Generally, a parachute composes of thin light- weight fabric,
supporting tapes and suspension lines. Nylon, polyester, Kevlar and Nomex fiber
types can be used in producing fabric for parachute. The tethers connecting the
parachute to back shell are made of Kevlar.
Significant physical properties are demonstrated by the
fibers including Kevlar, Nomex types fibers. An example is the strength of
Kevlar fibers which is five times greater than steel on an equal weight basis.
The toughness and high rigidity are useful to produce engineered textiles where
resistance to cut and shock is desired.
Flexibility and weathering resistance of fibers provide interesting
features to achieve in aerospace operations. The forces acting upon the
parachute following its full expansion are addressed in developing the design
of parachute. Typically, these forces can be calculated from the atmospheric
density, velocity, parachute drag area and mass (12).
Anti- gravity suits, space suits and parachutes are the few
examples effectively serving the aerospace operations. However, there are
several others and more could be innovated. Some other examples include the
textile articles used as the constituent part of aircrafts, and are known to
significantly add in the style, design and construction (13). Traditionally,
such components include curtains, upholstery fabrics, wall cover, headrest,
sheepskins etc. The items can be tailored for the design and comfort, and for
added protection requirements these can be rendered flame retardant.
Today, the textile fibers are significantly recognized for
the performance required in specialized applications. The field of technical
textiles has gained significant interest in some developing countries. The
growers of natural fibers are now looking for developing work in high-
performance textiles to serve the places including air craft, space shuttle,
health care, automotives, geo construction, transportation and physical
protection.
It would undoubtedly be a factual approach to appreciate the
significance of an enhanced value addition to produce textiles with an
increased return for industrial development in general and for the betterment
of country at large.
References
- Anon., Markets for technical textiles, Business
Coordination House, Home page, www.bch.in
, accessed June 24, 2008
- Seshadri Ramkumar; Appachi Arunachalam, India rising: Opportunities in nonwovens and technical textiles, Texas technical university, Texas
(USA), pp1- 2.
- Reena Mital, Technical textile net, Home page, www.technical-textiles.net
, accessed July 3, 2008.
- Ed., Faheem Uddin, BE textile design project, NED university of engineering and technology, 2005.
- Anon., G- suit, Home page, http://en.wikipedia.org
, accessed June 26, 2008.
- Anon., Antigravity suit, The internet encyclopedia of
science, Home page, www.daviddarling.info
, accessed June 26, 2008.
- Anon., Airmanss world, Home page, www.af.mil , accessed June
26, 2008.
- Anon., Space suits, ILC Dover, Home page, www.ilcdover.com .
- D. Graziosi; J.Ferl; K. Splawn, Evaluation of rear
entry system for an advanced spacesuit, SAE International (2005), pp 1- 2.
- D. Graziosi; W. Keith Splawn; Jinny Ferl; Amy J. Ross,
Evaluation of the rear entry I- suit during desert RATS testing, ILC
Dover, LP and NASA- Johnson Space Center, (2006), pp 1- 2.
- Anon., Parachute- Wikipedia, Home page, http://en.wikipedia.org
, accessed July 2, 2008.
- Anon., Jet propulsion laboratory, Mars exploration
rover mission, Home page, http://marsrovers.jpl.nasa.gov , accessed July 2,
2008.
- 18. W.P. Shepard son, Problems of parachute design and
their relation to textiles, WADC, pp 3- 4.
- Anon., Lantal textiles, Home page www.aerospace-technology.com.
About the Author:
The author
is associated with the Textile Department, School of Science of Technology, University of Management and Technology, Pakistan.
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