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Cox Engine of The Month
August-2024
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
Sold out Cox .049 silencers for sale
Page 1 of 1
Sold out Cox .049 silencers for sale
These silencers are similar in design to the Cox .020 mufflers but slightly larger to accommodate the Cox .049 engine
Top of silencer
![Sold out Cox .049 silencers for sale 005a_m11](https://i.servimg.com/u/f13/20/19/65/06/005a_m11.jpg)
Bottom of silencer
![Sold out Cox .049 silencers for sale 006_mu11](https://i.servimg.com/u/f13/20/19/65/06/006_mu11.jpg)
![Sold out Cox .049 silencers for sale 007_mu11](https://i.servimg.com/u/f13/20/19/65/06/007_mu11.jpg)
![Sold out Cox .049 silencers for sale 008_mu10](https://i.servimg.com/u/f13/20/19/65/06/008_mu10.jpg)
![Sold out Cox .049 silencers for sale 04905114](https://i.servimg.com/u/f13/20/19/65/06/04905114.jpg)
Installation instructions
Please check the cylinder dimensions:
As the cylinder sleeve sizes vary slightly you might have to adjust the fit?
The parts that interfere (i.D.) with the engine cylinder will need to be shaped. (enlarged?)
Using a slightly undersized wooden dowel and some 220-grit sandpaper wrapped around the dowel to carefully enlarger the hole for the cylinder sleeve by twisting the dowel/sandpaper in the hole to enlarge it. Don't overdo it now! you want a snug /slip fit.
Included with the silencer are two different thickness size shims (.008" / .012") (0.2mm/ 0.3mm) to give the silencer a tight enough fit when the cylinder is tightened down and the silencer is snug enough to not move. If it does, you'll need to add one of the shims on the bottom side of the silencer.
One more FYI (if necessary) -- use a small amount of Permatex (non-hardening) gasket sealant on the upper and lower faces of the silencer to get a really good seal.
The exhaust tubing is 5mm I.D. diameter.
Thanks,
sosam117
Mike Mac
Top of silencer
![Sold out Cox .049 silencers for sale 005a_m11](https://i.servimg.com/u/f13/20/19/65/06/005a_m11.jpg)
Bottom of silencer
![Sold out Cox .049 silencers for sale 006_mu11](https://i.servimg.com/u/f13/20/19/65/06/006_mu11.jpg)
![Sold out Cox .049 silencers for sale 007_mu11](https://i.servimg.com/u/f13/20/19/65/06/007_mu11.jpg)
![Sold out Cox .049 silencers for sale 008_mu10](https://i.servimg.com/u/f13/20/19/65/06/008_mu10.jpg)
![Sold out Cox .049 silencers for sale 04905114](https://i.servimg.com/u/f13/20/19/65/06/04905114.jpg)
Installation instructions
Please check the cylinder dimensions:
As the cylinder sleeve sizes vary slightly you might have to adjust the fit?
The parts that interfere (i.D.) with the engine cylinder will need to be shaped. (enlarged?)
Using a slightly undersized wooden dowel and some 220-grit sandpaper wrapped around the dowel to carefully enlarger the hole for the cylinder sleeve by twisting the dowel/sandpaper in the hole to enlarge it. Don't overdo it now! you want a snug /slip fit.
Included with the silencer are two different thickness size shims (.008" / .012") (0.2mm/ 0.3mm) to give the silencer a tight enough fit when the cylinder is tightened down and the silencer is snug enough to not move. If it does, you'll need to add one of the shims on the bottom side of the silencer.
One more FYI (if necessary) -- use a small amount of Permatex (non-hardening) gasket sealant on the upper and lower faces of the silencer to get a really good seal.
The exhaust tubing is 5mm I.D. diameter.
Thanks,
sosam117
Mike Mac
Last edited by sosam117 on Fri May 10, 2024 6:40 pm; edited 5 times in total (Reason for editing : Sold out)
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
Re: Sold out Cox .049 silencers for sale
I bought 1 to test, the 5mm ID header should help the engine breath.
Thank you Mike!
![Thumbs Up](/users/3015/29/34/60/smiles/1541798026.gif)
Thank you Mike!
![Small Cox Logo](/users/3015/29/34/60/smiles/7356.png)
![Thumbs Up](/users/3015/29/34/60/smiles/1541798026.gif)
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: Sold out Cox .049 silencers for sale
roddie wrote:Hi Mike, What's the approx. weight of the silencer?
Roddie,
The .020 silencer is 1.3 grams and the .049 is 2.4 grams
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
davidll1984- Diamond Member
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Join date : 2020-02-12
Age : 39
Location : shawinigan
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: Sold out Cox .049 silencers for sale
I definitely would like one. PM sent to Sosam 117
Mark Green
Mark Green
Greenman38633- Gold Member
- Posts : 150
Join date : 2024-02-05
Re: Sold out Cox .049 silencers for sale
Greenman38633 wrote:I definitely would like one. PM sent to Sosam117
Mark Green
O.K. Mark!
Sent you a PM on payment.
Thanks,
Mike Mac
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: Sold out Cox .049 silencers for sale
Brad, I enjoy reading about your ventures, because they have a touch of class and on the high performing end, never a dull moment. ![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
I suppose in a pinch one could substitute a couple wraps of 16 gauge bare soft iron or copper wire to fill the gap, then carefully twist (say, 14 - 16 turns per inch), clip off to a 3/8th inch pigtail, nicely curl into an out-of-the way loop with some needle nose pliers, so it doesn't poke a finger.
Mighty nice professional finished work, by the way.![Thumbs Up](/users/3015/29/34/60/smiles/1541798026.gif)
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
I suppose in a pinch one could substitute a couple wraps of 16 gauge bare soft iron or copper wire to fill the gap, then carefully twist (say, 14 - 16 turns per inch), clip off to a 3/8th inch pigtail, nicely curl into an out-of-the way loop with some needle nose pliers, so it doesn't poke a finger.
![Huh...](/users/3015/29/34/60/smiles/3929217648.gif)
Mighty nice professional finished work, by the way.
![Thumbs Up](/users/3015/29/34/60/smiles/1541798026.gif)
GallopingGhostler- Top Poster
Posts : 5536
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Sold out Cox .049 silencers for sale
1/2A Nut wrote:Hey Mike, hope things are all going well.
I have run into a need for more shims for the Killer Bee .049.
Looks like 2 more sets to hold the manifold up as it sits down on the
crank case top without the shims. Guessing on the shims at 1.4mm
may need 3 x .3 +2 x.2 - 1.3mm to snug up or 5 x .3 -1.5mm![]()
That gap is/was for the spring starter?
The spring starter measures about 1.0mm in width
PM me and I'll make up some shims for you.
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
1/2A Nut- Top Poster
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Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: Sold out Cox .049 silencers for sale
I have the shims punched out.
Had a little time to do it as we had a storm go through Plainfield (Chicagoland) and lost power for a couple of hours.
So, took the time to get the punch set out and the shim stock and "Get r Done!"
I punched out three shims for 1/2A Nut.
![Sold out Cox .049 silencers for sale Img_0337](https://i.servimg.com/u/f13/20/19/65/06/img_0337.jpg)
One is 0.62mm (about .025")
![Sold out Cox .049 silencers for sale Img_0338](https://i.servimg.com/u/f13/20/19/65/06/img_0338.jpg)
The aluminum spacer is 0.21 (about .008")
![Sold out Cox .049 silencers for sale Img_0339](https://i.servimg.com/u/f13/20/19/65/06/img_0339.jpg)
And the last is another one at 0.63m (about .025")
![Sold out Cox .049 silencers for sale Img_0340](https://i.servimg.com/u/f13/20/19/65/06/img_0340.jpg)
For a total of about 1.45mm (.057")
![Sold out Cox .049 silencers for sale Img_0341](https://i.servimg.com/u/f13/20/19/65/06/img_0341.jpg)
My punch set only goes up to .020" (0.50mm) ---- so it was a little tight to get the .025 shim stock into the punch holder.
Had a little time to do it as we had a storm go through Plainfield (Chicagoland) and lost power for a couple of hours.
So, took the time to get the punch set out and the shim stock and "Get r Done!"
I punched out three shims for 1/2A Nut.
![Sold out Cox .049 silencers for sale Img_0337](https://i.servimg.com/u/f13/20/19/65/06/img_0337.jpg)
One is 0.62mm (about .025")
![Sold out Cox .049 silencers for sale Img_0338](https://i.servimg.com/u/f13/20/19/65/06/img_0338.jpg)
The aluminum spacer is 0.21 (about .008")
![Sold out Cox .049 silencers for sale Img_0339](https://i.servimg.com/u/f13/20/19/65/06/img_0339.jpg)
And the last is another one at 0.63m (about .025")
![Sold out Cox .049 silencers for sale Img_0340](https://i.servimg.com/u/f13/20/19/65/06/img_0340.jpg)
For a total of about 1.45mm (.057")
![Sold out Cox .049 silencers for sale Img_0341](https://i.servimg.com/u/f13/20/19/65/06/img_0341.jpg)
My punch set only goes up to .020" (0.50mm) ---- so it was a little tight to get the .025 shim stock into the punch holder.
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: Sold out Cox .049 silencers for sale
I messed up on that one?
It is a little short for using without the spring starter (manifold alone --- should measure 11.35mm) and it is just a little too long for the spring starter (spring starter measures 1.2mm so the manifold overall length should be about 10.15mm)
So, 1/2A Nut (since you measured the overall length) and it reads 11.05mm the one 0.21mm and one of the other shims should cover the length?
And you have the other "2" shims at 0.62mm which you could sand down to a thinner thickness (if need be?)
Mike
Actual overall length should be for the 049 manifold:
![Sold out Cox .049 silencers for sale Img_0343](https://i.servimg.com/u/f13/20/19/65/06/img_0343.jpg)
It is a little short for using without the spring starter (manifold alone --- should measure 11.35mm) and it is just a little too long for the spring starter (spring starter measures 1.2mm so the manifold overall length should be about 10.15mm)
So, 1/2A Nut (since you measured the overall length) and it reads 11.05mm the one 0.21mm and one of the other shims should cover the length?
And you have the other "2" shims at 0.62mm which you could sand down to a thinner thickness (if need be?)
Mike
Actual overall length should be for the 049 manifold:
![Sold out Cox .049 silencers for sale Img_0343](https://i.servimg.com/u/f13/20/19/65/06/img_0343.jpg)
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
sosam117- Diamond Member
- Posts : 1321
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois
![-](https://2img.net/i/empty.gif)
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