The Puma HC1;1971-1978. The 330J; 1978-1982. The 332L/1; 1981-2008.
A Cat; British, Australian and Chinese licenses.
They were modified after the Belize crash in 1976. This is Shy Torque's post on that thread which describes it.
[QUOTE][/
The Pumas electrical system was modified after this accident. The normal main rotor speed (Nr) limits were 258 to 272. If the Nr dropped to 240 for 2 seconds, the alternators tripped off. The system was modified to remain on unless the Nr dropped to 220.QUOTE]
Up to that point if an engine failure occurred at a heavy weight and high power demand the rotor would droop more rapidly than one could be expected to correct for it. Later Pumas with the Makila could cause no more concern than a decibel failure on one side.
Last edited by Fareastdriver; 29th Sep 2015 at 13:04.