The Whisper Aircraft Whisper motor glider is a South African two-seat kit aircraft that was designed by Russell Phillips in 2004 and is produced by Whisper Aircraft of Port Elizabeth.

Major assemblies are completed at the factory with assembly intended to be completed by the owner.

It is powered by a four-cylinder Limbach L2000 aero engine with options for the 85 hp (63 kW) Jabiru 2200 and 80 hp (60 kW) Rotax 912 available.

[1][2] The design was developed into the Whisper X350 Generation II kit aircraft in 2015.

[1] Data from Whisper Aircraft[3]General characteristics Performance