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