scifi:spacecraft
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scifi:spacecraft [2019/12/22 13:43] – sam | scifi:spacecraft [2020/04/26 10:27] (current) – sam | ||
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===== Definitions ===== | ===== Definitions ===== | ||
- | **Mass**: Total size of the vehicle, in // | + | **Displacement**: Total size of the vehicle, in // |
+ | |||
+ | **Mass**: The actual mass of the vehicle in metric tonnes. This can get complicated, | ||
**Thrust**: How powerful a drive is, per displacement tonne. The higher this is, the faster a spacecraft can accelerate. This is based on Newtons of force produced by the drive, multiplied by a magic number. | **Thrust**: How powerful a drive is, per displacement tonne. The higher this is, the faster a spacecraft can accelerate. This is based on Newtons of force produced by the drive, multiplied by a magic number. | ||
**Impulse**: | **Impulse**: | ||
+ | |||
+ | **Delta-vee**: | ||
The **Total Thrust** is the thrust of the engines times their total mass. | The **Total Thrust** is the thrust of the engines times their total mass. | ||
The **Acceleration** is the **Total Thrust** divided by the **Ship Mass**, in m/s². | The **Acceleration** is the **Total Thrust** divided by the **Ship Mass**, in m/s². | ||
+ | |||
^ Engine | ^ Engine | ||
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**Total Wet Mass** is equal to the ship **Mass**, plus the mass of fuel times its density. | **Total Wet Mass** is equal to the ship **Mass**, plus the mass of fuel times its density. | ||
+ | |||
+ | Full statistics for some future designs are available here: | ||
+ | * [[./ | ||
==== Mass ==== | ==== Mass ==== | ||
- | In // | + | In // |
- | + | ||
- | **YAGS SciFi** | + | |
Each // | Each // | ||
+ | |||
+ | Some craft are //Weak//, in which case total dry mass (including engines, living quarters, cargo hold etc) is multiplied by 0.75. This also has a negative impact on the hull strength of the ship (base soak x0.50). | ||
+ | |||
+ | Some are // | ||
=== Cargo === | === Cargo === | ||
- | The first is cargo space, which when full will count as 10,000kg per // | + | The first is cargo space, which when full can contain |
- | Each dt of cargo being carried therefore counts as +10dt to the ship's actual | + | An empty cargo hold has a mass of 100kg per dT, since it is mostly empty space. When loaded with cargo, the mass of the cargo is in addition to this. |
=== Fuel === | === Fuel === | ||
The second is fuel, which is often a liquid (sometimes solid) which completely fills the fuel tank with no space left over. Like cargo, fuel also has a density and so a full fuel tank increases the mass of the ship. Water counts as +14 per dt (14m³ of water has a mass of 14 tonnes, by definition), | The second is fuel, which is often a liquid (sometimes solid) which completely fills the fuel tank with no space left over. Like cargo, fuel also has a density and so a full fuel tank increases the mass of the ship. Water counts as +14 per dt (14m³ of water has a mass of 14 tonnes, by definition), | ||
+ | |||
+ | An empty fuel tank has a mass of 100kg per dT, again since it is mostly empty space. | ||
=== Supplies === | === Supplies === |
scifi/spacecraft.1577022185.txt.gz · Last modified: 2019/12/22 13:43 by sam