View Single Post
Old 08-20-2014, 02:40 AM   #12 (permalink)
jamesqf
Master EcoModder
 
Join Date: Jun 2008
Location: Earth
Posts: 5,209
Thanks: 225
Thanked 811 Times in 594 Posts
Of course the real question is why? Not only are propellers much less efficient than a conventional drivetrain, they have all sorts of problems that are familiar to those of us who fly small planes, particularly off rough fields.

First, the throttle response is very non-linear. Get a wheel stuck behind a bump or similar, and you have to give lots of throttle to get over it, then you immediately start accelerating. Meanwhile, you're sand-blasting everything behind you. Oh, and that sand-blasting is also eroding the tips of your expensive prop...

Nor can we forget about the interesting effects of driving in snow or freezing rain, which causes your prop to ice up & lose efficiency, and probably shed chunks of ice outwards at high speeds. (Prop tips move at a significant fraction of the speed of sound.)
  Reply With Quote
The Following User Says Thank You to jamesqf For This Useful Post:
Ryland (08-22-2014)