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Stall strips

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Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Thu Nov 13, 2008 3:16 am Post subject: Stall strips

I'm having to fit some stall strip on my plane to make the stall a

little more benign. It's not a Europa but I thought maybe someone on

this list could give me some tips an how to fit them, where, testing etc

Or is it just a case of stick em on and try things out?

Regards, Clive

Esqual VM1 3300

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ptag.dev(at)tiscali.co.uk
Guest

Posted: Thu Nov 13, 2008 8:12 am Post subject: Stall strips

Hi! Clive.

The Europa Build manual includes a mask for initial positioning of the

strips then you move them progressively up the inboard leading edge

about 1mm at a time and retest until you get the buffet where you want

it.

They are about 1/2" quadrant 6" long with the hypotenuse radiused

concave to fit snug on the  leading edge profile about 12" from the

fuselage side.

Gives a good wake up call at the right time.

Regards

Bob Harrison G-PTAG 



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houlihan(at)blueyonder.co
Guest

Posted: Fri Nov 14, 2008 1:41 am Post subject: Stall strips

Clive.

My understanding is that the stall strips are there to ensure the pilot 

gets tactile warning of airflow breaking up just prior to stalling. As 

far as I know they do not make the actual stall more benign. maybe 

someone who has flown with and without the strips could tell if they 

make a difference to the behaviour at the stall.



Tim H



James, Clive R wrote:

 	  Quote: 	
		   



 I'm having to fit some stall strip on my plane to make the stall a

 little more benign. 


	


 	  Quote: 	
		    Clive

 Esqual VM1 3300

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nwcmc(at)tiscali.co.uk
Guest

Posted: Fri Nov 14, 2008 2:01 am Post subject: Stall strips

Be careful on placement as they can cause the stall speed to be raised

which is not what you want. The other way to go is to fit a stall

warning device.



Nigel Charles



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rampil

Joined: 04 May 2007
Posts: 870

Posted: Fri Nov 14, 2008 6:08 am Post subject: Re: Stall strips

The mechanism of action of stall strips is to force the stall to

initial at a different section of wing.  It does so by forcing the AOA

to increase over a local region and thus must raise the intrinsic

stall speed.  The nature of the stall is effected by putting the strips inboard

and thus moving the initial stall from a possible outboard location 

(interfering with the ailerons), to inboard.



Thus strips increase stall speed and alter the stall flight characteristics

by design and intent.

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_________________
Ira N224XS

Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Sun Nov 16, 2008 2:21 am Post subject: Stall strips

Many thanks all for the information on fitting the strips. 

I know have a plan, what to look out for and what to avoid.

If I find anything of interest I'll pass it on.

I did suggest a warning device but the Chief engineer feels that the

strips are required even with an alarm device.

Regards, Clive

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davidjoyce(at)doctors.org
Guest

Posted: Sun Nov 16, 2008 2:48 am Post subject: Stall strips

Clive, LAA requirements are for stall strips OR an effective stall warner, 

assuming that the natural buffet does not give clear early warning of stalls 

in all set ups. As the stall strips cause a degree of degradation of low 

speed performance many people chose the stall warner. The one supplied by 

Europa is very effective and entirely unobtrusive, and has worked very well 

for me.

Regards, David Joyce, G-XSDJ

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pjeffers(at)talktalk.net
Guest

Posted: Sun Nov 16, 2008 8:48 am Post subject: Stall strips

Hi Clive,

 You will find that the LAA are quite happy for you not to  fit stall strips at all if you instal an approved electrical stall warning system.  The only other time that stall strips may be a desirable addition is if (and this is not uncommon particularly on classics) to reduce the tendancy for one wing to stall before the other ie excessive tendancy to wing drop at stall.

 Pete Jeffers

 

 

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grahamsingleton(at)btinte
Guest

Posted: Sun Nov 16, 2008 1:04 pm Post subject: Stall strips

James, Clive R wrote:

 	  Quote: 	
		   



 Many thanks all for the information on fitting the strips. 

 I know have a plan, what to look out for and what to avoid.

 If I find anything of interest I'll pass it on.

 I did suggest a warning device but the Chief engineer feels that the

 strips are required even with an alarm device.

 Regards, Clive

   

I think I agree with the chief engineer. A vicious stall has a very 
	


nasty bite and when the work load gets too high no amount of warning 

will be heard

Graham

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