Variants
- '140' – The initial prototype tactical jet bomber utilising the airframe of the second EF-131 with two Mikulin AM-TKRD-01 turbojet engines.
- '140-R' – Converted from '140', the '140-R' was a reconnaissance aircraft powered by Klimov VK-1 engines and various improvements highlighted by flight testing of '140'.
- '140-B/R' – A second '140 airframe, completed as a reconnaissance-bomber, which had partially completed ground tests, prior to flight testing, when the programme was cancelled.
Read more about this topic: OKB-1 140
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