Hello SpeedyG
My company operates more than a handful of Bell 212 helicopters which also run on PT6 engines (-3B twinpack)
And work up between 5 and 15 starts a day on batteries, and this in temperatures ranging from 20+ in the summer to -35 in the winter (itīs in the arctic) And they never give us any grief. We run on Ni.Cad "Marathon" batteries. Itīs only good that they work and are exercised. And if you have a good Batt.overhaul facility which check the individual cells on overhauls you should be fine.
Regards
Last edited by Heliarctic; 7th Nov 2009 at 17:58.
Reason: Add on