I was told the reason the 300CB has no OGE performance charts is because it was brought out in a hurry to get a foothold in the training market after Robinson had a few problems and were grounded in the early 90's.
The numbers as I used to teach for the 300CB or 300C (they are fairly similar in performance, the C having a little extra grunt) approaches and departures:
After powercheck at 42 knots S&L (approx 18-19" MAP depending on the conditions):
Less than 4" MAP: Running Landing
4" MAP: Zero/Zero Approach
5" MAP: Normal Approach
6" MAP: HOGE (+1" to arrest descent at the bottom, very handy)
After powercheck at 2 foot hover (approx 24-25" MAP):
Less than 1": Running Takeoff
1" MAP: Cushion Creep
1-2" MAP: Towering Takeoff
More than 3" MAP: Vertical Climb OGE can be acheived.
Of course some of these approaches will take you through the H/V curve. I strongly recommend a good deal of practice using these techniques with an instructor at the training field before attempting anything else.
You should also really question whether you are doing the right thing by making a limited power approach into a confined area. Less weight, heat or height may be a better idea than trying to get into something you can't get out of.
Hope this is useful.
Gov
[This message has been edited by The Governor (edited 19 April 2001).]