X-51A Waverider By César Tomé September 8, 2013 0 comments Print The X-51A Waverider is set to demonstrate hypersonic flight. Powered by a Pratt Whitney Rocketdyne SJY61 scramjet engine, it is designed to ride on its own shockwavem and accelerate to about Mach 6. (U.S. Air Force graphic) Leave a ReplyCancel replyYour email address will not be published.Required fields are marked *Comment *Name *E-mail *WebsiteΔ