Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. 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S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. 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January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. PtoctorEhideeksrTeol 2 Hra.S1995 20-93 NW Scaleimatese ttumwa Mus ink Seaplanes Garter Facility non Museum Houston 2Hrn.S1996 #19 3TopGus InvitatlAvisliwltd lzzo91 Acm Fair Trostdale Bametormero Scale Mus Flight2 Hrn.S1995 iS- 92 0SSA Las Vegas w/Jim Appleby & Sheeter Caitoon 92 NW Model Eapo2 Hrs.$19% #17- 92 Scalemaster Champs Lone Star Moo Air Moo. IJSSAlatama2 Hrn.519U #18 WWI Aircraft Gunteroville AL aval Air Muoosm Permicob FL2 Hre.S19g5 92 World Scale Clmnws foAl Shootout W Intl Sculemuders2 Hrn.S1996 #14 92 NW Seaplane Champs on Scale Aviation Australia2 Ht.S19g5 #13 92 Top Gwr looltationat oledo Model taps s Air Museum2 Hrn.$1995 #12-91 Scalemootero Lao Vegas 91 QSJSA Las Vegao 2 Hrn.$1995 Special Ed Ut. let AmeS Ealecpdsea Albatros DVA Brief Constr. Ernie & Rods InatalLA Teat Rights-i Ha. S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. Plain Weave 25yds mm $135/yd 316 oz. 50 w Satin Weave 25 yds mm S4W/yd D U Minimum order 1 yd VISA-MASTERCARD FAST SERVICEI ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog March 1994 81 AADAPTOR THROW AWAY YOUR COLLETS CHUCK & U CH USE OUR ADAPTOR & KEYLESS CHUCK IOTOBSE CAP ON ALL DREM R TOOLS INCLUDING 750 MINIMIIE & EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULl REM NO 501 ADAPTORKEYLESSCHUCKS1895 050 395 00 NOT NEED AISAPIOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR NAROESED GROUFI & POtJSNED STEEL USED FOR CullidO PIAS11C WOOD SOFT METALS tEXAN PLEOGIASS & ETC AVAILABLE 14 ese ole 012014 ste oto V OIJTSNE DIAMETER $6 $875 EA OUR020023025 028 O32THC1NESS N0502 R NO 503PXO14X1I4SAWSO00 OMY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL BRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1112AB2100 3ABS150 SAWS AND CUT-OFF BLRDES OBLY WORE WITH OUR ARBOR NO NEED FOR FUNT OR MATCHES MICRO~y JUST PRESS THE PIEZO SELF-STARTING SELFCWIBUTTON FOR MICRO SIZE ADJUSTABLE EIFLAI4E THAT BURNS AT 237G FOR UP TC STARTINGi3 HOURS OPERATES ON STANDARD UGHTER BUTANE AND IS TO RCHREFILLABLE TANK FITS COMFORTABLY IN THE PALM OF YOUR HAND AND IS MillS .MADE OF HIGH IMPACT RUBBER WHICH Blow ToRchALLOWS FOR SAFE NON-SLIP GRIP twill RI ORN $3500 SUPPLIED WITH CAN OP BUTANE uIanB5oSB00JU EASTERN TOOL&SUPPLYCOCOOAIIo$7Se 149 GRANOST NY 10013 212-WI-SRI CATALOG FREE WITH ORDERFAIL21-WI-ION FREE Fact Kit Call 1-800-345-5342 Ask Operator MA Letters Continued page 81 three flights needed before entering observer commented climbs authority Innovations included extra-long rubber motor stops full row knots left CG wont upset glide takes extra weight unused rubber return gears Gears would located rear wing shaft aft maintain correct CG location shorter tail moment arm would result reduce performance shorter fuselage uses less cross section penalty longer lengths shorter motor length also concentrates inertia heavy mass nearer CG improved stability slender top triangular body makes ideal location wing stabilizer minimum obstruction maximum 202 square inches allowed fuselage fin profile very unusual provide incredible lateral stability Glide circles concentric never flew far other models round never reached bean field wing placed two degrees negative centerline body works well FiB designs thrust line almost parallel wing chord glide nose high flight attitude combined flat-bottom fuselage believed make flying surface too could improve glide duration Aerodynamics have stated adds drag am convinced model named Pace Shuttle Jack Phelps SAM 56 club meeting profile resembled Space Shuttle wing Pacemaker hence name Pace Shuttle strongly urge Moffett rules switch back original rule larger fuselage cross section L2/100 reduces performance slightly makes category interesting fun Models can have character have larger fuselage work designing new model Just look variations old Wakefield designs Korda Clodhopper California Champ Hi-Ho Gypsy Linns Kansas winner etc Note boring designs P-30 Coupe Wakefield least casual observer look alikeWhy preserve little great Moffett tradition Modification existing design would require addition simple fairing minimal drop performance should very popular event meets around country Jim Bennett congratulated making category reality again Les DeWitt Wichita Kansas Tech Debate Continues. January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. PtoctorEhideeksrTeol 2 Hra.S1995 20-93 NW Scaleimatese ttumwa Mus ink Seaplanes Garter Facility non Museum Houston 2Hrn.S1996 #19 3TopGus InvitatlAvisliwltd lzzo91 Acm Fair Trostdale Bametormero Scale Mus Flight2 Hrn.S1995 iS- 92 0SSA Las Vegas w/Jim Appleby & Sheeter Caitoon 92 NW Model Eapo2 Hrs.$19% #17- 92 Scalemaster Champs Lone Star Moo Air Moo. IJSSAlatama2 Hrn.519U #18 WWI Aircraft Gunteroville AL aval Air Muoosm Permicob FL2 Hre.S19g5 92 World Scale Clmnws foAl Shootout W Intl Sculemuders2 Hrn.S1996 #14 92 NW Seaplane Champs on Scale Aviation Australia2 Ht.S19g5 #13 92 Top Gwr looltationat oledo Model taps s Air Museum2 Hrn.$1995 #12-91 Scalemootero Lao Vegas 91 QSJSA Las Vegao 2 Hrn.$1995 Special Ed Ut. let AmeS Ealecpdsea Albatros DVA Brief Constr. Ernie & Rods InatalLA Teat Rights-i Ha. S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. Plain Weave 25yds mm $135/yd 316 oz. 50 w Satin Weave 25 yds mm S4W/yd D U Minimum order 1 yd VISA-MASTERCARD FAST SERVICEI ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog March 1994 81 AADAPTOR THROW AWAY YOUR COLLETS CHUCK & U CH USE OUR ADAPTOR & KEYLESS CHUCK IOTOBSE CAP ON ALL DREM R TOOLS INCLUDING 750 MINIMIIE & EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULl REM NO 501 ADAPTORKEYLESSCHUCKS1895 050 395 00 NOT NEED AISAPIOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR NAROESED GROUFI & POtJSNED STEEL USED FOR CullidO PIAS11C WOOD SOFT METALS tEXAN PLEOGIASS & ETC AVAILABLE 14 ese ole 012014 ste oto V OIJTSNE DIAMETER $6 $875 EA OUR020023025 028 O32THC1NESS N0502 R NO 503PXO14X1I4SAWSO00 OMY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL BRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1112AB2100 3ABS150 SAWS AND CUT-OFF BLRDES OBLY WORE WITH OUR ARBOR NO NEED FOR FUNT OR MATCHES MICRO~y JUST PRESS THE PIEZO SELF-STARTING SELFCWIBUTTON FOR MICRO SIZE ADJUSTABLE EIFLAI4E THAT BURNS AT 237G FOR UP TC STARTINGi3 HOURS OPERATES ON STANDARD UGHTER BUTANE AND IS TO RCHREFILLABLE TANK FITS COMFORTABLY IN THE PALM OF YOUR HAND AND IS MillS .MADE OF HIGH IMPACT RUBBER WHICH Blow ToRchALLOWS FOR SAFE NON-SLIP GRIP twill RI ORN $3500 SUPPLIED WITH CAN OP BUTANE uIanB5oSB00JU EASTERN TOOL&SUPPLYCOCOOAIIo$7Se 149 GRANOST NY 10013 212-WI-SRI CATALOG FREE WITH ORDERFAIL21-WI-ION FREE Fact Kit Call 1-800-345-5342 Ask Operator MA Letters Continued page 81 three flights needed before entering observer commented climbs authority Innovations included extra-long rubber motor stops full row knots left CG wont upset glide takes extra weight unused rubber return gears Gears would located rear wing shaft aft maintain correct CG location shorter tail moment arm would result reduce performance shorter fuselage uses less cross section penalty longer lengths shorter motor length also concentrates inertia heavy mass nearer CG improved stability slender top triangular body makes ideal location wing stabilizer minimum obstruction maximum 202 square inches allowed fuselage fin profile very unusual provide incredible lateral stability Glide circles concentric never flew far other models round never reached bean field wing placed two degrees negative centerline body works well FiB designs thrust line almost parallel wing chord glide nose high flight attitude combined flat-bottom fuselage believed make flying surface too could improve glide duration Aerodynamics have stated adds drag am convinced model named Pace Shuttle Jack Phelps SAM 56 club meeting profile resembled Space Shuttle wing Pacemaker hence name Pace Shuttle strongly urge Moffett rules switch back original rule larger fuselage cross section L2/100 reduces performance slightly makes category interesting fun Models can have character have larger fuselage work designing new model Just look variations old Wakefield designs Korda Clodhopper California Champ Hi-Ho Gypsy Linns Kansas winner etc Note boring designs P-30 Coupe Wakefield least casual observer look alikeWhy preserve little great Moffett tradition Modification existing design would require addition simple fairing minimal drop performance should very popular event meets around country Jim Bennett congratulated making category reality again Les DeWitt Wichita Kansas Tech Debate Continues. January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. PtoctorEhideeksrTeol 2 Hra.S1995 20-93 NW Scaleimatese ttumwa Mus ink Seaplanes Garter Facility non Museum Houston 2Hrn.S1996 #19 3TopGus InvitatlAvisliwltd lzzo91 Acm Fair Trostdale Bametormero Scale Mus Flight2 Hrn.S1995 iS- 92 0SSA Las Vegas w/Jim Appleby & Sheeter Caitoon 92 NW Model Eapo2 Hrs.$19% #17- 92 Scalemaster Champs Lone Star Moo Air Moo. IJSSAlatama2 Hrn.519U #18 WWI Aircraft Gunteroville AL aval Air Muoosm Permicob FL2 Hre.S19g5 92 World Scale Clmnws foAl Shootout W Intl Sculemuders2 Hrn.S1996 #14 92 NW Seaplane Champs on Scale Aviation Australia2 Ht.S19g5 #13 92 Top Gwr looltationat oledo Model taps s Air Museum2 Hrn.$1995 #12-91 Scalemootero Lao Vegas 91 QSJSA Las Vegao 2 Hrn.$1995 Special Ed Ut. let AmeS Ealecpdsea Albatros DVA Brief Constr. Ernie & Rods InatalLA Teat Rights-i Ha. S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. Plain Weave 25yds mm $135/yd 316 oz. 50 w Satin Weave 25 yds mm S4W/yd D U Minimum order 1 yd VISA-MASTERCARD FAST SERVICEI ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog March 1994 81 AADAPTOR THROW AWAY YOUR COLLETS CHUCK & U CH USE OUR ADAPTOR & KEYLESS CHUCK IOTOBSE CAP ON ALL DREM R TOOLS INCLUDING 750 MINIMIIE & EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULl REM NO 501 ADAPTORKEYLESSCHUCKS1895 050 395 00 NOT NEED AISAPIOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR NAROESED GROUFI & POtJSNED STEEL USED FOR CullidO PIAS11C WOOD SOFT METALS tEXAN PLEOGIASS & ETC AVAILABLE 14 ese ole 012014 ste oto V OIJTSNE DIAMETER $6 $875 EA OUR020023025 028 O32THC1NESS N0502 R NO 503PXO14X1I4SAWSO00 OMY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL BRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1112AB2100 3ABS150 SAWS AND CUT-OFF BLRDES OBLY WORE WITH OUR ARBOR NO NEED FOR FUNT OR MATCHES MICRO~y JUST PRESS THE PIEZO SELF-STARTING SELFCWIBUTTON FOR MICRO SIZE ADJUSTABLE EIFLAI4E THAT BURNS AT 237G FOR UP TC STARTINGi3 HOURS OPERATES ON STANDARD UGHTER BUTANE AND IS TO RCHREFILLABLE TANK FITS COMFORTABLY IN THE PALM OF YOUR HAND AND IS MillS .MADE OF HIGH IMPACT RUBBER WHICH Blow ToRchALLOWS FOR SAFE NON-SLIP GRIP twill RI ORN $3500 SUPPLIED WITH CAN OP BUTANE uIanB5oSB00JU EASTERN TOOL&SUPPLYCOCOOAIIo$7Se 149 GRANOST NY 10013 212-WI-SRI CATALOG FREE WITH ORDERFAIL21-WI-ION FREE Fact Kit Call 1-800-345-5342 Ask Operator MA Letters Continued page 81 three flights needed before entering observer commented climbs authority Innovations included extra-long rubber motor stops full row knots left CG wont upset glide takes extra weight unused rubber return gears Gears would located rear wing shaft aft maintain correct CG location shorter tail moment arm would result reduce performance shorter fuselage uses less cross section penalty longer lengths shorter motor length also concentrates inertia heavy mass nearer CG improved stability slender top triangular body makes ideal location wing stabilizer minimum obstruction maximum 202 square inches allowed fuselage fin profile very unusual provide incredible lateral stability Glide circles concentric never flew far other models round never reached bean field wing placed two degrees negative centerline body works well FiB designs thrust line almost parallel wing chord glide nose high flight attitude combined flat-bottom fuselage believed make flying surface too could improve glide duration Aerodynamics have stated adds drag am convinced model named Pace Shuttle Jack Phelps SAM 56 club meeting profile resembled Space Shuttle wing Pacemaker hence name Pace Shuttle strongly urge Moffett rules switch back original rule larger fuselage cross section L2/100 reduces performance slightly makes category interesting fun Models can have character have larger fuselage work designing new model Just look variations old Wakefield designs Korda Clodhopper California Champ Hi-Ho Gypsy Linns Kansas winner etc Note boring designs P-30 Coupe Wakefield least casual observer look alikeWhy preserve little great Moffett tradition Modification existing design would require addition simple fairing minimal drop performance should very popular event meets around country Jim Bennett congratulated making category reality again Les DeWitt Wichita Kansas Tech Debate Continues. January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. PtoctorEhideeksrTeol 2 Hra.S1995 20-93 NW Scaleimatese ttumwa Mus ink Seaplanes Garter Facility non Museum Houston 2Hrn.S1996 #19 3TopGus InvitatlAvisliwltd lzzo91 Acm Fair Trostdale Bametormero Scale Mus Flight2 Hrn.S1995 iS- 92 0SSA Las Vegas w/Jim Appleby & Sheeter Caitoon 92 NW Model Eapo2 Hrs.$19% #17- 92 Scalemaster Champs Lone Star Moo Air Moo. IJSSAlatama2 Hrn.519U #18 WWI Aircraft Gunteroville AL aval Air Muoosm Permicob FL2 Hre.S19g5 92 World Scale Clmnws foAl Shootout W Intl Sculemuders2 Hrn.S1996 #14 92 NW Seaplane Champs on Scale Aviation Australia2 Ht.S19g5 #13 92 Top Gwr looltationat oledo Model taps s Air Museum2 Hrn.$1995 #12-91 Scalemootero Lao Vegas 91 QSJSA Las Vegao 2 Hrn.$1995 Special Ed Ut. let AmeS Ealecpdsea Albatros DVA Brief Constr. Ernie & Rods InatalLA Teat Rights-i Ha. S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. Plain Weave 25yds mm $135/yd 316 oz. 50 w Satin Weave 25 yds mm S4W/yd D U Minimum order 1 yd VISA-MASTERCARD FAST SERVICEI ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog March 1994 81 AADAPTOR THROW AWAY YOUR COLLETS CHUCK & U CH USE OUR ADAPTOR & KEYLESS CHUCK IOTOBSE CAP ON ALL DREM R TOOLS INCLUDING 750 MINIMIIE & EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULl REM NO 501 ADAPTORKEYLESSCHUCKS1895 050 395 00 NOT NEED AISAPIOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR NAROESED GROUFI & POtJSNED STEEL USED FOR CullidO PIAS11C WOOD SOFT METALS tEXAN PLEOGIASS & ETC AVAILABLE 14 ese ole 012014 ste oto V OIJTSNE DIAMETER $6 $875 EA OUR020023025 028 O32THC1NESS N0502 R NO 503PXO14X1I4SAWSO00 OMY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL BRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1112AB2100 3ABS150 SAWS AND CUT-OFF BLRDES OBLY WORE WITH OUR ARBOR NO NEED FOR FUNT OR MATCHES MICRO~y JUST PRESS THE PIEZO SELF-STARTING SELFCWIBUTTON FOR MICRO SIZE ADJUSTABLE EIFLAI4E THAT BURNS AT 237G FOR UP TC STARTINGi3 HOURS OPERATES ON STANDARD UGHTER BUTANE AND IS TO RCHREFILLABLE TANK FITS COMFORTABLY IN THE PALM OF YOUR HAND AND IS MillS .MADE OF HIGH IMPACT RUBBER WHICH Blow ToRchALLOWS FOR SAFE NON-SLIP GRIP twill RI ORN $3500 SUPPLIED WITH CAN OP BUTANE uIanB5oSB00JU EASTERN TOOL&SUPPLYCOCOOAIIo$7Se 149 GRANOST NY 10013 212-WI-SRI CATALOG FREE WITH ORDERFAIL21-WI-ION FREE Fact Kit Call 1-800-345-5342 Ask Operator MA Letters Continued page 81 three flights needed before entering observer commented climbs authority Innovations included extra-long rubber motor stops full row knots left CG wont upset glide takes extra weight unused rubber return gears Gears would located rear wing shaft aft maintain correct CG location shorter tail moment arm would result reduce performance shorter fuselage uses less cross section penalty longer lengths shorter motor length also concentrates inertia heavy mass nearer CG improved stability slender top triangular body makes ideal location wing stabilizer minimum obstruction maximum 202 square inches allowed fuselage fin profile very unusual provide incredible lateral stability Glide circles concentric never flew far other models round never reached bean field wing placed two degrees negative centerline body works well FiB designs thrust line almost parallel wing chord glide nose high flight attitude combined flat-bottom fuselage believed make flying surface too could improve glide duration Aerodynamics have stated adds drag am convinced model named Pace Shuttle Jack Phelps SAM 56 club meeting profile resembled Space Shuttle wing Pacemaker hence name Pace Shuttle strongly urge Moffett rules switch back original rule larger fuselage cross section L2/100 reduces performance slightly makes category interesting fun Models can have character have larger fuselage work designing new model Just look variations old Wakefield designs Korda Clodhopper California Champ Hi-Ho Gypsy Linns Kansas winner etc Note boring designs P-30 Coupe Wakefield least casual observer look alikeWhy preserve little great Moffett tradition Modification existing design would require addition simple fairing minimal drop performance should very popular event meets around country Jim Bennett congratulated making category reality again Les DeWitt Wichita Kansas Tech Debate Continues. January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. PtoctorEhideeksrTeol 2 Hra.S1995 20-93 NW Scaleimatese ttumwa Mus ink Seaplanes Garter Facility non Museum Houston 2Hrn.S1996 #19 3TopGus InvitatlAvisliwltd lzzo91 Acm Fair Trostdale Bametormero Scale Mus Flight2 Hrn.S1995 iS- 92 0SSA Las Vegas w/Jim Appleby & Sheeter Caitoon 92 NW Model Eapo2 Hrs.$19% #17- 92 Scalemaster Champs Lone Star Moo Air Moo. IJSSAlatama2 Hrn.519U #18 WWI Aircraft Gunteroville AL aval Air Muoosm Permicob FL2 Hre.S19g5 92 World Scale Clmnws foAl Shootout W Intl Sculemuders2 Hrn.S1996 #14 92 NW Seaplane Champs on Scale Aviation Australia2 Ht.S19g5 #13 92 Top Gwr looltationat oledo Model taps s Air Museum2 Hrn.$1995 #12-91 Scalemootero Lao Vegas 91 QSJSA Las Vegao 2 Hrn.$1995 Special Ed Ut. let AmeS Ealecpdsea Albatros DVA Brief Constr. Ernie & Rods InatalLA Teat Rights-i Ha. S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. Plain Weave 25yds mm $135/yd 316 oz. 50 w Satin Weave 25 yds mm S4W/yd D U Minimum order 1 yd VISA-MASTERCARD FAST SERVICEI ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog March 1994 81 AADAPTOR THROW AWAY YOUR COLLETS CHUCK & U CH USE OUR ADAPTOR & KEYLESS CHUCK IOTOBSE CAP ON ALL DREM R TOOLS INCLUDING 750 MINIMIIE & EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULl REM NO 501 ADAPTORKEYLESSCHUCKS1895 050 395 00 NOT NEED AISAPIOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR NAROESED GROUFI & POtJSNED STEEL USED FOR CullidO PIAS11C WOOD SOFT METALS tEXAN PLEOGIASS & ETC AVAILABLE 14 ese ole 012014 ste oto V OIJTSNE DIAMETER $6 $875 EA OUR020023025 028 O32THC1NESS N0502 R NO 503PXO14X1I4SAWSO00 OMY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL BRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1112AB2100 3ABS150 SAWS AND CUT-OFF BLRDES OBLY WORE WITH OUR ARBOR NO NEED FOR FUNT OR MATCHES MICRO~y JUST PRESS THE PIEZO SELF-STARTING SELFCWIBUTTON FOR MICRO SIZE ADJUSTABLE EIFLAI4E THAT BURNS AT 237G FOR UP TC STARTINGi3 HOURS OPERATES ON STANDARD UGHTER BUTANE AND IS TO RCHREFILLABLE TANK FITS COMFORTABLY IN THE PALM OF YOUR HAND AND IS MillS .MADE OF HIGH IMPACT RUBBER WHICH Blow ToRchALLOWS FOR SAFE NON-SLIP GRIP twill RI ORN $3500 SUPPLIED WITH CAN OP BUTANE uIanB5oSB00JU EASTERN TOOL&SUPPLYCOCOOAIIo$7Se 149 GRANOST NY 10013 212-WI-SRI CATALOG FREE WITH ORDERFAIL21-WI-ION FREE Fact Kit Call 1-800-345-5342 Ask Operator MA Letters Continued page 81 three flights needed before entering observer commented climbs authority Innovations included extra-long rubber motor stops full row knots left CG wont upset glide takes extra weight unused rubber return gears Gears would located rear wing shaft aft maintain correct CG location shorter tail moment arm would result reduce performance shorter fuselage uses less cross section penalty longer lengths shorter motor length also concentrates inertia heavy mass nearer CG improved stability slender top triangular body makes ideal location wing stabilizer minimum obstruction maximum 202 square inches allowed fuselage fin profile very unusual provide incredible lateral stability Glide circles concentric never flew far other models round never reached bean field wing placed two degrees negative centerline body works well FiB designs thrust line almost parallel wing chord glide nose high flight attitude combined flat-bottom fuselage believed make flying surface too could improve glide duration Aerodynamics have stated adds drag am convinced model named Pace Shuttle Jack Phelps SAM 56 club meeting profile resembled Space Shuttle wing Pacemaker hence name Pace Shuttle strongly urge Moffett rules switch back original rule larger fuselage cross section L2/100 reduces performance slightly makes category interesting fun Models can have character have larger fuselage work designing new model Just look variations old Wakefield designs Korda Clodhopper California Champ Hi-Ho Gypsy Linns Kansas winner etc Note boring designs P-30 Coupe Wakefield least casual observer look alikeWhy preserve little great Moffett tradition Modification existing design would require addition simple fairing minimal drop performance should very popular event meets around country Jim Bennett congratulated making category reality again Les DeWitt Wichita Kansas Tech Debate Continues. January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105
Edition: Model Aviation - 1994/03
Page Numbers: 5, 78, 79, 80, 81, 87, 88
Letters tc Ecfitcur Microhenrys Debate Enough alreadyis Letters Editor forum pros cons cartoon reader dont [sic] like turn pageIts like switch TV thats what Scale Corrections Robert Ford Long Beach California Ive got make few corrections some information contained Radio Control Scale article December issue Model Aviation article author identified Bell Aircobra P-39 400 error P-39 P-400 P-39 400 P-400 Bell cheap export model P-39 played major roll ground support Marines later Army Guadalcanal 67th Fighter Squadron 367th Fighter Sq 347th Fighter Group US Army Air Corps based New Caledonia flew P-400s August 1942 detachment flew Guadalcanal way New Hebrides just few days after Marines landed Guadalcanal photo article very good showing Fighting Cock door plane October group us transferred 70th Fighter Sq Fiji Islands New Caledonia flew some P-39Ds Guadalcanal flew 339th Fighter Sq 67th Fighter Sq So P-39s P-400s flying Guadalcanal same time P-39 high-altitude fighter plane would scrambled prior daily noontime bombing raids would climb maximum height Wed hanging props about 27500 feet Bettys Zeroes would 3000 4000 feet above us Joe Foss Marine pilots F-4F4s would making overhead passes Japanese planes another story 2 - ---339th Fighter Sq got Lockheed P-38Gs November Enclosed snapshot three RC scale models three full-scale pursuit planes liked best fly P-36A 77th Pursuit Sq logo side 20th Pursuit Group P-43A Seymour-Johnson Field Goldsboro NC best P-38Gs flew Guadalcanal P-38G still turbo supercharger intercoolers wing leading edges under tbe engines sleeker speedier look William C Sharpsteen II Renton Washington Dislikes Free Flight January 1994 issue Mr Jim Sears exhibits bias toward free flight community negative statements concerning actions free flight contestants AMA Nats Muncie heart-rendering description elderly woman tears fear because free fighter requested permission look model nothing baloney says could believe ears Did help chase model lost could have witnessed horrible deed regards concern about using motorbikes have heard minor accident since bikes introduced years ago Getting hit 25 lb RC far hazardous health Speaking personal experience have chased hundreds free flight models since 1940 havent driven elderly woman tears because fear free fighter Maybe should send questionnaire free fighterssee elderly people have frightened lifetime Mr Sears apparently doesnt care free fighters obvious statements has made column As subject column first time have seen mention free flight its negative description regards intrusion have lost three excellent RC sailplane fields due uninvited power fliers flew sites permission respect skill demonstrated RC modelerstheir airplanes have contributed greatly hobbybut no time will Continued page 78 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS RetailApprox Part No SizePriceWeight TT-1 502-B 11/2$1495058ox TT-1 752-B. 1314159509502 TT-2002-B 2189510002 TT-2252-B 21/4199516002 TT-2262-B 21/4 FAt. 219515002 TT-2502-B 21/2219519002 TT-251 2-B 2-1/2FAI2395170oz TT-2752-B 23/42695220oz TT-2762-B FAI2895200oz TT-3002-B 3309526002 TT-301 2-B 3 FAI329525002 TT-3252-B 3114419534002 TT-3502-B 3112549547002 TT-3752-B 33146495520oz TT-4002-B 47995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner PROP NUT ADAPTORS V Relail Pan NoSizePrice TT-0140-A 1/428 $595 TT-01 47-A. 1/4-28/7mm . 595 TT-0610-A.6x1Omm .. 595 TT-0710-A.7x1Omm .. 595 TT-051 6-A 5/1624595 TT-051 8-A 5/16-24/8mm 595 TT-0810-A.8x1Omm 595 TT-0825-A 8x 125mm TT-0375-A 3/824695 TT-O1 25-A. lOx 125mm695 Approx Weighi 061 ox 061 02 . 063 ox . 082 ox 076 02 076 02 076 02 075 02 117 02 115 ox 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 March 1994 5 SPECIALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS Letters Continued page 5 demean efforts As regional VP can expect impartial representation District VI written propaganda accepted people like myself have learned enjoyed free flight lifetimes suggest Mr Sears sit look back what writes representative AMA article reaffirms what have known long time just doesnt like free flight Art Christensen Ren ton Washington Art present USOC can assure elderly woman garden incident very real discussed USOC report February issue Regardless feelings about what written shameful disgraceful incident Perhaps other FF references Jim s column subject debate Liked Box article December issue Whats Box great Lets hear LF Randolph As youth radios big jars glowed got hot tried digest electronic theory got lost holes semiconductors Mr Randolph has perked interest again very simple approach man should consider writing book introduction electronics about series articles equipment works have caught little crosses dashes battery now would like learn like dont companies color coordinate wires better colors wires clash have style Type too Small Question print type size smaller compared other printed articles subjects versus AMA News section Refer January 1994 issue other earlier publications am interested AMA News details information whatever RC hobby Presidents Corner titled Communications has some relevance subject above comment Dont Care attitude towards AMA elections example may have association readership reason neglect care concern other AMA members organization whether business fraternal industry banking education health care agriculture others has center group leaders center group say care choice many reasons maintain reader interest improvement towards print size standardization can could lead enhanced reading larger print size used larger sections magazine AMA News section dont have dimmed eyesight before read section will shortly after it. Donald Kreis Troy Ohio AMA News pages feature smaller type because VP/officer allowed magazine page column Using smaller type allows copy fit page jumping officers columns continuing text another page allowed Increasing type size means less news district officer theres tradeoff Technical Matters Article II Purposes AMA bylaws states .the primary object AMA promote foster educational scientific advancement modelaviation. am disturbed way Jef Raskins letter Editor presented commented upon December issue ModelAviation put label Theory Fact eloquent factually unassailable discussion aeronautical science misses point entirely imply editorial response Raskins critique realm opinions can serve lead Duke Iden uninitiated further wilderness Lima Ohio Raskins letter deals aerodynamic concepts have misunderstood author recent articles Model Aviation An example aerodynamic concept lift coefficient defined ratio wing loading dynamic pressure representative lift rather defines flight condition might say measure close stall small lift coefficient means stall remote large lift coefficient means closer stall both cases lift exactly same use terms lift lift coefficient interchangeably matter opinion has opinions novels art work definition definition definition suggestion Subject technical articles peer review such done technical scientific journals UUH IltV-UI INVNIUHY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAIMC vast pool knowledge talent available among AMA members would probably simple task set up panel competent reviewers Jorgen Skogh La Honda California As university professor devote myself teaching mathematics engineering students convincing importance being precise really understanding theory Thus am writing take exception rather alarnung response letter Mr Jef Raskin December 1993 issue deals issues Mr Raskin quite rightly described errors found latest article aerodynamic design written Mr deBolt September issue Model Aviation must say am sorely disappointed expressed position Mr deBolt s articles should considered representing opinions such undeserving types criticism always seem generate Unfortunately Mr deBolts errors mere divergence opinion would put very glaring errors regards aerodynamic theories themselves despite long-standing use could questioned guess application theories use precisely defined terms mathematical objects meaning use beyond question dare say would publish article author opinion F-86 designed built Cessna propeller driven would assure Mr deBolts articles abound same types mistakesthey factually incorrect disservice aeronautical sciences treat such errors casually Finally find hard fathom position Mr deBolts August article does misuse word canard Mr deBolt writes canard final planform worthy mention . clearly indicates belief canard refers type wing planform ie shape wing viewed above would correct spatial arrangement wing relative horizontal stabilizer suggest meant Mr deBolt later writes .for canard put taper LE swept tips back speak first flew wing normal configuration Any reasonable person would take Mr deBolt s words meaning wing main lifting surface its leading-edge sweep near tip what canard Moreover article Mr deBolt gives no indication nor shows pictures airplane tail first canard arrangement seems just confused about meaning term about number others uses articles reproach Mr Raskin chiding him criticism indeed unwarranted spite laudable deference have tried show Mr deBolt years experience negative attitude about justifiable criticism have received concerning Mr deBolts articles direct contradiction what should editors first duty uncompromising commitment accuracy would like suggest future owe readers have Mr deBolt s similar technical articles reviewed accuracy persons competent Vincent D Panico Stockton California Please see Now Youre Talking issue Multiengine Control has rumored George Burns said three days before Lindbergh left Paris What country needs good five- cent cigar Mr Burns knows wont get what dont ask Therefore come cant buy aircraft multiengine transmitter two throttle controls checked Bob hobby shop said ACE makes such device boats come nobody does model aircraft inquired explained Aircraft transmitter manufacturers keeping low profile feel anyone would risk 500 several thousand dollars radio signal unstable made product intent breaking several engines once could forced over edge subject government regulation got thinking half-million members AMA might thousand us borderline psychotics have jobs pay taxes might interested transmitter would permit differential operation least two engines model aircraft anyone should agree please send postcard get dozen will try interest manufacturer producing such device way today Jim Squires 625 Oregon Ave St Cloud Florida 34769 Mufflers As president active control line club receive lot criticism fliers events other Aerobatics complaining dont include contests Because clubs flying ianese Zero lissue fl Const ucton ~J Construction Wj No proRequires bu dngcutting experience requiredfitting Builds pre Assembles easily withprinted Balsa parts pre-printed & die-cutstripwood & Japanese partstissue 0 Build quickly & fly great Select Micro-Cut Quality wood parts 0 Quality hardware included Legal FACNo-Cal events 16 wingspan 0 Available local hobby shop GASPARIN MICROTECKNA C02 LINE OF ENGINES GM-63 BORE 4mm STROKE5mm VOLUME0063cc WEIGHT10 grams RPMS&X-2400 RUNNING TIME63 sec GM-i 20 BORE6mm STROKE6mm VOLUME012cc WEIGHT18 grams RPMS600-2406 RUNNING TIME . 63 sec GM-300 BORE8mm STROKE6mm VOLUME030cc WEIGHT20 grams RPMS600-2400 RUNNING TIME . SO sec $5995 4495 p $ 5995 GM-120 TWIN CYLINDER$ 8495 ARF & KITS AVAILABLE IMPORTED EXCLUSIVELY IIOKEY 3L1JE 600 525-7493 FAX-714 459-1760 DISTRIBUTED ALSO BY 510 MANUFACTURING PECK POLYMERS BORE 2xSmm STROKE 2x6mm VOLUME 2x012cc WEIGHT 20grams RPMS 600-2400 RUNNING TIME . 63 sec March 1994 79 areas noise sensitive mufflers required dont include Racing Combat Speed events contests since airplanes required use mufflers AMA rules require mufflers too would have such events Racing Combat Speed achieve good participation unless AMA requires mufflers contests will include loud events because participation just wouldnt everyone use mufflers hobby would likely support unusually loud events Thanks listening didnt have shout Larry Barickman Orlando Florida Reliant Help would like respond letter January issue Karoly C Fogassy concerning Sterling Stinson Reliant too struggled through building kits am retired still used up whole winter thing finally turned out beautiful airplane although planned flying did install control linkages etc could fly decided later date After just hung looking pretty few years did get urge see would fly installed radio got ready go Immediately after first takeoff rolled left went knew right away what after repairing slight damage tried again sunny calm morning no witnesses time held down elevator until picked up about speed could ground let lift off keeping climbout angle shallow flew just beautifully what sight behold tried some loops great tried some rolls great would start roll real slowly first certain point would sort flip through rest roll have never before since seen airplane roll like Anyway continued flight mostly just awe beauty fact actually flying Stinson knowing long Enya 45 would run 12-ounce tank throttled back brought perfect landing taxied up could look through windshields fuel tank taxied position took off again After engine suddenly quit dont know still out fuel too low heading away runway attempted dead-stick 180 made it heading what looked like another perfect landing suddenly just started rolling went few feet short runway repaired damage best could plastic cowls landing gear fairings easily repaired took radio out hung back up still will probably always will suggestions can make try again sure first tailheavy let get plenty speed before comes off dont ever let slow down very much until ground again will fool youlooks like floating like sailplane critical speed reached doesnt stall drop its nose like will just turns uncontrollable brick suppose Scale models way especially smaller ones sure thought Stinson would exception rule surprisingly enough William F Stodgell Jefferson City Missouri experience writer column concerning Sterling Stinson Reliant kit might approached follows Use Enya FS 53 11 x 7 prop Add extra wing bay bringing wing span 62 inches Cut elevator throw mind ailerons rebuild flies accordingly However attempted after intermediate advanced 80 Model Aviation 4 VIDEOS 1 FREE 25 93 UJ SCALENABTERS CHAMPS RDCKET MAr AIINERDENSAFBU US MARINE CORPS AIR MUS2 14r.51995 24 05AA LAS VEGAS ScHES AIR MUSEUM MUNICH HAWK MUSEUM N wait ODADON UNKS2 Hrn.S1O95 23-IIEVERGREN SCALEUASTERS93 GRANDE BONDE lUSH PILOTS DAHO SCALE SQUAD. lIBERAL AIR MUG TOWN AIR MUS JENNY PLANS COMMERCIAL2 Hrs.51995 F1 I~rL1 I] 6J1 RZ V2NWSeapNneStampePIoctorN- hstAir Moe l wjSeidel Motorenhas oledo 2 Hrn.SIBU 931y Scalemasters 98 MM KeizerWartirds Mug 93 NWEapoNASM. 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S1i95 CnrtlusJNUO Jeeny Plane FUN SCALE tOO inches 1804 sq in. 11 Its 8 sheets wllnetructionn .91995 10e07 SE STACY CT PORTLAND OR 97255 PHONE 503 653-2578 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS M&M CONCEPTS I7MILPERACREscE&rWANTIRNAVIC 3t52 AUSTRALIA e 03-801-3899 03-887-3472 BETA Bandits 1 OClock E-2 P-38 P-40 Now F4U Corsair Pedal Planes will have much fun building 3-6 year old will have Flyinglt Kit includes full-sized patterns complete Instructions cob nhntn 1kv nf B US & Canada Plus $400 P & H MO Res add 60/s sales tax Specify plan wanted Flight Line Toys PO Box 3484 Sprinafield MO 65808 D & J ELECTRONICS Howell Michigan 48843 900517-546-2644 J Service&RepairsForMostRadioControlSystems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsed AMA/RCMA Sticker Station #105 Futaba Airtronjcs JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance Extra UPS U S MailCODs VISA / MASTERCARD & DISCOVER WELCOMED AMA #256123ARRLWB8YSQ training flights Originally control line kit both guliwing pronounced tapered wing Building light must Any construction sins will immediately convert power curve wing loading stall syndrome used lightest iron-on covering available white green copying New York City Police Department Reliants flew out Holmes Airport Jackson Heights during late 1930s Having arrived area May 1940 first must build someday aeroplane Lionel J Lusardi Maywood illinois Safety Concerns Ijust received January 94 issue could believe picture shown page 18 CR Prices feet controlling sticks note flew two models simultaneously goes against better judgement safety practices can major event like allow type dangerous flying happen public hand Considering young people new fliers reading articles type novelty flying should condemned certainly would field strongly urge Safety Comes First editor review stunt Al Arnold Budd Lake New Jersey Buccaneer B can shed light Bill Dabneys search Buccaneer B Special Letters EditorJanuary 1994 MA maybe can send beam direction would also like congratulate Robert H Munn article Neglected Art Covering Model Airplanes Silk have read reread rendition subject help has provided believe can fairly decent job detail has given subject magnificent pictures great have set plans Buc have beefed-up RC Im happy Any info can supply will certainly go unappreciated Bud Smith Mishawaka Indiana Moffett photo 93 Moffett entry enclosed Bob Bienenstein appeared win Muncie rather handily second time wasnt easy After three- fourminute rounds four starting five minute round Two fliers dropped leaving one-on-one flyoff Bob model perfonning flawlessly others commented its great climb lot fun Thirty seconds after liftoff climbing very high rear peg slipped out rubber shooting forward explosion ripped fuselage wide open slowed descent took minute come down 700 turns left came fourth Contestants filled what stories rest story model appeared real throwback 1940s Other models sleek appearance high-aspect-ratio wings long fuselages folding props gears etc free-wheeling propeller fixed landing gear stubby wing fuselage set apart real clunker image further strengthened winding stooge wouldnt fit models extra-wide body use other fliers gear use offered chase bike surprise shown own fun filled model ever flown never tested until morning contest Only Continued page 87 IT YOURSELF % Save Time As low $1095 Sinithy write Smithy Dept MA Lathe l 3023 E 2nd Street Dalles DR 97058 ji E~I z Great Selection [1] 55 72142 316&60z EIJEEZ MLII Super Prices U 14 oz. 38 w. 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January Letters contained comment Bob Meuser recent article centrifugal force reader reaction Reader John Vesper replied Bobs letter criticism own forwarded Mr Vespers letter Meuser asked comments Both letters follow am writing response two letters appearing January 1994 issue defending previously published article centrifugal force article itself factually inaccurate two letters followed can described scientificly [sic] illiterate Mr Meuser states fall asleep box box put space set spinning would able determine whether force holding him floor gravity acceleration body circular path further states could perform no experiment within box would have outcome different same experiment performed Earth Both statements error Mr Meuser tell would have rotate head 9O either side March 1994 87 Get RIC guide tailored fit needs Radio Control Buyers Guide 17th Edition et R/C product source thats tuned needsthe 3 Radio Control Buyers Guide 17th Edition handy reference oI guide thousands products facet R/C modeling ThehOPed mod615 Radio Control Buyers Guide covers R/C hobbies including planesflew ctnttc/es helicopters cars monster trucks boats engines radios field acces-6flfry es toolsandoamp years guide custom tailored fit requests finished creations all-color Showcase sections greater number how-to articles Plus new companies expanded line entry level cars competition level trucks make guide R/C reference youve waiting Get R/C guide perfect fitthe Radio Control Buyers Guide #12127$1195 [v32][b-1-10-1-10]] Send roe ______ copys Radio Control Buyers Guide #12127$l195 *Entor total amount finn Us coupon mail Kaimbach Publishing Co Dept X0836 21027 Crossroads Circle PO Boo 986 Waukesha WI 53187-0986 Include postage handling US add $300 4th class $450 UPS continental US Canada add $500 other foreign add $1000 Wisconsin residents add 5% sales tao total Canadian orders add 7% GST total Payable US tends Prices avail ability subject change Name ________________________________________________ *Total Enclosed $________________ Puma Imids poseapsad taus IAddress ________________________________________Credit Card # ___________________________________ accept Americur Expreon bib $15 MasterCard VISA CityFopiration Date_______________ Phone # _________________ __________________________________State ZipSignature ______________________________________ XD836 Look book local hobby shop call toll free 800-533-6644 24 hours day Please have credit card ready Fax 414-7%-0126 Outside US Canada call 414-796-8776 Seven models available weigh both gins & ozs High accuracy guaranteed tare1 have strain gage transducers Whether build indoor models big birds between have scale Send #10 SASE brochure Discount prices $9900 up $29250 Includes AC adaptor UPS 1 yr warrantee Champion Model Products 880 Carmen Court LaVerne CA 91750 909 599-3348 WORD S WOE VAX OFAU HEN IFY NO * MODE PLANS * ON V SMAL ASSORT MEN SUDREOW REOU AR N STOCK PLANS OFT OUR FAMOUS IABBREVIATED 8647 1/24SZ 1/L6SZ 1/8 SZ 1/6 SZ 14 SZ 7DoHav COmE IE22420324$3266444132S8 40 Vooghl 1000 74020$2030 266045 15 Coo JT44D JeEny21 1832 24653886$52 27 LIodbRUgR NX21115$5434 $2469$3491$40 29 MOEO TPXWIX815 1422 $20453460448po62 36 Weotlod LyOCOdRE25 1837 $2475302 35 DOR 046A Oko23$2434$32LU46 29Boo og 100 SpooK15$1622442445 361609 33SKID TOIROtOO30 3045$3890 6212U7 39Look LI ht P3827 1939 267845 39Coo P3 F g6K1841528 2056 3 I2$36 25Vgt Coo 0201/418 2037 2954$44r08$ 38Coo Cat1 FBY3452 4878 6U10474 19COOKIRO 8C4624 6694$89 17FOkIRO 07 FIr 14 1221 $16o30449 31BayloR GREB.114 1217441435324 44 70i6 12 SOpOEMOIX S6B15 10224$13444266038 892 36Orom Go1f6ok144$14214$T843434 SCA1Z FL 3S Look ElooKo #1127$251$325538LookElco 43 Groso Avoogor ml30$2840 $38 102 ord388 46 42Boo 8170 FlyFort51 $4077$55BOO8170 38ML 88IKEISOII 82536453755 $52 34 SooICoKo1C7215451523$2264$35 -26 37Cur T8aoy 5031119 018Z94$245736SKIDA Tn 25CRbOE 1311 4211 $151644200 odlyFO o 34 Doog Tramp 01347 $407145U 00 33Cort IMok 16K15441523 4$ 2247 32DoolltKloR OWlL124417184$2237354946 74 31Roe 748344 712815 $16224520 32Sprfld BollDog13441620 $2040325 80 34Toror 8W boOr13 1219~1639285oO 78 32Howood 544814104g121515312662 35How Hr 4llIgao16$1523~2047326444 94 33BORP26ALow Woo14815212042326345 84 35SKIooo204416314725 4208 HooqolKo BoeS37462441 43581 5040865 37SOROOmO FTI16$18244722 43N Elk WIdow 1614947509975 30TrIO I8wk TA13144 1321471843 86 42CHolldlvr 0821425 253747357460I~ 26Ford TrIotE 4AT38$3857748 31Blloooa AIX Boo32$2248$30f 33Groins 127 DOEk19452829401 27CSookawk 7711154418234124473863150.94 2801k AephIb 0-3836 $34544240962 168PER 0400 Book5O04575$S6I~ti 31LIyR LSIrIoo21 $163144228$36 31howard RaoPetO10$1$15 $1530$3060 311 Sparhok 191212441519 $2238$35501448176 33ARXOOCA 13 Opt18$1027 14534526107 38Toroor P000 Ip124$16184 2037$3649$4$j 744 03WrIght FlIer04 18304 24604438READ BEFORE 08011180I*PI Oil SCALE 802 BIlE HINI88M ORDER55 00 48 AVANARLE AT 088 BE SURE TO ADD THE USU. . H DOLLAR UNDER TOO 8528 AL lOT FOR PACKAGING POSTAGE 6140 INSURANCE T THOUSAND ADDITIORa PLANS 0 H488Y SIZES 0 S0o$7 1ATASOO $200 OR FROCK LOST ALONE $1 X FOREIGN d within semicircularquantity means has both canals ears would immediately tell him something amiss experiment chose perform involving momentum would immediately show system frame reference under acceleration release object top box let fall bottom would fall straight down released object would have instantaneous velocity tangent circle described about center rotation Once released would no forces acting upon its motion would no longer change would follow straight line along tangent straight relation Universe As box continued rotate about center rotation object would appear fall toward bottom box would start approach rear wall box seen inside box because instantaneous velocity box has changed direction object has continued same direction headed released object able pass unimpeded exterior box once box rotated 1800 object box would headed exactly opposite directions Similarly gyroscope set motion plane rotation other box would seen tumble maintained its orientation Universe box has angular momentum same Universe What has done misapply fact cannot detect velocity frame reference within frame reference An object circular motion constant motion accelerating can detected within frame authors [George Abbott centrifugalforce article July 1993] rebuttal worse quotes Newton profusely regarding force being opposed equal opposite force neglects another Mr Newtons laws force x acceleration force object opposed equal opposite force net force object direction zero thus can no acceleration. No acceleration no circular motion further misuses DAlemberts Principle pertains objects equilibrium states equilibrium maintained forces must balanced circular motion state equilibrium steady acceleration Acceleration defined change velocity velocity vector magnitude case speed direction speed may remain constant direction constantly changing means acceleration means no equilibrium Ergo DAlemberts Principle does apply goes state virtual forces opinion fictitious precisely what term virtual means scientific context specifically appears isnt refer term virtual reality means experience world has artificially created sense isn t really return Mr Meuser s box space what experiences gravity force him trying go directly away center rotation due fact box having force him same path taking having accelerate him directly direction center rotation 900 direction instantaneous velocity given moment speak retrograde force cars acceleration forces us back seat due fact car trying pass us own body mass resisting change velocity car having exert unopposed force body order match bodys velocity its own difference centrifugal force case circular motion acceleration direction right angles direction motion instead being line motion saddest part numeric formulae quoted article correct force necessary accelerate plane through turn loop centrifugal force object within motion John Vesper Tulsa Oklahoma Mr Vespers description statement previous letter gross distortion what said Either didnt really read letter read didnt understand read understood chose deliberately distort Since did state intend imply what Vesper bases criticism little point responding criticism wants nitpick can poke holes argument ones described Vesper argument valid however first order stand point seems have gotten lost somewhere centrifugal force indeed force Meuser Oakland Calfomia 88 Model Aviation 4.Ieveland Model ana uppuy Co4I~ IdOOXO 1 Po6dANOoS 8XI FIodOIXO 1059 IITTT~"I 88R RETROET 69788K CLKWIANROHIO 48105