Bréguet 410

The Bréguet 410 was a sesquiplane prototype designed by Breguet Aviation in order to meet the requirements of the Technical Aeronautic Service ( Service Technique de L'Aéronautique ) of the French government towards the end of the 1920s, for a bomber and reconnaissance aircraft, which it referred to as Multiplace de Combat.William Green, War Planes of the Second World War: Volume 7

Only one unit of the first variant, the Bréguet 410, was built, which was passed in favour of the competing Amiot 143 despite its combat qualities. Other prototypes, such as the Blériot 137 and the SPCA 30, underwent a similar fate as the Bréguet 410.[http://www.airwar.ru/enc/bww1/spca30.html SPCA 30] Most of its later developments or variants never went past the prototype stage.

The Bréguet 410 was an all-metal sesquiplane biplane bomber; the primary materials from which the fuselage was constructed included high-tensile steel and duralumin.NACA 1932, p. 1. The technical methods of its construction were quite similar to those of the earlier Breguet 270. While typically operated by a crew of three, some combat missions would have been performed using up to five people.NACA 1932, pp. 1-2. The bombardier, who also doubled as the navigator, had a folding seat with a trapdoor directly in front of them; this was used both for aiming or for emergency egress, for which they were provided with a parachute. Some versions of the aircraft were equipped for night flying.NACA 1932, p. 8.

In order to provide favourable fields of fire for the gunners aft of the wing led to the adoption of relatively novel devices. Specifically, the shape of the fuselage is discontinuous in terms of both plan and profile to accommodate a constriction just behind the aft gun ring, which was claimed to considerably increase the position's field of fire, especially downwards. On some later-built versions of the aircraft, a third gun ring was present underneath the fuselage.NACA 1932, pp. 2-3. Glass hoods were typically present around the gun rings.NACA 1932, pp. 7, 8.

The upper wing of the aircraft was directly attached to the top of the fuselage via its steel spars. Each half-wing comprised an elastic aileron/flap close to the fuselage, which increased the effective speed range as well as automatically stabilised the aircraft, as well as a separate differentially-controlled aileron towards the elliptical tip; the latter facilitated the constant application of force to the control stick across different flight speeds as well as increased effectiveness of the ailerons while travelling at low speed. The upper wing had an aspect ratio of nearly nine, which was uncommon for a thin semi-cantilever wing at that time.

The lower wing's structure comprised a single box spar, which was composed of steel, along with two parallel corrugated webs; the leading edge, which was made of duralumin, formed part of the box spar.NACA 1932, p. 2. The leading edges of the ribs consisted of stamped frames of either duralumin or steel, which were placed either in pairs or individually. The web and the covering were joined via reinforcing strips that formed flanges of variable thickness while continuous reinforcing strips of duralumin followed the line of the leading edge inside the girder. The after section of each half-wing had a framework of duralumin ribs, both plain and lattice ribs were used along with circular lightening holds. The trailing edge was attached using pins to the rear girder and closed by an auxiliary spar.

The spar of the lower wing was continuous and formed the main support of the whole structure. This spar directly attached via by steel brackets to various other elements, including steel triangular fuselage supports, tubular steel undercarriage fittings, strut fittings, and the duralumin engine bearers. The undercarriage was equipped with oleopneumatic shock absorbers while brakes were present to help slow the aircraft during landings.NACA 1932, pp. 5, 9. The tail boom, which had a similar structure to that of the lower wing, was attached to the fuselage using four bolts. Both the elevator and rudder were equipped with balancing flaps and were actuated using relatively rigid controls.NACA 1932, pp. 2, 6, 9.

The Bréguet 410 was typically powered by a pair of Hispano-Suiza-built V-12 engines.NACA 1932, p. 3. A water cooling system, which used a large flexible tube, was present.NACA 1932, p. 7. Fuel was stored within two cylindrical fuel tanks located within the lower wing; fuel was supplied to the engine using pumps. If one of these tanks was compromised, both engines could be run from a single tank; fuel management was performed by the pilot.NACA 1932, pp. 2, 7. A fuel dumping mechanism was present, which used pipes present in the wing's trailing edge that connected the tanks. Oil was housed in a tank directly behind the fuel tanks.

The bombs were housed on vertical racks within the fuselage interior.NACA 1932, p. 5.

The sole Bréguet 410 flew in 1931 powered by two Hispano-Suiza 12Nb engines. Developments followed though, with an upgraded and slightly modified version, the Bréguet 411, which flew in 1932. Like its predecessor this Bréguet aircraft was again rejected by the French government.[http://www.airwar.ru/enc/bww1/br410.html Airwar - Breguet 410]

The Bréguet 413 was an improved version, fitted with more powerful Hispano-Suiza 12Ybrs engines. Four units were constructed for the Armée de l'Air, the first one of which flew in February 1933. At least one of these became part of the Escadrille Internationale and was sent to the Spanish Republican Air Force at the beginning of the Civil War in that country, but its fate is unknown.

A further development followed, the Bréguet 414, fitted with Gnome-Rhône 14Kdrs engines and first flew in November 1933. The sole 414 crashed in 1940.[http://www.airwar.ru/enc/bww1/br414.html Airwar - Breguet 414]

The improved Bre 420 first flew on 13 August 1936, but failed to improve performance and handling enough to warrant production.[http://www.airwar.ru/enc/bww1/br420.html Airwar - Breguet 420]

;Bre 410 M4

:Light bomber with two HS12Nb engines (1931)

;Bre 411 M5

:Light bomber with two HS12Nb engines, (1932 - one built).[http://www.secretprojects.co.uk/forum/index.php?topic=9738.0 SP - Avions Bréguet (Br) designations]

;Bre 413

::Light bomber with two HS12Ybrs engines (1933)[http://chezpeps.free.fr/musee/japan/google-japan-france-fichiers-01/breguet-bre-413.jpg Bre 413]

;Bre 413 M4

:Light bomber with two HS12Ybrs engines[http://www.airwar.ru/enc/bww1/br413.html Airwar - Breguet 413]

;Bre 414

:Light bomber with two GR14Kirs radial engines (1933).

;Bre 420

:An improved 414 with modified rear fuselage and tail section.[http://chezpeps.free.fr/musee/japan/google-japan-france-fichiers-01/breguet-bre-420.jpg Bre 414]

File:Breguet 413-f.JPG ]]

;{{flag|France}}

• Armée de l'Air

;{{flag|Spain|1931}}

• Spanish Republican Air Force

File:Breguet 411 M3 3-view NACA-AC-163.png

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{{aircontent

|see also=

|related=

• Breguet 460

|similar aircraft=

• Amiot 143
• Blériot 127
• SAB AB-80
• SPCA 30

|lists=

• List of Interwar military aircraft
• List of aircraft of the Spanish Republican Air Force

}}

{{reflist}}

• {{cite journal |last1 = Cortet |first1 = Pierre |title = Les bimoteurs à "poutre" Breguet 41 |journal = Avions: Toute l'Aéronautique et son histoire |date = August 2000 |issue = 89 |pages = 44–50 |trans-title = The Beamy Twin-engined Breguet 41 |language = fr |issn = 1243-8650}}
• {{cite journal |last1 = Cortet |first1 = Pierre |title = Courrier des Lecteurs |journal = Avions: Toute l'Aéronautique et son histoire |date = October 2000 |issue = 91 |pages = 3–4 |trans-title = Readers' Letters |language = fr |issn = 1243-8650}}
• {{cite journal |last1 = Cortet |first1 = Pierre |title = Rétros du Mois |journal = Avions: Toute l'aéronautique et son histoire |date = February 2000 |issue = 83 |page = 5 |trans-title = Retros of the Month |language = fr |issn = 1243-8650}}
• [https://ntrs.nasa.gov/citations/19930090465 "The Breguet 410 and 411 Military Airplanes (French): Multiplace Sesquiplane Fighters"] National Advisory Committee for Aeronautics, 1 May 1932. NACA-AC-163, 93R19755.

{{commons category}}

• [http://www.aviafrance.com/constructeur.php?ID_CONSTRUCTEUR=249 Breguet]
• [http://www.airwar.ru/enc/bww1/br413.html Airwar - Breguet 413]
• [http://i.ebayimg.com/t/Airplane-BREGUET-multiplace-combat-413-vinatage-color-postacrd-/00/s/MTYwMFgxMjQ4/$(KGrHqVHJEYE88dNCVfvBPU(4K)D6!~~60_35.JPG Postcard - Breguet 413]
• [http://airminded.org/2007/03/07/flying-fortresses/ Flying fortresses]

{{Breguet aircraft}}

Category:1930s French bomber aircraft

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Category:Sesquiplanes

Category:Aircraft first flown in 1931

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