Bruno,
Nice to here from you. I will send you my test report.
I have a manufacturer which supplies me with clear vinyl contoured VGs
that are superb and are arced on the bottom for a good fit. They glue
on with some supplied gel glue and are very easy to install, allow some
repositioning and really stick once cured without damaging the paint. I
made paper templates for ease of alignment. I also experimented with
different positions, number and placement which is only in the flight
test data.
The controllability at low speed (clean at 45 KCAS and dirty at 40) with
a well rigged plane is superb. The cost is very low in comparison to
the aftermarket VGs available and the speed reduction at cruise is not
onerous (5 knots fixed pitch and 10 for a very clean constant speed
airplane.) I developed them to meet the Light Sport Criteria here in
the US.
If I were flying a Classic especially into a short field, I would use
them, as the approach speed at 55 KIAS is quite stable and forgiving,
allowing for a more confident stable approach to a landing which is
necessary in the mono. Although the mono takeoff roll would not be
improved due to the deck angle on the ground, the confidence of a easily
controlled mono on final is what makes for a good consistent landing.
One caution though is that the VGs give such good response and feel that
one may allow his airspeed to bleed well below normal or safe region as
the plane feels great, but is sinking like a rock, especially in the
steep final turn. When I had a couple clients fly with the VGs, I
called it falling with style (Like the movie line) as he allowed his
airspeed in the final turn to drop to 40 and he was in full aileron
control and didn't notice the sink. Of course when he tried to arrest
the sink, the trouble began as he was into the stall. This is common
with aircraft equipped with slats, slots or VGs. So mind the airspeed
otherwise the client will be below stall in a sinking low AOA turn and
get into trouble...
I am tied up with two planes in flight test and some poor radio/intercom
performance on one plane (I didn't wire the radios and now must look for
the ailment) and of course flight testing with the owner on his new
systems, checking for setup changes, programming preferences, etc.
When I get into the shop on Monday, I will pull the flight test out of
the archive and send it too you via email. Otherwise I have a typed up
mod with the final setup and I do have the kits on the shelf.
Regards,
Bud
----- Original Message -----
From: UVTREITH<mailto:uvtreith@t-online.de>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Thursday, May 31, 2012 12:03 PM
Subject: Europa-List: Vortex Generators
Hi Family,
An Austrian Monowheel Classic owner is thinking about to install on
his wings Vortex Generators?
Is there somebody who had made that and what was the result out of
this?
Is it helpful or will this destroy the benefit of the Europa wings?
Some wise and technical information would be helpful - thank you.
Best Regards,
Bruno Reith
http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N
avigator?Europa-List>
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on>
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