Denhaut & Bellanger-Denhaut Aircraft & Projects

[hesham]

Hi,


Mr. Francois Denhaut was a great French designer,he worked for many
companies and also he had his own firm,he designed with Bellanger
many projects;


1- single-engined four seat tourist biplane project of 1919.
2- twin-engined flying boat biplane project.
3- twin-engined Amphibian biplane project.
4- two seat glider biplane,actually built.
5- four-engined submersible biplane project,(I translate it by my self,but not sure).


Also in 1930,he designed a three engined torpedo bomber flying boat project,
intended to compete in 1930 contest.


The aircraft actually built by Bellanger-Denhaut was the BD.22 flying boat.


Source; Francois Denhaut createur d'Hydravions

 

[Stargazer]

Very very nice! Thanks a lot for sharing these great flying boat designs.

The use of the word "surmarin" came as a surprise to me, I'd never heard it before. It was the exact equivalent of the English "supermarine", a word that was briefly used in the early days of aviation to describe a flying boat, until it became the name of a company.

 

[hesham]

Thank you for info Stargazer.

 

[lark]

Good find . Thanks.

 

[Stargazer]

Not a project, but not very well known, the Denhaut Hy.479 flying boat:

 

[Stargazer]

Unidentified Bellanger-Denhaut flying boats:

 

[Stargazer]

Unidentified Donnet-Denhaut flying boat:

 

[hesham]

Unidentified Bellanger-Denhaut flying boats:

That aircraft was Bellanger-Denhaut BD.22.

 

[hesham]

Unidentified Donnet-Denhaut flying boat:

Also this was Donnet-Denhaut DD.2.

 

[Stargazer]

this was Donnet-Denhaut DD.2.

Thanks!

That aircraft was Bellanger-Denhaut BD.22.

Are you sure these are not two different types? Front of the hull looks different...

 

[hesham]

Yes,you are right,


may be it was DD.9,which was also fitted with 300 hp engines,

 

[hesham]

Hi,


also he designed in 1919,a four engined long range flying boat project.

 

[hesham]

Hi,


also in the report,he designed an amphibian,tourist and a flying boat projects until 1940s,
but no drawings was survivor.

 

[hesham]

Hi,


here is a patent for Denhaut early flying boat.


http://retroplanes.free.fr/photo/Courrier%2035%20A5.pdf

 

[hesham]

What was Bellanger N.12 ?;

http://www.avia-it.com/act/biblioteca/periodici/PDF%20Riviste/Aeronautica/L'Aeronautica%201929%20011.pdf

 

[hesham]

From Avions magazine;

DD.1 was a 80 hp Le Rhone engined single seat flying boat
DD.2 was a 160 hp Canton-Unne engined two-seat anti-submarine flying boat
DD.3 was a 140/150 hp HS two-seat flying boat biplane
DD.4 was a 160 hp Lorraine engined two-seat flying boat biplane
DD.5 ------?

 

[hesham]

Also from the same source;

DD.6 was a 200 hp HS engined two-seat high speed recce flying boat
DD.7 was a 200 hp HS engined three-seat bomber and maritime flying boat
DD.8 was a 200 hp HS engined two-seat bomber flying boat
DD.9 was a 275 hp HS engined three-seat combat biplane flying boat
DD.10 was a 400 hp HS twin engined patrol flying boat

 

[Maveric]

Do you have Pictures?

 

[hesham]

Do you have Pictures?

Yes,but tomorrow.

 

[hesham]

Do you have Pictures?

Hi,

 

[hesham]

From TU issue 211,

there was anther Project for tourist airplane,powered by one 150 hp engine,and had
a retractable landing gear.

 

[toura]

hi all
look

 

[Avimimus]

Hi,

Source?

 

[hesham]

hi all
look

Yes my dear Toura,

we know it from long time,but this Project is new,and not mentioned in this report.

 

[toura]

Avimimus
Sorry, i'm not able to remenber !!!

 

[hesham]

From Avions magazine;

DD.1 was a 80 hp Le Rhone engined single seat flying boat
DD.2 was a 160 hp Canton-Unne engined two-seat anti-submarine flying boat
DD.3 was a 140/150 hp HS two-seat flying boat biplane
DD.4 was a 160 hp Lorraine engined two-seat flying boat biplane
DD.5 ------?

From TU 205 magazine,maybe this one was DD.5;

- was a 230 hp Lorraine engine flying boat,one aircraft was built.

 

[hesham]

From TU 211,

maybe there was anther Project for torpedo bomber from 1932,rather than the
Project of 1930 ?.

 

[Aubi]

Hi everybody, first time posting here.
That article from Avions no.89 claims some ten variants Donnet-Denhaut flying boats, but only four of them got standard name - DD.2, DD.8, DD.9 and DD.10. All others DD numbers mentioned by Hesham are designations "invented" or proposed by the author of the article who tried to explain the difference. Designations in the DD line were assigned retroactively, after the war. Known variants according to that article are (names as used by the French navy):

1) unnamed prototype from 1915, powered by 80 hp Le Rhone engine; retroactively named DD.1
2) Donnet-Denhaut Canton Unné 160 hp - 36 (or 90?) machines from the first series; retroactively named DD.2
3) Donnet-Denhaut Hispano-Suiza 140/150 hp - second series, minor differences given by new engine; some 195 ordered, older sources claim 365, presumably including latter variants with Lorraine engines; also designated as DD.2,
4) Donnet-Denhaut Lorraine 160 hp - larger wings, new engine; 130 ordered
5) Donnet-Denhaut Hispano-Suiza 200 hp Reconnaissance Rapide - basically just DD 150 hp with new engine; 65 machines
6) Donnet-Denhaut Hispano-Suiza 200 hp biplace (or bombardement) - basically just DD 160 hp Lorraine with new engine, around 500 built; retroactively named DD.8
7) Donnet-Denhaut Hispano-Suiza 200 hp triplace - similar to 200 hp biplace, another gunner behind the wings, twin machine guns; used around the Dunkirk areaby the French and the US Navy; 100 (80?) ordered; retroactively named DD.9
8) Donnet-Denhaut Lorraine 230 hp - similar to 200 hp biplace, engine with four-bladed propeller, prototype only
9) Donnet-Denhaut Hispano-Suiza 275 hp - verry different plane with equal-span wings, new tail, armament as 200 hp triplace; 30 ordered just after the Armistice, most used by the machine gunners school at Hourtin
10) Donnet-Denhaut Hispano Suiza 400 hp bimoteur or Donnet-Denhaut BM - large twin-engined patrol seaplane for high seas, 200 hp engines mouned in tandem; 30 ordered, most probably never delivered due to the Armistice, DD.10

For me, mystery machines are the Donnet-Percherons, the P.10 and P.15. Le Fana de l'Aviation 1987/03 claims they were built as prototypes but never flown, but I didnt found any other info.

 

[hesham]

Welcome aboard Aubi,

and thank you for this Info,about Donnet-Percheron,here is more Info.

 

[hesham]

From Aviation magazine 1970,

all activities to Denhaut.

 

[burunduk]

Hi, colleagues!

May be you have a photo or a sketch of the Donne-Denhaut P.15 flying boat? I'd be very grateful.

 

[hesham]

Hi, colleagues!

May be you have a photo or a sketch of the Donne-Denhaut P.15 flying boat? I'd be very grateful.

Hard to find dear Burunduk.

 

[hesham]

From TU 193.

 

[hesham]

What was Bellanger N.12 ?;

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May that is unknown project or for Bellanger,or developed from BD.22,but the designation was wrong.

 

[Apophenia]

May[be] that is unknown project or for Bellanger,or developed from BD.22,but the designation was wrong.

Dimensions are identical but the 1929 N.12 is seven years latter. Perhaps an attempt to extend the lifespan of the BD.22s which were retired by the Aéronavale in 1928? Interesting that this was the year that Hispano-Suiza's 12N engine also first appeared.

So, perhaps new engines dictated that N.12 designation? (The letter and cylinder number orders of HS engine designations did tend to jump around.) Of course, this assumes that your specs don't refer to total horsepower. Still, quite a jump for one airframe design to go from 2 x 260 hp engines up to 2 x 600 hp powerplants!

 

[hesham]

What was Bellanger N.12 ?;

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Later,I will talk about Bellanger list.

 

[hesham]

Later,I will talk about Bellanger list.

For Bellanger,and after Denahut left Donnet and joined him,he had strange system,he at first
completed Denahut series,but he had also his sequence for the same aircraft as seen,

1919 was a tourist biplane,powered by one 150 hp engine,project,BD.16 ? or N.1 ?
1919 was another tourist biplane,powered by one 325 hp engine,project,BD.17 ? or N.2 ?
1919 was a four engined high-mer biplane flying boat,powered by four 400 hp engines,project BD.18 ? or N.3 ?
1919/20 was a twin engned biplane flying boat project,powere by two 300 hp engines,BD.19 ? or N.4 ?
1919/20 was an amphibian version of above,powered by the same engines,BD.20 ? or
N.5 ?
B.21 ? or HB.1 Bille was a variable incidence wing airplane,as a two-seat biplane,powered by one 130 hp Clerget engine or N.6 ?
1922 BD.22 was an unequal span biplane reconnaissance and bomber flying boat,powered by two 260 hp Hispano-Suiza 8 Fd V-8 engines or N.7 ?
1922 BD.23 ? was a biplane glider,capable of accommodating a small engine or N.8 ?
1923/24 HB.3 was a military version of BD.22,may it was BD.24 ? or N.9 ?
N.10 ------?
N.11 ------?
N.12 may it was a developed version of BD.22,project,powered by two 600 hp Hispano-Suiza engines

- That's only my speculations about the designations "N".