re my last post:
Sorry tc about the time delay.
the FM for the BK117 does include the climb rate issue. under Supplement 11-3, Operation with Doors removed, para 5.2 rate of Climb
"Subtract corection value as indicated below from the rate of climb obtained from the applicable performance chart of basic flight Manual.
Gross weight (kg): ...............ROC Correction (Ft/min):
1700 - 2200 .....................450
2200 - 2850 ......................350
2850 - 3350 .........................250"
As the doors open ROC correction reduces with GW, it consistent with aerodynamic reasons (actual ROC reduces with GW, and drag is exponential, therefore correction reduces accordingly).
The BK117 also has a statement in the CAT A supplement that with doors open/removed, the aircraft is not certificated for CAT A. Cat A is only available in the B2 to 2900 kg, so removing around 350 ft/min due drag of the open doors will cause the aircraft to fail to meet the CAT A profile.
I think!