I love these old Helicopters
And this beast is called a Peter Plow, snow milling machine, and was sourced from the Swiss who used them to open up Alpine mountain roads
most of the transportation gear had to be kept in a heated garage to prevent the grease from freezing, oil from solidifying etc
I watched this years ago on the Discovery, History, or Learning channel.. and at that time was only fascinated by the fact that a portable reactor was made in the 60's. Ponder that for a moment. They had enough demand and need for reactors, that they designed and built portable units. Now, what was that energy crisis bullshit we've been fed for the past 40 years? PORTABLE reactors for electricity supply, with a milspec, and DOD part number.