The Nelson Aircraft Corporation was founded in 1945 by sailplane pilot Ted Nelson and sailplane designer William Hawley Bowlus in San Fernando, California.

Bowlus and Nelson formed the Nelson Aircraft Corporation to build a two-seat, motor glider version of the popular Bowlus BA-100 Baby Albatross. The designers nicknamed this design the Bumblebee but they sold the powered glider under the official moniker, Dragonfly.  The design was further refined with the help of Harry Perl and Don Mitchell and redesiginated as the Hummingbird.

Summary of aircraft built by Nelson Aircraft
Model name First flight Number built Type
Nelson Bumblebee 1946 1 Motor glider
Nelson Dragonfly 1947 7 Motor glider
Nelson Hummingbird 1953 7 Motor glider

Source: Wikipedia