The EFF Prometheus was an unusual two seat motor glider powered by a pair of small turbojet engines, designed and constructed in Switzerland in the 1970s.
[1] The later Prometheus 19 of 1978 was a two-seat, side-by-side configuration aircraft with a new fuselage, purpose built to contain the wider cockpit and the twin turbojets, a new, mid-mounted wing with a different section and a span, in its initial form, of 19.4 m (63 ft 7.8 in).
It was fitted with flaperons for lateral control and lift generation, combined with DFS-type airbrakes operating only from the upper wing surface.
Two 0.88 kN (197.8 lbf) Microturbo TRS 18 engines were mounted behind the cockpit, fed from a pair of dorsal intakes immediately aft of the glazing and exhausting over the rear fuselage a little behind the wing trailing edge.
The Prometheus had a tall, straight edged fin with the narrow chord tailplane and single elevator on top in T-configuration.