DG Flugzeugbau LS4 - Assembly of the Wing Water Ballast Bags

Maintenance Manual LS4
Issued: May 2011
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
4-13
4.5.2 Assembly of the wing water ballast bags
- Pull a piece of bicycle type tube over valve end, 60 mm <2.4 in> long.
Dump valve version 1:
- Adjust ballast bag with seam to leading edge and to valve with the pattern.
- If there are brass eyes along one side of the bag this side must be at the
spar and the lower rope must be pulled through the eyes.
Dump valve version 2:
- Adjust ballast bag with seam to leading edge and to valve as shown below.
Both versions:
- Different valve direction may extend discharge time considerably.
- Push bag on valve stub, cover bag on stub with tape (example Tesaflex
4163) to protect bag against damage from hose clamps. Turn both seams
during taping in the same circumferential direction, otherwise the
discharge time will increase.
- Tighten hose clamps and check for watertightness before installation into
wing.
- Connect braided nylon rope to brass eye at bag end by special knot
("Pahlsteek") as shown below.
Dump valve version 2:
- Fix free rope end with tape.
Both versions:
- Connect rope to intermediate rope in wing (if no longer connected) by
stitching.
- Check for presence of bonded-on gasket at valve discharge port.