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Copenhagen Suborbitals: The world’s only manned, amateur space program

copenhagensuborbitals.com

51–60 of 72 posts

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#51
post #28

I'm curious how a volunteer organization will achieve the culture and technical maturity to make human rated hardware without a high probability of a horrible death. Think about all the conditions in a long chain of events that must all go right, in a launch, to avoid cooking, freezing, squishing, cratering, asphyxiating, poisoning, exploding, or drowning your crew. After decades of practice, NASA ended up under 1:10…

It should be noted that, being strictly suborbital, both the challenges and risks are orders of magnitude lower than even a launch to LEO, and that unlike many space programs, they have quite a bit of prior history and information to draw on. I don't know whether this will be enough to reduce risk to near-NASA levels, however. I am curious as to whether those odds cited are of partial successes, safely-aborted launch…

Indeed, and things like micro controllers and materials have come a long way since the 60ties..

It's by no means cheap or trivial, but a lot of technology have been democratized since the 60ties..

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#52
post #32

Earlier quoted context omitted.

And yet everyday you (and everyone else) get in a car with much higher risk of death. Why the double standard for experimental space fight?

Do you really think car travel has a 1/100 chance of death, or is this a whoosh moment for me?

They've got their statistics confused.

Lifetime odds (in US) of death due to vehicle accident is 1/102. (https://www.iii.org/fact-statistic/facts-statistics-mortalit...)

But that's average lifetime odds, not mortality rate per journey. It's a statistic with a very different meaning. But I see how people get confused by all the different ways risk can be expressed.

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#53
post #32

Earlier quoted context omitted.

And yet everyday you (and everyone else) get in a car with much higher risk of death. Why the double standard for experimental space fight?

Do you really think car travel has a 1/100 chance of death, or is this a whoosh moment for me?

I do not think a trip in a car is that dangerous, but I recently ran across an article that suggested going to the hospital has approximately a 1/140 chance of death due to medical error, for what that's worth. That's per visit, not per lifetime.

"based on a total of 35,416,020 hospitalizations, 251,454 deaths stemmed from a medical error, which the researchers say now translates to 9.5 percent of all deaths each year in the U.S"

https://hub.jhu.edu/2016/05/03/medical-errors-third-leading-...

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#54

Earlier quoted context omitted.

Also regulation I’m not entirely sure how many countries would let you build what amounts to at least an intermediate range ballistic missile in the back yard. I’m actually wondering how did they get by with the multiple missile technology non proliferation treaties out there.

The majority of ITAR restrictions (and other similar export laws, in my experience) are for technologies that help with navigation and targetting, not propulsion. The technology to build an amateur rocket is a lot more widespread and easier to build locally or import. Besides, export restrictions are rarely absolute - they mostly just add paperwork to legally certify that neither you nor your clients are sending the…

ITAR restricts rocket engine engines above a certain specific impulse: https://www.law.cornell.edu/cfr/text/22/121.1

Try building an ICBM in your back yard and wait to see how long it will take for some government agency to come knocking.

And you don’t need to import it, making these publicly and not to mention possibly opening the plans to the public will trigger some alarms some where.

Even if you take national security concerns out of the equation there are a lot of other safety concerns that would get someone interested.

I personally would prefer that my naighbour won’t be assembling a liquid fueled rocket in their garage :)

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#55
post #43

Earlier quoted context omitted.

Hmm? The goal is to stick a person at the top of it. That's pretty much the definition of manned as far as I'm aware.

Writing it that way makes it sound like they've already achieved the goal, that they're already putting humans into space. Like, if just having it as a goal is sufficient, well heck, I could step onto my lawn tomorrow and declare my household a manned amateur space program.

Which would be just fine and acceptable, as long as you declared feasible plans for removing your entire lot from the ground and off to space :)

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#56

Earlier quoted context omitted.

Climbing the Everest has a 1:10 chance of death, yet many people try their luck every year. It's the same thing.

Fair, although I feel like with Everest, the fact that it's so risky is part of the point. Like, if hiking up Everest was perfectly safe, would people still treat it as some huge accomplishment?

I feel like you’re implying things are different with space flight, but I feel like they’re the same, no?

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#57
post #28

I'm curious how a volunteer organization will achieve the culture and technical maturity to make human rated hardware without a high probability of a horrible death. Think about all the conditions in a long chain of events that must all go right, in a launch, to avoid cooking, freezing, squishing, cratering, asphyxiating, poisoning, exploding, or drowning your crew. After decades of practice, NASA ended up under 1:10…

Maybe that's not their primary goal? People have taken horrifying risks to push frontiers throughout history. The Oregon Trail claimed an estimated 21,000 lives.* Perhaps they are willing to accept a higher risk of death? *Though, despite the horrific toll, the final odds of death on the O.T., once the dust had settled, were about 5% to NASA's ~4%.

[deleted]

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#58
post #21

One of the founders of Copenhagen Suborbitals are the now infamous Peter Madsen https://www.theguardian.com/global/2018/jan/07/copenhagen-ki...

Just curious: what's the purpose of your post ?

An example of entrepreneurial accomplishment. Peter Madsen desperately wanted to go to space. So far he has made it to confined space.

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#59
post #44

Earlier quoted context omitted.

"Copenhagen Suborbitals is the world’s only manned, amateur space program." The way this is phrased, it sounds like they've already achieved it, and I feel like that's a little bit intentional. They could have easily called it an "amateur manned space program", which would have lessened the ambiguity.

They are writing in a second (or third+) language. People learning English have to learn adjective order — it's a big, red bus; not a red, big bus – which could have contributed.

https://www.quickanddirtytips.com/education/grammar/commas-w...

I'm pretty sure it is "big red bus"[0] and not "big, red bus" unless you're using the comma for emphasis? Either way, as you say, it can't be "red, big bus" nor can it be "red big bus" because these adjectives are cumulative, not coordinating.

[0] https://www.quickanddirtytips.com/education/grammar/commas-w...

[1] https://dictionary.cambridge.org/grammar/british-grammar/abo...

Re: Copenhagen Suborbitals: The world’s only manned, amateur space program

#60
post #36

Cool project, but I always find it amusing when the word “suborbital” is used since it’s sort of a fancy way to say normal or not space. Reminds me this Feynman story: > Or his questioning of space shuttle engineers: ''They kept referring to the problem by some complicated name - a 'pressure-induced vorticity oscillatory wa-wa,' or something. I said, 'Oh, you mean a whistle!' 'Yes,' they said; 'it exhibits the charac…

I find the term is apt here, because 'space' is roughly defined as anything beyond 100km from Earth's surface (which they're aiming for). But reaching space is vastly easier than reaching orbit, which requires reaching a speed of about 28000km/h or 17000 mph, which they're definitely not aiming for!

That makes sense, I think I still think of an object reaching space as it can then stay there, vs just a peekaboo. :)
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