Question

Assume you have a rocket that requires a change in velocity of DeltaV=9.6km/s . There are two options for the propulsion system --- 1. chemical and 2. electric --- each with a different specific impulse.

Using the setting of g0 =9.81m/s^2 to calculate the propellant fraction required to achieve the necessary DeltaV for each of propulsion system answer the following two questons.

Question 1

First, consider a cryogenic chemical propulsion system with Isp Isp=450s . Enter the required propellant fraction as a proportion with at least 2 decimal places


Question 2

Next, consider an electric propulsion system with Isp Isp2000s . Enter the required propellant fraction as a proportion with at least 2 decimal places

Answer 1

0.82