To provide an example of Ghengis' point.
Some years ago I was involved in exploring the options in a Sea King post tail rotor failure. We found, in the sim, that it was perfectly possible starting from a 40' hover to pull pitch, climb vertically while ignoring the violently spinning visuals to 2000', then shut down the engines and execute a successful EOL. Curiously, we never wrote this technique up as advice to crews. <img src="eek.gif" border="0"> <img src="wink.gif" border="0">