- Prototype Stearman XA-21 on the ground
- Prototype Stearman XA-21 serial 40-191
- Stearman XA-21 40-191 on the ground 3
- Stearman XA-21 40-191 4
- Prototype Stearman XA-21 40-191 in flight 2
- XA-21 with a conventional stepped nose, side view
- XA-21 with a conventional stepped nose
- XA-21 with a conventional stepped nose, front view
- XA-21 rear view
Stearman XA-21 (Model X-100) – prototype twin-engined attack aircraft for United States Army Air Corps.