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Joined 1 year ago
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Cake day: June 16th, 2023

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  • I don’t know where you found this number, the commercial crew contract was awarded by NASA in September 2014 to SpaceX and Boeing (Boeing getting twice the amount of money than SpaceX). It was expected that two crew capsule would be certified by NASA in 2017.

    SpaceX only certified the capsule Crew Dragon with a crewed launch in 2020, so 3 years delay. In the mean time NASA is still waiting for Boeing to do its first crewed Starliner launch.

    There is plenty of reason to hate Musk but people at SpaceX did accomplish great things.

    Without SpaceX NASA would still be relying on Soyuz to send astronauts to the ISS.




  • On the other hand I did took care of a pool for a while, it was in a villa that my in laws owned.

    We did a few things that helped lowering the maintenance cost and the pool was pristine.

    First thing is a salt chlorinator. It keeps a constant (low) chlorine level so the pool stays clean, there is no more chlorine smell and you only need to top up salt after too much rain.

    Then we were using hardware store muriatic acid to bring the pH up and baking soda to control alkalinity. We still went to the pool store to get productd for the calcium hardness and cyanuric acid.

    The last thing is a bit more involved but this is what made the biggest difference on the bill is to replace the pump with a DC pump directly connected to refurbished solar panels, no batteries, no inverter. This way when there is a lot of sun the pump is running a lot, a little sun and the pump is running a little.

    It’s perfect since the amount of algae development is proportional to the amount of sunlight. There is almost no electronic in the system, just a extremely reliable DC pump and solar panels that can last for decades, I found that to be a great low-tech solution.

    However we were in a tropical country, I have no idea if this would apply in another climate.





  • Antoine de St Exupéry is a French aviator and writer who opened airmail route between Europe, Africa and South America.

    One day he flew back from Africa to France with a Berber, someone who lived in the Sahara desert. As they flew through the Alps he saw all the waterfalls, lakes, streams, rivers …

    At this point he told the St Exupéry that his the god of French people must love them more that their own god.