Originally Posted by
RandomPerson8008
The confusing part about that statement in the POH is that the emergency procedure for losing the tach includes "use governor", which in electrical failure you will not have either.
I get it, though. Helicopters are weight critical and expensive enough without extra parts like small generators for the tach.
Why is this confusing to you? Tach failure and Electrical failure are two seperate emergemcies. Sure Electrical failure includes Tach failure, but Tach failure does not include Electrical failure. There's Governor failure too you know, as a completely seperate issue.