AOA indicator
Posted: Fri May 09, 2014 3:09 pm
OK, here is the new thread, split off from "Air Speeds in cold weather".
'Kess Blaswich' kessb@wavecable.com [Earthstar_Aircraft] <Earthstar_Aircraft@yahoogroups.com> 11:22 AM (1 hour ago)
to Earthstar_Airc.
Martin, I like your interest in an AOA indicator. The prices have come way down, and there are also some experimental projects to make one really cheap. I like you, don’t have an issue with the trim knob, even when I forget which way to turn it. Like Cessna’s just turn a little bit and see if the stick pressure goes with you or the wrong way, easy deal just turn the other way until the pressure is neutralized. I rarely move the setting in my single place, and is set for neutral at about 100 mph and even slowing to 80 requires little stick pressure change. But I do like the AOA thing, as we have no cowl to peer over as a reference when getting the nose higher, and I think that a glide could be fine tuned with such a device. Hmmmmm, I see another project on the horizon. If I can make a homemade high powered LED landing light, why knot an AOA indicator device? =======================================================================
The Dynon Skyviews have an AOA option built into the software. The upgrade essentially consists of a replacment pitot-with-AOA-aperture, for $200 (unheated version). Someone told me this is also an option on the D60 I plan to get, but I don't see that confirmed on Dynon's website. I don't think there is much magic in the pitot - just a second tube, at the right angle, and with the right aperture should do it. The cost would not be the major hurdle, but they come in only straight and 90° versions.
Since our pitot tubes exit the nose at around 45°, then take a bend to horizontal, I was figuring I could simply sling another tube under it, but leave it straight. The fact that the two openings may be a couple inches apart should not matter. I would need to know what the approximate ratio in aperture or diameter is between the two openings on the Dynon pitot - approximate, because the built-in calibration option will take care of minor deviations from the Dynon version. Does anyone have a Dynon AOA pitot assembly they could measure for me?
I like the option to have an audible indicator (accelerating pings, or increase in pitch as I get closer to stall), since I plan to have my eyes outside the cockpit, especially during landing approaches.
Martin
eGull, plan to fly this summer
'Kess Blaswich' kessb@wavecable.com [Earthstar_Aircraft] <Earthstar_Aircraft@yahoogroups.com> 11:22 AM (1 hour ago)
to Earthstar_Airc.
Martin, I like your interest in an AOA indicator. The prices have come way down, and there are also some experimental projects to make one really cheap. I like you, don’t have an issue with the trim knob, even when I forget which way to turn it. Like Cessna’s just turn a little bit and see if the stick pressure goes with you or the wrong way, easy deal just turn the other way until the pressure is neutralized. I rarely move the setting in my single place, and is set for neutral at about 100 mph and even slowing to 80 requires little stick pressure change. But I do like the AOA thing, as we have no cowl to peer over as a reference when getting the nose higher, and I think that a glide could be fine tuned with such a device. Hmmmmm, I see another project on the horizon. If I can make a homemade high powered LED landing light, why knot an AOA indicator device? =======================================================================
The Dynon Skyviews have an AOA option built into the software. The upgrade essentially consists of a replacment pitot-with-AOA-aperture, for $200 (unheated version). Someone told me this is also an option on the D60 I plan to get, but I don't see that confirmed on Dynon's website. I don't think there is much magic in the pitot - just a second tube, at the right angle, and with the right aperture should do it. The cost would not be the major hurdle, but they come in only straight and 90° versions.
Since our pitot tubes exit the nose at around 45°, then take a bend to horizontal, I was figuring I could simply sling another tube under it, but leave it straight. The fact that the two openings may be a couple inches apart should not matter. I would need to know what the approximate ratio in aperture or diameter is between the two openings on the Dynon pitot - approximate, because the built-in calibration option will take care of minor deviations from the Dynon version. Does anyone have a Dynon AOA pitot assembly they could measure for me?
I like the option to have an audible indicator (accelerating pings, or increase in pitch as I get closer to stall), since I plan to have my eyes outside the cockpit, especially during landing approaches.
Martin
eGull, plan to fly this summer