The Japanese space agency, JAXA, is actually testing the idea, using special heat-resistant paper, another of Toda's plane designs, and a Mach 7 wind tunnel.

日本的宇宙航空研究开发机构(JAXA)正在实验这一想法。该机构利用特制的耐高温纸，采用户田拓夫另一个飞机设计，在一处7马赫的风洞进行测试。

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There were new designs for the plane's rocket engine, landing equipment and the small rockets needed to move it in space.

VOA: special.2010.07.07

Zodiac Aerospace tests plumbing designs before plane builders install them on commercial jetliners.

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The construction of the plane has been plagued by problems - it is seven years behind schedule and has required numerous re-designs because of delays in software delivery and bulkhead cracks.

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