Freewind Aviation seems to have been founded about 2013 and gone out of business in 2014.[2] It is not clear how many aircraft were produced, although at least one example flew.[1]
The Bumble B features a single main rotor, a two-seats-in tandem open cockpit with composite fairing and a windshield, tricycle landing gear and a modified four-cylinder, liquid and air-cooled, four stroke, turbocharged 1220NaN0 Rotax 912 engine in pusher configuration.[1]
The aircraft has a two-bladed rotor with a diameter of 8.41NaN1 and a chord of 21.51NaN1. The aircraft has a typical empty weight of 2580NaN0 and a gross weight of 4500NaN0, giving a useful load of 1920NaN0. With full fuel of the payload for the pilot, passenger and baggage is 1380NaN0.[1]
Reviewer Werner Pfaendler described the design as, "a low cost but good quality gyrocopter with excellent flight characteristics".[1]