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File:--File-PaperISSS2010V7.doc ...ration by “Roller-Reefing” - a design paper - of a demonstrator solar sail power station spacecraft (SSPS).(7 MB) - 16:35, 20 June 2012File:LGarde20mDemoSail.jpg 20x20m ground demonstration solar sail built by L'Garde for a NASA technology development program.(720 × 469 (64 KB)) - 11:34, 22 August 2012File:Heliogyr.jpg Halley Rendezvous heliogyro solar sail. Spinning sail with long, thin blades. The blades are tilted like those of a helicopter to(640 × 480 (79 KB)) - 14:06, 28 September 2013File:Circular.jpg A circular solar sail. Spin tensions the sail, and panels are periodically shifted to induce control torques. Created 199(640 × 480 (76 KB)) - 14:10, 28 September 2013File:Heliogyro.png Halley Rendezvous heliogyro solar sail. Spinning sail with long, thin blades. The blades are tilted like those of a helicopter to(1,280 × 1,024 (554 KB)) - 17:37, 28 September 2013