TR,
The same Twin-Pac still flies today in the Bell 212/412 products as well as in the S-76B, and the remaining S-58T's that are still flogging it today.
The concept is the same, the probability of an engine failure still exists for EACH engine and having two of them adds to the probability of one of the engines failing. Thus, I would wager that Twin's have more engine failures than do singles.
That the impact of a single engine failure on a single engine machine is rather more dramatic than the same single engine failure in a twin also goes without saying.
The variables of OEI performance and ability to maintain flight in all regimes of flight is also something that has to be considered.
I just love the smart ass replies some people make as if they hold the only valid perspective on all things aviation.
When it comes to posting your credentials on line here, how do we know you are who you say you are unless you post your real name and occupation?
Some of you British Chaps seem to think a lot of yourselves.
Crab, a quick question.
However did the RAF and RN ever survive much less actually rescue people using the Whirlwind?