In the Limitations Section of the R22 Flight Manual (POH to our FAA brethren) is the following Limit, which I paraphrase as I don't have the Manual in front of me:
Surface Wind 25 Knots or more, or gusting 10 knots or more, aircraft may only flown by a pilot having 150 hrs helicopter time and 50 hours on type.
So, 25 knots or 15 gusting 25: do not fly unless you meet the criteria.
Whilst an FI may meet the experience requirement, the student is unlikley to, so training is not on. Unless the FI is going to hog the controls for the duration!
And what about controllability in crosswinds and tailwind? 'Demonstrated' at 17 Kts. Generally way beyond most PPL/SPL at 25 Kts anyway. And mine, even as a 9500+ hour graduate tp with 1000 hours or so on the R22!
Very good idea of CFI to put aircraft in hangar at 25 Kts!
I think Rotorfossil will agree that the organsiation we both worked for did operate above the (now) limit before that limit was introduced, and that generally one was limited (sic) in what work could be done with the aircraft in those conditions.
The Limit was imposed as part of the package of measures following th FAA /NTSB review of the spate of R22 accidents in the early 1990s involving possible low g, turbulence, loss of RRPM and mast bumping. I think the R44 has a similar Limitation.