Posted by Janicholson on December 20, 2009 at 09:32:53 from (199.17.6.222):
In Reply to: exhaust lift posted by Joe Dowling on December 20, 2009 at 08:27:18:
A simple overview: Almost all IC engines have an exhaust stream that can act as a compressor. This can be utilized for lifting and moving implements just like an air cylinder. In the day, it was cheaper and usable to make a system that diverted exhaust gasses to a cylinder (large diameter) with (I believe) leather seals and attachments to operate different cultivation tools. Hydraulic systems were more precise, and eventually cheaper due to production numbers. Control of depth and down pressure were "springy" and (opinion) that is the major performance issue. The pressure was modest, and it had to be to avoid likking the engine. JimN
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