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Re: Europa-List: Re: Turning Stall

Subject: Re: Europa-List: Re: Turning Stall
From: JEFF ROBERTS <jeff@rmmm.net>
Date: Tue, 19 Jun 2007 13:57:34

As I'm sure all of us following this tragic thread are... I too have 
concerns about these accidents having occurred back to back. My wife 
who does not like to fly is asking me why I would want to continue my 
adventure. As I have just explained to her these incidences are 
completely different and as these friends lost would want us to, we 
should all use these to become safer pilots.
As I was turning final at my first Sun-N-Fun in April, I over shot the 
turn and had to over correct it with a steeper bank. Had I been slow, 
well lets not go there. I was like most caught up in the moment, had an 
RV-8 in front of me and a 172 behind.  There is no doubt in my mind 
that even the most experienced among us (And I'm Not One Of Them) have 
the ability to make the wrong decision at that defining moment. I only 
know one who was perfect in all his decisions.
For that reason I have followed the advice of my instructor and that is 
to keep the speed to where it isn't an issue until I'm on final and 
level. Calculating winds, weight, and other issues should be for 
another time and not at the instance of when that moment hits as we are 
all human. As another Europa flyer showed me once, flaps coming down 
are reserved for final and seem to work well that way.
On take off  going back was always forbidden in my training and the 
best field in front or sides is the only way to go under 1000 feet. 
Many times my instructor pulled the power below that and if I didn't, 
he pushed the 150 over to get speed before we looked for a field he 
did. Lose power get your speed find a field he always said.
I am very saddened for both of these families and want to offer my own 
condolences. I'm sure the ones we lost would now be glad to see us 
sharing these Ideas and in the same becoming safer at what we love.
Jeff Roberts
N128LJ


On Jun 19, 2007, at 12:01 PM, Robert Borger wrote:

>
> Andrew,
>
> You wrote:
>
> "I have learned from experience that stall characteristics are very
> specific to each airframe. There are only generic similarities across
> the same model. Even in the ubiquitous Cessna 172, the stall
> characteristics may appear to be consistent during an imminent stall,
> but if you push it deeper into a stall, or an uncoordinated stall, the
> characteristics are not at all similar. On an experimental
> construction, I would expect these variations to be more drastic than
> in production models.
>
>
> As soon as I heard about this accident, I looked at the google
> satellite map of Livermore airport and wondered why he was tempted to
> make a 180. If the golf course had people in it that might be one
> reason, but it looks like there are quite a few cow pastures slightly
> left of course, and some shallow lakes (reservoirs?) further left."
>
>
> Yes, that's why I limited my comments to only those aircraft in which 
> I had actually performed the various turning stalls.  And I explicitly 
> stated that none of them had laminar flow airfoil sections.  Those 
> aircraft which I had tested where simple, basic and very well behaved 
> in most situations.  (Don't secondary stall an older C-150 with the 
> landing light in the wing unless you have lots of altitude.  It snaps 
> to an instant spin.)  Even the simplest and nicest have a nasty stall 
> in a slipping turn.  Laminar flow sections can be notorious in their 
> stall characteristics.  That is also why I will be investigating the 
> stall characteristics of N914XL in  straight and level, coordinated 
> and uncoordinated turns, clean and dirty, various weights and CGs, 
> etc. with plenty of altitude and in tiny increments to look for 
> behavior defining the edges of the flight envelope.
>
>
> I too am baffled as to why a pilot with that level of experience would 
> try to turn back when suitable areas to put it down are available 
> within 30 degrees of the departure heading.  All I can think of is 
> that he had practiced the 180 turn to see how much altitude would be 
> lost and had established such a turn-capable altitude.  (That attitude 
> seems too be all too prevalent in some comments)  Then when the engine 
> quit, he was above that altitude so he turned.  Unfortunately, he did 
> not account for the extra weight of the passenger or he did not 
> account for the fact that the turn is in actuality much greater than 
> 180 or different density altitude or some other factor we don't know.
>
> I try to learn from every accident.  Learning from Europa accidents 
> has been too frequent recently.  My heart goes out to all those who 
> have been affected by the latest accidents.
>
> Good building and great, SAFE, flying,
> Bob Borger
>
>
Jeff
Eagleville Marketing Group / EMG
488 Beasley RD.
Eagleville TN 37060

615-355-7575 Office
615-406-8651 Cell
615-534-1082 Fax



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