I am no Test Pilot but seems to me we are talking in circles.
1. If a take off or landing profile is 'certified' (accepted by the authorities as Cat A compliant) then it cannot by definition conflict with a mandatory (listed in the 'Limitations' section of the RFM) HV envelope.
2. My AW 139 has a Vertical Helipad profile with optional TDPs between 35 and 70 feet and a Short Field Take Off (vertical ascent to TDP) with TDPs between 85 and 400 feet ATS, published as Cat A compliant.
3. These profiles are clearly in conflict with the HV envelope.
4. The size of the HV envelope is variable according to WAT inputs but the TDP options are not WAT-dependent.
Maybe somebody who knows how this apparent conflict can fit into our understanding can explain it to me and not just quote isolated bits of the FARs/JARs without sufficient explanation.
Thanks and sorry for the minor thread-drift.
G.
