View Single Post
Old 09-12-2013, 02:52 PM   #89 (permalink)
3-Wheeler
Master EcoModder
 
3-Wheeler's Avatar
 
Join Date: Dec 2008
Location: Southern WI
Posts: 829

AlienMobile - '00 Honda Insight
Team Honda
90 day: 80.05 mpg (US)
Thanks: 101
Thanked 563 Times in 191 Posts
Quote:
Originally Posted by Old Tele man View Post
...fill the tires with LOTs of hydrogen (or helium) for an even LIGHTER result!
It's funny you mentioned this, because we were just discussing this at work last week.

The "most" you can get into a tire is about "80%" depending on tire pressure.

1) An empty tire is not really empty! It has atmospheric pressure in it based on barometric pressure, so call it one atmosphere of *air*.

2) Fill the tire to 15 psi, and now the tire has two atmospheres of air in it, or 50% Nitrogen and 50% air.

3) Fill it to 30 psi and now the tire has 75% Nitrogen and 25% air, and so on.

4) Air is already 80% Nitrogen.

Just something to think about.

Jim.
  Reply With Quote