zorab - condesending, dim and false premis - didn't say practice - said "tested" - it needs to be
tested - point being it may well be
much much messier than the idealised expectation - and it is
'untested'.
wasn't suggesting a straight forward 'line pilot' tries it
I would suggest someone competant should do it under proper controlled conditions - a factory test pilot scenario would be the logical method.
especially since it may well lead to damage - try and give a little thought to implications of a relatively high unuseable fuel (just try giving it
some thought wrt natural period of governing system and response time of other engine and freewheel units etc-
if you can?)