Multi Engine Helicopters & the HV Curve
Shawn Coyle in his book titled "Cyclic & Collective" on page 338 details an interesting fact about Civil helicopters over 6000Lbs, certified under Part 29, Transport Category with more than 9 passengers ie S76, AS365, B412 etc.
The HV curve is placed in the LIMITATIONS section of the flight manual.
Therefore, conducting a vertical climb for takeoff procedure eg from a confined area (as detailed in the CAT A Supplement) is violating a Flight Manual limitation unless the helicopter is operating at or below the CAT A performance weights.
Exemption
HEMS helicopters however can be exempt from this limitation as they carry less than 9 persons, however a Flight Manual Supplement must be approved by the FAA/CAA for their Air Ambulance Operation.
Does anyone have one of these FM Supplements in their flight manual and are able to email me a PDF copy?