Shawn & Prehar,
Well here goes:
I had raised a query with Bell in Feb2009 as follows:
Code:
The basic RFM for
Bell 412 EP lays
down the engine torque limit of 81% for 2.5' OEI
operation.
FMS 56.3 & 56.4 for
30' power setting for DF engines retains the same 81% engine torque limit for
2.5' OEI operation.
If you look at the
performance graphs for Target Torque in FMS 62.3 & 62.4 (Cat A operations
with D series engines), the maximum 2.5' engine torque is only 73% at -40
degrees at Sea level. At 20 degrees and 30 degrees we get the figures of 67.5%
and 65%. Since the graph talks of Power Available for 2.5' OEI operation, does
it mean that the power limits of 77% (30') and 81% (2.5') are just figures that
can not be achieved?
Based on this query, I believe, the Tgt Torque graph was revised last year in Jul2009, shifting the entire graph right and also increasing the max limit to 81%.
With the revised graph the tgt tq has increased (ex 30deg C SL the fig has inc from 67% earlier to 73% now) and so on.
My quest is, with this inc in tgt tq shouldn't there be a corresponding inc in the RTOW for Cat A ops?
Helibuoy