I I b THE SUBJECT next few months engine speed control scale Carrier classes have talked about different speed control systems past conventional suction systems RC carburetors pen-bladder pressure systems large-bore modified carbs idle mixture control Suction systems offer competitive performance least amount difficulty few extra mph available pressurized fuel system worth extra effort involved past have described fuel system unless have used myself least test stand am making exception next few columns will discuss two pressure systems 1 on-off pressure 2 fuel meter Although have used fuel meter Carrier am going describe since very popular system used top-notch competitors Both systems rely exhaust restrictor primary means speed control use exhaust restrictor throttles model airplanes its origin Bob Smurthwaite G-S Products long before intake throttles devel oped reasonable degree Bob used exhaust restrictor normal suction venturi principle used on-off pressure system Before describe complete systems however want describe making fitting exhaust restrictor since component common both systems exhaust restrictor will describing steel slide valve rides slot cut engines exhaust stack rotary butterfly valves common RC engines before mufflers became popular fit tightly enough used effective throttle pre-Nats issue High-Low-Landing Newsletter CL Navy Carrier Society good photo article Harry Higley describing make install exhaust slide have some different materials sources Harry uses will mention summarize general method used Harry others install own slides Harry uses X0025 bandsaw blade making slotting saw slide slotting saw can also made hacksaw blade X-Acto saw blade #27 #15 * 15 ideal since narrow enough fit inside exhaust stack having cut down saws except few very old X-Acto blades have teeth set saw cut wider thickness blade itself use sides teeth must hammered and/or filed teeth saw wide thickness saw blade ne exnaust stack siotted making four seal properly have made cuts cuts first two cuts vertical cuts aug young foolish can narrow ends exhaust stack cuts very easily ruin case way Aug like just deep enough expose interior shown can made steel either screwed stack saw can inserted together assembled cyanoacrylate adinside exhaust stackCut 1 diagram hesive base jig held firmly against next two cuts Cut 2 made saw face exhaust stack jig provides inserted through first two cuts length accurate guide initial cuts exhaust stack last cuts provide slide itself should made steel groove slide ride should no Harry Higley uses bandsaw blades teeth deeper half wall thickness exhaust removed Hacksaw blades too brittle use stack extreme care should taken though price right prefer use cuts uniform depth along stack feeler gage stock available auto parts stores first cuts ends exhaust stack 12-in length adequate three four must parallel slide will either bind Continued page 122 December1979 37 exhaust slide tuel meter installation Harry Higley typical throttle systems used modelers Class II exhaust slide controls engine speed fuel meter controls fuel flow pressurized tank Drawing shows make exhaust slide see text tight fit important good operation jig slotting saw almost neces sityif dont feel enthusiastic about springing new crankcase planform alignment Install large nylon control horn Kwik Link wire pushrod guide omit pushrod guide because aerodynamic force stab during outside maneuvers will cause pushrod bowing less effective control outside maneuvers Slow Combat version uses same wing has standard balsa fuselage standard type nose Two pushrod guides required along long fuselage plane should balance motor prop installed 185% chord 1 -in rear leading edge bladder tube placed exactly along line prevent change center gravity fuel runs out center gravity second hole top control horn good starting point Fast Combat version should weigh 8 9 oz engine FAT version 8 8 oz Select slightly lighter wood FAT version Power Fast Slow Rongeurs MK III Fox Combat Special 25% nitro head clearance set 019 Power FAT version favorite high perforniance 151 like Fox 15 Take test flight check warps thrust misalignment usually minimal care taken during construction Rongeur will provide durable cheap easy build easy repair combat plane stable enough fly eyes-off yet tight turning enough competition hundreds others too numerous mention Joes impressive model faithfully duplicates unique features kind aircraft scored 258 static points tops Senior class Past wins include five first places second including first Junior Preci sion Scale 75 77 Nats B-25 scratch-built ves wingspan 25 5/16 inches overall length 21 inches According Joe model weighs pound half two mufflerized Cox 049 Space Hoppers flies 45 feet line flies either engine controlled Stanzel Stunt Master Monoline control unit entire model made balsa solid wings tail rudders hollowed-out fuselage used Aero-Gloss finish entire plane blue-tone white blue nacelle areas Dale adds interesting story relating Joes B-25 5X4 3-bladed props necessary extend flying time miscalculated tank sizes would fly about eight laps 50X016 line 5X3 props So slowed engine down 4-in pitch cut flying line down 45 feet runs about 12 14 laps both engines configuration Inclosing Im thrilled able feature up-close look two young competitors outstanding models because believe characteristic CL Scale modelings greatest strengths continued partici pation Junior Senior age modelers CL Scale degree seen other mode Scale flying Nationals have attended Junior Senior age contestants accounted between 40 50 percent total entries Its refreshing contrast trends noticeable other AMA events Scale Model Research Photos name service recently started Dale Willoughby make quality color photo packs unique fullscale aircraft available scale modelers Dale travels lot whenever possible photographs outstanding home-builts restored antiques interesting airplanes types encoun ters airports fly-ins museums result ing photo packs offers contain numerous views same subject aircraft crucial angies photo list #2 have just received describes packs 57 different aircraft including Wittman Tailwind Flying Flea Lockheed Orion P-26 Peashooter PT-22 Grumman Duck P-38s P-S P-40E on packs vary $550 $1750 per set contain 9 33 top quality color photos prints full 3X5A size 3AX5 means get full prints everything standard 35-mm negatives no spinners chopped off missing wing tips ordinarily free copy latest list send stamped self-addressed long envelope Dale Willoughby Scale Model Research Photos PO Box 675 Orange CA 92666 Now flying season winding down hope youll have time send some photos drawings ideas comments use column need contribution keep space interesting informative Dont forget ModelAviation will pay $5 item printed Mike Gretz Box 162 Montezuma L4 50171 CL Navy Carrier/Perry continued oage 37 slides feeler gage stock has advantage being available thickness desired use stock 0025 0030 depending thickness saw used slide very easily shaped using Dremel tool tungsten-carbide bits cut-off wheels cut-off wheel used router attachment excellent way make initial cut reduce slide approximate width desired Final trimming width should done drawing edge slide along file careful keep sides slide paralleL final polishing 320 grit finer paper should allow slide move freely still provide good seal opening slide should least large exhaust ports cylinder Larger betterwithin limits imposed size exhaust stack amount throttle move ment available need keep exhaust slide out back prop taper opening necessary provide manageable 122 Model Aviation GET ORGANIZED CL Scale/Gretz Hee 5 set 4 sia4y tiles hotds 4 yeas ot youi tavoite 8 t magazines continued page 35 4 MAG FILES $495 Send $496 plan $100 postage handling DOM INDUSTRIES PO BOX 388-K DOVER NH 03820 GEE BEE Z DECALS ALL NUMBERS 2in 1 SCALE & LETTERING EXCEPT THOSE OF THE WINGS GRANGER$4 95 POST WILLIAMS t8t PAWNEESTOSET SAN MARCOS CA F0RNA92069 throttle response around idle Future columns will describe fuel meters on-off pressure systems use exhaust slide want wait fuel meter like shown photo available Harry Higley 433 Arquilla Dr Glenwood IL 60425 Richard L Perry 5016 Angelita Ave Day ton OH 45424 CL Aerobatics/Paul continued page 38 outlet plastic handle Richard Byron has cables tested local college said broke around 100 pounds pull very good still some Control Specialties In-flite adjustable handles available although Bob Hunt now working Flying Models high density foam handle has wide spacing very good cable George Aldrich handle designed George after used years good light weight handle cable very strong Georges handles several colors plastic part handle Fox makes steel handle large wooden grip handle has two line spacing positions wooden grip real handful can sanded carved conform hand Bob Baron designed handle has magazines two occasions MAN August 1970 ModelAviation April 1977 adjustable handle basis marketed Gene Martine Custom Master Products Jacksonville Fla handle favorite USA team member Gene Schaffer well several other Eastern fliers Sullivan Products also has plastic handle nine adjustments may fit -- hand want build own handle certain pull-test well before using electrical equipment get everything plain old 1 volt battery two alligator clips using Du-Bro Kwik Gb go-plug connector No DU-KG-147 using awet cell Wet cells usually 2 volts need recharging will blow out weak plug whats sense having weak plug anyway Getting very popular now Fusite GloBee Fireplug Charger costs about $3995 retail has ammeter built rechargeable will show plug flooded bumt out seems last long time between charges number fliers build unit flight box has ammeter can test plug usually have two 1-volt cells wet cell built types units Tatone makes nifty hand-on con nector eliminates wires called Pocket Booster Prather makes starting battery com bination called has NiCad battery plug tester battery tester together about $2995 other units available should check local hobby store catalogs Another item getting fuel gallon can fuel tank will see guys using old fashioned fuel bulb various types plastic fuel bottles squeeze bulbs ete Some use manual feed fuel pumps attached cans few use electric fuel pumps Just remember some synthetic fuels will attack parts plastic fuel pumps reduce putty Lastly number fliers use tachometer set rpms engines ground trusting ears partners tojudge engine speed Bob Baron swears Heathkit tach just Gene Martine likes Royal Pro-Tach uses Under dlffering weather humidlty condltions FUN SCALE SE RI EScf , ANG 40 new super quiet K&B 40 R/C muffler requirao no exhaust plugs fittings adsgstcrn Muffler uneolsined fit exhaust stack end cover exposed holes Just bolt on.thatn iti Will reduce noise 10 12 dacbeln little no tom pmn u Noiw cancelled interposing noufld wanes Radl cal tree flow enpennion dumber angled blow enbeust emey front lusalegs us amy attach sHag pronision pressure fitting Also snellinle lot ENYA 20 35 40 48 06 MAX 30 35 40 SUPER TIORE 021 35 46 Add 8100 extra eaa engines apacify type MountIng strep ncraw included Dealers Distributors InvitedOnly catalogNo3061395 calNo 35455 Shunt Beam 115600 catr4o 30453 Long Beam 2.S0O Add $1 25 postage handling CA residentsadd 6% tax ga a cast Aluminum K & 5 40 RIC Engine Mounts 01 006 8pp00 JuSt th aug n thu mount thu probably good idea use tachometer suggest obtain copies available catalogs includlng used Radlo Control take time go through carefully information stunt orPAMPA con tact Wynn Paul 1640 Maywick Drivn Lexing ton KY 40504 Arado 68-F/McClure continued page 45 plant first devoted construction furniture small boats although Stinnes intended again build aircraft time acquisition Thereafter 1924 very competent aircraft designer kg Walter Rethel resigned Fokker Netherlands joined Stinnes Wamemtlde Apparently name Arado officially adopted until 1925 Rethel designated Chief Engineer point great interest note same Walter Rethel years later Chief Engineer Bayerische Flugzeugwerke AG later being Messerschmitt AG great responsibility creation historic Bf 109 produced fighter time relation Arado initial location Warne mude may recalled first Heinkel plant also located 1929 Arado design bureau under Rethel produced several machines among noteworthy SDi SD2 SD-3 fighter biplanes SSD1 float fighter fighter designs prototypes led creation Arado Ar 64 immediate predecessor first Luftwaffe December1979 123 Quiet Power Taone Makes Easy
Edition: Model Aviation - 1979/12
Page Numbers: 37, 122, 123
Edition: Model Aviation - 1979/12
Page Numbers: 37, 122, 123
I I b THE SUBJECT next few months engine speed control scale Carrier classes have talked about different speed control systems past conventional suction systems RC carburetors pen-bladder pressure systems large-bore modified carbs idle mixture control Suction systems offer competitive performance least amount difficulty few extra mph available pressurized fuel system worth extra effort involved past have described fuel system unless have used myself least test stand am making exception next few columns will discuss two pressure systems 1 on-off pressure 2 fuel meter Although have used fuel meter Carrier am going describe since very popular system used top-notch competitors Both systems rely exhaust restrictor primary means speed control use exhaust restrictor throttles model airplanes its origin Bob Smurthwaite G-S Products long before intake throttles devel oped reasonable degree Bob used exhaust restrictor normal suction venturi principle used on-off pressure system Before describe complete systems however want describe making fitting exhaust restrictor since component common both systems exhaust restrictor will describing steel slide valve rides slot cut engines exhaust stack rotary butterfly valves common RC engines before mufflers became popular fit tightly enough used effective throttle pre-Nats issue High-Low-Landing Newsletter CL Navy Carrier Society good photo article Harry Higley describing make install exhaust slide have some different materials sources Harry uses will mention summarize general method used Harry others install own slides Harry uses X0025 bandsaw blade making slotting saw slide slotting saw can also made hacksaw blade X-Acto saw blade #27 #15 * 15 ideal since narrow enough fit inside exhaust stack having cut down saws except few very old X-Acto blades have teeth set saw cut wider thickness blade itself use sides teeth must hammered and/or filed teeth saw wide thickness saw blade ne exnaust stack siotted making four seal properly have made cuts cuts first two cuts vertical cuts aug young foolish can narrow ends exhaust stack cuts very easily ruin case way Aug like just deep enough expose interior shown can made steel either screwed stack saw can inserted together assembled cyanoacrylate adinside exhaust stackCut 1 diagram hesive base jig held firmly against next two cuts Cut 2 made saw face exhaust stack jig provides inserted through first two cuts length accurate guide initial cuts exhaust stack last cuts provide slide itself should made steel groove slide ride should no Harry Higley uses bandsaw blades teeth deeper half wall thickness exhaust removed Hacksaw blades too brittle use stack extreme care should taken though price right prefer use cuts uniform depth along stack feeler gage stock available auto parts stores first cuts ends exhaust stack 12-in length adequate three four must parallel slide will either bind Continued page 122 December1979 37 exhaust slide tuel meter installation Harry Higley typical throttle systems used modelers Class II exhaust slide controls engine speed fuel meter controls fuel flow pressurized tank Drawing shows make exhaust slide see text tight fit important good operation jig slotting saw almost neces sityif dont feel enthusiastic about springing new crankcase planform alignment Install large nylon control horn Kwik Link wire pushrod guide omit pushrod guide because aerodynamic force stab during outside maneuvers will cause pushrod bowing less effective control outside maneuvers Slow Combat version uses same wing has standard balsa fuselage standard type nose Two pushrod guides required along long fuselage plane should balance motor prop installed 185% chord 1 -in rear leading edge bladder tube placed exactly along line prevent change center gravity fuel runs out center gravity second hole top control horn good starting point Fast Combat version should weigh 8 9 oz engine FAT version 8 8 oz Select slightly lighter wood FAT version Power Fast Slow Rongeurs MK III Fox Combat Special 25% nitro head clearance set 019 Power FAT version favorite high perforniance 151 like Fox 15 Take test flight check warps thrust misalignment usually minimal care taken during construction Rongeur will provide durable cheap easy build easy repair combat plane stable enough fly eyes-off yet tight turning enough competition hundreds others too numerous mention Joes impressive model faithfully duplicates unique features kind aircraft scored 258 static points tops Senior class Past wins include five first places second including first Junior Preci sion Scale 75 77 Nats B-25 scratch-built ves wingspan 25 5/16 inches overall length 21 inches According Joe model weighs pound half two mufflerized Cox 049 Space Hoppers flies 45 feet line flies either engine controlled Stanzel Stunt Master Monoline control unit entire model made balsa solid wings tail rudders hollowed-out fuselage used Aero-Gloss finish entire plane blue-tone white blue nacelle areas Dale adds interesting story relating Joes B-25 5X4 3-bladed props necessary extend flying time miscalculated tank sizes would fly about eight laps 50X016 line 5X3 props So slowed engine down 4-in pitch cut flying line down 45 feet runs about 12 14 laps both engines configuration Inclosing Im thrilled able feature up-close look two young competitors outstanding models because believe characteristic CL Scale modelings greatest strengths continued partici pation Junior Senior age modelers CL Scale degree seen other mode Scale flying Nationals have attended Junior Senior age contestants accounted between 40 50 percent total entries Its refreshing contrast trends noticeable other AMA events Scale Model Research Photos name service recently started Dale Willoughby make quality color photo packs unique fullscale aircraft available scale modelers Dale travels lot whenever possible photographs outstanding home-builts restored antiques interesting airplanes types encoun ters airports fly-ins museums result ing photo packs offers contain numerous views same subject aircraft crucial angies photo list #2 have just received describes packs 57 different aircraft including Wittman Tailwind Flying Flea Lockheed Orion P-26 Peashooter PT-22 Grumman Duck P-38s P-S P-40E on packs vary $550 $1750 per set contain 9 33 top quality color photos prints full 3X5A size 3AX5 means get full prints everything standard 35-mm negatives no spinners chopped off missing wing tips ordinarily free copy latest list send stamped self-addressed long envelope Dale Willoughby Scale Model Research Photos PO Box 675 Orange CA 92666 Now flying season winding down hope youll have time send some photos drawings ideas comments use column need contribution keep space interesting informative Dont forget ModelAviation will pay $5 item printed Mike Gretz Box 162 Montezuma L4 50171 CL Navy Carrier/Perry continued oage 37 slides feeler gage stock has advantage being available thickness desired use stock 0025 0030 depending thickness saw used slide very easily shaped using Dremel tool tungsten-carbide bits cut-off wheels cut-off wheel used router attachment excellent way make initial cut reduce slide approximate width desired Final trimming width should done drawing edge slide along file careful keep sides slide paralleL final polishing 320 grit finer paper should allow slide move freely still provide good seal opening slide should least large exhaust ports cylinder Larger betterwithin limits imposed size exhaust stack amount throttle move ment available need keep exhaust slide out back prop taper opening necessary provide manageable 122 Model Aviation GET ORGANIZED CL Scale/Gretz Hee 5 set 4 sia4y tiles hotds 4 yeas ot youi tavoite 8 t magazines continued page 35 4 MAG FILES $495 Send $496 plan $100 postage handling DOM INDUSTRIES PO BOX 388-K DOVER NH 03820 GEE BEE Z DECALS ALL NUMBERS 2in 1 SCALE & LETTERING EXCEPT THOSE OF THE WINGS GRANGER$4 95 POST WILLIAMS t8t PAWNEESTOSET SAN MARCOS CA F0RNA92069 throttle response around idle Future columns will describe fuel meters on-off pressure systems use exhaust slide want wait fuel meter like shown photo available Harry Higley 433 Arquilla Dr Glenwood IL 60425 Richard L Perry 5016 Angelita Ave Day ton OH 45424 CL Aerobatics/Paul continued page 38 outlet plastic handle Richard Byron has cables tested local college said broke around 100 pounds pull very good still some Control Specialties In-flite adjustable handles available although Bob Hunt now working Flying Models high density foam handle has wide spacing very good cable George Aldrich handle designed George after used years good light weight handle cable very strong Georges handles several colors plastic part handle Fox makes steel handle large wooden grip handle has two line spacing positions wooden grip real handful can sanded carved conform hand Bob Baron designed handle has magazines two occasions MAN August 1970 ModelAviation April 1977 adjustable handle basis marketed Gene Martine Custom Master Products Jacksonville Fla handle favorite USA team member Gene Schaffer well several other Eastern fliers Sullivan Products also has plastic handle nine adjustments may fit -- hand want build own handle certain pull-test well before using electrical equipment get everything plain old 1 volt battery two alligator clips using Du-Bro Kwik Gb go-plug connector No DU-KG-147 using awet cell Wet cells usually 2 volts need recharging will blow out weak plug whats sense having weak plug anyway Getting very popular now Fusite GloBee Fireplug Charger costs about $3995 retail has ammeter built rechargeable will show plug flooded bumt out seems last long time between charges number fliers build unit flight box has ammeter can test plug usually have two 1-volt cells wet cell built types units Tatone makes nifty hand-on con nector eliminates wires called Pocket Booster Prather makes starting battery com bination called has NiCad battery plug tester battery tester together about $2995 other units available should check local hobby store catalogs Another item getting fuel gallon can fuel tank will see guys using old fashioned fuel bulb various types plastic fuel bottles squeeze bulbs ete Some use manual feed fuel pumps attached cans few use electric fuel pumps Just remember some synthetic fuels will attack parts plastic fuel pumps reduce putty Lastly number fliers use tachometer set rpms engines ground trusting ears partners tojudge engine speed Bob Baron swears Heathkit tach just Gene Martine likes Royal Pro-Tach uses Under dlffering weather humidlty condltions FUN SCALE SE RI EScf , ANG 40 new super quiet K&B 40 R/C muffler requirao no exhaust plugs fittings adsgstcrn Muffler uneolsined fit exhaust stack end cover exposed holes Just bolt on.thatn iti Will reduce noise 10 12 dacbeln little no tom pmn u Noiw cancelled interposing noufld wanes Radl cal tree flow enpennion dumber angled blow enbeust emey front lusalegs us amy attach sHag pronision pressure fitting Also snellinle lot ENYA 20 35 40 48 06 MAX 30 35 40 SUPER TIORE 021 35 46 Add 8100 extra eaa engines apacify type MountIng strep ncraw included Dealers Distributors InvitedOnly catalogNo3061395 calNo 35455 Shunt Beam 115600 catr4o 30453 Long Beam 2.S0O Add $1 25 postage handling CA residentsadd 6% tax ga a cast Aluminum K & 5 40 RIC Engine Mounts 01 006 8pp00 JuSt th aug n thu mount thu probably good idea use tachometer suggest obtain copies available catalogs includlng used Radlo Control take time go through carefully information stunt orPAMPA con tact Wynn Paul 1640 Maywick Drivn Lexing ton KY 40504 Arado 68-F/McClure continued page 45 plant first devoted construction furniture small boats although Stinnes intended again build aircraft time acquisition Thereafter 1924 very competent aircraft designer kg Walter Rethel resigned Fokker Netherlands joined Stinnes Wamemtlde Apparently name Arado officially adopted until 1925 Rethel designated Chief Engineer point great interest note same Walter Rethel years later Chief Engineer Bayerische Flugzeugwerke AG later being Messerschmitt AG great responsibility creation historic Bf 109 produced fighter time relation Arado initial location Warne mude may recalled first Heinkel plant also located 1929 Arado design bureau under Rethel produced several machines among noteworthy SDi SD2 SD-3 fighter biplanes SSD1 float fighter fighter designs prototypes led creation Arado Ar 64 immediate predecessor first Luftwaffe December1979 123 Quiet Power Taone Makes Easy
Edition: Model Aviation - 1979/12
Page Numbers: 37, 122, 123
I I b THE SUBJECT next few months engine speed control scale Carrier classes have talked about different speed control systems past conventional suction systems RC carburetors pen-bladder pressure systems large-bore modified carbs idle mixture control Suction systems offer competitive performance least amount difficulty few extra mph available pressurized fuel system worth extra effort involved past have described fuel system unless have used myself least test stand am making exception next few columns will discuss two pressure systems 1 on-off pressure 2 fuel meter Although have used fuel meter Carrier am going describe since very popular system used top-notch competitors Both systems rely exhaust restrictor primary means speed control use exhaust restrictor throttles model airplanes its origin Bob Smurthwaite G-S Products long before intake throttles devel oped reasonable degree Bob used exhaust restrictor normal suction venturi principle used on-off pressure system Before describe complete systems however want describe making fitting exhaust restrictor since component common both systems exhaust restrictor will describing steel slide valve rides slot cut engines exhaust stack rotary butterfly valves common RC engines before mufflers became popular fit tightly enough used effective throttle pre-Nats issue High-Low-Landing Newsletter CL Navy Carrier Society good photo article Harry Higley describing make install exhaust slide have some different materials sources Harry uses will mention summarize general method used Harry others install own slides Harry uses X0025 bandsaw blade making slotting saw slide slotting saw can also made hacksaw blade X-Acto saw blade #27 #15 * 15 ideal since narrow enough fit inside exhaust stack having cut down saws except few very old X-Acto blades have teeth set saw cut wider thickness blade itself use sides teeth must hammered and/or filed teeth saw wide thickness saw blade ne exnaust stack siotted making four seal properly have made cuts cuts first two cuts vertical cuts aug young foolish can narrow ends exhaust stack cuts very easily ruin case way Aug like just deep enough expose interior shown can made steel either screwed stack saw can inserted together assembled cyanoacrylate adinside exhaust stackCut 1 diagram hesive base jig held firmly against next two cuts Cut 2 made saw face exhaust stack jig provides inserted through first two cuts length accurate guide initial cuts exhaust stack last cuts provide slide itself should made steel groove slide ride should no Harry Higley uses bandsaw blades teeth deeper half wall thickness exhaust removed Hacksaw blades too brittle use stack extreme care should taken though price right prefer use cuts uniform depth along stack feeler gage stock available auto parts stores first cuts ends exhaust stack 12-in length adequate three four must parallel slide will either bind Continued page 122 December1979 37 exhaust slide tuel meter installation Harry Higley typical throttle systems used modelers Class II exhaust slide controls engine speed fuel meter controls fuel flow pressurized tank Drawing shows make exhaust slide see text tight fit important good operation jig slotting saw almost neces sityif dont feel enthusiastic about springing new crankcase planform alignment Install large nylon control horn Kwik Link wire pushrod guide omit pushrod guide because aerodynamic force stab during outside maneuvers will cause pushrod bowing less effective control outside maneuvers Slow Combat version uses same wing has standard balsa fuselage standard type nose Two pushrod guides required along long fuselage plane should balance motor prop installed 185% chord 1 -in rear leading edge bladder tube placed exactly along line prevent change center gravity fuel runs out center gravity second hole top control horn good starting point Fast Combat version should weigh 8 9 oz engine FAT version 8 8 oz Select slightly lighter wood FAT version Power Fast Slow Rongeurs MK III Fox Combat Special 25% nitro head clearance set 019 Power FAT version favorite high perforniance 151 like Fox 15 Take test flight check warps thrust misalignment usually minimal care taken during construction Rongeur will provide durable cheap easy build easy repair combat plane stable enough fly eyes-off yet tight turning enough competition hundreds others too numerous mention Joes impressive model faithfully duplicates unique features kind aircraft scored 258 static points tops Senior class Past wins include five first places second including first Junior Preci sion Scale 75 77 Nats B-25 scratch-built ves wingspan 25 5/16 inches overall length 21 inches According Joe model weighs pound half two mufflerized Cox 049 Space Hoppers flies 45 feet line flies either engine controlled Stanzel Stunt Master Monoline control unit entire model made balsa solid wings tail rudders hollowed-out fuselage used Aero-Gloss finish entire plane blue-tone white blue nacelle areas Dale adds interesting story relating Joes B-25 5X4 3-bladed props necessary extend flying time miscalculated tank sizes would fly about eight laps 50X016 line 5X3 props So slowed engine down 4-in pitch cut flying line down 45 feet runs about 12 14 laps both engines configuration Inclosing Im thrilled able feature up-close look two young competitors outstanding models because believe characteristic CL Scale modelings greatest strengths continued partici pation Junior Senior age modelers CL Scale degree seen other mode Scale flying Nationals have attended Junior Senior age contestants accounted between 40 50 percent total entries Its refreshing contrast trends noticeable other AMA events Scale Model Research Photos name service recently started Dale Willoughby make quality color photo packs unique fullscale aircraft available scale modelers Dale travels lot whenever possible photographs outstanding home-builts restored antiques interesting airplanes types encoun ters airports fly-ins museums result ing photo packs offers contain numerous views same subject aircraft crucial angies photo list #2 have just received describes packs 57 different aircraft including Wittman Tailwind Flying Flea Lockheed Orion P-26 Peashooter PT-22 Grumman Duck P-38s P-S P-40E on packs vary $550 $1750 per set contain 9 33 top quality color photos prints full 3X5A size 3AX5 means get full prints everything standard 35-mm negatives no spinners chopped off missing wing tips ordinarily free copy latest list send stamped self-addressed long envelope Dale Willoughby Scale Model Research Photos PO Box 675 Orange CA 92666 Now flying season winding down hope youll have time send some photos drawings ideas comments use column need contribution keep space interesting informative Dont forget ModelAviation will pay $5 item printed Mike Gretz Box 162 Montezuma L4 50171 CL Navy Carrier/Perry continued oage 37 slides feeler gage stock has advantage being available thickness desired use stock 0025 0030 depending thickness saw used slide very easily shaped using Dremel tool tungsten-carbide bits cut-off wheels cut-off wheel used router attachment excellent way make initial cut reduce slide approximate width desired Final trimming width should done drawing edge slide along file careful keep sides slide paralleL final polishing 320 grit finer paper should allow slide move freely still provide good seal opening slide should least large exhaust ports cylinder Larger betterwithin limits imposed size exhaust stack amount throttle move ment available need keep exhaust slide out back prop taper opening necessary provide manageable 122 Model Aviation GET ORGANIZED CL Scale/Gretz Hee 5 set 4 sia4y tiles hotds 4 yeas ot youi tavoite 8 t magazines continued page 35 4 MAG FILES $495 Send $496 plan $100 postage handling DOM INDUSTRIES PO BOX 388-K DOVER NH 03820 GEE BEE Z DECALS ALL NUMBERS 2in 1 SCALE & LETTERING EXCEPT THOSE OF THE WINGS GRANGER$4 95 POST WILLIAMS t8t PAWNEESTOSET SAN MARCOS CA F0RNA92069 throttle response around idle Future columns will describe fuel meters on-off pressure systems use exhaust slide want wait fuel meter like shown photo available Harry Higley 433 Arquilla Dr Glenwood IL 60425 Richard L Perry 5016 Angelita Ave Day ton OH 45424 CL Aerobatics/Paul continued page 38 outlet plastic handle Richard Byron has cables tested local college said broke around 100 pounds pull very good still some Control Specialties In-flite adjustable handles available although Bob Hunt now working Flying Models high density foam handle has wide spacing very good cable George Aldrich handle designed George after used years good light weight handle cable very strong Georges handles several colors plastic part handle Fox makes steel handle large wooden grip handle has two line spacing positions wooden grip real handful can sanded carved conform hand Bob Baron designed handle has magazines two occasions MAN August 1970 ModelAviation April 1977 adjustable handle basis marketed Gene Martine Custom Master Products Jacksonville Fla handle favorite USA team member Gene Schaffer well several other Eastern fliers Sullivan Products also has plastic handle nine adjustments may fit -- hand want build own handle certain pull-test well before using electrical equipment get everything plain old 1 volt battery two alligator clips using Du-Bro Kwik Gb go-plug connector No DU-KG-147 using awet cell Wet cells usually 2 volts need recharging will blow out weak plug whats sense having weak plug anyway Getting very popular now Fusite GloBee Fireplug Charger costs about $3995 retail has ammeter built rechargeable will show plug flooded bumt out seems last long time between charges number fliers build unit flight box has ammeter can test plug usually have two 1-volt cells wet cell built types units Tatone makes nifty hand-on con nector eliminates wires called Pocket Booster Prather makes starting battery com bination called has NiCad battery plug tester battery tester together about $2995 other units available should check local hobby store catalogs Another item getting fuel gallon can fuel tank will see guys using old fashioned fuel bulb various types plastic fuel bottles squeeze bulbs ete Some use manual feed fuel pumps attached cans few use electric fuel pumps Just remember some synthetic fuels will attack parts plastic fuel pumps reduce putty Lastly number fliers use tachometer set rpms engines ground trusting ears partners tojudge engine speed Bob Baron swears Heathkit tach just Gene Martine likes Royal Pro-Tach uses Under dlffering weather humidlty condltions FUN SCALE SE RI EScf , ANG 40 new super quiet K&B 40 R/C muffler requirao no exhaust plugs fittings adsgstcrn Muffler uneolsined fit exhaust stack end cover exposed holes Just bolt on.thatn iti Will reduce noise 10 12 dacbeln little no tom pmn u Noiw cancelled interposing noufld wanes Radl cal tree flow enpennion dumber angled blow enbeust emey front lusalegs us amy attach sHag pronision pressure fitting Also snellinle lot ENYA 20 35 40 48 06 MAX 30 35 40 SUPER TIORE 021 35 46 Add 8100 extra eaa engines apacify type MountIng strep ncraw included Dealers Distributors InvitedOnly catalogNo3061395 calNo 35455 Shunt Beam 115600 catr4o 30453 Long Beam 2.S0O Add $1 25 postage handling CA residentsadd 6% tax ga a cast Aluminum K & 5 40 RIC Engine Mounts 01 006 8pp00 JuSt th aug n thu mount thu probably good idea use tachometer suggest obtain copies available catalogs includlng used Radlo Control take time go through carefully information stunt orPAMPA con tact Wynn Paul 1640 Maywick Drivn Lexing ton KY 40504 Arado 68-F/McClure continued page 45 plant first devoted construction furniture small boats although Stinnes intended again build aircraft time acquisition Thereafter 1924 very competent aircraft designer kg Walter Rethel resigned Fokker Netherlands joined Stinnes Wamemtlde Apparently name Arado officially adopted until 1925 Rethel designated Chief Engineer point great interest note same Walter Rethel years later Chief Engineer Bayerische Flugzeugwerke AG later being Messerschmitt AG great responsibility creation historic Bf 109 produced fighter time relation Arado initial location Warne mude may recalled first Heinkel plant also located 1929 Arado design bureau under Rethel produced several machines among noteworthy SDi SD2 SD-3 fighter biplanes SSD1 float fighter fighter designs prototypes led creation Arado Ar 64 immediate predecessor first Luftwaffe December1979 123 Quiet Power Taone Makes Easy
