As I work my way up among the upper plane, the light ebbs and shadows return.

The upper plane carried long ailerons extending over 70% of the span.

It looked as if the upper plane was dropping.

In plan, both wings were straight tapered; only the upper planes carried ailerons.

Since his daughter floated to the upper plane, he's been looking everywhere for a materialization.

There were ailerons only on the upper plane, the plan, structure and bracing of which was greatly altered during 1923.

The upper plane had a longer span and wider chord than the lower one.

Both wings carried ailerons and the upper planes had leading edge slats.

The absence of ailerons on the upper plane simplified this procedure.

Both wings carried dihedral, the upper plane the most.