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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
Just wanted to say hello . just getting started on my project .


Fri Oct 22, 2010 10:56 am
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Joined: Fri Jan 08, 2010 10:36 pm
Posts: 1171
Location: Maryland
Welcome to the Forum, Tell us about what you are planning to build.

Rick


Fri Oct 22, 2010 12:29 pm
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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
Hey Rick I have a old home made Pitot tube bench that I just pick up a few weeks ago. But I want to make a few upgrades. First is a PTS manometer . Can someone tell me how to figure the inside area of round pipe. My pipe is 2.400 ID Thanks Tim


Fri Oct 22, 2010 3:25 pm
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Joined: Fri Jan 08, 2010 10:36 pm
Posts: 1171
Location: Maryland
The fomula is Pi * (R)^2 or Pi * R Squared.

in your cas it would be 3.14159*(1.2*1.2) or 4.5239 Sq-Inchs

Rick,

At at the current time the version of FlowSoft that runs the PTS DM does not support the Pito calculations. But if you are serious about doing this you will need the 100 DM and I would be glad to write the update to support a Pito Bench.


Fri Oct 22, 2010 6:15 pm
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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
Thanks so much Rick! I'm sure going to take you up on that offer. But I can't order a Dm til late November. I'm having a pacemaker installed on Monday so I'm not Working for a little while. But as soon as I can order I Sure will. Thanks Tim


Sat Oct 23, 2010 8:12 am
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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
Hello again everyone. I'm trying to figure out the math for CFM on a head i tested last week . I tested the head at 10'' . At 600 lift on the exhaust the incliened manometer reading was 2.36 with 2.400 ID pipe BP was 30.16 at 59 deg's temp thanks tim


Wed Oct 27, 2010 3:53 pm
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Joined: Fri Jan 08, 2010 10:36 pm
Posts: 1171
Location: Maryland
Tim, was that 2.36 of virtical rise on the incline or 2.36 on the scale at some angle?

Rick


Wed Oct 27, 2010 5:19 pm
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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
thats the reading from my dwyer inclined manometer


Wed Oct 27, 2010 5:40 pm
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Joined: Tue Oct 19, 2010 8:40 am
Posts: 14
I'm coming up with 160.28CFM is that right?


Tue Nov 02, 2010 2:51 pm
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Joined: Wed Feb 24, 2010 5:44 am
Posts: 444
Location: Mississippi Gulf Coast
nhrata wrote:
thats the reading from my dwyer inclined manometer


You may need to change to a percent scale like I did.

Image

Image

Image

Ray

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Tue Nov 02, 2010 6:51 pm
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