anyone thought of dooing this? i mean? we're all running OBA systems, granted the pressure is a little low for most cylinders but why not?

just pondering.
Nate.

Easy answer!!!

2" diameter air cylinder x 100psi = 628 pounds

1" diameter hydraulic cylinder at 2000psi = 6280 pounds


:flipoff2:

I thought the easy answer was because air compresses and hydraulic fluid does not. There would be no way to have actual control over the steering with air, it would compress on force instead of holding steady like hyrdaulic fluid or mechanical linkage.

Originally posted by rusted
I thought the easy answer was because air compresses and hydraulic fluid does not.

Give this man a boobie prize!

cm "pneu-guy" k

A buddy of mine did set up a rear pneumatic parking brake ;)

http://www.tennessee4x4.com/toyota/images/ebrake/ebrake-03.jpg

Ok, you win! Your answer WAS easier :eek:

Originally posted by rusted
I thought the easy answer was because air compresses and hydraulic fluid does not. There would be no way to have actual control over the steering with air, it would compress on force instead of holding steady like hyrdaulic fluid or mechanical linkage.

Originally posted by DRM
A buddy of mine did set up a rear pneumatic parking brake ;)

Uhhhh, this wasn't the parking brake thread was it? This was the steering thread?








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:flipoff2:

Caz
- while your basic approach is correct, you're a little wrong. See, a 2 inch diameter cylinder rod has an area of 3.1415*1^2. This gives 3.1415 square inches. Multiply that by the 100 psi of a typical compressor and you get 314.15 lbs.
Now take your 1 inch diameter rod cylinder and do the same thing. You get an area of .78 square inches. Multiply that area by the 2000 psi system you are running, and you get 1570 lbs. Now, I reaize this does not dictate your working fluid, becasue compressibiblity is the primary concern. Just trying to make sure no one screws anything up due to haste.

Best of luck
Reed

So my math is a little rusty? :D

You got me.... I used 3.14*d (circumference) to get the area!

Sheesh! Would you believe that I am an engineer? :flipoff2:

Originally posted by rusted
I thought the easy answer was because air compresses and hydraulic fluid does not. There would be no way to have actual control over the steering with air, it would compress on force instead of holding steady like hyrdaulic fluid or mechanical linkage.

Another correction. Hydraulic fluid compresses, while its very little, it is innacurate to flat out say it doesn't. :flipoff2: :p

Originally posted by Travis Waldher


Another correction. Hydraulic fluid compresses, while its very little, it is innacurate to flat out say it doesn't. :flipoff2: :p

Yeah, compresses a little less than mild steel, right?

This happens to be water. Most fluids look very much like this.

This happens to be 347 steel. Most are generally similar. Phase transition seen here subject of much research. Souce for both of these: LASL Shock Hugoniot Data, S.P. Marsh, Ed.; University of California Press, Berkeley and Los Angeles. 1980.

Caz - while your basic approach is correct, you're a little wrong. See, a 2 inch diameter cylinder rod has an area of 3.1415*1^2. This gives 3.1415 square inches. Multiply that by the 100 psi of a typical compressor and you get 314.15 lbs.
Now take your 1 inch diameter rod cylinder and do the same thing. You get an area of .78 square inches. Multiply that area by the 2000 psi system you are running, and you get 1570 lbs. Now, I reaize this does not dictate your working fluid, becasue compressibiblity is the primary concern. Just trying to make sure no one screws anything up due to haste.

Shutup you FAWKIN NEWBIE!!

You don't know SH$T BITCH!!!

BTW, say hi to Mr. Hanky for me... bahahaha!

Originally posted by DRM
A buddy of mine did set up a rear pneumatic parking brake ;)

http://www.tennessee4x4.com/toyota/images/ebrake/ebrake-03.jpg

FAWK,FAWK,FAWK,FAWK,FAWK,FAWK.

I agree it's off topic, but I really hate it when someone comes up with a really simple and good idea like that.

:flipoff2: to all of you who beat me to ideas like that:D

Eric

Lloyd quit being an engineer..... and go back to the knuckle dragging 4x4 enthusiist roll (too much info) yes techicley water compresses some.. hell everything has a compresion point or a yeild point etc etc engineer speek diamonds having the exact same compresison and yeild ( if I remember that correctly) Any who...


But the easy understandable answer was that air compresses alot.

damn... note to self stop drinking now..