Angle of Attack indicator
- Thread starter Stephen
- Start date
Gilbert Pierce
MEMBER
Germantown, Tennessee 01TN
Rene
MEMBER
Da Yooper
I thought that a heads-up AOA indicator was your sight picture to the horizon over the cowling.
Stephen
FRIEND
Lopez Island, WA
Cute. This works fine straight and level in flat terrain. Less so in steep turns especially down in canyons. Also, lots of turn to final stalls and moose stalls. I'm curious to know if anyone is using an AOA. I helped pull two out of a Mooney who didn't survive a turn to final, not long ago. One was a CFI.I thought that a heads-up AOA indicator was your sight picture to the horizon over the cowling.
Stephen
FRIEND
Lopez Island, WA
Thanks Gilbert.
I read that the AV30 is a probless AOA. Talking to Mark at Alpha, they're prob accommodates for bank angle and flap setting. Mark who owns the company says that they will not sell panel mount AOA's. Because people don't use them. They have a see through HUD AOA, that mounts on top of the instrument panel. It's has color symbol view system. It looks interesting.
andya
MEMBER
UT47
My opinion only. I have flown AOA on military and corporate jets (swept wings). The amount of
pitch angle change slowing from slow cruise to just above stall speed is a fairly large change measured in
degrees of pitch. The type wing associated with our planes has less angle of attack change in degrees of pitch
over a similar indicated airspeed change and does not seem to be as much as the the swept wing versions.
AOA change with the our wing doesn't seem to make any serious change until get close to the stall speed and
if you are bouncing around a little or not being extremely smooth in pitch control the AOA jumps fairly quick
and maybe even over shoots a bit as your are trying to slow trying to reduce your speed at a slow rate. I have
found when I use power and pitch change in the slow down phase and just use IAS it turns out to be a better (ride)
and smoother. I also have had enough experience in my Pacer that I can feel when I am getting close to an
angle of attack that would be close to wing stall just from feeling the response to control pressures regardless of
bank angle. After playing with the AV30 AOA, and because of the "straight wing and Clark airfoil" we have, I am even
wondering if a mechanical probe mounted on the wing using some type electrical rheostat wired to an appropriate
indicator would be much better.
Don't hold back, if you have good reason to take shots, lock and load.
pitch angle change slowing from slow cruise to just above stall speed is a fairly large change measured in
degrees of pitch. The type wing associated with our planes has less angle of attack change in degrees of pitch
over a similar indicated airspeed change and does not seem to be as much as the the swept wing versions.
AOA change with the our wing doesn't seem to make any serious change until get close to the stall speed and
if you are bouncing around a little or not being extremely smooth in pitch control the AOA jumps fairly quick
and maybe even over shoots a bit as your are trying to slow trying to reduce your speed at a slow rate. I have
found when I use power and pitch change in the slow down phase and just use IAS it turns out to be a better (ride)
and smoother. I also have had enough experience in my Pacer that I can feel when I am getting close to an
angle of attack that would be close to wing stall just from feeling the response to control pressures regardless of
bank angle. After playing with the AV30 AOA, and because of the "straight wing and Clark airfoil" we have, I am even
wondering if a mechanical probe mounted on the wing using some type electrical rheostat wired to an appropriate
indicator would be much better.
Don't hold back, if you have good reason to take shots, lock and load.
Graham, Texas, United States
I have flown a lot of the Cub Crafters airplanes with the G3X and AOA. Has the magnetometer mounted in the wing and uses a series of beeps that get closer together as you get closer to the stall. Not being intimate with the airplane like I am my Super Cub I did find it useful while flying in the hills and back country strips of Arkansas. Just another tool in the tool box.
Stephen
FRIEND
Lopez Island, WA
Thanks Andy and Steve, just the kind of real experience feedback I was hoping for.
The Alpha prob has two air inlets and feeds that measure differential pressure. It is mounted under the wing outboard a bit. I assume the AOA accuracy depends on the fine-tuning during the set-up. It has aural feedback if chosen. Although, their main feature is the HUD and the color display.
Interestingly, the FAA approved this installation as minor in writing, therefore it's a log book entry by an AP.
I know the Pacer is not easy to stall, even at a 30 bank it takes a lot of pull. It does happen and can be exciting if the plane is not coordinated with the ball centered.
The Alpha prob has two air inlets and feeds that measure differential pressure. It is mounted under the wing outboard a bit. I assume the AOA accuracy depends on the fine-tuning during the set-up. It has aural feedback if chosen. Although, their main feature is the HUD and the color display.
Interestingly, the FAA approved this installation as minor in writing, therefore it's a log book entry by an AP.
I know the Pacer is not easy to stall, even at a 30 bank it takes a lot of pull. It does happen and can be exciting if the plane is not coordinated with the ball centered.
Graham, Texas, United States
That is the way it is installed in the CC stuff as well with pitot and static and yes the set up is the key as I understand it.
