A progressive development of the K-125A and K-190 of 1947 and 1948, Kaman’s second helicopter, the K-225, first flew on 10 December 1951.Kaman put the K-225 into limited production in 1949 as the YH-22.
The K-225 is powered by a 225 hp Lycoming O-435.
Certified by the CAA, there were eleven K-225s produced and they were used in the crop-dusting role.
As a single-seat crop duster, the K-225 was supplied to the Turkish Department of Agriculture.
Testing by the U.S. Navy influenced the award of contracts for the HOK-1 and HTK-1 to the company.
Under U.S. Navy contract, Kaman fitted a 175-h.p. Boeing YT-50 gas-turbine engine to a K-225, and this was the first helicopter, with turbine-driven rotors, flying on 10 December 1951.
Engine: 225 hp Lycoming O-435
Rotor diameter: 38 ft
Fuselage length: 23 ft
Height: 11 ft 6 in
Empty weight: 1800 lb
Loaded weight: 2700 lb
Max speed: 73 mph
Cruise: 65 mph
ROC: 1000 fpm
Ceiling: 12,000 ft
Range: 194 mi at 65 mph
Seats: 3
All Aero 