Why does he have to pedal???

Watch this propeller driven tricycle in operation:
  http://www.youtube.com/watch?v=UnntlyUiNFU


Now, seems I recall a discussion here about how a propeller driven
sailboat 
could use the wind turning its propeller to push it directly upwind.  If 
that's the case how come the poor bloke shown has to pedal his tricycle.
If 
your theory was right all he'd have to do is face the thing into the wind 
and let the propeller start turning and off he would go at ever-increasing

speeds without having to pedal because as the apparent wind speed
increased 
so would the thrust increase and pretty soon he'd be going 100kph.

So much for your dumb theory.

Wilbur Hubbard