United and IHC at Boonville, Indiana

These smooth running engines made a happy display last October at the show over at Boonville, Indiana. Note the fine tuning adjuster at the end of this video, for setting the ignition timing. These intricate little details were all worked out on paper, when designers had to create images in their minds, without the benefit of a computer screen. I wonder if we still have people with adequate imaginations in our modern age.