Posted by: Brian McMorran
Date: January 27, 2009 04:17AM
On the SACA forum Ken Helmick posted the late Ted Pritchard's last patent. It shows a piston valved uniflow with exhaust function also available on the piston valve for compression control.
Back in 1920 Stumpf had a similar idea for the 5"x4" Unaflow automobile engine. Similar in outward appearance to the Doble uniflow, there are a number of detail differences.
Now folk are reading the forums, though maybe for the wrong reason, I would just like to remind them I have a number of original Pearson Cox and Stumpf Unaflow blueprints. Also, if the SACA article is correct, the sole surviving Pearson Cox 15 drivers manual.