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Crueby, thanks for tuning in, and the question.As with most things, there are probably other names for a Lee Shaft.A Lee Shaft is made up of two rods tied to two cranks ofset by 90 deg. The shafts are tied to cranks of the same dimensions on both ends. The hafts c/c is equal to the of c/c between the shafts attached to the cranks. The purpose is to transfer motion from the driving shaft to the driven shaft. When one of the rods is pulling, the other is pushing, the 90 deg prevents lockup. I think it works best at low RPM, so it never really caught on in modern engine design, remember, this is 1889, and is designed by a pioneer in engine design. It might be noted, Forrests engines had spark plug ignition, something that had not caught on in mainstream engine design for another 30-50 years or so.Hope this helps, Soon I'll be posting some pics of the mechanism.maury
Quote from: maury on May 29, 2021, 07:55:17 PMCrueby, thanks for tuning in, and the question.As with most things, there are probably other names for a Lee Shaft.A Lee Shaft is made up of two rods tied to two cranks ofset by 90 deg. The shafts are tied to cranks of the same dimensions on both ends. The hafts c/c is equal to the of c/c between the shafts attached to the cranks. The purpose is to transfer motion from the driving shaft to the driven shaft. When one of the rods is pulling, the other is pushing, the 90 deg prevents lockup. I think it works best at low RPM, so it never really caught on in modern engine design, remember, this is 1889, and is designed by a pioneer in engine design. It might be noted, Forrests engines had spark plug ignition, something that had not caught on in mainstream engine design for another 30-50 years or so.Hope this helps, Soon I'll be posting some pics of the mechanism.mauryAh - think I have a mental picture of that. Sounds like an interesting way to avoid needing sets of bevel gears to offset the shaft, simpler parts giving the same result. Thanks!