cox 049 low speed
03-19-2006, 09:50 PM
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cox 049 low speed
hi. im having a problem with a small cox motor. i can start it fine, and it runs fine at high speeds, but when i try to idle it the motor dies. i cant seem to find a low speed needle on the motor. there is a small screw next to the high speed needle, but it doesnt seem to have much of an effect. any advice on how to control the idleing of the motor, or if there even is a low speed needle to adjust? thanks!
03-20-2006, 01:05 AM
#2
RE: cox 049 low speed
You might want to define "low speed". The 1/2A motors idle at rpm's that other engines would consider half throttle or more. This might not be your issue but it's a place to start.
03-20-2006, 01:38 AM
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RE: cox 049 low speed
We are gonna need more info, Cox made very few engines with carbs, and none that I know of with low speed needles ..there was the .05/.09 TD r/c and the queen bee .074 with carbs,,then anything else would have had a throttle sleeve- a peewee .020 or one of the .049 models...Rog
03-20-2006, 09:04 AM
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RE: cox 049 low speed
ORIGINAL: bluesilver30
hi. im having a problem with a small cox motor. i can start it fine, and it runs fine at high speeds, but when i try to idle it the motor dies. i cant seem to find a low speed needle on the motor. there is a small screw next to the high speed needle, but it doesnt seem to have much of an effect. any advice on how to control the idleing of the motor, or if there even is a low speed needle to adjust? thanks!
hi. im having a problem with a small cox motor. i can start it fine, and it runs fine at high speeds, but when i try to idle it the motor dies. i cant seem to find a low speed needle on the motor. there is a small screw next to the high speed needle, but it doesnt seem to have much of an effect. any advice on how to control the idleing of the motor, or if there even is a low speed needle to adjust? thanks!
To get throttle action as designed you will probably have to use a prop larger than you want and fuel that matches the recommended mixture. I think Cox standard fuel is 15% nitro and 18% or 20% castor oil.
I would try recommended prop and fuel, then go from there. As mentioned above, don't expect it to throttle down as much as a larger engine.
You will get more suggestions if you tell us WHICH Cox engine.
George
03-20-2006, 03:37 PM
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RE: cox 049 low speed
hi. im not really sure what kind of motor it is, its just something i found lying around the club. the gist i'm getting is that you can't really idle very well with these small motors? the lowest i can get the engine spinning makes the plane move forward. i guess i could always dead stick the landings. thanks for the input, if you have any more suggestions feel free to let me know.
03-23-2006, 08:16 PM
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RE: cox 049 low speed
Bluesilver30,
I read in one of those guillow kit plans, in the test gliding procedure, they say to lower power you should "plug the venturi with a sliver of wood placed between the inside of the venturi and the forward part of the needle valve body". I never tried it, but Guillow is reasonably reliable. Jus my 2 C
I read in one of those guillow kit plans, in the test gliding procedure, they say to lower power you should "plug the venturi with a sliver of wood placed between the inside of the venturi and the forward part of the needle valve body". I never tried it, but Guillow is reasonably reliable. Jus my 2 C
