Any Shay Experts Out There?

[686 Shooter]

After many years of procrastination, my Spectrum 80-ton 3 truck Shay is running on the layout. NWSL metal gears and a SoundTraxx sound decoder is installed. Now I am setting up the sound. I gotta give a huge thank you to Ken Clark for his help.

My question is, did the cylinders on the Shay operate like the cylinders on a non geared locomotive? By this I mean was steam pressure applied to the piston on both the downstroke as well as the upstroke creating two exhaust chuffs per cylinder per rotation of the crankshaft? Or was there only pressure supplied on the downstroke resulting in one exhaust chuff per cylinder per revolution of the crankshaft?

Thanks

Jeff

[686 Shooter]

Got my answer. Thanks for looking.