Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California
Edition: Model Aviation - 1994/01
Page Numbers: 5, 8, 19, 22, 78, 95, 96
Let ters tc Editor S BiIgri Joe Bilgri world champion Indoor FiD passed away sleep September 29 1993 Mentor Wakefield FiB world champion Joe Foster Indoor FiD world champion Bud Romak Joe several National Teams representing United States Indoor Nordic glider Fl Wakefield gained second place Joe best known innovative designs addition aerodynamic qualities simple concept easy build Bilgri X propeller block example rest world laying out propeller blocks complicated manner Joe developed own layout system used half amount balsa provided essentially same wood grain blade assured perfectly helical pitch Joe Foster first adopt Hank Coles 0-So-Long type Wakefields Joe gentle person often appearing shy fierce competitor loved good contest though could no longer fly under doctors orders planning attend World Championships Lost Hills SAM Champs Taft friend Joe Foster wanted encourage longtime friend George Xenakis current FiB team member World Championships Joe Foster Bud Romak SAM Championships passed away hours after talking Joe making final plans trip over 50 years Joe respected elder statesman Oaldand Cloud Dusters will remembered over gin tonic two championship contest Charles Dorsett Walnut Creek California Centrifugal Force Im writing response two Letters Editor page 117 October issue regarding George Abbotts article Centrifugal Force July 1993 issue Centrifugal force outward force body resulting its traveling curved path real force can get balanced equal opposite centripetal force statement because centripetal force called gravity true misleading Since word centripetal defined directed moving toward center axis gravity could indeed considered centripetal force has nothing whatsoever motion curved path usual definition applied context used context misleading gravity supply total centripetal force associated speed rotation Earths surface speed would have equal escape velocity Gravity universally regarded force sit chair Gravity pulls downward exert force chair equal weight chair pushes back equal opposite force Now let go sleep put chair big box send whole shebang space Out box connected separate equal box long cable both boxes set motion rockets perhaps about other speed equal weight Momma Earth wake up feel exactly same did sitting chair Earth push down same force pushes back same force fact no experiment could perform within box pendulums atomic particles light rays etc d give results different same experiments performed Earth short centrifugal force real force gravity As whether inward acceleration body traveling along curved path causes associated force force causes associated curvature path since force path curvature cannot exist independently makes little sense argue about cause effect Bob Meuser Oakland California see current issue MA two letters taking exception treatment basic concept centrifugal force taking task presenting relationship distinction between centrifugal centripetal force Since did ask respond letters before published assume did feel detracted value article did think published response warranted okay because think average reader would Continued page 8 PRECISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Part No Size Price TT-1502-B 1112 $1495 TT-1752-B 13/4 1595 TT-2002-B .2 1895 TT-2252B 21/4 1995 TT-2262-B 2-114 FAt 5 TT-2502-B 21/2 2195 TT-251 2-B. 2-112 FAt 2395 TT-2752-B 23/4 2695 fl2762B 23/4 FAt 2895 Th3002-B 3 3095 TT301 283 FAt 3295 TT-3252-B 31/4 4195 TT-3502-B 31/2 5495 TT3752B 33/4 6495 TT4002B 4 7995 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Btade Spinners Avaitable Sizes Add $300 Per Spinner FlelailApprox Part No SizePriceWeighl TT-0140A 1/428 $595 . 061 02 TT-0147-A 1/428/7mm595 . 061 02 TT-0610-A 6x 10mm 59506302 TT0710A 7x 10mm 08202 TT-051 6-A 5/1624595 076 oz TT0518A 5/1624/8mm 595 076 oz TT-081 0-A 8x 10mm595 07602 TT-0825A 8x 125mm595 075oz TT-0375-A 3/824 695 117 oz TT-01 25-A. lOx 125mm695. 11502 3 Pieces Nut Washer arid Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 January1994 5 Approx Weight 058 02 095 02 100 02 160 oz 150 02 190 02 170 02 220 02 200 02 260 02 250 02 340 02 470 oz 520 02 570 02 PROP NUT ADAPTORS V HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood 44 intermixes adhesive the~KADHESIVE FUSING WITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula VERITE Film CO 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Seven models available weigh both gins & ozs High accuracy guaranteed tare 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 PLAN e,oou800 PLANE VIDEO GIVES YOU UBRARY OF VIDEOS ON THE CONSTRUCTION OF RADIO CONTROLLED AIRPLANES WITH EASY TO FOLLOW INSTRUCTIONSI NEW BUILDING ARF NEW Almost Ready Fly Airplane 2-HOUR VIDEO THAT WILL GIVE YOU ALL THE TIPS AND TECHNIQUES TO GET YOU TO ThE FLYING FIELD WITH WELL BUILT ARF $1995 shipping $800 foreign orders TECHNIQUES WITH FIBERGLASS 2-HOUR VIDEO ON ALL ASPECTS OF CONSTRUCTING FIBERGLASS FUSELAGES GLASSING IN FaRMERS INSTALUNG HATCHES AUGNING THE TAIL AND WING FIWNG PIN HOLES PRIMING AND PAINTING $1995 shipping $600 foreign orders BUILDING IT RIGHT 2-2 HOUR VIDEOS SHOWING ALL DETAILS NECESSARY TO CONSTRUCT WOOD AIRCRAFT INCLUDING WING CONSTRUCTION RADIO INSTALLATION PUSHRODS AUGNUENT BALANCING AND MUCH MORE $3495 $400 shipping $800 foreign orders Ottler tines available lot $1995 $350 S&H $600 foreign Aerobatics & Grotaid Suilool Building Will Foam TAPES AVAILABLE IN Ill ONLY SEND CHECK OR MO TO PLANE VIDEO PO BOX 23128 CLI VE IA 50326 OR cALL 1-800-383-8251 24 HR TOLL FREE OR 515-223-0507 2IOWA RESIDENTS PLEASE ADD 5% SALES TAX Letters Continued page 5 confused such discussion chose address article However want assure two letter writers fact understand distinction between centrifugal centripetal force further am confident presentation strictly correct although certainly fully comprehensive treatment subject writers quite correct inward force exerted small boy swinging rock centripetal force force constrains rock follow circular path opposed inertial force rock wants proceed along linear path Newtons first law argued since force defined push pull acting upon body inertial forces really forces very satisfying notion flies face common experience also gets us trouble apply DAlemberts Principle Principle states part dynamic system equilibrium forces must balanced Since rock-swinging example centripetal force balanced inertial force can define inertial force resulting acceleration rock virtual force call centrifugal force believe commonly accepted definition concept virtual force virtual work used variety problems dynamics would suggest Mr Kuhnle virtual fictitious same would hope Mr Harrisons college physics teacher would consider virtual force virtual work DAlemberts Principle mysterious Now above discussion applies case have fixed frame reference case person standing ground swing rock consider moving frame reference ie rock point airplane force resulting centrifugal acceleration acting mass Continued page 19 8 Model Aviation & stand $26gU Stand folds flat transportation A & C SAFE-T START box & flight box $25g95 8 & C $42gg5 JW KIeinIamer PO 805 187 cos CA 93430-187 805 995-2129 Shipping & Handflng Nol IncludedC Letters Continued page 8 body motion no longer virtual just real weight force resulting acceleration gravity acting mass am sure nowhere article did refer forces other acting upon body motion ie airplane rock example stated rock experiences force Both writers pointed out did explain airplane turns due component lift directed toward center curving path quite correct did primarily interested discussing forces experienced airplane effect airplanes behavior could very well have included another parallelogram forces resolving lift vector vertical horizontal components maybe should have prepared article felt addressing lay audience minority would have college-level engineering background interested providing feel magnitude forces models experience flight describing effects did want confuse issue detailed discussion would distract reader primary point article George Abbott Raleigh North Carolina Reliant Help Requested son have taken up RC flying January year have averaged about five hours flight time per month 13-year-old has advanced Tower 40 trainer faster planes like Super Decathlon have opted stay slower stable models such Goldberg Eagle 2 like looks older classic models have purchased Sterling kit Stinson Reliant took effort easier models such Goldberg Great Planes have built Continued page 22 risk engines performance anything less True AAC ABC piston/cylinder assemblies Now available over 25 different types popular engines choice professional modelers worldwide Send $200 1993 catalog Performance Specialties ox 3146 nerville NV 89410 Phone 702 265-7523 FAX 702 265-7522 January 1994 19 Master Airscrew propellers combine thinner airfoil sections efficient tips resulting greater thrust noise suppression true tip path Classic G/F K Series made 33% glass-filled nylon strength durability out-performing out-lasting wood other plastics both water sand gravel runways New Classic Series 1 2 24 engine has semi-scale appearance superior performance Wood Series made lightweight kiln-dried beechwood 9 16 inch diameters Heavier maple used 18 24 inch range Available local hobby dealer G/F SERIES black glass-filled nylon8x4 8x6S1 35 55x4 55x4$ 999x4 9x5 9x6 9x8 95x6155 6x3 6x35 6x49910x6 10x7 10x8175 7x47x612511x6 11x7 11x75 11x9195 K SERIES black glass filled nylon 4x6 4x8$495 12x6 12x8$285 15x8 15xl0595 13x6 13x8385 16x6 16x8665 CLASSIC SERIES black glass-filled nylonI 8x6 8x8 1 8x 10$ 1295 16x6 16x8 16x10$ 795 20x6 20x820x101495 WOOD SERIES beechwood maple14x6 14x8 14x10$ 525 9x4 9x5 9x6 9x8$ 195116x6 16x8 16x10895 10x5 10x6 10x7 10x822518x6 18x8 18x101395 11x6 11x7 11x8 llxIO25520x620x820x101595 12x6 12x8 12x9325 22x822x1022x121795 13x6 13x8 13x10395 24x8 24x1024x121995 See local Hobby Dealer Master Airscrew Propellers & Accessories WINDSOR PROPELLER COMPANY 3219 MONIER CIRCLE RANCHO CORDOVA CALIFORNIA 95742 Letters Continued page 19 several powered gull-wing Reliant 57inch-wingspan version Royal 40 10 x 6 propeller having confidence flying Scale models asked trainer test fly model agreed first attempt Stinson took off effortlessly after climbing about 15 feet tail end suddenly squatted plane began violently pitch back forth wing wing flight aborted power shut off plane dropped like ton bricks straight down managed land its landing gears No damage sustained determined nose weight needed After adding about two ounces second attempt made Again plane took off normally after gaining about 40 feet altitude Ryal 40 stalled just plane leveling off caused plane go uncontrollable dive spiral result crash extensive fix would like hear readers have flown particular model problems have experienced problem corrected way found modelingfRC flying great way spend time teenage sons daughters recommend parents look possible means entertain spend meaningful hours children dont surprised advance faster soon become trainer Karoly C Fogassy Seattle Washington Help Wanted deep-down satisfaction read article Robert H Munn Covering Model Airplanes Silk [October 1993 MA] saw beautiful Buccaneer model built twelve-year-old Continued page 78 REALISTIC MOTION CONTROL VALVES valves feature exhaust speed control UP1 Independant speed control & switching struts $2895 UP2Strut & door control Mustangs Door opens strut lowers door closes Door opens strut raises door closes $7465 UP3 Strut & door control valve P47 Door opens-strut lowers-door stays openStrut raisesdoor closes$7465 Door Cylinders metal -5/16 bore1 & 15 inch stroke $1900 6 inch diameter scale Mustang wheels Machined bar stock -8 spoke hub bronze bearings solid foam tire weight 10 oz $11500 pair Dealer inquiries welcome ULTRA PRECISION Technical Services Ltd 1244 Honeysuckle Crescent Oakville Ontario L6H 2S8 Canada Phone 905 842-1703 prices US funds Shipping valves & cylinders $450 RENO UNLIMITED MUSTANG RETRACTS 50 Lb rating Totally enclosed mechanism -all metal1 inch air cylinder 85degree retraction Fits between ribs$579O0 including UP2 valve 22 Model Aviation lSIE Al USC 111W Letters Continued page 22 forties truly moved have trying find set Berkeley pians Buccaneer B Special some time After reading article feel may hope finished model did look anything like believe does However Mr Munn has encouraged try again can find beloved model plans can shed light search would very much appreciated Bill Dabney E Elmhurst New York Too Proud usually read laugh forget about letters editor November issue made ponder Genie Brown Miramar Florida says 62-year-old husband Tom having problems learning fly wonders too old learn sounds Tom making age-old mistake letting ego get way Nowhere does mention instructor retired electronics engineer age 67 accidentally got interested hobbymainly out boredom However took about two days observing decide way fly get qualified instructor least first few flights no other sensible way Usually qualified instructors either free hire flying sites Believe worth paying $100 lessons rather creating couple hundred dollars crash damage Fortunately asked old pro would help learn fly said sure have now made over 400 flights including over 400 landings 11 different airplanes am now starting aerobatics Yes have share crashes 10 nothing compared what would have proper instruction So advice Tom swallow pride ask help Glen Benskin Tarzana California Cover Story reply An Eagle-Eyed Member Cotnments [Letters October 1993] Tlush Mite June 93 cover did look bad attitude unstable Just release strong wind gust caught model After release recovered made good flight Actually plane flying picture ol Ron has death grip fin no idea photo made action total surprise get June issue MA find cover Jim Alaback took photo legendary guy always has answer flying San Diego Aeroneers club SAM 41 Bill Aibright San Diego Cal Wornia photo AMA club activity positively impacts acquainting young people model aviation generation new participants radio control model building flying Seven Lakes Aeromodelers Club AMA chartered has three years volunteered conduct two- threeContinued page 95 78 Model Aviation ou CAN oi.rr LAUNCH OUT SOAR AND 01ff LAND FOR LESS Genesis all-composite precision-molded thermal duration competition model available market today Synergy F3B models highly competitive everything thermal duration slope racing Limited time pricing Genesis $449 Synergy Ill $599 Synergy 91 $549 SB/XC $749 Available exclusively Slegers International 201 366-0880 RnR Products 1120 Wrigley Way Milpitas cA 95035 408 946-4751 G n BRASS HARDWARE LID WILL STORE 2 TRANSMITTERS THREE SLIDE OUT DRAWERS eALSO INCLUDED CONTROL PANEL FUEL PUMP 1 GAL FUEL BOTTLE 1 2V RECHARGABLE NO MAINTENANCE BATTERY ACTUAL SIZE 16 x 16 x 1 P14 Send Check Moiiey Order $16995 0 Shipping & Handling NORTHWEST HOBBY TECHNOLOGIES 322 E St SE Auburn WA 98002 206 939-0884 Seven Lakes HeIDS Out 8x8 lOxlO 10x15 up under 60 seconds Noropes no assemblyl 1 131 RAVENWOOD RD VERSAILLES KY 40383 Letters Continued page 78 session model building flying program youngsters participating Seven Lakes Summer Day-Camp session scheduled morning 9 am about noon first two sessions AN/IA Delta Dart building flying activity sessions usually involve twelve fourteen children between ages eight thirteen third day young people driven flying field Seven Lakes introduced radiocontrolled model airplanes work fly club trainer training cord student transmitter flown altitude about 150 feet slowed down casual speed kids take turn flying interest among excitement level several flew surprisingly well Natural ability becomes evident once thrill sense accomplishment experienced youngster great Summer Day-Camp sponsored Seven Lakes Landowners Association playback parents has 100% positive Publicity local papers further heightens awareness acceptance club benefit community Seven Lakes Aeromodelers chartered four members 1989 now has twenty-two active members Most us retired involvement youngsters delightful experience Perhaps other AMA clubs may wish volunteer help similar day-camp programs communities next summer Raymond Barnes Seven Lakes North Carolina Microhenrys After much deliberation have decided toss two cents worth regarding Microhenrys comic strip little upset upon reading letter gentleman Bronxville NY let pass upon reading letter gentleman Collinsville Illinois sit down begin typing Come guys lighten up think should look back ask yourselves got model aviation begin Whether its RC free flight CL Scale nonscale popular answers question have fun relax enjoy fellowship other fliers Mr Henrys comics help bring some fun out open others can relate wife has read cartoons before can read magazine Shell sit laugh say yep thats right gee honey does guy know what doubt wife shares sentiments think statement comics waste ink insult man great talent humor artistry us can produce comic strip funny true life month think Mr Thomerson owes Mr Henry apology insulting diligent efforts bringing some humor lives hobby Mr Henry keep up good workmost us appreciate Rick Mueller Raymond Washington wish true lot stuffed shirts organization am novice flier such make mistakes results damaged aircraft dont feel great about mistakes nice know others make mistakes Microhenrys am sport enjoyable hobby second job Microhenrys give chuckle over antics Id like see must agree Harding Orren October Letters chopped-up articles find very distracting have search through magazine treasure hunt finish reading article happens too much advertisers lose out since dont take time go back look ads last complaint dont know have changed type cover stock use last three four issues MA have arrived cover ripped quite badly other magazines have arrived just fine leave letter completely negative look forward arrival January1994 95 Inquiries 217-523-0044Toll Free Orders Only 1-800-944-0044 Shipping $575Illinois Residents add 625% TaxVISA MasterCard welcome Z JR HOBBIES 7 BOX 249A NGFIELD IL 62707 MA and read articles geared toward beginners being interest Russ Staska Ketchikan Alaska So thought Microhenrys just myth Well proof live Oklahoma City have dog Ed Henry protrays cartoons wear pith helmets time except maybe January Febmary flying field fly Baxter Field located about 10 miles East Oklahoma City James & Ruby Sanders Oklahoma City Oklahoma thought maybe better write concerning Microhenrys Please keep up good work started flying RC about three years ago always wanted kid couldnt afford day contemplating tax refund decided take plunge bought Golberg Eaglet radio engine joined AMA joined club about order first ran across Microhenrys have admit didnt really like episode guys down shop wife comes down wants know motor weed whacker just about fell chair because laughing hard little bit embarrassing because work time After began develop appreciation Micro-henrys gentle humor strip reflects lot what RC cartoon characters lot like some people club myself As read MA other magazines Ive gotten impression modelers pretty open-minded fun-loving group Unfortunately also few various groups CL FF RC have very narrow strict sense things supposed also tend very vocal about opinions dont think people having fun anymore thats kind sad also very small minority Please ignore keep up good work John S Jensen Minneapolis Minnesota Three-Views Cartoons First would like commend excellent coverage 1992 Schneider Cup reenactment Bob Benjamin great classic event should expanded upon other areas have three entries year Canyon Lake Macchi 67 Matt Pearson Macchi MC72 Richard Pasqueletto Fairey 3C biplane next event will held Nov 12-13-14 Lake Havasu another issue brought up past issues MA concerning Microhenrys still belief three-views aircraft would serve us far better cartoons have offended Mr Henry opinion perhaps will accept apologies What about some quarterscale articles planes constrnction how-to articles Bob Benjamin aircraft cover pictures best covers have seen long time Keep up good work 96 Model Aviation ence Klingherg Canyon Lake California