Hafner Aircraft

hesham

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Hi,

Hafner R.I was single seat helicopter of 1928,followed by R.II of
similar configuration,powered by 40 hp Salmson lightweight radial
engine.AR.III Gyroplane was single seat autogyro powered by one
90 hp Pobjoy Niagara engine,AR.IV was two seat and AR.V was three
seat autogyros projects.Rotachute was a man-carrying glider with a
rotating wing,Rotabuggy was intended as a stepping-stone to a flying
Valentine tank,Rotabank was a glider.
unknown designs were PD.6,PD.7 and EA.115,
and I hear that Hafner submitted a proposal to HR.144T specification
but I am not sure.
 

Maveric

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R. I " Revoplan 1 " Versuchshubschrauber 1929
R. II " Revoplan 2 " Versuchshubschrauber 1932
A.R. III Versuchstragschrauber 1935
A.R. IV Versuchstragschrauber 193
A.R. V Versuchstragschrauber 193
P.D. 6 ( Spec. 10/39 ) Versuchshubschrauber Projekt 1938
P.D. 7 Kampfhubschrauber Projekt 1939
H. 8 " Rotachute " Rotorsegelapparat 1942
H. 9 ( Bristol Type 171 ?? ) Mehrzweckhubschrauber Projekt 1944

" Rotabuggy " Versuchtragschrauber 1942
" Rotatank " Versuchstragschrauber 194

I search for pics and drawings of the AR.III; AR.IV and AR.V.

Regards Maveric
 

dan_inbox

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Maveric said:
I search for pics and drawings of the AR.III; AR.IV and AR.V.

Here is the pic I have of a Hafner AR-III mk2
HafnerAR-IIIMk2Gyroplane1937.jpg
 

richard

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Flight Global is prolific about the A.R. III and Bristol 171

http://www.flightglobal.com/pdfarchive/view/1937/1937%20-%200696.html?search=Hafner%20A.R

http://www.flightglobal.com/pdfarchive/view/1937/1937%20-%202909.html?search=Hafner%20A.R

http://www.flightglobal.com/pdfarchive/view/1939/1939%20-%200039.html?search=Hafner%20A.R

http://www.flightglobal.com/pdfarchive/view/1937/1937%20-%202909.html?search=Hafner%20A.R

About another A.R III ,this copy from Luftsport (?) 1938 :

[/URL
 

JohnF

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Hi
This is my first post and I have a question for you all. The drawing of the 1938 Hafner is it a Short Hafner IV? I have a 3 view silhouette of Experimental Aeroplane #116 which I think is a Short Hafner IV. I don't know how to attach an image. You can see it on my flickr page. My name is airplaneguy38.
Thanks
JohnF

Edit: Picture inserted
 

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Jemiba

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Welcome John,

I took the liberty to insert the mentioned picture into your post, as you cannot
attach pictures, before you've reached 5 posts.
To me it's the same type as posted by richard, but according to Maverics list, it
should be the AR.IV.

BTW, the Hafner P.D.7 is in your collection, too ! ;)
 

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Stargazer2006

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Another, better three-view arrangement of the Hafner AR.IV:
 

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Stargazer2006

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The Hafner PD.6 and PD.7 projects:

“[T]wo helicopter designs in preparation, the P.D.7 is an advanced one, and the smaller one, the P.D. 6, is only an experimental machine. The experimental machine is powered with a Propcher engine, and is a single-seater about the same size as the existing A.R. 3 Gyroplane, and I expect to get 150 miles an hour top speed with it, and about 1500 feet rate of climb, whereas the P.S. 7 machine will be a development from it, and we calculate the maximum speed at 210 miles per hour, which is the maximum permissible speed, because at that speed the advancing tip is already coming very dangerously near the speed of sound. It is other considerations that limit the speed, not the power itself.
The maximum rate of climb of this machine, near the ground, will be 3800 feet per minute.”

From a presentation by Raoul Hafner entitled “The Hafner Gyroplane and Helicopter”
given during a Rotating Wing Aircraft Meeting at The Franklin Institute, Philadelphia, PA, on Oct. 28-29, 1938

First set of illustrations below by J. Gordon Leishman in “The Gyroplanes, Helicopters and Convertiplanes of Raoul Hafner”
Paper presented at the American Helicopter Society Forum 61, Dallas, TX June 1-3, 2005
and reprinted in Proceedings of the American Helicopter Society Forum 61.



Comment of Picture 11 says Hafner made “meticulous calculations of the flow below the rotor [which] showed the effectiveness of using fixed aerodynamic surfaces to counter rotor torque reaction and to give directional control.”




Source: http://vtol.org/8248F800-5DFF-11E2-AB4E0050568D0042
 

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Apophenia

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The designation suffices seem to match engine types. The AR V-N was to be powered by a 425 hp Pobjoy Nile radial (Pobjoy also being intended to build the prototype AR IV and V). From that sideview drawing, I'm guessing that the AR V-G would have been Gipsy Six-powered ... although to match Nile output, a Gipsy Twelve would be more logical :confused:

Does anyone have anymore about that Pobjoy Nile engine?
 

Apophenia

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