Steam Locomotive timing

[HobbyNutParticipant @hobbynut]

Being a “newbie” to steam locomotive construction, I am having difficulty getting my motion timed.

I have built a “Big Goods” from ME, and I have assembled it, and can run it on 1 cylinder, in 1 direction only, either forward or reverse.

I cannot figure out where the eccentrics on the drive shaft have to be in relation to the crank. The reversing lever arrangement does not appear to move enough to reverse the engine ,but just enough to stop it. I have quadruple checked all the connecting rods, links etc for length and c-c distances and everything is “as per drawings”….

A diagram of where the slide valve should be at 0, 90, & 180 degrees of crank travel would help.

I am in Canada, and have been building this, from scratch, i.e. no castings since about 1996 or so.

[HobbyNutParticipant @hobbynut]

5″ Gauge 4-6-0 2 cylinder

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