"SOLD OUT" Cox .020 silencers -- currently

sosam117 Sat Mar 02, 2024 3:54 pm

Cox .020 silencers with gasket/shims.
They are designed similar to the Cox car silencer where the cylinder screws down onto the silencer and tightens down on the crankcase.

Top of silencer

"SOLD OUT" Cox .020 silencers -- currently 005a_m11

Bottom of silencer

"SOLD OUT" Cox .020 silencers -- currently 006_mu11

"SOLD OUT" Cox .020 silencers -- currently 007_mu11

"SOLD OUT" Cox .020 silencers -- currently 008_mu10

"SOLD OUT" Cox .020 silencers -- currently 020_on11

Installation instructions

Please check the cylinder dimensions:

The late model Tee Dee.020 and PeeWee.020. cylinder dimensions.
The dimensions and shape of the bottom of the cylinder is .418 inch dia. (aprox. 10.62~10.63mm)

The early Pee Wee cylinder dimension is .438 inch dia. (aprox. 11.11mm)

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. Don't overdo it now! you want a snug /slip fit.

I have included a drawing of the different dimensions of the Cox 020 sleeves.

Included with the silencer are two different thickness size shims (.005 / .008) (0.13mm/ 0.20mm) 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 to the bottom 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

sosam117 Sat Mar 02, 2024 7:41 pm

One silencer sold to 1/2A Nut

Thanks, Brad!

Mike Mac

1/2A Nut Sat Mar 02, 2024 8:12 pm

Do you have a vid running the silencer or RC carbs?

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sosam117 Sat Mar 02, 2024 8:49 pm

Sorry I do not.
I'm not much of a tech guy.
No smart phone, and not on any of the media stuff ("X", twitter, Facebook etc.)
No GoPro either.
I still use a paper map to find and get directions.
I only have a computer because of medical stuff (appointments, results, and things you no longer can do "in person"),
My pension and Medicare and doing Federal taxes ( which I need to start on? --Turbo Tax --)

1/2A Nut wrote:Do you have a vid running the silencer or RC carbs?

1/2A Nut Sat Mar 02, 2024 9:15 pm

10/4 Mike,

Look forward to testing the parts, happy to participate in the 1/2A fun!

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sosam117 Sun Mar 10, 2024 6:51 pm

Only have one .020 silencer left.

1/2A Nut Thu May 02, 2024 1:00 am

I fitted Mike's manifold / header to a Bob Mattes Modified FF TD .020!

Also using one of Bernie's aluminum carb bodies with the spring post.
G-Mark RC carb / Kamtechnik backplate / static: 3.6x4.5N @ 30,604 rpm
Per calc: 130.4 mph prop pitch speed / 7oz thrust!

"SOLD OUT" Cox .020 silencers -- currently Resize32

"SOLD OUT" Cox .020 silencers -- currently Resize30

"SOLD OUT" Cox .020 silencers -- currently Resize31

MauricioB Thu May 02, 2024 1:53 am

These are very good data friend!....thanks for sharing experiences!

GallopingGhostler Thu May 02, 2024 5:12 am

1/2A Nut wrote:I fitted Mike's manifold / header to a Bob Mattes Modified FF TD .020! Also using one of Bernie's aluminum carb bodies with the spring post. G-Mark RC carb / Kamtechnik backplate / static: 3.6x4.5N @ 30,604 rpm
Per calc: 130.4 mph prop pitch speed / 7oz thrust!

Looks like you have a mighty potential Cox Engine of the Month Contest candidate! Very Happy