http://en.wikipedia.org/wiki/Parachute
http://en.wikipedia.org/wiki/List_of_talle...vue,_Washington
http://www.hsl.org.au/articles/parachutes.pdf
http://www.nakka-rocketry.net/paracon.html

What are the different materials used for manufacturing Parachute ?.

People who would like to use Parachute can jump from the sky from maximum what height/altitude ?.

Are there any chances of Parachute being not able to open while diving from the sky ?.

Are there any possibilities of Parachute being teared while diving from the sky ?.

Parachute structure is parabolic in shape, can any other shapes also be tried for designing Parachutes ?. viz square, triangle, rectangle etc ?.

Can a Parachute be useful to Construction Building Laborers who are working on Sky-Scrapers say 450 Feet ?.

At what Height from Ground Base Level the Person having a Parachute will be able to land safely on the Ground ?. i.e. Below this Height, the Person will not be able to land safely on the Ground with the help of Parachute.

For examples : Person Jumping from 100, 200, 300, 400, 500, 1000, 2000, 5000, 10000, 50000 etc Feet Altitude ?.

Is it possible to find out the Height / Altitude from Ground Base Level using Robot (will pull the cord), Dolls, Toys etc ?.

Can Pulling the Cord (Manual process) by the Sky Diver converted to a automated process ?

Thanks & Regards,
Prashant S Akerkar