The quickest way (if you're working operationally) is to get as close as you can (safely) to an OGE hover, observe all the numbers (and ambient temp) with your current loading and see what you've got left. Do the same on a regular basis to check ongoing engine performance.
If its a standard E model and so long as you ain't too high and too heavily loaded, confined ops shouldn't normally pose a problem. Just make sure you've enough power to clear the confined area (vertically) with sufficient space to nose forward from the top of the vertical ascent and gain forward speed - better to make two trips and than one permanent one!
HM
as a post script - should you ever be tempted to 'load up' n' go out of a confined area when you're too heavy, just remember that this could be you ...
Last edited by Hell Man; 7th Nov 2010 at 07:55.