Bill Phillips
Well Known Member
I mentioned a week ago that I built and installed an AOA LRI in the Bluebird and had several PM asking how for less than $100. Non electric and when fine tuned very accurate. Never worry about DA or stall speed again. So I'll write it out and I have five photos of what it looks like wing and panel.
Order online the gauge box as is shown. I think it cost $48. It is an auto type air pressure gauge. Comes with a bracket that works fine. Online find the free AOA LRI face page and print it out. Sheet shown in color photo. Unscrew the face bezel of the gauge and glue the cut out AOA you want onto the white face. Note the pin holes must line up to be accurate.
Order from Dynon their AOA probe. Can't remember what I paid, but was not much. Buy two brass fittings from the aviation section at Home Depot and sufficient tubing to get from the back of the panel to the first wing inspection panel hole on the left wing.
I cut a hole in the panel face. As an auto gauge it is not aviation standard. I think it was 2 5/8 inch. Connect tubes to the back of gauge and run them to the wing.
Remove the wing access panel, cut a hole and rivet two L brackets to sandwich the probe hub. Don't tighten too tight as probe is plastic. Mine was set at about 16 degrees to start with, but I adjusted it a bit as I fine tuned the stalls. Attach all and fly.
If your AOA does not show any movement reverse the tubing at the probe. (ask me how I know) Fly up and do power off stalls to see where the arm is at break. Land and adjust the angle of the probe. It took me seven flights to get it just right.
This is the second AOA I assembled for plane I built and believe they make me a safer flyer. There are five photos attached here if I did it right. If you want to call me at 478-731-9678
http://s1306.beta.photobucket.com/user/wphillips1/library/
Order online the gauge box as is shown. I think it cost $48. It is an auto type air pressure gauge. Comes with a bracket that works fine. Online find the free AOA LRI face page and print it out. Sheet shown in color photo. Unscrew the face bezel of the gauge and glue the cut out AOA you want onto the white face. Note the pin holes must line up to be accurate.
Order from Dynon their AOA probe. Can't remember what I paid, but was not much. Buy two brass fittings from the aviation section at Home Depot and sufficient tubing to get from the back of the panel to the first wing inspection panel hole on the left wing.
I cut a hole in the panel face. As an auto gauge it is not aviation standard. I think it was 2 5/8 inch. Connect tubes to the back of gauge and run them to the wing.
Remove the wing access panel, cut a hole and rivet two L brackets to sandwich the probe hub. Don't tighten too tight as probe is plastic. Mine was set at about 16 degrees to start with, but I adjusted it a bit as I fine tuned the stalls. Attach all and fly.
If your AOA does not show any movement reverse the tubing at the probe. (ask me how I know) Fly up and do power off stalls to see where the arm is at break. Land and adjust the angle of the probe. It took me seven flights to get it just right.
This is the second AOA I assembled for plane I built and believe they make me a safer flyer. There are five photos attached here if I did it right. If you want to call me at 478-731-9678
http://s1306.beta.photobucket.com/user/wphillips1/library/
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