averaging pitot tube Design

[taphonomist]

I have access to some rapid prototyping machines and am looking to design and make an annizubar for a simple pitot setup. I've looked around and found a number of shapes for this type of thing (circular, elliptical, T-shaped, etc) and was wondering if anyone had any reason to pick one over the other. I'm thinking of going with an elliptical shape right now. Also, I don't really know how many pressure ports are needed to get a good average.

Thanks in advance,
Dustin

[nvecta]

Here is a site with some information regarding number of holes.


And another discussing pro's-con's of different types.

[Mouse]