I have seen the Sportsman flier before, the chassis was used to win a Bonneville Land speed record in the 175cc push rod engine class.
http://sportsmanflyer.blogspot.co.uk/
A class I am going to compete in myself next year. I spent last winter building my own 175cc push rod engine, which is finished and awaiting a little work on my chassis before it goes on the dyno!.
I never posted on here about it as it is an ICE machine. Interesting project though, having to design and manufacture my own cam aswell as extensive hardware mods to the rest of the lump.