S Sport-Aerobalics EJRon VanPutte IN AUTOMOBILES may year cat RC pattern com petition year pipe Rossi 60 sporting tuned pipe has become exciting power combination early 1977 competition year Rossi/pipe combination has already changed char acter pattern maneuvers because tremendous power available Now 400- 600-foot diameter loops easily possible tops Figure M Top Hat maneuvers can placed high flier desires However extremely high speeds result extra power causes perception problem during turn arounds either end presentation area airplane tends get out com fortable viewing range quickly is necessary throttle back end maneuvers situation al ready familiar RC speed airplane fliers could lead experimentation autopilots keep wings level during turnaround some RC speed fliers like Maynard Hill have done too soon tell what implica tions having such potent power combination However vibration protec tion airborne radio system will come increasingly important preclude problems addition aircraft strength fatigue factors will have care fully considered physical integration bulky pipe pattern aircraft has al ready produced interesting design Ron Chidgeys new Tiger Tail III uses fuselage foredeck canopy area hide pipe few feet away difficult detect presence pipe very attractive practical solution fliers will imitate future would have suspected technical advance could have such startling effect already sophisticated competition event talking Ron Chidgey flight line 17th annual Rocket City Radio Control Club contest Huntsville Ala bama Ron watched pilot difficulty starting engine barely managed announce takeoff ma neuver before starting time ran out forced rush airborne part alloted time spoiling maneuvers fact difficulty starting engine often spoils per formance airborne maneuvers main reason competition first place doesnt sit well him Ron Chidgey lieves engine starting time air borne maneuver time should separate distinct agrec him starting time two minutes established classes maneuver times eight minutes Novice Ad vanced nine minutes Expert Master total allotted time would ten 11 minutes respectively com plete flights However since pilots dont have engine starting problems Continued page 89 September1977 19 HossI 513 wIth tuned pipe Larry OtUs new airplane tremenaous power OT mis package manes airplane much faster spite drag producing installation Raymond Teliczan pic Because significant boost performance top pattern fliers using pipe two pictures show Ron Chidgey hid Rossi 60 its pipe new Tiger Tail Three design author details column exciting effects pipe maneuvers Airplanes thing Want find out what real world sport aviation about youll want information EAA homebuilts antiques classics warbirds gliders rotary wing aerobatics other type sport aircraft turn Find out what takes build aircraftor design can join EAA chapter near benefit experience skills other builders EAA membership $2000 per year includes monthly SPORT AVIATION Junior membership 18 younger $1000 Information pack $150 touches slug Thats enough month Write have ideas column George M Myers 70 Froehlich Farm Rd Hicks vile NY 11801 Letters Editor continued page 54 Side Side seems news local districts including District 5 pertains club activities would eas ily believe club membership literally no activity hobby Although two excellent RC clubs Jacksonville area group us belong club other AMA get together usually Saturday Sunday holidays informally fly ing site provided through good aus pices Col Ernie Moser son Jim Moser Aero Sport Inc fixedbase operators St Augustine Municipal Airport designated area part air port no longer used 5000-ft runway taxiways runway provide additional runways RC models thereby affording us landings takeoffs whatever direction prevailing winds may Although has oft said RC flying full-sized aircraft dont mix believers misinformation ought see just well get along gether example whenever fullsized planes use runway taxiway immediately give right way Common sense instead lot rules regulations prevail keep out landing patterns Most pilots aircraft owners take keen interest RC aviation some have taken up hobby some RC flyers taking flying lessons St Augustine Airport home base Mosers Flying Circus treated aerobatic air show practice next air show duplicate maneuvers cases go better Jim Moser stars show converts RC flying pleasure watch him same maneuvers RC Skybolt does full-sized field Aubrey Radford well known RC helicopter flying also group something fantastic fixed wing well Just last week climbed aboard J-3 Cub flew RCM-60 trainer OS Max Schnuerle 40 15 oz fuel tank alongside Cub Side side taxied took off flew out pattern over St Augustine Pic tures taken second plane over famous Matanzas Fort J-3 its little companion Once again flew back airport pattern landed side side exam ple enjoy flying together Club flying fine like it certainly way enjoy hobby Phil Abrams AMA 43141 Jacksonville FL RC Aerobatics/VanPutte continued page 19 average total time classes probably would increase few sec onds over total flight times nine ten minutes respectively per mitted now think AMA rules should changed accordingly Comments also talked Jerry Clifton Huntsville contest Jerry said Bruce Un derwood advised him since al ways rolled airplane right could get what amounted aileron differ ential making right aileron move left aileron opened mouth expecting sorts reasons wouldnt work come spewing out nothing happened couldnt think single reason pattern airplane couldnt set up way besides would very easy course September 1977 89 ABuck Half thats need send big EAA info pack shown above Tells about EAA benefits EAA membership will mean Send buck half today Includes recent issue SPORT AVIATION EAA/SPGRT AVIATIQN ~pExperimental AircraftBox 229 Association Inc_____________ H ales corners Wis 53130 Milwaukee SuburbHIAS UT Phone 414 425-4860ALL SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send Si complete catalog Add 550 1st Class mail returnl AU I/C Urn 511E HIGGINSVILLE MISSOURI 64037 rolling left would hampered adverse yaw rolling maneuvers performed right results would identical airplane set up aileron differential ma neuvers pilots dont have choice way roll during takeoff landing since rolling motion dur ing maneuvers gentle effect adverse yaw would negligible during left-hand takeoff landing traffic pat terns pilot performs rolling ma neuvers left everything said valid swap left right above paragraph Great idea received nice letter Ken Gray Austin Texas Ken responding review Astro Flight RC System Analyzer-Rapid Charger Ken would like use rapid charge feature taba system advised against Futaba because transmitter uses slowcharge-rate batteries though re ceiver uses high-rate ones Ken wanted know tried unit Futaba radio havent experience Fu taba radios cant comment use rapid charge feature radio question brings up very impor tant point wouldnt very profound observe nickel cadmium batteries same some fliers may realize just much different can basically three charge rates associated nickel cadmium batteries normal charge batteries charged 10-14 hours rate consistent capacity 500 milliampere-hour cells 50 milliamperes quick charge batteries charged 3-5 hours fast charge batteries require about hour Most older radios use normal charge batteries newer radios use quick charge bat teries dont know radios use fast charge batteries view above may well ask rapid charger unit can used charge batteries 15 minutes Most nickel cadmium batteries can charged rate much higher cells rated foruntil become fully charged charged high rate after become fully charged cells will damaged battery manu facturers understand people dont carefully monitor charge condi tion batteries Consequently batteries rated what manufac turers call maximum overcharge ratethe rate batteries can tolerate long after become fully charged high quality rapid chargers able overcome battery limitations monitor ing battery voltage shutting off fully charged condition reached also received letter Grep Kal lemeyn graduate student geo chemistry geophysics UCLA wrote response problem soaking engine parts rubbing alcohol May 1977 ModelAviation According Greg Household rubbing alcohol con tains approximately 70% isopropyl alcohol 30% water Thus soaking metal parts two weeks will have same re sults soaking water two weeks will oxidize corrode Actual ly isopropyl alcohol isnt very good sol product review product review product review vent use Denatured ethyl alcohol etha nol much better contains ap proximately 5% water Still parts should soaked much shorter periods time Paint lacquer thinners pe troleum distillates mix water therefore dont have above prob lems parts soaked Thanks good information Greg Still another letter received Henry Buchanan Anchorage Alaska took task mentioning people up north put up radio gear November March After thinking about owe apology hardy fliers fly radio-controlled air planes year long born raised Rochester New York theres part country gets snow Id hate visit does Unfortunately cant stand cold weather did put up radio gear winter living up north According letter Anchorage have best flying conditions winter bright sunshiny days smooth air snow snow cleaner fly easier beginner fly easier airplanes tip over time fed up snow skiis time fly dirt wheels time fed up dirt wheels time snow skiis ends up about six months would funny see Phoenix 6s Dirty Birdys Mach ls etc built conventional gear airplanes because trike skiis dont work too well Winter build ing time because can fly until about 230 pm summer differ ent can fly until 1100 pm night Thanks Henry Buchanan look another fascinating aspect great hobby Ron Van Putte 12 Connie Drive Shahmar FL 32579 NEXT U MONTH THE TENTH WORLD CHPMPIONSHIPS FOR RIC AEROBATICS Join Ron VanPutte talks men machines flying An 8page report words pictures RC Pylon/Lane continued page 21 first-place hardware Bob leading race way Terry flamed out Tom Christopher cut fly-off Ed Hotelling able cruise race fourth Boyce Atzei won heats handily seventh ninth re spectively Terry Prather won fast time perpet ual trophy third time gets 90 Model Aviation product review product review product review Ultimate Dragmaster Honored FFS top A12 1976 exceptionally easy build high-performance Nordic Span 79 parts machine cut Deluxe kit avail able mail order overseas customers write international prices $2250 cludes US shipping Partial kit plans strip woodgood back-up re placement model$125O RN Enterprises 3255 NW Crocicer Lane Albany OR 97321
Edition: Model Aviation - 1977/09
Page Numbers: 19, 89, 90
S Sport-Aerobalics EJRon VanPutte IN AUTOMOBILES may year cat RC pattern com petition year pipe Rossi 60 sporting tuned pipe has become exciting power combination early 1977 competition year Rossi/pipe combination has already changed char acter pattern maneuvers because tremendous power available Now 400- 600-foot diameter loops easily possible tops Figure M Top Hat maneuvers can placed high flier desires However extremely high speeds result extra power causes perception problem during turn arounds either end presentation area airplane tends get out com fortable viewing range quickly is necessary throttle back end maneuvers situation al ready familiar RC speed airplane fliers could lead experimentation autopilots keep wings level during turnaround some RC speed fliers like Maynard Hill have done too soon tell what implica tions having such potent power combination However vibration protec tion airborne radio system will come increasingly important preclude problems addition aircraft strength fatigue factors will have care fully considered physical integration bulky pipe pattern aircraft has al ready produced interesting design Ron Chidgeys new Tiger Tail III uses fuselage foredeck canopy area hide pipe few feet away difficult detect presence pipe very attractive practical solution fliers will imitate future would have suspected technical advance could have such startling effect already sophisticated competition event talking Ron Chidgey flight line 17th annual Rocket City Radio Control Club contest Huntsville Ala bama Ron watched pilot difficulty starting engine barely managed announce takeoff ma neuver before starting time ran out forced rush airborne part alloted time spoiling maneuvers fact difficulty starting engine often spoils per formance airborne maneuvers main reason competition first place doesnt sit well him Ron Chidgey lieves engine starting time air borne maneuver time should separate distinct agrec him starting time two minutes established classes maneuver times eight minutes Novice Ad vanced nine minutes Expert Master total allotted time would ten 11 minutes respectively com plete flights However since pilots dont have engine starting problems Continued page 89 September1977 19 HossI 513 wIth tuned pipe Larry OtUs new airplane tremenaous power OT mis package manes airplane much faster spite drag producing installation Raymond Teliczan pic Because significant boost performance top pattern fliers using pipe two pictures show Ron Chidgey hid Rossi 60 its pipe new Tiger Tail Three design author details column exciting effects pipe maneuvers Airplanes thing Want find out what real world sport aviation about youll want information EAA homebuilts antiques classics warbirds gliders rotary wing aerobatics other type sport aircraft turn Find out what takes build aircraftor design can join EAA chapter near benefit experience skills other builders EAA membership $2000 per year includes monthly SPORT AVIATION Junior membership 18 younger $1000 Information pack $150 touches slug Thats enough month Write have ideas column George M Myers 70 Froehlich Farm Rd Hicks vile NY 11801 Letters Editor continued page 54 Side Side seems news local districts including District 5 pertains club activities would eas ily believe club membership literally no activity hobby Although two excellent RC clubs Jacksonville area group us belong club other AMA get together usually Saturday Sunday holidays informally fly ing site provided through good aus pices Col Ernie Moser son Jim Moser Aero Sport Inc fixedbase operators St Augustine Municipal Airport designated area part air port no longer used 5000-ft runway taxiways runway provide additional runways RC models thereby affording us landings takeoffs whatever direction prevailing winds may Although has oft said RC flying full-sized aircraft dont mix believers misinformation ought see just well get along gether example whenever fullsized planes use runway taxiway immediately give right way Common sense instead lot rules regulations prevail keep out landing patterns Most pilots aircraft owners take keen interest RC aviation some have taken up hobby some RC flyers taking flying lessons St Augustine Airport home base Mosers Flying Circus treated aerobatic air show practice next air show duplicate maneuvers cases go better Jim Moser stars show converts RC flying pleasure watch him same maneuvers RC Skybolt does full-sized field Aubrey Radford well known RC helicopter flying also group something fantastic fixed wing well Just last week climbed aboard J-3 Cub flew RCM-60 trainer OS Max Schnuerle 40 15 oz fuel tank alongside Cub Side side taxied took off flew out pattern over St Augustine Pic tures taken second plane over famous Matanzas Fort J-3 its little companion Once again flew back airport pattern landed side side exam ple enjoy flying together Club flying fine like it certainly way enjoy hobby Phil Abrams AMA 43141 Jacksonville FL RC Aerobatics/VanPutte continued page 19 average total time classes probably would increase few sec onds over total flight times nine ten minutes respectively per mitted now think AMA rules should changed accordingly Comments also talked Jerry Clifton Huntsville contest Jerry said Bruce Un derwood advised him since al ways rolled airplane right could get what amounted aileron differ ential making right aileron move left aileron opened mouth expecting sorts reasons wouldnt work come spewing out nothing happened couldnt think single reason pattern airplane couldnt set up way besides would very easy course September 1977 89 ABuck Half thats need send big EAA info pack shown above Tells about EAA benefits EAA membership will mean Send buck half today Includes recent issue SPORT AVIATION EAA/SPGRT AVIATIQN ~pExperimental AircraftBox 229 Association Inc_____________ H ales corners Wis 53130 Milwaukee SuburbHIAS UT Phone 414 425-4860ALL SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send Si complete catalog Add 550 1st Class mail returnl AU I/C Urn 511E HIGGINSVILLE MISSOURI 64037 rolling left would hampered adverse yaw rolling maneuvers performed right results would identical airplane set up aileron differential ma neuvers pilots dont have choice way roll during takeoff landing since rolling motion dur ing maneuvers gentle effect adverse yaw would negligible during left-hand takeoff landing traffic pat terns pilot performs rolling ma neuvers left everything said valid swap left right above paragraph Great idea received nice letter Ken Gray Austin Texas Ken responding review Astro Flight RC System Analyzer-Rapid Charger Ken would like use rapid charge feature taba system advised against Futaba because transmitter uses slowcharge-rate batteries though re ceiver uses high-rate ones Ken wanted know tried unit Futaba radio havent experience Fu taba radios cant comment use rapid charge feature radio question brings up very impor tant point wouldnt very profound observe nickel cadmium batteries same some fliers may realize just much different can basically three charge rates associated nickel cadmium batteries normal charge batteries charged 10-14 hours rate consistent capacity 500 milliampere-hour cells 50 milliamperes quick charge batteries charged 3-5 hours fast charge batteries require about hour Most older radios use normal charge batteries newer radios use quick charge bat teries dont know radios use fast charge batteries view above may well ask rapid charger unit can used charge batteries 15 minutes Most nickel cadmium batteries can charged rate much higher cells rated foruntil become fully charged charged high rate after become fully charged cells will damaged battery manu facturers understand people dont carefully monitor charge condi tion batteries Consequently batteries rated what manufac turers call maximum overcharge ratethe rate batteries can tolerate long after become fully charged high quality rapid chargers able overcome battery limitations monitor ing battery voltage shutting off fully charged condition reached also received letter Grep Kal lemeyn graduate student geo chemistry geophysics UCLA wrote response problem soaking engine parts rubbing alcohol May 1977 ModelAviation According Greg Household rubbing alcohol con tains approximately 70% isopropyl alcohol 30% water Thus soaking metal parts two weeks will have same re sults soaking water two weeks will oxidize corrode Actual ly isopropyl alcohol isnt very good sol product review product review product review vent use Denatured ethyl alcohol etha nol much better contains ap proximately 5% water Still parts should soaked much shorter periods time Paint lacquer thinners pe troleum distillates mix water therefore dont have above prob lems parts soaked Thanks good information Greg Still another letter received Henry Buchanan Anchorage Alaska took task mentioning people up north put up radio gear November March After thinking about owe apology hardy fliers fly radio-controlled air planes year long born raised Rochester New York theres part country gets snow Id hate visit does Unfortunately cant stand cold weather did put up radio gear winter living up north According letter Anchorage have best flying conditions winter bright sunshiny days smooth air snow snow cleaner fly easier beginner fly easier airplanes tip over time fed up snow skiis time fly dirt wheels time fed up dirt wheels time snow skiis ends up about six months would funny see Phoenix 6s Dirty Birdys Mach ls etc built conventional gear airplanes because trike skiis dont work too well Winter build ing time because can fly until about 230 pm summer differ ent can fly until 1100 pm night Thanks Henry Buchanan look another fascinating aspect great hobby Ron Van Putte 12 Connie Drive Shahmar FL 32579 NEXT U MONTH THE TENTH WORLD CHPMPIONSHIPS FOR RIC AEROBATICS Join Ron VanPutte talks men machines flying An 8page report words pictures RC Pylon/Lane continued page 21 first-place hardware Bob leading race way Terry flamed out Tom Christopher cut fly-off Ed Hotelling able cruise race fourth Boyce Atzei won heats handily seventh ninth re spectively Terry Prather won fast time perpet ual trophy third time gets 90 Model Aviation product review product review product review Ultimate Dragmaster Honored FFS top A12 1976 exceptionally easy build high-performance Nordic Span 79 parts machine cut Deluxe kit avail able mail order overseas customers write international prices $2250 cludes US shipping Partial kit plans strip woodgood back-up re placement model$125O RN Enterprises 3255 NW Crocicer Lane Albany OR 97321
Edition: Model Aviation - 1977/09
Page Numbers: 19, 89, 90
S Sport-Aerobalics EJRon VanPutte IN AUTOMOBILES may year cat RC pattern com petition year pipe Rossi 60 sporting tuned pipe has become exciting power combination early 1977 competition year Rossi/pipe combination has already changed char acter pattern maneuvers because tremendous power available Now 400- 600-foot diameter loops easily possible tops Figure M Top Hat maneuvers can placed high flier desires However extremely high speeds result extra power causes perception problem during turn arounds either end presentation area airplane tends get out com fortable viewing range quickly is necessary throttle back end maneuvers situation al ready familiar RC speed airplane fliers could lead experimentation autopilots keep wings level during turnaround some RC speed fliers like Maynard Hill have done too soon tell what implica tions having such potent power combination However vibration protec tion airborne radio system will come increasingly important preclude problems addition aircraft strength fatigue factors will have care fully considered physical integration bulky pipe pattern aircraft has al ready produced interesting design Ron Chidgeys new Tiger Tail III uses fuselage foredeck canopy area hide pipe few feet away difficult detect presence pipe very attractive practical solution fliers will imitate future would have suspected technical advance could have such startling effect already sophisticated competition event talking Ron Chidgey flight line 17th annual Rocket City Radio Control Club contest Huntsville Ala bama Ron watched pilot difficulty starting engine barely managed announce takeoff ma neuver before starting time ran out forced rush airborne part alloted time spoiling maneuvers fact difficulty starting engine often spoils per formance airborne maneuvers main reason competition first place doesnt sit well him Ron Chidgey lieves engine starting time air borne maneuver time should separate distinct agrec him starting time two minutes established classes maneuver times eight minutes Novice Ad vanced nine minutes Expert Master total allotted time would ten 11 minutes respectively com plete flights However since pilots dont have engine starting problems Continued page 89 September1977 19 HossI 513 wIth tuned pipe Larry OtUs new airplane tremenaous power OT mis package manes airplane much faster spite drag producing installation Raymond Teliczan pic Because significant boost performance top pattern fliers using pipe two pictures show Ron Chidgey hid Rossi 60 its pipe new Tiger Tail Three design author details column exciting effects pipe maneuvers Airplanes thing Want find out what real world sport aviation about youll want information EAA homebuilts antiques classics warbirds gliders rotary wing aerobatics other type sport aircraft turn Find out what takes build aircraftor design can join EAA chapter near benefit experience skills other builders EAA membership $2000 per year includes monthly SPORT AVIATION Junior membership 18 younger $1000 Information pack $150 touches slug Thats enough month Write have ideas column George M Myers 70 Froehlich Farm Rd Hicks vile NY 11801 Letters Editor continued page 54 Side Side seems news local districts including District 5 pertains club activities would eas ily believe club membership literally no activity hobby Although two excellent RC clubs Jacksonville area group us belong club other AMA get together usually Saturday Sunday holidays informally fly ing site provided through good aus pices Col Ernie Moser son Jim Moser Aero Sport Inc fixedbase operators St Augustine Municipal Airport designated area part air port no longer used 5000-ft runway taxiways runway provide additional runways RC models thereby affording us landings takeoffs whatever direction prevailing winds may Although has oft said RC flying full-sized aircraft dont mix believers misinformation ought see just well get along gether example whenever fullsized planes use runway taxiway immediately give right way Common sense instead lot rules regulations prevail keep out landing patterns Most pilots aircraft owners take keen interest RC aviation some have taken up hobby some RC flyers taking flying lessons St Augustine Airport home base Mosers Flying Circus treated aerobatic air show practice next air show duplicate maneuvers cases go better Jim Moser stars show converts RC flying pleasure watch him same maneuvers RC Skybolt does full-sized field Aubrey Radford well known RC helicopter flying also group something fantastic fixed wing well Just last week climbed aboard J-3 Cub flew RCM-60 trainer OS Max Schnuerle 40 15 oz fuel tank alongside Cub Side side taxied took off flew out pattern over St Augustine Pic tures taken second plane over famous Matanzas Fort J-3 its little companion Once again flew back airport pattern landed side side exam ple enjoy flying together Club flying fine like it certainly way enjoy hobby Phil Abrams AMA 43141 Jacksonville FL RC Aerobatics/VanPutte continued page 19 average total time classes probably would increase few sec onds over total flight times nine ten minutes respectively per mitted now think AMA rules should changed accordingly Comments also talked Jerry Clifton Huntsville contest Jerry said Bruce Un derwood advised him since al ways rolled airplane right could get what amounted aileron differ ential making right aileron move left aileron opened mouth expecting sorts reasons wouldnt work come spewing out nothing happened couldnt think single reason pattern airplane couldnt set up way besides would very easy course September 1977 89 ABuck Half thats need send big EAA info pack shown above Tells about EAA benefits EAA membership will mean Send buck half today Includes recent issue SPORT AVIATION EAA/SPGRT AVIATIQN ~pExperimental AircraftBox 229 Association Inc_____________ H ales corners Wis 53130 Milwaukee SuburbHIAS UT Phone 414 425-4860ALL SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send Si complete catalog Add 550 1st Class mail returnl AU I/C Urn 511E HIGGINSVILLE MISSOURI 64037 rolling left would hampered adverse yaw rolling maneuvers performed right results would identical airplane set up aileron differential ma neuvers pilots dont have choice way roll during takeoff landing since rolling motion dur ing maneuvers gentle effect adverse yaw would negligible during left-hand takeoff landing traffic pat terns pilot performs rolling ma neuvers left everything said valid swap left right above paragraph Great idea received nice letter Ken Gray Austin Texas Ken responding review Astro Flight RC System Analyzer-Rapid Charger Ken would like use rapid charge feature taba system advised against Futaba because transmitter uses slowcharge-rate batteries though re ceiver uses high-rate ones Ken wanted know tried unit Futaba radio havent experience Fu taba radios cant comment use rapid charge feature radio question brings up very impor tant point wouldnt very profound observe nickel cadmium batteries same some fliers may realize just much different can basically three charge rates associated nickel cadmium batteries normal charge batteries charged 10-14 hours rate consistent capacity 500 milliampere-hour cells 50 milliamperes quick charge batteries charged 3-5 hours fast charge batteries require about hour Most older radios use normal charge batteries newer radios use quick charge bat teries dont know radios use fast charge batteries view above may well ask rapid charger unit can used charge batteries 15 minutes Most nickel cadmium batteries can charged rate much higher cells rated foruntil become fully charged charged high rate after become fully charged cells will damaged battery manu facturers understand people dont carefully monitor charge condi tion batteries Consequently batteries rated what manufac turers call maximum overcharge ratethe rate batteries can tolerate long after become fully charged high quality rapid chargers able overcome battery limitations monitor ing battery voltage shutting off fully charged condition reached also received letter Grep Kal lemeyn graduate student geo chemistry geophysics UCLA wrote response problem soaking engine parts rubbing alcohol May 1977 ModelAviation According Greg Household rubbing alcohol con tains approximately 70% isopropyl alcohol 30% water Thus soaking metal parts two weeks will have same re sults soaking water two weeks will oxidize corrode Actual ly isopropyl alcohol isnt very good sol product review product review product review vent use Denatured ethyl alcohol etha nol much better contains ap proximately 5% water Still parts should soaked much shorter periods time Paint lacquer thinners pe troleum distillates mix water therefore dont have above prob lems parts soaked Thanks good information Greg Still another letter received Henry Buchanan Anchorage Alaska took task mentioning people up north put up radio gear November March After thinking about owe apology hardy fliers fly radio-controlled air planes year long born raised Rochester New York theres part country gets snow Id hate visit does Unfortunately cant stand cold weather did put up radio gear winter living up north According letter Anchorage have best flying conditions winter bright sunshiny days smooth air snow snow cleaner fly easier beginner fly easier airplanes tip over time fed up snow skiis time fly dirt wheels time fed up dirt wheels time snow skiis ends up about six months would funny see Phoenix 6s Dirty Birdys Mach ls etc built conventional gear airplanes because trike skiis dont work too well Winter build ing time because can fly until about 230 pm summer differ ent can fly until 1100 pm night Thanks Henry Buchanan look another fascinating aspect great hobby Ron Van Putte 12 Connie Drive Shahmar FL 32579 NEXT U MONTH THE TENTH WORLD CHPMPIONSHIPS FOR RIC AEROBATICS Join Ron VanPutte talks men machines flying An 8page report words pictures RC Pylon/Lane continued page 21 first-place hardware Bob leading race way Terry flamed out Tom Christopher cut fly-off Ed Hotelling able cruise race fourth Boyce Atzei won heats handily seventh ninth re spectively Terry Prather won fast time perpet ual trophy third time gets 90 Model Aviation product review product review product review Ultimate Dragmaster Honored FFS top A12 1976 exceptionally easy build high-performance Nordic Span 79 parts machine cut Deluxe kit avail able mail order overseas customers write international prices $2250 cludes US shipping Partial kit plans strip woodgood back-up re placement model$125O RN Enterprises 3255 NW Crocicer Lane Albany OR 97321