Originally Posted by
BigEndBob
Lets face it CO from the exhaust would probably include all the other horrible stuff that stinks.
Even a miss placed crank case vent put fumes in the cockpit that made me feel ill.
I had a share in an enclosed cockpit vintage aeroplane which suffered part of the exhaust dropping off in flight. An electronic device in the cockpit alerted the (2000+hr instructor) flying it to high CO levels, who returned and landed, noticing increasing difficulty in managing his own flying, and feeling ill for some time afterwards. He did not notice any strange smells or fumes in the cockpit. So I think you are incorrect.
G