| Biplane |
| An aeroplane with two pairs of wings set one above the other |
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| Blimp |
| Slang term referring to small airships |
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| Blip, To |
| To switch the aeroplane's engine on and off rapidly |
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| Blower (portable or engine driven) |
| An apparatus for filling balloon or ballonet with air. Sometimes attached to the basket in flights. |
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| Boche |
| A disparaging term for a German |
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| Body |
| That part of the aeroplane which accomodates the engine, pilot, passenger and probably the petrol and oil tanks |
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| Bonnet |
| The appliance having the form of a parasol, which protects the valve of a spherical balloon against rain. |
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| Bounce |
| The upward and forward movement of an aeroplane which has struck the ground without flattening out sufficiently |
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| Brevet |
| A certificate showing that a pilot has passed certain elementary flying tests and my be considered a qualified pilot |
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