View source for DAR 10

{{Use dmy dates|date=April 2022}}
{{Infobox aircraft
|name = DAR 10
|image = Dar10.jpg
|caption = 
|type = [[Light bomber]] and [[reconnaissance]]	 
|manufacturer = Darzhavna Aeroplanna Rabotilnitsa
|designer = 
|first_flight = July 1941 
|introduction = 	 
|retired = 
|produced = 
|number_built =	2
|status = Prototype
|unit cost = 
|primary_user = [[Bulgarian Air Force]] 	 
|more_users = 
|developed_from = 
|variants = 	 
}}
The '''DAR 10''' (ДАР 10) was a Bulgarian [[light bomber]] and [[reconnaissance]] aircraft. DAR-10 was designed for horizontal and dive bombing, reconnaissance, and ground attack.

==Design and development==
The DAR 10 was designed by Zvetan Lazarov in 1938 in the DAR (''[[Darzhavna Aeroplanna Rabotilnitsa]]'', meaning literally 'State Airplane Workshop') factory in [[Bozhurishte]], near the capital [[Sofia]].

The DAR 10 was a single-engine two-seat (pilot and gunner) low-wing [[cantilever]] monoplane aircraft of conventional layout.  Its two seats were in tandem under enclosed glazing.  Its [[Conventional landing gear|tailwheel undercarriage]] was fixed, and the mainwheels were [[Aircraft fairing|spatted]].  The wings had a wooden structure, covered with [[plywood]].  [[Flap (aircraft)|Flaps]] were not used.

The [[fuselage]] was comparatively wide and deep, to accommodate the nose-mounted [[radial engine]].  It was constructed of steel-tube framework and wood formers, covered with fabric.

Three-bladed steel propellers were used.

Two prototypes were built, powered by different engines:
*'''DAR 10A ''Bekas''''' ([[Bulgarian language|Bulgarian]]: "[[snipe]]"), powered by an [[Alfa Romeo 125#Alfa Romeo 128 RC.21|Alfa Romeo 128 R.C.21 nine-cylinder radial engine]] rated at 950&nbsp;hp (709&nbsp;kW).  This was the first DAR 10 to fly, on 2 July 1941.<ref name="Bernad p29">Bernád 2001, p.29.</ref> It was designed to carry four machine guns (two fixed forward-firing and two in rear gunner position).  It could carry five 100-kg bombs, mounted under the wings.  There was also the possibility of a fixed 20&nbsp;mm forward-firing cannon installation in the forward fuselage.

This aircraft crashed in October 1942.<ref name="Bernad p29"/> In spite of good flight reviews, the type was not chosen for production.  The high-wing [[KB-11 Fazan]] was selected for production instead.

*'''DAR 10F''' (the "F" to indicate its Fiat engine), powered by a [[Fiat A.74|Fiat A 74 R.C.38 14-cylinder radial engine]] rated at 870&nbsp;hp (649&nbsp;kW).  This aircraft first flew in March 1945.<ref name="Bernad p29"/> It was slightly heavier and longer than the DAR-10A.  Its top speed was 454&nbsp;km/h (282&nbsp;mph). Thanks to a stronger construction and dive brakes, it could serve also as a [[dive bomber]]. It could be equipped with two fixed fuselage-mounted 20&nbsp;mm cannon firing forward, two fixed wing-mounted machine guns, and two machine guns for the gunner. It could carry one 500&nbsp;kg (1,100&nbsp;lb) bomb or one 250&nbsp;kg (551&nbsp;lb) and four 100&nbsp;kg (110&nbsp;lb).<ref name="Bernad p29"/> The bombs were mounted under the fuselage and wings.

The DAR-10 was not selected for production.  Some sources suggest that it was passed over in favor of the German [[Junkers Ju 87]] Stuka dive bomber, while the improved DAR-10F was not selected as [[World War II]] had ended and Bulgaria had access to ample supplies of modern Soviet aircraft such as the [[Ilyushin Il-2]] and [[Ilyushin Il-2|Il-10]].<ref name="Bernad p29"/>

==Variants==
;DAR-10A
:First prototype, powered by an Alfa Romeo radial engine.
;DAR-10F
:Second prototype, powered by a Fiat radial engine.

==Operators==
;{{flag|Bulgaria|1878}}
*[[Bulgarian Air Force]]

==Specifications (DAR-10)==
{{aircraft specifications/switch 	 
<!-- if you do not understand how to use this template, please ask at [[Wikipedia talk:WikiProject Aircraft]] --> 	 
	 
<!-- please answer the following questions --> 	 
|plane or copter?=plane 	 
|jet or prop?=prop 	 
	 
|ref=Jane's Aircraft Recognition Guide<ref>{{cite book|title=Jane's Aircraft Recognition Guide|last=Rendall|first=David|page=[https://archive.org/details/janesaircraftrec0000rend/page/505 505]|year=1995|isbn=0-00-470980-2|publisher=HarperCollinsPublishers|location=Glasgow, UK|url-access=registration|url=https://archive.org/details/janesaircraftrec0000rend/page/505}}</ref> 	 
	 
<!-- Now, fill out the specs. Please include units where appropriate (main comes first, alt in parentheses). If an item doesn't apply, like capacity, leave it blank. For additional lines, end your alt units with a right parenthesis ")" and start a new, fully-formatted line beginning with an asterisk "*" --> 	 
|crew=two	 
|length main=9.54 m 	 
|length alt=31.3 feet 
|span main=12.20 m 	 
|span alt=40.0 feet
|height main=3.3 m 	 
|height alt=10.8 feet
|area main=22.2 m²
|area alt=239 ft² 
|empty weight main=1,843 kg 
|empty weight alt=4,063 lb
|loaded weight main=2,570 kg	 
|loaded weight alt=5,666 lb 	 
|useful load main= 	 
|useful load alt= 	 
|max takeoff weight main= 
|max takeoff weight alt= 
	 
|engine (prop)=[[Alfa Romeo 125|Alfa Romeo 128 R.C.21]]
|type of prop= 
|number of props=1 	 
|power main=708 kW
|power alt=950 hp 
	 
|max speed main=410 km/h	 
|max speed alt=255 mph
|max speed more= 	 
|never exceed speed main= 	 
|never exceed speed alt= 	 
|range main=1,170 km 
|range alt=727 miles
|ceiling main=7,250 m
|ceiling alt=23,785 feet
|climb rate main= 	 
|climb rate alt= 	 
|loading main= 	 
|loading alt=<!-- kg/m²--> 	 
|thrust/weight= 	 
	 
|armament=<div>
*4x machine guns:
*2x 7.92 mm fixed in wings
*2x 7.7 mm in rear upper station
*1x 20 mm gun in nose (?)
*500 kg bombs
</div>
}}

==See also==
{{aircontent
|related=
|similar aircraft=
* [[PZL.23 Karaś]] 
* [[Neman R-10]]
* [[Junkers Ju 87]]
* [[Mitsubishi Ki-30]]
|lists=
* [[List of bomber aircraft]]
|see also=
}}

==References==
{{Reflist}}

==Bibliography==
*{{cite journal |last=Bernád |first=Dénes |title= Balkan Birds: Thirty-Five Years of Bulgarian Aircraft Production, Part One|journal= [[Air Enthusiast]] |issue=94|date=July–August 2001|pages=18–30|issn=0143-5450 }}

==External links==
{{commons category|DAR 10}}
*[http://1000aircraftphotos.com/Contributions/Braas/4218.htm Photo of DAR-10A]

{{DAR aircraft}}

[[Category:Single-engined tractor aircraft]]
[[Category:Low-wing aircraft]]
[[Category:1940s Bulgarian bomber aircraft]]
[[Category:1940s Bulgarian military reconnaissance aircraft]]
[[Category:DAR aircraft|DAR 10]]
[[Category:Aircraft first flown in 1941]]
[[Category:Aircraft with fixed conventional landing gear]]