Liebherr Uses Steinmeyer Ballscrew In Sukhoi Jet Liebherr-Aerospace has specified a Steinmeyer ballscrew for the horizontal stabiliser trim actuator of the Sukhoi Superjet 100, which will be introduced at the Paris Air Show in June. Liebherr-Aerospace, from Lindenberg, Germany, is responsible for the fly-by-wire flight control system of the Sukhoi Superjet 100. The jet, produced by Russian aerospace firm Sukhoi Civil Aircraft Company, will contain between 75 and 95 seats. An aeroplane must be in balance longitudinally to fly. This means that the net effect of all the forces acting on the aeroplane must not produce an overall pitching moment about the centre of gravity. Without a horizontal stabiliser there would be only one combination of speed and centre-of-gravity position where this requirement was met. The horizontal stabiliser provides a balancing force to maintain equilibrium for different speeds and centre-of-gravity positions. The ballscrew is part of an actuator that mov...
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