a portal to space : 無料・フリー素材/写真
a portal to space / jurvetson
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Ho ho ho from the Future Ventures office. The Xmas decorations are by Melissa Ho.Sitting on the left is a silver Mercury suit. On the right is a vintage RL-10 rocket engine. Designed in 1959, they still fly today, and a pair of these engines were the upper stage of the recent Boeing Starliner launch. Back in 60's, Werner Von Braun told Dick Mulready, the first project engineer for the RL10, “It was our trip to Florida to see the RL10 firing that gave me confidence to use hydrogen for Apollo.” The bell on the right is actually composed of 360 pipes that route the super-chilled hydrogen fuel down and back before combustion to keep the nozzle from melting (regenerative cooling). They are brazed together with pure silver on a bell-shaped mandrel.This engine uses a clever expander cycle with gear-coupled fuel and oxidizer turbo pumps, a design that has not been used on any other hydrogen engine. The phase change of the hydrogen fuel powers both the fuel and oxidizer cyro pumps.A Pratt & Whitney employee claimed that this unit was the second one built. It may be the only original RL10 in private circulation. Original arrival video |
| 撮影日 | 2019-12-25 12:57:45 |
| 撮影者 | jurvetson , Los Altos, USA |
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