main plane

noun

1. one of the principal supporting surfaces of an aircraft, esp either of the wings
2. both wings considered together

As those on one end rise, those on the other end fall below the level of the main plane.

In the Clarke models with the small front plane, the centre of pressure is slightly in front of the main plane.

Do not construct models (intended for actual flight) with a tractor screw-main plane in front and tail (behind).

There were only small tail lights, one above and one below the main plane, to warn following drivers against collision.

The main plane is twisted, or warped, when banking, much in the same way that the Wright biplane is warped.

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