I've started to assemble the engine but have come up with a problem, the slide valve looks on the big size. as when the cam rotates no gap in the valve chest for air intake. On my drawing the slide valve is 5/8ths long is this correct for the Stuart No 10 cylinder. The valve chest on my drawing is 7/8ths so something must be wrong as that leaves 1/8 either side.

Or I've done something drastically wrong. Bob.

Thanks Jason, is the internal gap on the valve slide 3/8ths as it is on my drawing, also the throw on eccentric on mine is 1/8th. This looks like a remake of valve chest and valve as I've made the cylinder to measurements given on the previous post.

Bob

Thanks, all the measurements don't work out here, it's a Stuart 10 cylinder measurements but incorrect on other parts on the A A Raymans drawing. I shall bung it in a bag and start on something else .

Bob

Thanks Old School, I cant work this out. The A A Rayman drawing calls for the Stuart cylinder which in the past post the measurements are given for this so if the casting was used these ports are cast in the casting. I have made the cylinder from bar stock to the measurements required from the post from Jason so the same as the Stuart cylinder. The drawing from A A Rayman calls for a 1/8 th eccentric, so a 1/4 inch total, but if its the same cylinder then it should be 3/32 and not 1/8th, so if the 1/8th was used how can it work? the total length on A A Raymans drawing for the valve is 5/8 th.

Any help please, Bob    Nice pictures of your cars old School .

Edited By BOB BLACKSHAW on 31/10/2020 15:57:06

Sorry for the delay Jason, My drawing shows that its the same as the Stuart cylinder drawing that you sent me the other day. My drawing is blurred but its 5/64 ths from edge of ports. Why a 1/8th eccentric on the drawing when it should be 3/32. Book states that the ports are cast in the cylinder.

Thanks Bob