Lionel 1666 Prairie 2-6-2 Locomotive Pull Test

[@Okurka.]

Now do a transient test on it.

[@joesmith-je3tq]

I do have a few meters left to run.

[@Mark-Harding]

Why does it go woo - woo - woo rather than being perfectly even ? I guess the piston only delivers power on the push stroke.

[@joesmith-je3tq]

Guessing the spring scale, track friction and motor get into resonance. Good physics question. With no load you could see it is indeed very smooth and even.

[@shazam6274]

"...piston delivers power..." 🤣