A vehicle that utilizes a liquid-chemical rocket is to be used for escape of a payload of

100,000kg

from the earth. The vehicle is to have two stages, each with

\\\\epsi lon=0.06

and

I_(sp)=400s

, and both having the same structural coefficient

\\\\lambda

. Estimate the total mass of the vehicle. Assume as a first approximation that

gcos\\\\theta t_(b)=2000(m)/(s)

and that drag effects are negligible. To ensure acceptable launch acceleration (say

0.2g_(r)

), what restriction must be placed on the burning period for the first stage?

A vehicle that utilizes a liquid-chemical rocket is to be used for escape of a payload of 100,000kg from the earth. The vehicle is to have two stages, each with =0.06 and Isp=400s, and both having the same structural coefficient . Estimate the total mass of the vehicle. Assume as a first approximation that gcostb=2000m/s and that drag effects are negligible. To ensure acceptable launch acceleration (say 0.2ge ), what restriction must be placed on the burning period for the first stage