SpinLaunch

The basic premise makes very little sense to me. Orbital velocity is around Mach 25, so you're not going to spinlaunch anywhere close to that and you're still going to need a rocket motor to do most of the work. Going hypersonic at low altitude just dissipates energy like mad, so your efficiency is pants. An air breathing winged mothership does much better because it goes nice and slow through the thick atmosphere.
The tumble problem could be solved if the payload is held on a rotating platform, rather like a pedal on the end of a bicycle crank. It does mean the payload sees a rotating 10,000g rather than pure sideways g.
 
The all point is that kinetic energy comes from cheap out of a Mechanical system. And that's irrefutable.
Then you get limitations and they are pretty honest with it. You don't see them advertising point to point orbit transfer for 200$... Trying to raise billions for that.
 
Way too much bearded men for a clean room with only two of them wearing protective gown on their chin.
Investors are looking at details like this. If you don't enforce, what's the point of raising industry grade money while just being an overgrown garage lab?
 
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