Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Nitrogen to spray with?
View Single Post
  #53 (permalink)  
Old 02-19-2008, 12:33 AM
milo's Avatar
milo milo is offline
point on positive
 
Last photo:
Join Date: Sep 2003
Location: milogarage Calif.
Age: 58
Posts: 1,682
Wiki Edits: 0

Thanks: 3
Thanked 8 Times in 5 Posts
It's a heat issue.
C/P
The reason airlines and race car crews fill their tires with nitrogen has absolutelly nothing to do with rate-of-loss or oxidation or even fuel economy. Nitrogen expands and contracts at a lesser rate with changes in temperature than atmospheric air. The process of separating the nitrogen out for the tanks used in this process removes the moisture content in normal air. It is the presence of moisture that causes the noticable increase in tire pressure with temperature increase. This is a BIG deal when you cruise at 200mph for 500 laps and you need all the traction you can get (meaning keeping the pressure as low as regulations allow).

It makes a big difference on airlines for massive planes coming into land where tire temperatures skyrocket rapidly. Again, keeping expansion down gives the pilots better traction, hence better control, during the rollout.
Attached Thumbnails
Click image for larger version

Name:	backwhen.JPG
Views:	97
Size:	69.2 KB
ID:	28055  

Last edited by milo; 02-19-2008 at 12:38 AM.
Reply With Quote