Cos I'm so not. If I were to just fall into a wormhole and arive at 2000BC I would have nothing to show for. I can't even build a steam engine!
I know how a wheel works. But idk if I could fashion one that would work in the usual manner. I'm thinking about getting Amazon.com: Internal Combustion Engine Fundamentals (9780071004992): John Benjamin Heywood: Books: Reviews, Prices & more
It's a bit pricey. But if you take into account that this could be immensely useful BOTH in the event of unexpected backwards timetravel AND nuclear/zombi/amazon holocaust, it's the bargain of the century.