Hurel-Dubois Projects

[hesham]

From Ailes 21/4/1961.

 

[hesham]

From Ailes 27/10/1961.

 

[hesham]

From Ailes 19/1/1962.

 

[hesham]

From Aviation magazine 1954,

they mentioned HD.100 in article about HD.10,maybe a misprint,right ?.

 

[hesham]

From Intrado 1981,

here is a Model for HD-45,and a hint about HD-21 ?.

 

[hesham]

From Aviation magazine,

the HD-40 & HD-41.

 

[Jemiba]

... and a hint about HD-21 ?.

I think no ! Couldn't find a clue about a HD-2x , not even in TdU 151. And according to that article, the "HD-21" must have
been a type, which actually was built and flown, because it's flight characteristics were known.
To my opinion, the most probable explanation, is either a typo in "HD-321", or maybe the usage of the shorter "..21", instead
of "321" in the daily language, as princiaplly all HD types then were HD-3xx.

 

[hesham]

I think you are right my dear Jemiba,

maybe a misprint to HD-31 ?,but for HD-20,it was mentioned in Onera Archive without any details;

https://www.secretprojects.co.uk/threads/hurel-dubois-designations.15979/#post-372660

 

[Caravellarella]

Teamed with Sud Aviation Hurel-Dubois perhaps came quite near a
real production contract with the SAHD-120, as a contender for a
tactical transport, that eventually saw the Transall as the winner.

The SAHD 120 looks like a Transall with a typical HD-wing.

I wonder if there are better quality drawings of the SAHD-120; it would be so much fun to convert a Transall model kit into one?

Terry (Caravellarella)

 

[hesham]

From Inter avia 1954.

 

[hesham]

With T-tail,

https://twitter.com/x/status/1526863893007679488

View: https://twitter.com/aviationmarlene/status/1526863893007679488?s=12&t=Tz3-4dgx55M0dW3Ky912yg

 

[hesham]

Hi,

https://www.key.aero/article/hurel-dubois-aircraft-and-their-pioneering-long-wings

 

[hesham]

Hi,

https://www.todocoleccion.net/cromo...-45-ediciones-ruiz-romero-ano-1959~x400530274

 

[Stargazer]

Period ads...

 

[hesham]

From Aviation magazine 15-5-1985

 

[elsiniestro]

I've been researching this type of aircraft, but I don't see many advantages. I think they just add a little extra performance to really poor fuselages. Could anyone tell me the benefits of this type of wing? I don't think the designer knew how to make the most of it.

 

[elsiniestro]

Period ads...

View attachment 726113
View attachment 726114

Is it just marketing? I don't think any of their manufactured models showed superiority in almost any area—I mean, a significant difference.

 

[dan_inbox]

I've been researching this type of aircraft, but I don't see many advantages. I think they just add a little extra performance to really poor fuselages. Could anyone tell me the benefits of this type of wing?

High aspect ratio wings are very good at low speeds. Have low stall speeds too.
Why do you think that most gliders have very high aspect ratio wings?

No they aren't all wrong and it isn't "just marketing". Just look up: High aspect ratio wings.

 

[elsiniestro]

High aspect ratio wings are very good at low speeds. Have low stall speeds too.
Why do you think that most gliders have very high aspect ratio wings?

No they aren't all wrong and it isn't "just marketing". Just look up: High aspect ratio wings.

Review the specifications of your existing aircraft and compare them with the competition. It never had a significant advantage; that type of wing on commercial aircraft isn't worth changing airport infrastructure simply to gain 5 to 10 percent in efficiency.

Large-format wings work well, but did they really show anything worthwhile in their model aircraft?

 

[hesham]

From L'Air 1952.

 

[hesham]

From this PDF.

 

[hesham]

From Aeroplane 1959

 

[hesham]

From JAWA 1964-1965