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AOA with Dynon

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chris Sinfield

Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia

Posted: Fri Jul 29, 2011 5:50 pm Post subject: AOA with Dynon

Hi 

Has anyone successfully used their original Zenith supplied Static probe to get the Dynon D100 Angle of Attack indication to work? 



And if you did how did you do it and what angle was it bent down to??



Or do you have to bite the bullet and buy Dynon's Unheated probe???? 



Chris..

don.honabach(at)pcperfect
Guest

Posted: Sat Jul 30, 2011 2:38 pm Post subject: AOA with Dynon

Chris -



I'm using Dynon's Unheated Probe for the AOA on my D180. Works well. Never tried the ZAC one.



Thanks,

Don



--

Alan Smith

Joined: 10 Jan 2006
Posts: 12
Location: Anderson, Missouri

Posted: Sun Jul 31, 2011 1:26 pm Post subject: Re: AOA with Dynon

You must have twp pressure ports for the angle of attack to work.

There is a  drawing on the Dynon web site that may help.



AL Smith

_________________
alschief

merlin

Joined: 05 Oct 2008
Posts: 15
Location: Fair Play, S.C.

Posted: Sun Jul 31, 2011 1:55 pm Post subject: Re: AOA with Dynon

Check with Gus at "flywithgus.com" or call him.

I've seen a video on how he does this with the supplied pitot tube. It may be on the EAA website.

chris Sinfield

Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia

Posted: Wed Aug 03, 2011 1:32 am Post subject: Re: AOA with Dynon

anyone got a good Email address as his "flywith gus" one just bounces back? 

Chris

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Wed Aug 03, 2011 6:58 pm Post subject: Re: AOA with Dynon

Chris,



The angle of attack uses two pitot pickups, one is straight into the wind, the other is at a forty-five degree angle to the wind.  The hole sizes are the same ( tube ID ) and it works by pressure differential.  You can add a tube to the straight tube as long as you bend the new tube so the end is presented to the wind 45 degrees away from the original tube.

_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

chris Sinfield

Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia

Posted: Thu Aug 04, 2011 5:03 am Post subject: Re: AOA with Dynon

So Ron

if I bend the bottom tube of the Zenith probe down 45 Deg and use another static vent  source from the fuse sides then it should work if connected to a Dynon?

Chris

psm(at)att.net
Guest

Posted: Thu Aug 04, 2011 5:38 am Post subject: AOA with Dynon

Hi Chris,



I have a Lift Reserve Indicator (LRI) I built while waiting for one of 

my sub-kits to arrive.  It seems to work in a similar fashion to the 

Dynon AOA.  It uses a metal divider to choose which of two input ports 

gets the larger amount of air pressure - depending on the attitude of 

the airplane.  Rather than having one direct pitot tube and one at a 45 

degree angle it has one input pointed up and another pointed down.



I mentioned all that to allow me to point out that the idea works just 

fine but the actual implementation needs to be adjusted and calibrated 

to be useful in flight.  I have an analog gauge that shows the 

differential pressure.  Dynon just shows a few points of data which 

(presumably) show similar information.  You might need to tweak the 

angle of the second pressure input tube to get a reading on the Dynon 

that is useful.



Paul

Camas, WA



On 8/4/2011 6:03 AM, chris Sinfield wrote:

 	  Quote: 	
		   So Ron

 if I bend the bottom tube of the Zenith probe down 45 Deg and use another static vent  source from the fuse sides then it should work if connected to a Dynon?

 Chris

mcr01steiner(at)mac.com
Guest

Posted: Thu Aug 04, 2011 6:56 am Post subject: AOA with Dynon

Sam Buchanan successfully used a different pressure source for the Dynon AOA indicator:



http://www.vansairforce.com/community/showthread.php?t=36346



How to build your own is described here, ( I think this is the one Paul is referring to):



http://www.pegazair.on-the-net.ca/ClareSquared/pictures/airframe/lri.htm 



It seems  a similar probe with only the lower port, mounted at an appropriate location, should work with the Dynon.



Christoph



 	  Quote: 	
		  --> Zenith601-List message posted by: Paul Mulwitz <psm(at)att.net (psm(at)att.net)>



Hi Chris,



I have a Lift Reserve Indicator (LRI) I built while waiting for one of my sub-kits to arrive.  It seems to work in a similar fashion to the Dynon AOA.  It uses a metal divider to choose which of two input ports gets the larger amount of air pressure - depending on the attitude of the airplane.  Rather than having one direct pitot tube and one at a 45 degree angle it has one input pointed up and another pointed down.

...

Paul

Camas, WA



On 8/4/2011 6:03 AM, chris Sinfield wrote:

 	  Quote: 	
		  So Ron

if I bend the bottom tube of the Zenith probe down 45 Deg and use another static vent  source from the fuse sides then it should work if connected to a Dynon?

Chris

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Fri Aug 05, 2011 5:32 pm Post subject: Re: AOA with Dynon

 	  chris Sinfield wrote: 	
		  So Ron

if I bend the bottom tube of the Zenith probe down 45 Deg and use another static vent  source from the fuse sides then it should work if connected to a Dynon?

Chris 	




Yep!

alsmith

Joined: 04 Oct 2009
Posts: 12

Posted: Fri Aug 05, 2011 6:06 pm Post subject: Re: AOA with Dynon

It takes two Ram Air inputs and one static

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