The Boeing T50 (company designation Model 502) was a small turboshaft engine produced by Boeing.

It was the first turboshaft engine to ever power a helicopter: a modified Kaman K-225 in 1951.

[1] Based on Boeing's earlier Model 500 gas generator, the T50's main application was in the QH-50 DASH helicopter drone of the 1950s.

Two T50 were tested on a HTK-1 (Kaman HH-43 Huskie) in the 1950s, which was the first test of twin turbine engine on a helicopter.

[2] Data from Jane's All the World's Aircraft 1962-63.