Ingersoll Rand Spot Air 6-cylinder radial engine air compressor from the late 40s. 1:58 video.
https://www.youtube.com/watch?v=jyBf4PaZ6Mc
Previously:
https://www.homemadetools.net/forum/...895#post175548
https://www.homemadetools.net/forum/...767#post170965
https://www.homemadetools.net/forum/...654#post167065
https://www.homemadetools.net/forum/...787#post163702
https://www.homemadetools.net/forum/...226#post157892
