In 1971 Kamov Design Bureau was ordered to produce new ultralight helicopter for military service. Sergei Fomin, Deputy Chief Designer, was ordered to lead this project.
The special task for this helicopter was that it should be able to be transported in a cylinder container of 500 mm diameter. The reason was that Navy wanted to have an opportunity to pull the helicopter out of submarine's torpedo tube.
Another point was that the helicopter should be able to be assembled for flying in only 15 minutes when unpacked from container.
Powerplant was 40 hp aircooled rotary engine which burned autofuel.
A full-scale mockup was built first, followed by a test plarform which included a real engine, rotor system, transmission and controls.
The only parts which were detachable from the helicopter for transportation were the four main rotor blades. All other parts were easily folded. The main rotor blades were attached by single shift each
No balancing was needed after assebling less rotor tracking. Time to assemble helicopter was only 10 min.
The Ka-56 wasn't ever flown.
Empty weight: 110 kg
Take-off weight: 220 kg
Range (calculated): - 150 km
Cruise speed (calculated): 110 kmh
Ceiling (calculated): 1700 m