Polymorf - Knowhere - Hyperboloid cylinders

Flexing it in the other direction results in the wider diameter hyperboloid shown below.

	Fig. 285 - Hyperboloid cylinder
	(built with all LT or ST)
	◄ flexed outwards
	unit cell ►
	dotted line indicates removed strut
	click image to enlarge

Likewise, variations of the Tri-1 spaceframe whose unit cells were shown in Fig. 234 a) and

d) previously, can be destabilized in a similar fashion to create hyperboloids.


click image to enlarge
a) side view	b) top view	c) unit cell
(demonstration model)		dotted line indicates removed strut
Fig. 286 - Hyperboloid cylinder (built with all IT)

click image to enlarge

a) side view

b) unit cell

Fig. 288 - Cooling tower

Fig. 287 - Hyperboloid cylinder (built with all RT)

The hyperboloid cylinder design is commonly used for cooling towers. The narrowed

midsection of the tower creates a Venturi effect of low pressure that draws air into the

base. There the air mixes with waste steam that cools as it rises to the top.

If the Tri-1 spaceframe is further destabilized by removing another strut from
its unit cell, the hyperboloid cylinder built from it can turn itself inside/out.
That is, the inside of the cylinder becomes the outside and vice versa. In the
process it is transformed into a flat disc whose center rises up to form the
walls of the cylinder before collapsing back into the disc shape again.

Fig. 289 - Tri-1 unit cell with two struts removed (dotted lines) ►

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