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My Mamod SE3+.

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bogstandard:
John wouldn't.

Because they are only single acting, you can't control the steam to push them into reverse. But the engines should run backwards if you flick them that way in the first place, but that is assuming the ports are sighted correctly, which I don't doubt they are.

Bogs

sbwhart:
Sorry John

Didn't mean to put you on the spot.

There's more to these little engines than meets the eye.

Cheers
  :wave:
Stew

bogstandard:
Not putting me on the spot at all Stew.

You are quite right, all types of steam engines operate in different ways.

To make a single acting oscillator engine into a double acting one isn't as easy as it looks. All the port faces have to be redesigned and galleries have to be drilled to join everything up in the correct order, then you have to make the control valve. Of course you have to seal off the other end of the cylinder and put a stuffing gland in there, and because of the length of the stuffing gland, the length of the engine has to be increased, as well as the piston rod.

So maybe about four times the work of a single acting one.

John

HS93:
As your a fan of mamod are the train piston units double acting, if so how about a conversion to them , that would be different and reverse and a bit more power, and still Mamod

Peter :ddb:

Stilldrillin:
By `ek you lot. Steady on!  :bugeye:

The original aim of the project was to make something the same, but different...... Better, smoother, quieter.  :thumbup:

There is a little more to come re this engine, when I get the time to write it.  :scratch:

I`ve now got a long term aim of 4 engines. Single, double, triple, quobble. All recogniseably SE3 Mamod.

The 4 has been mocked up, but no further.......






David D

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