|Thambi Mark Levinsson
were you refering to this Goddard?
Robert Hutchins Goddard (1882-1945). A native of Worcester, Massachusetts, Goddard's family was staying at the suburban home of friends in Worcester when, on October 19, 1899, he climbed into an old cherry tree to prune its dead branches. Instead, he began daydreaming
De Laval's Nozzle
A rocket is essentially a heat engine, a device for converting the energy of heat (obtained from the chemical energy of the fuel) into mechanical energy--here the kinetic energy mv2/2 of its exhaust jet. Knowing m and v, Goddard could derive the kinetic energy given to the gas, and by burning a measured amount of the fuel, absorbing the heat (e. g. in water) and measuring the rise in temperature, the total amount of chemical energy converted to heat could also be obtained. The conclusion was rather disappointing: only about 2% of the available energy contributed to the speed of the jet.
Could this be improved? Luckily for Goddard, this problem had been solved by Gustav De Laval, a SWEDISH engineer of French descent. In trying to develop a more efficient steam engine, De Laval designed a turbine whose wheel was turned by jets of steam
Edited By - THILAGAM - 12 Sep 2006 18:35:07 GMT