National Geographic : 1950 Jun
822 plans Groenhoff A Sailplane Pilot Sets Out to Ride a Turbulent, Drafty Elevator into the Sky A few glider men venturing into true thunderheads have been driven upward a mile a minute and tossed like feathers. This cumulus congestus cloud promises updrafts but no lightning. The plane, Screamin' Wiener, takes a tow near Elmira, New York. In Texas it set an international goal-and-return record of 229 miles.