INTAKE PORT PROBING WITH FLOW BALLS

[user-9274568]

What does a spot flowing backwards look like with a pitot?

[jed]

I know Jole Dubose swore by using the flow balls.

[MadBill]

What does a spot flowing backwards look like with a pitot?

Should show negative dynamic pressure I'd guess; probably erratic due to turbulence induced by the upstream arm.

[pcnsd]

What does a spot flowing backwards look like with a pitot?

Should show negative dynamic pressure I'd guess; probably erratic due to turbulence induced by the upstream arm.

Wouldn't that be easier to see with a string on a stick or even a bunch of strings on a stick? I suppose if you felt the need to quantify it, you could measure with the pitot, but why?... What you want to do is make it go away.

[GARY C]

What does a spot flowing backwards look like with a pitot?

Should show negative dynamic pressure I'd guess; probably erratic due to turbulence induced by the upstream arm.

Wouldn't that be easier to see with a string on a stick or even a bunch of strings on a stick? I suppose if you felt the need to quantify it, you could measure with the pitot, but why?... What you want to do is make it go away.

The flow ball kit I got came with flags also, the flag/string gives you direction, the proper size flow-ball gives you an idea of where to fill and how much is needed... at least in theory.

It seems more times than not the apparatus you stick in the port effects the measurement enough that it can not be duplicated without the apparatus in the port.