REFLECTOR: Air pressure question...

[Richard Riley]

No, he just answered what the static air pressure would be.  Like, at sea 
level it's 14.8 PSI, at 20,000 feet it's 6.7psi.

Hiroo is (I think) asking about the "Q" - the pitot pressure at different 
airspeeds.

Q is .5 times the density of the air times velocity squared.

I'm sure there must be a java calculator somewhere on the web, but I can't 
find one.

At 08:15 AM 6/17/05, you wrote:
>Didn't Sid just answer that?
>
>Hiroo Umeno wrote:
>
>>Great.  This really helps.  How about the airspeeds?  Do you guys know 
>>what the pressure differential be at say, 250KIAS?
>>
>>
>>
>>------------------------------------------------------------------------
>>
>>*From:* reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] 
>>*On Behalf Of *Neal Hoffoss
>>*Sent:* Thursday, June 16, 2005 10:18 PM
>>*To:* Velocity Aircraft Owners and Builders list
>>*Subject:* Re: REFLECTOR: Air pressure question...
>>
>>
>>
>>Here's the air pressure at different altitudes.  As for the delta PSI, my 
>>physics is probably rustier than yours!
>>
>>
>>
>>0
>>
>>
>>
>>14.696
>>
>>500
>>
>>
>>
>>14.43
>>
>>1000
>>
>>
>>
>>14.16
>>
>>1500
>>
>>
>>
>>13.91
>>
>>2000
>>
>>
>>
>>13.66
>>
>>2500
>>
>>
>>
>>13.41
>>
>>3000
>>
>>
>>
>>13.17
>>
>>3500
>>
>>
>>
>>12.93
>>
>>4000
>>
>>
>>
>>12.69
>>
>>4500
>>
>>
>>
>>12.46
>>
>>5000
>>
>>
>>
>>12.23
>>
>>6000
>>
>>
>>
>>11.78
>>
>>7000
>>
>>
>>
>>11.34
>>
>>8000
>>
>>
>>
>>10.91
>>
>>9000
>>
>>
>>
>>10.5
>>
>>10,000
>>
>>
>>
>>10.1
>>
>>15,000
>>
>>
>>
>>8.29
>>
>>20,000
>>
>>
>>
>>6.76
>>
>>25,000
>>
>>
>>
>>5.46
>>
>>
>>
>>------------------------------------------------------------------------
>>
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