Resource
A resource is a kind of material or energy that can be used, depleted, stored or generated by certain parts during missions. Common resources include liquid fuel and oxidizer, both of which are used in liquid engines, and electric charge, which has many different applications.
All means of resource storage are full when a craft is launched. All resources available in a craft can be viewed at any time during a mission using the Resources button at the upper right of the screen.
Available resources
The following table contains all the resources currently implemented.
| Resource | Density (kg/unit) | Cost ( /unit)
|
Flow mode | Renewable | Storable |
|---|---|---|---|---|---|
| Electric Charge | 0 | 0 | Everywhere[Note 1] | Yes | Yes |
| Liquid Fuel | 5 | 0.8 | Adjacent | No | Yes |
| Oxidizer | 5 | 0.18 | Adjacent | No | Yes |
| Intake Air | 5 | 0 | Everywhere | Yes | No |
| Solid Fuel | 7.5 | 0.6 | Internal | No | Yes |
| Monopropellant | 4 | 1.2 | Everywhere[Note 1] | No | Yes |
| EVA Propellant | 0 | 0 | None | Yes | No |
| Xenon Gas | 0.1 | 4 | Everywhere[Note 1] | No | Yes |
| Ore | 10 | 0.02 | Everywhere | No | Yes |
| Ablator | 1 | 0.5 | Internal | No | No |
- ↑ 1.0 1.1 1.2 Since 0.23.5 the resources will be drained from the first stages first, but is still available without plumbing.
Flow modes
Adjacent: Resources will only flow between adjacent sources and sinks, meaning that tanks can be drained unevenly.
Everywhere: The resource is always available to all parts structurally connected to the vessel, and the same amount of resources is drained from every container.
Internal: The resource can only be used by the part containing it.
Flow, transfer and crossfeed
Most resources can be transferred from one container to another part, which is usually done by right-clicking two containers while holding the mod key and then using the in and out buttons under the resource indicators. The transfer is stopped automatically once the source container is empty or the target container is full, but it can also be stopped manually using the stop button under the indicators. Multiple resources can be transferred at the same time, however the containers' right-click menus must stay open, otherwise the transfer will stop as well.
Another way to transfer resources is using a separate part. This is currently only possible for liquid fuel and oxidizer, using the FTX-2 External Fuel Duct.
Liquid fuel engines need the source of fuel directly adjacent to it or a connection via the fuel duct.
