The Jimmy-hut - Mars Once

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The Jimmy-hut

LIVING ON MARS

The biggest difference between the Mars-one project and my Mars-once interpretation is that I put the priority on securing the living conditions over the research of the planet. Creating a place to relax and feel comfortable. Even where there will be the opportunity creating possibilities for a varied diet for someone‚Äôs wellbeing. Where are trees, herbs, bees, chicken, rabbits and edible fish in a pond.  
When all that is achieved one is in a position to explore and research. Then a person keeps having pleasure in exploration and will probably be more inventive. Like our European ancestors who never returned when they immigrated to e.g. Australia. They first secured their wellbeing before going to have another adventure.   

Before I'll give an example how to create an Earth-like environment we first need to know the conditions on the planet Mars. Mars gravitation is 0.38 of Earth. The air pressure is about 0.01 bar or in other words, 1% of that on Earth. Water boils under these almost vacuum conditions between the 7 and 10 degrees Celsius or 45-50 degrees Fahrenheit. The thin atmosphere consists of 95.32 % CO2, 2.7 % N2, 1.6 % Argon and only 0.13 % O2. The sun produces a high radiation because the thin atmosphere cannot reflect it like what is the case on Earth. Protection against this radiation will be created by covering parts of the base station by soil.   
Outside their protected environment people need to wear pressurized suits and air bottles. Mars conditions are not much more convenient than those on our moon.  

Let me try to explain how to create an Earth-like environment through the experience I obtained making a fish pond. There are two ways to build a pond. The first one is making it from armed concrete (or a grid with plaster) and then 'paint' it by an epoxy emulsion making it water-tight. Yet concrete (let it be armed or a grid made from iron) you don't have on Mars. The epoxy emulsion is easy to take with you on any expedition, but as long as one has no concrete or plaster, it'll be useless.
Then the second option, how I built the pond, is to create a 'bath' of rubber sheets and a thermal insulation blanket under it. The most suitable option for Mars, as long as we don't know the structure of its soil and the materials that are available to make something water and/or air-tight. Beside that rubber sheets weigh much lighter and are therefore easier to transport and work with than bags of cement and iron grids.      

My concept below is the lightest construction and least voluminous in materials you need to take with you from Earth. Volume and weight are our enemies on these long trips to other planets. Like air pressure, or the lack of it, is our enemy on Mars. The reason why everything needs to be made air-tight where human want to walk wearing casual clothes is of course that the construction needs to be pressurized till 0.8 to 1 bar. I call this construction the 'Jimmy-hut'. Jim after my first name and 'hut' after a comfortable most of time covered place. Think about 'Pizza-hut' or in the Dutch language a hideout boys create from wood.  

See the draft of my concept here below:


The main structure (F, D & C) is the aluminum 'gray' positioned on Mars surface. Encircled is an aluminum angled plate (D) of about 6 cm. thickness and 1.80 meter length by 1.20 meter width with two hinged parts (C) moving out to the left. This structure should be covered by rocks and soil (E) and as such pressing the aluminum structure to the direction of Mars surface. Pressure towards Mars surface is needed because the inside pressure from the direction of B is 0.8 atmosphere (bar) against a Mars pressure on the flexi glass A of only 0.01 bar.
The purposes of the aluminum structure (D & F) are to create a frame for the flexi glass windows (A) on top and to prevent these windows flying away due to the higher pressure (B) below.  
Glasses (A) should be double glassed or better less breakable double flexi glassed, separating and isolating the cold Mars temperatures from the relatively hot temperatures inside 'Jimmy's-hut'. Mars temperatures can be minus 50 degrees Celsius where the temperature in the greenhouse Jimmy-hut structure will be around plus 15 degrees. Again I need to emphasize not only pressure but also the heat, or the lack of it, is our enemy on Mars. (G is the rubber protection making the construction air-tight.)
The aluminum angled plate (D) is as such constructed that frame F fits in it. The aluminum structure as such is strong enough, if not even too strong, to be build on Earth. On Mars where the gravitation is 1/3 of Earth it is absolutely sufficient. However, I do have to admit that I don't know for sure whether this roof construction supported by Mars soil is sufficient to hold the difference in pressure of a mere one bar. It is just 1 atmosphere or one bar in pressure what is the difference, but when it concerns pressures zero to one, my knowledge is not enough. All pressures from 1 to let say 100 bar I understand. That is basic knowledge in physics or mathematics. But from almost zero to one can be completely different. There some bright head needs to complete me in knowledge.



Most of the structure is well protected against radiation under ground level or under a hill of soil. I do realize this draft, as any, may not be instantly clear to everyone. More detailed I'll explain it on the next page. The first Jimmy-hut will probably only be 30 meters deep. Thus covering a mere 300 square meters. Needless making it bigger as people need to know if it fulfills its expectations. However, it is a concept that theoretically can be made much bigger when it answers all criteria. Below an impression cut out of several pictures found on the internet:

The roof structure of aluminum and flexi glass need to be brought from Earth. Only slightly more volume is needed for the rubber sheets covering the below Mars surface excavation where trees or whatever will grow. These additional rubber rolled-up sheets don't have the volume that may create problems in transportation. The transportable volume of a 10 by 30 meters Jimmy-hut won't be more than 20 mtr2 with a weight of less than three tons. That for good living conditions on a new planet is not a price too high.

additional remarks:
-Instead of aluminum a better material will be kevlar. Aluminum has a chemical reaction with iron. I believe planet Mars is red because of the huge amount of iron on the surface.
-The windows on top allows sunlight to enter the Jimmy-hut, thus creating an Earth-like environment.
- Having built the hut one can experience how trees and herbs grow on Martian soil.    

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Criticism has risen on the glass roof as shown. Such should not be constructed on Mars due to the high solar radiation. Such a roof cannot protect someone from the radiation. I want to emphasize that I don't pretend to know everything and that the suggestions given should be studied and improved. Once I have gained more knowledge about the enormously high and dangerous radiation on the red planet, hopefully with your help and knowhow, we may be able to give an advice how to construct a saver Jimmy-hut.     

 
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