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- W2896633828 abstract "Starting from the observation that a flying saucer is a nonholonomic mechanical system whose 5-dimensional configuration space is a contact manifold, we show how to enrich this space with a number of geometric structures by imposing further nonlinear restrictions on the saucer's velocity. These restrictions define certain `manoeuvres' of the saucer, which we call `attacking,' `landing,' or `G2 mode' manoeuvres, and which equip its configuration space with three kinds of flat parabolic geometry in five dimensions. The attacking manoeuvre corresponds to the flat Legendrean contact structure, the landing manoeuvre corresponds to the flat hypersurface type CR structure with Levi form of signature (1,1), and the most complicated G2 manoeuvre corresponds to the contact Engel structure with split real form of the exceptional Lie group G2 as its symmetries. A celebrated double fibration relating the two nonequivalent flat 5-dimensional parabolic G2 geometries is used to construct a `G2 joystick,' consisting of two balls of radii in ratio 1:3 that transforms the difficult G2 manoeuvre into the pilot's action of rolling one of joystick's balls on the other without slipping nor twisting." @default.
- W2896633828 created "2018-10-26" @default.
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- W2896633828 date "2018-10-11" @default.
- W2896633828 modified "2023-09-27" @default.
- W2896633828 title "Aerobatics of flying saucers" @default.
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- W2896633828 hasPublicationYear "2018" @default.
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