About the fuel comming out of the
fuel vent. I have a 4 gal header tank like you. Sometimes
when I started the fuel pump it would spit some fuel out the vent, not every
times. I built a small tank, about 2 ounces and connected the vents
from the two lower wing fuel tanks to it and the header tank vent to the bottom
of this small tank. The top of this tank is vented. No more spit
out, when the header tank spit it drains back to the lower wing tanks.
Rino;
My vent system has a manifold block
where the lines from the sump and the 2 strake tanks join up to the single vent
line going out. I’m going to make a small accumulator as you did and
install in place of the manifold block. This should allow any foam coming up
from the sump to separate out, and the fuel drain back to the tanks.
How did you make your small tank? Since
I don’t have welding ability so I’m thinking of making it out of
fiberglass.
Al G
----- Original Message -----
Sent: Sunday, July 13,
2008 12:47 PM
Subject: [FlyRotary]
Re: pre-mix; great trip
Beautiful
picture Al. Good observations on performance. Glad to hear that
everything is working well.
Mark S.
On Sun, Jul 13, 2008 at 10:48 AM, Al Gietzen <ALVentures@cox.net>
wrote:
Another thing I notice
is a small amount of fuel is coming out of the fuel vent. The only
explanation I can come up with is foaming/bubbles forming in the return line
after the pressure regulator. This goes into the 3-gallon sump tank and
up the ¼" vent line. This may have been occurring previously, and
the fuel evaporated as it went back along the surface; but now the blue 2-cycle
oil is left behind to be quite visible at the back of the cowl; but I suspect
the pre-mix is exacerbating the foaming.
I notice the plugs have
less carbon than before, and the inside of the exhaust exit is now very light
grey.
Al
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html