In background King Condor comes originally rubber-powered Free Flight foam ARF foregrouna electric powered RC conversion original model 22 oz conversion RC gear electric motor system weighs 54 oz INTERESTED electric-powered model flight Before electrified thoughts get short-circuited read Offered perhaps quickest simplest least expensive way investigate intriguing different method RC flying Electric power has available model use over 15 years now apparent offers some exclusive ad vantages past considering power source modelers compared glow engines advantages Electric flight quickly dimmed tough give up ample engine power restricted performance electric motors initially offered youve paying attention may have noticed giant strides have made Electric power systems last few years now possible elec trically duplicate glow engine power up about 40 cu size range enough good sport flying Lots modelers finding enjoyable perform ance much smaller less ex pensive 05 motors Along increase electric motor power has come significant reduction system weight electric power may never match glow power weight basis modelers finding Electric systems have Intended simple inex pensive vehicle help decide Electrics modified foam model also turned out have surprising per formance thermaling ability EHal deBolt enough power make planes flyand fly well simple solu tion design model structure eliminate excess strength weight wasnt needed attractive power source must also affordable Glow engines have around long enough offer us pretty good power-to-dollar ratioas yet unmatched Electrics Paul MacCready has shown us some wonderful things can done electric solar power heavy financial backing Fortunately now seeing Electric systems models dont shock pocketbooks youll pardon another pun filling needs line thinking have forget about comparing various power sources concentrate basic requirement average-sized model enough performance enjoyment accounts great popularity various 05size Electric systems cost falls range good sport engine similarsized models 05 performance has proven quite satisfactory have following Electric Electric King Condor Trainer 38 Model Aviation scene may about ready give try advantages silent powered flight no messy fuel no engine start fuss minimum cost per flight very appealing have hang-up wanting normal modeling activity suffer find out whether like Electrics solution find quick-tobuild inexpensive model thats exactly what offered youve asked yourself whether average modeler can have successful rewarding flights using accustomed build ing methods materials stock electric motor power system standard RC gear Im happy say answer yes model proof proof also can done changing lifestyle However should realize electric power major change glow engines will have some relearning mind wise heed advice have paved way us Electric flight use trainer-type model start After youve learned principles Electric operation flight can put big effort Electric masterpiece particular Electric trainer intended teach rank beginner fly experienced modeler learn basics ofthis new type power fills design requirements readily obtainable inexpensive simple put together things make initial lessons about Electric flying painless possible As added bonus provides some very delightful fun flying Electric gurus tell us Electric trainer should glider variety enough wing area light loading rather slow flight equates about 600 sq wing area 05 motors consideration plus concepts minimum cost time investment choices narrowed Styrofoam ARF category kit models Without too much effort came upon two molded foam offerings filled bill Previous experience both models indicated offered excellent performance aerodynamic qualities quite suitable Electric flight First two candidates Lazy Bird Midwest Products Two-Meter Sailplane other King Condor giant-sized rubber-powered model pro duced Goliath Whirlwind Aircraft Co Both models could con verted easily accommodate battery cells electric motor chose King Condor next step obtain necessary Electric items Astro Flight #6505 flight system #4005B charger #4018 belt reduction unit #4032 microswitch similar items available Leisure Electronics assembled model Jet cyano acrylate CyA covered Gold bergs ColorTex Construction major consideration King Condor conversion designed fly very slowly weight 22 oz conversion Electric doubled weight 54 oz model flying speeds greatly increased over original rubber-powered version Happily needed strengthening can accomplished easily adds longevity basic foam structure began epoxy-gluing two-part wing together center fiber glassing joint normal manner Condor has weight wing rubber-power flight control purposes re move weight will needed RC add strength plain foam wing decided use stressed skin method covering ColorTex material has greater tensional strength plastic iron-on films compatible foam since low heat used anyone believes strength desired 1/16 x -in sheet cap spar can inset wings bottom surface removed droop wing tips easier covering tail surfaces require addition rudder elevator control surfaces simply marked outlines foam pencil sliced off sharp knife keep tail easily re Left Experiments showed performance model improved beit drive reduction enabiethe 05 motorto swing larger prop case 1 2g Drill cooling air inlets firewall simple wire skid protects front end Right Included shot authors other Electric models show front King Condor might cleaned up fiberglass cowl spinner June 1986 39 servos mounted common sheet plywood easy removal has sufficIent room aithouth cells receiver battery pack rearranged end-to-end Locate batteries far forward center gravity will correct movable epoxied -in dowel post rudder can rubberbanded place also allowed elevator horn located bottom side will necessary carve clearance fuselage wilt room linkages work elevators two pieces joined -in dowel channel cut stabilizer extension dowel clear ance After elevator hinged channel covered 6 sheet Although coat paint would have done just well probably covered tail surfaces ColorTex easy apply couldnt resist Fuselage could call modifications major fuselage occur first step shorten nose section 10 fuselage molding joint reference using triangle scribe guideline foam square joint line Using light pressure carefully cut off front model hacksaw blade dress surface sanding block battery cells should installed far forward achieve correct center gravity CG shortened noseand locate far away possible receiver Fabricate -in plywood motor MOTOR MOUNT I/B PLY 032 ALUM N2Z~42 SERVO SWITC1-I CAM nflnfl cjw TAP 4-40 mount shown leaving outside edge oversize now save weight steel blind nuts glue small pieces -in ply back motor mount provide thickness screw threads attach motor mount 4-40 machine screws motor attached mount make trial fit front fuselage Remove excess foam nose model until whole assembly can neatly positioned match fuselage contour Mark exact shape fuselage onto mount trim mount size Epoxy-glue mount foam Fabricate two switch plates 6 plywood inset foam flush fit Cut holes through foam backs switch plates wires motor power receiver batteries stuffed nose section through wing opening Remove excess internal foam obtain snug fit elected use standard-size receiver battery re arranged cells end-to-end config uration better suit available space Cut servo mount plate Y16-in plywood attach servos double-sticky servo tape Keep servos low plate clearance will allow Cut two pieces of-in dowel drill through accommodate #2 screw Countersink dowels recess screw head Cut holes through fuselage servo plate mounting bolts go epoxy two dowel pieces positioned flush internal surface servo mounting plate place mark holes glue reinforcing -in ply onto back plate give screw threads something grasp Hook up controls flexible pushrods can easily threaded through rear exit locations Epoxy pushrod outer tubing fuselage exit points wing opening trailing edge receiver simply stuffed fuselage aft servos bit foam should stuffed keep receiver rattling around However almost no vibration electric power usual shock mounting needed Continued page 142 ROflONNIW VN*QOOOL -o ozo 6 fl6PNSSET aifl-7LxIz2zr4T i-V ~1 BA B P 00TAP 4-40 4- * _____________________ PROP UI/S PLY MOTOR QIJY-c9- COOLING AIR PASSAGES COWL IAIR INLET FIBREGLASS COWL 10 1 PROPS ITO I2 DIAM 7T010 PITCH 3/4 SPINNER BELT REDUCTIOJ\ fIii 05 POWER UNIT 075 FERRITEII ASTRO 05 COBALT N BC POWER SWITCH & CHARGER P I L-L REMOVE 40 Model Aviation U Clearance rudder control horn cut out fuselage making neat installa tion Rudder elevators simply sliced off fin stabilizer sharp knife 9 Munson Avenue P C MODEL SUPPLY Bethany CT 06525 203 393-2934 Flight-Proven DesignsSend Brochure Balsa ConstructIon 5-6 lbs Cessna 150 40 Powered 62 Easy Const uction 10-15 brat Stable Fliers Mooney 40 Powered 62Scale Its Appearance Slow Flying Capabilities Cherokee 40 Powered 60 9 ea plus $250 UP5 Contest Proven place Cherokee Scale2OO~ plus 800 shipping Ken Barnes Cessna 15025 Powered 5038 plus $250 upS Firemaster Bipe5667 lbs 80 Powered 6996 Introductory Pricel Pack Kat 25 powered sport flyer low w ng span 44 Intro Price $2600 MasterCard Coming Seen 60 Powered Pattern ShipsDealers Invited MASTER AIRSCREW Z~RAIR REW 12x8 Folder1195 15x12 Folder .. 1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 DGA Designs 00 DGA00 DC4 Designs 0 0 0 C o5 oU 0 0 U C 0 1 OUARTER SCALE PLANS Ouarter Master Sport Bipe $21 Ouadra 35. 73Span.E-Z build. Great Flyer.5Seml-Kit Anailable.PPO 00 DAVIS DIK 905Span.s25 Ouadra 35 power similar. PD 01933 KINNEFt SPORTSTER U Model K.117 Span.035 power. Pea 4-CYCLE PROJECTS 0 o v AKRON FUNK SI 15 Scale 54 span 80 sizeSl 4 cyCle Fantastic FivePPD ____0 DAVIS DlKhh 603 Spar.D 45 4 cyCle Similar..Pea s15 hoc Inch wale Sixth scale3l _____________0 1933 KINNER SPORTSTER5 ID Model K.7a Span. 51-754 cy Pea ap PhotO reduced 14 Scale plans o TWO Inch scate Seth scale 0________0 Mere 004 plane0 coming PHOTO DOCUMENTATION PACKS availableon Scale Plans SI ALL PLANS ROLLED SHIPPED UPS O Complete wlnstrOcf ion SookICt Send siDO Catalog O Nem York State Residents add 7% sales tax. Send check 5 O MO COOS. Allow 3meeke chesktocleer U length engine run given amount fuel laminations made Elmers woodworking glue After carving sanding prop rubbed-on coat clear dope used seal After rubbing down steel wool finished clear polyurethane spray can final balance sprayed little finish onto lighter blade beginner get experienced RC flier test-fly model First check flight pack battery sufficient charge see controls work freely respond correctly radio signals Fill tank Cox fuel fire up engine bring peak rpm richen needle valve just trifle Hand-launch model gently shoulder height level attitude directly wind running few steps Later after needed trimming has done can launch flat-footed Im mediately make necessary transmitter trim adjustments two models flew virtually no trimming needed model flies smoothly climbs well responsive control movements loops easily will spin stalled given full-left full-up control Recovery immediate controls neutralized proper trim transmitter Henry T flies hands-off Takeoffs landings particularly enjoyable because model tracks straight little tendency veer ground loop fly buoyant air prepared long glide extended soaring try fly model misaligned warped surface balance point CG rearward spar location cautious use down-flap settingsuse sparingly Several friends have discussed building enlarged versions model usually 6-ft-span size 15 engine writing own preference something larger would near-6-ft-span version altered airfoil having shallow convex lower surface operable flaps ailerons 40-size four-stroke engine Henry T has given lots pleas ure hours relaxed air time abso lutely minimum cost decide build good luck pleasant flying Radio Technique/Myers Continued page 37 Carl Goldberg Bob Novak Descriptions honorees accomplishments presented article November 1985 issue Flying Models page 32 et seq award memorializes Howard McEntee great early creators RC hobby Beginning articles single-channel RC 27255 MHz published Air Trails early 1950s continuing column American Air craft Modeller till time death summer 1972 Howard McEntee patiently educated whole generation modelers including Howard became famous publishing designs transmitters receivers actuators etc worked Radio Tech nique modeled anything modeled Howards writings award given have made significant contribution RC hobby Looking names above wonder what have contributed deserve honor best can figure 10 years have covered lot subjects have thank letters experts novators have shared knowledge could give accurate timely informa tion Carl Wheeley Bill Winter Ross McMullen giving wide latitude pick ing subjects column Bob Aberle ing friend critic needed John Worth advice Good Lord putting position write could use particular education experiences advantage examining understanding RC problems write about humbly thank Bob Foshay Mrs Clark WRAMs honor George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Electric Condor/deBolt Continued page 40 motor on-off microswitch oper ated simple cam arrangement offers large dead band eliminating need precise finicky adjustments original cam made sheet alumi num 1/5$ ply would work well cam servo locate switch plywood correct operation oc 142 Model Aviation HARRYS WHEEL COLLAR WRENCH hardened steel FOR 15 AXLES 5/32 AXLES LARGER AXlES S279 EACH HARRY B HIGLEY 8 SONS INC p o Box 532 GLENWOOD ILL 60425 U miJu ml i ICI Breed SechslDeImarLIghtest weight read y-te-m@unt enginesi TG Mfg 857 HIgh Mountain Rd North Haledon NJ 07508 427-3845 curs Locate switch mounting screw holes mount switch Cut off original landing bump bottom fuselage will result hole will serve exit cooling air Cut second hole aft provide additional heat exit Put underlayer glass cloth resin over motor mount plywood additional strength cover entire fuselage layer 1 Yz-oz cloth resin cowl essential keeping simple-to-build philosophy original model flown extensively out Making cowl fairly simple however improves appearance great ly steps follows Fabricate h-in balsa cowl former key around belt drive base motor mount 4a plywood spinner backplate tightly fitted onto outside propeller drive washer space around motor pulleys between backplate cowl former filled gobs Styrofoam Carve sand foam desired cowl shape cover three layers glass cloth/resin completed remove fuselage dig out Styro foam provide needed clearance cowl keyed place former attached two screws Flying balance point CG 4 aft wing leading edge overly critical design followed procedures actual location should come out very close trim adjusting done stabil izer design uses lifting tail positive incidence can added stabilizer trimming purposes no problems resulting No 1 consideration Electrics dont have excessive power typical glow engines Think before act dont put model situation would require abnormal power recovery you will get along fine adequate power avail able launching procedure switch motor run couple steps push model directly forward level atti tude should stay launch altitude few feet begin gentle climb like can let model stay pointed wind find its best angle climb elevator model should reach soaring altitude short period Otherwise can hold level flight circle field hearts desire King Condor no slow poke big trainer decent maneuvers stall turns inside loops should forget precision flight figure eights procedure turns etc hours flying experimenting different motor configurations have taught us couple things First electric power can applied two ways directly through belt drive direct drive did impress us way little 7-in prop can pull large model performance considerably less system using belt reduction drive larger prop As would expected 1 l-in-dia prop better matched models size produces noticeable improvement performance Secondly 54-oz model considered lead sled far specialized Electric designs go after experimenting prop modifica tions dramatic increase thrust point model suitable electric-powered duration flyingto least just below competition level experience would certainly suggest King Condor Electric trainer get indoctrination fascinating kind flight original RB-i King Condor kit available local hobby dealer may ordered Goliath Whirlwind Aircraft Inc PO Box 589 Lathrup Village MI 48076 $3995 including ship ping handling MI residents add sales tax Master Visa cards accepted responding advertisers mention read about Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 743Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly5795 Add 53 postage handling first 2 packages 10% additional PO 8ox68132 AIRCRAFT CO Portland OR 97268 June 1986 143 31 -$27500 34- $34500 37- $35500 42 -$37500 Roush Laser Kltted TG Engines Complete RegS24995 wjlasrdmrekk-S275S5 NothingExtretoBuy L4ShS22 SUP 87SIbS4Z4tIIP 4J-Sa Option engines Throttle-coupled spark advance Features Custemized newest German engines net parts Mufflere Mount ting Bolte Presaure Tap far Smek Cubeseter Usilme Inldesi CH Eleotronlcs Ignition Peck ty SwItch ft l4ub stor Spk Pigs Warranty Panity Puts WedusensNp RAINBOW RUNNER 25 or 45 Gfl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 HODDY HAMMER INCLUDES5 Steel Brass n Tip specify extra tip ordering Send Check Money Order MEtWMODELS P0 Box 6627 Huntington Beach CA 92615 714 9621703 Add 150 Post & HandCA Res add 6% tan
Edition: Model Aviation - 1986/06
Page Numbers: 38, 39, 40, 142, 143
In background King Condor comes originally rubber-powered Free Flight foam ARF foregrouna electric powered RC conversion original model 22 oz conversion RC gear electric motor system weighs 54 oz INTERESTED electric-powered model flight Before electrified thoughts get short-circuited read Offered perhaps quickest simplest least expensive way investigate intriguing different method RC flying Electric power has available model use over 15 years now apparent offers some exclusive ad vantages past considering power source modelers compared glow engines advantages Electric flight quickly dimmed tough give up ample engine power restricted performance electric motors initially offered youve paying attention may have noticed giant strides have made Electric power systems last few years now possible elec trically duplicate glow engine power up about 40 cu size range enough good sport flying Lots modelers finding enjoyable perform ance much smaller less ex pensive 05 motors Along increase electric motor power has come significant reduction system weight electric power may never match glow power weight basis modelers finding Electric systems have Intended simple inex pensive vehicle help decide Electrics modified foam model also turned out have surprising per formance thermaling ability EHal deBolt enough power make planes flyand fly well simple solu tion design model structure eliminate excess strength weight wasnt needed attractive power source must also affordable Glow engines have around long enough offer us pretty good power-to-dollar ratioas yet unmatched Electrics Paul MacCready has shown us some wonderful things can done electric solar power heavy financial backing Fortunately now seeing Electric systems models dont shock pocketbooks youll pardon another pun filling needs line thinking have forget about comparing various power sources concentrate basic requirement average-sized model enough performance enjoyment accounts great popularity various 05size Electric systems cost falls range good sport engine similarsized models 05 performance has proven quite satisfactory have following Electric Electric King Condor Trainer 38 Model Aviation scene may about ready give try advantages silent powered flight no messy fuel no engine start fuss minimum cost per flight very appealing have hang-up wanting normal modeling activity suffer find out whether like Electrics solution find quick-tobuild inexpensive model thats exactly what offered youve asked yourself whether average modeler can have successful rewarding flights using accustomed build ing methods materials stock electric motor power system standard RC gear Im happy say answer yes model proof proof also can done changing lifestyle However should realize electric power major change glow engines will have some relearning mind wise heed advice have paved way us Electric flight use trainer-type model start After youve learned principles Electric operation flight can put big effort Electric masterpiece particular Electric trainer intended teach rank beginner fly experienced modeler learn basics ofthis new type power fills design requirements readily obtainable inexpensive simple put together things make initial lessons about Electric flying painless possible As added bonus provides some very delightful fun flying Electric gurus tell us Electric trainer should glider variety enough wing area light loading rather slow flight equates about 600 sq wing area 05 motors consideration plus concepts minimum cost time investment choices narrowed Styrofoam ARF category kit models Without too much effort came upon two molded foam offerings filled bill Previous experience both models indicated offered excellent performance aerodynamic qualities quite suitable Electric flight First two candidates Lazy Bird Midwest Products Two-Meter Sailplane other King Condor giant-sized rubber-powered model pro duced Goliath Whirlwind Aircraft Co Both models could con verted easily accommodate battery cells electric motor chose King Condor next step obtain necessary Electric items Astro Flight #6505 flight system #4005B charger #4018 belt reduction unit #4032 microswitch similar items available Leisure Electronics assembled model Jet cyano acrylate CyA covered Gold bergs ColorTex Construction major consideration King Condor conversion designed fly very slowly weight 22 oz conversion Electric doubled weight 54 oz model flying speeds greatly increased over original rubber-powered version Happily needed strengthening can accomplished easily adds longevity basic foam structure began epoxy-gluing two-part wing together center fiber glassing joint normal manner Condor has weight wing rubber-power flight control purposes re move weight will needed RC add strength plain foam wing decided use stressed skin method covering ColorTex material has greater tensional strength plastic iron-on films compatible foam since low heat used anyone believes strength desired 1/16 x -in sheet cap spar can inset wings bottom surface removed droop wing tips easier covering tail surfaces require addition rudder elevator control surfaces simply marked outlines foam pencil sliced off sharp knife keep tail easily re Left Experiments showed performance model improved beit drive reduction enabiethe 05 motorto swing larger prop case 1 2g Drill cooling air inlets firewall simple wire skid protects front end Right Included shot authors other Electric models show front King Condor might cleaned up fiberglass cowl spinner June 1986 39 servos mounted common sheet plywood easy removal has sufficIent room aithouth cells receiver battery pack rearranged end-to-end Locate batteries far forward center gravity will correct movable epoxied -in dowel post rudder can rubberbanded place also allowed elevator horn located bottom side will necessary carve clearance fuselage wilt room linkages work elevators two pieces joined -in dowel channel cut stabilizer extension dowel clear ance After elevator hinged channel covered 6 sheet Although coat paint would have done just well probably covered tail surfaces ColorTex easy apply couldnt resist Fuselage could call modifications major fuselage occur first step shorten nose section 10 fuselage molding joint reference using triangle scribe guideline foam square joint line Using light pressure carefully cut off front model hacksaw blade dress surface sanding block battery cells should installed far forward achieve correct center gravity CG shortened noseand locate far away possible receiver Fabricate -in plywood motor MOTOR MOUNT I/B PLY 032 ALUM N2Z~42 SERVO SWITC1-I CAM nflnfl cjw TAP 4-40 mount shown leaving outside edge oversize now save weight steel blind nuts glue small pieces -in ply back motor mount provide thickness screw threads attach motor mount 4-40 machine screws motor attached mount make trial fit front fuselage Remove excess foam nose model until whole assembly can neatly positioned match fuselage contour Mark exact shape fuselage onto mount trim mount size Epoxy-glue mount foam Fabricate two switch plates 6 plywood inset foam flush fit Cut holes through foam backs switch plates wires motor power receiver batteries stuffed nose section through wing opening Remove excess internal foam obtain snug fit elected use standard-size receiver battery re arranged cells end-to-end config uration better suit available space Cut servo mount plate Y16-in plywood attach servos double-sticky servo tape Keep servos low plate clearance will allow Cut two pieces of-in dowel drill through accommodate #2 screw Countersink dowels recess screw head Cut holes through fuselage servo plate mounting bolts go epoxy two dowel pieces positioned flush internal surface servo mounting plate place mark holes glue reinforcing -in ply onto back plate give screw threads something grasp Hook up controls flexible pushrods can easily threaded through rear exit locations Epoxy pushrod outer tubing fuselage exit points wing opening trailing edge receiver simply stuffed fuselage aft servos bit foam should stuffed keep receiver rattling around However almost no vibration electric power usual shock mounting needed Continued page 142 ROflONNIW VN*QOOOL -o ozo 6 fl6PNSSET aifl-7LxIz2zr4T i-V ~1 BA B P 00TAP 4-40 4- * _____________________ PROP UI/S PLY MOTOR QIJY-c9- COOLING AIR PASSAGES COWL IAIR INLET FIBREGLASS COWL 10 1 PROPS ITO I2 DIAM 7T010 PITCH 3/4 SPINNER BELT REDUCTIOJ\ fIii 05 POWER UNIT 075 FERRITEII ASTRO 05 COBALT N BC POWER SWITCH & CHARGER P I L-L REMOVE 40 Model Aviation U Clearance rudder control horn cut out fuselage making neat installa tion Rudder elevators simply sliced off fin stabilizer sharp knife 9 Munson Avenue P C MODEL SUPPLY Bethany CT 06525 203 393-2934 Flight-Proven DesignsSend Brochure Balsa ConstructIon 5-6 lbs Cessna 150 40 Powered 62 Easy Const uction 10-15 brat Stable Fliers Mooney 40 Powered 62Scale Its Appearance Slow Flying Capabilities Cherokee 40 Powered 60 9 ea plus $250 UP5 Contest Proven place Cherokee Scale2OO~ plus 800 shipping Ken Barnes Cessna 15025 Powered 5038 plus $250 upS Firemaster Bipe5667 lbs 80 Powered 6996 Introductory Pricel Pack Kat 25 powered sport flyer low w ng span 44 Intro Price $2600 MasterCard Coming Seen 60 Powered Pattern ShipsDealers Invited MASTER AIRSCREW Z~RAIR REW 12x8 Folder1195 15x12 Folder .. 1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 DGA Designs 00 DGA00 DC4 Designs 0 0 0 C o5 oU 0 0 U C 0 1 OUARTER SCALE PLANS Ouarter Master Sport Bipe $21 Ouadra 35. 73Span.E-Z build. Great Flyer.5Seml-Kit Anailable.PPO 00 DAVIS DIK 905Span.s25 Ouadra 35 power similar. PD 01933 KINNEFt SPORTSTER U Model K.117 Span.035 power. Pea 4-CYCLE PROJECTS 0 o v AKRON FUNK SI 15 Scale 54 span 80 sizeSl 4 cyCle Fantastic FivePPD ____0 DAVIS DlKhh 603 Spar.D 45 4 cyCle Similar..Pea s15 hoc Inch wale Sixth scale3l _____________0 1933 KINNER SPORTSTER5 ID Model K.7a Span. 51-754 cy Pea ap PhotO reduced 14 Scale plans o TWO Inch scate Seth scale 0________0 Mere 004 plane0 coming PHOTO DOCUMENTATION PACKS availableon Scale Plans SI ALL PLANS ROLLED SHIPPED UPS O Complete wlnstrOcf ion SookICt Send siDO Catalog O Nem York State Residents add 7% sales tax. Send check 5 O MO COOS. Allow 3meeke chesktocleer U length engine run given amount fuel laminations made Elmers woodworking glue After carving sanding prop rubbed-on coat clear dope used seal After rubbing down steel wool finished clear polyurethane spray can final balance sprayed little finish onto lighter blade beginner get experienced RC flier test-fly model First check flight pack battery sufficient charge see controls work freely respond correctly radio signals Fill tank Cox fuel fire up engine bring peak rpm richen needle valve just trifle Hand-launch model gently shoulder height level attitude directly wind running few steps Later after needed trimming has done can launch flat-footed Im mediately make necessary transmitter trim adjustments two models flew virtually no trimming needed model flies smoothly climbs well responsive control movements loops easily will spin stalled given full-left full-up control Recovery immediate controls neutralized proper trim transmitter Henry T flies hands-off Takeoffs landings particularly enjoyable because model tracks straight little tendency veer ground loop fly buoyant air prepared long glide extended soaring try fly model misaligned warped surface balance point CG rearward spar location cautious use down-flap settingsuse sparingly Several friends have discussed building enlarged versions model usually 6-ft-span size 15 engine writing own preference something larger would near-6-ft-span version altered airfoil having shallow convex lower surface operable flaps ailerons 40-size four-stroke engine Henry T has given lots pleas ure hours relaxed air time abso lutely minimum cost decide build good luck pleasant flying Radio Technique/Myers Continued page 37 Carl Goldberg Bob Novak Descriptions honorees accomplishments presented article November 1985 issue Flying Models page 32 et seq award memorializes Howard McEntee great early creators RC hobby Beginning articles single-channel RC 27255 MHz published Air Trails early 1950s continuing column American Air craft Modeller till time death summer 1972 Howard McEntee patiently educated whole generation modelers including Howard became famous publishing designs transmitters receivers actuators etc worked Radio Tech nique modeled anything modeled Howards writings award given have made significant contribution RC hobby Looking names above wonder what have contributed deserve honor best can figure 10 years have covered lot subjects have thank letters experts novators have shared knowledge could give accurate timely informa tion Carl Wheeley Bill Winter Ross McMullen giving wide latitude pick ing subjects column Bob Aberle ing friend critic needed John Worth advice Good Lord putting position write could use particular education experiences advantage examining understanding RC problems write about humbly thank Bob Foshay Mrs Clark WRAMs honor George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Electric Condor/deBolt Continued page 40 motor on-off microswitch oper ated simple cam arrangement offers large dead band eliminating need precise finicky adjustments original cam made sheet alumi num 1/5$ ply would work well cam servo locate switch plywood correct operation oc 142 Model Aviation HARRYS WHEEL COLLAR WRENCH hardened steel FOR 15 AXLES 5/32 AXLES LARGER AXlES S279 EACH HARRY B HIGLEY 8 SONS INC p o Box 532 GLENWOOD ILL 60425 U miJu ml i ICI Breed SechslDeImarLIghtest weight read y-te-m@unt enginesi TG Mfg 857 HIgh Mountain Rd North Haledon NJ 07508 427-3845 curs Locate switch mounting screw holes mount switch Cut off original landing bump bottom fuselage will result hole will serve exit cooling air Cut second hole aft provide additional heat exit Put underlayer glass cloth resin over motor mount plywood additional strength cover entire fuselage layer 1 Yz-oz cloth resin cowl essential keeping simple-to-build philosophy original model flown extensively out Making cowl fairly simple however improves appearance great ly steps follows Fabricate h-in balsa cowl former key around belt drive base motor mount 4a plywood spinner backplate tightly fitted onto outside propeller drive washer space around motor pulleys between backplate cowl former filled gobs Styrofoam Carve sand foam desired cowl shape cover three layers glass cloth/resin completed remove fuselage dig out Styro foam provide needed clearance cowl keyed place former attached two screws Flying balance point CG 4 aft wing leading edge overly critical design followed procedures actual location should come out very close trim adjusting done stabil izer design uses lifting tail positive incidence can added stabilizer trimming purposes no problems resulting No 1 consideration Electrics dont have excessive power typical glow engines Think before act dont put model situation would require abnormal power recovery you will get along fine adequate power avail able launching procedure switch motor run couple steps push model directly forward level atti tude should stay launch altitude few feet begin gentle climb like can let model stay pointed wind find its best angle climb elevator model should reach soaring altitude short period Otherwise can hold level flight circle field hearts desire King Condor no slow poke big trainer decent maneuvers stall turns inside loops should forget precision flight figure eights procedure turns etc hours flying experimenting different motor configurations have taught us couple things First electric power can applied two ways directly through belt drive direct drive did impress us way little 7-in prop can pull large model performance considerably less system using belt reduction drive larger prop As would expected 1 l-in-dia prop better matched models size produces noticeable improvement performance Secondly 54-oz model considered lead sled far specialized Electric designs go after experimenting prop modifica tions dramatic increase thrust point model suitable electric-powered duration flyingto least just below competition level experience would certainly suggest King Condor Electric trainer get indoctrination fascinating kind flight original RB-i King Condor kit available local hobby dealer may ordered Goliath Whirlwind Aircraft Inc PO Box 589 Lathrup Village MI 48076 $3995 including ship ping handling MI residents add sales tax Master Visa cards accepted responding advertisers mention read about Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 743Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly5795 Add 53 postage handling first 2 packages 10% additional PO 8ox68132 AIRCRAFT CO Portland OR 97268 June 1986 143 31 -$27500 34- $34500 37- $35500 42 -$37500 Roush Laser Kltted TG Engines Complete RegS24995 wjlasrdmrekk-S275S5 NothingExtretoBuy L4ShS22 SUP 87SIbS4Z4tIIP 4J-Sa Option engines Throttle-coupled spark advance Features Custemized newest German engines net parts Mufflere Mount ting Bolte Presaure Tap far Smek Cubeseter Usilme Inldesi CH Eleotronlcs Ignition Peck ty SwItch ft l4ub stor Spk Pigs Warranty Panity Puts WedusensNp RAINBOW RUNNER 25 or 45 Gfl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 HODDY HAMMER INCLUDES5 Steel Brass n Tip specify extra tip ordering Send Check Money Order MEtWMODELS P0 Box 6627 Huntington Beach CA 92615 714 9621703 Add 150 Post & HandCA Res add 6% tan
Edition: Model Aviation - 1986/06
Page Numbers: 38, 39, 40, 142, 143
In background King Condor comes originally rubber-powered Free Flight foam ARF foregrouna electric powered RC conversion original model 22 oz conversion RC gear electric motor system weighs 54 oz INTERESTED electric-powered model flight Before electrified thoughts get short-circuited read Offered perhaps quickest simplest least expensive way investigate intriguing different method RC flying Electric power has available model use over 15 years now apparent offers some exclusive ad vantages past considering power source modelers compared glow engines advantages Electric flight quickly dimmed tough give up ample engine power restricted performance electric motors initially offered youve paying attention may have noticed giant strides have made Electric power systems last few years now possible elec trically duplicate glow engine power up about 40 cu size range enough good sport flying Lots modelers finding enjoyable perform ance much smaller less ex pensive 05 motors Along increase electric motor power has come significant reduction system weight electric power may never match glow power weight basis modelers finding Electric systems have Intended simple inex pensive vehicle help decide Electrics modified foam model also turned out have surprising per formance thermaling ability EHal deBolt enough power make planes flyand fly well simple solu tion design model structure eliminate excess strength weight wasnt needed attractive power source must also affordable Glow engines have around long enough offer us pretty good power-to-dollar ratioas yet unmatched Electrics Paul MacCready has shown us some wonderful things can done electric solar power heavy financial backing Fortunately now seeing Electric systems models dont shock pocketbooks youll pardon another pun filling needs line thinking have forget about comparing various power sources concentrate basic requirement average-sized model enough performance enjoyment accounts great popularity various 05size Electric systems cost falls range good sport engine similarsized models 05 performance has proven quite satisfactory have following Electric Electric King Condor Trainer 38 Model Aviation scene may about ready give try advantages silent powered flight no messy fuel no engine start fuss minimum cost per flight very appealing have hang-up wanting normal modeling activity suffer find out whether like Electrics solution find quick-tobuild inexpensive model thats exactly what offered youve asked yourself whether average modeler can have successful rewarding flights using accustomed build ing methods materials stock electric motor power system standard RC gear Im happy say answer yes model proof proof also can done changing lifestyle However should realize electric power major change glow engines will have some relearning mind wise heed advice have paved way us Electric flight use trainer-type model start After youve learned principles Electric operation flight can put big effort Electric masterpiece particular Electric trainer intended teach rank beginner fly experienced modeler learn basics ofthis new type power fills design requirements readily obtainable inexpensive simple put together things make initial lessons about Electric flying painless possible As added bonus provides some very delightful fun flying Electric gurus tell us Electric trainer should glider variety enough wing area light loading rather slow flight equates about 600 sq wing area 05 motors consideration plus concepts minimum cost time investment choices narrowed Styrofoam ARF category kit models Without too much effort came upon two molded foam offerings filled bill Previous experience both models indicated offered excellent performance aerodynamic qualities quite suitable Electric flight First two candidates Lazy Bird Midwest Products Two-Meter Sailplane other King Condor giant-sized rubber-powered model pro duced Goliath Whirlwind Aircraft Co Both models could con verted easily accommodate battery cells electric motor chose King Condor next step obtain necessary Electric items Astro Flight #6505 flight system #4005B charger #4018 belt reduction unit #4032 microswitch similar items available Leisure Electronics assembled model Jet cyano acrylate CyA covered Gold bergs ColorTex Construction major consideration King Condor conversion designed fly very slowly weight 22 oz conversion Electric doubled weight 54 oz model flying speeds greatly increased over original rubber-powered version Happily needed strengthening can accomplished easily adds longevity basic foam structure began epoxy-gluing two-part wing together center fiber glassing joint normal manner Condor has weight wing rubber-power flight control purposes re move weight will needed RC add strength plain foam wing decided use stressed skin method covering ColorTex material has greater tensional strength plastic iron-on films compatible foam since low heat used anyone believes strength desired 1/16 x -in sheet cap spar can inset wings bottom surface removed droop wing tips easier covering tail surfaces require addition rudder elevator control surfaces simply marked outlines foam pencil sliced off sharp knife keep tail easily re Left Experiments showed performance model improved beit drive reduction enabiethe 05 motorto swing larger prop case 1 2g Drill cooling air inlets firewall simple wire skid protects front end Right Included shot authors other Electric models show front King Condor might cleaned up fiberglass cowl spinner June 1986 39 servos mounted common sheet plywood easy removal has sufficIent room aithouth cells receiver battery pack rearranged end-to-end Locate batteries far forward center gravity will correct movable epoxied -in dowel post rudder can rubberbanded place also allowed elevator horn located bottom side will necessary carve clearance fuselage wilt room linkages work elevators two pieces joined -in dowel channel cut stabilizer extension dowel clear ance After elevator hinged channel covered 6 sheet Although coat paint would have done just well probably covered tail surfaces ColorTex easy apply couldnt resist Fuselage could call modifications major fuselage occur first step shorten nose section 10 fuselage molding joint reference using triangle scribe guideline foam square joint line Using light pressure carefully cut off front model hacksaw blade dress surface sanding block battery cells should installed far forward achieve correct center gravity CG shortened noseand locate far away possible receiver Fabricate -in plywood motor MOTOR MOUNT I/B PLY 032 ALUM N2Z~42 SERVO SWITC1-I CAM nflnfl cjw TAP 4-40 mount shown leaving outside edge oversize now save weight steel blind nuts glue small pieces -in ply back motor mount provide thickness screw threads attach motor mount 4-40 machine screws motor attached mount make trial fit front fuselage Remove excess foam nose model until whole assembly can neatly positioned match fuselage contour Mark exact shape fuselage onto mount trim mount size Epoxy-glue mount foam Fabricate two switch plates 6 plywood inset foam flush fit Cut holes through foam backs switch plates wires motor power receiver batteries stuffed nose section through wing opening Remove excess internal foam obtain snug fit elected use standard-size receiver battery re arranged cells end-to-end config uration better suit available space Cut servo mount plate Y16-in plywood attach servos double-sticky servo tape Keep servos low plate clearance will allow Cut two pieces of-in dowel drill through accommodate #2 screw Countersink dowels recess screw head Cut holes through fuselage servo plate mounting bolts go epoxy two dowel pieces positioned flush internal surface servo mounting plate place mark holes glue reinforcing -in ply onto back plate give screw threads something grasp Hook up controls flexible pushrods can easily threaded through rear exit locations Epoxy pushrod outer tubing fuselage exit points wing opening trailing edge receiver simply stuffed fuselage aft servos bit foam should stuffed keep receiver rattling around However almost no vibration electric power usual shock mounting needed Continued page 142 ROflONNIW VN*QOOOL -o ozo 6 fl6PNSSET aifl-7LxIz2zr4T i-V ~1 BA B P 00TAP 4-40 4- * _____________________ PROP UI/S PLY MOTOR QIJY-c9- COOLING AIR PASSAGES COWL IAIR INLET FIBREGLASS COWL 10 1 PROPS ITO I2 DIAM 7T010 PITCH 3/4 SPINNER BELT REDUCTIOJ\ fIii 05 POWER UNIT 075 FERRITEII ASTRO 05 COBALT N BC POWER SWITCH & CHARGER P I L-L REMOVE 40 Model Aviation U Clearance rudder control horn cut out fuselage making neat installa tion Rudder elevators simply sliced off fin stabilizer sharp knife 9 Munson Avenue P C MODEL SUPPLY Bethany CT 06525 203 393-2934 Flight-Proven DesignsSend Brochure Balsa ConstructIon 5-6 lbs Cessna 150 40 Powered 62 Easy Const uction 10-15 brat Stable Fliers Mooney 40 Powered 62Scale Its Appearance Slow Flying Capabilities Cherokee 40 Powered 60 9 ea plus $250 UP5 Contest Proven place Cherokee Scale2OO~ plus 800 shipping Ken Barnes Cessna 15025 Powered 5038 plus $250 upS Firemaster Bipe5667 lbs 80 Powered 6996 Introductory Pricel Pack Kat 25 powered sport flyer low w ng span 44 Intro Price $2600 MasterCard Coming Seen 60 Powered Pattern ShipsDealers Invited MASTER AIRSCREW Z~RAIR REW 12x8 Folder1195 15x12 Folder .. 1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 DGA Designs 00 DGA00 DC4 Designs 0 0 0 C o5 oU 0 0 U C 0 1 OUARTER SCALE PLANS Ouarter Master Sport Bipe $21 Ouadra 35. 73Span.E-Z build. Great Flyer.5Seml-Kit Anailable.PPO 00 DAVIS DIK 905Span.s25 Ouadra 35 power similar. PD 01933 KINNEFt SPORTSTER U Model K.117 Span.035 power. Pea 4-CYCLE PROJECTS 0 o v AKRON FUNK SI 15 Scale 54 span 80 sizeSl 4 cyCle Fantastic FivePPD ____0 DAVIS DlKhh 603 Spar.D 45 4 cyCle Similar..Pea s15 hoc Inch wale Sixth scale3l _____________0 1933 KINNER SPORTSTER5 ID Model K.7a Span. 51-754 cy Pea ap PhotO reduced 14 Scale plans o TWO Inch scate Seth scale 0________0 Mere 004 plane0 coming PHOTO DOCUMENTATION PACKS availableon Scale Plans SI ALL PLANS ROLLED SHIPPED UPS O Complete wlnstrOcf ion SookICt Send siDO Catalog O Nem York State Residents add 7% sales tax. Send check 5 O MO COOS. Allow 3meeke chesktocleer U length engine run given amount fuel laminations made Elmers woodworking glue After carving sanding prop rubbed-on coat clear dope used seal After rubbing down steel wool finished clear polyurethane spray can final balance sprayed little finish onto lighter blade beginner get experienced RC flier test-fly model First check flight pack battery sufficient charge see controls work freely respond correctly radio signals Fill tank Cox fuel fire up engine bring peak rpm richen needle valve just trifle Hand-launch model gently shoulder height level attitude directly wind running few steps Later after needed trimming has done can launch flat-footed Im mediately make necessary transmitter trim adjustments two models flew virtually no trimming needed model flies smoothly climbs well responsive control movements loops easily will spin stalled given full-left full-up control Recovery immediate controls neutralized proper trim transmitter Henry T flies hands-off Takeoffs landings particularly enjoyable because model tracks straight little tendency veer ground loop fly buoyant air prepared long glide extended soaring try fly model misaligned warped surface balance point CG rearward spar location cautious use down-flap settingsuse sparingly Several friends have discussed building enlarged versions model usually 6-ft-span size 15 engine writing own preference something larger would near-6-ft-span version altered airfoil having shallow convex lower surface operable flaps ailerons 40-size four-stroke engine Henry T has given lots pleas ure hours relaxed air time abso lutely minimum cost decide build good luck pleasant flying Radio Technique/Myers Continued page 37 Carl Goldberg Bob Novak Descriptions honorees accomplishments presented article November 1985 issue Flying Models page 32 et seq award memorializes Howard McEntee great early creators RC hobby Beginning articles single-channel RC 27255 MHz published Air Trails early 1950s continuing column American Air craft Modeller till time death summer 1972 Howard McEntee patiently educated whole generation modelers including Howard became famous publishing designs transmitters receivers actuators etc worked Radio Tech nique modeled anything modeled Howards writings award given have made significant contribution RC hobby Looking names above wonder what have contributed deserve honor best can figure 10 years have covered lot subjects have thank letters experts novators have shared knowledge could give accurate timely informa tion Carl Wheeley Bill Winter Ross McMullen giving wide latitude pick ing subjects column Bob Aberle ing friend critic needed John Worth advice Good Lord putting position write could use particular education experiences advantage examining understanding RC problems write about humbly thank Bob Foshay Mrs Clark WRAMs honor George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Electric Condor/deBolt Continued page 40 motor on-off microswitch oper ated simple cam arrangement offers large dead band eliminating need precise finicky adjustments original cam made sheet alumi num 1/5$ ply would work well cam servo locate switch plywood correct operation oc 142 Model Aviation HARRYS WHEEL COLLAR WRENCH hardened steel FOR 15 AXLES 5/32 AXLES LARGER AXlES S279 EACH HARRY B HIGLEY 8 SONS INC p o Box 532 GLENWOOD ILL 60425 U miJu ml i ICI Breed SechslDeImarLIghtest weight read y-te-m@unt enginesi TG Mfg 857 HIgh Mountain Rd North Haledon NJ 07508 427-3845 curs Locate switch mounting screw holes mount switch Cut off original landing bump bottom fuselage will result hole will serve exit cooling air Cut second hole aft provide additional heat exit Put underlayer glass cloth resin over motor mount plywood additional strength cover entire fuselage layer 1 Yz-oz cloth resin cowl essential keeping simple-to-build philosophy original model flown extensively out Making cowl fairly simple however improves appearance great ly steps follows Fabricate h-in balsa cowl former key around belt drive base motor mount 4a plywood spinner backplate tightly fitted onto outside propeller drive washer space around motor pulleys between backplate cowl former filled gobs Styrofoam Carve sand foam desired cowl shape cover three layers glass cloth/resin completed remove fuselage dig out Styro foam provide needed clearance cowl keyed place former attached two screws Flying balance point CG 4 aft wing leading edge overly critical design followed procedures actual location should come out very close trim adjusting done stabil izer design uses lifting tail positive incidence can added stabilizer trimming purposes no problems resulting No 1 consideration Electrics dont have excessive power typical glow engines Think before act dont put model situation would require abnormal power recovery you will get along fine adequate power avail able launching procedure switch motor run couple steps push model directly forward level atti tude should stay launch altitude few feet begin gentle climb like can let model stay pointed wind find its best angle climb elevator model should reach soaring altitude short period Otherwise can hold level flight circle field hearts desire King Condor no slow poke big trainer decent maneuvers stall turns inside loops should forget precision flight figure eights procedure turns etc hours flying experimenting different motor configurations have taught us couple things First electric power can applied two ways directly through belt drive direct drive did impress us way little 7-in prop can pull large model performance considerably less system using belt reduction drive larger prop As would expected 1 l-in-dia prop better matched models size produces noticeable improvement performance Secondly 54-oz model considered lead sled far specialized Electric designs go after experimenting prop modifica tions dramatic increase thrust point model suitable electric-powered duration flyingto least just below competition level experience would certainly suggest King Condor Electric trainer get indoctrination fascinating kind flight original RB-i King Condor kit available local hobby dealer may ordered Goliath Whirlwind Aircraft Inc PO Box 589 Lathrup Village MI 48076 $3995 including ship ping handling MI residents add sales tax Master Visa cards accepted responding advertisers mention read about Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 743Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly5795 Add 53 postage handling first 2 packages 10% additional PO 8ox68132 AIRCRAFT CO Portland OR 97268 June 1986 143 31 -$27500 34- $34500 37- $35500 42 -$37500 Roush Laser Kltted TG Engines Complete RegS24995 wjlasrdmrekk-S275S5 NothingExtretoBuy L4ShS22 SUP 87SIbS4Z4tIIP 4J-Sa Option engines Throttle-coupled spark advance Features Custemized newest German engines net parts Mufflere Mount ting Bolte Presaure Tap far Smek Cubeseter Usilme Inldesi CH Eleotronlcs Ignition Peck ty SwItch ft l4ub stor Spk Pigs Warranty Panity Puts WedusensNp RAINBOW RUNNER 25 or 45 Gfl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 HODDY HAMMER INCLUDES5 Steel Brass n Tip specify extra tip ordering Send Check Money Order MEtWMODELS P0 Box 6627 Huntington Beach CA 92615 714 9621703 Add 150 Post & HandCA Res add 6% tan
Edition: Model Aviation - 1986/06
Page Numbers: 38, 39, 40, 142, 143
In background King Condor comes originally rubber-powered Free Flight foam ARF foregrouna electric powered RC conversion original model 22 oz conversion RC gear electric motor system weighs 54 oz INTERESTED electric-powered model flight Before electrified thoughts get short-circuited read Offered perhaps quickest simplest least expensive way investigate intriguing different method RC flying Electric power has available model use over 15 years now apparent offers some exclusive ad vantages past considering power source modelers compared glow engines advantages Electric flight quickly dimmed tough give up ample engine power restricted performance electric motors initially offered youve paying attention may have noticed giant strides have made Electric power systems last few years now possible elec trically duplicate glow engine power up about 40 cu size range enough good sport flying Lots modelers finding enjoyable perform ance much smaller less ex pensive 05 motors Along increase electric motor power has come significant reduction system weight electric power may never match glow power weight basis modelers finding Electric systems have Intended simple inex pensive vehicle help decide Electrics modified foam model also turned out have surprising per formance thermaling ability EHal deBolt enough power make planes flyand fly well simple solu tion design model structure eliminate excess strength weight wasnt needed attractive power source must also affordable Glow engines have around long enough offer us pretty good power-to-dollar ratioas yet unmatched Electrics Paul MacCready has shown us some wonderful things can done electric solar power heavy financial backing Fortunately now seeing Electric systems models dont shock pocketbooks youll pardon another pun filling needs line thinking have forget about comparing various power sources concentrate basic requirement average-sized model enough performance enjoyment accounts great popularity various 05size Electric systems cost falls range good sport engine similarsized models 05 performance has proven quite satisfactory have following Electric Electric King Condor Trainer 38 Model Aviation scene may about ready give try advantages silent powered flight no messy fuel no engine start fuss minimum cost per flight very appealing have hang-up wanting normal modeling activity suffer find out whether like Electrics solution find quick-tobuild inexpensive model thats exactly what offered youve asked yourself whether average modeler can have successful rewarding flights using accustomed build ing methods materials stock electric motor power system standard RC gear Im happy say answer yes model proof proof also can done changing lifestyle However should realize electric power major change glow engines will have some relearning mind wise heed advice have paved way us Electric flight use trainer-type model start After youve learned principles Electric operation flight can put big effort Electric masterpiece particular Electric trainer intended teach rank beginner fly experienced modeler learn basics ofthis new type power fills design requirements readily obtainable inexpensive simple put together things make initial lessons about Electric flying painless possible As added bonus provides some very delightful fun flying Electric gurus tell us Electric trainer should glider variety enough wing area light loading rather slow flight equates about 600 sq wing area 05 motors consideration plus concepts minimum cost time investment choices narrowed Styrofoam ARF category kit models Without too much effort came upon two molded foam offerings filled bill Previous experience both models indicated offered excellent performance aerodynamic qualities quite suitable Electric flight First two candidates Lazy Bird Midwest Products Two-Meter Sailplane other King Condor giant-sized rubber-powered model pro duced Goliath Whirlwind Aircraft Co Both models could con verted easily accommodate battery cells electric motor chose King Condor next step obtain necessary Electric items Astro Flight #6505 flight system #4005B charger #4018 belt reduction unit #4032 microswitch similar items available Leisure Electronics assembled model Jet cyano acrylate CyA covered Gold bergs ColorTex Construction major consideration King Condor conversion designed fly very slowly weight 22 oz conversion Electric doubled weight 54 oz model flying speeds greatly increased over original rubber-powered version Happily needed strengthening can accomplished easily adds longevity basic foam structure began epoxy-gluing two-part wing together center fiber glassing joint normal manner Condor has weight wing rubber-power flight control purposes re move weight will needed RC add strength plain foam wing decided use stressed skin method covering ColorTex material has greater tensional strength plastic iron-on films compatible foam since low heat used anyone believes strength desired 1/16 x -in sheet cap spar can inset wings bottom surface removed droop wing tips easier covering tail surfaces require addition rudder elevator control surfaces simply marked outlines foam pencil sliced off sharp knife keep tail easily re Left Experiments showed performance model improved beit drive reduction enabiethe 05 motorto swing larger prop case 1 2g Drill cooling air inlets firewall simple wire skid protects front end Right Included shot authors other Electric models show front King Condor might cleaned up fiberglass cowl spinner June 1986 39 servos mounted common sheet plywood easy removal has sufficIent room aithouth cells receiver battery pack rearranged end-to-end Locate batteries far forward center gravity will correct movable epoxied -in dowel post rudder can rubberbanded place also allowed elevator horn located bottom side will necessary carve clearance fuselage wilt room linkages work elevators two pieces joined -in dowel channel cut stabilizer extension dowel clear ance After elevator hinged channel covered 6 sheet Although coat paint would have done just well probably covered tail surfaces ColorTex easy apply couldnt resist Fuselage could call modifications major fuselage occur first step shorten nose section 10 fuselage molding joint reference using triangle scribe guideline foam square joint line Using light pressure carefully cut off front model hacksaw blade dress surface sanding block battery cells should installed far forward achieve correct center gravity CG shortened noseand locate far away possible receiver Fabricate -in plywood motor MOTOR MOUNT I/B PLY 032 ALUM N2Z~42 SERVO SWITC1-I CAM nflnfl cjw TAP 4-40 mount shown leaving outside edge oversize now save weight steel blind nuts glue small pieces -in ply back motor mount provide thickness screw threads attach motor mount 4-40 machine screws motor attached mount make trial fit front fuselage Remove excess foam nose model until whole assembly can neatly positioned match fuselage contour Mark exact shape fuselage onto mount trim mount size Epoxy-glue mount foam Fabricate two switch plates 6 plywood inset foam flush fit Cut holes through foam backs switch plates wires motor power receiver batteries stuffed nose section through wing opening Remove excess internal foam obtain snug fit elected use standard-size receiver battery re arranged cells end-to-end config uration better suit available space Cut servo mount plate Y16-in plywood attach servos double-sticky servo tape Keep servos low plate clearance will allow Cut two pieces of-in dowel drill through accommodate #2 screw Countersink dowels recess screw head Cut holes through fuselage servo plate mounting bolts go epoxy two dowel pieces positioned flush internal surface servo mounting plate place mark holes glue reinforcing -in ply onto back plate give screw threads something grasp Hook up controls flexible pushrods can easily threaded through rear exit locations Epoxy pushrod outer tubing fuselage exit points wing opening trailing edge receiver simply stuffed fuselage aft servos bit foam should stuffed keep receiver rattling around However almost no vibration electric power usual shock mounting needed Continued page 142 ROflONNIW VN*QOOOL -o ozo 6 fl6PNSSET aifl-7LxIz2zr4T i-V ~1 BA B P 00TAP 4-40 4- * _____________________ PROP UI/S PLY MOTOR QIJY-c9- COOLING AIR PASSAGES COWL IAIR INLET FIBREGLASS COWL 10 1 PROPS ITO I2 DIAM 7T010 PITCH 3/4 SPINNER BELT REDUCTIOJ\ fIii 05 POWER UNIT 075 FERRITEII ASTRO 05 COBALT N BC POWER SWITCH & CHARGER P I L-L REMOVE 40 Model Aviation U Clearance rudder control horn cut out fuselage making neat installa tion Rudder elevators simply sliced off fin stabilizer sharp knife 9 Munson Avenue P C MODEL SUPPLY Bethany CT 06525 203 393-2934 Flight-Proven DesignsSend Brochure Balsa ConstructIon 5-6 lbs Cessna 150 40 Powered 62 Easy Const uction 10-15 brat Stable Fliers Mooney 40 Powered 62Scale Its Appearance Slow Flying Capabilities Cherokee 40 Powered 60 9 ea plus $250 UP5 Contest Proven place Cherokee Scale2OO~ plus 800 shipping Ken Barnes Cessna 15025 Powered 5038 plus $250 upS Firemaster Bipe5667 lbs 80 Powered 6996 Introductory Pricel Pack Kat 25 powered sport flyer low w ng span 44 Intro Price $2600 MasterCard Coming Seen 60 Powered Pattern ShipsDealers Invited MASTER AIRSCREW Z~RAIR REW 12x8 Folder1195 15x12 Folder .. 1295 05 Direct Drive Prop Adapter395 Available thru Dealer WINDSOR PROPELLER CO 384 Tesconi Ct Santa Rosa CA 95401 DGA Designs 00 DGA00 DC4 Designs 0 0 0 C o5 oU 0 0 U C 0 1 OUARTER SCALE PLANS Ouarter Master Sport Bipe $21 Ouadra 35. 73Span.E-Z build. Great Flyer.5Seml-Kit Anailable.PPO 00 DAVIS DIK 905Span.s25 Ouadra 35 power similar. PD 01933 KINNEFt SPORTSTER U Model K.117 Span.035 power. Pea 4-CYCLE PROJECTS 0 o v AKRON FUNK SI 15 Scale 54 span 80 sizeSl 4 cyCle Fantastic FivePPD ____0 DAVIS DlKhh 603 Spar.D 45 4 cyCle Similar..Pea s15 hoc Inch wale Sixth scale3l _____________0 1933 KINNER SPORTSTER5 ID Model K.7a Span. 51-754 cy Pea ap PhotO reduced 14 Scale plans o TWO Inch scate Seth scale 0________0 Mere 004 plane0 coming PHOTO DOCUMENTATION PACKS availableon Scale Plans SI ALL PLANS ROLLED SHIPPED UPS O Complete wlnstrOcf ion SookICt Send siDO Catalog O Nem York State Residents add 7% sales tax. Send check 5 O MO COOS. Allow 3meeke chesktocleer U length engine run given amount fuel laminations made Elmers woodworking glue After carving sanding prop rubbed-on coat clear dope used seal After rubbing down steel wool finished clear polyurethane spray can final balance sprayed little finish onto lighter blade beginner get experienced RC flier test-fly model First check flight pack battery sufficient charge see controls work freely respond correctly radio signals Fill tank Cox fuel fire up engine bring peak rpm richen needle valve just trifle Hand-launch model gently shoulder height level attitude directly wind running few steps Later after needed trimming has done can launch flat-footed Im mediately make necessary transmitter trim adjustments two models flew virtually no trimming needed model flies smoothly climbs well responsive control movements loops easily will spin stalled given full-left full-up control Recovery immediate controls neutralized proper trim transmitter Henry T flies hands-off Takeoffs landings particularly enjoyable because model tracks straight little tendency veer ground loop fly buoyant air prepared long glide extended soaring try fly model misaligned warped surface balance point CG rearward spar location cautious use down-flap settingsuse sparingly Several friends have discussed building enlarged versions model usually 6-ft-span size 15 engine writing own preference something larger would near-6-ft-span version altered airfoil having shallow convex lower surface operable flaps ailerons 40-size four-stroke engine Henry T has given lots pleas ure hours relaxed air time abso lutely minimum cost decide build good luck pleasant flying Radio Technique/Myers Continued page 37 Carl Goldberg Bob Novak Descriptions honorees accomplishments presented article November 1985 issue Flying Models page 32 et seq award memorializes Howard McEntee great early creators RC hobby Beginning articles single-channel RC 27255 MHz published Air Trails early 1950s continuing column American Air craft Modeller till time death summer 1972 Howard McEntee patiently educated whole generation modelers including Howard became famous publishing designs transmitters receivers actuators etc worked Radio Tech nique modeled anything modeled Howards writings award given have made significant contribution RC hobby Looking names above wonder what have contributed deserve honor best can figure 10 years have covered lot subjects have thank letters experts novators have shared knowledge could give accurate timely informa tion Carl Wheeley Bill Winter Ross McMullen giving wide latitude pick ing subjects column Bob Aberle ing friend critic needed John Worth advice Good Lord putting position write could use particular education experiences advantage examining understanding RC problems write about humbly thank Bob Foshay Mrs Clark WRAMs honor George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Electric Condor/deBolt Continued page 40 motor on-off microswitch oper ated simple cam arrangement offers large dead band eliminating need precise finicky adjustments original cam made sheet alumi num 1/5$ ply would work well cam servo locate switch plywood correct operation oc 142 Model Aviation HARRYS WHEEL COLLAR WRENCH hardened steel FOR 15 AXLES 5/32 AXLES LARGER AXlES S279 EACH HARRY B HIGLEY 8 SONS INC p o Box 532 GLENWOOD ILL 60425 U miJu ml i ICI Breed SechslDeImarLIghtest weight read y-te-m@unt enginesi TG Mfg 857 HIgh Mountain Rd North Haledon NJ 07508 427-3845 curs Locate switch mounting screw holes mount switch Cut off original landing bump bottom fuselage will result hole will serve exit cooling air Cut second hole aft provide additional heat exit Put underlayer glass cloth resin over motor mount plywood additional strength cover entire fuselage layer 1 Yz-oz cloth resin cowl essential keeping simple-to-build philosophy original model flown extensively out Making cowl fairly simple however improves appearance great ly steps follows Fabricate h-in balsa cowl former key around belt drive base motor mount 4a plywood spinner backplate tightly fitted onto outside propeller drive washer space around motor pulleys between backplate cowl former filled gobs Styrofoam Carve sand foam desired cowl shape cover three layers glass cloth/resin completed remove fuselage dig out Styro foam provide needed clearance cowl keyed place former attached two screws Flying balance point CG 4 aft wing leading edge overly critical design followed procedures actual location should come out very close trim adjusting done stabil izer design uses lifting tail positive incidence can added stabilizer trimming purposes no problems resulting No 1 consideration Electrics dont have excessive power typical glow engines Think before act dont put model situation would require abnormal power recovery you will get along fine adequate power avail able launching procedure switch motor run couple steps push model directly forward level atti tude should stay launch altitude few feet begin gentle climb like can let model stay pointed wind find its best angle climb elevator model should reach soaring altitude short period Otherwise can hold level flight circle field hearts desire King Condor no slow poke big trainer decent maneuvers stall turns inside loops should forget precision flight figure eights procedure turns etc hours flying experimenting different motor configurations have taught us couple things First electric power can applied two ways directly through belt drive direct drive did impress us way little 7-in prop can pull large model performance considerably less system using belt reduction drive larger prop As would expected 1 l-in-dia prop better matched models size produces noticeable improvement performance Secondly 54-oz model considered lead sled far specialized Electric designs go after experimenting prop modifica tions dramatic increase thrust point model suitable electric-powered duration flyingto least just below competition level experience would certainly suggest King Condor Electric trainer get indoctrination fascinating kind flight original RB-i King Condor kit available local hobby dealer may ordered Goliath Whirlwind Aircraft Inc PO Box 589 Lathrup Village MI 48076 $3995 including ship ping handling MI residents add sales tax Master Visa cards accepted responding advertisers mention read about Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 743Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly5795 Add 53 postage handling first 2 packages 10% additional PO 8ox68132 AIRCRAFT CO Portland OR 97268 June 1986 143 31 -$27500 34- $34500 37- $35500 42 -$37500 Roush Laser Kltted TG Engines Complete RegS24995 wjlasrdmrekk-S275S5 NothingExtretoBuy L4ShS22 SUP 87SIbS4Z4tIIP 4J-Sa Option engines Throttle-coupled spark advance Features Custemized newest German engines net parts Mufflere Mount ting Bolte Presaure Tap far Smek Cubeseter Usilme Inldesi CH Eleotronlcs Ignition Peck ty SwItch ft l4ub stor Spk Pigs Warranty Panity Puts WedusensNp RAINBOW RUNNER 25 or 45 Gfl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 HODDY HAMMER INCLUDES5 Steel Brass n Tip specify extra tip ordering Send Check Money Order MEtWMODELS P0 Box 6627 Huntington Beach CA 92615 714 9621703 Add 150 Post & HandCA Res add 6% tan
Edition: Model Aviation - 1986/06
Page Numbers: 38, 39, 40, 142, 143
In background King Condor comes originally rubber-powered Free Flight foam ARF foregrouna electric powered RC conversion original model 22 oz conversion RC gear electric motor system weighs 54 oz INTERESTED electric-powered model flight Before electrified thoughts get short-circuited read Offered perhaps quickest simplest least expensive way investigate intriguing different method RC flying Electric power has available model use over 15 years now apparent offers some exclusive ad vantages past considering power source modelers compared glow engines advantages Electric flight quickly dimmed tough give up ample engine power restricted performance electric motors initially offered youve paying attention may have noticed giant strides have made Electric power systems last few years now possible elec trically duplicate glow engine power up about 40 cu size range enough good sport flying Lots modelers finding enjoyable perform ance much smaller less ex pensive 05 motors Along increase electric motor power has come significant reduction system weight electric power may never match glow power weight basis modelers finding Electric systems have Intended simple inex pensive vehicle help decide Electrics modified foam model also turned out have surprising per formance thermaling ability EHal deBolt enough power make planes flyand fly well simple solu tion design model structure eliminate excess strength weight wasnt needed attractive power source must also affordable Glow engines have around long enough offer us pretty good power-to-dollar ratioas yet unmatched Electrics Paul MacCready has shown us some wonderful things can done electric solar power heavy financial backing Fortunately now seeing Electric systems models dont shock pocketbooks youll pardon another pun filling needs line thinking have forget about comparing various power sources concentrate basic requirement average-sized model enough performance enjoyment accounts great popularity various 05size Electric systems cost falls range good sport engine similarsized models 05 performance has proven quite satisfactory have following Electric Electric King Condor Trainer 38 Model Aviation scene may about ready give try advantages silent powered flight no messy fuel no engine start fuss minimum cost per flight very appealing have hang-up wanting normal modeling activity suffer find out whether like Electrics solution find quick-tobuild inexpensive model thats exactly what offered youve asked yourself whether average modeler can have successful rewarding flights using accustomed build ing methods materials stock electric motor power system standard RC gear Im happy say answer yes model proof proof also can done changing lifestyle However should realize electric power major change glow engines will have some relearning mind wise heed advice have paved way us Electric flight use trainer-type model start After youve learned principles Electric operation flight can put big effort Electric masterpiece particular Electric trainer intended teach rank beginner fly experienced modeler learn basics ofthis new type power fills design requirements readily obtainable inexpensive simple put together things make initial lessons about Electric flying painless possible As added bonus provides some very delightful fun flying Electric gurus tell us Electric trainer should glider variety enough wing area light loading rather slow flight equates about 600 sq wing area 05 motors consideration plus concepts minimum cost time investment choices narrowed Styrofoam ARF category kit models Without too much effort came upon two molded foam offerings filled bill Previous experience both models indicated offered excellent performance aerodynamic qualities quite suitable Electric flight First two candidates Lazy Bird Midwest Products Two-Meter Sailplane other King Condor giant-sized rubber-powered model pro duced Goliath Whirlwind Aircraft Co Both models could con verted easily accommodate battery cells electric motor chose King Condor next step obtain necessary Electric items Astro Flight #6505 flight system #4005B charger #4018 belt reduction unit #4032 microswitch similar items available Leisure Electronics assembled model Jet cyano acrylate CyA covered Gold bergs ColorTex Construction major consideration King Condor conversion designed fly very slowly weight 22 oz conversion Electric doubled weight 54 oz model flying speeds greatly increased over original rubber-powered version Happily needed strengthening can accomplished easily adds longevity basic foam structure began epoxy-gluing two-part wing together center fiber glassing joint normal manner Condor has weight wing rubber-power flight control purposes re move weight will needed RC add strength plain foam wing decided use stressed skin method covering ColorTex material has greater tensional strength plastic iron-on films compatible foam since low heat used anyone believes strength desired 1/16 x -in sheet cap spar can inset wings bottom surface removed droop wing tips easier covering tail surfaces require addition rudder elevator control surfaces simply marked outlines foam pencil sliced off sharp knife keep tail easily re Left Experiments showed performance model improved beit drive reduction enabiethe 05 motorto swing larger prop case 1 2g Drill cooling air inlets firewall simple wire skid protects front end Right Included shot authors other Electric models show front King Condor might cleaned up fiberglass cowl spinner June 1986 39 servos mounted common sheet plywood easy removal has sufficIent room aithouth cells receiver battery pack rearranged end-to-end Locate batteries far forward center gravity will correct movable epoxied -in dowel post rudder can rubberbanded place also allowed elevator horn located bottom side will necessary carve clearance fuselage wilt room linkages work elevators two pieces joined -in dowel channel cut stabilizer extension dowel clear ance After elevator hinged channel covered 6 sheet Although coat paint would have done just well probably covered tail surfaces ColorTex easy apply couldnt resist Fuselage could call modifications major fuselage occur first step shorten nose section 10 fuselage molding joint reference using triangle scribe guideline foam square joint line Using light pressure carefully cut off front model hacksaw blade dress surface sanding block battery cells should installed far forward achieve correct center gravity CG shortened noseand locate far away possible receiver Fabricate -in plywood motor MOTOR MOUNT I/B PLY 032 ALUM N2Z~42 SERVO SWITC1-I CAM nflnfl cjw TAP 4-40 mount shown leaving outside edge oversize now save weight steel blind nuts glue small pieces -in ply back motor mount provide thickness screw threads attach motor mount 4-40 machine screws motor attached mount make trial fit front fuselage Remove excess foam nose model until whole assembly can neatly positioned match fuselage contour Mark exact shape fuselage onto mount trim mount size Epoxy-glue mount foam Fabricate two switch plates 6 plywood inset foam flush fit Cut holes through foam backs switch plates wires motor power receiver batteries stuffed nose section through wing opening Remove excess internal foam obtain snug fit elected use standard-size receiver battery re arranged cells end-to-end config uration better suit available space Cut servo mount plate Y16-in plywood attach servos double-sticky servo tape Keep servos low plate clearance will allow Cut two pieces of-in dowel drill through accommodate #2 screw Countersink dowels recess screw head Cut holes through fuselage servo plate mounting bolts go epoxy two dowel pieces positioned flush internal surface servo mounting plate place mark holes glue reinforcing -in ply onto back plate give screw threads something grasp Hook up controls flexible pushrods can easily threaded through rear exit locations Epoxy pushrod outer tubing fuselage exit points wing opening trailing edge receiver simply stuffed fuselage aft servos bit foam should stuffed keep receiver rattling around However almost no vibration electric power usual shock mounting needed Continued page 142 ROflONNIW VN*QOOOL -o ozo 6 fl6PNSSET aifl-7LxIz2zr4T i-V ~1 BA B P 00TAP 4-40 4- * _____________________ PROP UI/S PLY MOTOR QIJY-c9- COOLING AIR PASSAGES COWL IAIR INLET FIBREGLASS COWL 10 1 PROPS ITO I2 DIAM 7T010 PITCH 3/4 SPINNER BELT REDUCTIOJ\ fIii 05 POWER UNIT 075 FERRITEII ASTRO 05 COBALT N BC POWER SWITCH & CHARGER P I L-L REMOVE 40 Model Aviation U Clearance rudder control horn cut out fuselage making neat installa tion Rudder elevators simply sliced off fin stabilizer sharp knife 9 Munson Avenue P C MODEL SUPPLY Bethany CT 06525 203 393-2934 Flight-Proven DesignsSend Brochure Balsa ConstructIon 5-6 lbs Cessna 150 40 Powered 62 Easy Const uction 10-15 brat Stable Fliers Mooney 40 Powered 62Scale Its Appearance Slow Flying Capabilities Cherokee 40 Powered 60 9 ea plus $250 UP5 Contest Proven place 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Great Flyer.5Seml-Kit Anailable.PPO 00 DAVIS DIK 905Span.s25 Ouadra 35 power similar. PD 01933 KINNEFt SPORTSTER U Model K.117 Span.035 power. Pea 4-CYCLE PROJECTS 0 o v AKRON FUNK SI 15 Scale 54 span 80 sizeSl 4 cyCle Fantastic FivePPD ____0 DAVIS DlKhh 603 Spar.D 45 4 cyCle Similar..Pea s15 hoc Inch wale Sixth scale3l _____________0 1933 KINNER SPORTSTER5 ID Model K.7a Span. 51-754 cy Pea ap PhotO reduced 14 Scale plans o TWO Inch scate Seth scale 0________0 Mere 004 plane0 coming PHOTO DOCUMENTATION PACKS availableon Scale Plans SI ALL PLANS ROLLED SHIPPED UPS O Complete wlnstrOcf ion SookICt Send siDO Catalog O Nem York State Residents add 7% sales tax. Send check 5 O MO COOS. Allow 3meeke chesktocleer U length engine run given amount fuel laminations made Elmers woodworking glue After carving sanding prop rubbed-on coat clear dope used seal After rubbing down steel wool finished clear polyurethane spray can final balance sprayed little finish onto lighter blade beginner get experienced RC flier test-fly model First check flight pack battery sufficient charge see controls work freely respond correctly radio signals Fill tank Cox fuel fire up engine bring peak rpm richen needle valve just trifle Hand-launch model gently shoulder height level attitude directly wind running few steps Later after needed trimming has done can launch flat-footed Im mediately make necessary transmitter trim adjustments two models flew virtually no trimming needed model flies smoothly climbs well responsive control movements loops easily will spin stalled given full-left full-up control Recovery immediate controls neutralized proper trim transmitter Henry T flies hands-off Takeoffs landings particularly enjoyable because model tracks straight little tendency veer ground loop fly buoyant air prepared long glide extended soaring try fly model misaligned warped surface balance point CG rearward spar location cautious use down-flap settingsuse sparingly Several friends have discussed building enlarged versions model usually 6-ft-span size 15 engine writing own preference something larger would near-6-ft-span version altered airfoil having shallow convex lower surface operable flaps ailerons 40-size four-stroke engine Henry T has given lots pleas ure hours relaxed air time abso lutely minimum cost decide build good luck pleasant flying Radio Technique/Myers Continued page 37 Carl Goldberg Bob Novak Descriptions honorees accomplishments presented article November 1985 issue Flying Models page 32 et seq award memorializes Howard McEntee great early creators RC hobby Beginning articles single-channel RC 27255 MHz published Air Trails early 1950s continuing column American Air craft Modeller till time death summer 1972 Howard McEntee patiently educated whole generation modelers including Howard became famous publishing designs transmitters receivers actuators etc worked Radio Tech nique modeled anything modeled Howards writings award given have made significant contribution RC hobby Looking names above wonder what have contributed deserve honor best can figure 10 years have covered lot subjects have thank letters experts novators have shared knowledge could give accurate timely informa tion Carl Wheeley Bill Winter Ross McMullen giving wide latitude pick ing subjects column Bob Aberle ing friend critic needed John Worth advice Good Lord putting position write could use particular education experiences advantage examining understanding RC problems write about humbly thank Bob Foshay Mrs Clark WRAMs honor George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Electric Condor/deBolt Continued page 40 motor on-off microswitch oper ated simple cam arrangement offers large dead band eliminating need precise finicky adjustments original cam made sheet alumi num 1/5$ ply would work well cam servo locate switch plywood correct operation oc 142 Model Aviation HARRYS WHEEL COLLAR WRENCH hardened steel FOR 15 AXLES 5/32 AXLES LARGER AXlES S279 EACH HARRY B HIGLEY 8 SONS INC p o Box 532 GLENWOOD ILL 60425 U miJu ml i ICI Breed SechslDeImarLIghtest weight read y-te-m@unt enginesi TG Mfg 857 HIgh Mountain Rd North Haledon NJ 07508 427-3845 curs Locate switch mounting screw holes mount switch Cut off original landing bump bottom fuselage will result hole will serve exit cooling air Cut second hole aft provide additional heat exit Put underlayer glass cloth resin over motor mount plywood additional strength cover entire fuselage layer 1 Yz-oz cloth resin cowl essential keeping simple-to-build philosophy original model flown extensively out Making cowl fairly simple however improves appearance great ly steps follows Fabricate h-in balsa cowl former key around belt drive base motor mount 4a plywood spinner backplate tightly fitted onto outside propeller drive washer space around motor pulleys between backplate cowl former filled gobs Styrofoam Carve sand foam desired cowl shape cover three layers glass cloth/resin completed remove fuselage dig out Styro foam provide needed clearance cowl keyed place former attached two screws Flying balance point CG 4 aft wing leading edge overly critical design followed procedures actual location should come out very close trim adjusting done stabil izer design uses lifting tail positive incidence can added stabilizer trimming purposes no problems resulting No 1 consideration Electrics dont have excessive power typical glow engines Think before act dont put model situation would require abnormal power recovery you will get along fine adequate power avail able launching procedure switch motor run couple steps push model directly forward level atti tude should stay launch altitude few feet begin gentle climb like can let model stay pointed wind find its best angle climb elevator model should reach soaring altitude short period Otherwise can hold level flight circle field hearts desire King Condor no slow poke big trainer decent maneuvers stall turns inside loops should forget precision flight figure eights procedure turns etc hours flying experimenting different motor configurations have taught us couple things First electric power can applied two ways directly through belt drive direct drive did impress us way little 7-in prop can pull large model performance considerably less system using belt reduction drive larger prop As would expected 1 l-in-dia prop better matched models size produces noticeable improvement performance Secondly 54-oz model considered lead sled far specialized Electric designs go after experimenting prop modifica tions dramatic increase thrust point model suitable electric-powered duration flyingto least just below competition level experience would certainly suggest King Condor Electric trainer get indoctrination fascinating kind flight original RB-i King Condor kit available local hobby dealer may ordered Goliath Whirlwind Aircraft Inc PO Box 589 Lathrup Village MI 48076 $3995 including ship ping handling MI residents add sales tax Master Visa cards accepted responding advertisers mention read about Model Aviation .A BLAST FROM THE PAST JIM WALKERS CLASSIC GLIDERS 743Pak$495 404 INTERCEPTOR Folding Wing Glider U-Build-It Kit$395 Ready Fly5795 Add 53 postage handling first 2 packages 10% additional PO 8ox68132 AIRCRAFT CO Portland OR 97268 June 1986 143 31 -$27500 34- $34500 37- $35500 42 -$37500 Roush Laser Kltted TG Engines Complete RegS24995 wjlasrdmrekk-S275S5 NothingExtretoBuy L4ShS22 SUP 87SIbS4Z4tIIP 4J-Sa Option engines Throttle-coupled spark advance Features Custemized newest German engines net parts Mufflere Mount ting Bolte Presaure Tap far Smek Cubeseter Usilme Inldesi CH Eleotronlcs Ignition Peck ty SwItch ft l4ub stor Spk Pigs Warranty Panity Puts WedusensNp RAINBOW RUNNER 25 or 45 Gfl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 HODDY HAMMER INCLUDES5 Steel Brass n Tip specify extra tip ordering Send Check Money Order MEtWMODELS P0 Box 6627 Huntington Beach CA 92615 714 9621703 Add 150 Post & HandCA Res add 6% tan