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Old 03-13-2014, 12:31 PM
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Glide = low power. The bigger the pressure drop - i.e. less power and the throttle plate mostly closed - the bigger the temperature drop.
Your manifold pressure gauge would have a "high" reading if it is the Isspro or similar because it reads inches of vacuum and high number = low pressure
Airplane gauges are backwards and read absolute manifold pressure.

Quote:
Originally Posted by lat 64 View Post
I'm a couple of months out before I can do this check, but I can easily find carb-ice conditions this spring. I looked again at your chart in post# 5. It looks like I'm very often the blue zone at least. I am understanding that "glide" power settings is low manifold pressure? That is, a greater pressure drop across the venturi? That would be just like when I am running the engine at a high idle with no load at the slip.

I'm now excited to look into this. It fits the problem of shutdown I have been dealing with since I owned the boat.

I'll have to get my camera ready and try to make this happen so I can see if it's real or just my over-thinking it.

Good thread,

Russ
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