distaff_beancounter
Apologies for the tardiness - I didn't see your reply
I didn't know they (Cabair) had some with and some without - maybe they only hire me the clapped-out ones without because they envisage me doing EFATO or shut-down/restart practise
WRT my comment about higher IAS for non AC-fitted restarts, I think we're at crossed-porpoises (my fault):
I meant that, because the electric starter turns the engine so slowly (and consequently creates little oil pressure), it
only just starts to move from fully-feathered - it then can windmill in the faster airflow and
this is what drives the oil pump and creates the higher oil pressure to drive the prop towards fine pitch. I didn't mean the higher IAS would windmill a feathered prop.
Whereas one
with an AC would move more rapidly toward FP, necessitating a lower IAS (and airflow) to windmill.
But I'm probably completely wrong. DOH!
Has that made what I meant clearer or worse?!
So I guess the biggest benefit of having an AC is where (for whatever reason) you are trying to airstart and don't have a lot of altitude to play with to gain the additional airspeed to make the prop windmill...