Test
I just did this. I used flight attitude for one test, with three iterations.
Then I rolled the nose wheel up a car ramp and came up with 13.5 degrees NU...and yes, the tail was pretty much on the ground. YMMV, as I have EFII with dual electric pumps...
I performed the same test, with three iterations.
The average of the three from each pitch is what was used to compare to the minimum recommended fuel flow.
As a side note, I think that the nose DOWN pitch would be a bigger concern as it would be possible to unport the supply. In a nose UP scenario, all fuel flows TO the supply line.
I did find that nearly all the fuel was useable in level attitude. I measured what was left when the pump couldn't draw any more...it was about 3 ounces...
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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