Merlin - Helicopter sim
reminded me about this great little sim. It's a good way to kill 10 minutes and you can run it with the keyboard.
From the manual:
"The Merlin Helicopter Challenge was developed for use by the Royal Navy for recruitment purposes. We gratefully acknowledge their permission to release Merlin to the general public. If you would like further details on careers in the Royal Navy, please contact your local recruitment office."
Here is the full manual for you to print out:
Download the sim here - only 158K