 To start a train involves releasing the brakes and applying power, though
 the order of these actions depend on the gradient and motive power.

 To release the brakes move the brake handle to the release postion using
 the 'Q' key. Power can be applied by using the '0' - '9' keys, up to the
 maximum for the motive power being used. A Class 50 has seven notches, an
 Inter-City 125 has five. The '0' key removes all power.

 Applying too much power too soon may result in a power overload trip if
 applicable to the motive power. This can be reset using the 'O' key.

 Overspeeding may result in an overspeed trip, which again can be reset
 with the 'O' key.
