Zenith Aircraft Builders and Flyers
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Static port location
I am at the point in building my 750 super duty that I need to place the static port. I’m not sure where to put it to prevent any pressure changes from the fuselage. I’m thinking about putting it close to the tail. Anybody have any suggestions?
Replies to This Discussion
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Permalink Reply by Bob Simmons on
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Zenith should specify where it goes. Otherwise.....
https://www.kitplanes.com/static-port-location-and-altitude-calibra...
Some people just put it inside the cabin in unpressurized aircraft.
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Permalink Reply by Leon Everett on
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The folks at Zenith haven’t been able to give me any advice on that. It probably doesn’t matter that much on such a slow airplane but I was just wondering what other 750 builders have done.
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Permalink Reply by Arnie Minear on
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Ours is going on each side of fuselage see pic here.
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I was thinking of putting mine there also. I wonder if anybody else who already has their airplane flying is using this position or placing it out somewhere?
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I've got a ton of old hi-res pictures of the original demo and LSA 750s (non-STOL) and I only see what looks like a static port in one picture, so I have to wonder if they put theirs inside the cabin.
EDIT: No matter where you put it, make sure the line goes uphill from the port for several inches so it doesn't collect water.
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Permalink Reply by John Burns on
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The Zenith pitot tube on the 750 STOL has a static port built in. This has worked quite well so far on my airplane with an MGL EFIS.
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Thanks. I’m using advanced flight instruments and they require a static port. The pitot from Dynon has angle of attack but no static
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Permalink Reply by François Balaux on
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I use a Dynon with AOA in my 701. I did not connect a static port so the static pressure is measured directly on the instrument. It works very well with the doors installed (I validated with a GPS) but the reading becomes erratic if I fly without them.
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Permalink Reply by Bert Shivers on
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How does the instrument know whether or not it is connected to a static port?
Perhaps a statice port creates a restriction and therefore slows rate of change in pressure as opposed to the larger diameter of the fitting on the instrument. I do not know. If that is the reason for the requirement, could one just put a restriction in the fitting on the back of the instrument, or wherever the static line would connect?
I am not intending to argue for or against the need for static ports on Zenith 701 or 750, just trying to make a decision about installing on a 701.
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That is not the reason. The static port is needed on many aircrafts because the air pressure in the cabin is not the same as outside of the aircraft. Air leaks and the shape of the fuselage can increase or decrease the pressure, which affect the altitude and speed readings.
I do not have a static port in my 701. The readings are accurate with the doors on, but completely random if I remove the doors.
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Thanks for the reply. I agree with you. I am mainly trying to be sure that I am not just being lazy. As an old A&P, I work on and fly a friend’s Rotax UL powered 701.
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