Air Creation FUN 450 Instruction And Maintenance Handbook - Page 9

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d) Adjustments

− Hang point position

Move the hang point piece along the keel to adjust the hang point position. The nylon locking rings must be

fixed according to the chosen hanging point position (3 positions available). The hand-off cruising speed

increase of about 5 km/h (3 mph) per centimeter when moving the hang point forward and vice versa. Each

position may be used. It only changes the cruising speed, without any influence on stability and

performances. However, the hang point should never be placed to its most backward point on the keel

if the total hanged load exceeds 772 lbs (350 kg). The cruising speed would be then too close to the

stalling speed of the wing and make pilotage difficult. During the first flights, it is better to leave the hang

point position in its original adjustment, which has been chosen to take the aircraft easily in hand. This

standard position corresponds to the second position, beginning from the front

Warning : Any change in the hang point position means a variation of the A-frame angle and therefore a

different tension of the lower longitudinal cables. Various adjustment holes are designed in the cable

fixation rail at the nose of the wing, allowing them to keep a correct tension whichever hang point position

chosen.

− Position of the pivot sleeves at the leading edges tips

The two bolts pivoting sleeves have been originally designed for the bolts fastening the sail to be in line

with the keel. Their differential pivoting should only be used for rectifying a tendency to turn on one side.

Once adjustment has been made, mark with a felt-tip pen the leading edge link with the sleeve or secure it

with a pop rivet in order to find the correct position again at each assembling. If the wing pulls to the right,

turn the left wing sleeve anticlockwise in order to increase the twist, and the right wing sleeve

anticlockwise too, in order to decrease the twist. For a wing pulling to the left, turn the two sleeves in a

clockwise direction. If the correction is insufficient for a perfect wing adjustment, use the tension of the sail

as indicated in the next section.

− Sail tension

Modify the sail tension at the wing tip to counterweight the aging effects upon the sail. To perform this

adjustment, remove the protecting cap from the wing tips and rotate the bolt placed at its end with a 10 mm

wrench. Put the cap back and readjust if necessary the tension of the small ropes of the inner and upper

surface last wing tip batten, because of the modifications of the sail position on the leading edges tubes.

Tense with a maximum of 5 turns (5 mm) and control with a fly-test.

Instruction and Maintenance Handbook FUN 450

Tél. : 33 (0) 4 75 93 66 66 - Fax : 33 (0) 4 75 35 04 03 - Internet : www.aircreation.fr

AIR CREATION Aérodrome de Lanas - 07200 AUBENAS - France

EDITION : MARS 2005

PAGE : 9