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Boulton Paul Lift Fan Designs
- Thread starter hesham
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As well as the fans can I see jet deflection there as well?
Regards,
Barry
Regards,
Barry
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Well at first glance I thought that there was jet deflection there. Studying it a bit more it does seem that it is a contraption that is powering the lift fans (as pipes/shafts go off to the wing and fuselage units) from a large pipe coming off of the engines.
Regards,
Barry
Regards,
Barry
I did some searches and didn't find anything mentioned about the machine. So I thought I'd make a new post, if that is okay.
I was talking with a friend the other day, about aircraft design as you do, talking about why aircraft tend to have dorsal rather than ventral tail fins. I was reminded of this Boulton Paul design that had ventral fins only, and wheels on the end of them. Should surely save weight, not needing a main set of undercarriage legs.
So what information can you share on this machine? thanks. ^_^
I was talking with a friend the other day, about aircraft design as you do, talking about why aircraft tend to have dorsal rather than ventral tail fins. I was reminded of this Boulton Paul design that had ventral fins only, and wheels on the end of them. Should surely save weight, not needing a main set of undercarriage legs.
So what information can you share on this machine? thanks. ^_^
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"Should surely save weight, not needing a main set of undercarriage legs."
this is a concept, that was favoured by the good old Luigi Colani, too, who used it
in quite a number of designs. I don't know any more, where I read about it, but once
there was a report about the credibility of his designs, especially mentioning the concept
of the "symbiosis of fin and main gear", as he called it, too. And IIRC, the result was quite
disappointing : The fins of course would have to be beefed up considerably and in
most cases would have a shape, which would be less than ideal aerodynamically. And
the landing gear itself would be heavier, than necessary, because of the not ideal
load distribution.
this is a concept, that was favoured by the good old Luigi Colani, too, who used it
in quite a number of designs. I don't know any more, where I read about it, but once
there was a report about the credibility of his designs, especially mentioning the concept
of the "symbiosis of fin and main gear", as he called it, too. And IIRC, the result was quite
disappointing : The fins of course would have to be beefed up considerably and in
most cases would have a shape, which would be less than ideal aerodynamically. And
the landing gear itself would be heavier, than necessary, because of the not ideal
load distribution.
Thats the one, thanks for the replies.
I guess if there was any advantage to using fins as landing gear it would be more commonly seen. Being a VTOL design it was a possible option on the P.130 then.
Maybe such a langing gear arrangement would make better sence with an ultralight than a military fighter. not quite the same but a Quickie comes to mind with the main gear on the ends of the canards.
I guess if there was any advantage to using fins as landing gear it would be more commonly seen. Being a VTOL design it was a possible option on the P.130 then.
Maybe such a langing gear arrangement would make better sence with an ultralight than a military fighter. not quite the same but a Quickie comes to mind with the main gear on the ends of the canards.
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Cy-27,
Thank you so much for posting, it looks like the P.135B is the missing link between the P.132-5 and the P.136. The P.136 as illustrated in Kites, Birds & Stuff - Boulton Paul Aircraft by P.D Stemp looks almost identical to the P.135B except is uses 6 x RB.108s mounted in the centre fuselage instead of the Boulton Paul lift-fan system of the P.135B. Based on that the P.135B was probably designed for a pair of Bristol Siddeley Orpheus engines too. Is it possible that the P.135 and P.136 were aimed at the same ER.161T that the Armstrong Whitworth AW.171 was designed to?
Thank you so much for posting, it looks like the P.135B is the missing link between the P.132-5 and the P.136. The P.136 as illustrated in Kites, Birds & Stuff - Boulton Paul Aircraft by P.D Stemp looks almost identical to the P.135B except is uses 6 x RB.108s mounted in the centre fuselage instead of the Boulton Paul lift-fan system of the P.135B. Based on that the P.135B was probably designed for a pair of Bristol Siddeley Orpheus engines too. Is it possible that the P.135 and P.136 were aimed at the same ER.161T that the Armstrong Whitworth AW.171 was designed to?
blackkite
Don't laugh, don't cry, don't even curse, but.....
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blackkite
Don't laugh, don't cry, don't even curse, but.....
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Hi!
http://blog.livedoor.jp/janome_gotyou/archives/cat_136010.html?p=9
So I can see fan drive turbine located under the engines which connected to three fans by shaft ? This fan is not gas drive type?
Also I can see jet deflector under the fans in this drawing.
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=3668.0;attach=44159;image
http://blog.livedoor.jp/janome_gotyou/archives/cat_136010.html?p=9
So I can see fan drive turbine located under the engines which connected to three fans by shaft ? This fan is not gas drive type?
Also I can see jet deflector under the fans in this drawing.
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=3668.0;attach=44159;image
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