Europa Aircraft XS Monowheel Motorglider, Owner'S Manual

Page: 61 / 96

You will notice (I hope) that as the trailing edge of the tailplane is raised the
trailing edge of the tab raises even further, the ratio is approximately 1.3 to
1. Therefore, when you have raised the trailing edge of the tailplane by 12°
the tab should have raised 15.6° relative to the tailplane or 27.6° from the
zero start position. A tolerance of + 2.4° and –1.2° of tab movement is
acceptable.
Similarly, moving the tailplane trailing edge down 4° from the zero
reference point the tab should move down approximately 5.2° relative to
the tailplane of 9.2° the zero reference position. A tolerance of +0.8° and
–0.4° of tab movement is acceptable.
Pitch trim control
Check that when pressing the bottom of the pitch trim rocker switch for
nose up trim the indicator needle moves up and the anti-servo/trim tab
moves trailing edge down. With the tailplanes held in the neutral position
operate the trim motor to confirm that the anti-servo/trim tab will move up
and down at least 6°.
Flettner strips
Flettner strips are fitted to the trailing edge of the tailplane tabs to assist in
damping out the short period oscillations in pitch.
A brief explanation
The Europa is fitted with a powerful all flying tailplane which is pivoted
close to its centre of lift. Having a tailplane alone would result in there
being little feed-back to the pilot, no matter how much work it was doing.
The pilot needs to feel a resistance, or stick force, relative to the work being
done by the tailplanes and this stick force should increase with an increase
in “g”.
XS Monowheel Motorglider Issue 2 Page 7 - 7
Owners Manual November 2006