Frans, For the XS mono kit 402 the manual says the aim is to get the flaps
to extend to 26-27 degrees. The supplied Europa final inspection sheet
stipulates minimum 25 and max 27 degrees. Hope this helps. regards, David
Joyce
----- Original Message -----
From: "Frans Veldman" <frans@paardnatuurlijk.nl>
Sent: Monday, August 04, 2008 11:22 PM
Subject: Europa-List: Maximum flap extension?
> <frans@paardnatuurlijk.nl>
>
> Hi,
>
> I just finished installing the flap drive mechanism. My assumption was
> that the strap on the outboard flap hinge determined the maximum flap
> extension, i.e. 30 degrees. So when I installed the flap drive tube, I
> made slots in the fuselage to accommodate the entire range for the flaps.
>
> To my dismay, after installation of the actuator, the flaps only use 2/3th
> of the available range. The actuator reaches its limit far before the
> strap of the outboard flap hinge reaches its limit.
>
> To be sure, I measured the difference in angle of the flap, between fully
> retracted and "fully" extended. This is only 24 degrees! I confirmed this
> with a digital gauge. Now I don't see how I can have done something wrong
> with this, as long as you don't cut the hinges or reshape the flap drive
> tube, you can't alter the maximum flap extension.
>
> As a further test, I temporarily attached the Europa flap indicator decal
> on the flap and wing, and to my surprise this decal tells me that the
> flap, fully extended, reaches 30 degrees...
>
> Several questions cross my mind:
>
> 1) Is my method to measure the maximum flap extension correct? Does "30
> degrees flaps" actually mean that the flaps have rotated 30 degrees?
>
> 2) Has anyone else actually measured the maximum flap extension? The build
> manual doesn't tell you to measure it, but I suspect I'm not the only one
> who wants to measure everything related to the controls. Or does everyone
> else just trust the Europa flap indicator decal?
>
> 3) Why do I only get 24 degrees of flap extension? Maybe on the mono wheel
> it is reaching 30 degrees, but on the tri-gear the electrical actuator is
> just too short so it limits the flaps to 24 degrees?
>
> 4) If I drill another hole in the lugs of the flap drive tube, closer to
> the rotation center (i.e. truncating the lever action of the lugs) I will
> get more flap travel (at the cost of a slight reduction in flap drive
> power). Anyone tried this? It seems to me a safe way to fix this problem.
>
> 5) What is actually the maximum flap extension one can obtain? I suspect
> that it is possible to actually get more than 30 degrees if the full
> travel allowed by the outboard hinges is fully used. (I'm flying a Cessna
> with 40 degrees flaps, and I really love these 40 degrees flaps). Anyone
> tried/implemented this?
>
> Thanks in advance for any answers.
>
> Frans
>
>
> Visit - www.EuropaOwners.org
>
>
>
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