He finished the second connection.
"One more fan to go, Dad—"
He plugged the two outer motors with the large pulleys into the wall outlets above the bench. Then his fingers waited on the switches.
"But Doug, the fan motors will only work on house current—"
"Yes, that's right, but I've geared—pulleyed, I mean—two of them up, so that they'll turn the other two at least twice their normal armature speed. And the simple electric motor works—"
"—in reverse, too, doesn't it! If you turn it by mechanical means, it generates electric current!"
"That's about it. I ought to get about five hundred volts from each, with the pulley ratio I'm using. And they're both connected in series, so—a thousand volts, I hope. Childish, isn't it—"
There was sudden chaos above them.
"Doug—"
Terry dropped the last fan-blade to the floor.