The thing I find the most interesting about this engine is that Ford did not use a spark plug. Inside the cylinder were two electrical switch contacts, and the

The thing I find the most interesting about this engine is that Ford did not use a spark plug. Inside the cylinder were two electrical switch contacts, and the spark was made on opening the switch. The electricity for this was provided by putting it in series with a light bulb connected to his house wiring. That's probably why it ended up in his kitchen sink - he would not have had any electricity in his garage.