VNE differences between 250-C20B and C20R/2 engine
Could somebody explain why the VNE is differs between the two engines, for the same type?
For example, at >2,500 lbs, 30 deg C OAT, and a pressure ALT of 6,000' the VNE for the 500D equipped with a B engine is 103 KTS. With the (more powerful) R/2 engine it is 96 KTS.
On the 500E the respective VNE's are: 102 KTS (B engine) vs 96 KTS (R/2 engine).
(Source: VNE placards from the MD Rotorcraft Flights Manuals: 500D revision 9; 500E revision 14)