the Gentleman's Choice
Yeah, this is no longer kept one ahead of my LJ. It's just a backup.
Steam, that is.
We went to Ballarat today and I found this little steam engine in Scotty's shed. Grandma made it a christmas present. There wasn't much fuel left but I got it oiled and moving first thing after getting home.
The DMM reads the voltage across the motor. There's an LED soldered across its terminals, so while the voltage gives a rough measurement of the speed, the LED is clamping it at about 2.2V.
The little engine spins up then exhausts itself and stops. I think my problem is that I had too much water in the boiler and there wasn't enough room to build up a good head of steam. I'll do some more experimenting when I acquire more fuel.