I thought that I had a system. Use the Piper blade for pitot and static under one wing, Alpha Systems AOA probe under the other wing. Run heaters in both when it is cold, and I thought I had my instrument capable altimetry and an aural warning for high AOA licked. Then I find out that Garmin and Dynon both use a pitot-AOA probe with two ports and then a separate static port someplace else... Only need one device out in the wind, only need one electric power draw to keep it ice free in clouds...but then I have to find a place to put the static port that works well.
So I start searching on here. The advice is to put it on the fuselage side where the fuselage walls are straight and parallel. Nice plan, if you have it. My fuselage walls are straight and parallel through the wing and NOWHERE else. Forward of the wing root, even two inches, and it is still transitioning to straight and parallel. Even two inches aft of the root, it is already tapering into the pressure recovery area. And through the wing? Well, the air is sped up like crazy above the wing, and I suspect that will give some crazy low pressure that varies with q and AOA... So where does it work OK for Instrument altimetry with such a fuselage?
And I really hate the idea of poking holes in my painted composite fuselage until a find a place that works pretty well...
So, would you go with two probes or one plus a static port? Your rationale is as important to me as your choice...
If you go with one probe for Pitot-AOA and a separate static port? Why would you make that choice? Where would you put the static port? And why there?
If you would go with a two probe system, why would you do that?
Thanks for looking!
Billski
So I start searching on here. The advice is to put it on the fuselage side where the fuselage walls are straight and parallel. Nice plan, if you have it. My fuselage walls are straight and parallel through the wing and NOWHERE else. Forward of the wing root, even two inches, and it is still transitioning to straight and parallel. Even two inches aft of the root, it is already tapering into the pressure recovery area. And through the wing? Well, the air is sped up like crazy above the wing, and I suspect that will give some crazy low pressure that varies with q and AOA... So where does it work OK for Instrument altimetry with such a fuselage?
And I really hate the idea of poking holes in my painted composite fuselage until a find a place that works pretty well...
So, would you go with two probes or one plus a static port? Your rationale is as important to me as your choice...
If you go with one probe for Pitot-AOA and a separate static port? Why would you make that choice? Where would you put the static port? And why there?
If you would go with a two probe system, why would you do that?
Thanks for looking!
Billski