Dec 28, 16 / Cap 27, 00 16:31 UTC
Re: Solid rocket propellant ¶
Calculate with the help of potential energy. The potential energy of satellite at surface of planet is calculated as E1 = GMm / R, the potential energy of the satellite at the height H is E2 = GMm / (R+H). Difference E1 - E2 gives the quantity of energy that we need for ideal case 100% effectivity. In real case, the effectivity of solid propellant is less than 1%. You can use magnitude 0.5%. Consequently, the Expand of energy will be equaled to (E1 - E2) / 0.005. Mass of propellant is (E1 - E2) / 0.005 / Q, where Q is the heat of combustion of propellant.