This HOK-1 was built in 1953 and spent its days assigned to the Kaman Flight Test Department. It was acquired by the NEAM in 1964 and plaved on display, before being stored and earmarked for future restoration. This was substantially delayed when a devastating tornado struck the museum causing the loss of many exhibits. The project was restarted in 2018 and completed in 2022. Note, the tail boom of this exhibit is from HOK-1 125530.

One of an early batch of four HOK-1 helicopters. Kaman photo. Photo from: Nederlands Instituut voor Militaire Historie

This is a composite Kaman HOK-1. The major part of the airframe is from 129801 but the boom and tail assembly is from 125530 - hence the markings. Ex USMC, the h/c was badly damaged in the Tornado of October 3, 1979 and is now stored.