Ringelpiez (aviation)
As Ringelpiez is in the flyer language rotation of the aircraft about the outer end of the airfoil caused by a contact with the ground during takeoff or landing, respectively.
description
Ringelpiez is caused by touching an obstacle or the ground with one of the two wings of the aircraft. Due to the speed at which the aircraft takes off or lands, combined with the long mechanical lever exerted by the braked wing, the aircraft begins to rotate uncontrollably after contact. The axis of rotation is not along the vertical axis of the aircraft because the forward movement hits the unbraked wing faster than the braked one and is thus lifted on one side by lift forces. In the worst case, this can lead to the aircraft overturning.
With the Ringelpiez, mechanical forces act on the entire structure of the aircraft. Depending on the speed with which the wing hits the obstacle, damage can result, up to and including total loss. A typical damage pattern in gliders is a fuselage tube damaged or twisted by torsion behind the wings.
practice
Occasionally, the Ringelpiez is a deliberate maneuver by the pilot. When gliding it happens that due to lack of thermal the pilot makes an outland landing , i. H. a landing outside an airfield . The nature of the selected landing field can force the pilot to deliberately lay down a wing when rolling out in order to avoid a dangerous situation (e.g. rolling over a drainage ditch). Any damage to the aircraft that may arise from the Ringelpiez is accepted in order to avoid personal injury in particular.
In serious accidents with gliders , the Ringelpiez is a proportionately frequent cause of accidents. According to the Federal Bureau of Aircraft Accident Investigation (BFU), a total of 82 “accidents and serious incidents” were reported for gliders and touring motor gliders in Germany in 2008. Ringelpiez occurred in seven of these accidents and two pilots were slightly injured. In all cases the aircraft were badly damaged.
Web links
- Video of a Ringelpiez that got off lightly when a Schleicher K 8 landed
Individual evidence
- ↑ Alexander Willberg : Gliding for Beginners - Theory and Practice . Motorbuch Verlag, Stuttgart 1996, ISBN 3-613-01682-6 , p. 170 .
- ↑ Annual Report 2008: Accidents and serious disruptions in the operation of civil aircraft with the exception of aerial sports equipment. (PDF) (No longer available online.) Federal Aircraft Accident Investigation Bureau , July 22, 2010, formerly in the original ; Retrieved June 8, 2012 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
