7 ms·

Not from Zurich, but from an ocean platform 20km from the coast of every big coastal city. High speed trains (350km/h) will go direct to the airport from every

by cnlevy 3y ago

Not from Zurich, but from an ocean platform 20km from the coast of every big coastal city. High speed trains (350km/h) will go direct to the airport from every city less than 500km away. I agree landlocked Zurich will have a hard time to get a spaceport. Have a look at https://en.wikipedia.org/wiki/Kansai_International_Airport https://en.wikipedia.org/wiki/Kansai_International_Airport

m4rtink 3y ago
Bodensee will do: https://en.m.wikipedia.org/wiki/Lake_Constance https://en.m.wikipedia.org/wiki/Lake_Constance
- cnlevy 3y ago
  Good idea, but the lake is too narrow for that From the Starship Noise Assessment https://www.faa.gov/sites/faa.gov/files/2022-06/AppendixB_NoiseAssessment.pdf https://www.faa.gov/sites/faa.gov/files/2022-06/AppendixB_No..., it looks like you need maybe 20 miles distance for a tolerable level of noise (around 100 dB) So I'm not sure regular launches from the lake will be tolerated by the lake shore's inhabitants. This is why Starship launch platforms should be 30km from shore (not 20km as I wrote previously)
imtringued 3y ago
You literally can't build the spaceport that far away, if you are doing it over water, because there is nothing stopping the sound. https://www.bbc.com/future/article/20230306-just-how-loud-is-a-rocket-launch https://www.bbc.com/future/article/20230306-just-how-loud-is... >Even 1.5 miles (2.4km) away, the noise from a Saturn V launch was recorded as being 120 decibels https://www.wkcgroup.com/tools-room/inverse-square-law-sound-calculator/ https://www.wkcgroup.com/tools-room/inverse-square-law-sound... Gets you 101.6 decibels from 20 km away. Okay, how about 200 km over water? 81.6 decibels. Okay as a yearly event, not something that should happen every week. Okay, how about 2000 km over water? 61.6 decibels. What was the point of this idea again?

by cnlevy 3y ago

m4rtink 3y ago

Bodensee will do: https://en.m.wikipedia.org/wiki/Lake_Constance https://en.m.wikipedia.org/wiki/Lake_Constance

cnlevy 3y ago
Good idea, but the lake is too narrow for that From the Starship Noise Assessment https://www.faa.gov/sites/faa.gov/files/2022-06/AppendixB_NoiseAssessment.pdf https://www.faa.gov/sites/faa.gov/files/2022-06/AppendixB_No..., it looks like you need maybe 20 miles distance for a tolerable level of noise (around 100 dB) So I'm not sure regular launches from the lake will be tolerated by the lake shore's inhabitants. This is why Starship launch platforms should be 30km from shore (not 20km as I wrote previously)

imtringued 3y ago

You literally can't build the spaceport that far away, if you are doing it over water, because there is nothing stopping the sound. https://www.bbc.com/future/article/20230306-just-how-loud-is-a-rocket-launch https://www.bbc.com/future/article/20230306-just-how-loud-is... >Even 1.5 miles (2.4km) away, the noise from a Saturn V launch was recorded as being 120 decibels https://www.wkcgroup.com/tools-room/inverse-square-law-sound-calculator/ https://www.wkcgroup.com/tools-room/inverse-square-law-sound... Gets you 101.6 decibels from 20 km away. Okay, how about 200 km over water? 81.6 decibels. Okay as a yearly event, not something that should happen every week. Okay, how about 2000 km over water? 61.6 decibels. What was the point of this idea again?