John Preston__________________________ Safety Comes First Watch may screw loose Whats good RC basic trainer extra careful youre using electric starter TOGETHERNESS number oc casions past few months Ive read newspaper accounts concerning parts full-scale aircraft falling off flight dont believe incidents involved loss life juries certainly potential jury exists critical component such part wing flap separates reported case believe potential injury could also result vital component model airplane shed during flight Back December 1985 issue described incident resulted crash modelers CAP 21 allegedly due engine vibration caus ing self-tapping screws holding aileron servo together loosen during flight December column asked read ers experienced similar problem received letter response However letter arrived just week mentioned different screw-loos ening problem associated servos writers believe much likely occur letter Bob Dolly Wischer write RC Scale column Model Aviation said several columns have men tioned servos have become disassem bled because self-tapping screws have loosened dont know aware true situation have never heard servo cases coming apart really hazardous point watch tiny screw holds output arm servo out put shaft past year have several accidentsor near-accidentsat club field because screws either never installed loosely insert ed worst offenders self-tapping screws crossed slots head Phillips-type screwdrivers driver lifts out slot before screw really tight because modeler doesnt want WI III WELL SON TUE REASON WHY YOU tOwT SEE# r I4AVE C0J%FFL 0UR NEW TRAINE 35 BEAVSL THAT LIP TNERL 33 BIRD.. REAL GIRt YOUR PLANE HIT TH cOUND AL4f 35 MINUTES A&O place excessive force downward mechanism correct assump tion can damaging cure simpledont use Phillips screwdriver cams its way upward out slots Use instead small jewelers screwdriver preferably sharp corners blade tip wont lift out slot much less downward pressure screw can made sufficiently tight will back out engine vibration servo action club members Laser scale model crashed found afterward elevator servo no arm-retaining screw installed few weeks later another modeler experienced erratic ac tion control surfaces ground wing removed search cause found same screws loose several servos Another modeler found screw lying fuselage bottom completely out servo arm tightened properly screws will never come loose have made practice securely tighten screw very instant first serted think doing later time good chance will gotten Just before first flight new model take another look screws After can forgotten response Bobs initial question whether am aware true situa tion regard servo-output-arm-re taming screws answer isYes have witnessed several model crashes due such screws backing out clearly remember least crash screws self-tapping Phillipshead variety couple years before began preaching safety through column checking out model new member club failed check security servoarm-retaining screws lost rudder con trol Sig Kadet spiralled long grass no ailerons minor damage became believer checking screw security Im sure agree Bobs statement once tightened screws other screws mat ter can forgotten think periodic check nuts bolts screws model takes few minutes worthwhile effort Im also advocate using some means lock fasteneers Continued page 16 14 Model Aviation WHEN YOU FORGET OUR UNITS REMEMBER Wet Cell & Gelled Cell Batteries Completely automatic operation Connect forget Pays itself eries last two three times longer Two models fit size batteries REGULAR MODEL$3993 ForteldkrtandsmallPIus$25&H etectnc boat battenesSpecify 612 24V HEAVY DUTY MODEL$4995 sport winch large boat andPlus $2 SOS & H electric power charging batteriesSpecify 6 1 2V CaRa Products PO Box 221 Canton SD 57013 605-987-5924 SASE 0 nomao Deale nqu en ed RC System NiCd Batteries chargers need age Cycler prevent memory Tester Ito rind bad cells Quick Criarger 2 4 hours Trickle charger sate level Field Fast Charger both Rn Tn Portable charger input 1 20V 1 2V Multiple Charger up 3 Tn 5 Rn Completely Automatic STANDARD MODEL$179S5 Fits48VRnand96VlnpacksPlunS5S&H Others available write call One-Speed Dremel Tool Full variable-speed operation Retains on-ott switch inside case Model 270 280 only Plus 51 50S& H FORD FLLVVER NEW 1 48 SCALE PLASTIC MODEL KIT Henry Fords Model T Air 1926 FORD FLIVVER powered French three-cylinder Anzani engine capable 85 miles per hour aircraft exists today Dearborn Michigan Ford Museum KIT FEATURES INJECTION-MOLDED PARTS REHENSIVE INSTRUcTIONS LS FOR MARKINGS GOLDEN AGE SERIES 1LLA1S SEND $2 FOR COMPLETE CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 buried within model can checked after covered screws nuts bolts serve pivot aileron belicranks prime ex ample hidden fasteners cannot periodically checked should fore locked some manner prefer dab epoxy use self-locking Nylock other brand nut subject shedding parts flight dont forget secure hinge pins control surface hinges non-removable dont have worry about falling out some Again can recall time asked perform check first flight beginners model also Sig Kadet During check told builder wasnt impressed security hingepins installed elevator rudder hinges After assured made secure attempt ed first flight guessed hinge pins rudder fell out second time watched Kadet spiral long grass essentially no damage case wondering yes recommend Sig Kadet first model newcomer hobby Which brings another subject What models good trainers beginners got RC part hobby result bumping Hurst Bowers AMA museum curator local hobby store back 1968 trip hobby store purchase balsa covering material repair Comet rubber-pow ered Free Right model built son time four years old OK admit built Comet kit myself using son excuse Anyway cut long story short found Hurst Mr Scale Washington DC area time As result first RC model scale modelan Aeronca Tandem Did hear someone say bad choice first RC model Actually since plans Hurst lent build model intended Class B Gas Scale model Free Flight Ohlsson 23 power perfect choice soloed model during second trip flying field Perhaps word solo misnomer technique flying treat Free Right model using radio keep flying away Galloping Ghost radio Controllaire now World Engines meant hand-launched wouldnt touch stick GG radios stick until enough altitude prevent mistaken command pilot causing its demise Landings always made dead-stick since throttle control never worked worth hoot Aeronca Clark-V airfoil lots dihedral also slow flier Cox 09 power gave its pilot time Continued page 18 16 Model Aviation BYRON ideo ~JORIGINALS 7NewTape Show Season 85 Featuring Product Information Jet Rally 85 Fun Fly 85 STRIKING BACK Thousands have enjoyed 1984 tape featuring exciting WWII Air Battle Reenactment Additions new tape include C-47s exciting paratroop assault e tanks fabulous 1/5 Air Force Action For personal copy send $2500 Byron Originals Box 279 Grove IA 51445 12-364-3165 Please specify VHS Beta Format EU~UEEEEEENuENuuuuu U sT6QuALmr FUELS * Special Igniters improve cold starting idle characteristics * High Film Strength Additives increase lubricity provide maximum lean run protection * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion U FREIGHT U COLLECT I55 GAL DRUM I$19000 I$25800 $32500 $38500 $52000U $66000 PINT QUART GALLON 0% Nitromethane$315$450$1050 5% Nitromethane$365$525$1250 10% Nitromethane$415$550$1450 15% Nitromethane$430$625$1650 25% Nitromethane$495$750$2095 35% Nitromethane$575$875$2495 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane $415$550$1395$29500 15% Nitromethane $425$625$1595$35900 THE CHOICE OF CHAMPION FLYERSU E Fo ove 20 yea s SIG has blending fuel finest quality ingredients available coho 9955 Pu e very best grade available nitromethane use 100% pure get honest U portion based % volume maximum lubrication get perfect 50/50 blend Bake s AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest qua ty fue can made price Dont take word try some ludge yourself See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 S bjox h ewthext nets * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pk/2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine FITS MOST ENGINES 25 UP $225 $225 $195 $195 SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO lAdd 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 U U U U U U U U U U U U U U U U SIG CHAMPION 2-STROKE FUEL FREE SHIPPING ON ORDERS OVER $1500 think attributes feel make good trainer beginning modeler Unfortunately multi tude so-called trainers market have qualities other words basic trainers ad vanced trainers Again unfortunately some latter models peddled designers/manufacturers perfect beginner couple years ago received letter Jim Connor modeler Horse Heads NY Jim spotted advertise ments so-called RC trainer models engines up 35 cu in Christ mas catalogs two major national retail department stores advertisements accompanied warnings statements about seeking help experienced flier before attempting first flight Jim also enclosed advertisement clipped model magazine captioned .an RC trainer can flown beginner instruc tor ad went say model .. will take off fly itself land itself beginner built fairly well some imaginary flights before actual first flight will probably have no problems soloing model first RC flight picture accompanied ad pos sible model would capable flying itselfU rigged correctly Jim fellow modelers feel ad slap face safety poor taste Another modeler Jim Waterman San Antonio TX expressed opinions concerning trainer models Guest Editorial April 1985 issue Model Aviation must have read because editor note September 1985 issue stated Jims guest editorial kicked off flurry mail offices Apparently wrote agreed Jims views happen similar views Ive just expressed column Perhaps some questioning feel selection right type trainer first model has bearing flight safety response opinion number crashes due purely simply fact model got ahead its pilot statement mean pilot lost control because model required control responses beyond capabilities clubs have semi-formal flight training program new members past Safety columns have discussed such programs expressed views what basic maneuvers should demon strated before beginner can con sidered competent flier turned loose instructor However have yet see ny recommendations choice first model flighttraining programs think youll agree would foolhardy stick neck out column publish Continued page 20 18 Model Aviation U U U U U U U U U U U U U I U U U U U U U U U U U U U U HOBBY HAMMER *9 95 APPROx LENGTh 7%Extra Tip INCLUDES*125 Steel Brass n Tip ISpecify extra tip orderingl Send Check Money Order M & W MODELS P0 Box 6627 Huntington Beech CA 92615 17149621703 Add iSOfor Post & Hand CA Rex add 6% tax O@O@00000@O@O@O@O@O@OOO@OO VIDEO PROGRAMS IVluIcDu Way 18 UP presents B eath Tak ng Aresti arid Formation Aerobatics Performed World Reknossn Celebrities Bob Hoover Leo OCsPA Loudenslariger Canadian Snowbirds Eagles French Conection Warbirds & Others Special Interviews Exciting Music Good Picture QSharp Editing Lots Profes sIonal Toucb Running time 70 mm Price S4795 LEARN TO BUILDVHS & BETA 0 LEARN TO FLYRENT BuY IBASIC CONSTRUCTION FOR BEGINNERS IN R/C 107 Miii 4995 BASIC FUGHT TRAING FOR BEGINNERS IN R/C65 Miii 4495 3ThE WORLD OF MODEL AVIATION iii 4495 4OSHIOSI4 OVERVIEW55 Mlii 3996 6 US SCALE MASTERS CHAMPIONSHIPS. 60 Mlii 4195 AIRPLANE pjc30 Mm 399 0 07 WARBIRDS IN ACTION FuN Scale Air Shows & Morel . 75 Mlii 4995 S LHOPPINIVeIeOyI Model& FuN Scale4SMIIS 4195 0 soles final prices subject change please check cwve,t ads Jar rites YJ ORDERING INFORMATION Please Read Carefully AvoId Delays RENTAL DEPOSIT full purchase price EACH program ordered dfference ir refunded RENTAL DfJIATION week after delivery Reserved dates require IS day notice 0 PAYMENT Check 10 day clearance money order Charge Orders Include Cmd ration j Date Phone COOs available phone — SHIPPING $375 ForeIgn Canada add 10% TOTAL others add 15% IL res add 7% tao0 0 V SEND ORDERS T ACADEMY OF AVIATION RESEARCH & DEVELOPMENTs P0 BOX 277 0 HAZEL CREST ILLINOIS 60429 0277 0 3123350776 10am 8pm Mon Sat 000000000000000000000 Designed ut yaw hand trand flexible steai xabta leaders e tuck cant slip set tar nesirsi etevatar tuet-resistant plastic Strong pretested pretarmed loops Excaltenr iraining handle Na 400 0 11 Thin snique combination reel con irol handla mate world iamous Wather U-Central System ureely molded raugh tact proot styrese adjustable brake makes possible ix change vaur ilying radius during tlight satety tack prevents accidental sickening tines qualifies s-reely tar contest tlying Comes 70 met si multistrand stainless steel cable either 015 018 No 015 $1800 e No giB 0 Throttle 3Line Control 0rc04r~ Handle Unit I-ugh impact durable plastic rugged precision mechanism will last ior yearsready tar use INa storaae linesl No 701 0 Dellcrank 3 LIne Engine Speed Plane Unit Heavy Duty Upright Unit mounting tap ot supports sorb motor mounts beams etc No702 0 Sospendad Unit maunting models requiring contral unit ta bolted under control support No 703 $800 list trainers can recommend ltd sure miss some good ones have manufacturers come after proverbial axe Im curious learn whether clubs have information packets beginners mention suitable model choices years ago participated number shopping mall displays put club time Northern Virginia Radio Control Club first displays found common question much does cost get started what model recommend future displays one-page infor mation sheet hand out response such questions sheet listed several models brand name club members agreed easy fly Something did feel also worthwhile suggest models advanced trainers suitable recently-soloed club member Its possible greater risk accident beginner soloes considers himself qualified fly modelincluding latest hot Pattern ship thoughts ramblings would appreciated may have seen advertisement recent issues Model Aviation new company goes name Pelican Enterprises Inc owner com pany Terrence Surma recently sent catalog items selling concern safety particu larly caught eye CyA Mask Pelican clalms mask .. vides dependable filtering concentra tions fumes cyanoacrylate glue up 1000 ppm know number readers have experienced discomfort some cases ill health used cyanoacrylate CyA glue areas poor ventilation among sufferers might want contact Pelican order mask sells $1247 plus $350 shipping As say ad mask thats cheaper hospital visit catalog free can obtained Pelican Enterprises Inc 265 Ox ford Lane Bloomingdale IL 60108 Tell sent couple issues back mentioned accident occurred modeler attempted use electric starter model equipped spin ner incident starter got offcenter shattered prop sending piece blade modelers chest Another rather unusual incident involving electric starter described December 1985 newsletter Amarillo Radio Kontrol Society ARKS News editor stated Under title SAFETY read guess now us have heard Continued page 139 E-Z JUST U Control Handles Control Handle 208-362 5205 Idaho 63707 AfaSiAftSso Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0
Edition: Model Aviation - 1986/05
Page Numbers: 14, 16, 18, 20, 139
John Preston__________________________ Safety Comes First Watch may screw loose Whats good RC basic trainer extra careful youre using electric starter TOGETHERNESS number oc casions past few months Ive read newspaper accounts concerning parts full-scale aircraft falling off flight dont believe incidents involved loss life juries certainly potential jury exists critical component such part wing flap separates reported case believe potential injury could also result vital component model airplane shed during flight Back December 1985 issue described incident resulted crash modelers CAP 21 allegedly due engine vibration caus ing self-tapping screws holding aileron servo together loosen during flight December column asked read ers experienced similar problem received letter response However letter arrived just week mentioned different screw-loos ening problem associated servos writers believe much likely occur letter Bob Dolly Wischer write RC Scale column Model Aviation said several columns have men tioned servos have become disassem bled because self-tapping screws have loosened dont know aware true situation have never heard servo cases coming apart really hazardous point watch tiny screw holds output arm servo out put shaft past year have several accidentsor near-accidentsat club field because screws either never installed loosely insert ed worst offenders self-tapping screws crossed slots head Phillips-type screwdrivers driver lifts out slot before screw really tight because modeler doesnt want WI III WELL SON TUE REASON WHY YOU tOwT SEE# r I4AVE C0J%FFL 0UR NEW TRAINE 35 BEAVSL THAT LIP TNERL 33 BIRD.. REAL GIRt YOUR PLANE HIT TH cOUND AL4f 35 MINUTES A&O place excessive force downward mechanism correct assump tion can damaging cure simpledont use Phillips screwdriver cams its way upward out slots Use instead small jewelers screwdriver preferably sharp corners blade tip wont lift out slot much less downward pressure screw can made sufficiently tight will back out engine vibration servo action club members Laser scale model crashed found afterward elevator servo no arm-retaining screw installed few weeks later another modeler experienced erratic ac tion control surfaces ground wing removed search cause found same screws loose several servos Another modeler found screw lying fuselage bottom completely out servo arm tightened properly screws will never come loose have made practice securely tighten screw very instant first serted think doing later time good chance will gotten Just before first flight new model take another look screws After can forgotten response Bobs initial question whether am aware true situa tion regard servo-output-arm-re taming screws answer isYes have witnessed several model crashes due such screws backing out clearly remember least crash screws self-tapping Phillipshead variety couple years before began preaching safety through column checking out model new member club failed check security servoarm-retaining screws lost rudder con trol Sig Kadet spiralled long grass no ailerons minor damage became believer checking screw security Im sure agree Bobs statement once tightened screws other screws mat ter can forgotten think periodic check nuts bolts screws model takes few minutes worthwhile effort Im also advocate using some means lock fasteneers Continued page 16 14 Model Aviation WHEN YOU FORGET OUR UNITS REMEMBER Wet Cell & Gelled Cell Batteries Completely automatic operation Connect forget Pays itself eries last two three times longer Two models fit size batteries REGULAR MODEL$3993 ForteldkrtandsmallPIus$25&H etectnc boat battenesSpecify 612 24V HEAVY DUTY MODEL$4995 sport winch large boat andPlus $2 SOS & H electric power charging batteriesSpecify 6 1 2V CaRa Products PO Box 221 Canton SD 57013 605-987-5924 SASE 0 nomao Deale nqu en ed RC System NiCd Batteries chargers need age Cycler prevent memory Tester Ito rind bad cells Quick Criarger 2 4 hours Trickle charger sate level Field Fast Charger both Rn Tn Portable charger input 1 20V 1 2V Multiple Charger up 3 Tn 5 Rn Completely Automatic STANDARD MODEL$179S5 Fits48VRnand96VlnpacksPlunS5S&H Others available write call One-Speed Dremel Tool Full variable-speed operation Retains on-ott switch inside case Model 270 280 only Plus 51 50S& H FORD FLLVVER NEW 1 48 SCALE PLASTIC MODEL KIT Henry Fords Model T Air 1926 FORD FLIVVER powered French three-cylinder Anzani engine capable 85 miles per hour aircraft exists today Dearborn Michigan Ford Museum KIT FEATURES INJECTION-MOLDED PARTS REHENSIVE INSTRUcTIONS LS FOR MARKINGS GOLDEN AGE SERIES 1LLA1S SEND $2 FOR COMPLETE CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 buried within model can checked after covered screws nuts bolts serve pivot aileron belicranks prime ex ample hidden fasteners cannot periodically checked should fore locked some manner prefer dab epoxy use self-locking Nylock other brand nut subject shedding parts flight dont forget secure hinge pins control surface hinges non-removable dont have worry about falling out some Again can recall time asked perform check first flight beginners model also Sig Kadet During check told builder wasnt impressed security hingepins installed elevator rudder hinges After assured made secure attempt ed first flight guessed hinge pins rudder fell out second time watched Kadet spiral long grass essentially no damage case wondering yes recommend Sig Kadet first model newcomer hobby Which brings another subject What models good trainers beginners got RC part hobby result bumping Hurst Bowers AMA museum curator local hobby store back 1968 trip hobby store purchase balsa covering material repair Comet rubber-pow ered Free Right model built son time four years old OK admit built Comet kit myself using son excuse Anyway cut long story short found Hurst Mr Scale Washington DC area time As result first RC model scale modelan Aeronca Tandem Did hear someone say bad choice first RC model Actually since plans Hurst lent build model intended Class B Gas Scale model Free Flight Ohlsson 23 power perfect choice soloed model during second trip flying field Perhaps word solo misnomer technique flying treat Free Right model using radio keep flying away Galloping Ghost radio Controllaire now World Engines meant hand-launched wouldnt touch stick GG radios stick until enough altitude prevent mistaken command pilot causing its demise Landings always made dead-stick since throttle control never worked worth hoot Aeronca Clark-V airfoil lots dihedral also slow flier Cox 09 power gave its pilot time Continued page 18 16 Model Aviation BYRON ideo ~JORIGINALS 7NewTape Show Season 85 Featuring Product Information Jet Rally 85 Fun Fly 85 STRIKING BACK Thousands have enjoyed 1984 tape featuring exciting WWII Air Battle Reenactment Additions new tape include C-47s exciting paratroop assault e tanks fabulous 1/5 Air Force Action For personal copy send $2500 Byron Originals Box 279 Grove IA 51445 12-364-3165 Please specify VHS Beta Format EU~UEEEEEENuENuuuuu U sT6QuALmr FUELS * Special Igniters improve cold starting idle characteristics * High Film Strength Additives increase lubricity provide maximum lean run protection * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion U FREIGHT U COLLECT I55 GAL DRUM I$19000 I$25800 $32500 $38500 $52000U $66000 PINT QUART GALLON 0% Nitromethane$315$450$1050 5% Nitromethane$365$525$1250 10% Nitromethane$415$550$1450 15% Nitromethane$430$625$1650 25% Nitromethane$495$750$2095 35% Nitromethane$575$875$2495 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane $415$550$1395$29500 15% Nitromethane $425$625$1595$35900 THE CHOICE OF CHAMPION FLYERSU E Fo ove 20 yea s SIG has blending fuel finest quality ingredients available coho 9955 Pu e very best grade available nitromethane use 100% pure get honest U portion based % volume maximum lubrication get perfect 50/50 blend Bake s AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest qua ty fue can made price Dont take word try some ludge yourself See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 S bjox h ewthext nets * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pk/2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine FITS MOST ENGINES 25 UP $225 $225 $195 $195 SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO lAdd 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 U U U U U U U U U U U U U U U U SIG CHAMPION 2-STROKE FUEL FREE SHIPPING ON ORDERS OVER $1500 think attributes feel make good trainer beginning modeler Unfortunately multi tude so-called trainers market have qualities other words basic trainers ad vanced trainers Again unfortunately some latter models peddled designers/manufacturers perfect beginner couple years ago received letter Jim Connor modeler Horse Heads NY Jim spotted advertise ments so-called RC trainer models engines up 35 cu in Christ mas catalogs two major national retail department stores advertisements accompanied warnings statements about seeking help experienced flier before attempting first flight Jim also enclosed advertisement clipped model magazine captioned .an RC trainer can flown beginner instruc tor ad went say model .. will take off fly itself land itself beginner built fairly well some imaginary flights before actual first flight will probably have no problems soloing model first RC flight picture accompanied ad pos sible model would capable flying itselfU rigged correctly Jim fellow modelers feel ad slap face safety poor taste Another modeler Jim Waterman San Antonio TX expressed opinions concerning trainer models Guest Editorial April 1985 issue Model Aviation must have read because editor note September 1985 issue stated Jims guest editorial kicked off flurry mail offices Apparently wrote agreed Jims views happen similar views Ive just expressed column Perhaps some questioning feel selection right type trainer first model has bearing flight safety response opinion number crashes due purely simply fact model got ahead its pilot statement mean pilot lost control because model required control responses beyond capabilities clubs have semi-formal flight training program new members past Safety columns have discussed such programs expressed views what basic maneuvers should demon strated before beginner can con sidered competent flier turned loose instructor However have yet see ny recommendations choice first model flighttraining programs think youll agree would foolhardy stick neck out column publish Continued page 20 18 Model Aviation U U U U U U U U U U U U U I U U U U U U U U U U U U U U HOBBY HAMMER *9 95 APPROx LENGTh 7%Extra Tip INCLUDES*125 Steel Brass n Tip ISpecify extra tip orderingl Send Check Money Order M & W MODELS P0 Box 6627 Huntington Beech CA 92615 17149621703 Add iSOfor Post & Hand CA Rex add 6% tax O@O@00000@O@O@O@O@O@OOO@OO VIDEO PROGRAMS IVluIcDu Way 18 UP presents B eath Tak ng Aresti arid Formation Aerobatics Performed World Reknossn Celebrities Bob Hoover Leo OCsPA Loudenslariger Canadian Snowbirds Eagles French Conection Warbirds & Others Special Interviews Exciting Music Good Picture QSharp Editing Lots Profes sIonal Toucb Running time 70 mm Price S4795 LEARN TO BUILDVHS & BETA 0 LEARN TO FLYRENT BuY IBASIC CONSTRUCTION FOR BEGINNERS IN R/C 107 Miii 4995 BASIC FUGHT TRAING FOR BEGINNERS IN R/C65 Miii 4495 3ThE WORLD OF MODEL AVIATION iii 4495 4OSHIOSI4 OVERVIEW55 Mlii 3996 6 US SCALE MASTERS CHAMPIONSHIPS. 60 Mlii 4195 AIRPLANE pjc30 Mm 399 0 07 WARBIRDS IN ACTION FuN Scale Air Shows & Morel . 75 Mlii 4995 S LHOPPINIVeIeOyI Model& FuN Scale4SMIIS 4195 0 soles final prices subject change please check cwve,t ads Jar rites YJ ORDERING INFORMATION Please Read Carefully AvoId Delays RENTAL DEPOSIT full purchase price EACH program ordered dfference ir refunded RENTAL DfJIATION week after delivery Reserved dates require IS day notice 0 PAYMENT Check 10 day clearance money order Charge Orders Include Cmd ration j Date Phone COOs available phone — SHIPPING $375 ForeIgn Canada add 10% TOTAL others add 15% IL res add 7% tao0 0 V SEND ORDERS T ACADEMY OF AVIATION RESEARCH & DEVELOPMENTs P0 BOX 277 0 HAZEL CREST ILLINOIS 60429 0277 0 3123350776 10am 8pm Mon Sat 000000000000000000000 Designed ut yaw hand trand flexible steai xabta leaders e tuck cant slip set tar nesirsi etevatar tuet-resistant plastic Strong pretested pretarmed loops Excaltenr iraining handle Na 400 0 11 Thin snique combination reel con irol handla mate world iamous Wather U-Central System ureely molded raugh tact proot styrese adjustable brake makes possible ix change vaur ilying radius during tlight satety tack prevents accidental sickening tines qualifies s-reely tar contest tlying Comes 70 met si multistrand stainless steel cable either 015 018 No 015 $1800 e No giB 0 Throttle 3Line Control 0rc04r~ Handle Unit I-ugh impact durable plastic rugged precision mechanism will last ior yearsready tar use INa storaae linesl No 701 0 Dellcrank 3 LIne Engine Speed Plane Unit Heavy Duty Upright Unit mounting tap ot supports sorb motor mounts beams etc No702 0 Sospendad Unit maunting models requiring contral unit ta bolted under control support No 703 $800 list trainers can recommend ltd sure miss some good ones have manufacturers come after proverbial axe Im curious learn whether clubs have information packets beginners mention suitable model choices years ago participated number shopping mall displays put club time Northern Virginia Radio Control Club first displays found common question much does cost get started what model recommend future displays one-page infor mation sheet hand out response such questions sheet listed several models brand name club members agreed easy fly Something did feel also worthwhile suggest models advanced trainers suitable recently-soloed club member Its possible greater risk accident beginner soloes considers himself qualified fly modelincluding latest hot Pattern ship thoughts ramblings would appreciated may have seen advertisement recent issues Model Aviation new company goes name Pelican Enterprises Inc owner com pany Terrence Surma recently sent catalog items selling concern safety particu larly caught eye CyA Mask Pelican clalms mask .. vides dependable filtering concentra tions fumes cyanoacrylate glue up 1000 ppm know number readers have experienced discomfort some cases ill health used cyanoacrylate CyA glue areas poor ventilation among sufferers might want contact Pelican order mask sells $1247 plus $350 shipping As say ad mask thats cheaper hospital visit catalog free can obtained Pelican Enterprises Inc 265 Ox ford Lane Bloomingdale IL 60108 Tell sent couple issues back mentioned accident occurred modeler attempted use electric starter model equipped spin ner incident starter got offcenter shattered prop sending piece blade modelers chest Another rather unusual incident involving electric starter described December 1985 newsletter Amarillo Radio Kontrol Society ARKS News editor stated Under title SAFETY read guess now us have heard Continued page 139 E-Z JUST U Control Handles Control Handle 208-362 5205 Idaho 63707 AfaSiAftSso Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0
Edition: Model Aviation - 1986/05
Page Numbers: 14, 16, 18, 20, 139
John Preston__________________________ Safety Comes First Watch may screw loose Whats good RC basic trainer extra careful youre using electric starter TOGETHERNESS number oc casions past few months Ive read newspaper accounts concerning parts full-scale aircraft falling off flight dont believe incidents involved loss life juries certainly potential jury exists critical component such part wing flap separates reported case believe potential injury could also result vital component model airplane shed during flight Back December 1985 issue described incident resulted crash modelers CAP 21 allegedly due engine vibration caus ing self-tapping screws holding aileron servo together loosen during flight December column asked read ers experienced similar problem received letter response However letter arrived just week mentioned different screw-loos ening problem associated servos writers believe much likely occur letter Bob Dolly Wischer write RC Scale column Model Aviation said several columns have men tioned servos have become disassem bled because self-tapping screws have loosened dont know aware true situation have never heard servo cases coming apart really hazardous point watch tiny screw holds output arm servo out put shaft past year have several accidentsor near-accidentsat club field because screws either never installed loosely insert ed worst offenders self-tapping screws crossed slots head Phillips-type screwdrivers driver lifts out slot before screw really tight because modeler doesnt want WI III WELL SON TUE REASON WHY YOU tOwT SEE# r I4AVE C0J%FFL 0UR NEW TRAINE 35 BEAVSL THAT LIP TNERL 33 BIRD.. REAL GIRt YOUR PLANE HIT TH cOUND AL4f 35 MINUTES A&O place excessive force downward mechanism correct assump tion can damaging cure simpledont use Phillips screwdriver cams its way upward out slots Use instead small jewelers screwdriver preferably sharp corners blade tip wont lift out slot much less downward pressure screw can made sufficiently tight will back out engine vibration servo action club members Laser scale model crashed found afterward elevator servo no arm-retaining screw installed few weeks later another modeler experienced erratic ac tion control surfaces ground wing removed search cause found same screws loose several servos Another modeler found screw lying fuselage bottom completely out servo arm tightened properly screws will never come loose have made practice securely tighten screw very instant first serted think doing later time good chance will gotten Just before first flight new model take another look screws After can forgotten response Bobs initial question whether am aware true situa tion regard servo-output-arm-re taming screws answer isYes have witnessed several model crashes due such screws backing out clearly remember least crash screws self-tapping Phillipshead variety couple years before began preaching safety through column checking out model new member club failed check security servoarm-retaining screws lost rudder con trol Sig Kadet spiralled long grass no ailerons minor damage became believer checking screw security Im sure agree Bobs statement once tightened screws other screws mat ter can forgotten think periodic check nuts bolts screws model takes few minutes worthwhile effort Im also advocate using some means lock fasteneers Continued page 16 14 Model Aviation WHEN YOU FORGET OUR UNITS REMEMBER Wet Cell & Gelled Cell Batteries Completely automatic operation Connect forget Pays itself eries last two three times longer Two models fit size batteries REGULAR MODEL$3993 ForteldkrtandsmallPIus$25&H etectnc boat battenesSpecify 612 24V HEAVY DUTY MODEL$4995 sport winch large boat andPlus $2 SOS & H electric power charging batteriesSpecify 6 1 2V CaRa Products PO Box 221 Canton SD 57013 605-987-5924 SASE 0 nomao Deale nqu en ed RC System NiCd Batteries chargers need age Cycler prevent memory Tester Ito rind bad cells Quick Criarger 2 4 hours Trickle charger sate level Field Fast Charger both Rn Tn Portable charger input 1 20V 1 2V Multiple Charger up 3 Tn 5 Rn Completely Automatic STANDARD MODEL$179S5 Fits48VRnand96VlnpacksPlunS5S&H Others available write call One-Speed Dremel Tool Full variable-speed operation Retains on-ott switch inside case Model 270 280 only Plus 51 50S& H FORD FLLVVER NEW 1 48 SCALE PLASTIC MODEL KIT Henry Fords Model T Air 1926 FORD FLIVVER powered French three-cylinder Anzani engine capable 85 miles per hour aircraft exists today Dearborn Michigan Ford Museum KIT FEATURES INJECTION-MOLDED PARTS REHENSIVE INSTRUcTIONS LS FOR MARKINGS GOLDEN AGE SERIES 1LLA1S SEND $2 FOR COMPLETE CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 buried within model can checked after covered screws nuts bolts serve pivot aileron belicranks prime ex ample hidden fasteners cannot periodically checked should fore locked some manner prefer dab epoxy use self-locking Nylock other brand nut subject shedding parts flight dont forget secure hinge pins control surface hinges non-removable dont have worry about falling out some Again can recall time asked perform check first flight beginners model also Sig Kadet During check told builder wasnt impressed security hingepins installed elevator rudder hinges After assured made secure attempt ed first flight guessed hinge pins rudder fell out second time watched Kadet spiral long grass essentially no damage case wondering yes recommend Sig Kadet first model newcomer hobby Which brings another subject What models good trainers beginners got RC part hobby result bumping Hurst Bowers AMA museum curator local hobby store back 1968 trip hobby store purchase balsa covering material repair Comet rubber-pow ered Free Right model built son time four years old OK admit built Comet kit myself using son excuse Anyway cut long story short found Hurst Mr Scale Washington DC area time As result first RC model scale modelan Aeronca Tandem Did hear someone say bad choice first RC model Actually since plans Hurst lent build model intended Class B Gas Scale model Free Flight Ohlsson 23 power perfect choice soloed model during second trip flying field Perhaps word solo misnomer technique flying treat Free Right model using radio keep flying away Galloping Ghost radio Controllaire now World Engines meant hand-launched wouldnt touch stick GG radios stick until enough altitude prevent mistaken command pilot causing its demise Landings always made dead-stick since throttle control never worked worth hoot Aeronca Clark-V airfoil lots dihedral also slow flier Cox 09 power gave its pilot time Continued page 18 16 Model Aviation BYRON ideo ~JORIGINALS 7NewTape Show Season 85 Featuring Product Information Jet Rally 85 Fun Fly 85 STRIKING BACK Thousands have enjoyed 1984 tape featuring exciting WWII Air Battle Reenactment Additions new tape include C-47s exciting paratroop assault e tanks fabulous 1/5 Air Force Action For personal copy send $2500 Byron Originals Box 279 Grove IA 51445 12-364-3165 Please specify VHS Beta Format EU~UEEEEEENuENuuuuu U sT6QuALmr FUELS * Special Igniters improve cold starting idle characteristics * High Film Strength Additives increase lubricity provide maximum lean run protection * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion U FREIGHT U COLLECT I55 GAL DRUM I$19000 I$25800 $32500 $38500 $52000U $66000 PINT QUART GALLON 0% Nitromethane$315$450$1050 5% Nitromethane$365$525$1250 10% Nitromethane$415$550$1450 15% Nitromethane$430$625$1650 25% Nitromethane$495$750$2095 35% Nitromethane$575$875$2495 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane $415$550$1395$29500 15% Nitromethane $425$625$1595$35900 THE CHOICE OF CHAMPION FLYERSU E Fo ove 20 yea s SIG has blending fuel finest quality ingredients available coho 9955 Pu e very best grade available nitromethane use 100% pure get honest U portion based % volume maximum lubrication get perfect 50/50 blend Bake s AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest qua ty fue can made price Dont take word try some ludge yourself See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 S bjox h ewthext nets * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pk/2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine FITS MOST ENGINES 25 UP $225 $225 $195 $195 SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO lAdd 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 U U U U U U U U U U U U U U U U SIG CHAMPION 2-STROKE FUEL FREE SHIPPING ON ORDERS OVER $1500 think attributes feel make good trainer beginning modeler Unfortunately multi tude so-called trainers market have qualities other words basic trainers ad vanced trainers Again unfortunately some latter models peddled designers/manufacturers perfect beginner couple years ago received letter Jim Connor modeler Horse Heads NY Jim spotted advertise ments so-called RC trainer models engines up 35 cu in Christ mas catalogs two major national retail department stores advertisements accompanied warnings statements about seeking help experienced flier before attempting first flight Jim also enclosed advertisement clipped model magazine captioned .an RC trainer can flown beginner instruc tor ad went say model .. will take off fly itself land itself beginner built fairly well some imaginary flights before actual first flight will probably have no problems soloing model first RC flight picture accompanied ad pos sible model would capable flying itselfU rigged correctly Jim fellow modelers feel ad slap face safety poor taste Another modeler Jim Waterman San Antonio TX expressed opinions concerning trainer models Guest Editorial April 1985 issue Model Aviation must have read because editor note September 1985 issue stated Jims guest editorial kicked off flurry mail offices Apparently wrote agreed Jims views happen similar views Ive just expressed column Perhaps some questioning feel selection right type trainer first model has bearing flight safety response opinion number crashes due purely simply fact model got ahead its pilot statement mean pilot lost control because model required control responses beyond capabilities clubs have semi-formal flight training program new members past Safety columns have discussed such programs expressed views what basic maneuvers should demon strated before beginner can con sidered competent flier turned loose instructor However have yet see ny recommendations choice first model flighttraining programs think youll agree would foolhardy stick neck out column publish Continued page 20 18 Model Aviation U U U U U U U U U U U U U I U U U U U U U U U U U U U U HOBBY HAMMER *9 95 APPROx LENGTh 7%Extra Tip INCLUDES*125 Steel Brass n Tip ISpecify extra tip orderingl Send Check Money Order M & W MODELS P0 Box 6627 Huntington Beech CA 92615 17149621703 Add iSOfor Post & Hand CA Rex add 6% tax O@O@00000@O@O@O@O@O@OOO@OO VIDEO PROGRAMS IVluIcDu Way 18 UP presents B eath Tak ng Aresti arid Formation Aerobatics Performed World Reknossn Celebrities Bob Hoover Leo OCsPA Loudenslariger Canadian Snowbirds Eagles French Conection Warbirds & Others Special Interviews Exciting Music Good Picture QSharp Editing Lots Profes sIonal Toucb Running time 70 mm Price S4795 LEARN TO BUILDVHS & BETA 0 LEARN TO FLYRENT BuY IBASIC CONSTRUCTION FOR BEGINNERS IN R/C 107 Miii 4995 BASIC FUGHT TRAING FOR BEGINNERS IN R/C65 Miii 4495 3ThE WORLD OF MODEL AVIATION iii 4495 4OSHIOSI4 OVERVIEW55 Mlii 3996 6 US SCALE MASTERS CHAMPIONSHIPS. 60 Mlii 4195 AIRPLANE pjc30 Mm 399 0 07 WARBIRDS IN ACTION FuN Scale Air Shows & Morel . 75 Mlii 4995 S LHOPPINIVeIeOyI Model& FuN Scale4SMIIS 4195 0 soles final prices subject change please check cwve,t ads Jar rites YJ ORDERING INFORMATION Please Read Carefully AvoId Delays RENTAL DEPOSIT full purchase price EACH program ordered dfference ir refunded RENTAL DfJIATION week after delivery Reserved dates require IS day notice 0 PAYMENT Check 10 day clearance money order Charge Orders Include Cmd ration j Date Phone COOs available phone — SHIPPING $375 ForeIgn Canada add 10% TOTAL others add 15% IL res add 7% tao0 0 V SEND ORDERS T ACADEMY OF AVIATION RESEARCH & DEVELOPMENTs P0 BOX 277 0 HAZEL CREST ILLINOIS 60429 0277 0 3123350776 10am 8pm Mon Sat 000000000000000000000 Designed ut yaw hand trand flexible steai xabta leaders e tuck cant slip set tar nesirsi etevatar tuet-resistant plastic Strong pretested pretarmed loops Excaltenr iraining handle Na 400 0 11 Thin snique combination reel con irol handla mate world iamous Wather U-Central System ureely molded raugh tact proot styrese adjustable brake makes possible ix change vaur ilying radius during tlight satety tack prevents accidental sickening tines qualifies s-reely tar contest tlying Comes 70 met si multistrand stainless steel cable either 015 018 No 015 $1800 e No giB 0 Throttle 3Line Control 0rc04r~ Handle Unit I-ugh impact durable plastic rugged precision mechanism will last ior yearsready tar use INa storaae linesl No 701 0 Dellcrank 3 LIne Engine Speed Plane Unit Heavy Duty Upright Unit mounting tap ot supports sorb motor mounts beams etc No702 0 Sospendad Unit maunting models requiring contral unit ta bolted under control support No 703 $800 list trainers can recommend ltd sure miss some good ones have manufacturers come after proverbial axe Im curious learn whether clubs have information packets beginners mention suitable model choices years ago participated number shopping mall displays put club time Northern Virginia Radio Control Club first displays found common question much does cost get started what model recommend future displays one-page infor mation sheet hand out response such questions sheet listed several models brand name club members agreed easy fly Something did feel also worthwhile suggest models advanced trainers suitable recently-soloed club member Its possible greater risk accident beginner soloes considers himself qualified fly modelincluding latest hot Pattern ship thoughts ramblings would appreciated may have seen advertisement recent issues Model Aviation new company goes name Pelican Enterprises Inc owner com pany Terrence Surma recently sent catalog items selling concern safety particu larly caught eye CyA Mask Pelican clalms mask .. vides dependable filtering concentra tions fumes cyanoacrylate glue up 1000 ppm know number readers have experienced discomfort some cases ill health used cyanoacrylate CyA glue areas poor ventilation among sufferers might want contact Pelican order mask sells $1247 plus $350 shipping As say ad mask thats cheaper hospital visit catalog free can obtained Pelican Enterprises Inc 265 Ox ford Lane Bloomingdale IL 60108 Tell sent couple issues back mentioned accident occurred modeler attempted use electric starter model equipped spin ner incident starter got offcenter shattered prop sending piece blade modelers chest Another rather unusual incident involving electric starter described December 1985 newsletter Amarillo Radio Kontrol Society ARKS News editor stated Under title SAFETY read guess now us have heard Continued page 139 E-Z JUST U Control Handles Control Handle 208-362 5205 Idaho 63707 AfaSiAftSso Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0
Edition: Model Aviation - 1986/05
Page Numbers: 14, 16, 18, 20, 139
John Preston__________________________ Safety Comes First Watch may screw loose Whats good RC basic trainer extra careful youre using electric starter TOGETHERNESS number oc casions past few months Ive read newspaper accounts concerning parts full-scale aircraft falling off flight dont believe incidents involved loss life juries certainly potential jury exists critical component such part wing flap separates reported case believe potential injury could also result vital component model airplane shed during flight Back December 1985 issue described incident resulted crash modelers CAP 21 allegedly due engine vibration caus ing self-tapping screws holding aileron servo together loosen during flight December column asked read ers experienced similar problem received letter response However letter arrived just week mentioned different screw-loos ening problem associated servos writers believe much likely occur letter Bob Dolly Wischer write RC Scale column Model Aviation said several columns have men tioned servos have become disassem bled because self-tapping screws have loosened dont know aware true situation have never heard servo cases coming apart really hazardous point watch tiny screw holds output arm servo out put shaft past year have several accidentsor near-accidentsat club field because screws either never installed loosely insert ed worst offenders self-tapping screws crossed slots head Phillips-type screwdrivers driver lifts out slot before screw really tight because modeler doesnt want WI III WELL SON TUE REASON WHY YOU tOwT SEE# r I4AVE C0J%FFL 0UR NEW TRAINE 35 BEAVSL THAT LIP TNERL 33 BIRD.. REAL GIRt YOUR PLANE HIT TH cOUND AL4f 35 MINUTES A&O place excessive force downward mechanism correct assump tion can damaging cure simpledont use Phillips screwdriver cams its way upward out slots Use instead small jewelers screwdriver preferably sharp corners blade tip wont lift out slot much less downward pressure screw can made sufficiently tight will back out engine vibration servo action club members Laser scale model crashed found afterward elevator servo no arm-retaining screw installed few weeks later another modeler experienced erratic ac tion control surfaces ground wing removed search cause found same screws loose several servos Another modeler found screw lying fuselage bottom completely out servo arm tightened properly screws will never come loose have made practice securely tighten screw very instant first serted think doing later time good chance will gotten Just before first flight new model take another look screws After can forgotten response Bobs initial question whether am aware true situa tion regard servo-output-arm-re taming screws answer isYes have witnessed several model crashes due such screws backing out clearly remember least crash screws self-tapping Phillipshead variety couple years before began preaching safety through column checking out model new member club failed check security servoarm-retaining screws lost rudder con trol Sig Kadet spiralled long grass no ailerons minor damage became believer checking screw security Im sure agree Bobs statement once tightened screws other screws mat ter can forgotten think periodic check nuts bolts screws model takes few minutes worthwhile effort Im also advocate using some means lock fasteneers Continued page 16 14 Model Aviation WHEN YOU FORGET OUR UNITS REMEMBER Wet Cell & Gelled Cell Batteries Completely automatic operation Connect forget Pays itself eries last two three times longer Two models fit size batteries REGULAR MODEL$3993 ForteldkrtandsmallPIus$25&H etectnc boat battenesSpecify 612 24V HEAVY DUTY MODEL$4995 sport winch large boat andPlus $2 SOS & H electric power charging batteriesSpecify 6 1 2V CaRa Products PO Box 221 Canton SD 57013 605-987-5924 SASE 0 nomao Deale nqu en ed RC System NiCd Batteries chargers need age Cycler prevent memory Tester Ito rind bad cells Quick Criarger 2 4 hours Trickle charger sate level Field Fast Charger both Rn Tn Portable charger input 1 20V 1 2V Multiple Charger up 3 Tn 5 Rn Completely Automatic STANDARD MODEL$179S5 Fits48VRnand96VlnpacksPlunS5S&H Others available write call One-Speed Dremel Tool Full variable-speed operation Retains on-ott switch inside case Model 270 280 only Plus 51 50S& H FORD FLLVVER NEW 1 48 SCALE PLASTIC MODEL KIT Henry Fords Model T Air 1926 FORD FLIVVER powered French three-cylinder Anzani engine capable 85 miles per hour aircraft exists today Dearborn Michigan Ford Museum KIT FEATURES INJECTION-MOLDED PARTS REHENSIVE INSTRUcTIONS LS FOR MARKINGS GOLDEN AGE SERIES 1LLA1S SEND $2 FOR COMPLETE CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 buried within model can checked after covered screws nuts bolts serve pivot aileron belicranks prime ex ample hidden fasteners cannot periodically checked should fore locked some manner prefer dab epoxy use self-locking Nylock other brand nut subject shedding parts flight dont forget secure hinge pins control surface hinges non-removable dont have worry about falling out some Again can recall time asked perform check first flight beginners model also Sig Kadet During check told builder wasnt impressed security hingepins installed elevator rudder hinges After assured made secure attempt ed first flight guessed hinge pins rudder fell out second time watched Kadet spiral long grass essentially no damage case wondering yes recommend Sig Kadet first model newcomer hobby Which brings another subject What models good trainers beginners got RC part hobby result bumping Hurst Bowers AMA museum curator local hobby store back 1968 trip hobby store purchase balsa covering material repair Comet rubber-pow ered Free Right model built son time four years old OK admit built Comet kit myself using son excuse Anyway cut long story short found Hurst Mr Scale Washington DC area time As result first RC model scale modelan Aeronca Tandem Did hear someone say bad choice first RC model Actually since plans Hurst lent build model intended Class B Gas Scale model Free Flight Ohlsson 23 power perfect choice soloed model during second trip flying field Perhaps word solo misnomer technique flying treat Free Right model using radio keep flying away Galloping Ghost radio Controllaire now World Engines meant hand-launched wouldnt touch stick GG radios stick until enough altitude prevent mistaken command pilot causing its demise Landings always made dead-stick since throttle control never worked worth hoot Aeronca Clark-V airfoil lots dihedral also slow flier Cox 09 power gave its pilot time Continued page 18 16 Model Aviation BYRON ideo ~JORIGINALS 7NewTape Show Season 85 Featuring Product Information Jet Rally 85 Fun Fly 85 STRIKING BACK Thousands have enjoyed 1984 tape featuring exciting WWII Air Battle Reenactment Additions new tape include C-47s exciting paratroop assault e tanks fabulous 1/5 Air Force Action For personal copy send $2500 Byron Originals Box 279 Grove IA 51445 12-364-3165 Please specify VHS Beta Format EU~UEEEEEENuENuuuuu U sT6QuALmr FUELS * Special Igniters improve cold starting idle characteristics * High Film Strength Additives increase lubricity provide maximum lean run protection * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion U FREIGHT U COLLECT I55 GAL DRUM I$19000 I$25800 $32500 $38500 $52000U $66000 PINT QUART GALLON 0% Nitromethane$315$450$1050 5% Nitromethane$365$525$1250 10% Nitromethane$415$550$1450 15% Nitromethane$430$625$1650 25% Nitromethane$495$750$2095 35% Nitromethane$575$875$2495 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane $415$550$1395$29500 15% Nitromethane $425$625$1595$35900 THE CHOICE OF CHAMPION FLYERSU E Fo ove 20 yea s SIG has blending fuel finest quality ingredients available coho 9955 Pu e very best grade available nitromethane use 100% pure get honest U portion based % volume maximum lubrication get perfect 50/50 blend Bake s AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest qua ty fue can made price Dont take word try some ludge yourself See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 S bjox h ewthext nets * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pk/2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine FITS MOST ENGINES 25 UP $225 $225 $195 $195 SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO lAdd 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 U U U U U U U U U U U U U U U U SIG CHAMPION 2-STROKE FUEL FREE SHIPPING ON ORDERS OVER $1500 think attributes feel make good trainer beginning modeler Unfortunately multi tude so-called trainers market have qualities other words basic trainers ad vanced trainers Again unfortunately some latter models peddled designers/manufacturers perfect beginner couple years ago received letter Jim Connor modeler Horse Heads NY Jim spotted advertise ments so-called RC trainer models engines up 35 cu in Christ mas catalogs two major national retail department stores advertisements accompanied warnings statements about seeking help experienced flier before attempting first flight Jim also enclosed advertisement clipped model magazine captioned .an RC trainer can flown beginner instruc tor ad went say model .. will take off fly itself land itself beginner built fairly well some imaginary flights before actual first flight will probably have no problems soloing model first RC flight picture accompanied ad pos sible model would capable flying itselfU rigged correctly Jim fellow modelers feel ad slap face safety poor taste Another modeler Jim Waterman San Antonio TX expressed opinions concerning trainer models Guest Editorial April 1985 issue Model Aviation must have read because editor note September 1985 issue stated Jims guest editorial kicked off flurry mail offices Apparently wrote agreed Jims views happen similar views Ive just expressed column Perhaps some questioning feel selection right type trainer first model has bearing flight safety response opinion number crashes due purely simply fact model got ahead its pilot statement mean pilot lost control because model required control responses beyond capabilities clubs have semi-formal flight training program new members past Safety columns have discussed such programs expressed views what basic maneuvers should demon strated before beginner can con sidered competent flier turned loose instructor However have yet see ny recommendations choice first model flighttraining programs think youll agree would foolhardy stick neck out column publish Continued page 20 18 Model Aviation U U U U U U U U U U U U U I U U U U U U U U U U U U U U HOBBY HAMMER *9 95 APPROx LENGTh 7%Extra Tip INCLUDES*125 Steel Brass n Tip ISpecify extra tip orderingl Send Check Money Order M & W MODELS P0 Box 6627 Huntington Beech CA 92615 17149621703 Add iSOfor Post & Hand CA Rex add 6% tax O@O@00000@O@O@O@O@O@OOO@OO VIDEO PROGRAMS IVluIcDu Way 18 UP presents B eath Tak ng Aresti arid Formation Aerobatics Performed World Reknossn Celebrities Bob Hoover Leo OCsPA Loudenslariger Canadian Snowbirds Eagles French Conection Warbirds & Others Special Interviews Exciting Music Good Picture QSharp Editing Lots Profes sIonal Toucb Running time 70 mm Price S4795 LEARN TO BUILDVHS & BETA 0 LEARN TO FLYRENT BuY IBASIC CONSTRUCTION FOR BEGINNERS IN R/C 107 Miii 4995 BASIC FUGHT TRAING FOR BEGINNERS IN R/C65 Miii 4495 3ThE WORLD OF MODEL AVIATION iii 4495 4OSHIOSI4 OVERVIEW55 Mlii 3996 6 US SCALE MASTERS CHAMPIONSHIPS. 60 Mlii 4195 AIRPLANE pjc30 Mm 399 0 07 WARBIRDS IN ACTION FuN Scale Air Shows & Morel . 75 Mlii 4995 S LHOPPINIVeIeOyI Model& FuN Scale4SMIIS 4195 0 soles final prices subject change please check cwve,t ads Jar rites YJ ORDERING INFORMATION Please Read Carefully AvoId Delays RENTAL DEPOSIT full purchase price EACH program ordered dfference ir refunded RENTAL DfJIATION week after delivery Reserved dates require IS day notice 0 PAYMENT Check 10 day clearance money order Charge Orders Include Cmd ration j Date Phone COOs available phone — SHIPPING $375 ForeIgn Canada add 10% TOTAL others add 15% IL res add 7% tao0 0 V SEND ORDERS T ACADEMY OF AVIATION RESEARCH & DEVELOPMENTs P0 BOX 277 0 HAZEL CREST ILLINOIS 60429 0277 0 3123350776 10am 8pm Mon Sat 000000000000000000000 Designed ut yaw hand trand flexible steai xabta leaders e tuck cant slip set tar nesirsi etevatar tuet-resistant plastic Strong pretested pretarmed loops Excaltenr iraining handle Na 400 0 11 Thin snique combination reel con irol handla mate world iamous Wather U-Central System ureely molded raugh tact proot styrese adjustable brake makes possible ix change vaur ilying radius during tlight satety tack prevents accidental sickening tines qualifies s-reely tar contest tlying Comes 70 met si multistrand stainless steel cable either 015 018 No 015 $1800 e No giB 0 Throttle 3Line Control 0rc04r~ Handle Unit I-ugh impact durable plastic rugged precision mechanism will last ior yearsready tar use INa storaae linesl No 701 0 Dellcrank 3 LIne Engine Speed Plane Unit Heavy Duty Upright Unit mounting tap ot supports sorb motor mounts beams etc No702 0 Sospendad Unit maunting models requiring contral unit ta bolted under control support No 703 $800 list trainers can recommend ltd sure miss some good ones have manufacturers come after proverbial axe Im curious learn whether clubs have information packets beginners mention suitable model choices years ago participated number shopping mall displays put club time Northern Virginia Radio Control Club first displays found common question much does cost get started what model recommend future displays one-page infor mation sheet hand out response such questions sheet listed several models brand name club members agreed easy fly Something did feel also worthwhile suggest models advanced trainers suitable recently-soloed club member Its possible greater risk accident beginner soloes considers himself qualified fly modelincluding latest hot Pattern ship thoughts ramblings would appreciated may have seen advertisement recent issues Model Aviation new company goes name Pelican Enterprises Inc owner com pany Terrence Surma recently sent catalog items selling concern safety particu larly caught eye CyA Mask Pelican clalms mask .. vides dependable filtering concentra tions fumes cyanoacrylate glue up 1000 ppm know number readers have experienced discomfort some cases ill health used cyanoacrylate CyA glue areas poor ventilation among sufferers might want contact Pelican order mask sells $1247 plus $350 shipping As say ad mask thats cheaper hospital visit catalog free can obtained Pelican Enterprises Inc 265 Ox ford Lane Bloomingdale IL 60108 Tell sent couple issues back mentioned accident occurred modeler attempted use electric starter model equipped spin ner incident starter got offcenter shattered prop sending piece blade modelers chest Another rather unusual incident involving electric starter described December 1985 newsletter Amarillo Radio Kontrol Society ARKS News editor stated Under title SAFETY read guess now us have heard Continued page 139 E-Z JUST U Control Handles Control Handle 208-362 5205 Idaho 63707 AfaSiAftSso Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0
Edition: Model Aviation - 1986/05
Page Numbers: 14, 16, 18, 20, 139
John Preston__________________________ Safety Comes First Watch may screw loose Whats good RC basic trainer extra careful youre using electric starter TOGETHERNESS number oc casions past few months Ive read newspaper accounts concerning parts full-scale aircraft falling off flight dont believe incidents involved loss life juries certainly potential jury exists critical component such part wing flap separates reported case believe potential injury could also result vital component model airplane shed during flight Back December 1985 issue described incident resulted crash modelers CAP 21 allegedly due engine vibration caus ing self-tapping screws holding aileron servo together loosen during flight December column asked read ers experienced similar problem received letter response However letter arrived just week mentioned different screw-loos ening problem associated servos writers believe much likely occur letter Bob Dolly Wischer write RC Scale column Model Aviation said several columns have men tioned servos have become disassem bled because self-tapping screws have loosened dont know aware true situation have never heard servo cases coming apart really hazardous point watch tiny screw holds output arm servo out put shaft past year have several accidentsor near-accidentsat club field because screws either never installed loosely insert ed worst offenders self-tapping screws crossed slots head Phillips-type screwdrivers driver lifts out slot before screw really tight because modeler doesnt want WI III WELL SON TUE REASON WHY YOU tOwT SEE# r I4AVE C0J%FFL 0UR NEW TRAINE 35 BEAVSL THAT LIP TNERL 33 BIRD.. REAL GIRt YOUR PLANE HIT TH cOUND AL4f 35 MINUTES A&O place excessive force downward mechanism correct assump tion can damaging cure simpledont use Phillips screwdriver cams its way upward out slots Use instead small jewelers screwdriver preferably sharp corners blade tip wont lift out slot much less downward pressure screw can made sufficiently tight will back out engine vibration servo action club members Laser scale model crashed found afterward elevator servo no arm-retaining screw installed few weeks later another modeler experienced erratic ac tion control surfaces ground wing removed search cause found same screws loose several servos Another modeler found screw lying fuselage bottom completely out servo arm tightened properly screws will never come loose have made practice securely tighten screw very instant first serted think doing later time good chance will gotten Just before first flight new model take another look screws After can forgotten response Bobs initial question whether am aware true situa tion regard servo-output-arm-re taming screws answer isYes have witnessed several model crashes due such screws backing out clearly remember least crash screws self-tapping Phillipshead variety couple years before began preaching safety through column checking out model new member club failed check security servoarm-retaining screws lost rudder con trol Sig Kadet spiralled long grass no ailerons minor damage became believer checking screw security Im sure agree Bobs statement once tightened screws other screws mat ter can forgotten think periodic check nuts bolts screws model takes few minutes worthwhile effort Im also advocate using some means lock fasteneers Continued page 16 14 Model Aviation WHEN YOU FORGET OUR UNITS REMEMBER Wet Cell & Gelled Cell Batteries Completely automatic operation Connect forget Pays itself eries last two three times longer Two models fit size batteries REGULAR MODEL$3993 ForteldkrtandsmallPIus$25&H etectnc boat battenesSpecify 612 24V HEAVY DUTY MODEL$4995 sport winch large boat andPlus $2 SOS & H electric power charging batteriesSpecify 6 1 2V CaRa Products PO Box 221 Canton SD 57013 605-987-5924 SASE 0 nomao Deale nqu en ed RC System NiCd Batteries chargers need age Cycler prevent memory Tester Ito rind bad cells Quick Criarger 2 4 hours Trickle charger sate level Field Fast Charger both Rn Tn Portable charger input 1 20V 1 2V Multiple Charger up 3 Tn 5 Rn Completely Automatic STANDARD MODEL$179S5 Fits48VRnand96VlnpacksPlunS5S&H Others available write call One-Speed Dremel Tool Full variable-speed operation Retains on-ott switch inside case Model 270 280 only Plus 51 50S& H FORD FLLVVER NEW 1 48 SCALE PLASTIC MODEL KIT Henry Fords Model T Air 1926 FORD FLIVVER powered French three-cylinder Anzani engine capable 85 miles per hour aircraft exists today Dearborn Michigan Ford Museum KIT FEATURES INJECTION-MOLDED PARTS REHENSIVE INSTRUcTIONS LS FOR MARKINGS GOLDEN AGE SERIES 1LLA1S SEND $2 FOR COMPLETE CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 buried within model can checked after covered screws nuts bolts serve pivot aileron belicranks prime ex ample hidden fasteners cannot periodically checked should fore locked some manner prefer dab epoxy use self-locking Nylock other brand nut subject shedding parts flight dont forget secure hinge pins control surface hinges non-removable dont have worry about falling out some Again can recall time asked perform check first flight beginners model also Sig Kadet During check told builder wasnt impressed security hingepins installed elevator rudder hinges After assured made secure attempt ed first flight guessed hinge pins rudder fell out second time watched Kadet spiral long grass essentially no damage case wondering yes recommend Sig Kadet first model newcomer hobby Which brings another subject What models good trainers beginners got RC part hobby result bumping Hurst Bowers AMA museum curator local hobby store back 1968 trip hobby store purchase balsa covering material repair Comet rubber-pow ered Free Right model built son time four years old OK admit built Comet kit myself using son excuse Anyway cut long story short found Hurst Mr Scale Washington DC area time As result first RC model scale modelan Aeronca Tandem Did hear someone say bad choice first RC model Actually since plans Hurst lent build model intended Class B Gas Scale model Free Flight Ohlsson 23 power perfect choice soloed model during second trip flying field Perhaps word solo misnomer technique flying treat Free Right model using radio keep flying away Galloping Ghost radio Controllaire now World Engines meant hand-launched wouldnt touch stick GG radios stick until enough altitude prevent mistaken command pilot causing its demise Landings always made dead-stick since throttle control never worked worth hoot Aeronca Clark-V airfoil lots dihedral also slow flier Cox 09 power gave its pilot time Continued page 18 16 Model Aviation BYRON ideo ~JORIGINALS 7NewTape Show Season 85 Featuring Product Information Jet Rally 85 Fun Fly 85 STRIKING BACK Thousands have enjoyed 1984 tape featuring exciting WWII Air Battle Reenactment Additions new tape include C-47s exciting paratroop assault e tanks fabulous 1/5 Air Force Action For personal copy send $2500 Byron Originals Box 279 Grove IA 51445 12-364-3165 Please specify VHS Beta Format EU~UEEEEEENuENuuuuu U sT6QuALmr FUELS * Special Igniters improve cold starting idle characteristics * High Film Strength Additives increase lubricity provide maximum lean run protection * Special Detergents help prevent varnish promote clean burning * Rust Preventatives protect expensive engines corrosion U FREIGHT U COLLECT I55 GAL DRUM I$19000 I$25800 $32500 $38500 $52000U $66000 PINT QUART GALLON 0% Nitromethane$315$450$1050 5% Nitromethane$365$525$1250 10% Nitromethane$415$550$1450 15% Nitromethane$430$625$1650 25% Nitromethane$495$750$2095 35% Nitromethane$575$875$2495 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane $415$550$1395$29500 15% Nitromethane $425$625$1595$35900 THE CHOICE OF CHAMPION FLYERSU E Fo ove 20 yea s SIG has blending fuel finest quality ingredients available coho 9955 Pu e very best grade available nitromethane use 100% pure get honest U portion based % volume maximum lubrication get perfect 50/50 blend Bake s AA Castor Oil Klotz Techniplate Racing Oil protect expensive engines finest qua ty fue can made price Dont take word try some ludge yourself See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 S bjox h ewthext nets * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pk/2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine FITS MOST ENGINES 25 UP $225 $225 $195 $195 SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO lAdd 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 U U U U U U U U U U U U U U U U SIG CHAMPION 2-STROKE FUEL FREE SHIPPING ON ORDERS OVER $1500 think attributes feel make good trainer beginning modeler Unfortunately multi tude so-called trainers market have qualities other words basic trainers ad vanced trainers Again unfortunately some latter models peddled designers/manufacturers perfect beginner couple years ago received letter Jim Connor modeler Horse Heads NY Jim spotted advertise ments so-called RC trainer models engines up 35 cu in Christ mas catalogs two major national retail department stores advertisements accompanied warnings statements about seeking help experienced flier before attempting first flight Jim also enclosed advertisement clipped model magazine captioned .an RC trainer can flown beginner instruc tor ad went say model .. will take off fly itself land itself beginner built fairly well some imaginary flights before actual first flight will probably have no problems soloing model first RC flight picture accompanied ad pos sible model would capable flying itselfU rigged correctly Jim fellow modelers feel ad slap face safety poor taste Another modeler Jim Waterman San Antonio TX expressed opinions concerning trainer models Guest Editorial April 1985 issue Model Aviation must have read because editor note September 1985 issue stated Jims guest editorial kicked off flurry mail offices Apparently wrote agreed Jims views happen similar views Ive just expressed column Perhaps some questioning feel selection right type trainer first model has bearing flight safety response opinion number crashes due purely simply fact model got ahead its pilot statement mean pilot lost control because model required control responses beyond capabilities clubs have semi-formal flight training program new members past Safety columns have discussed such programs expressed views what basic maneuvers should demon strated before beginner can con sidered competent flier turned loose instructor However have yet see ny recommendations choice first model flighttraining programs think youll agree would foolhardy stick neck out column publish Continued page 20 18 Model Aviation U U U U U U U U U U U U U I U U U U U U U U U U U U U U HOBBY HAMMER *9 95 APPROx LENGTh 7%Extra Tip INCLUDES*125 Steel Brass n Tip ISpecify extra tip orderingl Send Check Money Order M & W MODELS P0 Box 6627 Huntington Beech CA 92615 17149621703 Add iSOfor Post & Hand CA Rex add 6% tax O@O@00000@O@O@O@O@O@OOO@OO VIDEO PROGRAMS IVluIcDu Way 18 UP presents B eath Tak ng Aresti arid Formation Aerobatics Performed World Reknossn Celebrities Bob Hoover Leo OCsPA Loudenslariger Canadian Snowbirds Eagles French Conection Warbirds & Others Special Interviews Exciting Music Good Picture QSharp Editing Lots Profes sIonal Toucb Running time 70 mm Price S4795 LEARN TO BUILDVHS & BETA 0 LEARN TO FLYRENT BuY IBASIC CONSTRUCTION FOR BEGINNERS IN R/C 107 Miii 4995 BASIC FUGHT TRAING FOR BEGINNERS IN R/C65 Miii 4495 3ThE WORLD OF MODEL AVIATION iii 4495 4OSHIOSI4 OVERVIEW55 Mlii 3996 6 US SCALE MASTERS CHAMPIONSHIPS. 60 Mlii 4195 AIRPLANE pjc30 Mm 399 0 07 WARBIRDS IN ACTION FuN Scale Air Shows & Morel . 75 Mlii 4995 S LHOPPINIVeIeOyI Model& FuN Scale4SMIIS 4195 0 soles final prices subject change please check cwve,t ads Jar rites YJ ORDERING INFORMATION Please Read Carefully AvoId Delays RENTAL DEPOSIT full purchase price EACH program ordered dfference ir refunded RENTAL DfJIATION week after delivery Reserved dates require IS day notice 0 PAYMENT Check 10 day clearance money order Charge Orders Include Cmd ration j Date Phone COOs available phone — SHIPPING $375 ForeIgn Canada add 10% TOTAL others add 15% IL res add 7% tao0 0 V SEND ORDERS T ACADEMY OF AVIATION RESEARCH & DEVELOPMENTs P0 BOX 277 0 HAZEL CREST ILLINOIS 60429 0277 0 3123350776 10am 8pm Mon Sat 000000000000000000000 Designed ut yaw hand trand flexible steai xabta leaders e tuck cant slip set tar nesirsi etevatar tuet-resistant plastic Strong pretested pretarmed loops Excaltenr iraining handle Na 400 0 11 Thin snique combination reel con irol handla mate world iamous Wather U-Central System ureely molded raugh tact proot styrese adjustable brake makes possible ix change vaur ilying radius during tlight satety tack prevents accidental sickening tines qualifies s-reely tar contest tlying Comes 70 met si multistrand stainless steel cable either 015 018 No 015 $1800 e No giB 0 Throttle 3Line Control 0rc04r~ Handle Unit I-ugh impact durable plastic rugged precision mechanism will last ior yearsready tar use INa storaae linesl No 701 0 Dellcrank 3 LIne Engine Speed Plane Unit Heavy Duty Upright Unit mounting tap ot supports sorb motor mounts beams etc No702 0 Sospendad Unit maunting models requiring contral unit ta bolted under control support No 703 $800 list trainers can recommend ltd sure miss some good ones have manufacturers come after proverbial axe Im curious learn whether clubs have information packets beginners mention suitable model choices years ago participated number shopping mall displays put club time Northern Virginia Radio Control Club first displays found common question much does cost get started what model recommend future displays one-page infor mation sheet hand out response such questions sheet listed several models brand name club members agreed easy fly Something did feel also worthwhile suggest models advanced trainers suitable recently-soloed club member Its possible greater risk accident beginner soloes considers himself qualified fly modelincluding latest hot Pattern ship thoughts ramblings would appreciated may have seen advertisement recent issues Model Aviation new company goes name Pelican Enterprises Inc owner com pany Terrence Surma recently sent catalog items selling concern safety particu larly caught eye CyA Mask Pelican clalms mask .. vides dependable filtering concentra tions fumes cyanoacrylate glue up 1000 ppm know number readers have experienced discomfort some cases ill health used cyanoacrylate CyA glue areas poor ventilation among sufferers might want contact Pelican order mask sells $1247 plus $350 shipping As say ad mask thats cheaper hospital visit catalog free can obtained Pelican Enterprises Inc 265 Ox ford Lane Bloomingdale IL 60108 Tell sent couple issues back mentioned accident occurred modeler attempted use electric starter model equipped spin ner incident starter got offcenter shattered prop sending piece blade modelers chest Another rather unusual incident involving electric starter described December 1985 newsletter Amarillo Radio Kontrol Society ARKS News editor stated Under title SAFETY read guess now us have heard Continued page 139 E-Z JUST U Control Handles Control Handle 208-362 5205 Idaho 63707 AfaSiAftSso Letters Editor Continued page 12 Thus weve filed criminal complaint charges against guy shooting down airplanes flying through sky Its lengthy battle prosecute sin come down home stretch hope will win Now before leave office have recommendation state Lets finish up court case forget about hate Weve lived through three years prob lems some us its rough Lets get sport model avi ation weve suffered long enough Mike Barklow Appleton WI accompanying letter Mike said foregoing poem written 1983 stepping down president Valley Aero Modelers clubs newsletter notpri nted due suit progress Despite best efforts club lost flying field doldrums briefperiod maintaining positive attitude group able establish new flying site rebuild itself now bigger better ever very gratying to organization Mike notes Safety/Preston Continued page 20 about accident members havent heard heres story heard few weeks ago member friend out flying weather fairly cold member standing wing tip friends plane friend attempting start using standard electric starter plastic engagement cone Somehow engine started friend surprised starter slipped off spinner hit ground trigger still depressed strn spin ning plastic cone exploded sending fragments directions friend got small piece through part ear sliver hit member corner eye caine out again doctor says 50% chance will lose eye may have have cornea transplant incident tragic enough itself stop think what could have happened occurred field person hurt innocent bystander kid Weve got keep spectators children out pit area Friends not. comment incident repeat something Ive said several times previously consider pair safety glass es starting model working shop Have safe month John Preston 12235 Tildenwood Dr Rockville MD 20852 Plane Talk/Winter Continued page 28 things become bit sticky Some will understand presentation its entirety am fortunates can interpret comments virtue simple diagram no math Will prescription fly Ponder photo giant tailless Ugly Stik involves no trick airfoils Follow Joe end youll find other comments play Let assume perfectly symmetric aircraft argument Tschirgi warms up has symmetric airfoils both wing tail thrust line wing tail CG centerline has zero-zero incidence setup also assume fore-and-aft CG position such model trim level flight Since model perfectly symmetric pitch plane its obvious model will also fly straight level verted assumptions solu tion clear leaves another problem can such model trim angle attack except zero tricky part model symmetric angle attack airflow over Behind wing generating lift have downwash evidence vorticity shed wing Its strength centerline strong function aspect ratio normal model configurations downwash small function angle attack concentrated directly down stream model changes angle attack tail sweeps through region Generally results pitching moment curves nonlinear have reduced static stability near zero lift sym metric model assumed stabil izer center downwash field However CG far enough aft static stability can zero unstable region exhibiting positive static margins outside unstable point maximum downwash effect model will have two trim points symmetric model postulated would equal opposite sign lift coefficients best visualized referring illustration fact dynamic pressure re duced wings wake Joe goes also contributes non-linearity course reversal cannot exist unless static stability quite small tail out wakeie CG well aft brings up another interesting point models easy fly some cases easiest have little static Continued page 142 May1986 139 n ou sy SEE- HFE THE BOTTLE OF ZRPJET LEPKED FiND sNIcKE YOU TRIED TO SCRPTCH YOUR GIGGLEEP / 0