A treatise on gyrostatics and rotational motion . or end. we have itBUSpended by crossed chains. Such a bitilar suspension is of courseunstable, as the trapeze tends to turn round towards assuming the arrange-ment of two parallel or uncrossed chains, in which of course the centre of •Tavitv is lower than in tl ther case, and which so far as the bitilar is concerned is the arrangement of stable equilibrium without spin. The gyrostai when without spin and hanging below the trapeze, withthe chains uncrossed, has two freedoms for both of which it is stable: (1) * It is understood here and elsewher
A treatise on gyrostatics and rotational motion . or end. we have itBUSpended by crossed chains. Such a bitilar suspension is of courseunstable, as the trapeze tends to turn round towards assuming the arrange-ment of two parallel or uncrossed chains, in which of course the centre of •Tavitv is lower than in tl ther case, and which so far as the bitilar is concerned is the arrangement of stable equilibrium without spin. The gyrostai when without spin and hanging below the trapeze, withthe chains uncrossed, has two freedoms for both of which it is stable: (1) * It is understood here and elsewhere that there is no friotional resistance involved. Theexistence of Buch resistance must be reckoned with in contrivances for practical exact meaning also of stability cannot be discussed here. 20 GYROSTATICS CHAP. the .system can swing as a pendulum about the swivels at the end of thetrapeze; (2) the trapeze can turn in azimuth about a vertical axis throughits middle point, in vibrations in which the chains are carried in opposite. Motor-gyrostat on crossed bifilar support. ;? z
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