Quote from: Bananas_on_MarsI did a quick calculation, a centrifugal launcher that supplies 2000m/s and has a 20m radius would mean about 20.000g...Is that a decimal point or have you mis placed a comma? 20g is less than an ICBM warhead at burn out. 20 000g is more like those GPS guided artillery shells the USN is currently using. Obviously both are possible but the latter needs a much more specialized skill set to build. Likewise quite small increases in diameter can lower the centripetal g load quite a lot.
I did a quick calculation, a centrifugal launcher that supplies 2000m/s and has a 20m radius would mean about 20.000g...
Sorry, german here, it's Twenty thousand g, we use a point for separating thousands, and a comma for decimal point.Didn't think about the audience here.
20k, on the order of an artillery shell. It definitely seems unreasonable. Even if your launch cost was much cheaper, it would require anyone who wanted to fly on their spinning death machine to overbuild their satellites, making them either less capable or increasing their weight...
Also gravity scales linearly with diameter for the given tangential speed. I am guessing you were thinking of small decreases in tangential speed will decrease the g load a lot.
People – the name is SPIN-launch. Think it through.
Quote from: HMXHMX on 02/26/2018 03:49 pmPeople – the name is SPIN-launch. Think it through.They're not going to do an atmospheric tether spin catapult?!? Right?I read elsewhere, speculatively they are spin launching a light gas gun to a high altitude, then fire the projectile from the gun, and gun lands in a reusable fashion. Somewhat rube goldberg and probably not scalable, even if feasible.
This (spinlaunch) is one of those concept that sound more and more bonkers the more you read about it. It’s a complete non-starter in every practical sense. If they can get funding, it will be an interesting failure. Mark my words. Prove me wrong!
an interview from Max Haot from a new rocket company called LAUNCHER that's based in New York.A little bit different approach, but pretty appealing IMO.Their Twitter Accountand a bare homepage
Yes, i fear they might be a little late to the show, but if their plans work out only partially, they might still be able to make a living by selling their engines... though their plans are quite ambitious, developing a RP1 ORSC with about 10 mio $...
New Engine-1 🔥 from today - 6 second run followed by a 15 second run. Next week - 30+ goal.
Smallsat launch providers face pricing pressure from Chinese vehiclesby Jeff Foust — March 19, 2018WASHINGTON — Companies that are developing small launch vehicles or who provide rideshare launch services say they expect new Chinese launch vehicles to drive down launch prices, raising concerns among some of unfair competition.
QuoteSmallsat launch providers face pricing pressure from Chinese vehiclesby Jeff Foust — March 19, 2018WASHINGTON — Companies that are developing small launch vehicles or who provide rideshare launch services say they expect new Chinese launch vehicles to drive down launch prices, raising concerns among some of unfair competition.http://spacenews.com/smallsat-launch-providers-face-pricing-pressure-from-chinese-vehicles/
No ITAR?