Difference between revisions of "Railroad"
| Line 4: | Line 4: | ||
Elon Musk's initiative to develop the ''hyperloop'' technology allows the anticipation of a very similar transportation system on Mars. Compared to the terrestrial concept it would require only a thin-walled tube. The air pressure in the tube would be slightly higher than the surrounding Martian atmosphere, preventing the invasion of dust. Musk himself imagines a version without a tube on Mars. | Elon Musk's initiative to develop the ''hyperloop'' technology allows the anticipation of a very similar transportation system on Mars. Compared to the terrestrial concept it would require only a thin-walled tube. The air pressure in the tube would be slightly higher than the surrounding Martian atmosphere, preventing the invasion of dust. Musk himself imagines a version without a tube on Mars. | ||
| + | |||
| + | == Energy requirements == | ||
| + | Rolling equipements is subject to a number of forces, which together define the energy requirements of a rail system. On Mars, the air resistance is negligible and can be discounted except at very high velocities. Rolling friction should also be significantly lower. | ||
==Use cases== | ==Use cases== | ||
| Line 15: | Line 18: | ||
===Connection between two settlements=== | ===Connection between two settlements=== | ||
Railroad covers both short and long distances. Even in the far future with more than one settlement on Mars, people will still be interested in efficient transportation systems. Only a magnetic levitation system might have a better energy balance. | Railroad covers both short and long distances. Even in the far future with more than one settlement on Mars, people will still be interested in efficient transportation systems. Only a magnetic levitation system might have a better energy balance. | ||
| + | |||
| + | == Railroad construction == | ||
| + | Much of the cost of railroad construction lies in the cost of the infrastructure required to support the rails. Mars has interesting advantages as there are no swamps and essentially no soil, therefore it should be fairly simple to create a track way that is structurally sound without moving too much regolith around. | ||
| + | |||
| + | As the friction of the train will be less, the grades that a Martian railroad can climb will be less than on Earth. So the preparation of very low slopes might require extensive Earth works. On the other hand, a track might be provided with linear motors over steep grades, making the grade requirements much less important. | ||
==Open issues== | ==Open issues== | ||
| + | |||
*Can the railroad be built lighter because of the lower [[gravity]], or is the inertia of the train the main parameter? | *Can the railroad be built lighter because of the lower [[gravity]], or is the inertia of the train the main parameter? | ||
*How much [[energy]] is needed under Martian conditions to produce 1 km railroad? | *How much [[energy]] is needed under Martian conditions to produce 1 km railroad? | ||
[[Category:Surface Transportation Networks]] | [[Category:Surface Transportation Networks]] | ||
Revision as of 04:45, 21 April 2019
Railroad is a commonly used transportation system on Earth, and it can be used on Mars as well. Iron as the main construction material is abundant on the Martian surface. Compared with most other transportation systems, the railroad is basically lo-tech and can, therefore, be maintained with low effort.
Compared with rovers a railroad system is rather inflexible, but it can have an advantage for frequently used ways. On the long run it allows energy optimized transport. No batteries or fuels are necessary if electrical engines are used. Especially for driverless material transport it can be a central part of the settlement's infrastructure.
Elon Musk's initiative to develop the hyperloop technology allows the anticipation of a very similar transportation system on Mars. Compared to the terrestrial concept it would require only a thin-walled tube. The air pressure in the tube would be slightly higher than the surrounding Martian atmosphere, preventing the invasion of dust. Musk himself imagines a version without a tube on Mars.
Contents
Energy requirements
Rolling equipements is subject to a number of forces, which together define the energy requirements of a rail system. On Mars, the air resistance is negligible and can be discounted except at very high velocities. Rolling friction should also be significantly lower.
Use cases
The transport of a maintenance team
Peripheral parts of a Martian settlement might be several kilometers away from the living quarters. Energy generating stations (e.g. solar panels, wind turbines) are spread over a large area. A light weight railroad system reduces the maintenance costs on the long run.
Transportation in tunnels
Parts of the colony will be underground. During mining activities a railroad system provides a comfortable transportation of material and persons over long underground distances.
Connection between two settlements
Railroad covers both short and long distances. Even in the far future with more than one settlement on Mars, people will still be interested in efficient transportation systems. Only a magnetic levitation system might have a better energy balance.
Railroad construction
Much of the cost of railroad construction lies in the cost of the infrastructure required to support the rails. Mars has interesting advantages as there are no swamps and essentially no soil, therefore it should be fairly simple to create a track way that is structurally sound without moving too much regolith around.
As the friction of the train will be less, the grades that a Martian railroad can climb will be less than on Earth. So the preparation of very low slopes might require extensive Earth works. On the other hand, a track might be provided with linear motors over steep grades, making the grade requirements much less important.
