The Difference Between Liquid Fuels and Solid Fuels

Liquid fuels have a much higher specific impulse as compared to solid fuels. Liquid fuels are engines that use liquid fuels are much more efficient. The other thing about liquid fuels is that if you have a rocket that uses liquid fuels, you can shut it down and restart it. It's because we need to store these missiles for a long period of time,. maybe for years in canisters and all that.