Ahead direction of rotation of Bolton triple expansion engine

[Tony MartyrParticipant @tonymartyr14488]

What is the ‘normal’ convention?

[Tony MartyrParticipant @tonymartyr14488]

I am halfway through building the valve gear and have been creating setting lines to help in setting the valves. Then I realized that I have no idea as to the direction of rotation the designer used – Most marine engine designs seem to favour the ahead direction, since they spend most time running that way but I can't see that in this design it matters, so is it up to me to decide?

I was intending to use the most external of the two eccentrics on the HP and LP cylinders with IP same as HP to run ahead – now I have confused myself and can find no help from the drawings

Can anyone help?

Tony.

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