I've seen an identical thread somewhere...
Anyway, the answer is 'Drive Shaft'
Next question: Who has school tomorrow (Saturday) ?
... that is correct, it's me...
![Undecided :-\](http://forum.shipsim.com/Smileys/default/undecided.gif)
Seriously now, complete the following sentence:
The secret of success is knowing who to blame for your (blank)
![Wink ;)](http://forum.shipsim.com/Smileys/default/wink.gif)