I recently came across some articles pertaining RC Submarine modeling in the 1960's from a magazine called Grid Leaks.
You can download the pdf files
https://rclibrary.co.uk/title_details.asp?ID=2339
https://rclibrary.co.uk/title_details.asp?ID=2423
You can download the pdf files
https://rclibrary.co.uk/title_details.asp?ID=2339
https://rclibrary.co.uk/title_details.asp?ID=2423
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