The US Aviation Cumulus is an American low-wing, single-seat, open cockpit motor glider that was designed by Dave Ekstrom and produced by US Aviation, supplied in kit form for amateur construction.
The US Aviation Cumulus is an American low-wing, single-seat, open cockpit motor glider that was designed by Dave Ekstrom and produced by US Aviation, supplied in kit form for amateur construction. (en)
The US Aviation Cumulus is an American low-wing, single-seat, open cockpit motor glider that was designed by Dave Ekstrom and produced by US Aviation, supplied in kit form for amateur construction. (en)