Variants
- DB-240
- Two prototypes of the Yer-2 series with two 1,050 hp M-105 engines.
- Yer-2
- Production version with two M-105 engines, 128 built.
- Yer-2/AM-37
- One aircraft re-engined with two prototype 1,380 hp Mikulin AM-37 engines, the fastest of all Yer-2s.
- Yer-2/M-40F
- The first diesel-powered Yer-2, with modified wings. One converted with two 1,500 hp Charomskiy M-40F diesel engines.
- Yer-2/ACh-30B
- Production model of the diesel-engined version. Performance was excellent despite the poor reliability and rough running of the Charomskiy ACh-30B diesel engines. Range increased 1,500 km (930 mi) from the version with M-105 engines.
- Yer-2ON
- (Russian: Osobogo Naznachyeniya–Special Assignment) Two aircraft from the Yer-2/ACh-30B production line were modified with a 12-seat VIP cabin, military equipment removed and long-range fuel tanks in the bomb-bay. A third aircraft was converted from a Yer-2 (1941 production) and used for shuttle flights between Irkutsk and Moscow.
- Yer-2N
- (Russian: Nositel—Carrier) One aircraft was modified as an engine test-bed for captured Argus As 014 pulse jet engines.
- Yer-2/MB-100
- One production aircraft used as a test-bed for the 2,200 horsepower (1,600 kW) Dobrotvorskii MB-100 engine in 1945.
- Yer-4
- The final iteration of the Yer-2 series was a 1941 production aircraft re-engined with ACh-30BF engines and redesignated as the Yer-4. It had a slightly larger wingspan, increased take-off weight and improved armament. The prototype was tested in December 1943, but did not enter production.
Read more about this topic: Yermolayev Yer-2
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