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Balliol Airbrakes

Can anyone give me any information on Boulton Paul Balliol Airbrakes?

All I have is a copy of the Pilots Note’s in which there is a simple diagram in which they are shown in their closed position, flush with the wing. I know that they were pneumatic, but did they split into upper and lower sections, or just into a vertical position?

Best wishes,

Martin

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By: 25deg south - 12th May 2006 at 19:41

Thanks very much Brian. I have that article: unfortunately there’s no more in it ref. “Dive brakes”. I do suspect, certainly on the piston Balliols at least, that “air brakes” refers to “dive brakes”. The terms have been mixed up a bit over time but I cannot really see the need for “air brakes ” on a piston propeller aircraft.

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By: Pen Pusher - 12th May 2006 at 18:26

Just check -are they airbrakes or Dive brakes? 🙂

This photo is taken from an article by John Perrott called ‘Airborne in the Balliol’ in Aeroplane Monthly, March 1982. I assume it is dive brake on the upper wing and airbrake on the lower wing.

Brian

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By: Mark V - 12th May 2006 at 17:58

Wouldn’t it be nice to see one on the airshow circuit?

Just what I was thinking – what a lovely aeroplane 🙂

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By: 25deg south - 12th May 2006 at 17:21

Just check -are they airbrakes or Dive brakes? 🙂

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By: T6flyer - 12th May 2006 at 17:09

Martin

Can’t really answer your question but hope this helps and looking at the photos it does appear as if they split top and bottom. Balliol at Cosford.

Brian

Brian,

Thank you so much. Just what I needed. Looking at the photos, I too agree, it does look like they split. Reason I was asking is that a friend is building a version for the Microsoft Simulator and this was the only area in which he was unsure as to the aircraft’s construction.

Thanks once again.

Best wishes,

Martin

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By: mike currill - 12th May 2006 at 16:57

Wouldn’t it be nice to see one on the airshow circuit? Something else for people to ask “will it be at Flying Legends?”

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By: Pen Pusher - 12th May 2006 at 16:53

Martin

Can’t really answer your question but hope this helps and looking at the photos it does appear as if they split top and bottom. Balliol at Cosford.

Brian

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