Today's Message Index:
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1. 04:18 PM - FAB and cowling clearance (PGLong@aol.com)
2. 05:39 PM - Re: FAB and cowling clearance (N8292W@aol.com)
3. 05:53 PM - Re: FAB and cowling clearance (PGLong@aol.com)
Message 1
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| Subject: | FAB and cowling clearance |
--> RV4-List message posted by: PGLong@aol.com
On my RV 4 with an older cowling, the clearance to the filtered air box is
quite close to the lower cowling. How much space should there be between the
air box and the cowling to prevent these components from touching? Thinking
of 1/4" to 3/8". If more is needed, I'll have to shave the rear corners off
the air box and reglass. Anyone else had these problems? Also, does the air
box just use air in the lower cowl for a source of heated air?
Pat Long
PGLong@aol.com
Working on an RV-4
Bay City, Michigan
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Message 2
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| Subject: | Re: FAB and cowling clearance |
--> RV4-List message posted by: N8292W@aol.com
Hi Pat -
On my -4, there is very little clearance. I think at times it rubs and does
not seem to be an issue. It is real hard to see how much clearance there is
as I have a lot going on behind it and can't see it well. I would imagine
1/4" would be fine.
As far as your other question, you pipe the carb heat to the special fitting
that clamps on the crossover on the exhaust, and yes, it just draws in
undercowl air across the exhaust into the airbox.
I hope this helps!
-Mike Kraus
RV-4 N223RV
43 hours and ready for SNF!
Canton, MI
Message 3
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| Subject: | Re: FAB and cowling clearance |
--> RV4-List message posted by: PGLong@aol.com
Hi Mike
Thanks for your prompt response. I'm not sure I understand about the carb
heat source. I have a heat muff for cabin heat and it also has a port that is
open and dumps into the lower cowling area plenum. Are you saying that this
port has to be piped over to the FAB hinged door? My FAB didn't come with any
special fitting for admitting warm air other that the "U" shaped hinged door
that opens into the lower plenum and admits air that has been heated by the
engine. Thanks again!
Pat Long
PGLong@aol.com
Working on an RV-4
Bay City, Michigan
Do Not Archive
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