B/F-207
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Borovkov-Florov I-207"3"

    Fighter (testbed)

    Engine: 1x M-63 radial engine / 2x Merkulov DM-4 ramjets under the wings.
    Wing Span: 7 m
    Length: 6.35 m
    Weight: Loaded 1,850 kg
    Maximum Speed: 486 km/h (with ramjets N/A)
    Ceiling: 10,200 m
    Range: 600 km
    Crew: 1
    Armament: 2x 7.62 mm machine guns
History:
The I-207"3" was developed from the I-207"1" and "2", but still did not satisfy the demands for performance from a fighter in 1939/40. To try and gain extra speed the "3" was fitted with two I.A.Merkulov DM-4 ramjets in 1940, around 20 flights were made, but the high fuel consumption and high drag of the ramjets ment the idea was not continued with.
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