公开(公告)号：US20200086971A1

公开(公告)日：2020-03-19

申请号：US16131622

申请日：2018-09-14

Applicant: Bell Helicopter Textron Inc.

Inventor： Tjepke Heeringa

IPC: B64C3/38 ,  B64C29/00 ,  B64C5/08

Abstract: Embodiments are directed to adding wing extensions outboard of the engine nacelles on tiltrotor aircraft to increase cruise efficiency. By using pivoting wing extensions, the download penalty during hover operations is decreased because the wing extensions will pivot into the downwash rather than act as a barrier. Freely pivoting wing extensions will align with the local airflow during conversion mode flight, which eliminates flow separation issues. The freely pivoting wing extensions also reduce gust response by rotating out of the way of turbulence and updrafts. A trailing edge trim flap provides simple and effective control of the incidence angle for the free-pivot wing extension.

公开(公告)号：US20200017190A1

公开(公告)日：2020-01-16

申请号：US16033695

申请日：2018-07-12

Applicant: Bell Helicopter Textron Inc.

Inventor： George R. Decker ,  Tjepke Heeringa

IPC: B64C3/18 ,  B64C29/00 ,  B64C3/26

Abstract: A wing is provided in one example embodiment and may include an upper skin portion; a lower skin portion; and a multi-spar element that extends between the upper skin portion and the lower skin portion, wherein the multi-spar element comprises a plurality of spar elements integrated together. The multi-spar element may include at least one spar element that extends between the upper skin portion and the lower skin portion, wherein the at least one spar element is continuously connected along a forward and aft directional axis to at least one other spar element that extends between the upper skin portion and the lower skin portion. The multi-spar element may be attached to the upper skin portion and the lower skin portion.