Dewoitine D.521

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Název:
Name: 		Dewoitine D.521 Dewoitine D.521
Originální název:
Original Name: 		Dewoitine D.521
Kategorie:
Category: 		stíhací letoun fighter aeroplane
Výrobce:
Producer:		 DD.MM.1940-DD.02.1940 Société Nationale des Constructions Aéronautiques du Midi, Toulouse /
Období výroby:
Production Period: 		DD.MM.1940-DD.02.1940
Vyrobeno kusů:
Number of Produced: 		1 (41. sériový letoun D.520 byl upraven do podoby D.521)
První vzlet:
Maiden Flight: 		09.02.1940
Osádka:
Crew: 		1
Základní charakteristika:
Basic Characteristics:		 
Vzlet a přistání:
Take-off and Landing: 		CTOL - konvenční vzlet a přistání CTOL - conventional take-off and landing
Uspořádání křídla:
Arrangement of Wing: 		jednoplošník monoplane
Uspořádání letounu:
Aircraft Concept: 		klasické conventional
Podvozek:
Undercarriage:		 zatahovací retractable
Přistávací zařízení:
Landing Gear:		 kola wheels
Technické údaje:
Technical Data: 		 
Hmotnost prázdného letounu:
Empty Weight: 		2156 kg 4753 lb
Vzletová hmotnost:
Take-off Weight: 		2760 kg 6085 lb
Maximální vzletová hmotnost:
Maximum Take-off Weight: 		2835 kg 6250 lb
Rozpětí:
Wingspan: 		10,200 m 33ft 5,56in
Délka:
Length: 		8,760 m 28ft 8,87in
Výška:
Height: 		3,430 m 11ft 3,03in
Plocha křídla:
Wing Area: 		15,97 m2 171.9 ft2
Plošné zatížení:
Wing Loading: 		172,82 kg/m2 35.4 lb/ft2
Pohon:
Propulsion:		 
Kategorie:
Category:		 pístový piston
Počet motorů:
Number of Engines:		 1
Typ:
Type:		 Rolls-Royce Merlin III, kapalinou chlazený přeplňovaný dvanáctiválec s válci do V o výkonu 775 kW v h= 1 680 m.
Vrtule trojlistá de Havilland s konstantní rychlostí otáček 		Rolls-Royce Merlin III, twelve-cylinders, supercharged, liquid-cooled, 60° "Vee", engine rated 1,030 hp at 5,500 ft,
driving three blade de Havilland constand-speed propeller
Objem palivových nádrží:
Fuel Tank Capacity: 		? ?
Výkony:
Performance: 		 
Maximální rychlost:
Maximum Speed: 		570 km/h v 6100 m 354.2 mph in 20013 ft
Cestovní rychlost:
Cruise Speed: 		495 km/h v 4575 m 307.6 mph in 15010 ft
Rychlost stoupání:
Climb Rate: 		? m/s ? ft/min
Čas výstupu na výšku:
Time to Climb to: 		? min do ? m ? min to ? ft
Operační dostup:
Service Ceiling: 		11500 m 37730 ft
Dolet:
Range: 		850 km 528.2 mi
Maximální dolet:
Maximum Range: 		? km ? mi
Výzbroj:
Armament: 		2x pevný kanón Hispano-Suiza HS-404 ráže 20 mm v křídlech, 60 granátů pro každý a
2x pevný kulomet MAC 1934 M39 ráže 7,5 mm v křídlech, 675 nábojů pro každý.		 Two fixed forward-firing 0,79 inch Hispano-Suiza HS-404 cannons in the wings (60 rpg) and
two fixed forward-firing 0.295 inch MAC 1934 M39 machine guns in the wings, 675 round each
Uživatelské státy:
User States: 		- -
Poznámka:
Note: 		41. sáriový letoun Dewoitine D.520 byl uoraven do podoby prototypu D.521, M. Doret s tímto letounem poprvé vzlétl dne 9. února 1940. Stroj byl v důsledku posunu těžiště směrově nestabilní, během dalších testů s ním pilot Leopold Galy dosáhl rychlosti 570 km/h. Poslední (sedmý) let uskutečnil Marcel Doret dne 23. března, letoun byl zpětně přestavěn do podoby D.524. The D.521 was a variant of the basic Dewoitine D.520 that would have been powered by a Rolls Royce Merlin III engine. The idea was first suggested in October 1939, but work did not begin in earnest until early 1940. This variant was developed by SNCAM. The first prototype (modified from D.520 No. 41) flew on 9 February 1940. During its seven test flights, the D.521 demonstrated a superior rate of climb and a top speed of 352 mph at altitude. After its last test flight on 23 March 1940 the D.521 prototype was returned to the D.524 prototype.
Zdroje:
Sources: 		Bartoloiej Belcarz, Dewoitine D 520, Mushroom Model Magazine Special No. 6115, Yellow series, ISBN 83-89450-09-7
Alain Pelletier, Squadron/Signal, Aircraft Number 180, French Fighters of World War II.
www.aviafrance.com
www.historyofwar.org
archiv autora

Dewoitine D.521 -


URL : https://www.valka.cz/Dewoitine-D-521-t35575#131556 Version : 0
Dewoitine D.521


Brief History:
The French Air Force was concerned about the possible cessation of supplies of Hispano-Suiza 12Y-45 engines, so sometime in November 1939 came a proposal to mass production from the 251st machine type Dewoitine D.520 for type D.521, which was to be powered by a British engine Rolls-Royce Merlin III with an output of 1,030 horsepower. The project was immediately canceled, but sometime in late 1939, these works were resumed. The production aircraft was withdrawn from production D.520 C.1 and into this machine was built into the said engine. Adjustments continued relatively quickly that on February 9, 1940, the aircraft could be flown, but the Merlin engine was heavier, which shifted the center of gravity (the aircraft was heavy on the head) and lost directional stability.
Several (7?) Test flights were performed and the project was stopped. In the end, there was also a shortage of Merlins in France, so the D.521 returned to the workshop, where another engine was given, this time the French Hispano-Suiza 12Z with an output of 1,200 horses. Thus, type D.521 ceased to exist and became Dewoitine D.524. The planned armament was to consist of two cannons Hispano HS-404 caliber 20 mm and two machine guns MAC 1934 M39 caliber 7.5 mm, all in the wings in an unsynchronized design. The whole project could be considered "What if", because the Merlin engines went preferentially to the Amiot factory for the production of bombers.
URL : https://www.valka.cz/Dewoitine-D-521-t35575#131557 Version : 0
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