Below are links describing NASA's ERAST project, a high-altitude,
remotely piloted vehicle (RPV) powered by a 914 with a triple
turbocharger.
Besides the interesting technical details, it's noteworthy that NASA
(most $$ and technical expertise of anywhere in the world) chose the
Rotax 914 for its reliability and efficiency. The U.S. Air Force uses
the 914 also in its RPV also.
http://www.dfrc.nasa.gov/PAO/PAIS/HTML/FS-059-DFRC.html
http://www.manufacturing.net/magazine/dn/archives/1996/dn0909.96/feature2
.htm
Regards,
Fred F., A063
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