Team ricky

I’ve made the slide valves and rods 😁 all looks good 👍

I’ve also ordered materials for valve forks and various nuts and glands .. I’m not sure how to make the Stevensons reverse gear various arms with bushes on them as I haven’t made a reverse engine to date !

I thought of making the flat part of the arms first and silver soldering the bushes on but keeping them un-drilled and over lengthwise for final machining once the soldering is completed, I have got a small rotary table (Proxxon) but it’s not really strong for removing bulk especially in steel !

Cheers R

Yes entirely my my misunderstanding lol 😂
Sorry Crubey

Next job onto the slide valves and valve rods today

Cheers R

This was using the cast base measurements as my crank bearing blocks follow the drawing for cast base too….

So the Columns are correct at 3 3/32 for a cast base

The main crank bearing C/L is sport on for a cast base

And the trunk guide stack is correct as per drawing

The con rods are spot on as per drawing

The hole position through the cross head is spot on as per drawing

I’m stumped but left thinking the cross heads too long towards the crankshaft,

Just checked and the cross head over all is 1.2.mm too long

Honestly it probably is most of the cause and I’ll take 1.2 off and call it !

So I’ve drawn up a quick front view,

And added the drawing dimensions in decimals

Calculated the gap expectations between the bottom of the trunk and base plate bearing pads, There are no other variables effecting this gap..

Came up with 1.4217”

My engine measured 1.4315”

Ah sorry crubey , yes we were on the same page lowering the cross head guide / trunk!

I thought the suggestion was between the cross head / piston rod my bad !

Thanks for the suggestions Jason I probably will lower the trunk and as you say create a drawing to work out what the problem is and where it lies ..

Cheers R