|Loaded weight (normal)||2486kg|
|Loaded weight (overload)||2686kg|
|Wing Load (kg/m2)||85(92)|
|Power load (kg/hp)||3.6(3.8)|
|Speed at 0m||245km/h|
|Speed at 2000m||277km/h|
|Takeoff Roll||250m 15sec|
|Bombs (overload)||2*100kg FAB-100|
License-built KR-1 flying boat turned obsolete in mid-30's, and in 1934 first records appear about next generation reconnaissater (designated KR-2). It was intended for catapult launch from 'Kirov' class cruisers. Ice-breaking fleet of the Polar seas also was interested.
In 1935 Soviet Government ordered design of domestic catapults.
Experimental TsKBMS-3 was flown 4 September 1936. It had a all-metal frame (steel tubes for fuselage, aluminum alloy profiles for the wings) with fabric skin on wings, fuselage and tail. Catapult 'hook' was installed. Dual controls (for pilot and gunner/observer) were installed. Wings could be folded backwards for storage goals. Aircraft carried also a photocamera and radio-equipment. Original engine cowling was similar to one of the I-16.
Trials ended in 1936, outcome was far from brilliant. Handling of the KOR-1 (designation for series aircraft) was a complicated task. Even without the main float, KOR-1 had 40% higher drag than similar in size land-based DI-6 2-seat fighter. Numerous design and manufacturing defects were revealed, most of them were cured already on series production stage. Land-based variant also was built and saw extensive service.
Prior to installation of modern catapults on the ships KOR-1 was used for training purposes, on both float and wheels. Old K-3 type catapult also was suitable for KOR-2 launch.
Aircraft entered production despite failed to fulfill project requirements - there were no alternative projects at the time (probably due to intensive political purges). It had better flight performance than the KR-1, while seaworthiness of single-float aircraft was behind one of the flying boat. Successful catapult design was ready (and deployed on modern cruisers) only in 1939. At the time engine cowling was redesigned to provide better engine cooling during taxi.
On the outbreak of the Great Patriotic War KOR-1 was retired from the ships and was used only from the shore. On Baltic's they served as reconnaissaters and S.A.R. aircraft. On the Black Sea during Sevastopol Siege (31 October 1941 - 4 July 1942) KOR-1 served as light strike aircraft. It was used in land-based configuration. During this combat KOR-1 received designation Be-2.
|Created November 25, 1996
Modified June 16, 1999