33
Note:
If you have any problems, giving full down elevator
will release the sailplane. Once it reaches its
maximum launch altitude the sailplane may release
by itself. If not, a quick tap of down elevator will
release it.
These stretch lengths are based on normal wind conditions of
about 5 mph. It may be necessary to increase or decrease the
stretch length depending upon the amount of wind. For example,
if the wind is blowing 10 –15 mph, it will be necessary to
reduce the stretch length slightly. Plan accordingly.
Tow Hook Locations
If your sailplane does not show a location for a tow hook, plac-
ing the hook 1/2” ahead of the center of gravity is a good start.
In general, a forward hook location will provide for the safest
and most stable launch. For more experienced pilots a rearward
location will provide greater launch altitude, however this can
cause veering tendencies.
Maintenance and Storage
Extreme prolonged heat is the rubber tubing’s worst enemy.
Store the SLS in a cool, dry place. Avoid leaving your SLS in
the trunk of the car. During regular use of the SLS in a flying
season you should lightly dust the tubing with talcum or baby
power. This will help the tubing during friction on the ground,
thus increasing its overall life.
Warnings
• Make sure the stake is securely anchored. Check throughout
the day to make sure it has not loosened.
• Do not over-stretch the tubing. Doing so will permanently
damage it to the point of losing its elasticity. As a general
rule, the tubing can be stretched to 300% of its original
length.
• Make periodic checks of all knots. If the tubing or nylon line
becomes frayed, cut that amount off and retie using the knots
shown in the diagram below.
• During the launch make sure there is no one between you and
the SLS stake.
• Do not put the tow hook behind the C.G. of your sailplane.
Doing so will result in a very control sensitive launch, which
could cause a crash.
• Do not use the Unlimited SLS on 2-meter sailplanes. Doing
so could over-stress the wing and could cause it to fold.
Section 14: Hangar 9 G-Force
CONTINUED
Summary of Contents for ULTRA aspire
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