Miniature Pressure Port
Miniature Pressure Port
(OP)
Hi all,
I'm looking for a threadable pressure port, the smallest possible. The pressure sensing and "working" lines have very small diameters (~20 thou ").
I need the sense line to be 90 degrees to the "working" line I'm wondering if I have to use something fairly large or is there something available in this size range?
To clarify what I mean by "threadable", the ideal would be to have a threaded hole on the part in which the pressure line is drilled, and then screw in an insert to a more standard sense line size (80 thou " or ~2mm).
Thanks
I'm looking for a threadable pressure port, the smallest possible. The pressure sensing and "working" lines have very small diameters (~20 thou ").
I need the sense line to be 90 degrees to the "working" line I'm wondering if I have to use something fairly large or is there something available in this size range?
To clarify what I mean by "threadable", the ideal would be to have a threaded hole on the part in which the pressure line is drilled, and then screw in an insert to a more standard sense line size (80 thou " or ~2mm).
Thanks





RE: Miniature Pressure Port
RE: Miniature Pressure Port
I have found some threadable ports but they have M5 threads, that's too big. I was hoping for M3 (or similar imperial size) with 0.025" holes.
RE: Miniature Pressure Port
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The flow-through size is a bit bigger than I hoped but I think it'll be OK.
RE: Miniature Pressure Port
is this for process piping
RE: Miniature Pressure Port
NACA report 1364 shows that small pressure ports are the most effective (0.020"-0.030" generally). That's tiny, I know and unfortunately I won't be able to do it on my lathe, I'll need to use EDM drilling.
Unless you have experience otherwise, that using a small drill hole (1/16) would be acceptable?
RE: Miniature Pressure Port
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TTFN

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RE: Miniature Pressure Port
you might consider a tube insert rather than a drilled port
how do you plan to test your custom AOA/pitot measurement?
RE: Miniature Pressure Port
Testing: intially calibrated in freestream (ie: outside) and then in a wind tunnel.
RE: Miniature Pressure Port
for both measurements the edge effects of the port are important
RE: Miniature Pressure Port
That's good information for the edge effects, I was just going to bevel the edges of the holes but I'll take a look at detailed information on this point.
For the temp range, the probe will be unheated (limited to "sunny day" operation). so probably -20C to +55C (DO-160 CAT A2 for temp)
RE: Miniature Pressure Port
TTFN

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RE: Miniature Pressure Port
sunny days -20C to 55C, famous last words, that's not enough, just get a heated probe that has been design and tested. ice crystals are very small but they can really make a mess
RE: Miniature Pressure Port
RE: Miniature Pressure Port