A service test YP-39 photographed at Buffalo on 16 October 1940.

Самолёты на фотографии: Aircrafts on the photo: Bell P-39 Airacobra - СШАUSA - 1939

A P-39Q with a 0.5-in (12,7-mm) gun beneath each mainplane.

Самолёты на фотографии: Aircrafts on the photo: Bell P-39 Airacobra - СШАUSA - 1939

A general arrangement draw ing of the P-39Q-20-BE with underwing guns omitted.

Самолёты на фотографии: Aircrafts on the photo: Bell P-39 Airacobra - СШАUSA - 1939

One of the three YFM-1B Airacudas

Самолёты на фотографии: Aircrafts on the photo: Bell FM-1 Airacuda - СШАUSA - 1937

One of the trio of YFM-1As that featured tricycle undercarriages.

Самолёты на фотографии: Aircrafts on the photo: Bell FM-1 Airacuda - СШАUSA - 1937

Самолёты на фотографии: Aircrafts on the photo: Bell XFL-1 Airabonita - СШАUSA - 1940