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Cox #6 piston/ cylinder Empty Cox #6 piston/ cylinder

Post  dankar04 Sun Aug 21, 2011 2:04 pm

What is a #6 it is in a Cox TD .051 case. I have not taken it apart but have not seen a #6. I know the #4 is a TD .049. Just cleaned four TD's and had enough for today. Engine has a Kirn Kraft NVA. Thank you,Dan
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  EXModelEngines Sun Aug 21, 2011 2:22 pm

dankar04 wrote:What is a #6 it is in a Cox TD .051 case. I have not taken it apart but have not seen a #6. I know the #4 is a TD .049. Just cleaned four TD's and had enough for today. Engine has a Kirn Kraft NVA. Thank you,Dan

I just pulled a refurbished #6 cylinder. This one is a thin-walled, early one with dual bypass and NO sub induction. .049 pistons fit.

Keep in mind Cox changed up the styles over the years. Usually the dual bypass and No sub induction will be the same regardless, but the outside shape may be a little different depending upon the year.

Matt
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  Admin Sun Aug 21, 2011 2:26 pm

I have a cylinder chart here if it will help. https://sites.google.com/site/coxenginecollection/choosing-a-cylinder
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Cox #6 piston/ cylinder Empty .049-.051

Post  dankar04 Sun Aug 21, 2011 2:32 pm

Is this a TD piston and cylinder or something like a Black Widow that someone changed out??
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  Admin Sun Aug 21, 2011 2:38 pm

They were first used on the QZ and then on the QRC.
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  EXModelEngines Sun Aug 21, 2011 3:21 pm

Cox #6 piston/ cylinder Img_2511

A quick pic of the one I am talking about. Sort of hard to see the '6' but it is there.

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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  Admin Sun Aug 21, 2011 5:52 pm

EXModelEngines wrote:Cox #6 piston/ cylinder Img_2511

A quick pic of the one I am talking about. Sort of hard to see the '6' but it is there.

Matt

That one IS off a QZ (it has the old thin design and the top fin milling so it can be tightened and or removed with a muffler on it)
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  nitroairplane Sun Aug 21, 2011 5:57 pm

Two of my pee wee .020s came with a cylinder like that but smaller does the mean they originally had mufflers?


Last edited by nitroairplane on Sun Aug 21, 2011 6:08 pm; edited 1 time in total
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  Admin Sun Aug 21, 2011 6:01 pm

nitroairplane wrote:Twobof my pee wee .020s came with a cylinder like that but smaller does the mean they originally had mufflers?

no, the thin design was a old design. I don't recall ever seeing a .020 come with a muffler. I just know the #6 cylinder, thin wall design and the top fin milling was a cylinder they used on the QZ
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  nitroairplane Sun Aug 21, 2011 6:11 pm

Admin wrote:
nitroairplane wrote:Twobof my pee wee .020s came with a cylinder like that but smaller does the mean they originally had mufflers?

no, the thin design was a old design. I don't recall ever seeing a .020 come with a muffler. I just know the #6 cylinder, thin wall design and the top fin milling was a cylinder they used on the QZ
Ok maybe both the engine came with throttle rings.
Sorry for my spelling i think I'm dislexic and its hard to type on an iPhone when you have the fingers of an engine guy glow fuel makes one skin so hard.
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  GermanBeez Mon Aug 22, 2011 2:09 am

Admin wrote:
nitroairplane wrote:Twobof my pee wee .020s came with a cylinder like that but smaller does the mean they originally had mufflers?

no, the thin design was a old design. I don't recall ever seeing a .020 come with a muffler. I just know the #6 cylinder, thin wall design and the top fin milling was a cylinder they used on the QZ
there was a pee wee with a throttle ring made, actually. it was probably made in pretty limited numbers in
the 90s', i haven't seen any on ebay for ages. they basically use the same type of throttle ring used in medallion
r/c's, but smaller of course.
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  nitroairplane Mon Aug 22, 2011 5:00 am

GermanBeez wrote:
Admin wrote:
nitroairplane wrote:Twobof my pee wee .020s came with a cylinder like that but smaller does the mean they originally had mufflers?

no, the thin design was a old design. I don't recall ever seeing a .020 come with a muffler. I just know the #6 cylinder, thin wall design and the top fin milling was a cylinder they used on the QZ
there was a pee wee with a throttle ring made, actually. it was probably made in pretty limited numbers in
the 90s', i haven't seen any on ebay for ages. they basically use the same type of throttle ring used in medallion
r/c's, but smaller of course.
Yea the ting I have on my tee dee .020 came on a pee wee.
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Cox #6 piston/ cylinder Empty Re: Cox #6 piston/ cylinder

Post  GermanBeez Mon Aug 22, 2011 5:53 am

that's right.
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Cox #6 piston/ cylinder Empty .049/.051

Post  dankar04 Tue Aug 23, 2011 1:03 am

OK,
Checked listing on cylinder #'s . #4 TD .049/ #5 TD .051. #6 QZ/QRC. Just found another baggie with a .049/ and nice .051 TD plus a decent Holland hornet .051. Man I like finding a surprise.
Dan Flying
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