The men are identified as pilot David D. Spencer, 78, and his passenger Rafael J. Chaves, 71. They were transported separately by helicopter to a hospital in Neenah, Wis., according to the Fond du Lac Reporter.
Witnesses said the plane — a two-seat fixed-wing CTLS model aircraft manufactured by Flight Design — appeared to have a mechanical problem shortly after taking off and was trying to return for a landing about 8:20 a.m. Thursday. It banked abruptly and crashed in an open field several hundred yards from the runway.
I didn't know there was another CTLS at KSAF beyond Bonnie's N505MA. AIN says this is N527TS.