Whilst all the base rocket parts like fuel storage, engines and command capsule are all relatively light. So despite having the same base achievable distance, the net distance after weight penalty is 10,000km more for the hydrogen example. Hydrogen rocket: 4600kg (fuel 1800kg, oxidizer 1800kg, engine 500kg, capsule 200kg, fuel/oxy storage 300kg) Weight pentalty: -6,200km(ish).Petroleum rocket: 6200kg (fuel 2700kg, oxidizer 2700, engine 200kg, capsule 200kg, fuel/oxy storage 400kg) Weight pentalty: -16,177km.This is significant since the mass of these two rockets would be totally different: This distance would be boosted to 143,640 km if you use liquid oxygen instead of oxylite as the oxydizer.
#OXYGEN NOT INCLUDED PETROLEUM FULL#
This is the same distance provided by only 2 full tanks of hydrogen (60km/kg * 1800kg). Seeing the difference between petroleum and liquid hydrogen we can see that 3 tanks of petroleum will provide a base distance (before weight penalty) of 108,000km. So either you build a ship with 3 fuel tanks per oxidizer tank, or measure/limit the amount of oxidizer you pump in on smaller ships. Interestingly, the oxidizer storage carriers exactly enough to burn 3 full fuel storage containers of fuel. Solid oxydizer tank, weight 100kg, can carry 2700kg of oxydizer.Liquid oxydizer tank, weight 100kg, can carry 2700kg of oxydizer.Liquid fuel storage, weight 100kg, can carry 900kg of fuel.Oxylite has a burn efficiency of 100%, Liquid oxygen has an efficiency of 133%, this would give for example Petroleum the power of 40km/kg and 53.2km/kg respectively. Importantly, engines (except steam) require an oxidizer now in a 1-to-1 ratio with the fuel in order to burn. This is a nice mechanic that prevent mega rockets ever making sense as the additional weight costs too much distance. The key take away is that every kg you add to your ship costs more than the last in terms of achievable distance. The efficiency of a fuel is important since its a linear relationship between kg of fuel used and distance traveled, however the weight penalty is non-linear (credit to neoazureus): Pentality = Max There are three fuels for each of the three base engines, each has its own "efficiency" in terms of km achieved per kg used: Please post issues or suggestions below in the discussion.
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