| Forced Landing |
| The action of an aeroplane in coming to earth other than at the will of the pilot |
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| Forumite |
| One who frequently reads and/or posts messages in The Aerodrome Forum |
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| Fug |
| A heavy, stale atmosphere, especially the musty air of an overcrowded or poorly ventilated room such as an RFC mess (in which, we are told, the windows were never opened, even in summer, because pilots treasured being warm).
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| Fug-boots |
| Vulgar British term for the leather, thigh-length boots that pilots sometimes wore. |
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| Fuselage |
| The body of a tractor aeroplane |
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| Gap |
| The distance between the upper and lower wings of a biplane |
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| Gas Bag |
| Slang term for airships |
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| Gazetted |
| Announced or published in The London Gazette |
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| Gimper |
| A bird who won't quit |
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| Harry Tate |
| Nickname for the British R.E.8 |
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