4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266778 136778 148778 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 84566/z7 945B6A/277 1045B6A7 106W8W 106EW 114677778 11SW II6EW 1167 124W 125W 1256 1356 1456 1556 164/2N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N 5N 8I 6778 SERIES 400C 866777 9777 W WIDE BLADE EW EXTRA WIDE N NARROW e rs tPne 0 ditor Beautiful & Ugly Planes greatly enjoyed Mr Berliners article October issue Model Aviation airplanes article caught eye othersthe highly modified An-2 biplane strange looking contraption actually has interesting history built about 15 years ago Poland flying labora tory Poles developing jetpowered agricultural biplane named Lala 1 has piston engine front jet engine back intake jet en gine can seen side just forward wings marked zebra stripes jet engine installed test effect jet blast chemicals dispersed under wings spite its unusual appearance successful test bed airplane evolved tests PZL M- 15 Belphegor jet-powered biplane jet-powered biplane world Quite few built Poland mid-1970s mostly export USSR The biplane configuration chosen provide large wing area max imum payload short wingspan tight turns required crop dusting About 10 years ago started building model Belphegor A-scale powered RK-40 Axiflo fan unit However never finished itbut havent given up yet am enclosing two photos Belphe 8 Model Aviation THE LEADER IN COM PETITION PROPELLERS tl NEW letters will carefully considered general Interest used Send Model Aviation 1810 Samuel Morse Dr Reston VA 22090 J ntinued page 10 17 Cc, iN4 Jeeny $37 $lON Mocqcio $6 $42 FeIcke 07 FIc $39- 10$ OH MocqeBeneb $55 70 $eyIe Gee-Bee $32 90 Oceec POl7Keydel $566$ Heoed Pele Bee $32- 99 NBIk Widoen P61 $69 60 Sepe~eeiee 56$ $24 71 Occo 00-3 047 $35 $9 Sepe necine S6B $35 95 Qeeg 003 047 $55 63CcHeek P-HE $42 $6 Keceke Teecee 13 $22 96Cc Heenk P60 054 64 Sled Sky-Ce01$ -74 Doolielee GB 11 $4$ 72 Cer02U 14 LOS$46 95 Menecoepe Spe, $26 10$ Ce 02014 LOS 056 *-0$ Hell Sp BcIldeg $42 60 Docqlec 14-2 Veil $24 107 Aeonee C-S SpI $25- 6$ Bkel Oclidog Fl $30 62 PIeeee4 Reec Ike $45 59 BeeeRoee MeLA $54 700ceee W-W Rec $35 107 Gece BeeccI FOP $047 E 63Cc Goehk 9110 $42 69 Liedherge NO211 $2$ 1 H4Cc Ceehk P110 $54-91 Lirdkeqe NO211 $39 46 DeHee Ceee Bee $24 96 WNWINee Bee 04$ Mclliqer $35 740 HelIde 50204 $55 Mclliqer $45 10$ PeiehPT19 17 $59. P-26A 9$ $26 60 Wece Tepee-Wine $36 P36A Fl $40- 90 Wece Tepe-Wieg $40 $2 Leek11Blcelre$4016Cebin$2675Wee6dLysondee$32 $30$49 4-AT $36 62 Sliecee 71W $B7 $1 B96 Bellenee Aiecie$40 1 S6,en 71W 5B7 02693 Leenieg C-2Aeph$69.i. 122 Sliecee 9/W 007 $3$5$ Gce J2-P Deek$39 59 Brielel Fl P2-B $207$ Gce J2-P Ocek$56 11$ $reeI Fl P2B $45 134 Leek Al Pepecee$40- 740eees Peee $451 63 leek Al Eepeeee 56 Ce Wehk P40 $24$3 Leek Ale Leprees$36 60 Veg Ce,eir P40 $3577 WWeee 121 BeAk54$ OOVegCeeejP4U $60630 Seelee EP7C1$45 7$ Leek LjghMg P-3$ 03$940 Seekeeek P70 1$57 56 BepSee-Bee Ann $2410$ S S 30 Aeph$49 74 BepSee-Bee $3960 Bee eq 00 Spe$36 70 Pipe J-3 Ceb $3990 Bee eq 100 Spe$49 106 Pipe J-3 Oem $39775 Neelhep Gen,ee$409$ Leek Hcdeen Beeb 03$96 Nelhep Gennene$75 30cc, P69 Helleet $2890 SlincA Ieee 31A$$5677 Beeleg B-17G Pe $3560 SlincA Leee 3/14$42103 Bee $17G Pe$ $551200 neA Leee 314003 68 Wed WkieIeeied $3270 Ceecel Ce OBYSA$42 6$ N Aene Neelen $39104 Con Ce PBY SA$564 6$ BBenenee V-Tell $3965 M Oh Ce C epe$65 77 Lceenbe Ondee $2597140k Ce C Poe$75 72 NA B25 Beeber $4962 Cc ee NC 4059 65 MMeecde B-3d $4994 Cc ee 40 4$69 creep iei lueledees BIJOReEC CCI C ANT RANH Ne Seld Thc DeeleePiceeecb1ec eebee$e cc 400 Mece SOc Op 6134 Peec Aleceyceel Add 0% eel1 ecdee chipp no & en ete 0$A Cee & Mee Bleenchere 15% 125% lObyel Pie$eiel eeteleg $2$0 leeledee P6cc LiePcee lie ceeHee elene $100 el Becelee edd $100 - 1B3$7B BETBOIT AVE CLEVELAND OHIO 4402 ee.neeecceeelenloe heee e 515 P14BOO 100051-12161 961-3600 e.PCOOceeen gor photo unfinished fuselage model case want print Thank wonderful arti cles Model Aviation issue treat Jan P Koniarek Briarcliff Manor NY should like offer revised back ground McDonnell XF-85 Goblin described Mr Berliner page 103 October 1989 issue went work McDonnell Aircraft Co June 1947 37 years ex treme privilege know Mr JS McDon nell personally have pretty good sight what took place Shortly after WW lithe military consid ered trying reduce long escorted flights such aircraft P-51 drop tanks tired pilots etc proposed on-board fighter similar tried dur ing mid-1930s Remember Zeppe lins trapezed fighters As prac tice days late 40s early 50s competition among existing US aircraft companies McDonnell won Yes XF-85 hard fly So Harrier today No ever killed Goblin Harrier well development Goblin inflight fueling successfully developed eliminated need on-board fighters B-29s B-47s B-52s Launching Goblin mother ship never problem extreme turbulence beneath B-29 trying reengage trapeze harrowing accomplished recall other flight termination land case sand Goblin solid oak wing tips its designed landing gear Mr Berliners description designing Ferrari fit Buick glove compartment bit extreme Goblin fit bomb bay mother ship designed fit fetter some X planes could see wings sticking out side pilot did have sit cramped up small cockpit interminable time called upon could enter plane extended slipstream take off Incidentally slipstream helped engine starting Mr Berliner didnt use great number words describe appearance good bad cute ugly does feel fuselage should barrel-shaped tail too feathers however design criteria re Continued page 12 10 Model Aviation ND GIANTS FOR GIANT SCALE BUFFS D check enclosed D Charge credit card Charge II Mastercard Name DVisa Card # Street Exp date City State Zip Include postage handling US $150 Canadian foreign add 15% Inilnimum $3001 Make payment US funds Wisconsin residents add 5% sales tax 0110 DGA Designs SO DGA 00 DCA Designs 0 0 S Ill 01 CS oIf 0 0 5OiiarterMaster 1SPORT BIPE OUARTERSCALE PLANS Ouarter Master Sport Bipe5 $21 OMadta 35. 73Span.E-Z bcdld. Great Flyer.5Semi-tir Available.. PPO 0 DAVIS D-1I 505 Spar s5e Ouadra 35 power sintilar PPO C S Model K 117 Span 035 power PPO KINNER SPORTSTER 4-CYCLE PROJECTS S t 14VVAKRONFUNK 5 4 cycle. 54Can 60 dee s21 Fantastic Flyer ________0 DAVIS D1K* 803 Span. ppo si 5 45 4cycleorSirtilar.. Twa Inch scale sixth ecale 5 1933 KINNER SPORTSTER66 d Model K.7e Span. 61- 75.40y po SIID *sPhata reduced tram ax ia Scale clans. OTwa Inch scale Ott Slate Seale ________0 Mare DA P5CC catnina C PHOTO DOCUMENTATION PACKS availableUPS ROLLEDSHIPPED Sa4ttlCt51 Send nlOO Catalog C New Varh Sate Reeldente add 7* sales tax. bend ahsch S o Cr MO COOs AllOw 3weelxe tar abecktaclear III call Aerodynamics short fuselage very touchy size bomb bay dictated much design believe see Goblin bobbing zipping maneuvering about sky mov ie would call cute John W Rawlings St Charles MO ask readers remember criter ion used Don Berliner classify beauti frI ugly airplanes Efficiency air craft well intended purposes flilfilled nothing Pure simple whether shapes pleasing eye eye wouldn t let magazine staff cast votes did read previous Beauti ful Ugly articles Im sure agree Waco Taperwing Ryan STA P 51D T-38 Talon F-16 Falcon de serve classified works art werent mentioned day can spend hours drinking-in beautiful sexy Mustang lines Ditto F-16 However disagree Pilatus Turbo Porter Sure its no T-38 its ugly still keep old dogeared Amer ican Aircraft Modeler issue because stick-and-tissue Porter article just looks good sitting Fairchild-like land ing gear Also will agree experi ence plays role what consider pretty instance will always admire Parks biplanes PT-2 1 122s after hav ing privilege hitching ride front cockpit award-winning meticu lous restorations owned Wayne Ame lang Tullahoma TN Stan Jones Huntsville AL Wishes Blunt Prop Edges just finished reading article about prop safety October issue Like other RC fliers have share nicks bruises cuts props What cant understand prop manufacturers put razor sharp edges nylon glass props use nylon prop always sand down edges st case nylon prop know comes blunt edge Yoshioka brand wish other companies could follow example become safety coflscious Sasha Pave Woodland Hills CA Ken Cafler Remembered article Battle RC Frequen cies July 1989 issue pic ture page 60 identifies Ken Carter kneeling judge might have known Ken am enclosing death no tice indicating Ken died July 16 1989Continued page 156 12 Model Aviation JKaimbach PublISnhlig 1o PU Box 1512 WauKesha WI 53187 YES1 Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy 512951#12066 m mu mi 5I GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 8, 10, 12, 156
4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266778 136778 148778 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 84566/z7 945B6A/277 1045B6A7 106W8W 106EW 114677778 11SW II6EW 1167 124W 125W 1256 1356 1456 1556 164/2N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N 5N 8I 6778 SERIES 400C 866777 9777 W WIDE BLADE EW EXTRA WIDE N NARROW e rs tPne 0 ditor Beautiful & Ugly Planes greatly enjoyed Mr Berliners article October issue Model Aviation airplanes article caught eye othersthe highly modified An-2 biplane strange looking contraption actually has interesting history built about 15 years ago Poland flying labora tory Poles developing jetpowered agricultural biplane named Lala 1 has piston engine front jet engine back intake jet en gine can seen side just forward wings marked zebra stripes jet engine installed test effect jet blast chemicals dispersed under wings spite its unusual appearance successful test bed airplane evolved tests PZL M- 15 Belphegor jet-powered biplane jet-powered biplane world Quite few built Poland mid-1970s mostly export USSR The biplane configuration chosen provide large wing area max imum payload short wingspan tight turns required crop dusting About 10 years ago started building model Belphegor A-scale powered RK-40 Axiflo fan unit However never finished itbut havent given up yet am enclosing two photos Belphe 8 Model Aviation THE LEADER IN COM PETITION PROPELLERS tl NEW letters will carefully considered general Interest used Send Model Aviation 1810 Samuel Morse Dr Reston VA 22090 J ntinued page 10 17 Cc, iN4 Jeeny $37 $lON Mocqcio $6 $42 FeIcke 07 FIc $39- 10$ OH MocqeBeneb $55 70 $eyIe Gee-Bee $32 90 Oceec POl7Keydel $566$ Heoed Pele Bee $32- 99 NBIk Widoen P61 $69 60 Sepe~eeiee 56$ $24 71 Occo 00-3 047 $35 $9 Sepe necine S6B $35 95 Qeeg 003 047 $55 63CcHeek P-HE $42 $6 Keceke Teecee 13 $22 96Cc Heenk P60 054 64 Sled Sky-Ce01$ -74 Doolielee GB 11 $4$ 72 Cer02U 14 LOS$46 95 Menecoepe Spe, $26 10$ Ce 02014 LOS 056 *-0$ Hell Sp BcIldeg $42 60 Docqlec 14-2 Veil $24 107 Aeonee C-S SpI $25- 6$ Bkel Oclidog Fl $30 62 PIeeee4 Reec Ike $45 59 BeeeRoee MeLA $54 700ceee W-W Rec $35 107 Gece BeeccI FOP $047 E 63Cc Goehk 9110 $42 69 Liedherge NO211 $2$ 1 H4Cc Ceehk P110 $54-91 Lirdkeqe NO211 $39 46 DeHee Ceee Bee $24 96 WNWINee Bee 04$ Mclliqer $35 740 HelIde 50204 $55 Mclliqer $45 10$ PeiehPT19 17 $59. P-26A 9$ $26 60 Wece Tepee-Wine $36 P36A Fl $40- 90 Wece Tepe-Wieg $40 $2 Leek11Blcelre$4016Cebin$2675Wee6dLysondee$32 $30$49 4-AT $36 62 Sliecee 71W $B7 $1 B96 Bellenee Aiecie$40 1 S6,en 71W 5B7 02693 Leenieg C-2Aeph$69.i. 122 Sliecee 9/W 007 $3$5$ Gce J2-P Deek$39 59 Brielel Fl P2-B $207$ Gce J2-P Ocek$56 11$ $reeI Fl P2B $45 134 Leek Al Pepecee$40- 740eees Peee $451 63 leek Al Eepeeee 56 Ce Wehk P40 $24$3 Leek Ale Leprees$36 60 Veg Ce,eir P40 $3577 WWeee 121 BeAk54$ OOVegCeeejP4U $60630 Seelee EP7C1$45 7$ Leek LjghMg P-3$ 03$940 Seekeeek P70 1$57 56 BepSee-Bee Ann $2410$ S S 30 Aeph$49 74 BepSee-Bee $3960 Bee eq 00 Spe$36 70 Pipe J-3 Ceb $3990 Bee eq 100 Spe$49 106 Pipe J-3 Oem $39775 Neelhep Gen,ee$409$ Leek Hcdeen Beeb 03$96 Nelhep Gennene$75 30cc, P69 Helleet $2890 SlincA Ieee 31A$$5677 Beeleg B-17G Pe $3560 SlincA Leee 3/14$42103 Bee $17G Pe$ $551200 neA Leee 314003 68 Wed WkieIeeied $3270 Ceecel Ce OBYSA$42 6$ N Aene Neelen $39104 Con Ce PBY SA$564 6$ BBenenee V-Tell $3965 M Oh Ce C epe$65 77 Lceenbe Ondee $2597140k Ce C Poe$75 72 NA B25 Beeber $4962 Cc ee NC 4059 65 MMeecde B-3d $4994 Cc ee 40 4$69 creep iei lueledees BIJOReEC CCI C ANT RANH Ne Seld Thc DeeleePiceeecb1ec eebee$e cc 400 Mece SOc Op 6134 Peec Aleceyceel Add 0% eel1 ecdee chipp no & en ete 0$A Cee & Mee Bleenchere 15% 125% lObyel Pie$eiel eeteleg $2$0 leeledee P6cc LiePcee lie ceeHee elene $100 el Becelee edd $100 - 1B3$7B BETBOIT AVE CLEVELAND OHIO 4402 ee.neeecceeelenloe heee e 515 P14BOO 100051-12161 961-3600 e.PCOOceeen gor photo unfinished fuselage model case want print Thank wonderful arti cles Model Aviation issue treat Jan P Koniarek Briarcliff Manor NY should like offer revised back ground McDonnell XF-85 Goblin described Mr Berliner page 103 October 1989 issue went work McDonnell Aircraft Co June 1947 37 years ex treme privilege know Mr JS McDon nell personally have pretty good sight what took place Shortly after WW lithe military consid ered trying reduce long escorted flights such aircraft P-51 drop tanks tired pilots etc proposed on-board fighter similar tried dur ing mid-1930s Remember Zeppe lins trapezed fighters As prac tice days late 40s early 50s competition among existing US aircraft companies McDonnell won Yes XF-85 hard fly So Harrier today No ever killed Goblin Harrier well development Goblin inflight fueling successfully developed eliminated need on-board fighters B-29s B-47s B-52s Launching Goblin mother ship never problem extreme turbulence beneath B-29 trying reengage trapeze harrowing accomplished recall other flight termination land case sand Goblin solid oak wing tips its designed landing gear Mr Berliners description designing Ferrari fit Buick glove compartment bit extreme Goblin fit bomb bay mother ship designed fit fetter some X planes could see wings sticking out side pilot did have sit cramped up small cockpit interminable time called upon could enter plane extended slipstream take off Incidentally slipstream helped engine starting Mr Berliner didnt use great number words describe appearance good bad cute ugly does feel fuselage should barrel-shaped tail too feathers however design criteria re Continued page 12 10 Model Aviation ND GIANTS FOR GIANT SCALE BUFFS D check enclosed D Charge credit card Charge II Mastercard Name DVisa Card # Street Exp date City State Zip Include postage handling US $150 Canadian foreign add 15% Inilnimum $3001 Make payment US funds Wisconsin residents add 5% sales tax 0110 DGA Designs SO DGA 00 DCA Designs 0 0 S Ill 01 CS oIf 0 0 5OiiarterMaster 1SPORT BIPE OUARTERSCALE PLANS Ouarter Master Sport Bipe5 $21 OMadta 35. 73Span.E-Z bcdld. Great Flyer.5Semi-tir Available.. PPO 0 DAVIS D-1I 505 Spar s5e Ouadra 35 power sintilar PPO C S Model K 117 Span 035 power PPO KINNER SPORTSTER 4-CYCLE PROJECTS S t 14VVAKRONFUNK 5 4 cycle. 54Can 60 dee s21 Fantastic Flyer ________0 DAVIS D1K* 803 Span. ppo si 5 45 4cycleorSirtilar.. Twa Inch scale sixth ecale 5 1933 KINNER SPORTSTER66 d Model K.7e Span. 61- 75.40y po SIID *sPhata reduced tram ax ia Scale clans. OTwa Inch scale Ott Slate Seale ________0 Mare DA P5CC catnina C PHOTO DOCUMENTATION PACKS availableUPS ROLLEDSHIPPED Sa4ttlCt51 Send nlOO Catalog C New Varh Sate Reeldente add 7* sales tax. bend ahsch S o Cr MO COOs AllOw 3weelxe tar abecktaclear III call Aerodynamics short fuselage very touchy size bomb bay dictated much design believe see Goblin bobbing zipping maneuvering about sky mov ie would call cute John W Rawlings St Charles MO ask readers remember criter ion used Don Berliner classify beauti frI ugly airplanes Efficiency air craft well intended purposes flilfilled nothing Pure simple whether shapes pleasing eye eye wouldn t let magazine staff cast votes did read previous Beauti ful Ugly articles Im sure agree Waco Taperwing Ryan STA P 51D T-38 Talon F-16 Falcon de serve classified works art werent mentioned day can spend hours drinking-in beautiful sexy Mustang lines Ditto F-16 However disagree Pilatus Turbo Porter Sure its no T-38 its ugly still keep old dogeared Amer ican Aircraft Modeler issue because stick-and-tissue Porter article just looks good sitting Fairchild-like land ing gear Also will agree experi ence plays role what consider pretty instance will always admire Parks biplanes PT-2 1 122s after hav ing privilege hitching ride front cockpit award-winning meticu lous restorations owned Wayne Ame lang Tullahoma TN Stan Jones Huntsville AL Wishes Blunt Prop Edges just finished reading article about prop safety October issue Like other RC fliers have share nicks bruises cuts props What cant understand prop manufacturers put razor sharp edges nylon glass props use nylon prop always sand down edges st case nylon prop know comes blunt edge Yoshioka brand wish other companies could follow example become safety coflscious Sasha Pave Woodland Hills CA Ken Cafler Remembered article Battle RC Frequen cies July 1989 issue pic ture page 60 identifies Ken Carter kneeling judge might have known Ken am enclosing death no tice indicating Ken died July 16 1989Continued page 156 12 Model Aviation JKaimbach PublISnhlig 1o PU Box 1512 WauKesha WI 53187 YES1 Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy 512951#12066 m mu mi 5I GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 8, 10, 12, 156
4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266778 136778 148778 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 84566/z7 945B6A/277 1045B6A7 106W8W 106EW 114677778 11SW II6EW 1167 124W 125W 1256 1356 1456 1556 164/2N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N 5N 8I 6778 SERIES 400C 866777 9777 W WIDE BLADE EW EXTRA WIDE N NARROW e rs tPne 0 ditor Beautiful & Ugly Planes greatly enjoyed Mr Berliners article October issue Model Aviation airplanes article caught eye othersthe highly modified An-2 biplane strange looking contraption actually has interesting history built about 15 years ago Poland flying labora tory Poles developing jetpowered agricultural biplane named Lala 1 has piston engine front jet engine back intake jet en gine can seen side just forward wings marked zebra stripes jet engine installed test effect jet blast chemicals dispersed under wings spite its unusual appearance successful test bed airplane evolved tests PZL M- 15 Belphegor jet-powered biplane jet-powered biplane world Quite few built Poland mid-1970s mostly export USSR The biplane configuration chosen provide large wing area max imum payload short wingspan tight turns required crop dusting About 10 years ago started building model Belphegor A-scale powered RK-40 Axiflo fan unit However never finished itbut havent given up yet am enclosing two photos Belphe 8 Model Aviation THE LEADER IN COM PETITION PROPELLERS tl NEW letters will carefully considered general Interest used Send Model Aviation 1810 Samuel Morse Dr Reston VA 22090 J ntinued page 10 17 Cc, iN4 Jeeny $37 $lON Mocqcio $6 $42 FeIcke 07 FIc $39- 10$ OH MocqeBeneb $55 70 $eyIe Gee-Bee $32 90 Oceec POl7Keydel $566$ Heoed Pele Bee $32- 99 NBIk Widoen P61 $69 60 Sepe~eeiee 56$ $24 71 Occo 00-3 047 $35 $9 Sepe necine S6B $35 95 Qeeg 003 047 $55 63CcHeek P-HE $42 $6 Keceke Teecee 13 $22 96Cc Heenk P60 054 64 Sled Sky-Ce01$ -74 Doolielee GB 11 $4$ 72 Cer02U 14 LOS$46 95 Menecoepe Spe, $26 10$ Ce 02014 LOS 056 *-0$ Hell Sp BcIldeg $42 60 Docqlec 14-2 Veil $24 107 Aeonee C-S SpI $25- 6$ Bkel Oclidog Fl $30 62 PIeeee4 Reec Ike $45 59 BeeeRoee MeLA $54 700ceee W-W Rec $35 107 Gece BeeccI FOP $047 E 63Cc Goehk 9110 $42 69 Liedherge NO211 $2$ 1 H4Cc Ceehk P110 $54-91 Lirdkeqe NO211 $39 46 DeHee Ceee Bee $24 96 WNWINee Bee 04$ Mclliqer $35 740 HelIde 50204 $55 Mclliqer $45 10$ PeiehPT19 17 $59. P-26A 9$ $26 60 Wece Tepee-Wine $36 P36A Fl $40- 90 Wece Tepe-Wieg $40 $2 Leek11Blcelre$4016Cebin$2675Wee6dLysondee$32 $30$49 4-AT $36 62 Sliecee 71W $B7 $1 B96 Bellenee Aiecie$40 1 S6,en 71W 5B7 02693 Leenieg C-2Aeph$69.i. 122 Sliecee 9/W 007 $3$5$ Gce J2-P Deek$39 59 Brielel Fl P2-B $207$ Gce J2-P Ocek$56 11$ $reeI Fl P2B $45 134 Leek Al Pepecee$40- 740eees Peee $451 63 leek Al Eepeeee 56 Ce Wehk P40 $24$3 Leek Ale Leprees$36 60 Veg Ce,eir P40 $3577 WWeee 121 BeAk54$ OOVegCeeejP4U $60630 Seelee EP7C1$45 7$ Leek LjghMg P-3$ 03$940 Seekeeek P70 1$57 56 BepSee-Bee Ann $2410$ S S 30 Aeph$49 74 BepSee-Bee $3960 Bee eq 00 Spe$36 70 Pipe J-3 Ceb $3990 Bee eq 100 Spe$49 106 Pipe J-3 Oem $39775 Neelhep Gen,ee$409$ Leek Hcdeen Beeb 03$96 Nelhep Gennene$75 30cc, P69 Helleet $2890 SlincA Ieee 31A$$5677 Beeleg B-17G Pe $3560 SlincA Leee 3/14$42103 Bee $17G Pe$ $551200 neA Leee 314003 68 Wed WkieIeeied $3270 Ceecel Ce OBYSA$42 6$ N Aene Neelen $39104 Con Ce PBY SA$564 6$ BBenenee V-Tell $3965 M Oh Ce C epe$65 77 Lceenbe Ondee $2597140k Ce C Poe$75 72 NA B25 Beeber $4962 Cc ee NC 4059 65 MMeecde B-3d $4994 Cc ee 40 4$69 creep iei lueledees BIJOReEC CCI C ANT RANH Ne Seld Thc DeeleePiceeecb1ec eebee$e cc 400 Mece SOc Op 6134 Peec Aleceyceel Add 0% eel1 ecdee chipp no & en ete 0$A Cee & Mee Bleenchere 15% 125% lObyel Pie$eiel eeteleg $2$0 leeledee P6cc LiePcee lie ceeHee elene $100 el Becelee edd $100 - 1B3$7B BETBOIT AVE CLEVELAND OHIO 4402 ee.neeecceeelenloe heee e 515 P14BOO 100051-12161 961-3600 e.PCOOceeen gor photo unfinished fuselage model case want print Thank wonderful arti cles Model Aviation issue treat Jan P Koniarek Briarcliff Manor NY should like offer revised back ground McDonnell XF-85 Goblin described Mr Berliner page 103 October 1989 issue went work McDonnell Aircraft Co June 1947 37 years ex treme privilege know Mr JS McDon nell personally have pretty good sight what took place Shortly after WW lithe military consid ered trying reduce long escorted flights such aircraft P-51 drop tanks tired pilots etc proposed on-board fighter similar tried dur ing mid-1930s Remember Zeppe lins trapezed fighters As prac tice days late 40s early 50s competition among existing US aircraft companies McDonnell won Yes XF-85 hard fly So Harrier today No ever killed Goblin Harrier well development Goblin inflight fueling successfully developed eliminated need on-board fighters B-29s B-47s B-52s Launching Goblin mother ship never problem extreme turbulence beneath B-29 trying reengage trapeze harrowing accomplished recall other flight termination land case sand Goblin solid oak wing tips its designed landing gear Mr Berliners description designing Ferrari fit Buick glove compartment bit extreme Goblin fit bomb bay mother ship designed fit fetter some X planes could see wings sticking out side pilot did have sit cramped up small cockpit interminable time called upon could enter plane extended slipstream take off Incidentally slipstream helped engine starting Mr Berliner didnt use great number words describe appearance good bad cute ugly does feel fuselage should barrel-shaped tail too feathers however design criteria re Continued page 12 10 Model Aviation ND GIANTS FOR GIANT SCALE BUFFS D check enclosed D Charge credit card Charge II Mastercard Name DVisa Card # Street Exp date City State Zip Include postage handling US $150 Canadian foreign add 15% Inilnimum $3001 Make payment US funds Wisconsin residents add 5% sales tax 0110 DGA Designs SO DGA 00 DCA Designs 0 0 S Ill 01 CS oIf 0 0 5OiiarterMaster 1SPORT BIPE OUARTERSCALE PLANS Ouarter Master Sport Bipe5 $21 OMadta 35. 73Span.E-Z bcdld. Great Flyer.5Semi-tir Available.. PPO 0 DAVIS D-1I 505 Spar s5e Ouadra 35 power sintilar PPO C S Model K 117 Span 035 power PPO KINNER SPORTSTER 4-CYCLE PROJECTS S t 14VVAKRONFUNK 5 4 cycle. 54Can 60 dee s21 Fantastic Flyer ________0 DAVIS D1K* 803 Span. ppo si 5 45 4cycleorSirtilar.. Twa Inch scale sixth ecale 5 1933 KINNER SPORTSTER66 d Model K.7e Span. 61- 75.40y po SIID *sPhata reduced tram ax ia Scale clans. OTwa Inch scale Ott Slate Seale ________0 Mare DA P5CC catnina C PHOTO DOCUMENTATION PACKS availableUPS ROLLEDSHIPPED Sa4ttlCt51 Send nlOO Catalog C New Varh Sate Reeldente add 7* sales tax. bend ahsch S o Cr MO COOs AllOw 3weelxe tar abecktaclear III call Aerodynamics short fuselage very touchy size bomb bay dictated much design believe see Goblin bobbing zipping maneuvering about sky mov ie would call cute John W Rawlings St Charles MO ask readers remember criter ion used Don Berliner classify beauti frI ugly airplanes Efficiency air craft well intended purposes flilfilled nothing Pure simple whether shapes pleasing eye eye wouldn t let magazine staff cast votes did read previous Beauti ful Ugly articles Im sure agree Waco Taperwing Ryan STA P 51D T-38 Talon F-16 Falcon de serve classified works art werent mentioned day can spend hours drinking-in beautiful sexy Mustang lines Ditto F-16 However disagree Pilatus Turbo Porter Sure its no T-38 its ugly still keep old dogeared Amer ican Aircraft Modeler issue because stick-and-tissue Porter article just looks good sitting Fairchild-like land ing gear Also will agree experi ence plays role what consider pretty instance will always admire Parks biplanes PT-2 1 122s after hav ing privilege hitching ride front cockpit award-winning meticu lous restorations owned Wayne Ame lang Tullahoma TN Stan Jones Huntsville AL Wishes Blunt Prop Edges just finished reading article about prop safety October issue Like other RC fliers have share nicks bruises cuts props What cant understand prop manufacturers put razor sharp edges nylon glass props use nylon prop always sand down edges st case nylon prop know comes blunt edge Yoshioka brand wish other companies could follow example become safety coflscious Sasha Pave Woodland Hills CA Ken Cafler Remembered article Battle RC Frequen cies July 1989 issue pic ture page 60 identifies Ken Carter kneeling judge might have known Ken am enclosing death no tice indicating Ken died July 16 1989Continued page 156 12 Model Aviation JKaimbach PublISnhlig 1o PU Box 1512 WauKesha WI 53187 YES1 Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy 512951#12066 m mu mi 5I GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 8, 10, 12, 156
4 CYCLE SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266778 136778 148778 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020%INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 84566/z7 945B6A/277 1045B6A7 106W8W 106EW 114677778 11SW II6EW 1167 124W 125W 1256 1356 1456 1556 164/2N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N 5N 8I 6778 SERIES 400C 866777 9777 W WIDE BLADE EW EXTRA WIDE N NARROW e rs tPne 0 ditor Beautiful & Ugly Planes greatly enjoyed Mr Berliners article October issue Model Aviation airplanes article caught eye othersthe highly modified An-2 biplane strange looking contraption actually has interesting history built about 15 years ago Poland flying labora tory Poles developing jetpowered agricultural biplane named Lala 1 has piston engine front jet engine back intake jet en gine can seen side just forward wings marked zebra stripes jet engine installed test effect jet blast chemicals dispersed under wings spite its unusual appearance successful test bed airplane evolved tests PZL M- 15 Belphegor jet-powered biplane jet-powered biplane world Quite few built Poland mid-1970s mostly export USSR The biplane configuration chosen provide large wing area max imum payload short wingspan tight turns required crop dusting About 10 years ago started building model Belphegor A-scale powered RK-40 Axiflo fan unit However never finished itbut havent given up yet am enclosing two photos Belphe 8 Model Aviation THE LEADER IN COM PETITION PROPELLERS tl NEW letters will carefully considered general Interest used Send Model Aviation 1810 Samuel Morse Dr Reston VA 22090 J ntinued page 10 17 Cc, iN4 Jeeny $37 $lON Mocqcio $6 $42 FeIcke 07 FIc $39- 10$ OH MocqeBeneb $55 70 $eyIe Gee-Bee $32 90 Oceec POl7Keydel $566$ Heoed Pele Bee $32- 99 NBIk Widoen P61 $69 60 Sepe~eeiee 56$ $24 71 Occo 00-3 047 $35 $9 Sepe necine S6B $35 95 Qeeg 003 047 $55 63CcHeek P-HE $42 $6 Keceke Teecee 13 $22 96Cc Heenk P60 054 64 Sled Sky-Ce01$ -74 Doolielee GB 11 $4$ 72 Cer02U 14 LOS$46 95 Menecoepe Spe, $26 10$ Ce 02014 LOS 056 *-0$ Hell Sp BcIldeg $42 60 Docqlec 14-2 Veil $24 107 Aeonee C-S SpI $25- 6$ Bkel Oclidog Fl $30 62 PIeeee4 Reec Ike $45 59 BeeeRoee MeLA $54 700ceee W-W Rec $35 107 Gece BeeccI FOP $047 E 63Cc Goehk 9110 $42 69 Liedherge NO211 $2$ 1 H4Cc Ceehk P110 $54-91 Lirdkeqe NO211 $39 46 DeHee Ceee Bee $24 96 WNWINee Bee 04$ Mclliqer $35 740 HelIde 50204 $55 Mclliqer $45 10$ PeiehPT19 17 $59. P-26A 9$ $26 60 Wece Tepee-Wine $36 P36A Fl $40- 90 Wece Tepe-Wieg $40 $2 Leek11Blcelre$4016Cebin$2675Wee6dLysondee$32 $30$49 4-AT $36 62 Sliecee 71W $B7 $1 B96 Bellenee Aiecie$40 1 S6,en 71W 5B7 02693 Leenieg C-2Aeph$69.i. 122 Sliecee 9/W 007 $3$5$ Gce J2-P Deek$39 59 Brielel Fl P2-B $207$ Gce J2-P Ocek$56 11$ $reeI Fl P2B $45 134 Leek Al Pepecee$40- 740eees Peee $451 63 leek Al Eepeeee 56 Ce Wehk P40 $24$3 Leek Ale Leprees$36 60 Veg Ce,eir P40 $3577 WWeee 121 BeAk54$ OOVegCeeejP4U $60630 Seelee EP7C1$45 7$ Leek LjghMg P-3$ 03$940 Seekeeek P70 1$57 56 BepSee-Bee Ann $2410$ S S 30 Aeph$49 74 BepSee-Bee $3960 Bee eq 00 Spe$36 70 Pipe J-3 Ceb $3990 Bee eq 100 Spe$49 106 Pipe J-3 Oem $39775 Neelhep Gen,ee$409$ Leek Hcdeen Beeb 03$96 Nelhep Gennene$75 30cc, P69 Helleet $2890 SlincA Ieee 31A$$5677 Beeleg B-17G Pe $3560 SlincA Leee 3/14$42103 Bee $17G Pe$ $551200 neA Leee 314003 68 Wed WkieIeeied $3270 Ceecel Ce OBYSA$42 6$ N Aene Neelen $39104 Con Ce PBY SA$564 6$ BBenenee V-Tell $3965 M Oh Ce C epe$65 77 Lceenbe Ondee $2597140k Ce C Poe$75 72 NA B25 Beeber $4962 Cc ee NC 4059 65 MMeecde B-3d $4994 Cc ee 40 4$69 creep iei lueledees BIJOReEC CCI C ANT RANH Ne Seld Thc DeeleePiceeecb1ec eebee$e cc 400 Mece SOc Op 6134 Peec Aleceyceel Add 0% eel1 ecdee chipp no & en ete 0$A Cee & Mee Bleenchere 15% 125% lObyel Pie$eiel eeteleg $2$0 leeledee P6cc LiePcee lie ceeHee elene $100 el Becelee edd $100 - 1B3$7B BETBOIT AVE CLEVELAND OHIO 4402 ee.neeecceeelenloe heee e 515 P14BOO 100051-12161 961-3600 e.PCOOceeen gor photo unfinished fuselage model case want print Thank wonderful arti cles Model Aviation issue treat Jan P Koniarek Briarcliff Manor NY should like offer revised back ground McDonnell XF-85 Goblin described Mr Berliner page 103 October 1989 issue went work McDonnell Aircraft Co June 1947 37 years ex treme privilege know Mr JS McDon nell personally have pretty good sight what took place Shortly after WW lithe military consid ered trying reduce long escorted flights such aircraft P-51 drop tanks tired pilots etc proposed on-board fighter similar tried dur ing mid-1930s Remember Zeppe lins trapezed fighters As prac tice days late 40s early 50s competition among existing US aircraft companies McDonnell won Yes XF-85 hard fly So Harrier today No ever killed Goblin Harrier well development Goblin inflight fueling successfully developed eliminated need on-board fighters B-29s B-47s B-52s Launching Goblin mother ship never problem extreme turbulence beneath B-29 trying reengage trapeze harrowing accomplished recall other flight termination land case sand Goblin solid oak wing tips its designed landing gear Mr Berliners description designing Ferrari fit Buick glove compartment bit extreme Goblin fit bomb bay mother ship designed fit fetter some X planes could see wings sticking out side pilot did have sit cramped up small cockpit interminable time called upon could enter plane extended slipstream take off Incidentally slipstream helped engine starting Mr Berliner didnt use great number words describe appearance good bad cute ugly does feel fuselage should barrel-shaped tail too feathers however design criteria re Continued page 12 10 Model Aviation ND GIANTS FOR GIANT SCALE BUFFS D check enclosed D Charge credit card Charge II Mastercard Name DVisa Card # Street Exp date City State Zip Include postage handling US $150 Canadian foreign add 15% Inilnimum $3001 Make payment US funds Wisconsin residents add 5% sales tax 0110 DGA Designs SO DGA 00 DCA Designs 0 0 S Ill 01 CS oIf 0 0 5OiiarterMaster 1SPORT BIPE OUARTERSCALE PLANS Ouarter Master Sport Bipe5 $21 OMadta 35. 73Span.E-Z bcdld. Great Flyer.5Semi-tir Available.. PPO 0 DAVIS D-1I 505 Spar s5e Ouadra 35 power sintilar PPO C S Model K 117 Span 035 power PPO KINNER SPORTSTER 4-CYCLE PROJECTS S t 14VVAKRONFUNK 5 4 cycle. 54Can 60 dee s21 Fantastic Flyer ________0 DAVIS D1K* 803 Span. ppo si 5 45 4cycleorSirtilar.. Twa Inch scale sixth ecale 5 1933 KINNER SPORTSTER66 d Model K.7e Span. 61- 75.40y po SIID *sPhata reduced tram ax ia Scale clans. OTwa Inch scale Ott Slate Seale ________0 Mare DA P5CC catnina C PHOTO DOCUMENTATION PACKS availableUPS ROLLEDSHIPPED Sa4ttlCt51 Send nlOO Catalog C New Varh Sate Reeldente add 7* sales tax. bend ahsch S o Cr MO COOs AllOw 3weelxe tar abecktaclear III call Aerodynamics short fuselage very touchy size bomb bay dictated much design believe see Goblin bobbing zipping maneuvering about sky mov ie would call cute John W Rawlings St Charles MO ask readers remember criter ion used Don Berliner classify beauti frI ugly airplanes Efficiency air craft well intended purposes flilfilled nothing Pure simple whether shapes pleasing eye eye wouldn t let magazine staff cast votes did read previous Beauti ful Ugly articles Im sure agree Waco Taperwing Ryan STA P 51D T-38 Talon F-16 Falcon de serve classified works art werent mentioned day can spend hours drinking-in beautiful sexy Mustang lines Ditto F-16 However disagree Pilatus Turbo Porter Sure its no T-38 its ugly still keep old dogeared Amer ican Aircraft Modeler issue because stick-and-tissue Porter article just looks good sitting Fairchild-like land ing gear Also will agree experi ence plays role what consider pretty instance will always admire Parks biplanes PT-2 1 122s after hav ing privilege hitching ride front cockpit award-winning meticu lous restorations owned Wayne Ame lang Tullahoma TN Stan Jones Huntsville AL Wishes Blunt Prop Edges just finished reading article about prop safety October issue Like other RC fliers have share nicks bruises cuts props What cant understand prop manufacturers put razor sharp edges nylon glass props use nylon prop always sand down edges st case nylon prop know comes blunt edge Yoshioka brand wish other companies could follow example become safety coflscious Sasha Pave Woodland Hills CA Ken Cafler Remembered article Battle RC Frequen cies July 1989 issue pic ture page 60 identifies Ken Carter kneeling judge might have known Ken am enclosing death no tice indicating Ken died July 16 1989Continued page 156 12 Model Aviation JKaimbach PublISnhlig 1o PU Box 1512 WauKesha WI 53187 YES1 Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy 512951#12066 m mu mi 5I GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation