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1. 11:43 AM - Re: Re: exhaust system modification (Bob Haas)
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| Subject: | Re: exhaust system modification |
Lynn, Makes sense to me. Right now I would have to 15000 ft.
or higher to justify a heat muff. My aircraft only flies in the confines of
the
Florida Peninsula, no heat required. Bob Haas.
-----Original Message-----
From: Lynn Matteson
Sent: Saturday, June 09, 2012 1:26 PM
Subject: Re: JabiruEngine-List: Re: exhaust system modification
Thanks, Bob. The other reason that I did not try to "tune" the
primary pipes to the suggested 32" was because of the problem of
wrapping a heat muff around the pair of pipes on each side. If I had
added some "extender bends" to the rear pipes, the heat muff would
have been the size of a 55-gallon barrel. Here's a picture of the
heat muffs prior to welding on the in and out tubes, which are now
finished and installed:
Now that I look at the picture again, the heat muffs will stay the
same regardless of what I do to the Jabiru original rear primary
pipes, as long as I do it before the slip-joint....Duhhh!! (sometimes
I engage the fingers before the brain) Let me start again....the
main reason that I did not make all pipes the same length was to be
able to expedite the job, and get back to flying.
By the way, Burns' Stainless sells the tabs and springs (called
beehive springs, I think) and also sells stainless steel tabs which
sit side-by-side on the to-be-connected pipes and are held together
by a bolt.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with 1280 hrs... (since 3-27-2006)
On Jun 9, 2012, at 10:44 AM, Bob Haas wrote:
> <checkpoint2@comcast.net>
>
> Hey Lynn That is a positive move. I extended the
> pipes from the two into one junction and added approximately 24
> inches of extension
> each side. I used motorcycle tabs and springs to support the
> additional weight. It is not tuned but it's not too loud, and no
> cracks in about a 100
> hours. I like your idea though. N 380 BH Alpi Pioneer Jabiru 2200.
>
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