While investigating the myriad of machinery at the last Lake Goldsmith Steam and Traction Engine Rally I came across a display and running prototype of the Deane Spherical Rotary Valve fitted to a pre war Norton 16 H bottom end and installed in a ES2 garden gate frame .
I have included a pic of a newspaper article that explains a few of the design features , inventors being inventive have experimented with valve gear for sometime , I believe one motorcycle maker produced a sleeve valve motor with a liner inside the bore which moved up and down by way of a cam to get the ports to coincide ,we see side valve ,overhead valve ,inlet over exhaust [harley and land rover] over head camshaft , DOHC , triple OHC [7R 3A AJS ] desmodronic valves and in two stroke motors we have piston valve and disc valve assisted by reeds and other stuff .
This motor has been in storage for decades and been assembled into a frame so the general public can experience the creativity of the inventors , a quick look on google shows William Ronald Deane holds US patent 3730161 filed May 28 1971 . I seem to remember a rotary valve design fitted to another Norton shown in Roy Bacons book Norton Singles but this differs in that the Deane valve is a sphere fitted with rings that are pegged to prevent rotation and snap offs in the ports [ just like two strokes ] I had a chat with the guys that did all the spanner work and they didn't think the motor produced any more power than the 16 H , it started first kick every time and sat and idled beautifully . The cylinder had been made from a compressor cylinder and the head is machined from solid, what kind of steel? I don't know , I think the text says the valve rotates at one quarter crank speed and the chain drive comes off the vestigial camshaft and th
All in all this is an amazing exhibit and drew a lot of attention from the more technical minded punters at the rally, the inventors also made a head to suit a small honda single but no one seems to know where its gone, perhaps Harold Holt had it under his arm when he swam off to that Russian sub or will it turn up on a lawn mower one day ? better check your shed !
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