http://www.airventure.org/news/2012/120724_wasp-wing-ultralight.html

You can take a trip back to the early days of ultralights down on
the farm this week as several early-day ultralights have returned, and one of
the most unique is a Wasp Wing powered hang glider with a modified Rogallo wing.

This Wasp Wing is owned and flown by Keith Sharon, of Sturgeon, Missouri, and
it's always been in his family. Keith's father, Charles Sharon, built the
airframe in 1976 and over the years modified the Rogallo wing several times.
Sharon remembers spending weekends with his father, who often glided in Oregon's
Cape Kiwanda and Seaside areas, as well as Dog Mountain, Washington.

After the family moved to Missouri, he and his brother started experimenting
with putting engines on the glider, starting with a Zenoah G62 model airplane
engine. The machine that Sharon is flying today-and he will be flying it from
the ultralight runway this week-is powered by twin 160-cc ZDZ model airplane
engines that develop 16 hp. He's been flying it with these engines since 2000,
and with 2.5 gallons of fuel on board he can fly for up to 90 minutes and cover
35 to 40 miles. The glider stalls at 18 mph and has a top speed of 35 mph. The
machine weighs 115 pounds empty (less fuel).