9
Check the cables at the control bar corners, making sure there are no kinks or twisted thimbles. Check for proper
installation of all nuts and safety rings at the control bar corners.
Unzip the center zipper.
Check the sweep wire for wear where it passes around the
kingpost channel (
Photo 21
).
Check that the routing of all VG ropes and pulleys is clear and
straight (
Photo 21
).
Check the VG operation - the pull should be light initially,
becoming harder as the VG tight limit is reached. The return on
release should be smooth.
With the VG set tight, the sprog paddle slides forward on the
transverse batten. Make sure that at VG full tight the rear end of the
paddle does not slide past the rear edge of the transverse batten, or
the system could
malfunction.
Photo 21
Check the crossbar center plate’s assembly including the sweep wire/X-bar junction and the center bolt.
Also, visually inspect the crossbars by sighting along the length of the crossbars looking for any evidence of damage.
Check the control bar apex bracket hardware, including the clevis pin safeties, the control bar top plug bolt and nut, and the
kingpost bracket bolt and nut.
Check the main and backup hangloops, bolt and nut, that they are properly installed in the proper position and that they are
in good condition (
Photo 21
).
LAYING THE GLIDER DOWN FLAT
Once you have the glider set up, it can be laid down flat on the ground.
1. Remove the nose cone from the nose.
2. Release the bottom front wires from the nose hook.
3. Lay the glider down with nose into the wind.
4. Take a keel tube with a hand near the trailing edge and put the keel tube approx. 0.5 m up. Release the sweep wire
from the hook on the keel tube to loose a tension of bottom side wires.
Reverse the procedure to set the glider upright again.
LAUNCHING AND FLYING THE DISCUS
Before launching, hook in to the glider and do a careful hang check. We recommend that you hang as close to the basebar
as possible - this will give you lighter control pressures and better control in both roll and pitch.
1. If the wind is more than 25 km/h (15 mph) or gusty you should have an assistant on your nose wires on launch, and, if
necessary, an assistant on one or both side wires. Make sure all signals are clearly understood. Do a hang check
immediately prior to launch. The angle at which you hold the glider should depend on the wind speed and slope of the terrain
at launch; you want to achieve a slight positive angle of attack at the start of your run.
2. Run aggressively on launch and ease the bar out for lift off.
3. The flying characteristics of the Discus are typical of a medium performance flex wing. Make your first flights from a
familiar site in mellow conditions to give you time to become accustomed to the glider.
4. We recommend that you take-off with VG off.
5. Do not take off if the sail is wet, especially the leading edge, as the stall speed will increase significantly.
Always fly with a
dry sail!
6. For the same reason take special care to avoid ice-covering the glider, particularly the leading edge in wintertime.
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