MAR34807@aol.com wrote:

I have a low pressure fuel injected C177RG (Cardinal). It has a complex
venting system (much like the 210-same wings), 2 beneath the floor sump
tanks, and interconnected crossover vents that go from wing tank to the
opposite wingtip and extending out 1/2" or so (watch out, the wingtip vent
has a small unseen hole drilled into it, more to allow venting if mud daubers
plug up the outlet, than getting blocked by ice as they are in trail) as well
as vented fuel caps. No check valves, so fuel leaks out the vents when full
(very little wing dihedral). The underfloor sumps have simple al tube vents
(NO DOUBLE WALL) themselves that run back inside the passenger compartment
(!) to the wing tanks, as well as drains. LFB-off fuel selector valve. No
vapor return. I have 7 sump drains. 1 for each tank, 1 for each x-o vent
line, 1 for each sump, 1 for gascolater.

It has NEVER drained evenly while in flight.
Low pressure fuel injection systems should not be compared to high pressure
automotive type fuel delivery systems.

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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