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ACRO E-mail Archive Thread: [Acro] Re: FUMES IN COCKPIT

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ACRO E-mail Archive Thread: [Acro] Re: FUMES IN COCKPIT


Thread: [Acro] Re: FUMES IN COCKPIT

Message: [Acro] Re: FUMES IN COCKPIT

Follow-Up To: ACRO Email list (for List Members only)

From: "Peter Ashwood-Smith"<petera at>

Date: Fri, 05 Apr 2002 13:55:06 UTC


Like Alex said, the fuel sloshes around and some of it comes out the fuel
vent and may or may not get into your cockpit. This happens as you go
through the knife edge in the T. If you watch somebody with a full fuel tank
doing acro down low, you can often see the small spray of vapor coming off
the fuel overflow or the little oil puffs coming out the overflow tube.

On Caps and some other aircraft the fuel overflow was moved down onto the
gear leg, presumably to reduce the periodic smell of gas, but that led to an
aircraft burning down when its venting gas ignited on the hot brakes and
also I believe mud/grass/bugs plugging the overflow.

Obviously though the smell should not be anything more than a wiff, if the
smell is persistent then there is something wrong and it should be checked
carefully. Obvious things that can cause problems are old fuel lines which
have a tendency to crack underneath the metal sheathing and cracked fuel
tanks. Fuel lines are especially prone to problems if they were recently
removed and reinstalled in a slightly different configuration. There is lots
of good stuff on fuel system problems in the IAC technical tips books which
you can get from the IAC. 


	-----Original Message-----
	From:	Alex Belov [SMTP:belov at]
	Sent:	Thursday, April 04, 2002 10:34 PM
	To:	charles chadwick
	Cc:	iac list
	Subject:	[Acro] Re: FUMES IN COCKPIT

	Fuel vent?

	Happens in my T often in right knife-edge as little bit spills
	overboard...after a while started looking forward to it and
beginning to
	like it.  that stuff aint addictive, is it?  :-)


	Alex Belov, President
	International Aerobatic Club Chapter 52

	On Thu, 4 Apr 2002, charles chadwick wrote:

	> I have been flying a friends S2B for a few weeks and notice gas
	> in the cockpit.  They only seem to occur during acro. The plane
	> apparently had this problem for over four years.  There is no
	> evidence of a fuel leak.  Any ideas on where to look and possible
	> solutions.  Thanks.
	> Ron Chadwick
	> bubbaron at
Attachement 1: part2.html


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