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Roladen-Schneider LS-4a Sailplane

CSA LS-4a ready for a day of soaringThe "4" or "Three Whiskey" as it is also known, is CSA's only single seat sailplane. It is a fairly high performance sailplane and is a joy to fly both locally and cross-country. Three Whiskey is CSA's primary cross-country sailplane and many members fly it in pursuit of SSA badges. The LS-4a is a very docile, and comfortable sailplne to fly for long periods and many members have achieved their 5-hour Silver badge duration flight in this sailplane. LS-4s are widely used in European clubs because of it's flight characteristics and comfortable cockpit which make it suitable for even lower-time club members.


CSA LS-4a Information
CSA Crew Chief: Merl Raisbeck
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Registration: N30SZ
Contest ID: 3W
Serial No.: 4473
Documentation: CSA LS-4a Uesr Guide
  Flight Manual
  Maintenance Manual
  EDS Oxygen Delivery Manual
  Dittel Radio
  Zander SR940 Manual
  Zander SR940 Manual Update
  Zander GP940 Flight Recorder Manual
  Zander PC Software


The following data is from and represents optimum, ex. factory specifications. For actual, current weights, etc. for N30SZ see the CSA Sailplane Data page.

General Details
Manufacturer: Roladen-Schneider
Country Of Origin: Germany
Designer: Wolf Lemke
No. of Seats: 1
No. Built: ~600
Aspect ratio: 21.4
Airfoil: Wortman Mod
Structure: GFRP foam sandwich
L/D Max: 40.2 @ 102 kph / 55 kt / 63 mph
MinSink: 0.60 m/s / 1.97 fps / 1.17 kt
Span Area Empty Weight Payload Gross Weight Wing Load Water Ballast
m ft sq.m sq.ft kg lb. kg lb. kg lb. kg
kg lb.
15 49.2 10.5 113 238 525 234 515 472 1040 44.9 9.21 140 308