A mission, a maintenance schedule, and a limit.
Nobody ever issued you the three.
And lift — which only arrives when you fly the mission.
Check the real items. Size them. The airframe reacts.
Shrink a weight. Put down a drag item. Grow the lift.
Watch the same airframe climb.
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The Loads Evaluation — the interactive free body diagram · Worksheet 4B of the 𝑖SIP Companion Workbook