Here designs literally fly themselves hands-off perform ance Learn relaxed thrill flying RIC lying backl Build WE Plan n Pattern Sets ACEIRuLER 40 40 Wing 049 09 Engines RCFF-11 ACEIRULER 54 RCFF-6 9 54 Wing 15 35 Engines ACERULER $4 IRCFF-9 5 94 Wing 75 26 Engines Fastest Climbing FF Ever SKY BUGGY 32 32 WIngs 049 12 Engines RCFF-14 695 SKY BUGGY 42 IRCFF-12 5 42 WIngs 29 65 Engines SKY BUGGY 74 IRCFF-10 $1995 74 WIngs 78 26 Engines Amphibious Flying Best Two Worlds SEA KITTEN 048 12 Engines AC7J RCFF-16 SEACATIRCFF-13$1999 U Wing 15 40 Engines SEA LION IRCFF-15 9 102 Wing 78 26 Engines 5esed Henry Struck origins Best Stunt Trainers Can Fly Themselves MINI HOG 48 049 12 Engines RCT-3 ASTRO HOG 54 RCT-1 1 54 Wing 15 40 Engines MIGHTY HOG 04 RCT-2 $2495 $4 Wing 78 26 Engines Friendly Giant SUPER BUCCANEER 86 RCFF-1 9 65Wing 35 78 Engines Smaller Version Super-Buccaneer SUPER BUCCANEER66 66 Wing ForlSto29Engines RCFF-4 9 Easy-to-Build Clip-Wing High Climber BUCCANEER STANDARD 66 Wing 35 60 Engines RCFF-5 68 18 40 ~lIIP Classic Beauty SNOW WHITE 68 RCFF-7 9 Wing ForEngines Soaring Beauty CUSTOM CAVALIER 76 76 Wing 12 35 Engines RCFF-6 9 Two-Meter Powered Soarer -The Very Best SINBAD 78 76 Wing 049 12 Engines RCG-1 Original AMA F/F Trainer Great Electric-Power Too SUPER BRIGADIER 44 44 Wing 03 Q9 Engines RCFF-3 SUPER BRIGADIER 68 RCFF-2 $999 68 WIng 15 40 Engines SIll Effleger Fesedsg Mee&er AMA NFIS Hell ef Ferns Prices ere complete plans sub-essemblies end deteiled perts list Add $200 mailing tube Seed Brochure Free Flight & Scale lans including Giant Scale Send $100 its refundable first order WE TECHNICAL SERVICES P0 Box 76884-A Atlanta GA 30328 Airfoils Moments does wing Cambered airfoil have negative moment question headlined article appearing October 1985 issue Unfortunately feel diagrams discussion article failed answer question Since appears interest articles like previously thought following excerpt text should interest may explain existence pitch ing moment zero lift considering type pressure distribution exists under condition symmetrical section pressure distribution over upper lower surfaces must same zero lift no couple pitching moment can produced however cause lack symmetry cam bered airfoil distribution pressure over upper lower surfaces same zero lift means although up-load upper surface bal anced down-load lower surface resultants pressure forces upper lower surfaces colinear unbalanced couple exists couple produces moment zero lift cambered airfoil problem Lets Talk About Airplane Design article October issue seems arise incorrect definition center ofpressure cp Cor rectly point along chord moment zero forces about point can denoted lift drag alone forces physically act two easy routes recognizing First definition Some posi tive moment must cancel negative mo ment due shape lift vector acting aemdynamic center ac times distance between ac cp Since constant speed moment offset also constant cp must travel angle attack changes Second cp can travel completely outside wings boundaries physi cally impossible resultant pressure force developed wing can act cp concept archaic what ever merit might have years gone Continued page 10 8 Model Aviation JetWs Editor letters will carefully considered general interest used Send Mod1 Aviation 1810 Samuel Morse Dr Reston VA 22090 NE .EEEE.E SIG QUALITY FUELS Special Igniters improve cold starting idle characteristicsU High Film Strength Additives increase lubricity provide maximun1 lean run protection Special Detergents help prevent varnish promote clean burning Rust Preventatives protect expensive engines corrosion FREIGHT COLLECT U PINT55 GAL DRUM $17500 $2400 $31000 $37400 $50000 $64000 0% NITRO$295 5% NITRO$350 10% NITRO$395 15% NITRO$415 25% NITRO$475 35% NITRO$550 FUEL QUARTGALLON $425$995 $495$1195 $525$1395 $5951595 1995 $795$2395 U U U U U U SIG PREMIUM 4-STROKE FUE 10% NITRO$395$525$1350$29500 15% NITRO$415$595$1550$35900 THE CHOICE OF CHAMPION FLYERS 20 years SIG has blending fuel finest quality ingredients available alcohol i ove 5Tpu e very best grade available nitro use 100 o pure get honest portiO volume maximum lubrication get perfect 50/50 blend Bakers AA Castob U o echniplate Racing Oil protect expensive engines finest quality fuel tha can made price Dont take word try some judge yourselfl See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 Prices suhiect change nOtice SIG CHAMPION 2-STROKE FREE SHIPPING ON ORDERS OVER $1500 U U U U U U U U U U U U U U U U I U U incorporated modem aerody nainic theory author also stated following cambered wing alone exhibits negative moment attached fuselage having no tail combination generally produces positive moment Later correctly pointed out success plane tail required net positive moment forward ac center gravity cg location should therefore possible construct successful tailless glider no movable surfaces simply adding fuselage say Clark Y wing locating cg properly cited analysis valid Editor dont mean picking nits reading article didnt convey us would possible think author actually tried construct such configuration would fail utterly wish said either nothing subject something other what did John Browalee Decatur AL Movies Models pictures Movie Picture Camera Plane takes motion pictures flying know new thing however have read anything subject motion pictures being taken model airplane DGA DesignS 00 DGA OS DG4 DesignS5 00 00 0 S C 01 w $3 0 4 0 0 0 0 QiiarterMaster SSPORT BiPE $3 0OuARTER SCALE PLANSQuarter Master Sport Blpe Quadra 35.73Spafl.EZ build. Great Flywr.eSemXt AaiaOie 0 DAVIS DIK 905 Span. Quadra 35 pOwer O Similar. C KINNER SPORTSTER S Model K.117 Span.O35 power. 31 __________________ 0 4-CYCLE PROJECTS sEaJeKces1 0 onciePentactO Fiveepol S p sl5e 4 0 0 0 S 0 0 S ______________0 0 S 0 0 S S PHOTO DOCUMENTATION PACKS availableon Scala Plans ALL PLANS ROLLEDSHIPPED UPS Complete w instrootion awoiciat Send siQO Catalog Now VOrO Slate Heaideert eat 7% eeiee tao. Sad oheok orM0C~ .reos.niae 10 designed built model around camera provide plenty room camera servos receiver etc has 81in wingspan powered Enya 60 Weight about 18 lb camera aboard high-lift airfoil Enya 60 easily lifts fully-loaded plane air use Futaba six-channel radio oper ating camera switch normally used retracts Flipping switch acti Continued page 12 $21 s25e DAVIS D-1K 603 Snan. 45 4 cyCle orsirnilar. Two loot Sosie Once SteIn Scala 1933 KiNNER SPORTSTER j Model K. 78 Span. eI.75.4cy PPO photo reduced tram i4 Sosie piano. Two inch auaia OtiS Sloth scale Mene DSA Piano COmma 10Model Aviation U C * * * U U U U U U I U U p I I I I U U U U U U U U U U U EEEEEEEU LEVEAND GIANTS FOR GIANT SCALE BUFFS ce PeYSA ssa ax yogi cur Faa $35 Paw gil Necylece $48 80 yogi cor P40 Ban wWretl2l Red L 330 54 555ernoeIie St Oder Wertt2t ledLS48 72 cc us$114 c&5 $43 84 Poilker 07 Ftr . S39 02 Hewed nec lie $4C ax Howe4 Pete lore $32 77 Boeing 8170 Fort $33 70 Beylet OeeBeo .$33 lu3 Bee 6170 Fort $35 paa 508 324 ao Deco i140A Ob. 332 sag $32r 108 5ikar S38 Awiril 049 P4E $42 00 Bot tux 5porr . $30 08 Ftr $54 9$ lee lxx sport . $49rt 02 Looblteed vega $24 90 5tintALOre Wing $30 74 Doolittiot 08 $48 80 Mertic 74 TdM1 u39 95 Meiracoape sport S3ar75 H-Pa xdxx Orreb $35 sx Ccli spr Ocildog $43 lxx HPO x4xx Oonn $49 107 Aereeco ca Spi $33r 08 0Oorrocee \iToii $39 ogiet 030 Ob $22 77 Lucawbe sedon 825 * 122 $oogie038Ob34O773NA Mild Oem1 340 94 Page cart Racer 545 05 MMorooder 020 349 71 Martin 810 Bewb $29 01 $9 Motctrite Oh $42 70 Tanner WW gec $33 100 OH MotnuBoreb $35 a4car Oeatiii PttC2 $42 e steer PTl7i1eydtl $San 94 car Gothic F1t3 $54 99 NIlk Widow pat $09 04 DaHan cowet lao 024 71 Doug $c3 Troc $32. 32 HowMrMailigeo $32 95 hero 013 Tree $33 * 94 HewMr Moiligen S45 04 Hicrlct Teocce 13 832 03 Bai08 P-3M FIr $34 108 cox2ul/4 155 $54i 84 Boeing P20A FIr $48 00 Ooiigieo M2 Moil $34 09 Ware c4 cabin $30 08 Irittol Boildeg FIr $35 04 Beech c17l Stag $28 39 ErownnereMotA $54 90 leech C17B Stag 1491 1070 33 loch 11 Blactra $30 73 Tro $2 tech 11 Eteetre $40 107 M 62 Sticcen 21W 587 $14 91 Lindhrgt NT 211 $39 Onten 1/W 587 $24 108 Pu oil P219 T359 132 Stireec T/W 517 $38 90 Weco Tepa Wng $39 59 Britoi Ftc P28 $20 75 Wet 4 cytende 132 8 lrietei Ptr P28 $33 100 Wetli 4 Lyterde 349 18 Brittol Pt 928 $45 57 Fe 4 TI Petro Spec $45 70 P0 0cc Werhhr p40 334 84 3 Skyrocket TF5F1 $24 114 F 8 Loch Liahtc0 P20 $38 93 cc 0 Rep SeaBee Are $34 50 14 lepSeel Arnpir 339 78 04 Piper 33 cab 5900 iltechliidenBwh338 1170Bo* 13 Grow FOP Helical $28 08 Br 55 CecIl Behy Oolt 334 54 c0 Said TI,, Deciere Price urteeei0a treiruTta otuete xneli4xx Mole SOc up ai2 Add 0% eil order thip iSA Con & Mee liteerhere itt Firlatiel rotoiea $200 lirciiideo * tertion aloe 8100 en foreian odd $100 LEyELANDMODEL&SUPPLYCo lcmaaecalac tear. nuOeue.uriutiotc-t ttt titce--tircrt I,- cauucron.erltea 102078 8121013 AVE CLIvILANO OHIO 44103 eat Oliit~a lon toSI3P ME5T DS31 2141 oaisaxx eiceaeniereucra EASY-BUILT BY RADIO CONTROL SPORT SCALETHE JAPANESE ZERO Spa 53 530 4 ha lypo wing engIne good 4 2910 45 3 04 oh.. ado lea rodder well Dea 4 COCOPY 3 6 111 Balsa tall sort. r AABSFoarnWlngCore- K. THE EASY-BUILT ZERO ISA GOOD SUBJECT FOR THE NOVICE FLYER MAKING THE TRANSITION FROM SPORT TRAINERS TO SCALE MODELS BALANCED COMBINATION OF STABILITY AND CONTROL RESPONSE GIVES YOU FEELING OF CONFI DENCE RIGHT FROM THE FIRST FLIGHT THE CONSTRUCTION IS RUGGED AND EASY TO BUILD FEATURING SHEETED FOAM WINGS BALSA SHEETED FUSELAGE BALSA SHEET TAIL AND THERMOFORMED COWL AND CANOPY COMES IN SHORT KIT FORM TO SAVE YOU MONEY KIT INCLUDES FOAM WING CORES COWL CANOPY ENGINE MOUNT LANDING GEAR BLOCKS WITH STRAPS & SCREWS HINGES PLYWOOD FIREWALL PLANS WITH TEMPLATES AND BILL OF MATERIALS NO BALSA INCLUDED PRICE $2695 ORDERING SEND CHECK OR MONEY ORDER FOR $0695 PLUS $490 POSTAGE CANADIANS ADD $650 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 LRESIDENTSADD6/ SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $360 FOR PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM CORE REPLACEMENT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE PHONE 818 4590417 FOR FAST COD SERVICE yates servo turns camera take lever stop camera Ijust flip radio switch back normal oft po sition Mack Stevens Lake Havasu City AZ picture shows daughter Laura age six Modeltech CAP 21 05 90 four-stroke power thought Nice CAP might able use magazine plane finished K&B paint flies Kraft radio amply powered 05 90 Bill Febrenbach Warren PA Kit Conversion photo demonstrates imagination ability modeler convert kit aircraft choosing original kit NEW %PRA jR/f gIRD 50 ELECTRIC GAS P9 WERE9 1 REAL R/C TRAINER GRANDMA CAN FLY 2-3 CHANNEL RADIO 49 Inch SPAN 05 ELECTRIC 949 te 15 GAS CATALOG $2001/7 $3995 619 442-4636 UWYUWWfEor 619 469-8675 W BOX 2496-MA LA MESA CA 92041 Hobby Shack Twin Ace builder Fred Snow member Lake Elsinore RC Club wanted build B-25 pictures show result best plane features retracts flaps operating bomb bay doors holding up nine bombs has two 0S 28FSR engines weight approximately 8 lb Flying excellent speed type aircraft superb HW Cameron VP Lake Elsinore RC Club Canyon Lake CA Caught Us Tsk tsk once twice did misname Folkerts SK-3 racer Cau dronon pages 91 168 No vember issue Folkerts famous Thompson Trophy winners Caudron few years later careful next time AP Wilson Welches OR 12 Model Aviation WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9675053
Edition: Model Aviation - 1986/02
Page Numbers: 8, 10, 12
Edition: Model Aviation - 1986/02
Page Numbers: 8, 10, 12
Here designs literally fly themselves hands-off perform ance Learn relaxed thrill flying RIC lying backl Build WE Plan n Pattern Sets ACEIRuLER 40 40 Wing 049 09 Engines RCFF-11 ACEIRULER 54 RCFF-6 9 54 Wing 15 35 Engines ACERULER $4 IRCFF-9 5 94 Wing 75 26 Engines Fastest Climbing FF Ever SKY BUGGY 32 32 WIngs 049 12 Engines RCFF-14 695 SKY BUGGY 42 IRCFF-12 5 42 WIngs 29 65 Engines SKY BUGGY 74 IRCFF-10 $1995 74 WIngs 78 26 Engines Amphibious Flying Best Two Worlds SEA KITTEN 048 12 Engines AC7J RCFF-16 SEACATIRCFF-13$1999 U Wing 15 40 Engines SEA LION IRCFF-15 9 102 Wing 78 26 Engines 5esed Henry Struck origins Best Stunt Trainers Can Fly Themselves MINI HOG 48 049 12 Engines RCT-3 ASTRO HOG 54 RCT-1 1 54 Wing 15 40 Engines MIGHTY HOG 04 RCT-2 $2495 $4 Wing 78 26 Engines Friendly Giant SUPER BUCCANEER 86 RCFF-1 9 65Wing 35 78 Engines Smaller Version Super-Buccaneer SUPER BUCCANEER66 66 Wing ForlSto29Engines RCFF-4 9 Easy-to-Build Clip-Wing High Climber BUCCANEER STANDARD 66 Wing 35 60 Engines RCFF-5 68 18 40 ~lIIP Classic Beauty SNOW WHITE 68 RCFF-7 9 Wing ForEngines Soaring Beauty CUSTOM CAVALIER 76 76 Wing 12 35 Engines RCFF-6 9 Two-Meter Powered Soarer -The Very Best SINBAD 78 76 Wing 049 12 Engines RCG-1 Original AMA F/F Trainer Great Electric-Power Too SUPER BRIGADIER 44 44 Wing 03 Q9 Engines RCFF-3 SUPER BRIGADIER 68 RCFF-2 $999 68 WIng 15 40 Engines SIll Effleger Fesedsg Mee&er AMA NFIS Hell ef Ferns Prices ere complete plans sub-essemblies end deteiled perts list Add $200 mailing tube Seed Brochure Free Flight & Scale lans including Giant Scale Send $100 its refundable first order WE TECHNICAL SERVICES P0 Box 76884-A Atlanta GA 30328 Airfoils Moments does wing Cambered airfoil have negative moment question headlined article appearing October 1985 issue Unfortunately feel diagrams discussion article failed answer question Since appears interest articles like previously thought following excerpt text should interest may explain existence pitch ing moment zero lift considering type pressure distribution exists under condition symmetrical section pressure distribution over upper lower surfaces must same zero lift no couple pitching moment can produced however cause lack symmetry cam bered airfoil distribution pressure over upper lower surfaces same zero lift means although up-load upper surface bal anced down-load lower surface resultants pressure forces upper lower surfaces colinear unbalanced couple exists couple produces moment zero lift cambered airfoil problem Lets Talk About Airplane Design article October issue seems arise incorrect definition center ofpressure cp Cor rectly point along chord moment zero forces about point can denoted lift drag alone forces physically act two easy routes recognizing First definition Some posi tive moment must cancel negative mo ment due shape lift vector acting aemdynamic center ac times distance between ac cp Since constant speed moment offset also constant cp must travel angle attack changes Second cp can travel completely outside wings boundaries physi cally impossible resultant pressure force developed wing can act cp concept archaic what ever merit might have years gone Continued page 10 8 Model Aviation JetWs Editor letters will carefully considered general interest used Send Mod1 Aviation 1810 Samuel Morse Dr Reston VA 22090 NE .EEEE.E SIG QUALITY FUELS Special Igniters improve cold starting idle characteristicsU High Film Strength Additives increase lubricity provide maximun1 lean run protection Special Detergents help prevent varnish promote clean burning Rust Preventatives protect expensive engines corrosion FREIGHT COLLECT U PINT55 GAL DRUM $17500 $2400 $31000 $37400 $50000 $64000 0% NITRO$295 5% NITRO$350 10% NITRO$395 15% NITRO$415 25% NITRO$475 35% NITRO$550 FUEL QUARTGALLON $425$995 $495$1195 $525$1395 $5951595 1995 $795$2395 U U U U U U SIG PREMIUM 4-STROKE FUE 10% NITRO$395$525$1350$29500 15% NITRO$415$595$1550$35900 THE CHOICE OF CHAMPION FLYERS 20 years SIG has blending fuel finest quality ingredients available alcohol i ove 5Tpu e very best grade available nitro use 100 o pure get honest portiO volume maximum lubrication get perfect 50/50 blend Bakers AA Castob U o echniplate Racing Oil protect expensive engines finest quality fuel tha can made price Dont take word try some judge yourselfl See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 Prices suhiect change nOtice SIG CHAMPION 2-STROKE FREE SHIPPING ON ORDERS OVER $1500 U U U U U U U U U U U U U U U U I U U incorporated modem aerody nainic theory author also stated following cambered wing alone exhibits negative moment attached fuselage having no tail combination generally produces positive moment Later correctly pointed out success plane tail required net positive moment forward ac center gravity cg location should therefore possible construct successful tailless glider no movable surfaces simply adding fuselage say Clark Y wing locating cg properly cited analysis valid Editor dont mean picking nits reading article didnt convey us would possible think author actually tried construct such configuration would fail utterly wish said either nothing subject something other what did John Browalee Decatur AL Movies Models pictures Movie Picture Camera Plane takes motion pictures flying know new thing however have read anything subject motion pictures being taken model airplane DGA DesignS 00 DGA OS DG4 DesignS5 00 00 0 S C 01 w $3 0 4 0 0 0 0 QiiarterMaster SSPORT BiPE $3 0OuARTER SCALE PLANSQuarter Master Sport Blpe Quadra 35.73Spafl.EZ build. Great Flywr.eSemXt AaiaOie 0 DAVIS DIK 905 Span. Quadra 35 pOwer O Similar. C KINNER SPORTSTER S Model K.117 Span.O35 power. 31 __________________ 0 4-CYCLE PROJECTS sEaJeKces1 0 onciePentactO Fiveepol S p sl5e 4 0 0 0 S 0 0 S ______________0 0 S 0 0 S S PHOTO DOCUMENTATION PACKS availableon Scala Plans ALL PLANS ROLLEDSHIPPED UPS Complete w instrootion awoiciat Send siQO Catalog Now VOrO Slate Heaideert eat 7% eeiee tao. Sad oheok orM0C~ .reos.niae 10 designed built model around camera provide plenty room camera servos receiver etc has 81in wingspan powered Enya 60 Weight about 18 lb camera aboard high-lift airfoil Enya 60 easily lifts fully-loaded plane air use Futaba six-channel radio oper ating camera switch normally used retracts Flipping switch acti Continued page 12 $21 s25e DAVIS D-1K 603 Snan. 45 4 cyCle orsirnilar. Two loot Sosie Once SteIn Scala 1933 KiNNER SPORTSTER j Model K. 78 Span. eI.75.4cy PPO photo reduced tram i4 Sosie piano. Two inch auaia OtiS Sloth scale Mene DSA Piano COmma 10Model Aviation U C * * * U U U U U U I U U p I I I I U U U U U U U U U U U EEEEEEEU LEVEAND GIANTS FOR GIANT SCALE BUFFS ce PeYSA ssa ax yogi cur Faa $35 Paw gil Necylece $48 80 yogi cor P40 Ban wWretl2l Red L 330 54 555ernoeIie St Oder Wertt2t ledLS48 72 cc us$114 c&5 $43 84 Poilker 07 Ftr . S39 02 Hewed nec lie $4C ax Howe4 Pete lore $32 77 Boeing 8170 Fort $33 70 Beylet OeeBeo .$33 lu3 Bee 6170 Fort $35 paa 508 324 ao Deco i140A Ob. 332 sag $32r 108 5ikar S38 Awiril 049 P4E $42 00 Bot tux 5porr . $30 08 Ftr $54 9$ lee lxx sport . $49rt 02 Looblteed vega $24 90 5tintALOre Wing $30 74 Doolittiot 08 $48 80 Mertic 74 TdM1 u39 95 Meiracoape sport S3ar75 H-Pa xdxx Orreb $35 sx Ccli spr Ocildog $43 lxx HPO x4xx Oonn $49 107 Aereeco ca Spi $33r 08 0Oorrocee \iToii $39 ogiet 030 Ob $22 77 Lucawbe sedon 825 * 122 $oogie038Ob34O773NA Mild Oem1 340 94 Page cart Racer 545 05 MMorooder 020 349 71 Martin 810 Bewb $29 01 $9 Motctrite Oh $42 70 Tanner WW gec $33 100 OH MotnuBoreb $35 a4car Oeatiii PttC2 $42 e steer PTl7i1eydtl $San 94 car Gothic F1t3 $54 99 NIlk Widow pat $09 04 DaHan cowet lao 024 71 Doug $c3 Troc $32. 32 HowMrMailigeo $32 95 hero 013 Tree $33 * 94 HewMr Moiligen S45 04 Hicrlct Teocce 13 832 03 Bai08 P-3M FIr $34 108 cox2ul/4 155 $54i 84 Boeing P20A FIr $48 00 Ooiigieo M2 Moil $34 09 Ware c4 cabin $30 08 Irittol Boildeg FIr $35 04 Beech c17l Stag $28 39 ErownnereMotA $54 90 leech C17B Stag 1491 1070 33 loch 11 Blactra $30 73 Tro $2 tech 11 Eteetre $40 107 M 62 Sticcen 21W 587 $14 91 Lindhrgt NT 211 $39 Onten 1/W 587 $24 108 Pu oil P219 T359 132 Stireec T/W 517 $38 90 Weco Tepa Wng $39 59 Britoi Ftc P28 $20 75 Wet 4 cytende 132 8 lrietei Ptr P28 $33 100 Wetli 4 Lyterde 349 18 Brittol Pt 928 $45 57 Fe 4 TI Petro Spec $45 70 P0 0cc Werhhr p40 334 84 3 Skyrocket TF5F1 $24 114 F 8 Loch Liahtc0 P20 $38 93 cc 0 Rep SeaBee Are $34 50 14 lepSeel Arnpir 339 78 04 Piper 33 cab 5900 iltechliidenBwh338 1170Bo* 13 Grow FOP Helical $28 08 Br 55 CecIl Behy Oolt 334 54 c0 Said TI,, Deciere Price urteeei0a treiruTta otuete xneli4xx Mole SOc up ai2 Add 0% eil order thip iSA Con & Mee liteerhere itt Firlatiel rotoiea $200 lirciiideo * tertion aloe 8100 en foreian odd $100 LEyELANDMODEL&SUPPLYCo lcmaaecalac tear. nuOeue.uriutiotc-t ttt titce--tircrt I,- cauucron.erltea 102078 8121013 AVE CLIvILANO OHIO 44103 eat Oliit~a lon toSI3P ME5T DS31 2141 oaisaxx eiceaeniereucra EASY-BUILT BY RADIO CONTROL SPORT SCALETHE JAPANESE ZERO Spa 53 530 4 ha lypo wing engIne good 4 2910 45 3 04 oh.. ado lea rodder well Dea 4 COCOPY 3 6 111 Balsa tall sort. r AABSFoarnWlngCore- K. THE EASY-BUILT ZERO ISA GOOD SUBJECT FOR THE NOVICE FLYER MAKING THE TRANSITION FROM SPORT TRAINERS TO SCALE MODELS BALANCED COMBINATION OF STABILITY AND CONTROL RESPONSE GIVES YOU FEELING OF CONFI DENCE RIGHT FROM THE FIRST FLIGHT THE CONSTRUCTION IS RUGGED AND EASY TO BUILD FEATURING SHEETED FOAM WINGS BALSA SHEETED FUSELAGE BALSA SHEET TAIL AND THERMOFORMED COWL AND CANOPY COMES IN SHORT KIT FORM TO SAVE YOU MONEY KIT INCLUDES FOAM WING CORES COWL CANOPY ENGINE MOUNT LANDING GEAR BLOCKS WITH STRAPS & SCREWS HINGES PLYWOOD FIREWALL PLANS WITH TEMPLATES AND BILL OF MATERIALS NO BALSA INCLUDED PRICE $2695 ORDERING SEND CHECK OR MONEY ORDER FOR $0695 PLUS $490 POSTAGE CANADIANS ADD $650 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 LRESIDENTSADD6/ SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $360 FOR PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM CORE REPLACEMENT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE PHONE 818 4590417 FOR FAST COD SERVICE yates servo turns camera take lever stop camera Ijust flip radio switch back normal oft po sition Mack Stevens Lake Havasu City AZ picture shows daughter Laura age six Modeltech CAP 21 05 90 four-stroke power thought Nice CAP might able use magazine plane finished K&B paint flies Kraft radio amply powered 05 90 Bill Febrenbach Warren PA Kit Conversion photo demonstrates imagination ability modeler convert kit aircraft choosing original kit NEW %PRA jR/f gIRD 50 ELECTRIC GAS P9 WERE9 1 REAL R/C TRAINER GRANDMA CAN FLY 2-3 CHANNEL RADIO 49 Inch SPAN 05 ELECTRIC 949 te 15 GAS CATALOG $2001/7 $3995 619 442-4636 UWYUWWfEor 619 469-8675 W BOX 2496-MA LA MESA CA 92041 Hobby Shack Twin Ace builder Fred Snow member Lake Elsinore RC Club wanted build B-25 pictures show result best plane features retracts flaps operating bomb bay doors holding up nine bombs has two 0S 28FSR engines weight approximately 8 lb Flying excellent speed type aircraft superb HW Cameron VP Lake Elsinore RC Club Canyon Lake CA Caught Us Tsk tsk once twice did misname Folkerts SK-3 racer Cau dronon pages 91 168 No vember issue Folkerts famous Thompson Trophy winners Caudron few years later careful next time AP Wilson Welches OR 12 Model Aviation WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9675053
Edition: Model Aviation - 1986/02
Page Numbers: 8, 10, 12
Here designs literally fly themselves hands-off perform ance Learn relaxed thrill flying RIC lying backl Build WE Plan n Pattern Sets ACEIRuLER 40 40 Wing 049 09 Engines RCFF-11 ACEIRULER 54 RCFF-6 9 54 Wing 15 35 Engines ACERULER $4 IRCFF-9 5 94 Wing 75 26 Engines Fastest Climbing FF Ever SKY BUGGY 32 32 WIngs 049 12 Engines RCFF-14 695 SKY BUGGY 42 IRCFF-12 5 42 WIngs 29 65 Engines SKY BUGGY 74 IRCFF-10 $1995 74 WIngs 78 26 Engines Amphibious Flying Best Two Worlds SEA KITTEN 048 12 Engines AC7J RCFF-16 SEACATIRCFF-13$1999 U Wing 15 40 Engines SEA LION IRCFF-15 9 102 Wing 78 26 Engines 5esed Henry Struck origins Best Stunt Trainers Can Fly Themselves MINI HOG 48 049 12 Engines RCT-3 ASTRO HOG 54 RCT-1 1 54 Wing 15 40 Engines MIGHTY HOG 04 RCT-2 $2495 $4 Wing 78 26 Engines Friendly Giant SUPER BUCCANEER 86 RCFF-1 9 65Wing 35 78 Engines Smaller Version Super-Buccaneer SUPER BUCCANEER66 66 Wing ForlSto29Engines RCFF-4 9 Easy-to-Build Clip-Wing High Climber BUCCANEER STANDARD 66 Wing 35 60 Engines RCFF-5 68 18 40 ~lIIP Classic Beauty SNOW WHITE 68 RCFF-7 9 Wing ForEngines Soaring Beauty CUSTOM CAVALIER 76 76 Wing 12 35 Engines RCFF-6 9 Two-Meter Powered Soarer -The Very Best SINBAD 78 76 Wing 049 12 Engines RCG-1 Original AMA F/F Trainer Great Electric-Power Too SUPER BRIGADIER 44 44 Wing 03 Q9 Engines RCFF-3 SUPER BRIGADIER 68 RCFF-2 $999 68 WIng 15 40 Engines SIll Effleger Fesedsg Mee&er AMA NFIS Hell ef Ferns Prices ere complete plans sub-essemblies end deteiled perts list Add $200 mailing tube Seed Brochure Free Flight & Scale lans including Giant Scale Send $100 its refundable first order WE TECHNICAL SERVICES P0 Box 76884-A Atlanta GA 30328 Airfoils Moments does wing Cambered airfoil have negative moment question headlined article appearing October 1985 issue Unfortunately feel diagrams discussion article failed answer question Since appears interest articles like previously thought following excerpt text should interest may explain existence pitch ing moment zero lift considering type pressure distribution exists under condition symmetrical section pressure distribution over upper lower surfaces must same zero lift no couple pitching moment can produced however cause lack symmetry cam bered airfoil distribution pressure over upper lower surfaces same zero lift means although up-load upper surface bal anced down-load lower surface resultants pressure forces upper lower surfaces colinear unbalanced couple exists couple produces moment zero lift cambered airfoil problem Lets Talk About Airplane Design article October issue seems arise incorrect definition center ofpressure cp Cor rectly point along chord moment zero forces about point can denoted lift drag alone forces physically act two easy routes recognizing First definition Some posi tive moment must cancel negative mo ment due shape lift vector acting aemdynamic center ac times distance between ac cp Since constant speed moment offset also constant cp must travel angle attack changes Second cp can travel completely outside wings boundaries physi cally impossible resultant pressure force developed wing can act cp concept archaic what ever merit might have years gone Continued page 10 8 Model Aviation JetWs Editor letters will carefully considered general interest used Send Mod1 Aviation 1810 Samuel Morse Dr Reston VA 22090 NE .EEEE.E SIG QUALITY FUELS Special Igniters improve cold starting idle characteristicsU High Film Strength Additives increase lubricity provide maximun1 lean run protection Special Detergents help prevent varnish promote clean burning Rust Preventatives protect expensive engines corrosion FREIGHT COLLECT U PINT55 GAL DRUM $17500 $2400 $31000 $37400 $50000 $64000 0% NITRO$295 5% NITRO$350 10% NITRO$395 15% NITRO$415 25% NITRO$475 35% NITRO$550 FUEL QUARTGALLON $425$995 $495$1195 $525$1395 $5951595 1995 $795$2395 U U U U U U SIG PREMIUM 4-STROKE FUE 10% NITRO$395$525$1350$29500 15% NITRO$415$595$1550$35900 THE CHOICE OF CHAMPION FLYERS 20 years SIG has blending fuel finest quality ingredients available alcohol i ove 5Tpu e very best grade available nitro use 100 o pure get honest portiO volume maximum lubrication get perfect 50/50 blend Bakers AA Castob U o echniplate Racing Oil protect expensive engines finest quality fuel tha can made price Dont take word try some judge yourselfl See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 Prices suhiect change nOtice SIG CHAMPION 2-STROKE FREE SHIPPING ON ORDERS OVER $1500 U U U U U U U U U U U U U U U U I U U incorporated modem aerody nainic theory author also stated following cambered wing alone exhibits negative moment attached fuselage having no tail combination generally produces positive moment Later correctly pointed out success plane tail required net positive moment forward ac center gravity cg location should therefore possible construct successful tailless glider no movable surfaces simply adding fuselage say Clark Y wing locating cg properly cited analysis valid Editor dont mean picking nits reading article didnt convey us would possible think author actually tried construct such configuration would fail utterly wish said either nothing subject something other what did John Browalee Decatur AL Movies Models pictures Movie Picture Camera Plane takes motion pictures flying know new thing however have read anything subject motion pictures being taken model airplane DGA DesignS 00 DGA OS DG4 DesignS5 00 00 0 S C 01 w $3 0 4 0 0 0 0 QiiarterMaster SSPORT BiPE $3 0OuARTER SCALE PLANSQuarter Master Sport Blpe Quadra 35.73Spafl.EZ build. 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