If there is any twist in the wings , one is likely to stall before the other
causing a wing drop and then a spin.
The stall strips are used to ensure both wings stall at the same time. I
believe they also cause pre stall buffet, warning the pilot of an impending
stall.
Thats the theory anyway.
We dont have them fitted so cant comment any further - do have a stall
warner though.
----- Original Message -----
From: "William Daniell" <wdaniell@etb.net.co>
Sent: Tuesday, June 19, 2007 2:55 PM
Subject: RE: Europa-List: 180 turns
>
> Ok forgive my ignorance but what effect do stall strips have?
>
> (I think) I know that they stall the root first...but then what happens?
>
> I remember reading a book by I think chuck yeager or one of his buddies
> who
> said that the mustang used to snap roll when stalled in a turn...
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Carl
> Pattinson
> Sent: Tuesday, June 19, 2007 08:42
> To: europa-list@matronics.com
> Subject: Re: Europa-List: 180 turns
>
> <carl@flyers.freeserve.co.uk>
>
> To a degree it depends on the direction of the turn and whether flaps up
> or
> down.
>
> Most Europas tend to stall one wing down (ours is to the left). This can
> be
> minimised by using stall strips but they cause other problems.
>
> Most likely outcome is a spin or incipient. This will by accompanied by a
> considerable loss in height.
>
> It is also dependent on the method of recovery used. Inexperienced pilots
> try and recover an incipient spin with ailerons - its an instinctive
> reaction. This will make the situation worse and may cause a spiral dive.
>
> But then everyone knows you should use rudder to correct a spin - dont
> they?
>
> I have deliberately stalled a Europa in a turn and it is interesting (at
> 4,000ft !!!) - you definitely lose a lot of height.
>
> ----- Original Message -----
> From: "William Daniell" <wdaniell@etb.net.co>
> To: <europa-list@matronics.com>
> Sent: Tuesday, June 19, 2007 2:16 PM
> Subject: RE: Europa-List: 180 turns
>
>
>> <wdaniell@etb.net.co>
>>
>> What happens when you stall a Europa in a turn?
>>
>> -----Original Message-----
>> From: owner-europa-list-server@matronics.com
>> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Gilles
>> Thesee
>> Sent: Tuesday, June 19, 2007 06:27
>> To: europa-list@matronics.com
>> Subject: Re: Europa-List: 180 turns
>>
>> <Gilles.Thesee@ac-grenoble.fr>
>>
>> William Harrison a crit :
>>> John Brownlow, who did my conversion training for the Europa,
>>> told/showed me that you can do a safe 180 turn back from 300 feet
>>> (much lower than for many types). I practised a few times. I think
>>> I'll practise a few more times.
>> William and all,
>>
>> Sorry to hear about this sad loss.
>>
>> The first thing an instructor shows, is that it takes more than a 180 to
>> turn back to the runway : it is safe to assume it takes one 270 degree
>> turn in one direction, and 90 degrees in the other direction to land
>> back on the same runway. 360 degrees total. You also need some height to
>> straighten the wings and flare.
>>
>> 360 degrees is twice what many pilots feel is necessary, hence the
>> dramatic turn of events when they realize they still have lots of
>> distance to travel to make the intended threshold. Most "turn back"
>> crashes occur AT THE END of the maneuver, when the ground is rushing
>> toward you at 1000 ft/min, and you are below tree tops, and still trying
>> to make that out-of-reach runway.
>>
>> Of course, if you are far enough, you can replace this 270+90 by
>> something somewhat resembling a tear drop. But if you are far enough
>> from the runway, you also have height and time to make sound decisions.
>>
>> The second thing we show our students, is how much height it takes to
>> perform a power-off full 360 from a climb attitude at slow speed, with
>> flaps down and prop in fine pitch. 300 feet seems very low, especially
>> considering some Europas have less than gentle stall characteristics in
>> a turn, as evoked in last year postings.
>>
>> I suggest Europa pilots do the maneuver (at a safe altitude) and report
>> the recorded loss of height for the education of us all.
>>
>> My sympathy and thoughts go out to the families and friends.
>> Regards,
>> --
>> Gilles Thesee
>> http://contrails.free.fr
>>
>>
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