Java
140
Owner`s Manual
Trim speed - The trim speed is adjustable by moving the base of the king post and
thus hang point. Forward movement will speed the glider up, whilst rearward
movement will slow it down. See section on changing hang position (page 19).
A turn in the Java is unusual. If your glider previously flew straight then the most
likely explanation is that you have bent a leading edge. If a turn is detected first
check the battens. Check them against each other (making sure that they are the same
on both sides) and then against the profile. Next check that the batten elastic tension
is the same on both sides of the glider. If there is still a turn check that the leading
edges are straight and undamaged. The only way to be sure is to remove the leading
edges. Refer to your Avian dealer.
A slight turn may be tuned out using the tip adjusters:
The black plastic caps have a small hole drilled as a reference. This reference is lined
up with the self-tapping screw for initial assembly. (This is the datum)
The self-tapping screw should be removed and the black plastic cap turned slightly.
The wing that is lifting should have the washout increased (i.e. trailing edge lifted)
while the wing dropping should have the washout reduced (i.e. trailing edge lowered).
Mark the leading edge with a pen or pencil before removing the self-tapping screw
and
ONLY ALTER THE WASHOUT AT THE TIP IN SMALL INCREMENTS
.
(MAXIMUM 3mm at a time.) The total movement should
NOT
exceed 10mm each
side of the datum (the hole for the self tapping screw.
DON'T FORGET TO
REPLACE THE SELF-TAPPING SCREW.
Other tuning should
NOT
be carried out without reference to Avian Ltd., or an
approved dealer.
BATTENS AND BATTEN PROFILE
The Java battens should be maintained in the correct profile. Failure to do this could
result in adverse flying characteristics.
How often should your battens be checked?
At first check your battens regularly. This will give you some idea of how fast they
are changing profile. The Java has 7075 battens which tend to hold their shape well.
The nose and tip battens are made of a softer 6082 alloy. 6082 battens tend to get
harder, and hold their shape better, once they have been re-profiled a few times. On
the Java the batten most likely to require re-profiling is the nose batten.
Don't forget: If you don't know how the glider has been treated while it is out of your
care (for instance if it has been sent by carrier or on an aeroplane) check the battens
against the profile and do a very thorough pre-flight check
BEFORE
flying.
Checking the profile
The best place to check the profile of your battens is at home on a flat surface. (It is
very difficult to do on the hill with no flat surfaces and the wind blowing the paper
18
