The down sides are that there are more electo-mechanical devices to break, is there a provision

to run both pumps for critical operations?. And, there might be fuel return issues- too much
fuel back to one tank, resulting in an overflow.

But, in a worst case scenerio, the worst I could do is dump only half my fuel. : )

Other people have suggested using the  manual fuel return selector to actuate the apropriate

fuel pump through the use of some sort of microswitch or some such thing. If I can figure out a
way to build a robust enough setup, that might be the way to go.

Decisions, decisions,....

Brian Trubee

I understood the idea of having 2 pumps when the injectors were in 2 seperate places and the
primary and secondary injectors were fed seperately, but now we have this manifold with all the
injectors in a line and I assume a single fuel rail...uh are we using one pump now?
...Chrissi

I use two pumps in parallel feeding one fuel circuit for all injectors.
Pumps are independently turned-on. I generally fly with both on all the
time, but could turn one off in cruise.
If your fuel injection pump quits your engine quits instantaneously, so
it's good to have some redundancy. That is how I turn off my engine,
which also relieves the pressure in the lines.

--
Perry Mick
Custom Composite Props
mick@bridgingworlds.com
http://www.ductedfan.com

 
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