Increased demand from Asia for combustion engines for unmanned helicopters

German engine manufacturer 3W-International GmbH saw increased demand for heavy fuel (HF) and gasoline combustion engines in 2016. Interest is increasing especially strongly for their use in unmanned helicopters. The reasons for this are manifold. 3W motors have been known for their use in vertical take-off aircraft since before the T-Hawk MAV unit from Honeywell. ["]