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| | PBS: Tesla - Master of Lightning: Remote Control |
 | | With the invention or improvement of several more control elements, he was able in short time to put them to use. |
 | | Radio signals controlled switches, which energized the boat's propeller, rudder, and scaled-down running lightssimple enough in concept, but quite difficult to accomplish with existing devices. |
 | | Radio control remained a novelty, an exciting field for experimentalists and specialists, until the launching of the Space Age and the orbiting of myriad commercial and military satellites, all under remote control. |
| www.pbs.org /tesla/ins/lab_remotec.html (449 words) |
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