I fixed the trap problem by shortening the flex tube connecting the NACA
scoop tube to the vent tube.

Thanks for the input.

Eugene Long
Lancair Super ES
glong2@netzero.net
-

----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John
Schroeder
Sent: Saturday, May 12, 2007 12:52 PM
To: lml@lancaironline.net
Subject: [LML] Re: IO-550 fuel injection

Eugene -

You might be able to duplicate the situation per your hypothesis by
injecting about a dropper full of water into the NACA duct end of the vent
lines. I wouldn't take off with the water in there, but you might be able to
detect a slowing of the fuel feed after you go thru your fuel management
routine and ground runup. If it does not repeat, you may still be able to
catch a negative pressure in the tanks by droppering a little water around
the filler and seeing what happens when you slowly open the cap. If the
pressure were high enough to suck the water into the tank, you could tell by
trying to suck the water out of the trap with a syringe/baster. If none
comes out, the hypothesis would weaken (?)

I don't believe our wingtip hose/vent line is in the same configuration ie.
"p" trap shape.

Just some noodling on this one.

John

PS: On Sat, 12 May 2007 12:28:23 -0400, glong2 <glong2@netzero.net> wrote:

> No I
> have not drained the gas filter because I hoped to repeat the problem. Now
> that I have a "high probability" solution I will sump the filter.




--
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html