Originally Posted by
Bayfisher
Hi
On the GEs would u be able to tell me at what speed N2 do the EEC start to generate their own power supply? I can’t seem to find information on it anywhere. I’m thinking around 14% N2 but I’m not sure.
It's less than that - on the CF6-80C2 the PMA power (Permanent Magnet Alternator) come alive speed is 8% N2 (it's actually a little better than that - 8% is the requirement).
The 'stay alive' speed (as N2 spools down after shutdown) is even lower - down around 3-5% N2.