ToughSF on Twitter: "A liquid fuel ramrocket can reach Isp double that of even the best hydrolox propellants. It is very effective when used to accelerate a spaceplane through the atmosphere. However,
![ToughSF on Twitter: "A liquid fuel ramrocket can reach Isp double that of even the best hydrolox propellants. It is very effective when used to accelerate a spaceplane through the atmosphere. However, ToughSF on Twitter: "A liquid fuel ramrocket can reach Isp double that of even the best hydrolox propellants. It is very effective when used to accelerate a spaceplane through the atmosphere. However,](https://pbs.twimg.com/media/DlZlJWbX4AAUn5k.jpg:large)
ToughSF on Twitter: "A liquid fuel ramrocket can reach Isp double that of even the best hydrolox propellants. It is very effective when used to accelerate a spaceplane through the atmosphere. However,
![Cheaper space launch $500/kg or less: Ram accelerator, magnetic launch and plasma hypersonic | NextBigFuture.com Cheaper space launch $500/kg or less: Ram accelerator, magnetic launch and plasma hypersonic | NextBigFuture.com](http://farm2.static.flickr.com/1240/1046415757_f7e4174845_o.jpg)
Cheaper space launch $500/kg or less: Ram accelerator, magnetic launch and plasma hypersonic | NextBigFuture.com
Analysis of rocket, ram-jet, and turbojet engines for supersonic propulsion of long-range missiles 1: rocket-engine performance - UNT Digital Library
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