How much fuel would be saved if the shuttle ignited from 4km altitude?

Subject: How much fuel would be saved if the shuttle ignited from 4km altitude?

Date: Mon Apr 30 15:15:08 2001
Posted by cris
Grade level: grad (non-science) School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Engineering
ID: 988658108.Eg

Message:


How much of a weight reductuion would be obtained if the primary boosters for a 
rocket were ignited once an altitude of 4000 (or so) metres had been reached?
In other words, if you didnt need rocket propellant to lift the craft (and 
fuel) for those first 4000m.

Re: How much fuel would be saved if the shuttle ignited from 4km altitude?

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