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Knife edge oil pressure drop

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ssmdive

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OK, so I was reading on here how oil systems pickups and such normally have a good and a bad side for knife edge flight. So I went up last weekend and did a left wing down knife edge and my oil pressure started to drop like a dead sticked pitts. So I rolled upright and let it come back up and then tried a right wing down knife edge... And the same thing happened.

I assume I should just avoid knife edge flight for more than point roll time?
 

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