Switchblade Progress Report, March 6, 2010

These drawings show the improvement of the ducted fan design achieved through our work at DAR Corp in Lawrence, Kansas. The sections are the before and after flows, and show the improvement in the ducted fan flow just ahead of the propeller. The images are from a CFD program (computational fluid dynamics), which acts like a wind tunnel in the computer. With this and the calculation methods available, we have good certainty of being within 5% of actual. Test flight will get us the rest of that certainty, and we are looking forward to that. Next up will be views of the front end/steering.

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