On Mon, 21 Feb 2005 13:21:40 -0700, Bill Rude wrote:

On 21 Feb 2005 17:20:35 GMT, Dave Hinz wrote:
On Sun, 20 Feb 2005 11:06:01 -0700, Bill Rude wrote:
On Sun, 20 Feb 2005 01:48:21 -0600, Richard J Kinch wrote:
Jason Marshall writes:

I turn my regulator down to about 15 psi and turn my 3-year-old loose
with a blow gun all the time while I'm working in the shop.

Do you know the bursting strength of the tympanic membrane?

Quiet, Darwin is at work here............

I didn't know an eardrum was needed for reproduction.

There's other places where 15psi might be deadly.
Actually, the average pressure required to burst human lungs is a 3
psi differential. I know. It seems low. But that's what it is. And
minor damage can occur at less than 1 pound differential on ear drums.
Don't know what the low limit for lungs is. Wonder how much pressure
it takes to burst an eye? Betcha 15 psi coming out of an air gun has
enough speed to push random dust pretty deep into an eye though.
ERS