but the number of accidents due to "falling through" while trying to enter an OGE hover is very real and happens very often
My first turbine was the 204, and we were taught a very simple means to establish what the capabilities of the 204 were when it came to landing. Meant primarily for mountain type work. Worked like this, though forget the exact figures.
1. Establish level flight at the intended altitude of landing at 60 knots
2. Note TQ
3. Pull power till reaching rotor droop and note TQ
4. If the difference between the two TQ readings is in excess of X, an OGE is possible
5. If the difference is between X and Y an IGE is possible
6. If below Y a run on is required
Often wished all types had a similar gouge.