Manifold Pressure Gauge

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Subject:		Manifold Pressure Gauge
From:		Carl Pattinson (carl@flyers.freeserve.co.uk)
Date:		Wed Sep 03 - 2:02 PM

I am just filling in the LAA form to change our propeller (from a fixed 
pitch to a CS version - Woodcomp/ Smart Avionics controller). The engine is 
a Rotax 912 UL 80hp.

The LAA form says that the installation of a manifold pressure gauge is 
mandatory. Anyone know why?

 Its probably a dumb question but I dont understand the point of monitoring 
manifold pressure on a normal engine. I always thought it was more relevant 
to turbocharged engines.

Also where does one take the pressure takeoff on the engine - I would guess 
the balancing pipe between the carburettors - is there a mod required on the 
engine?

Thanks for the explanation in advance.

Carl Pattinson
G-LABS


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