Bill Freeman wrote:

Paul,
Be aware that SCEET has a serious failure mode which
is not possible in SCAT.  The inner liner can delaminate
and collapse inward on any suction - type system.  This
may cause the loss of carb heat on the C182.  I can't use
SCEET in my Longe EZ since it is pulling all air thru a
piece of SCAT.  Annual inspection of the SCEET with
a specific look at the possible delam of inner liner should
be made.  I would not use SCEET in any application
upstream of a carb without an alternate air source.  I
have read about A/C downed due to this spcecific
failure.  SCAT, of course, has the steel wire coils to
prevent the fabric from sucking in.

Bill

My carb heat air comes from the heat muff on the exhaust pipe.
No ice there so not much of a pressure drop. The main duct takes 
air through the filter (possible pressure drop) and that
is not SCEET nor does it look possible in that application
due to size and shape.

SCEET has wire embedded in it as well. It looks to be bonded
together very well. It could be molded all in one piece.
In fact, that would make manufacturing  sense. I will cut
some apart and see if I can delaminate it. 

 I am surprised that they did not mention that in the
AC Spruce catalog. I read about a duct failure on a SeaWind powered
by a Subaru (NTSB). Was that the one you mentioned? Are you sure it was SCEET?
Huge product liability issue here.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org