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Cake day: July 8th, 2023

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  • This does not entirely surprise me. When Tesla became well-known a significant fraction of taxi services in my country switched to Tesla. Why: a) it was cheaper to buy since subsidies for EVs, b) electricity being cheaper than fuel, and c) Tesla being perceived as luxury.

    Within a couple years most taxi services had gone back to ICE cars. The Teslas had inferior build quality, and repair turnaround time was awful compared to regular ICE cars. This meant a large fraction of the Tesla fleet was idle as they were waiting to be repaired.

    I wouldn’t be surprised if Hertz encountered the same. It’s not that EVs are bad. It’s that the largest supplier of EVs in the West, Tesla, is bad and slow to repair cars.







  • Venus is interesting. While the surface is extremely hostile, the upper atmosphere is maybe the most similar to Earth-like environment out there in the solar system. At about 50km up in the air, the air pressure is about 1 Earth atmosphere, and the ambient temperature is about 20C. A 80/20% nitrogen-oxygen gas mixture is buoyant too at that depth, so a balloon filled with breathable air will just float. A rupture won’t cause explosive decompression like it would on Mars either. In addition, the gravity one would experience is only very slightly less than that of Earth, and the large atmosphere also provides some shielding against radiation.

    Mars doesn’t have these perks. Mars is cold, really cold, with only 1/3rd of the gravity of Earth, has practically no radiation shielding, and any breach would cause explosive decompression and almost instant unconsciousness. On top of that, regular solar panels really don’t work that well on Mars because of the extra distance from the Sun, while solar panels would actually work better in the upper atmosphere of Venus.