The D-model's failing was in its late arrival into the war and its production totals were limited due to the lack of available fuel, parts, and veteran pilots. Regardless, the D-model became an excellent (if short-lived) entry into the Fw 190 fighter family line and its performance was exceptional at low-to-mid levels (the Dora gradually suffered at anything above 20,000 feet).
The Dora line included various sub-variants of its own that went beyond the base form. The original D-9 was produced in 1,850 examples and ran from the D-9/R1 to the D-9/R20 with manufacture beginning in August of 1944.
The definitive D-9 production form exhibited an overall length of 33.5 feet, a wingspan of 34.4 feet, and a height of 11 feet. Power was from the Jumo 213A engine of 1,750 horsepower driving a three-bladed constant-speed propeller unit at the nose. Performance included a maximum speed of 426 mph, a range out to 520 miles, and a service ceiling of 39,000 feet (though with reduced performance). Rate-of-climb was 3,300 feet-per-minute. Empty weight reached 7,700lb against an MTOW of 10,670lb.
The proposed Fw 190D-10 became an 'upgunned' fighter form with 2 x 20mm MG151 cannons in the wing roots backed by 2 x 30mm MK108 cannons in the outboard wing sections. This aircraft was slated to include a 30mm MK108 cannon in the nose firing through the propeller hub but, despite its promising nature, the D-10 was not pursued for serial production.
The Fw 190D-11 is believed to have been built in about seventeen total examples to go along with seven completed prototypes. These fighters came equipped with Junkers Jumo 213F series engines and carried enlarged supercharger intakes along the sides of the nose. The model also deleted the cowling machine guns in favor of 2 x 30mm MK108 automatic cannons outboard of the wing root cannons, similar to that of the D-10 - making for an all-cannon armament suite.
The subsequent Fw 190D-12 prototype introduced a hub-mounted automatic cannon (MK108) but only three examples were completed to the standard. The Fw 190D-13 was of similar form but had a 20mm cannon in the propeller hub instead - its total 20mm cannon armament count now reaching three for a formidable frontal punch. Two prototypes of this standard were completed from the Fw 190A-8 stock and these were further equipped with hydraulically-boosted ailerons. Despite production orders being handed out for the D-13, as few as two are believed to have ever seen operational service before the end of the war.
The Fw 190D-14, based on work completed in the earlier D-12 entry, was intended to fit a DB603 radial piston engine into the existing lengthened fuselage of the Fw 190D. This aircraft flew for the first time on November 20th, 1944 but was nevertheless cancelled in January of 1945 as attention turned to the follow-up D-15.
The Fw 190D-15 appeared in January of 1945 and was based in the Fw 190A-8/A-9 complete with the DB603 series engine and a lengthened tail section. However, the end of the war ensured that this model would not make an impact on the war - just a single prototype is thought to have been completed.
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