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Has anyone got Brew's bbok, if that is a fairly definitive source. We need a source that someone has checked for the specs: for example some sources from the 1950s give the tip-less span as 29 ft 9 in, and also a wing area (but tippped or not?) as 200 ft2. Given it was a delta, where is the 10% t/c measured?
Thanks for chasing this. You would think that this area was right; Flight is usually reliable and they are much closer to the time. But: if the wing were a 45 deg delta with no fuselage, the area (unclipped) should just be span2/4 = 281 ft2 with a span of 33.5 ft, and the fuselage, rather wide is going to take a lump out of this. I've just been measuring up a small (2 mm = 1 ft) g/a diagram, unclipped and get about 212 ft2, though I've taken a sort of mean fuselage width whereas it is obviously curved. Still, that's close enough to 200 ft2 to wish for another source.
I also checked the area lost by clipping the tips and estimate about 15 ft2, so that will not account for the 290 -> 200 difference.
TSRL (
talk)
21:18, 3 February 2009 (UTC)reply
The Aeroplane Monthly article I've just added - although it doesn't have a full set of specs, does confirm the length and height, with a clipped span of 25 ft 8 in, a span of 29 ft 8 in with intermediate tips and a maximum span of 33 ft 6 in with the pointy tips.
Nigel Ish (
talk)
22:49, 3 February 2009 (UTC)reply
I'd not realised that there were intermediate tips and that explains the variety of span values: Dessoutter's 1954 book also gives the span as 29.75 ft. Were there just the three configurations? I wonder how often it flew at 25' 8"; in most of the photos it looks less cropped. Saw it once, late 50s Battle of Britain show, somewhere in Cambridgeshire-ish as a surprise guest. Might have been the same show with the S.B. 5 in the static ...
TSRL (
talk)
23:27, 3 February 2009 (UTC)reply
Finally got a copy of Brew and entered his data with detail on the three wing configurations. His areas are large but he is the authority. I still don't see how they can be that large - it is as if the fuselage has been ignored - and there is a matching problem with the root chord he quotes (17' 2.5", bigger than the g/a) but there we are.
TSRL (
talk)
08:57, 3 September 2009 (UTC)reply
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I've removed the comment (also called BP.111), which was cn'd last May. Brew (Boulton & Paul Aicraft, Pitnam) does not say this, nor The Observers Book of Aircraft, nor The Jet Aircraft of the World (Green & Cross). All B&P projects were given a P (project) number according to Brew p.312, eg the
P.82 Defiant.
TSRL (
talk)
13:53, 5 February 2019 (UTC)reply