OPI (Of Possible Interest?)
In the late '70's, someone gave me several old Popular Science and Popular Mechanics magazines from the early 50's (that I believe I still have in a box somewhere in the house).
In one of the magazines is a full page ad that General Electric bought, advertising for;
I'll try and find the magazine, and post a photo of the ad if anyone is interested, (when I have some free time).
Interesting.
The power he was talking about getting out of an engine 3 feet in diameter was incredible. I forget exactly but something on the order of that generated by a huge dam.