n/a
(a) Unless otherwise prescribed, an aircraft must meet the performance requirements of this Subpart in:
(1) still air and standard atmospheric conditions at sea level for all aircraft; and
(2) ambient atmospheric conditions within the operational flight envelope for:
(i) reserved.
(ii) Category Enhanced.
(b) Unless otherwise prescribed, the applicant must develop the performance data required by this Subpart for the following conditions:
(1) vertiport altitudes from sea level to the maximum altitude for which certification is being sought; and
(2) temperatures above and below standard day temperature that are within the range of operating limitations if those temperatures could have a negative effect on performance.
(c) The procedures used for determining take-off and landing area must be executable consistently by flight crew of average skill in atmospheric conditions expected to be encountered in service.
(d) Performance data determined in accordance with VTOL.2105(b) must account for losses due to atmospheric conditions, cooling needs, installation, downwash considerations, and other demands on power sources.
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