Originally Posted by
KloseEnough
I don't think CO is a likely issue in turboprops, I've only ever heard of it for piston engines. Not sure about the exact layout of the exhaust and firewall, though.
The T-34C primary trainer that the Navy used for nearly 40 years had a for sure CO risk based on where the exhaust stacks were and the (abysmal) seal configuration for the sliding canopies. We had a NATOPS procedure for it and everything. Yes, it was A Known Issue.
For what it's worth, you could fly the T-28 (B and C) with the cockpit open - that was a recip with a powerful Wright Cyclone air cooled engine. Due to how and where the exhaust was configured, the pipes being a bit lower down and a bit further aft, you could have the canopy open inflight. My memory is somewhat foggy on that given how long it has been since I flew in a T-28, and I only recall one or two times that we flew with it open. We generally did not, however, when I was in training.
And before you ask: yes, we had electricity way back then.