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Hughes XV-9A and related Hot Cycle Projects

Stingray

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Stargazer2006 said:
Goodness gracious me. This is SWEET!!! Thanks a lot for sharing Travis, it's appreciated. Have we seen the end of the brochure? Perhaps now we could turn it into a downloadable PDF?

You're very welcome! Yes, this is the end. I want to apologize for the huge sizes, but most were actually larger when I dug them from my collection. I had to resize specially for upload here.

Thanks, Paul, for the PDF version!
 

Jemiba

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A perspective drawing of the Hughes H-385 from "Der Flieger", December 1964;
 

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hesham

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Very nice drawing my dear Jemiba.
 

jsport

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Jemiba said:
A perspective drawing of the Hughes H-385 from "Der Flieger", December 1964;
WOW, what a find..thank you for sharing.
 

Jemiba

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From "Der Flieger", february 1966, a picture of the layout shown in the very first post
of this thread:
 

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jsport

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Jemiba said:
From "Der Flieger", february 1966, a picture of the layout shown in the very first post
of this thread:
WOW, thanks again, what a find. Makes one sad to see the words Hughs Tool and what could have been though. :(
 

hesham

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My dear Skyblazer,


if you can do it again,and collect those pieces,you will make my day,here is a developments
of Hughes hot-cycle concept;


http://www.dtic.mil/dtic/tr/fulltext/u2/651217.pdf
 

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jsport

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Thank you Dear Hesham for the posting. :)
 

Stargazer2006

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hesham said:
if you can do it again,and collect those pieces,you will make my day
Ah, but I used to have a lot more time on my hands than I have now, unfortunately. The Sikorsky plan was done back in 2012.
Nowadays all the spare time I have goes into my new website, which I have been preparing for several months now...
So, no, I won't be able to "collect the pieces" for the time being, sorry. Maybe someone else can?
 

hesham

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OK my dear Skyblazer,


no problem,maybe someone can help.
 

hesham

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Hi RAP,


looks like Hughes H-350.


http://www.secretprojects.co.uk/forum/index.php/topic,4875.msg230468.html#msg230468
 

hesham

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Hi,

http://archive.aviationweek.com/image/spread/19651115/46/2
 

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Triton

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Source:
https://www.ebay.com/itm/VINTAGE-HUGHES-AIRCRAFT-HELIPLANE-HELICOPTER-CONCEPT-DRAWING-PHOTO/263501640952?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D49917%26meid%3D3407ecb8572c4d2d8b8fb5deb3373135%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D263501621325%26itm%3D263501640952&_trksid=p2047675.c100005.m1851
 

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dan_inbox

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Triton said:
Source:
https://www.ebay.com/itm/VINTAGE-HUGHES-AIRCRAFT-HELIPLANE-HELICOPTER-CONCEPT-DRAWING-PHOTO/263501640952?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D49917%26meid%3D3407ecb8572c4d2d8b8fb5deb3373135%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D263501621325%26itm%3D263501640952&_trksid=p2047675.c100005.m1851
Thanks for this picture. Neat stop-rotor concept.
On the view of the back side, there is a scribbling that looks like "CH-1454". Any idea what it means?
Do we know any designation for this Hughes concept, other than Heliplane?
 

hesham

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Big surprise,

this hot-cycle rotor helicopter was called Hughes Model H-356.

https://apps.dtic.mil/dtic/tr/fulltext/u2/473862.pdf
 

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hesham

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hesham said:
Big surprise,

this hot-cycle rotor helicopter was called Hughes Model H-356.

https://apps.dtic.mil/dtic/tr/fulltext/u2/473862.pdf
Who can collect the pieces.
 

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hesham

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Hi,

here is a Hughes Model-285 Hot-Cycle Rotor System,and maybe this generic helicopter
was early design to use on it.

https://apps.dtic.mil/dtic/tr/fulltext/u2/290285.pdf
 

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hesham

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hesham said:
here is a Hughes Model-285 Hot-Cycle Rotor System,and maybe this generic helicopter
was early design to use on it.

https://apps.dtic.mil/dtic/tr/fulltext/u2/290285.pdf
Maybe it was not generic design and real one;

https://apps.dtic.mil/dtic/tr/fulltext/u2/290286.pdf
 

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Mark Nankivil

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Good Day All -

I bought on EPay the "Proceedings of the 1st National V/STOL Aircraft Symposium" November 3-4, 1965 at Wright-Patterson AFB. One of the subjects was Hughes Hot Cycle design applied to the stopped rotor/wing concept. A few drawings attached. For the drawing of the rotor model components, Hughes looked at the hub being triangular, circular and trisector plus different airfoil shapes so each hub shape is a standalone.
 

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sferrin

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It was always a mystery to me what kind of seals they were using to prevent gas leakage.
 

taildragger

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It was always a mystery to me what kind of seals they were using to prevent gas leakage.
It probably wasn't a great challenge, Fairey had faced the same problem years before on the Rotodyne and apparently found a solution. Sealing a pressure vessel around a rotating shaft had been done for decades on steam turbine installations with labyrinth seals - I'd guess something similar was used for hot-cycle rotor systems.
 

sferrin

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It was always a mystery to me what kind of seals they were using to prevent gas leakage.
It probably wasn't a great challenge, Fairey had faced the same problem years before on the Rotodyne and apparently found a solution. Sealing a pressure vessel around a rotating shaft had been done for decades on steam turbine installations with labyrinth seals - I'd guess something similar was used for hot-cycle rotor systems.
Yeah, but not at 1500 degrees.
 

taildragger

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Yeah, but not at 1500 degrees.
[/QUOTE]
Superheated steam can get pretty hot - 1000 degree F or so in a 1200 PsiG plant - and I don't know of any temperature limitation on labyrinth seals other than that of the material they're constructed of.
 

hesham

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Think you may be interested in this, featured in UK comic "The Eagle" in the 60's.
Welcome aboard Ray,very nice,and what was the magazine's name,"The Eagle" ?.
 

yasotay

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Great stuff Ray. Thank You and welcome aboard.
 

asiscan

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Pretty sure NASA contemplated a design based on the Hughes concept in the early 90's using a large circular hub fairing and short large chord blades. Think it went under the title of M85 due to cruise mach goal of 0.85.
 
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