Mopar Welder acient awesomeness

I helped my neighbor take down 3 tall towers out of an Orange grove here in Plant city. At the top of these towers was a 277 I think was the size poly motor with huge fan atached to each. They would run these to blow the frost off the orange tree when it would freeze. These were in use long time ago. I'd say 50 yrs ago. I which I had taken pictures.