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Very Good Point, Rusty. I had not even considered that the regulator might not adjust for less than ambient pressures, but that would explain why neither one I had seemed to do what I thought it should.

Ed A

----- Original Message -----

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Sunday, January 23, 2005 12:00 AM

Subject: [FlyRotary] Re: Ah Ha! Pressure Regulator Problem?

This Regulator is designed for turbo or supercharged engines. As boost pressure increases, more fuel is required by the engine. This regulator features a boost reference circuit that adds more fuel in relation to boost pressure.

Hi Ed,

Do you think there's a chance this regulator only adds pressure when it sees boost, and can't reduce pressure for anything less atmospheric? As we've discussed, the feature really is meant for turbo/supercharged usage, so perhaps they designed this regulator specifically for that purpose, and allow it to stay at a fixed pressure when not under boost. Just a guess, but it would explain how you've had two of them, and neither worked the way we would expect.

Rusty