Lockheed C-5 Galaxy Operations Limits Practice Test

The high altitude penetration shall not be initiated at gross weight of which value?

550,000 pounds 650,000 pounds 600,000 pounds 700,000 pounds

Correct Answer:

600,000 pounds

Explanation:

High altitude penetration requires enough energy and performance margin to reach and hold the target altitude safely. As aircraft gross weight increases, climb capability and acceleration degrade, and stall margins shrink. There is a weight threshold beyond which initiating the high altitude penetration would leave insufficient performance to complete the maneuver safely. That threshold is 600,000 pounds, so you should not begin the high altitude penetration at that weight. Lighter weights (below 600,000 pounds) may be considered for initiation under the applicable conditions, while weights at or above this limit are not authorized to start the maneuver.

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