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Bréguet flying boat projects and prototypes

J

joncarrfarrelly

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Sandi,
Breguet had four designs for the '40 tonne' program of 1936.

770-four radial
771-six inline
780-six radial
781-four inline


Cheers, Jon
 

Jemiba

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From Cuny, "Les Avions Breguet":
- Br.732
- Br.831
- Br.1000/1001
 

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Skybolt

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Yes, but Breguet during the war had some really COLOSSAL designs.... Jem, you know what I mean...
 

Jemiba

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Justo Miranda

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French coastal-recce flying boat prototype

sources
-http://www.the-blueprints.com/blueprints/modernplanes/modern-bm-bz/18035/view/breguet_br-790_nautilus/
-http://ww2photo.mimerswell.com/air/fr/breguet/790.htm
 

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Tophe

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Designed in 1935, the Br 710 was 3-engined with Gnôme-Rhone 9 Kers of 450 hp and a gull wing. Its goal was transporting 32 passengers over the Mediterranean Sea. It could be transformed in airline flying-boat”.
What amazed me is that the profile seems to show 2-engined on the port wing, so… (?) only one engine on the starboard wing, asymmetrically? Wow! I hope this is the funny truth. I fear a less uncommon explanation would be that: the standard 710 would be 3-engined with a nose engine (unknown aspect) while the flying-boat derivative was 4-engined (see profile). Too bad.
 

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toura

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HI tophe
I see at "http://aerophile.over-blog.com" the same plane
but with 2 tails.........
Is not the four engines derivative of the Br 710 project, the Br 750 ?
Bye
 

Tophe

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hesham said:
and Br.730 for transatlantic attemp;
http://www.hydroretro.net/etudegh/vers_les_sommets_breguet_1918-1939.pdf
A different version, unbuilt, of the Br.730 (scanned together with the 710). The main obvious difference with the built 730 is external floats with 2 pylons each.
 

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lark

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An excellent series of documenation Tophe.Thanks!
 

Tophe

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toura said:
I see at "http://aerophile.over-blog.com" the same plane
but with 2 tails.........
Is not the four engines derivative of the Br 710 project, the Br 750 ?
According to the index in the Trait d'Union #172, the 750 had also 3 engines... The mystery stays alive, yes!
(Hyd. anf hydravion mean flying boat, trois means 3, croisière means cruise)
 

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toura

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My dear Tophe
Here, on page 58 of this rubric, on page 1 of
"Bristish and French passengers flying boats projects"
Jemiba show a 3 views drawing of the "Breguet 1000"
What are differences between this drawing and your
"Br 870" ? With my thanks Bye.
 

Tophe

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Uh... the drawing is exactly the same, almost.
The Trait d'Union's one seems to be a manufacturer design, while Jemiba's one (at http://www.secretprojects.co.uk/forum/index.php/topic,1575.0.html thanks for the precise direction) is signed JMC, for Jean-Marie Cuny I think (author of the Docavia book), and is the same improved (by an historian) to be complete with the second half complete.

I am not an expert on the subject, I can simply translate Charles Claveau's text in the Trait d'Union #172:

Bréguet 870 and 871: “Stratospheric” aircraft (of which the Br 1011 and 1012 would have been flying scale models), the Br 870 and Br 871 should carry 60 to 80 passengers on 5,000 to 6,000km. Studied from 1944, they used 6 Arsenal 12H engines of 1,500hp, or 4 Arsenal 24H of 2,500hp, or 4 Hispano-Suiza 24Z of 2,500hp. With a span of 50.8m, they would weigh 90 to 100t at take-off.[PS. I see not a word about this 870 to be a flying boat, despite the drawing…]

Bréguet 1000 and 1001, 60 tons flying-boat : after armistice 1940, the Bréguet design bureau designed a stratospheric transport, transatlantic, monoplane of 60t, transporting 24 passengers and 8 crew members. Named Br 1000, it was powered by 6 groups of two Hispano 12Z or 12Y45 engines in tandem driving coaxial propellers. A version with only 4 groups was considered with the name Br 1001. With about the same range and weight as the Br 1000, the Br 1001 had a maximum speed decrease from 620km/h to 450. [PS. Up to here, no word about being a flying boat] With the same wing and engines as the Br 1000, the Bréguet design bureau imagined a stratospheric flying boat of 60t. This project has been soon cancelled.

Conclusion: the drawing of both 1000 and 870 seems none of them but the 60 ton flying-boat with no name, using the wing and engines of the Br 1000… Thanks Toura to have made me read that all and clarify.
 

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For comparison the drawing from Cunys "Les Avions Breguet":
 

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Tophe

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I was ready to send them from Trait d'Union also, they are not the same as above but different ones, not marine I think (I am not sure):
 

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toura

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Hi all
A third version of the "Nautilus" with a single tail has been built
Span : 17 m
lenght : 12.64 m
weigh (empty) 2.665 kgs
(full) 3.500 kgs
speed : 303 km/h
2 construct and 1 flying in november 1939
Bye
 

Tophe

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Tophe said:
The 3-view drawings of projects in Trait d’Union #172 are Bréguet:
792 (2-engine flying boat, 1940)
For Silencer1, here is the Bréguet Br 792 project, version of Br 790 with 2 Béarn engines of 350hp, for A62 program of reco seaplanes on ships. Never built.
 

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Silencer1

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Hi Tophe!

There were some common in his shape with other Bregeut's boats of the period, although small dimensions made this aircraft... not very aestetic 9-)

Grand merci!
 

Tophe

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Tophe said:
The 3-view drawings of projects in Trait d’Union #172 are Bréguet:
731 single-fin and twin-fin variants (4-engine flying boats 1937), 732 (4-engine flying boat 1940)
Some more, still with the same shape almost:
 

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Tophe

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Tophe said:
The 3-view drawings of projects in Trait d’Union #172 are Bréguet:
741 (4-engine flying boat)
This Br741, unbuilt, was a derivative of the Br740 which was a derivative of the Br730. The 741 had a hull special to increase speed, more powerful engines and strengthened wing in 1941-42.
 

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Grey Havoc

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Tophe said:
Tophe said:
The 3-view drawings of projects in Trait d’Union #172 are Bréguet:
P1 glider, P2 glider, other glider with hull
sea-glider, 1941:

Any idea what, or who, the sea-glider was intended for?
 

hesham

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Hi,


very strange,in 1937 competition for two/three seat trainer seaplane or flying boat (A.49),the
main tenders were; Potez-SNCAN 180,FBA-350,Minie-Cassin MR.10,Dewoitine (SNCAM)
HD.740,SNCAO CAO.30,SNCASE SE.400 and Breguet Br.790,that's which I found it
in many sources,but I also read that,the Breguet Br.790 was submitted to Spec. A.46
for three seat surveillance and observation flying boat.


Now I am confuse,was the Breguet Br.790 involved in A.46 or A.49 ?,or submitted to both
of them ?.
 

hesham

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Le Fana 317,

here is a Model for Breguet Br.792 Project.
 

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Jemiba

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Skybolt probably meant the Br.850/851, which would not only have been really big, but also a continous joy for
the producers of the Hispano HS-12Z engine. The 850 should have had 28 of them, the 851 120 !
(Drawing from Docavia 6 "Les Avions Breguet")
 

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hesham

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Hi,

the Bregeut Br.510 was a 16-ton transatlantic sesquiplane flying boat Project for 1928,powered by four 650 hp Hispano-Suiza 12 Nbr engines,and had a wingspan of 35m and length 20m,designed carried out by the engineer Leduc,later developed into Bréguct-Bizerte,not related to postwar Br.510 Colmar.
 
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