F.1.11 Primary Structure Envelope

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Next Rule: F.1.12 Major Structure

A volume enclosed by multiple tangent planes, each of which follows the exact outline of the Primary Structure Frame Members

Explanation

The Primary Structure Envelope is the volume enclosed by the primary structure. This does not include tangent planes going to the wheels.

Previous Rule: F.1.10 Primary Structure

Next Rule: F.1.12 Major Structure