Carbon Dioxide Engine
The Carbon Dioxide Engine is one of the first engines available to the Dupes. It stores 100 kg Carbon Dioxide.
Since the Sugar Engine (which is similarly early unlocked) needs a resource that requires extensive preparation (and has other uses than being used as fuel), the Carbon Dioxide Engine is a more economical option. However, it has significant limitations.
Limitations
Carbon Dioxide Engines cannot use additional fuel tanks, and the range is limited by the total amount of fuel that can be stored in the engine module itself. This gives the CO2 engine rocket a maximum range of 6 tiles. The maximum rocket height that the engine can support is just 10 tiles too; adding cargo modules is not a likely option.
Alone among the engines, this Engine does not produce electricity.
Easy Fueling
Fortunately, fueling the Engine is very easy. Indeed, upon landing, it is possible to collect the accumulated Carbon Dioxide from the breathing of the crew and channel it into the Engine; a Gas Filter might be needed to avoid mishaps.
Considering its limitations and advantages, the Engine is best for orbital research, or for travelling between the starting planetoid and its nearest neighbour.
Landing
When launching or landing, a rocket using a Carbon Dioxide Engine will create a CO2 exhaust cloud, with a temperature of around 200°C, regardless of the temperature of the CO2 stored in the engine. This will scald dupes if it doesn't dissipate into exposed space, though this temperature is still much more manageable than the exhaust of more powerful engines.
Trivia
The engine resembles soda bottles that have been taped together.
| Engines |  Carbon Dioxide Engine Sugar Engine Steam Engine Small Petroleum Engine Petroleum Engine Radbolt Engine Hydrogen Engine |
|---|---|
| Fuel tanks and Oxidizers |  Large Liquid Fuel Tank Small Solid Oxidizer Tank Large Solid Oxidizer Tank Liquid Oxidizer Tank |
| Cargo Modules |  Cargo Bay Large Cargo Bay Liquid Cargo Tank Large Liquid Cargo Tank Gas Cargo Canister Large Gas Cargo Canister Critter Cargo Bay |
| Utility Modules |  Orbital Cargo Module Rover Module Trailblazer Module Cartographic Module Battery Module Solar Panel Module Artifact Transport Module |
| Command Modules and Nosecones |  Solo Spacefarer Nosecone Spacefarer Module Basic Nosecone Drillcone |
