NANOTECHNOLOGY UPDATE: Nanosubmarines Promise a Fast Drug Delivery Device. “What is really impressive about the nanoscale submarines is their speed. One wag of its tail can move it 18 nanometers. Not impressed? Consider that the tail can wag a million revolutions per minute (RPM), which translates to propelling the molecule about 2.5 centimeters per second. In nano-scale terms that’s really fast.”