GDMMBi²13-1G
Version 0010
23
5.2.3
Sail Reinstallation
1. Preparation for Fitting the Sail
At this stage a workspace large enough to open the wings fully is required.
Place the airframe crossbar uppermost on a pair of trestles, one at the nose, the other at the
crossbar ends.
Insert the two outer leading edges. These have a notch to engage on the bolt within the inner
leading edge, and should be positioned with the mount for the tip-rods innermost (rearwards).
The outer leading edges are not defined for right/left.
Using clean rags, bubble pack or similar padding at the end of the keel, the hang-bracket, and
the ends of the leading edges to protect the sail, Figure 5-9.
Hang a weight on the nose, Figure 5-10, approximately enough to balance the weight of the
sail when laid half-way between the rear trestle and the end of the leading edge,
approximately 5kg.
Pull the leading edges together, still with the crossbar on top.
Figure 5-9
Figure 5-10
2. Fitting the Sail to the Airframe
Lay out the sail in a straight line back from the end of the leading edges, with the nose
towards the structure.
The upper wing surface should be uppermost at the nose, folding over to show the
undersurface further down the wing, aiming to achieve a straight run for the tubes down the
leading edges of the sail.
The sail has an inner bridge between the top and bottom surfaces located inboard of the
leading-edge/crossbar junctions.
Figure 5-13 taken inside the wing from the leading-edge/crossbar junctions shows the
membrane from the top to bottom surfaces, behind the crossbar.
The leading-edges and the crossbar must pass in front of the membrane during sail fitting.
Taking care not to catch the sail on anything as you pull it over the structure, pass the nose
opening of the sail over the two leading edges and slide it up to the crossbar
and slide it to the
level of the cross bars,
observing the need to pass all tubes in front of the internal bridge.
Figure 5-11 and Figure 5-12.
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