Jaluro Analysis
From TeamFrednetWiki
Contents |
Fundamental Analysis
The trip to and on the moon has several difficulties included. To know what Jaluro has to handle, the passage will be splitted into four parts and examined for all challenges waiting for Jaluro.
Earth Ground - Earth Orbit
Launching a Rocket from Earth into Orbit, requires to reach at least a velocity of approximatilly 7,5 m/s. This results into an acceleration of +6g (and maybe more) which acts on the rover. Very high vibrations will work on the Rover due to acceleration. During the gain of alltitude, pressure drops to zero (=vacuum). The outer temperature drops to 2°K. Even if the Rover is stowed in a storage compartment, the ambient temperature can be higher, but will be still very low. Any humidity on the Rover will freeze immediatilly. This can harm electronic parts and can also result in sticking of mechanical parts.
- High accelaration forces (+6g)
- High vibrations
- Very low outer temperature ( min. 2°K)
- Very low pressure (vacuum)
- Humidity
Earth Orbit - Luna Orbit
From this stage on, vacuum will be our constant attendent.
Reaching orbit and leaving the launchvehicle will most probably be a smooth action. As soon as the Lunar Bus gets unloaded, temperature decrement will come across, by trend to 2°K, until the Lunar Bus activates the transfer rockets. The second escape velocity, needed to leave Earth Orbit, is about 11,5 m/s. Since we are going to use a rocket system to reach this velocity, the accelleration will be very high, resulting again in high forces and vibrations. The rocket boost will bring a raise of temperature. The sun is also shinning and heats the Lunar Bus up. According to our Propulsion Team the avarage temperature during the jouney to the moon will be 150K - 250K. The trip needs, again according to our Propulsion Team, 7 days. After this period, we will enter moon orbit (will we?).
- extrem low temperature (possible 2K)
- rapid temperature change (from 2K up to 250K)
- vibrations
- accelleration forces (since we have allready a min. speed of 7,5 m/s accelleration will be lower)
Luna Orbit - Luna Surface
After seven draggy days, we will reach the moon orbit.
Unloading the Lunar Lander from the Lunar Bus happens hopefully smoothly. TeamFrednet plans to perform a softlanding. Since we have very high confidence in our Propulsion Team, it will be soft. Just for the worst case, Jaluro should be able to survive some ass kicking forces of -10g. The lander is equipped with a landing propulsion system to keep the Rover warm ;-). After reaching luna surface, the rover gets disembarked.
- deacceleration forces (?)
- vibrations
- tough landing possible (min prepared -10g)
- punctured strokes possible in case of hard landing
Luna Surface
After debarking, Jalura is on its own.
Luna has two periods, the luna day and the luna night. The luna day is around 14 earth days, the luna night as well. The temperature reaches close to the equator during a luna day max. 390K (luna surface - the atmosphere is insignificant) and during luna night, it drops to 70K. The temperature of the Rover depends during day now on the coefficient of reflexion of the rover skin. Nearly the entire luna surface is coverd with regolith , a very nasty dust. If everything worked well, we have a plain area around us without a stoniness condition. The lack of atmosphere implys also a lack of radiation protection. Cosmic rays, sun radition,... will hit the rover directly
- high temperatures during day (390K)
- low temperatures during night (70K)
- a long night period (14 earth days)
- nasty, sticky dust which penedrates almost everything
- high radiation
Luna Environment
For a more detailed information about the environment on luna, see the following links:
GLXP Tasks
For detailed information, see GLXP Mission Requirements.
Go back to Portal:Jaluro
