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Ok, my bad wag {:>)
Still, sort of hard to understand why you were getting lower manifold pressure with the filter gone and the prop blasting into the TB. I could understand peaks and valleys, but would sort of think it would average higher rather than lower.
I'm sure you will lets us all know when you do {:>)
Ed
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From: "Ernest Christley" <echristley@att.net>
Sent: Monday, June 20, 2011 12:37 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Filterless Values of MAP FlyRotary] Re: Blower does work
Ed Anderson wrote:
Regarding the Filterless values - in looking at your photo, if all you do is remove the filter and leave the curved intake tube in place - then what you may be getting is a prop effect of the wind blast past the end of the tube - causing a possible lowering of pressure in the tube (siphoning out the air trying to go down the tube) - just a WAG.
Not a bad WAG. What I actually did was remove the elbow with the filter. The throttle body was bare, sucking straight from the prop "blast", or at least what there was of a blast. It would make sense that the MAP sensor would be wide open to wild fluctuations.
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