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Thread: New CHC S-92
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Old 6th Nov 2007, 21:19
  #27 (permalink)  
HeliComparator
 
Join Date: Aug 2004
Location: Aberdeen
Age: 67
Posts: 2,090
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The first S92 did not have RIPS on delivery (for some reason eminating from Sikorsky) but it has now been retrofitted. As far as I know, the subsequent deliveries will have RIPS. Without the limited icing clearance enjoyed by the AS332L/L2/EC225 family, non-RIPS S92s would be stuck down in the weeds in winter, so its pretty much essential.

That said, its interesting to note that our de-iced S92 can barely fly on any more days than non-deiced French offerings. Yes the Super Puma family must have a positive temperature band starting 500' above the min operating height (500' over water) - ie it must be +0 deg C at 1000' above sea level.

But there are a number of RIPS failures on the S92 which require the pilot to "vacate icing conditions" straight away. The RFM omits to tell the pilot how he is supposed to do this. The only realistic way is if there is positive air into which he can descend. For this reason the BHL S92 fleet has very sensibly decided to require positive air temp at 500' above sea level.

So all the complexity, cost, maintenance penalty, weight etc of the RIPS just allows the S92 to depart on a day that is 1 deg C colder than the coldest day that the Super Puma family can depart (taking 500' = 1 deg C). Its only worth having RIPS because the limited icing clearance is a concept not invented by Sikorsky and so they are damned if they are going to certify for it on the S92!

HC
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