A New Twist on Retractable Motors

Dean Sigler Batteries, Electric Aircraft Components, Electric Powerplants, Sustainable Aviation 0 Comments

GP Sailplanes in Poland recently partnered with MGM Compro of the Czech Republic to add electric power to its line of small, sleek sailplanes.  Concentrating initially on the 13.5 meter racing class (44.29 feet), GP’s craft provide high performance with light weight and compact dimensions. A Long Reach on the Antares Putting a retractable motor and folding propeller into such a tight space required some clever engineering.  Think of the tall mast on the Lange Antares or the Arcus two-seater.  These are large, heavier machines, so the propeller, mast and motor can be accommodated (tightly) in their fuselage.  The video gives a good view of just how close the quarters are on the Antares at about the 3:14 mark.  With …

EAS VIII: Across the Atlantic – Twice

Dean Sigler Electric Powerplants, Sustainable Aviation 0 Comments

Jean-Luc Soullier, holder of Fédération Aéronautique Internationale records for speed and altitude in an aircraft almost lighter than its pilot, has a greater series of ambitions to expand the range and speed of electric aircraft. Having stretched the limits of his Colomban MC-30e with two different motors, he’s looking at a longer-spanned, cleaner aircraft – the Windward Performance Duckhawk – as a means of getting higher speed and much longer range for a truly formidable (tres formidable) crossing of the Atlantic Ocean, not once, but twice. The airplane, with a Rotex motor on the nose and a specially-designed Arplast three-bladed propeller, will weigh a mere 105 kilograms (231 pounds) empty – without batteries. This is considerably less than the lightest …