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02-15-2016, 06:25 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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Is an AOA really necessary for a small GA aircraft that gives plenty of tactile feedback in VMC flying?
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02-15-2016, 07:43 PM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Absolutely. Only spent about $15 to install it, and my carrier landings have improved out of sight. 
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rgmwa
RV-12LR 912ULS
120346
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02-15-2016, 08:48 PM
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Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,070
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Absolutely. We have all heard about stalls on the base to final turn. I thought that I was too good of a pilot for it to happen to me. Well, it didn't. But it could have. Recently while making a steep turn from downwind to base, the Dynon D-180 yelled "STALL". I immediately pushed the nose down.
Some pilots do not realize that wings will stall at a higher airspeed when heavily loaded. That load can be from heavy people and baggage or from G-forces due to a steep bank or pull up from a dive. But the wings will always stall at the same AOA regardless of wing loading (with the exception of flap deployment). The Dynon has AOA capability. Why not utilize it? You too can make carrier landings like rgmwa without rolling off the deck. 
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Joe Gores
RV-12 Flying
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02-15-2016, 11:23 PM
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Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,065
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Why would anybody "make a steep turn from downwind to base" or steep turn anywhere in the landing pattern? Seems the pilot should exercise good judgement and plan turns with moderate bank angles, or so I was taught...
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Jim Stricker
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 622 
LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - USAAF 1st Lt. Captain B-17H
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02-16-2016, 07:03 AM
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Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,070
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Pilots make mistakes. Many (about 50 I think) crash and die each year. Why not install safety features like canopy switches, stall warning vane switches and AOA? Those who have installed the $15 AOA love it. I should have known better than to post my mistake online. 
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Joe Gores
RV-12 Flying
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02-16-2016, 07:11 AM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
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"Really necessary"? I suppose not, but then I guess neither is an altimeter or an airspeed indicator. I mean, you can look out the window to see how high you are and and feel what the plane is doing, right? Real pilots don't need those wussy instruments.
All kidding aside, if you do everything right you don't need AOA, or a stall warning. But if you do get a little too slow, or a little sloppy, or try a little too hard to salvage a misjudged crosswind approach, it can be very helpful in pointing out your folly before the situation gets too bad.I've had it "nudge" me on the base leg when I was paying more attention to my position than my airspeed and got a little slower than I intended. That happened a few knots before the buffet, which is what I want. Maybe I'm just the only one who hasn't perfected flying a stabilized approach, I don't know.
Being a very low time pilot as I am, and as I am still developing my skills, I actually find it most useful when I'm a foot or three above the runway. The AOA audio tones get progressively faster to give me a good indication of where I'm at to make a nice smooth touchdown, just at the stall. In ground effect I don't feel the buffeting that I do when practicing at altitude. Maybe if I had a few hundred more hours I wouldn't find it so useful.
The stall warning would squawk far too early and far too loudly. I know both could be adjusted, but in less time than it would have taken to adjust the tone and the angle of the switch I had AoA installed. AoA is a progressive and much more useful indication than the off/on nature of the stall warning switch.
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Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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02-16-2016, 03:14 PM
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Join Date: Dec 2015
Location: Houston, Texas
Posts: 57
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Quote:
Originally Posted by backcountry
Dynon has pitot probes that also includes the AOA pressure port.
They have the normal L shaped units but also have a unit that mounts strait out.
Has anyone looked at using this unit mounted through the propeller spinner?
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P/N 100532-000 Dynon strait pitot/AOA
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02-16-2016, 09:17 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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Jim,
To answer your question about a steep turn in the pattern, I sometimes use this to bleed energy if I'm high and hot.
Rich
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02-16-2016, 10:01 PM
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Join Date: Apr 2013
Location: Mequon, WI
Posts: 114
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AOA for SLSA ?
Are we allowed to put the AOA pitot on an SLSA?
Sounds like it would be great for a newby.....soloed and did cross country but not yet scheduled the Practical Test.
Tim
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Tim
RV-12. SLSA
Paid $50 for this year. Priceless !
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02-17-2016, 06:35 AM
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Join Date: Dec 2011
Location: Hackettstown, NJ
Posts: 459
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Quote:
Originally Posted by TLYNCH
Are we allowed to put the AOA pitot on an SLSA?
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Currently, per the regs the answer is no. Van's would have to approve that modification and as of right now they have not issued that as an approved change. They are generally very responsive to customer input and given that this is a sig. safety enhancement, I'd encourage all SLSA owners to formally request Van's to consider doing so.
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