The P.B.31E Nighthawk, the first project of the Pemberton-Billing operation after it became Supermarine Aviation Works Ltd., was a prototype anti-Zeppelin fighter with a crew of three to five and an intended endurance of 9–18 hours. It was first flown in February 1917 with Clifford Prodger at the controls.
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| loaded weight main |
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| more performance |
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| power main |
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| First Flight |
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| jet or prop? |
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| plane or copter? |
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| abstract |
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