That is the engine out light---there is no low RPM warning in this particular Huey.
Yet the caption on the light clearly says RPM LIMIT?
Nah--this is an old steam gauge not an instantnaeous VSI, I can assure you the ROD was about 1,000 fpm at entry. The 2,500 was in the nose dive to gain our speed back, and we had somewhat levelled by about 100' short of the flare, 200' agl
The VSI seems to respond quite quickly enough to the whole of the auto - we used to reckon on wings level by 300' for a 100' flare height - I reckon in a Huey you can almost do what you like, especially in a light one.
This technique is good for areas where you have only a toght spot to go as your descent profile is steeper, allowing you to almost geet it into a confined area.
In that case, why would you not teach a constant attitude EOL? Speed back to around 30Kts, gives a steep approach with no flare required, just a handful of collective at the bottom. If you have limited space available, why would you keep at 50 to 60 and flare? Sounds like a recipe for a tail strike.