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Angle of attack

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Dan Wilde

Joined: 05 Jun 2011
Posts: 34

Posted: Mon Mar 12, 2012 9:15 am Post subject: Angle of attack

Has anyone measured the maximum angle of attack at stall speed?  Zenith 

literature says close to 30 degrees but it seems to me it must be 

greater (that ole perception vs reality is probably messing with my mind).



Dan Wilde

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dashwoodlock(at)yahoo.ca
Guest

Posted: Mon Mar 12, 2012 1:46 pm Post subject: Angle of attack

i have a weather vain style stall indicator out on the wing... i havn't measured it but is looks about 30deg. is very acurate predictor of aoa at stall.

 



    

From: Dan Wilde <stolpilot.wilde(at)gmail.com>

To: Zenith701801-List(at)matronics.com 

Sent: Monday, March 12, 2012 1:14:32 PM

Subject: Zenith701801-List: Angle of attack

--> Zenith701801-List message posted by: Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)>



Has anyone measured the maximum angle of attack at stall speed?  Zenith  literature says close to 30 degrees but it seems to me it must be greater (that ole perception vs reality is probably messing with my mind).



D=  --> http://www.matronics.com/Navigator?Zenith701801-Listt; http://forums.matron;                     &nbatronics.com/contribution" target=_blank>http://www.matronics.com/contrib===============

 [quote][b]

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Dan Wilde

Joined: 05 Jun 2011
Posts: 34

Posted: Tue Mar 13, 2012 10:25 am Post subject: Angle of attack

On 3/12/2012 9:00 PM, John Marzulli wrote:      	  Quote: 	
		  I've gotten to 45 in a power on configuration. It was       the one time I have ever had a breaking stall with my 701.

       

       BTW: STOL craziness from Saturday:

       

       http://youtu.be/9pfjVtmXICs

       

              John Marzulli

       

       http://MarzulliPhoto.net/

       http://701Builder.blogspot.com/

       

       

       On Mon, Mar 12, 2012 at 10:14 AM, Dan         Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)>         wrote:

          	  Quote: 	
		             --> Zenith701801-List message posted by: Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)>

           

           Has anyone measured the maximum angle of attack at stall           speed?  Zenith literature says close to 30 degrees but it           seems to me it must be greater (that ole perception vs reality           is probably messing with my mind).

           

           Dan Wilde

           

             	
       

     	
     

     John:  I have also gotten to a crazy angle in a power on stall     attitude, I just didn't know how steep the angle.  Had to keep a lot     of rudder in to keep it from falling off on a wing.  When doing this     maneuver are we technically in violation of the FARs since it is     over 30 degrees pitch and most of us probably don't have a parachute     on board?

     

     Dan Wilde

     

      [quote][b]

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john.marzulli(at)gmail.co
Guest

Posted: Tue Mar 13, 2012 11:28 am Post subject: Angle of attack

I was still in my 40  hours when I did it, thus carrying a chute on my back.

John Marzulli



http://MarzulliPhoto.net/

http://701Builder.blogspot.com/

  



On Tue, Mar 13, 2012 at 11:24 AM, Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)> wrote:

[quote]                    On 3/12/2012 9:00 PM, John Marzulli wrote:      	  Quote: 	
		  I've gotten to 45 in a power on configuration. It was       the one time I have ever had a breaking stall with my 701.

       

       BTW: STOL craziness from Saturday:

       

       http://youtu.be/9pfjVtmXICs

       

              John Marzulli

       

       http://MarzulliPhoto.net/

       http://701Builder.blogspot.com/

       

       

       On Mon, Mar 12, 2012 at 10:14 AM, Dan         Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)>         wrote:

          	  Quote: 	
		             --> Zenith701801-List message posted by: Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)>

           

           Has anyone measured the maximum angle of attack at stall           speed?  Zenith literature says close to 30 degrees but it           seems to me it must be greater (that ole perception vs reality           is probably messing with my mind).

           

           Dan Wilde

           

             	
       

     	
     



     John:  I have also gotten to a crazy angle in a power on stall     attitude, I just didn't know how steep the angle.  Had to keep a lot     of rudder in to keep it from falling off on a wing.  When doing this     maneuver are we technically in violation of the FARs since it is     over 30 degrees pitch and most of us probably don't have a parachute     on board?

     

     Dan Wilde

     

       	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




[b]

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dashwood

Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada

Posted: Tue Mar 27, 2012 5:16 pm Post subject: Re: Angle of attack

this is the indicator i use... not very helpful on landing but very useful in flight when just cruising on the edge.

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_________________
Ross Alexander: CH701 driver 912ul 788tt
It only takes two things to fly, airspeed and money

dons701

Joined: 22 May 2009
Posts: 80
Location: Hershey, PA

Posted: Sun Apr 01, 2012 4:49 pm Post subject: Re: Angle of attack

Nice device and picture. Looks like my thumb nail that needs a trim

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_________________
Zenith 701 #76120
Jabiru 2200A #2456 95 hours
Sensenich Wood 64-PJ-36 Prop

dashwood

Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada

Posted: Sun Apr 01, 2012 6:08 pm Post subject: Re: Angle of attack

was just trying to give it some scale. i work outside all winter... -20F is a killer on the nails... everything you touch breaks them at the stub... like i said this gizmo is very helpfull . i don't get much buffeting prior to stall...  and if you just want to cruse on the edge looking at nature...just set to redline and it works...  when landing it is too much out of the line of sight and not worth looking at... you fly to flair and chop power..or giver  a little to slow a particularly fast decent.... always too busy to look out side window . you could almost place a protractor on the comp screen to check aoa.... some where asking at ??? deg... level flight is always at green line .. full stall happens at red..

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_________________
Ross Alexander: CH701 driver 912ul 788tt
It only takes two things to fly, airspeed and money

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