So it has four rotors.

If you spin these rotors at the same speed, the robot hovers.

Each day, the operator would cut off the daily settings, and this would tell them the daily configuration of their machine, such as what rotors to use and the order of the rotors.

With 3 rotors, each with 26 numbers, the length of the sequence before repeating is 26x26x26.

The Bombe was multiple Enigma rotors chained together, allowing it to rapidly test different key settings.

For example, if the rotors can be rearranged, then the order can be selected in 6 ways.

If you increase the speed of each of these rotors, then the robot flies up, it accelerates up.

When it ticks forward, a new shift could be generated by adding up each number on the rotors.

So these are helicopters with four rotors, and they're roughly a meter or so in scale, and weigh several pounds.

And then finally, if you spin opposite pairs of rotors faster than the other pair, then the robot yaws about the vertical axis.

So you can take this thing over here and move it around, and what you actually see of the object depends on the angle of the rotors.

For example, some changes they made were to add a fourth rotor wheel, and increase the number of possible rotors you could put into the machine to 60.

The small warhead is taking one cascade, and spinning up the rotors and slowing them down, and the big warhead is talking to six cascades and manipulating valves.