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#21
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Piper Archer II Air Leak Problem by Back Seat.
On 01/17/07 08:35, Roy N5804F wrote:
Dave, I have signed up ! About the only instrument that I have not overhauled in this Archer is the VSI. It reads horribly optimistic, like, I have the only Archer ever built that climbs on the plains here at 1200 FPM. If I really try, I can make 1500 FPM :-) I have to admit that I don't know much about the operation of a VSI appertaining to an Archer :-( I can't get my head round it at the moment, but could the slight negative pressure in the cabin affect the VSI ? It shouldn't. The VSI should be vented (through a calibrated "leak") to the static air source, outside. The cabin pressure shouldn't affect it, unless you've selected the alternate static source, or there is a leak between the static source and alternate static source. -- Mark Hansen, PP-ASEL, Instrument Airplane Cal Aggie Flying Farmers Sacramento, CA |
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