Static system

[RV7A Flyer]

Originally Posted by Bluelabel

I used the Safe Air kit and the ports as provided.. I believe that mine would be considered flush. Is that right? Jesse, I just started flying, so how do you know if you are getting airspeed errors? I'm seeing IAS and TAS in the range I would expect for the plane in the current configuration I'm flying.

If you used these

http://www.cleavelandtool.com/Push-O.../#.WoSvpaJu6kI

then I believe they are *not* considered "flush". They do protrude above the skin, as noted in the description.

That's what I have, and airspeed seems to be right on the money.

(Note that I don't know for sure, but perhaps an earlier version of these *was* actually flush with the skin when installed?)

[rvbuilder2002]

Originally Posted by Mudfly

https://www.vansaircraft.com/cgi-bin...tatic-kit-port

Is this a new product from Vans?

Must be.
I hadn't heard anything about it.
I imagine it is a vendor produced part being offered as an (additional) $30 option for those that don't want to use the blind rivet supplied in the $19 static system kit.

[rvbuilder2002]

Originally Posted by RV7A Flyer

If you used these

http://www.cleavelandtool.com/Push-O.../#.WoSvpaJu6kI

then I believe they are *not* considered "flush". They do protrude above the skin, as noted in the description.

That's what I have, and airspeed seems to be right on the money.

(Note that I don't know for sure, but perhaps an earlier version of these *was* actually flush with the skin when installed?)

It all depends on the vintage of the parts that someone has....

I think Cleveland, Safeair, and perhaps others originally offered a rivet on static port that had a flush profile. After enough users had errors because of incorrect static pressure, they redesigned the part.

If someone has ports that look flat/flush to the outer skin, and do not protrude to mimic the recommended blind rivet, the should count on there being some error in their ASI and altimeter.

[Richard Connell]

The original Safe-Air “flush” ports were most definitely wildly inaccurate. I saw cruise TAS errors nearing 10KTAS and commensurately large altitude errors.



The Cleveland ones that mimic the vans rivet I can report are super accurate.



This has been extensively covered before so worth a search.

The new vans screw version looks like a good compromise between the convenient but probably overkill push fitting Cleveland one and the rivet method which some people struggle with for various reasons.

Cheers

[pauldan181]

I bought the static ports from Cleaveland probably around 2002 and they were absolutely flush. I had errors (low and slow) that got worse with increasing airspeed.

[Champ]

Checked a lot of posts and it seemed that the Vans rivet static port worked well and people had a lot of trouble with other systems so I decided to stay with it and just change the internal tube connection. So - son machined a couple flanges with threads for Parker fittings, scuffed mating surfaces and applied a little proseal (just because) and pulled the flanges tight to the fuselage with the Vans rivets.

Picture during construction: