Like me, You may have missed Rogallo's obit late last year.
He died near the first flight site in North Carolina.
How appropriate!
He gave his Rogallo patents to the Country at the time of Sputnik.

His design gave birth to hang-gliding, ultra lights, powered parachutes,
Light Sport Aircraft and a new birth of enthusiasm for flying (just) in
reach of the average person.

Francis Rogallo - 2009

Brian W