
AIR CREATION Aérodrome de Lanas - 07200 AUBENAS - France
Tél.: 33 (0) 4 75 93 66 66 - Fax: 33 (0) 4 75 35 04 03 - Internet: www.aircreation.fr
Tension of the sail on the last battens of the wing tips.
It is easy to adjust the symmetry of the wing by differentially adjusting the tension of the sail on the last
batten wing tips (those that rest upon the plastic lugs on the leading edge). To do this, simply rotate the
plastic tip of the batten which is fitted with a thread. Increased tension raises the trailing edge of the wing
tip under consideration and reduces its lift. Decreased tension has the opposite effect. Action should be
taken in small corrections (1 turn on the tip batten) and simultaneously applied in opposite directions on
each side (+1 turn right, -1 turn left, for example). Check the results and increase the adjustment if
necessary.
Symmetric tuning of the tension of the sail on the last wing tip batten leads to a change in hands-off
cruising speed. Increasing tension leads to a slowdown, reducing it leads to a speedup. The maximum
tension allowed is obtained with 6 turns of tension on the batten tip, the minimum is 0 turns, standard
setting is 3.
Pivoting sleeves at the end of leading edges
The swivel sleeves were preset during the first factory tests of the wing, according to the torque of the
trike’s engine, and they are locked in position by a Parker screw. This position can be checked by means of
the positioning mark on the sleeve, which corresponds to a mark (0, +2.5, +5, -2.5, -5) on the scale stuck on
the end of the tube. A further correction is possible if the modification of the tension of the last batten wing
tips described in the preceding paragraph has not lead to the desired trimming (in case of adaptation to a
trike equipped with an engine whose torque is different, for example). Their differential rotation can be
used to correct an asymmetry of the wing. The result is comparable to that of the ailerons on a conventional
aircraft - lower the trailing edge produces more lift and raising it produces less.
For a wing with a left tendency, remove the self-tapping screws placed on the inside of the leading edges.
Turn each sleeve clockwise to achieve the next values (+2.5 on the right, -2.5 on the left) by forcing on the
fabric. After the adjustment, reassemble the screws, the battens, and the Velcro of the fabric closure. If the
correction is insufficient for a perfect tuning of the wing, repeat the process until you reach the correct
adjustment (maximum allowed: 10 mm difference right/left). Always rotate to the same value the sleeves
of each half of the wing. For effective flight operation, do not change the tension of the sail on the last
wing tip batten.
If the wing has a right tendency, the left sleeve should be rotated by 2.5 mm counterclockwise (towards +),
and the right sleeve by the same value in the opposite direction, 2.5 mm counterclockwise (towards -).
Pivoting the sleeves can also be used to fine tune the cruising speed. A joint rotation of the two sleeves of
2.5 mm upwards (towards +) slows the wing down by 5 km/h and speeds it up by 5 km/h for a 2.5 mm
rotation downwards (towards -). The usable range adjustment is limited to +2.5 and -2.5 mm. Beyond these
limits, performance and stability of the wing may be affected and unsightly wrinkles may appear on the
fabric of the wing tip.
Tension of the Sail
The tension of the sail at the end of the leading edges may be modified to counteract the effects of aging on
the sail, and improve its performance. This action is not to be considered before a minimum of 300 hours
of flight.
To make this adjustment, remove the tip fins, battens and the protective cap of the wing tip and rotate the
screw at the end of the sleeve with a 10mm wrench. Replace the cap, then adjust the tension of the sail on
the last straight batten of the wing tip due to changes in the position of the sail on the leading edge tubes
(the same value of increase in the length of the batten as the increase in tension on the leading edge).
Tighten up to a maximum of 5 turns (5 mm) and check by test flight. The cruising speeds will be increased
by about 3 km/h for 5 mm of additional tension but handling in roll will be slightly reduced. The maximum
allowed is 30 turns (30 mm) of total tension. The standard factory set tension of the new wing is 20 turns
(20 mm). The minimum allowed is 15 turns (15mm) of total tension.