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Cox 049 mufflers

Old 10-20-2010, 08:18 AM
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adavis
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Default Cox 049 mufflers

Are there any commercially available mufflers for Cox 049 engines?

Many Thanks,
=Adrian=
Old 10-20-2010, 09:40 AM
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Cox International
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Default RE: Cox 049 mufflers

Adrian,

We had them quoted a couple of times (OEM Cox version)and pricing was too high for the low run we were after (1,000).

We are presently having them quoted by another engine manufacturer and, if pricing pans out, will manufacuture them before the end of the year.

Our target is to have a retail price not exceeding $14.95.

Bernie
Old 10-20-2010, 01:44 PM
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icerinkdad
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Default RE: Cox 049 mufflers

There was someone for awhile that made a silcone rubber muffler that was surprisingly quiet. Not the normal metal idea but who is to say that metal is the best material for this?
Bob
Old 10-23-2010, 12:40 PM
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Default RE: Cox 049 mufflers

I think that was someone on the forum here who made a muffler out of blue rubber connector from a .60 size 'piped' engine... and used steel washers top and bottom... and a drilled hole in the rubber for a 'spout' of brass tubing for the outlet. Search for 'cox muffler' or just for 'muffler'.
Old 10-24-2010, 12:17 PM
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Default RE: Cox 049 mufflers

I'd like to see the kind like the TD R/C came with (same basic style as the one used on the Queen Bee). Easier to have provision for muffler pressure. Speaking of R/C, I plan to soon place an order for one or two of those nifty R/C reedies y'all got. Still not the ideal R/C carb solution, but cost effective, no doubt.
Old 10-24-2010, 12:50 PM
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Default RE: Cox 049 mufflers

Bernie, MECOA has these Tatone mufflers for the Cox engines. They have less power loss than the OEM ones. Mabe you can cut a deal with them and stock these for the time being until the OEM ones get manufactured.

http://mecoa.com/cbtatone/10.htm
Old 10-24-2010, 04:12 PM
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Default RE: Cox 049 mufflers

Yuu:
My experimental throttle, would work as a muffler/exhaust diverter as well.
http://www.rcuniverse.com/forum/m_28...tm.htm#2874106
Dave
Old 10-24-2010, 07:12 PM
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Default RE: Cox 049 mufflers

That's pretty neat, Dave, congratulations.

In general, the throttle rings work pretty good and they sell well for us.

However, the greatest drawback with them is that they preclude the simultaneous operation of a muffler. Because of this, we developped this product:

http://coxengines.ca/product.php?pro...&cat=13&page=1

Not quite the holy grail but a decent compromise.

I do like your setup and it seems fairly easy for a modeller to make himeself.

Cheers
Bernie


Old 10-26-2010, 01:06 PM
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propjobbill
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Default RE: Cox 049 mufflers


ORIGINAL: fritzke

Yuu:
My experimental throttle, would work as a muffler/exhaust diverter as well.
http://www.rcuniverse.com/forum/m_28...tm.htm#2874106
Dave

I have made several mufflers like this. They work great and as for a throttle this throttle also works great if you do a good job as you build it.
Old 12-18-2010, 05:21 AM
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adavis
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Default RE: Cox 049 mufflers


ORIGINAL: xenalook

Adrian,

We had them quoted a couple of times (OEM Cox version) and pricing was too high for the low run we were after (1,000).

We are presently having them quoted by another engine manufacturer and, if pricing pans out, will manufacuture them before the end of the year.

Our target is to have a retail price not exceeding $14.95.

Bernie
Bernie,

Any update on the muffler production?

Many Thanks,
=Adrian=
Old 12-18-2010, 07:49 AM
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Default RE: Cox 049 mufflers


ORIGINAL: icerinkdad
There was someone for awhile that made a silcone rubber muffler that was surprisingly quiet. Not the normal metal idea but who is to say that metal is the best material for this?
Bob
Bob,
You are correct. I have one around somewhere. You stretch the thing over the head and down onto the exhaust. Darned if I can remember who made it. Mine is gray silicone, relatively thin walled.

George
Old 12-18-2010, 08:09 AM
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Default RE: Cox 049 mufflers

Adrian,

There was lot of back and forth with correpondance, drawings and samples but we finally obtained a reasonable quote the other day. We will be placing the order shortly and they should be available for sale by March or so.

Bernie
Old 12-19-2010, 07:32 AM
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Default RE: Cox 049 mufflers

Hhhmmmmm... A thin silicone rubber 'sleeve' for a muffler, that you pull down over the head and cover the exhaust. Now, if we used a 'birth control' device, and left it full size, and wired the thing shut on the bottom of the cylinder, and let it hang back under the plane, or inside, it would collect all the exhaust 'slop' and keep the plane clean too. Now, what could we call it?
Old 12-20-2010, 11:07 AM
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Default RE: Cox 049 mufflers

ORIGINAL: Yuu

Hhhmmmmm... A thin silicone rubber 'sleeve' for a muffler, that you pull down over the head and cover the exhaust. Now, if we used a 'birth control' device, and left it full size, and wired the thing shut on the bottom of the cylinder, and let it hang back under the plane, or inside, it would collect all the exhaust 'slop' and keep the plane clean too. Now, what could we call it?
Here's what they look like. I removed it from my Tee Dee .051 powered Golden State Spitfire for pics. The tubing is 2" long, 1/2" OD, the hole for the cylinder is 7/16", and the thickness is 1/16".

George
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Old 12-22-2010, 01:30 PM
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adavis
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Default RE: Cox 049 mufflers


ORIGINAL: xenalook

Adrian,

There was lot of back and forth with correpondance, drawings and samples but we finally obtained a reasonable quote the other day. We will be placing the order shortly and they should be available for sale by March or so.

Bernie
Will the new muffler fit/work with your rear mounted throttle?

Best Regards,
=Adrian=
Old 12-22-2010, 01:39 PM
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Default RE: Cox 049 mufflers

Yes, definitely Adrian. That was the whole purpose of developping the rear-mounted throttle.

Bernie

Old 04-05-2011, 02:58 PM
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adavis
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Default RE: Cox 049 mufflers

Bernie,

Just wondering if there is an update on the muffler availability?

Many Thanks,
=Adrian=
Old 04-05-2011, 03:21 PM
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Default RE: Cox 049 mufflers

Adrian,

Our manufacturer is ready to go but we have not given the go-ahead yet due to financial constraints. We have so many projects on the go and they all cost big $$'s.

We recently made 020 glow heads, killer Bee cranks, 049 TD venturis, 020 RD venturis, 5-Fin glow heads, 049 TD cylinders, etc, etc.

Still a project, however

Bernie


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