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CSpaced · 01-08-2007, 03:45 PM

Hey Guys,

I'm looking for pics of how people have been installing cannister mufflers in their composite airframes, specifically:

How big are you making the holes in the front of the fuse for the headers to come through?

How are you addressing keeping the inside of the fuse cool?

Are you building Tunnels?

Are you having to open up your cowls on the front any more to allow better airflow?

Thanks!

RickP · 01-09-2007, 07:04 PM

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Here's what I did. I have roughly twice this area cut out in the bottom of my fuse and it seems to be working. I am worried that I need more, but it does work.
RickP

jaguar bone · 01-09-2007, 08:31 PM

Gee - I don't have a comp - but ya have me worrying if I have a large enough vent hole in the back.
I love the way these things have no basic install parameters with them. It is strickly by trial, error and word of mouth (and internet!)

Any feedback on my install is welcome. This weekend is my first running of the engine!

jaguar bone · 01-09-2007, 08:34 PM

Okay - here are the pictures

Imac Kiwi · 01-10-2007, 02:57 AM

3.0M CompArf Extra with DA X-over Headers and Cannisters.

jaguar bone · 01-10-2007, 06:01 AM

	Quote: Originally Posted by Imac Kiwi
	3.0M CompArf Extra with DA X-over Headers and Cannisters.

Imac Kiwi - how long is that inside header mount cap screw? I am amazed and baffled to see your install of this fastener!
Also have a pic of the exit hole for the exhaust? I'm curious about how much you have opened it up.

Sweeeet install too BTWay, dude!

Neogenesis · 01-10-2007, 12:21 PM

	Quote: Originally Posted by Imac Kiwi
	3.0M CompArf Extra with DA X-over Headers and Cannisters.

What the purpose of crossing the headers? Wouldn't it just be easier to use a standard drop?

Neo

CSpaced · 01-10-2007, 12:31 PM

The cross headers allow the stinger from the cans to be further forward than with standard drops. The headers have to be a particular length so cutting them is not really an option.

For example, I have headers on my MTW cans that go straight back, but upon installing them I found that the stinger was positioned directly over my gear plate! I talked to DA and they informed me that there is a minimum length that you can cut the headers down to, and I was able to cut off an inch on the header in question to get the stinger in front of my gear plate.

Neogenesis · 01-10-2007, 12:42 PM

	Quote: Originally Posted by CSpaced
	The cross headers allow the stinger from the cans to be further forward than with standard drops. The headers have to be a particular length so cutting them is not really an option. For example, I have headers on my MTW cans that go straight back, but upon installing them I found that the stinger was positioned directly over my gear plate! I talked to DA and they informed me that there is a minimum length that you can cut the headers down to, and I was able to cut off an inch on the header in question to get the stinger in front of my gear plate.

Good to know...Thanks!!!!

Neo

jaguar bone · 01-11-2007, 05:56 AM

Gee, what the heck is the stinger?

Richo · 01-11-2007, 07:11 AM

Hi,

Here is a couple of shots of my Comp-Arf 260. I'm using BMB cans, which use a pretty short header. I've use MTW with crossover headers (same as imac kiwi's) in my superXtra wich worked pretty good.

I have ventelation holes in the botom of my fuse, and so far I havent encountered any heat related issues, with either set up.

CSpaced · 01-11-2007, 07:54 AM

	Quote: Originally Posted by MERCURY DAYDREAM
	Gee, what the heck is the stinger?

When I say stinger I am referring to the part where the exhaust comes out of the muffler.

jaguar bone · 01-12-2007, 06:13 AM

	Quote: Originally Posted by CSpaced
	When I say stinger I am referring to the part where the exhaust comes out of the muffler.

I guess my question really border-lined on 'stupid'.
Thanks for the civil reply!

Temptation · 01-12-2007, 06:50 AM

	Quote: Originally Posted by MERCURY DAYDREAM
	I guess my question really border-lined on 'stupid'. Thanks for the civil reply!

The only stupid questions are the ones you don't ask.

Mike Darr

jaguar bone · 01-13-2007, 07:58 PM

I had two successful maiden flights today with my DA & KS Canister 'cans'.
I did have one problem, the black clamps that connect the sleeve to the header and can did not hold up to the job. My canister come off the sleeve. Now those clamps were a bear to spread and put in place, so I'm surprised the two separated.
I'm thinking I have dual option - so any suggestions ( your tried and true solution?) are welcome.

Use RTV Silicone for sealing the sleeve to the header & canister and clamp with automotive screw-spring type clamps. ( I used the copper gasket as sealer in the install so no adhesion was provided by the sealer.)

2. Mechanically fasten the canister to the fuse (in addition to the bulkhead with the silicone spacers). Possibly use a heat resistant thick fiber type washer passed over the 'stinger' stopping at the canister. Then attach a wire from the washer to a screw at the front of the firewall.
Help?

01-08-2007, 03:45 PM	#1
CSpaced Smoke on! Join Date: Jul 2006 Location: Oak Ridge, NC Posts: 4,211 Awards Showcase Total Awards: 1	Comp's and Can's Hey Guys, I'm looking for pics of how people have been installing cannister mufflers in their composite airframes, specifically: How big are you making the holes in the front of the fuse for the headers to come through? How are you addressing keeping the inside of the fuse cool? Are you building Tunnels? Are you having to open up your cowls on the front any more to allow better airflow? Thanks! __________________ Chris Mulcahy - IMAA District IV Assistant Director *www.Crackroll.com*

01-09-2007, 07:04 PM	#2
RickP Gettin' Lower! Join Date: Jul 2006 Location: Levittown, NY, USA Age: 42 Posts: 57	Re: Comp's and Can's Here's what I did. I have roughly twice this area cut out in the bottom of my fuse and it seems to be working. I am worried that I need more, but it does work. RickP

01-09-2007, 08:31 PM	#3
jaguar bone balsa, glue & gas Join Date: Jun 2006 Posts: 2,972	Re: Comp's and Can's Gee - I don't have a comp - but ya have me worrying if I have a large enough vent hole in the back. I love the way these things have no basic install parameters with them. It is strickly by trial, error and word of mouth (and internet!) Any feedback on my install is welcome. This weekend is my first running of the engine! Last edited by jaguar bone; 01-09-2007 at 08:36 PM.

01-09-2007, 08:34 PM	#4
jaguar bone balsa, glue & gas Join Date: Jun 2006 Posts: 2,972	Re: Comp's and Can's Okay - here are the pictures Attached Thumbnails 47.3 KB · Views: 184 175.7 KB · Views: 206

01-10-2007, 02:57 AM	#5
Imac Kiwi Bad-ass Super Contributer! Join Date: Jan 2006 Posts: 878	Re: Comp's and Can's 3.0M CompArf Extra with DA X-over Headers and Cannisters. Attached Thumbnails 50.2 KB · Views: 218 __________________

01-10-2007, 12:31 PM	#8
CSpaced Smoke on! Join Date: Jul 2006 Location: Oak Ridge, NC Posts: 4,211 Awards Showcase Total Awards: 1	Re: Comp's and Can's The cross headers allow the stinger from the cans to be further forward than with standard drops. The headers have to be a particular length so cutting them is not really an option. For example, I have headers on my MTW cans that go straight back, but upon installing them I found that the stinger was positioned directly over my gear plate! I talked to DA and they informed me that there is a minimum length that you can cut the headers down to, and I was able to cut off an inch on the header in question to get the stinger in front of my gear plate. __________________ Chris Mulcahy - IMAA District IV Assistant Director *www.Crackroll.com*

01-11-2007, 05:56 AM	#10
jaguar bone balsa, glue & gas Join Date: Jun 2006 Posts: 2,972	Re: Comp's and Can's Gee, what the heck is the stinger?

01-11-2007, 07:11 AM	#11
Richo "Still living this dream...." Join Date: Jan 2006 Location: Brisbane, Australia Age: 53 Posts: 2,502	Re: Comp's and Can's *Hi,* *Here is a couple of shots of my Comp-Arf 260. I'm using BMB cans, which use a pretty short header. I've use MTW with crossover headers (same as imac kiwi's) in my superXtra wich worked pretty good.* *I have ventelation holes in the botom of my fuse, and so far I havent encountered any heat related issues, with either set up.* Attached Thumbnails 34.3 KB · Views: 137 29.9 KB · Views: 144 88.3 KB · Views: 42 __________________ *Cheers,* *Richo*

01-13-2007, 07:58 PM	#15
jaguar bone balsa, glue & gas Join Date: Jun 2006 Posts: 2,972	Re: Comp's and Can's I had two successful maiden flights today with my DA & KS Canister 'cans'. I did have one problem, the black clamps that connect the sleeve to the header and can did not hold up to the job. My canister come off the sleeve. Now those clamps were a bear to spread and put in place, so I'm surprised the two separated. I'm thinking I have dual option - so any suggestions ( your tried and true solution?) are welcome. Use RTV Silicone for sealing the sleeve to the header & canister and clamp with automotive screw-spring type clamps. ( I used the copper gasket as sealer in the install so no adhesion was provided by the sealer.) 2. Mechanically fasten the canister to the fuse (in addition to the bulkhead with the silicone spacers). Possibly use a heat resistant thick fiber type washer passed over the 'stinger' stopping at the canister. Then attach a wire from the washer to a screw at the front of the firewall. Help? Last edited by jaguar bone; 01-13-2007 at 11:45 PM.

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