----- Original Message -----
Sent: Thursday, January 12, 2006 4:37
PM
Subject: [FlyRotary] Re: return
lines
OK! So what size?
Already have 1/4" vent, 1/2" supply. Should the return be larger then supply,
similar to oil return lines? Don't want to have to do it three times (like I
usually do)
Hi
Tom,
Yes, you
need to run return lines, unless you have some sort of header tank that can be
used for the return. I believe we can probably all agree that it's best
to go back to the tank though. If you use a system like Tracy has, where
you feed from only one tank, then you can return to only that tank as
well. If you think you might ever install a duplex valve to feed/return
from both tanks, then you'd better install a return on both tanks now.
(You're welcome Rich <g>).
You can run
the returns just through the root rib, but it's somewhat better to run them to
the far outboard end, similar to the way Van has you run the vent line.
It gets the warmer fuel outboard, away from the pickup, and positions it
in an air pocket, so there won't be any backpressure on the return
line. You can also run the pumps for a few minutes to aid in
mixing the oil into the fuel if you're using premix.
As for the
size, there's no need for larger return lines than what you ran for the
supply, though it certainly wouldn't hurt. I'd run AN-6 size for all the
fuel lines.
Cheers,
Rusty
(video's were cool Bob)