Hi, The GFA Glider Handicaps 2007/8 - Multiclass document lists the LS4 a/b's reference weight at 525 kg.
If I look into the LS 4 flight manual (this is the Geelong Gliding Club's LS4a VH-UKA: http://www.gliding-in-melbourne.org/new/files/fmanuals/LS4a.pdf ), it states its empty weight at 241 kg; on the page 14, there is a Water Ballast Limitations table. For a glider with the empty weight of 240kg and the Pilot and Parachute weight of say 100kg, the allowable water ballasts is 132 kg: 241kg + 100kg + 132kg = 473kg. This is 57kg short of the published reference weight. The max water ballast for the LS4 is 140 l (manual, page 30), so if the manual is right, it is physically and legally impossible to take this glider to its published reference weight. Clearly there is something wrong here, either the reference weight is to high or the LS 4 manual is incorrect. Does anyone have any idea? Thanks Jarek
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