(Source:http://www.google.co.in/search?hl=en&q=Bellow+in+automobile+design&bav=on.2,or.r_gc.r
_pw.r_qf.&biw=1341&bih=581&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=4Q9CUPr
mOYjPrQfc1ICQDQ#um=1&hl=en&tbm=isch&sa=1&q=How+car+roof+opens&oq=How+car+roof+
opens&gs_l=img.12...100.54915.17.56022.8.8.0.0.0.0.0.0..0.0...0.0...1c.y5qM3rpAM14&pbx=1&
bav=on.2,or.r_gc.r_pw.r_qf.&fp=645c62c67378eda0&biw=1341&bih=581 ; Sept.1, 2012)

The bellow-design helps to expand and contract. The bellow mechanism helps to remain flexible. The overhead roof-top uses bellow technique of the opening of the roof. The flexibility of the technique helps to expand and contract for opening or closing the roof-top. The bellow-joints (plate 9B&C) of bus help to negotiate while turning. The negotiation becomes much easier in smaller streets. The expansion and contraction of the bellow mechanism is widely used in places where it has to turn in various angles with one end remains stationery and other end negotiating.  Hence, bellow paradigm has helped to solve lot of design problem on the basis of expansion and contraction.

Plate 10A Seated Hawk	10C Gliding Eagle	10D Attacking Eagle

(Source:http://www.google.co.in/search?hl=en&q=Bellow+in+automobile+design&bav=on.2,or.r_gc
.r_pw.r_qf.&biw=1341&bih=581&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=4Q9CU
PrmOYjPrQfc1ICQDQ#um=1&hl=en&tbm=isch&sa=1&q=Eagle+&oq=Eagle+&gs_l=img.12...76.87
64.24.10934.7.7.0.0.0.0.0.0..0.0...0.0...1c.NZGZ3C1qPSw&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=
645c62c67378eda0&biw=1341&bih=581 ; Sept.1, 2012)

The contraction of the wings of Eagle helps them to conserve body heat (plate 10A). Eagle uses the expansion of the wing for gliding for hours (plate 10C). The expanded wing holds the air under its wing for smooth floating while the expansion of the tail feather helps them for negotiating various directions (radar). The attacking Eagle (plate 10D) applies the expanded position of the wing in an angle for the sharp fall towards the prey. In each position it applies expansion and contraction paradigm for various manoeuvring.