Blackburn B.20 pics -Post-1
 

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Blackburn B.20 pics -Post-2
 

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Blackburn B.20 pics -Post-3
 

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You want info on the B.20 (and B.40).....this guy has it and some damm good drawings

http://myspace.virgin.net/john.dell/blackburn_b20.htm

http://myspace.virgin.net/john.dell/blackburn_b40.htm
 
Justo, can you give a explanation for the 3-view, you've posted in #1, please?
Is it an unarmed transport variant, or related to the B.40 (the nose looks similar,
but there's no tail turret) ?
 
A few other views:

B-20.jpg


B-20001.jpg


B-20002.jpg


B-20003.jpg


B-20004.jpg


B-20005.jpg



Chris
 
Thanks a lot for these great pictures, dogsbody! I find the B.20 fascinating.

I would love to know if the concept was used on other built types/prototypes elsewhere, or if the B.20 remains unique.
 
Jemiba said:
If you are speaking of the retractable "boat" in general, have a look at the thread found again by borovik:
http://www.secretprojects.co.uk/forum/index.php/topic,3303.0.html #7.
Another example coming up my mind is the "Universal Long Range Fighter" designed by Portsmouth Aviation,
(http://www.secretprojects.co.uk/forum/index.php/topic,645.msg4869.html#msg4869 #3)

Thanks Jens! The ULRF qualifies perfectly, while the other doesn't. I was looking for aircraft whose hull completely separated and was an integral part of the design (without it, the aircraft would not be able to fly). In the other example, you can see that the float could probably be jettisoned and the design would still be flyable.
 
To my opinion, all those designs just feature a kind of float, that (at least theoretically) could be
jettisoned without influencing the fuselage. Of course, this float probably was often used as fuel
tank and the aerodynamic cleannessmay suffer, but the basic structure should remainOr, in other
words, it should be possible to replace those floats with a kind of wheeled landing gear.
 
Justo Miranda said:
Plase see text
(From "Aircraft Illustrated February 1974"


I believe that this patent drawing is highly likely to be Blackburn project B.B.3. The retractable hull concept was tested by the RAE in water tank and wind tunnel in the summer of 1935 and the work is referenced in Blackburn's tender to R.12/35.
 

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