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  #111  
Old 07-21-2013, 07:06 AM
Mich48041 Mich48041 is offline
 
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Location: Riley TWP MI
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Here us a suggestion for Dynon: Have an option to disable the AOA audio alarm when the GPS position is directly over a runway. The pilot would still be warned of an impending stall while maneuvering near an airport. But it would be quiet during the landing flare without annoying the pilot and scaring the passenger.
Joe Gores
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  #112  
Old 07-21-2013, 11:16 AM
AeroDog AeroDog is offline
 
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Location: New London, NC (near Charlotte), Boulder, CO
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Quote:
Originally Posted by Dave12 View Post
Bob, I don't remember what size it was, but I just ordered the rivet that Van's calls out for the static port and used it instead of the inflator needle. I then drilled the skin according to Master Thinker Joe's instructions. I used Tygon tubing and had to heat the tubing with a hair dryer to expand it enough to slide over the rivet. I really like the look, it's not even noticable. It works great. BTW, I used the fittings referenced earlier in this thread from McMaster and Carr and they worked very well.
Does the addition of this rivet have to wait until after the airworthiness certificate if I'm E-LSA? After all, the tubing will be inside the wing (unseen), and that wasn't there in the ASTM conforming prototype.

Jerre
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  #113  
Old 07-21-2013, 11:42 AM
NASA515 NASA515 is offline
 
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Location: Hansville, Washington
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Mel won't agree with me, but no DAR or FAA guy could find that rivet in a hundred years.

Actually, I installed my entire system and justified it by calling it "provisions for." So it wasn't an "actual installation." After I got my C of A, all that was required was activating it via the Skyview menu. Before that, it was "technically" not installed - or at least not available. The wings were on and the aft bulkhead installed, so the inspectors could see nothing - just like Sgt. Schultz.

In light of all the AOA stuff in the press, and the FAA's attempt to make installation on all airplanes as easy and no-permitting as possible, and the full availability of AOA in the SV ADAHRS and both the SV and D-180, it is very surprising that Vans has not incorporated this system into their Plans. It would be very simple.

I flew with Tony a week ago in N577RV and immediately noticed that the beeps in the D-180 were very different than the Skyview - they were very raucous, the SV's are quite gentle. His would be a pain, and I didn't even hear the lady yelling stall (he had that turned off.)

In all deference to San Antonio, my Mentor, his beeps started in the low 70s (kts) - I think he needs to do a recalibration - they were grossly out of range.

Altho the SV asks - or lets you - do the stall calibrations at various power and flap settings, I just did mine at Flaps 1, Idle power. That is my configuration in the deadly and much feared Base to Final turn that can result in that dastardly Stall-Spin. You can set the audio cutoff speed, Mich, so it won't beep during your landing flare.

The SV doesn't have Patty yelling STALL. It also, Tonio, doesn't have her yelling PULL UP, when you turn onto Base at Bremerton.............. What does "wifey" think of those????

Bob Bogash
N737G
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  #114  
Old 07-21-2013, 11:43 AM
Dave12 Dave12 is offline
 
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I installed mine several years after the inspection, but considering the D180 and S/V have the feature installed, I can't see it being a problem. I don't think my DAR would have even noticed it. Maybe Mel can comment?
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  #115  
Old 07-21-2013, 01:59 PM
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Tony_T Tony_T is offline
 
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Default More on disliking it...

Quote:
Originally Posted by NASA515 View Post
...snip...
I flew with Tony a week ago in N577RV and immediately noticed that the beeps in the D-180 were very different than the Skyview - they were very raucous, the SV's are quite gentle. His would be a pain, and I didn't even hear the lady yelling stall (he had that turned off.)

In all deference to San Antonio, my Mentor, his beeps started in the low 70s (kts) - I think he needs to do a recalibration - they were grossly out of range.

Altho the SV asks - or lets you - do the stall calibrations at various power and flap settings, I just did mine at Flaps 1, Idle power. That is my configuration in the deadly and much feared Base to Final turn that can result in that dastardly Stall-Spin. You can set the audio cutoff speed, Mich, so it won't beep during your landing flare.

The SV doesn't have Patty yelling STALL. It also, Tonio, doesn't have her yelling PULL UP, when you turn onto Base at Bremerton.............. What does "wifey" think of those????

Bob Bogash
N737G
Sigh.......Scott, I feel your pain. Ol' Bob can be as prickly as an ol' porcupine sometimes.

I guess I need to explain further. For those that don't know runway 19 at Bremerton National, after the turn to base leg you are headed for a mountain that is 1000' higher than you are. The gal in the Garmin 496, not Dynon's Chatty Patty, is actually Garmin's B**** Betty, and when she sees you headed for contours higher than you are, she calls "TERRAIN AHEAD, PULL UP". Now, Wifey, even tho' not a pilot and has no idea where in the plane Betty is hiding, understands completely the situation because the windscreen is full of trees, and is happy someone is looking out for us. Wifey also sees the runway threshold on the left and knows we will shortly turn towards it. No problemo.
Betty also calls "FIVE HUNDRED", usually in the middle of base leg.

With regard to my AOA calibration, you are supposed to do stalls clean, with flaps one and flaps full, and the instrument calculates the slowest speed that you will encounter before stalling, I think. I did not do the full flaps stall because I thought I wanted earlier warning. Need to do the calibration over, I guess.

I have the beeps to start at the bottom of the yellow chevrons: Now abeam the numbers down to 80 knots, flaps one. Down to 70 knots, turn to base, the AOA gives a couple of beeps in the turn. Down to 60 knots on base and I can initiate AOA beeps by pulling slightly on the stick. Turn to final at 60 knots and the AOA starts medium beeps, middle of the yellow chevrons as soon as the wings are not level. Wings level down to 55 knots, constant medium beeps. At flare and touchdown constant insistent beeps. I think my AOA is a bit out of calibration but not grossly so.

I don't mind that the AOA gives beeps in the 70 knot and 60 knot turns. It is warning me, you have initiated a turn at low airspeed. But I don't like the constant insistent beeps on level final, flare and touchdown.

I will redo the calibration procedure, but as said before, I don't think I will be happy with AOA in the 12. Maybe Van's had good reasons not to implement it in the build.

Now if Bogey will stop flying 737G long enough, maybe I can get a ride and see how SV works

Tony
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Last edited by Tony_T : 07-21-2013 at 02:14 PM. Reason: Further elaboration...
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  #116  
Old 07-21-2013, 02:44 PM
NASA515 NASA515 is offline
 
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Geez, you really know how to hurt a guy! Well, even Saints are not perfect.

The low 70s represent 1.6 to 1.7 or even higher Vstall - pretty high. Vref is supposed to be 1.3 Vstall - just ask those 777 guys in SFO who were trying for 137 kts, but wound up at 103.

For the RV-12 - that works out to 58 kts - and that's with Flaps UP -- AND max gross weight. Flying solo and with Flaps 2, that could be 10 kts slower.

Maybe a ride tomorrow, San Antonio??? If it ever clears up at PWT, that is - it's 1335 local right now and it's still not VFR.

Bob B.
N737G
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  #117  
Old 08-31-2013, 11:11 PM
Rodney Rodney is offline
 
Join Date: Oct 2012
Location: Friendswood, TX
Posts: 74
Default Clarification, please

Quote:
Originally Posted by Mel View Post
I built my own pitot/AOA tube and used a 60? delta as measured on Dynon's pitot.
It has worked flawlessly for several years.
I looking to add the -AOA functionality to my -7A. I understand that 30 degrees from horizontal works for the -12. Are you using 60 degrees from horizontal on the -6?

Thanks
Rodney
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  #118  
Old 09-01-2013, 03:12 AM
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Gagarin737 Gagarin737 is offline
 
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Quote:
Originally Posted by Rodney View Post
I looking to add the -AOA functionality to my -7A. I understand that 30 degrees from horizontal works for the -12. Are you using 60 degrees from horizontal on the -6?

Thanks
Rodney
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  #119  
Old 09-02-2013, 08:27 PM
AlanTN AlanTN is offline
 
Join Date: Apr 2011
Location: Linden, TN
Posts: 79
Default Annoying AoA Sound

For those who are annoyed by AoA warning sound, I wonder how it is being handled in the Icon A5. The AoA is a huge part of their design.
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  #120  
Old 09-02-2013, 08:39 PM
RFSchaller RFSchaller is offline
 
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I've flown a couple of turbine aircraft with AOA, but I never thought it was justified in light GA aircraft. Can somebody tell me what the value added is to justify the cost in an RV12? I'm not being snarky, I'm wondering if I'm missing something.
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