Solid propellents can be useful for certain astronautical operations. The characteristics of these propellents are that they have a high total impulse to total rocket weight ratio, higher reliability, a tendency towards lower costs. The specific impulses are lower than for liquid propellents, about 180 to 200 seconds compared with 240 seconds.
(1954), "The Fifth International Astronautical Congress: Summaries of a Selection of Papers Read at the Congress Held at Innsbruck on August 1–7, prepared by Eric Burgess, F.R.A.S.", Aircraft Engineering and Aerospace Technology, Vol. 26 No. 10, pp. 357-359. https://doi.org/10.1108/eb032483
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