proper time times After trimming seal surfaces Finally try maximum power flights 4 wing tailplane properly seated coat polyurethane varnish minute duration get climb right Adjust 5 trim tab warps same down side thrust climb similar before time should make 2zi turns way ensure success can leave nothing up model trimmed out fine chance Failure ones own mistake thats never worried looked providing prefer simple Wakefield flies gotten 110 oz torque itself Happy flying Trimming After normal incidence adjust ments should make series 1 Yz-min test flights approximately three-fourths full turns adjust glide 66% CG gliding turns should take least 18 20 seconds complete should about 75 feet di ameter loses height too quickly open out turn shim up trailing edge tailplane Constantly check wing tailpiane seat ing location keep eye out warps Use shifting weight arrive best CG location glide should glide distinct bank PROP-PAINTING PATTERNS Paint Prop Tips Safety fun pruiect Fits up te 14 props 5 different designs * Props con decerated seconds [* Use foverite color spray point Lightly gummed reusable I* Designs duplicate fur beth ends Wrap-amends match front back III Eliminates imbalance $695 CA res odd 6% tao SEND TO II SELECT-A-PRODUCTS Iii P0 Box 259 Palo Cedro CA 96073 II Launch checklist Make habit going over checklist before release remember Murphys law 1 Note nose plug properly fitted SAFE FLYING IS NO ACCIDENT 2 Sneol STINSON RELIANT 5R0 pine net @ $1000 60 1* Engine. U Wingupon 2 FoIl Size sheets Dranings Conot Maneal Please add 5250 Postate & Haedliet Perrial Kits available designs. Send Cash Check Money Order Richard G Barron 10529 Puget Peoria Arizona 85345 AMA Building Fund Continued page 63 new home raising $2 per mem ber Beyond another thought consider member donate $1427 entire building including November1981 135 SPORT SCALE AT ITS FINEST Its Radio Control /4 teal STINSON RELIANT 5E-9 plan sal @ $2000 Fe Kinds type Engines 126 Wlngupen S FoIl Slee sheets Ornanets avith Conor Macoat IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL$10695 QUADRA MARINE engine$12495 QUADRA REPAIR$1000 pies parts KIORITZ engine 244 cc in$19995 Jim Meager ERCOUPEPL NS $2195 KIT $21995 Jim MesserTOMAHAWKPLANS $2195 KIT$23995 BALSA BASSWOOD sizesl40% OFF concept FLEET KIT-$17995 P0 Cowl$1995 paw RADIAL ENGINES set SI Fleet $2995 t/0 VICKERS LEWIS MACHINE GUN KITS $1495 10 die COVERED WHEELS USA Pup$2a95 PLANS SUPER STEARMAN r/0 Godfrey $2495 STARDUSTER TOO 4 Brisighella $2995 WACO HKS-7 GREAT LAKES r/0 Rosenstock $2495 VOLKSPLANE r/ Chicken Charlie $2195 FLY BABY /s$lS9SSE-S /s Rausch$2495 COCKPIT KITS Stearwan Fleet F4U-1$1500 Ercoepe $1500 Tomahawk $2150 Cifabria $2495 J-3 Cub $1550 ME-i 09 $1950 Spitfire $2195 FIBERGLASS ARROW SHAFTS 5/iSo 321g 6/$1 000 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706