Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772
Edition: Model Aviation - 1982/05
Page Numbers: 42, 43, 103, 106, 107, 108
Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772
Edition: Model Aviation - 1982/05
Page Numbers: 42, 43, 103, 106, 107, 108
Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772
Edition: Model Aviation - 1982/05
Page Numbers: 42, 43, 103, 106, 107, 108
Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772
Edition: Model Aviation - 1982/05
Page Numbers: 42, 43, 103, 106, 107, 108
Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772
Edition: Model Aviation - 1982/05
Page Numbers: 42, 43, 103, 106, 107, 108
Rddio Control SCALE Bob & Dolly Wischer FLIGHT PROBLEMS opinion emphasis RC Scale centers its impor tant aspectflight model difficult fly though originated good plan kit problem lies improper preparation somewhere building process arrives field its first flight overweight wing warps misplaced center gravity improper incidence angles wing tail model prime candidate return home plastic trash bag lose another Scale advocate An inexperienced Scale modeler will often ask someone skilled make first flight untried model poor fellow faced having fight built-in problems have seen happen such predicament pilot using unfamiliar transmitter moved lever thought would elevator trim find after crash transmitter power switch moved ofi position test pilot needs someone sufficiently thick-skinned lose sleep over accident However accidents need inevitable no matter controls provided has experience models having similar flight controls model i well prepared Undetected warps wings tail surfaces can become prime cause disaster always disturbed find modelers able see warp because have devel oped measuring technique Robart incidence meter applied various points along wing will quickly show changes indicate warp own favorite method detectingwarps eyesight wing inverted held viewed trailing edge sighting along its center line holding wing steady shift line sight along left right trailing edges determine whether less wings lower surface visible area Hawker Sea Fury Xl Don Gruett Model weighs 12 lb 8 oz has scratch-built retracts 760 sq wing area uses OS gOFSR engine Fine finish Hobbypoxy Formula U over balsa 42 Model Aviation Salvatore Grossos beautiful Stinson SR-a Reliant entered Precision Scale category Toledo show Model 1/6-scale features working strobe navigation lights Precision Scale A6M3-22 Zero Bill Raftery modified Royal kit spans 69 weighs 9 lb one-year project Finish acrylic lacquer over K&B resin/fiberglass cloth has worn weathered look Webra 61 powers across pond see Dennis Iapsfleids latesta b-Ifl span Bede BD-8 Power Magnum 15cc 4-stroke Flying surfaces covered obeche veneer finished film Canopy detail includes 260 screws nuts lequivalent US size 172 polystyrene pilot has fiberglass head Engine uses auxiliary glow heat low throttle Plane has 8 sq ft wing area its 141/2 lb flying weight above trailing edge sighting eye must remain along center line can moved downward reduce amount visible lower surface Tiny warps small 1/32-in can detected simple method course 1/32-in warp could quite harmless average size wing -in warp needs straight ening Better find warp during building process rather after finishing Warps can reduced eliminated using heat steaming kettle soften surface twisting direction opposite warp must twisted beyond straight position because will some spring-back Hold opposite twist cools Heat alone steam may also effective must used caution remember friend tried straighten wing over kitchen range wings interior loaded dope thinner fumes promptly exploded igniting nearby curtains beginnings disaster survived never built another warped wing detrimental warps mentioned type could appear either wing half both halves opposite directions worst condi tion warp raises leading edge lowers trailing edge wing tip its normal position airplane known washin opposite condition washout leading edge lower trailing edge wing tip compared wing root considered beneficial extent commonly used full-scale aircraft should incorporated model used prototype used aerobatic planes because its effect reversed during inverted flight main purpose washout delay tip-stall thereby maintaining lateral stability stall approached some wings washout continuous root tip others Outer panels have intentional warp best model flight results duplicate prototype scaling down model full size prominent features comes light difference angular incidence between wing stabilizer models usually reduced having near-symmetrical airfoils may have little no angular difference try duplicate exact angles reproduce accurate Scale model weight will need added nose compensate light model engine other words angular difference great move balance point forward carried too far model becomes prone nose-over tinless wheels Continued page 103 May 198243 fliS moaei 0 Leo Loudenslagers Laser aerobatic craft big Builder Karl Mueller crafted Mallory Models kit uses geared Webra 12 cu twin power Ship weighs 17 lb sports finish using Hobbypoxy MonoKote Solarfilm 000 REP M s Hot Performance NOT JUST ANOTHER CATALOG 7th Edition the novice tips experts Available through local hobby shop use coupon expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Yes send copy new RADIO CONTROL BUYERS BUIDE B Please check 5 Enclosed $950 $795 plus $1 55 postage US Canada cawu Sand US funds VA residents add 4% saim lea 0 charge U Mastercharge S visa charge No_____________________ Exp Date ______________ Name Street city State Zip ________________________________________ Return Boynton & Associates Inc clifton House clifton virginia 22024 Zaic Frank 9S 7-58 Model Aeronautic Year Book Model Aeronautics Pub NY 1958 224p Avail AMA HQ Zaic Frank 1959-61 Model Aeronautic Year Book Model Aeronautics Pub NY 19612889 Avail AMA HQ Zaic Frank 1964-65 ModelAeronautic Year Book Model Aeronautics Pub CA 1965 224p Avail AMA HQ Zaic Frank Circular Airflow Model Aeronautics Pub CA 1964 152p Avail AMA HQ Zechetella Philip Model Aircraft Yearbook Twentieth Century Pub NI 1936 1149 Zerbe 1 S Aeroplanes Cupplesand Leon Co NY 1915 2429 Zier Avruns Aerodynamics Model Aircraft Dodd Mead Co NY 1942 2599 RC Scale/Wischers Continued page 43 deliberately shifted forward desirable condition Scale appearance working kit published plans assume decision made designer direction compromise case first flight manageability option toward additional nose weight desirable can always removed later found unneces sary model becomes much less sensitive elevator trim adjustments flown slight nose-heavy condition Moving battery pack forward may weight redistribution needed intended model aero batic including spins snap rolls nose weight may need adjusted 1-ox -ox increments experience have tailwheel-type airplane nose heavy Continued page 106 Only $2195 M-60 ADJ Motor Mount Fit WEBRA 91 0 SuEVIA 15 Cu & Others Only $995 Tn S unit ,II yo cro eat usimont mOlung 0-20 Quadra 65 Motor Moun CFeeFoatng prwa Mount Only $2195 May 1982 103 Only RIC Reference Book Will Ever Need 1/4-1/3 SCALE Only $1895 AOJC5TAOLE a,oct pipe Olin, 6 Pipe THROTTLE LINK ASSY Edsoe nag edded MIJ- 11~to 055cm Ouadra Motor ssbralna 0550 ADJ MUFFLER F DEALER ESOPiUI surrcv unnen OHOECT AUTHORIZED FACTORY WARRANTY AND REPAIR SERVICES ENGINESACCESSORIESPARTS SALES SERVICE 1982 High Performance Quadras Needle N Bearings top end Connecting Rod stock Now sell engines overbalanced flywheels installed exchange flywheel special overbalanced $1900 postpaid versions except CD Send Quadra Flywheel NOT entire engine SAME DAY SERVICE! Call Write Catalog 414 762-7155 1O32 E MANITOWOC OAK CREEK WI 53154 umi NAL PERSONAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP wi ERI DISTRIBUTOR INOUIRIFS INVITED flight imbalance caused no problems ground impossible taxi short grass After chewing up number props weight added tailan unusual proce dureand problem solved tail-wheel airplanes relationship tween main gear wheel centers center gravity has effect tracking during takeoff landing rolls wheels too far forward tendency ground loop too far rearward causes nose-overs ideal condition forward CG just aft wheel centers touch up-elevator early part takeoff roll keep tail wheel ground contact best tracking proper amount control surface travel controversial subject Some fliers prefer have much can obtained during first flights order certain control warps CG location incidences unknown second preference close control variables minimum surface movement prefer latter approach Elevator travel particular kept minimum being about 10 side center important consideration have enough up-elevator travel certain being able raise nose takeoff landing airspeed low travel amount approximately same nose-wheel tailwheel models Down-elevator travel minor item seldom used Scale flights possible exception aerobatic type Emeraude now 10 years old example need limiting elevator travel As origin ally set up normal travel about 250 way would snap roll fall tailspin warning whenever G-loads high such completion loop during steep turn additional transmitter stick move ment precipitate spin immeasurably small tiny twitch fingers stick elevator travel reduced about l0 problem ceased exist yet Emeraude remained aerobatic would snap roll spin command model has 30 washout probably feature kept self destructing early flights An engine change almost doubled horsepower also helped maintain flying speed steep turns Excessive aileron travel less likely cause flight difficulty non- aerobatic Scale models really no good reason roll two seconds Aileron travel permits upright inverted flight second creates problems solves Ailerons can cause wing stall due drag excess travel exception rule low surface travel rudder movement tail-skid-type airplane sufficient rudder area travel becomes impossible turn ground 106 Model Aviation THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts roibter bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Box 1168 Passaic NJ 07055 UAHIU KIIUI1LLA WI U LUDD QUADRA ds rrKt stable easiest fly small 40 size R/G Helicopter Low maintewoemchanics engineer ed Dieter Schiuter Father RIG ures fully mixing main rotor head upright spinner starting straight sttt driven tail rotor & autonstic compensation symmet rical pr*ullt main rotor tail rotor blades autorotation clutch Uses parts irt#t0ck guarantee Mm up tochM 5jfrnr USA lidlary I / MINIATURE AIRCRAFT 2594 North Orange Bloesom Trail ndo Phone 3061422-1531 old-timers needed coordinated aileron rudder perform proper turn models planes should flown same manner aerobatic performance desired large rudder maximum travel key quick accurate response As airplane slows flight controls lose responsiveness order ailerons first elevators finally rudder answer question Scale models difficult fly would need find some has flown types models regarded somewhat difficult WW types short nose landing gear far forward theseare troublesome ground hand ling just before takeoff after landing experience has tail-draggers almost exclusively exception Douglas A-20 Havoc twin Havoc has delight fly both engines can kept running model properly ballasted 8 oz lead nose engines weight can hardly regarded ballast because mounted wing leading edge nose wheel pro vides excellent tracking expected nose weight prevents rotation until sufficient speed attained make low-travel elevators effective Limited elevator travel has used safety device full-size planes model Havoc steered ground its nose wheel whereas prototype castering nose wheel steered indi vidual wheel brakes main gear single rudder out prop wash doesnt become effective until nose wheel loses contact runway full-size plane could flown mostly feet floor no rudder required model duplicates feature lack experience multiengine models limits qualification com ment further Look Future Product DeveIopment K Full Command Systems Manufacturers EK Logitrol radios accessories Dealer Inquiries Welcome Division B&B Industries Full Command Systems 908 E Rosewood Spokane WA 99207 509 4872122 FROWN A-23 CO-2 TINY PEANUT CO2 ENGINE ENGINE $3995 CHARGER $995 3/4 COMPlETE C#TA10G $100 PHONE 714 499-8675 442 4936 Peck-P 4m es W BOX 2490-MA LA MESA CALIF 92041 Rommended Radios Mufifem aid J 4 chanel radio Kits arid man flies FL 32804 Inc Coming soon New radio 4 chan 4 servo w/nicads $12995 SCALE DOCUMENTATION SCALt DRAWINGSPHOTOS-BOOKLETS MODEL PLANS 1982 AiRPLANE CATALOGS * 200 / REPLA-TECH ~INTERNATIONAL VIOA 086200N 9748a 45B00 MC KENZIE HWY May 1982 107 BUY DIRECT SAVE OVER 50% COMPLETE MODELERS ASSORTMENT OF FASTENERS MAY1981 NEWATYOURFINoERTEPSI~* RETAIL PRICE SURVEY **SHOWED ALLOY PARTS WITH *NEVER OFFERED BEFORE!**NO ORGANIZER AT OVER FIFTY * NO MORE SPECIAL TRIPS TO THE **OOLLARS THAN TWICE OUR* * HOBBY STORE IF IT IS OPEN**$2495* HSA-735 ALLOY STEEL SOCKET HEAD CAP SCREWS CONTENTS LISTPCS 256316 SOCKET HEAD CAP SCREW 25 256 4 SOCKET HEAD CAP SCREW 25 256 1 2 SOCKET HEAD CAP SCREW 25 4-401 4 SOCKET HEAD CAP SCREW 20 4-401 2 SOCKET HEAD CAP SCREW 29 2 440 OCKET HEAD CAP SCREW 20 440 1 SOCKET HEAD CAP SCREW 20 632 14 SOCKET HEAD CAP SCREW IS 632 2 SOCKET HEAD CAP SCREW 15 63239 SOCKET HEAD CAP SCREW 15 632 1 SOCKET HEAD CAP SCREW 15 6-32 1 SOCKET HEAD CAP SCREW15 6322 SOCKET HEAD CAP SCREW 15 IllliI6Vi FIllY I5A48s5i1— USA-agO ALLOY ASSORTMENT SHOWN Mail Order To * Please inolude S250 postage HARDWARE SYSTEMS * handlIng 7428Add $150 COD Washngtn Ave * Ming residants add 5% sales las Eden Pealrle MInn 55344* Orders will shipped withlng 48 Phone 8124416757 hours FLAT WASHERS SAE ZINC PLATED 4 75 65 95 75 85 05 TOTAL PCS 735 * ** *** ** ** ** * **** *** * KITSCOME COMPLETE WITH iS COMPARTMENT HEAVY DUTY INDUSTRIAL ORGANIZER * * * * * * * *A ***A ** * * ** ** ** A** ** ONLY $2495 IIEAT LAKES tOIEI & XIOU AII5ANDICK MAHER First Time POST OFFICE BOX 308THOMAS J MAHER TAWAS CITY MICHIGAN 48763 Advertised TELEPHONE 517 362-6078 AxIPSIUF (NSTRI Ii N 44~ SNJ HARVARD 633/8 Span 0 Power $18800 P4 SCALE IizzL2 1AICHIO3AITYPE99VAL 705 Span 60 90 POWer $22500 WE THINK YOU WILL AGREE THAT THEY ARE THE BEST NAWLLTD KITS YET FUSALAGE WINGS TAIL SURFACES WHITE EPOXY FINISH READY FOR PAINTS DETAILING EURATHANE FOAM RIGIDLY SUPPORTS EPOXY GELL COAT FIBERGLASS REINFORCED AT STRESS POINTS ONLY ASSEMBLY INSTALLATION OF EGUIPMENT & PAINTING REDUIRED SCALE WHEELS INCLUDED NO NEED TO COVER WITH BALSA SHEET OR FILM SUPERIOR PRODUCT WEole Lot LeIt Do CLUBS CHECK OUT OUR SPECIAL INTRODUCTORY OFFER FEATURES INCLUDE Space battery & meter panel Transmitter compartment Room gallon fuel MASTER AIRSCREW FLIGHTBOX KIT Master Airscrew Flight Box has features larger boxes compact handy arrangement parts cut imported mahogany plywood will take stain varnish paint finishes overall size l9Ysx 9Y2x 12 high $3at dealer 495 postpaid California add 6% Sales Tax Propeller storage Gravity closed small parts storage 7/8 aluminum handle e Complete instructions & fasteners WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 NYLON INSERT LOCK NUTS ZINC PLATED 258 440 632 models vary wing loading 16 37 ox per sq ft wing area Except slow-flight Capabilities lightly-loaded models problems wind Cant really see lot difference degree flight difficulty spot landing missed overshooting just likely heavy jobs floats too high altitude real difference difficulty seems result lack practice flying field avoid flight difficulty greatest benefit comes having reliable trainer flies Scalemodel characteristics pouring gallons fuel through its engine Bob Dolly Wiseher RL 1 S-221 Lapham Peak Roa4 Delafleld WI 53018 RC Aerobatics/Van Putte Continued page 45 rpms ground about same vertical maneuvers lot power OS Max can fly full Masters pattern three maneuvers before have come theres usually ounce left original 16 So youre using higher nitro fuel am10% R VP try cutting back rushed out Sears got Some filled epoxy See February column R VP Works great Ive often wondered someone didnt Its really expensive either After receiving nice comment about Sears epoxy feeling pretty good until other night got long distance call Bud Wolfe Scottsdale AZ told people Sears store never heard it wasnt listed regional distribu toTs record books So apparently Sears filled epoxy isnt available everywhere However have purchased Dayton OH Washington DC booming metropolis Fort Walton Beach FL Since Bud went trouble letting know couldnt buy lived went local Sears store bought two packages sent him Now has package use take local Sears show what talking about Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 FLYING NEAR AIRPORTS BE CAREFUL 108 Model Aviation tICS Scale Hasters East Coast Scale Masters Qualifier orGES RAOIO CONmOL Bowie Maryland June 2-27 1982 Stand-Off Scale t Scale Registration 830- 1000 Superb Paved Flying Site Camping Field Excellent Prizes Tom Bayne CD 301 627-5118 17102 Earlham Ct Upper Marlboro MD 20772