UP Great White North Canadians own Combat team trials past July se lect team compete CL World Champi onships held France summer Pat MacKinzie Ron Malcolm Dave Lovgren will 1990 Canadian team Ross Melhuish alternate member failing make top spots first time since Combat came official FAI World Championship event Paul Smith reported both Malcolm Lovgren used Nelson-powered all-foam Mon archs Steve Kott did pitting Pat MacKinzie also used Nelson power Russian-style models constructed balsa/hard wood/foam composite materials Melhuish used familiar 1980-Doroschenko-style models Pauls report mentioned streamer-hook weakness effectively cured Winners Combat regular Canadian Na tionals included Pat MacKinzie taking Slow Com bat Wally Kruger Fast Combat Paul Smith FAI Mike Palermo /2A events run double-elimination except FAI single-elimination used traditional two-airplane format Team trials winner Pat MacKinzie taken out first round FAI Steve Kott Frank Boden member Dreaded Cana dian Contingent sent report Bladder Grabbers 89 version meet took place just couple weeks before US AMA Nats $10000 prizes seemed attract top fliers took about 200 matches decide winner triple-elimination contest First place taken John Salvin IV younger two Salvins currently com pete Second Steve Stewart best showing career Previous Bladder Grabber Money Meet winner Michael Willcox third followed Mike Petri always around top spots runner-up previ ous year Bob Carver thc mccts sponsor placed fifth Bob has flying exceptionally well has models very similar used Nats-winner Norm McFadden Ofttimes Bladder Grabber meet new designs introduced except reengineered models using carbon-fiber aluminum boomsand copies Steve Hills Arrowplanethere wasnt anything revolution ary time Boden mentioned problems burst bladders because high temperatures meet first practice day US FAt team tri als found us major needle-setting problems engines can simulate local field turning needle about halfturn should New bladders glow plugs head shims tried nothing seemed work until changed different Continued page 172 January 1990 63 Control Line Combat Charlie Johnson 3716 Ingraham St San Diego CA 2IO9 Fast Combat winners 1989 Bladder Grabber meet Snohomish WA L-R Bob Carver 5thmeet sponsor John Salvin IV winner Steve Stewart 2nd Michael WilIcox 3rd Mike Petrl 4th Contest famed its $10000 prizes Frank Von Boden took photo Charlie lost notes lA Combat model Would owner please send note full credit can given Note TD power pacifier fuel tank external controls lots light ening holes foam wing cores film-covered stab lots dead weight cut out Canadas national Combat team will head CL World Champs Top-to-Bottom Pat MacKlnzie 1st Ron Malcolm 2nd Dave Lovgren 3rd Paul Smith photo Fast uomoat winners tne July 195w uni cago meet L-R Bob Oge 3rd Dave Fisch er 2nd Steve Wilk 1st Tom Zon plc THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Junior Senior champs need compete headto-head against Open champion would no longer exist possibility quite controversial fliers feel such format would effectively ex clude Juniors Seniors future par ticipation Walker Cup flyoff may prove case evi dence past argues against Names like Werwage Cipra Adamisin proof posi tive excellence rises top regardless age Besides flip side coin un der skill class format entirely possible five top Expert class fliers could Jun iors Seniors would us old duffers standing sidelines CL Racing/Ballard Continued page 62 Pitmans finger protection have asked several occasions recommend best type glove pitman use Over years have found all-leather glove absolutely best gloves use fiber body leather trim just too stiff good flexible fin ger movement Remember pitmans right hand generally used adjust needle valve open fuel shutoffs require good smooth finger movement flip propwhich man dates protection kickback Racing engine addition people like glove can cinched up wrist photos shows well-used leather glove discarded after Racing campaigns As can see flip-finger has fi nally become cut mangled no longer fers protection pitmans digit cinching glove up near wrist glove held sta tionary hand reduces slippage grabbing aircraft landing glove actu ally acts damping unit pitman catches airplane either prop nut wing leather glove much slipresistant grabbing Racer covered oil during fast pit stop pitmen prefer gloves have no lining flexible yet have dense leather through out fingers palm Half-A Mouse Racing spent portion spring summer working Cox 049 en gines After receiving several tips fellow Mouse Racing enthusiasts found great deal problem involved varnish building up piston bore liner 1988 1 50 seconds shy qualifying final race whereas 1989 finished fi nals Open Mouse four seconds off winners time used exactly same airplanes engines except year started using 0000 steel wool wooden dowel rod re move varnish cylinder 25-30 runs past would experience acceptable per formance several minutes find engine performance would deteriorate run ning slowly poor starting charac teristics would almost impossible find proper needle valve setting found cleaning varnish cylinder restored origi nal performance movement needle valve nearly critical able work propeller combinations improve airspeed certainly cannot emphasize enough varnish-bedeviled cylinder must cleaned regular basis consistent performance ob tamed little engines As always solicit photos comments CL Combat/Johnson Continued page 63 fuel fuel wed using brand-new gallon produced well-known commercial maker After switch everything back normal manufacturer heard about misfortunes got contact sent case sorted fuels having various nitro contents us test never able duplicate prob lems previously encountered fuel ran perfectly have developed some new theories probable causes troubles Most com mercial fuels contain additive packages pre vent foaming hard tanks tanks detergents keep engine clean something keep residue rusting innards en gine well things improve film strength lubricant etc additives may wonders power cleanliness longevity thought maybe attacked bladder material residue attack clogging needle valves thereby making overly lean settings Because high pressure produced bladders have run needle valves al closed off get right mixture typical Supertigre needle 35 might set -3A turn out fully seated position suctionfed engine same type might require nee dle set three four full turns out What means needle valve assemblies eatI U I11 reds cowls kits plans Strong lightweight one-piece constwction Exact duplicates manufacturers original Also radial cowls wheelpants SendSl lJOfora-pg brochure Orcall 703-890-60179 am-9 pm EDT phone orders information FIBERGLASS MDePtMARIlBOXS3O Goodview VA 24095 172 Model Aviation hL W202 1/4 SCALE GLIDER KIT Premium Quality Kit European Quality American Technology Piece Gel-coated Fuselage Pre-Manufactured Wings w/Carbon Fiber Spars Obechi sheeting • Slope Thermal 000 plus $25 Shipping 1/4 & 1/5 Scale Glider Retracts Precision Machined Aerospace Specs Made 6061 T6 Aluminum 650 plus $5 Shipping & Handling 5 Feat Long 1/16 Misic Wire Pushrods Nylon Outer Casing 63 ma plus $3 Shipping SCALE GLIDER COMPONENTS 7024 Fm PH. CarImbid 0* 92009 6193 921-1439 CA Residents add 7% Send stamped ennelope info ily clogged foreign material using pressure-bladder tanks engines acted like something needle nothing ever found remember problems xylene fuel used clubs one-fluid-ounce Racing event melted some plastics did something castor oil made turn stringy always hear about alcohol tries reach out grab moisture right Out air its really too busy trying evaporate What can happen warm moist air fuel container may condense walls container store garage after flying session moisture runs down inner walls container fuel suggestion fuel manufacturer top off fuel can get home using fuel container has remained ga rage worrying about moisture get ting fuel alcohol nitro busy getting out fuel evaporation As al cohol nitro evaporated percentage oil increased leave lid off fuel bottle hot day get lots dirt weeds fuel some high-oil-content fuel runs hot makes less power before prone flameouts Only much oil engine needs proper lubrication should fuel wont find people can will give swer question much oil enough testing one-ounce Racing event tried oil contents around 30% found though quantity fuel pass ing through engine about half normal give lot laps percentage oil 20% lower Most commercial fuels around figure because safe theyre go ing risk problems just get last rpm En gines really like run fuel 16% oil content Dan Rutherford telling group runs 7% Delta oil 5% castor commer cial guys have secret oils additives good old castor oil Ucon 625 has used great success range 16%-20% years Union Carbide makes LB625 should able get good chemical supply house Also buy best grade alcohol 98%-pure nitro can find can buy ingredients good big boys use take greater pains keeping quality up during manufacture thats Ive found easier cheaper just buy fuel works well engines Save exotic fuel special occasions youre testing dont need reliability Have heard about full-complement bear ings 35s really tear up rear bearings revs load get too high Usually retainer comes apart takes out new liner pis ton some nice expensive bearings feature phenolic cages solve problem Theres another way preferred can practice old blown-up bearings Pull out whats left retainer measure diameter balls dont have caliper micrometer just take ball down local bearing house can buy small box balls comparative size very little money now go home fill old bearing ca pacity new ballsbut theres still step left accomplish before doing Take Dremel Moto Tool grind relief Oily 7ay Fly Galaxy 8 Computer JR Galaxy 8 PCM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiCds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differential aileron v-tail mix elevator-flap mix 4 free mix programs , Available your___ local hobby dealer LJUI7tH11ICS Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 January 1990 173 Ualaxy experience Great Performance Quartet $23995 DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins ZTRA 230 SPAN 76 WING AREA 900 sq ins $23995 ZLIN 526 SPAN 72 insWING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors Happy Holidays available direct select hobby shops c ZIMPRO MARKETINO I- inner outer races allow insert last ball two 1 did bearing still piece old retainer place Wash bits grindings Out bearing really well discard old balls since have whole box full new ones use up Youll able insert new balls new indentations races line up course balls can fall back out align ment occurs like engine running reinstall bearing engine put ground-out side next crankcase Like ideas youll find some guys swear ing technique others swearing ot might slight power penalty because extra friction its lot cheaper us ing high-tech bearingsand have known come apart reconditioned ones wont Dan Rutherfords group has using allstock-part Fox Mk Vis doesnt mean engines really stock like right-out-of-thebox just no after-market parts used Dan said lot trouble exces sive expansion piston think causes lot broken rod problems other engines Contrary common practice just lap piston take down high spots material will polished off piston off hard chrome cylinder fit rod both wrist pin crankpin important because galls either places itll probably break rod wrist pin especially critical Mark VIs cause held place piston roll pin can rotate piston Duke Fox can give timing specifications will greatly improve engine Crank timing seems make lot difference intake port timing Exhaust timing limited prop want pull Unfortunately experience gained going too farbut thats fast guys found out make engines run Has anyone worked OS 32 youve good suc cess let rest us know about modifica tions Mall Show/Weinreich Continued page 65 SAM Seattle Sky Raiders Control Line club asked unable tend Putting mall show relatively new experience clubs Though previous show taken place several years ago Mr Benjamin said learned lot organizing show offered follow ing suggestions club contemplating putting show its own Have enough tables Almost club brought models could fit four tables allotted Have railings out away table models cant handled Skirts railings helpful keep toddlers walking under Check mall security few years ago show tried another mall Puget Sound area modelers hard time protecting planes Fortunately case Capital Mall club wants sell models like AMA Delta Dart clear first mall officials Flying Indoor models great attention getter Ms Brown also some advice club approaches marketing direc tor about staging mall show Put proposal writing telling director what show will about what equipment will needed clubs will involved etc said everyones standards show CAPACITIVEDISCHARGE IGNITION SYSTEM fssturint EIETRO1{1CALLY CONTECLIED ADvANCE Basic unit LECTRONIC CIRCUITRY REPLACES ARY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAP! Par complete inSormation send selladdressed stamped 174 Model Aviation NORTH AMERICAN YAT-28-E SCA E 66 SPAN 60 LENGTH 8 ESENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware Factory Approved 3 Views Ply Capped Cowl Wing J Saddle & Surfaces JigBuiltFlyingSurfaces* Scale Spinner & Prop BladesC$15995 ping &4. order call write 7t GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 CHIPMUNK 850$23995 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-482-6188
Edition: Model Aviation - 1990/01
Page Numbers: 63, 172, 173, 174
UP Great White North Canadians own Combat team trials past July se lect team compete CL World Champi onships held France summer Pat MacKinzie Ron Malcolm Dave Lovgren will 1990 Canadian team Ross Melhuish alternate member failing make top spots first time since Combat came official FAI World Championship event Paul Smith reported both Malcolm Lovgren used Nelson-powered all-foam Mon archs Steve Kott did pitting Pat MacKinzie also used Nelson power Russian-style models constructed balsa/hard wood/foam composite materials Melhuish used familiar 1980-Doroschenko-style models Pauls report mentioned streamer-hook weakness effectively cured Winners Combat regular Canadian Na tionals included Pat MacKinzie taking Slow Com bat Wally Kruger Fast Combat Paul Smith FAI Mike Palermo /2A events run double-elimination except FAI single-elimination used traditional two-airplane format Team trials winner Pat MacKinzie taken out first round FAI Steve Kott Frank Boden member Dreaded Cana dian Contingent sent report Bladder Grabbers 89 version meet took place just couple weeks before US AMA Nats $10000 prizes seemed attract top fliers took about 200 matches decide winner triple-elimination contest First place taken John Salvin IV younger two Salvins currently com pete Second Steve Stewart best showing career Previous Bladder Grabber Money Meet winner Michael Willcox third followed Mike Petri always around top spots runner-up previ ous year Bob Carver thc mccts sponsor placed fifth Bob has flying exceptionally well has models very similar used Nats-winner Norm McFadden Ofttimes Bladder Grabber meet new designs introduced except reengineered models using carbon-fiber aluminum boomsand copies Steve Hills Arrowplanethere wasnt anything revolution ary time Boden mentioned problems burst bladders because high temperatures meet first practice day US FAt team tri als found us major needle-setting problems engines can simulate local field turning needle about halfturn should New bladders glow plugs head shims tried nothing seemed work until changed different Continued page 172 January 1990 63 Control Line Combat Charlie Johnson 3716 Ingraham St San Diego CA 2IO9 Fast Combat winners 1989 Bladder Grabber meet Snohomish WA L-R Bob Carver 5thmeet sponsor John Salvin IV winner Steve Stewart 2nd Michael WilIcox 3rd Mike Petrl 4th Contest famed its $10000 prizes Frank Von Boden took photo Charlie lost notes lA Combat model Would owner please send note full credit can given Note TD power pacifier fuel tank external controls lots light ening holes foam wing cores film-covered stab lots dead weight cut out Canadas national Combat team will head CL World Champs Top-to-Bottom Pat MacKlnzie 1st Ron Malcolm 2nd Dave Lovgren 3rd Paul Smith photo Fast uomoat winners tne July 195w uni cago meet L-R Bob Oge 3rd Dave Fisch er 2nd Steve Wilk 1st Tom Zon plc THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Junior Senior champs need compete headto-head against Open champion would no longer exist possibility quite controversial fliers feel such format would effectively ex clude Juniors Seniors future par ticipation Walker Cup flyoff may prove case evi dence past argues against Names like Werwage Cipra Adamisin proof posi tive excellence rises top regardless age Besides flip side coin un der skill class format entirely possible five top Expert class fliers could Jun iors Seniors would us old duffers standing sidelines CL Racing/Ballard Continued page 62 Pitmans finger protection have asked several occasions recommend best type glove pitman use Over years have found all-leather glove absolutely best gloves use fiber body leather trim just too stiff good flexible fin ger movement Remember pitmans right hand generally used adjust needle valve open fuel shutoffs require good smooth finger movement flip propwhich man dates protection kickback Racing engine addition people like glove can cinched up wrist photos shows well-used leather glove discarded after Racing campaigns As can see flip-finger has fi nally become cut mangled no longer fers protection pitmans digit cinching glove up near wrist glove held sta tionary hand reduces slippage grabbing aircraft landing glove actu ally acts damping unit pitman catches airplane either prop nut wing leather glove much slipresistant grabbing Racer covered oil during fast pit stop pitmen prefer gloves have no lining flexible yet have dense leather through out fingers palm Half-A Mouse Racing spent portion spring summer working Cox 049 en gines After receiving several tips fellow Mouse Racing enthusiasts found great deal problem involved varnish building up piston bore liner 1988 1 50 seconds shy qualifying final race whereas 1989 finished fi nals Open Mouse four seconds off winners time used exactly same airplanes engines except year started using 0000 steel wool wooden dowel rod re move varnish cylinder 25-30 runs past would experience acceptable per formance several minutes find engine performance would deteriorate run ning slowly poor starting charac teristics would almost impossible find proper needle valve setting found cleaning varnish cylinder restored origi nal performance movement needle valve nearly critical able work propeller combinations improve airspeed certainly cannot emphasize enough varnish-bedeviled cylinder must cleaned regular basis consistent performance ob tamed little engines As always solicit photos comments CL Combat/Johnson Continued page 63 fuel fuel wed using brand-new gallon produced well-known commercial maker After switch everything back normal manufacturer heard about misfortunes got contact sent case sorted fuels having various nitro contents us test never able duplicate prob lems previously encountered fuel ran perfectly have developed some new theories probable causes troubles Most com mercial fuels contain additive packages pre vent foaming hard tanks tanks detergents keep engine clean something keep residue rusting innards en gine well things improve film strength lubricant etc additives may wonders power cleanliness longevity thought maybe attacked bladder material residue attack clogging needle valves thereby making overly lean settings Because high pressure produced bladders have run needle valves al closed off get right mixture typical Supertigre needle 35 might set -3A turn out fully seated position suctionfed engine same type might require nee dle set three four full turns out What means needle valve assemblies eatI U I11 reds cowls kits plans Strong lightweight one-piece constwction Exact duplicates manufacturers original Also radial cowls wheelpants SendSl lJOfora-pg brochure Orcall 703-890-60179 am-9 pm EDT phone orders information FIBERGLASS MDePtMARIlBOXS3O Goodview VA 24095 172 Model Aviation hL W202 1/4 SCALE GLIDER KIT Premium Quality Kit European Quality American Technology Piece Gel-coated Fuselage Pre-Manufactured Wings w/Carbon Fiber Spars Obechi sheeting • Slope Thermal 000 plus $25 Shipping 1/4 & 1/5 Scale Glider Retracts Precision Machined Aerospace Specs Made 6061 T6 Aluminum 650 plus $5 Shipping & Handling 5 Feat Long 1/16 Misic Wire Pushrods Nylon Outer Casing 63 ma plus $3 Shipping SCALE GLIDER COMPONENTS 7024 Fm PH. CarImbid 0* 92009 6193 921-1439 CA Residents add 7% Send stamped ennelope info ily clogged foreign material using pressure-bladder tanks engines acted like something needle nothing ever found remember problems xylene fuel used clubs one-fluid-ounce Racing event melted some plastics did something castor oil made turn stringy always hear about alcohol tries reach out grab moisture right Out air its really too busy trying evaporate What can happen warm moist air fuel container may condense walls container store garage after flying session moisture runs down inner walls container fuel suggestion fuel manufacturer top off fuel can get home using fuel container has remained ga rage worrying about moisture get ting fuel alcohol nitro busy getting out fuel evaporation As al cohol nitro evaporated percentage oil increased leave lid off fuel bottle hot day get lots dirt weeds fuel some high-oil-content fuel runs hot makes less power before prone flameouts Only much oil engine needs proper lubrication should fuel wont find people can will give swer question much oil enough testing one-ounce Racing event tried oil contents around 30% found though quantity fuel pass ing through engine about half normal give lot laps percentage oil 20% lower Most commercial fuels around figure because safe theyre go ing risk problems just get last rpm En gines really like run fuel 16% oil content Dan Rutherford telling group runs 7% Delta oil 5% castor commer cial guys have secret oils additives good old castor oil Ucon 625 has used great success range 16%-20% years Union Carbide makes LB625 should able get good chemical supply house Also buy best grade alcohol 98%-pure nitro can find can buy ingredients good big boys use take greater pains keeping quality up during manufacture thats Ive found easier cheaper just buy fuel works well engines Save exotic fuel special occasions youre testing dont need reliability Have heard about full-complement bear ings 35s really tear up rear bearings revs load get too high Usually retainer comes apart takes out new liner pis ton some nice expensive bearings feature phenolic cages solve problem Theres another way preferred can practice old blown-up bearings Pull out whats left retainer measure diameter balls dont have caliper micrometer just take ball down local bearing house can buy small box balls comparative size very little money now go home fill old bearing ca pacity new ballsbut theres still step left accomplish before doing Take Dremel Moto Tool grind relief Oily 7ay Fly Galaxy 8 Computer JR Galaxy 8 PCM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiCds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differential aileron v-tail mix elevator-flap mix 4 free mix programs , Available your___ local hobby dealer LJUI7tH11ICS Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 January 1990 173 Ualaxy experience Great Performance Quartet $23995 DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins ZTRA 230 SPAN 76 WING AREA 900 sq ins $23995 ZLIN 526 SPAN 72 insWING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors Happy Holidays available direct select hobby shops c ZIMPRO MARKETINO I- inner outer races allow insert last ball two 1 did bearing still piece old retainer place Wash bits grindings Out bearing really well discard old balls since have whole box full new ones use up Youll able insert new balls new indentations races line up course balls can fall back out align ment occurs like engine running reinstall bearing engine put ground-out side next crankcase Like ideas youll find some guys swear ing technique others swearing ot might slight power penalty because extra friction its lot cheaper us ing high-tech bearingsand have known come apart reconditioned ones wont Dan Rutherfords group has using allstock-part Fox Mk Vis doesnt mean engines really stock like right-out-of-thebox just no after-market parts used Dan said lot trouble exces sive expansion piston think causes lot broken rod problems other engines Contrary common practice just lap piston take down high spots material will polished off piston off hard chrome cylinder fit rod both wrist pin crankpin important because galls either places itll probably break rod wrist pin especially critical Mark VIs cause held place piston roll pin can rotate piston Duke Fox can give timing specifications will greatly improve engine Crank timing seems make lot difference intake port timing Exhaust timing limited prop want pull Unfortunately experience gained going too farbut thats fast guys found out make engines run Has anyone worked OS 32 youve good suc cess let rest us know about modifica tions Mall Show/Weinreich Continued page 65 SAM Seattle Sky Raiders Control Line club asked unable tend Putting mall show relatively new experience clubs Though previous show taken place several years ago Mr Benjamin said learned lot organizing show offered follow ing suggestions club contemplating putting show its own Have enough tables Almost club brought models could fit four tables allotted Have railings out away table models cant handled Skirts railings helpful keep toddlers walking under Check mall security few years ago show tried another mall Puget Sound area modelers hard time protecting planes Fortunately case Capital Mall club wants sell models like AMA Delta Dart clear first mall officials Flying Indoor models great attention getter Ms Brown also some advice club approaches marketing direc tor about staging mall show Put proposal writing telling director what show will about what equipment will needed clubs will involved etc said everyones standards show CAPACITIVEDISCHARGE IGNITION SYSTEM fssturint EIETRO1{1CALLY CONTECLIED ADvANCE Basic unit LECTRONIC CIRCUITRY REPLACES ARY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAP! Par complete inSormation send selladdressed stamped 174 Model Aviation NORTH AMERICAN YAT-28-E SCA E 66 SPAN 60 LENGTH 8 ESENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware Factory Approved 3 Views Ply Capped Cowl Wing J Saddle & Surfaces JigBuiltFlyingSurfaces* Scale Spinner & Prop BladesC$15995 ping &4. order call write 7t GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 CHIPMUNK 850$23995 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-482-6188
Edition: Model Aviation - 1990/01
Page Numbers: 63, 172, 173, 174
UP Great White North Canadians own Combat team trials past July se lect team compete CL World Champi onships held France summer Pat MacKinzie Ron Malcolm Dave Lovgren will 1990 Canadian team Ross Melhuish alternate member failing make top spots first time since Combat came official FAI World Championship event Paul Smith reported both Malcolm Lovgren used Nelson-powered all-foam Mon archs Steve Kott did pitting Pat MacKinzie also used Nelson power Russian-style models constructed balsa/hard wood/foam composite materials Melhuish used familiar 1980-Doroschenko-style models Pauls report mentioned streamer-hook weakness effectively cured Winners Combat regular Canadian Na tionals included Pat MacKinzie taking Slow Com bat Wally Kruger Fast Combat Paul Smith FAI Mike Palermo /2A events run double-elimination except FAI single-elimination used traditional two-airplane format Team trials winner Pat MacKinzie taken out first round FAI Steve Kott Frank Boden member Dreaded Cana dian Contingent sent report Bladder Grabbers 89 version meet took place just couple weeks before US AMA Nats $10000 prizes seemed attract top fliers took about 200 matches decide winner triple-elimination contest First place taken John Salvin IV younger two Salvins currently com pete Second Steve Stewart best showing career Previous Bladder Grabber Money Meet winner Michael Willcox third followed Mike Petri always around top spots runner-up previ ous year Bob Carver thc mccts sponsor placed fifth Bob has flying exceptionally well has models very similar used Nats-winner Norm McFadden Ofttimes Bladder Grabber meet new designs introduced except reengineered models using carbon-fiber aluminum boomsand copies Steve Hills Arrowplanethere wasnt anything revolution ary time Boden mentioned problems burst bladders because high temperatures meet first practice day US FAt team tri als found us major needle-setting problems engines can simulate local field turning needle about halfturn should New bladders glow plugs head shims tried nothing seemed work until changed different Continued page 172 January 1990 63 Control Line Combat Charlie Johnson 3716 Ingraham St San Diego CA 2IO9 Fast Combat winners 1989 Bladder Grabber meet Snohomish WA L-R Bob Carver 5thmeet sponsor John Salvin IV winner Steve Stewart 2nd Michael WilIcox 3rd Mike Petrl 4th Contest famed its $10000 prizes Frank Von Boden took photo Charlie lost notes lA Combat model Would owner please send note full credit can given Note TD power pacifier fuel tank external controls lots light ening holes foam wing cores film-covered stab lots dead weight cut out Canadas national Combat team will head CL World Champs Top-to-Bottom Pat MacKlnzie 1st Ron Malcolm 2nd Dave Lovgren 3rd Paul Smith photo Fast uomoat winners tne July 195w uni cago meet L-R Bob Oge 3rd Dave Fisch er 2nd Steve Wilk 1st Tom Zon plc THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Junior Senior champs need compete headto-head against Open champion would no longer exist possibility quite controversial fliers feel such format would effectively ex clude Juniors Seniors future par ticipation Walker Cup flyoff may prove case evi dence past argues against Names like Werwage Cipra Adamisin proof posi tive excellence rises top regardless age Besides flip side coin un der skill class format entirely possible five top Expert class fliers could Jun iors Seniors would us old duffers standing sidelines CL Racing/Ballard Continued page 62 Pitmans finger protection have asked several occasions recommend best type glove pitman use Over years have found all-leather glove absolutely best gloves use fiber body leather trim just too stiff good flexible fin ger movement Remember pitmans right hand generally used adjust needle valve open fuel shutoffs require good smooth finger movement flip propwhich man dates protection kickback Racing engine addition people like glove can cinched up wrist photos shows well-used leather glove discarded after Racing campaigns As can see flip-finger has fi nally become cut mangled no longer fers protection pitmans digit cinching glove up near wrist glove held sta tionary hand reduces slippage grabbing aircraft landing glove actu ally acts damping unit pitman catches airplane either prop nut wing leather glove much slipresistant grabbing Racer covered oil during fast pit stop pitmen prefer gloves have no lining flexible yet have dense leather through out fingers palm Half-A Mouse Racing spent portion spring summer working Cox 049 en gines After receiving several tips fellow Mouse Racing enthusiasts found great deal problem involved varnish building up piston bore liner 1988 1 50 seconds shy qualifying final race whereas 1989 finished fi nals Open Mouse four seconds off winners time used exactly same airplanes engines except year started using 0000 steel wool wooden dowel rod re move varnish cylinder 25-30 runs past would experience acceptable per formance several minutes find engine performance would deteriorate run ning slowly poor starting charac teristics would almost impossible find proper needle valve setting found cleaning varnish cylinder restored origi nal performance movement needle valve nearly critical able work propeller combinations improve airspeed certainly cannot emphasize enough varnish-bedeviled cylinder must cleaned regular basis consistent performance ob tamed little engines As always solicit photos comments CL Combat/Johnson Continued page 63 fuel fuel wed using brand-new gallon produced well-known commercial maker After switch everything back normal manufacturer heard about misfortunes got contact sent case sorted fuels having various nitro contents us test never able duplicate prob lems previously encountered fuel ran perfectly have developed some new theories probable causes troubles Most com mercial fuels contain additive packages pre vent foaming hard tanks tanks detergents keep engine clean something keep residue rusting innards en gine well things improve film strength lubricant etc additives may wonders power cleanliness longevity thought maybe attacked bladder material residue attack clogging needle valves thereby making overly lean settings Because high pressure produced bladders have run needle valves al closed off get right mixture typical Supertigre needle 35 might set -3A turn out fully seated position suctionfed engine same type might require nee dle set three four full turns out What means needle valve assemblies eatI U I11 reds cowls kits plans Strong lightweight one-piece constwction Exact duplicates manufacturers original Also radial cowls wheelpants SendSl lJOfora-pg brochure Orcall 703-890-60179 am-9 pm EDT phone orders information FIBERGLASS MDePtMARIlBOXS3O Goodview VA 24095 172 Model Aviation hL W202 1/4 SCALE GLIDER KIT Premium Quality Kit European Quality American Technology Piece Gel-coated Fuselage Pre-Manufactured Wings w/Carbon Fiber Spars Obechi sheeting • Slope Thermal 000 plus $25 Shipping 1/4 & 1/5 Scale Glider Retracts Precision Machined Aerospace Specs Made 6061 T6 Aluminum 650 plus $5 Shipping & Handling 5 Feat Long 1/16 Misic Wire Pushrods Nylon Outer Casing 63 ma plus $3 Shipping SCALE GLIDER COMPONENTS 7024 Fm PH. CarImbid 0* 92009 6193 921-1439 CA Residents add 7% Send stamped ennelope info ily clogged foreign material using pressure-bladder tanks engines acted like something needle nothing ever found remember problems xylene fuel used clubs one-fluid-ounce Racing event melted some plastics did something castor oil made turn stringy always hear about alcohol tries reach out grab moisture right Out air its really too busy trying evaporate What can happen warm moist air fuel container may condense walls container store garage after flying session moisture runs down inner walls container fuel suggestion fuel manufacturer top off fuel can get home using fuel container has remained ga rage worrying about moisture get ting fuel alcohol nitro busy getting out fuel evaporation As al cohol nitro evaporated percentage oil increased leave lid off fuel bottle hot day get lots dirt weeds fuel some high-oil-content fuel runs hot makes less power before prone flameouts Only much oil engine needs proper lubrication should fuel wont find people can will give swer question much oil enough testing one-ounce Racing event tried oil contents around 30% found though quantity fuel pass ing through engine about half normal give lot laps percentage oil 20% lower Most commercial fuels around figure because safe theyre go ing risk problems just get last rpm En gines really like run fuel 16% oil content Dan Rutherford telling group runs 7% Delta oil 5% castor commer cial guys have secret oils additives good old castor oil Ucon 625 has used great success range 16%-20% years Union Carbide makes LB625 should able get good chemical supply house Also buy best grade alcohol 98%-pure nitro can find can buy ingredients good big boys use take greater pains keeping quality up during manufacture thats Ive found easier cheaper just buy fuel works well engines Save exotic fuel special occasions youre testing dont need reliability Have heard about full-complement bear ings 35s really tear up rear bearings revs load get too high Usually retainer comes apart takes out new liner pis ton some nice expensive bearings feature phenolic cages solve problem Theres another way preferred can practice old blown-up bearings Pull out whats left retainer measure diameter balls dont have caliper micrometer just take ball down local bearing house can buy small box balls comparative size very little money now go home fill old bearing ca pacity new ballsbut theres still step left accomplish before doing Take Dremel Moto Tool grind relief Oily 7ay Fly Galaxy 8 Computer JR Galaxy 8 PCM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiCds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differential aileron v-tail mix elevator-flap mix 4 free mix programs , Available your___ local hobby dealer LJUI7tH11ICS Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 January 1990 173 Ualaxy experience Great Performance Quartet $23995 DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins ZTRA 230 SPAN 76 WING AREA 900 sq ins $23995 ZLIN 526 SPAN 72 insWING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors Happy Holidays available direct select hobby shops c ZIMPRO MARKETINO I- inner outer races allow insert last ball two 1 did bearing still piece old retainer place Wash bits grindings Out bearing really well discard old balls since have whole box full new ones use up Youll able insert new balls new indentations races line up course balls can fall back out align ment occurs like engine running reinstall bearing engine put ground-out side next crankcase Like ideas youll find some guys swear ing technique others swearing ot might slight power penalty because extra friction its lot cheaper us ing high-tech bearingsand have known come apart reconditioned ones wont Dan Rutherfords group has using allstock-part Fox Mk Vis doesnt mean engines really stock like right-out-of-thebox just no after-market parts used Dan said lot trouble exces sive expansion piston think causes lot broken rod problems other engines Contrary common practice just lap piston take down high spots material will polished off piston off hard chrome cylinder fit rod both wrist pin crankpin important because galls either places itll probably break rod wrist pin especially critical Mark VIs cause held place piston roll pin can rotate piston Duke Fox can give timing specifications will greatly improve engine Crank timing seems make lot difference intake port timing Exhaust timing limited prop want pull Unfortunately experience gained going too farbut thats fast guys found out make engines run Has anyone worked OS 32 youve good suc cess let rest us know about modifica tions Mall Show/Weinreich Continued page 65 SAM Seattle Sky Raiders Control Line club asked unable tend Putting mall show relatively new experience clubs Though previous show taken place several years ago Mr Benjamin said learned lot organizing show offered follow ing suggestions club contemplating putting show its own Have enough tables Almost club brought models could fit four tables allotted Have railings out away table models cant handled Skirts railings helpful keep toddlers walking under Check mall security few years ago show tried another mall Puget Sound area modelers hard time protecting planes Fortunately case Capital Mall club wants sell models like AMA Delta Dart clear first mall officials Flying Indoor models great attention getter Ms Brown also some advice club approaches marketing direc tor about staging mall show Put proposal writing telling director what show will about what equipment will needed clubs will involved etc said everyones standards show CAPACITIVEDISCHARGE IGNITION SYSTEM fssturint EIETRO1{1CALLY CONTECLIED ADvANCE Basic unit LECTRONIC CIRCUITRY REPLACES ARY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAP! Par complete inSormation send selladdressed stamped 174 Model Aviation NORTH AMERICAN YAT-28-E SCA E 66 SPAN 60 LENGTH 8 ESENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware Factory Approved 3 Views Ply Capped Cowl Wing J Saddle & Surfaces JigBuiltFlyingSurfaces* Scale Spinner & Prop BladesC$15995 ping &4. order call write 7t GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 CHIPMUNK 850$23995 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-482-6188
Edition: Model Aviation - 1990/01
Page Numbers: 63, 172, 173, 174
UP Great White North Canadians own Combat team trials past July se lect team compete CL World Champi onships held France summer Pat MacKinzie Ron Malcolm Dave Lovgren will 1990 Canadian team Ross Melhuish alternate member failing make top spots first time since Combat came official FAI World Championship event Paul Smith reported both Malcolm Lovgren used Nelson-powered all-foam Mon archs Steve Kott did pitting Pat MacKinzie also used Nelson power Russian-style models constructed balsa/hard wood/foam composite materials Melhuish used familiar 1980-Doroschenko-style models Pauls report mentioned streamer-hook weakness effectively cured Winners Combat regular Canadian Na tionals included Pat MacKinzie taking Slow Com bat Wally Kruger Fast Combat Paul Smith FAI Mike Palermo /2A events run double-elimination except FAI single-elimination used traditional two-airplane format Team trials winner Pat MacKinzie taken out first round FAI Steve Kott Frank Boden member Dreaded Cana dian Contingent sent report Bladder Grabbers 89 version meet took place just couple weeks before US AMA Nats $10000 prizes seemed attract top fliers took about 200 matches decide winner triple-elimination contest First place taken John Salvin IV younger two Salvins currently com pete Second Steve Stewart best showing career Previous Bladder Grabber Money Meet winner Michael Willcox third followed Mike Petri always around top spots runner-up previ ous year Bob Carver thc mccts sponsor placed fifth Bob has flying exceptionally well has models very similar used Nats-winner Norm McFadden Ofttimes Bladder Grabber meet new designs introduced except reengineered models using carbon-fiber aluminum boomsand copies Steve Hills Arrowplanethere wasnt anything revolution ary time Boden mentioned problems burst bladders because high temperatures meet first practice day US FAt team tri als found us major needle-setting problems engines can simulate local field turning needle about halfturn should New bladders glow plugs head shims tried nothing seemed work until changed different Continued page 172 January 1990 63 Control Line Combat Charlie Johnson 3716 Ingraham St San Diego CA 2IO9 Fast Combat winners 1989 Bladder Grabber meet Snohomish WA L-R Bob Carver 5thmeet sponsor John Salvin IV winner Steve Stewart 2nd Michael WilIcox 3rd Mike Petrl 4th Contest famed its $10000 prizes Frank Von Boden took photo Charlie lost notes lA Combat model Would owner please send note full credit can given Note TD power pacifier fuel tank external controls lots light ening holes foam wing cores film-covered stab lots dead weight cut out Canadas national Combat team will head CL World Champs Top-to-Bottom Pat MacKlnzie 1st Ron Malcolm 2nd Dave Lovgren 3rd Paul Smith photo Fast uomoat winners tne July 195w uni cago meet L-R Bob Oge 3rd Dave Fisch er 2nd Steve Wilk 1st Tom Zon plc THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Junior Senior champs need compete headto-head against Open champion would no longer exist possibility quite controversial fliers feel such format would effectively ex clude Juniors Seniors future par ticipation Walker Cup flyoff may prove case evi dence past argues against Names like Werwage Cipra Adamisin proof posi tive excellence rises top regardless age Besides flip side coin un der skill class format entirely possible five top Expert class fliers could Jun iors Seniors would us old duffers standing sidelines CL Racing/Ballard Continued page 62 Pitmans finger protection have asked several occasions recommend best type glove pitman use Over years have found all-leather glove absolutely best gloves use fiber body leather trim just too stiff good flexible fin ger movement Remember pitmans right hand generally used adjust needle valve open fuel shutoffs require good smooth finger movement flip propwhich man dates protection kickback Racing engine addition people like glove can cinched up wrist photos shows well-used leather glove discarded after Racing campaigns As can see flip-finger has fi nally become cut mangled no longer fers protection pitmans digit cinching glove up near wrist glove held sta tionary hand reduces slippage grabbing aircraft landing glove actu ally acts damping unit pitman catches airplane either prop nut wing leather glove much slipresistant grabbing Racer covered oil during fast pit stop pitmen prefer gloves have no lining flexible yet have dense leather through out fingers palm Half-A Mouse Racing spent portion spring summer working Cox 049 en gines After receiving several tips fellow Mouse Racing enthusiasts found great deal problem involved varnish building up piston bore liner 1988 1 50 seconds shy qualifying final race whereas 1989 finished fi nals Open Mouse four seconds off winners time used exactly same airplanes engines except year started using 0000 steel wool wooden dowel rod re move varnish cylinder 25-30 runs past would experience acceptable per formance several minutes find engine performance would deteriorate run ning slowly poor starting charac teristics would almost impossible find proper needle valve setting found cleaning varnish cylinder restored origi nal performance movement needle valve nearly critical able work propeller combinations improve airspeed certainly cannot emphasize enough varnish-bedeviled cylinder must cleaned regular basis consistent performance ob tamed little engines As always solicit photos comments CL Combat/Johnson Continued page 63 fuel fuel wed using brand-new gallon produced well-known commercial maker After switch everything back normal manufacturer heard about misfortunes got contact sent case sorted fuels having various nitro contents us test never able duplicate prob lems previously encountered fuel ran perfectly have developed some new theories probable causes troubles Most com mercial fuels contain additive packages pre vent foaming hard tanks tanks detergents keep engine clean something keep residue rusting innards en gine well things improve film strength lubricant etc additives may wonders power cleanliness longevity thought maybe attacked bladder material residue attack clogging needle valves thereby making overly lean settings Because high pressure produced bladders have run needle valves al closed off get right mixture typical Supertigre needle 35 might set -3A turn out fully seated position suctionfed engine same type might require nee dle set three four full turns out What means needle valve assemblies eatI U I11 reds cowls kits plans Strong lightweight one-piece constwction Exact duplicates manufacturers original Also radial cowls wheelpants SendSl lJOfora-pg brochure Orcall 703-890-60179 am-9 pm EDT phone orders information FIBERGLASS MDePtMARIlBOXS3O Goodview VA 24095 172 Model Aviation hL W202 1/4 SCALE GLIDER KIT Premium Quality Kit European Quality American Technology Piece Gel-coated Fuselage Pre-Manufactured Wings w/Carbon Fiber Spars Obechi sheeting • Slope Thermal 000 plus $25 Shipping 1/4 & 1/5 Scale Glider Retracts Precision Machined Aerospace Specs Made 6061 T6 Aluminum 650 plus $5 Shipping & Handling 5 Feat Long 1/16 Misic Wire Pushrods Nylon Outer Casing 63 ma plus $3 Shipping SCALE GLIDER COMPONENTS 7024 Fm PH. CarImbid 0* 92009 6193 921-1439 CA Residents add 7% Send stamped ennelope info ily clogged foreign material using pressure-bladder tanks engines acted like something needle nothing ever found remember problems xylene fuel used clubs one-fluid-ounce Racing event melted some plastics did something castor oil made turn stringy always hear about alcohol tries reach out grab moisture right Out air its really too busy trying evaporate What can happen warm moist air fuel container may condense walls container store garage after flying session moisture runs down inner walls container fuel suggestion fuel manufacturer top off fuel can get home using fuel container has remained ga rage worrying about moisture get ting fuel alcohol nitro busy getting out fuel evaporation As al cohol nitro evaporated percentage oil increased leave lid off fuel bottle hot day get lots dirt weeds fuel some high-oil-content fuel runs hot makes less power before prone flameouts Only much oil engine needs proper lubrication should fuel wont find people can will give swer question much oil enough testing one-ounce Racing event tried oil contents around 30% found though quantity fuel pass ing through engine about half normal give lot laps percentage oil 20% lower Most commercial fuels around figure because safe theyre go ing risk problems just get last rpm En gines really like run fuel 16% oil content Dan Rutherford telling group runs 7% Delta oil 5% castor commer cial guys have secret oils additives good old castor oil Ucon 625 has used great success range 16%-20% years Union Carbide makes LB625 should able get good chemical supply house Also buy best grade alcohol 98%-pure nitro can find can buy ingredients good big boys use take greater pains keeping quality up during manufacture thats Ive found easier cheaper just buy fuel works well engines Save exotic fuel special occasions youre testing dont need reliability Have heard about full-complement bear ings 35s really tear up rear bearings revs load get too high Usually retainer comes apart takes out new liner pis ton some nice expensive bearings feature phenolic cages solve problem Theres another way preferred can practice old blown-up bearings Pull out whats left retainer measure diameter balls dont have caliper micrometer just take ball down local bearing house can buy small box balls comparative size very little money now go home fill old bearing ca pacity new ballsbut theres still step left accomplish before doing Take Dremel Moto Tool grind relief Oily 7ay Fly Galaxy 8 Computer JR Galaxy 8 PCM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiCds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differential aileron v-tail mix elevator-flap mix 4 free mix programs , Available your___ local hobby dealer LJUI7tH11ICS Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 January 1990 173 Ualaxy experience Great Performance Quartet $23995 DALOTEL 850 SPAN 69 InsWING AREA 830 sq ins ZTRA 230 SPAN 76 WING AREA 900 sq ins $23995 ZLIN 526 SPAN 72 insWING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors Happy Holidays available direct select hobby shops c ZIMPRO MARKETINO I- inner outer races allow insert last ball two 1 did bearing still piece old retainer place Wash bits grindings Out bearing really well discard old balls since have whole box full new ones use up Youll able insert new balls new indentations races line up course balls can fall back out align ment occurs like engine running reinstall bearing engine put ground-out side next crankcase Like ideas youll find some guys swear ing technique others swearing ot might slight power penalty because extra friction its lot cheaper us ing high-tech bearingsand have known come apart reconditioned ones wont Dan Rutherfords group has using allstock-part Fox Mk Vis doesnt mean engines really stock like right-out-of-thebox just no after-market parts used Dan said lot trouble exces sive expansion piston think causes lot broken rod problems other engines Contrary common practice just lap piston take down high spots material will polished off piston off hard chrome cylinder fit rod both wrist pin crankpin important because galls either places itll probably break rod wrist pin especially critical Mark VIs cause held place piston roll pin can rotate piston Duke Fox can give timing specifications will greatly improve engine Crank timing seems make lot difference intake port timing Exhaust timing limited prop want pull Unfortunately experience gained going too farbut thats fast guys found out make engines run Has anyone worked OS 32 youve good suc cess let rest us know about modifica tions Mall Show/Weinreich Continued page 65 SAM Seattle Sky Raiders Control Line club asked unable tend Putting mall show relatively new experience clubs Though previous show taken place several years ago Mr Benjamin said learned lot organizing show offered follow ing suggestions club contemplating putting show its own Have enough tables Almost club brought models could fit four tables allotted Have railings out away table models cant handled Skirts railings helpful keep toddlers walking under Check mall security few years ago show tried another mall Puget Sound area modelers hard time protecting planes Fortunately case Capital Mall club wants sell models like AMA Delta Dart clear first mall officials Flying Indoor models great attention getter Ms Brown also some advice club approaches marketing direc tor about staging mall show Put proposal writing telling director what show will about what equipment will needed clubs will involved etc said everyones standards show CAPACITIVEDISCHARGE IGNITION SYSTEM fssturint EIETRO1{1CALLY CONTECLIED ADvANCE Basic unit LECTRONIC CIRCUITRY REPLACES ARY MECHANICAL ADVANCE MAKES MAGNETO CONVERSIONS SNAP! Par complete inSormation send selladdressed stamped 174 Model Aviation NORTH AMERICAN YAT-28-E SCA E 66 SPAN 60 LENGTH 8 ESENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware Factory Approved 3 Views Ply Capped Cowl Wing J Saddle & Surfaces JigBuiltFlyingSurfaces* Scale Spinner & Prop BladesC$15995 ping &4. order call write 7t GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 CHIPMUNK 850$23995 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-482-6188