Originally Posted by
SASless
Bront,
Are these numbers familiar to you re N-1/Ng Compressor Speeds for the C30 equipped Bell 206L series?
If as we have been told the Compressor Bleed Valve works up to about 92% at which time it is closed.....can we assume it is open sometimes during Normal Operations?
So, in fact, there is a bit more to this Compressor Bleed Valve operation thing than you post would suggest.
Am I wrong in thinking that?
If perhaps the Bleed Valve is malfunctioning or incorrectly adjusted....and remains closed at start that would. present a problem. If it was mis-rigged and was opening and closing incorrectly that too could cause a problem re possible Compressor stalls too...right?
The Bleed Valve on the 250 series engines has no adjustment/rigging that I know of, it either works properly or it doesn't and you replace it. It doesn't cycle as a function of N1/Ng, there is no direct link from RPM to cycle. The values are representative of the Pc (compressor discharge pressure) and are variable based on ambient temperature.