The WLtoys F939 is an RTF indoor/outdoor four-channel micro airplane manufactured by Shantou Chenghai Weili Toys Industrial Co., Ltd. of Guangdong, China and primarily distributed via online mail order outlets.
It represents the company's first effort to create and market a fixed-wing model aircraft. The company is perhaps best known for the popular V911 fixed-pitch micro helicopter. Like the V911, the F939 is powered by a single 130mAh 3.7V lithium polymer battery.
It is sold as a complete, ready-to-fly package with a 2.4GHz transmitter, two lithium polymer batteries, a USB-powered charger with two charging ports and a spare propeller.
The F939 is an exceptionally responsive model airplane capable of virtually any aerobatics with the possible exception of 3D flight. Despite the small battery and coreless motor powering the propeller via a gear drive, the F939 is fast for its size with a claimed top speed of 25 MPH (40km/h).
Outdoor flight conditions should be calm given the model's small size and light weight.
- Wingspan: 15.75" (400mm)
- Length: 14.56" (370mm)
- Battery: WLtoys 3.7V 130mAh 15C lithium polymer
- Motor: 8.5mm micro coreless with gear drive
- Minimum operator skill level and age: Intermediate; 14+