Apparatus for aircraft pitch trim

Details Apparatus for aircraft pitch trim Apparatus for aircraft pitch trim

1976-03-11

1977-08-23

Blix, Trygve M.

Aeronautics and astronautics

Aircraft control

Rudders and empennage

244 83J, B64C 1330, B64C 910

Patent

active

040435237

ABSTRACT:
Apparatus for providing extreme pitch trim configurations for aircraft capable of flying at low-speeds, and particularly aircraft having blown primary lift-producing surfaces. The apparatus includes a movable horizontal stabilizer to provide pitch trim and an elevator pivotally attached to the horizontal stabilizer to provide transient pitch control. Control of the elevator movement is provided by a control tube extending from a horn attached to the elevator to a bell crank member attached to the horizontal stabilizer. The bell crank is also connected to a push tube movably attached to the airframe and arranged to be aligned with the pivot axis of the horizontal stabilizer in the neutral position. Thus, the horizontal stabilizer may be pivoted around its mounting axis to provide substantial pitch trim while concurrently maintaining the range and symmetry of elevator movement.

REFERENCES:
patent: 3207458 (1965-09-01), Kean

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