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Everything posted by J.Random
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Secret Sound Easter Egg Thing! [Might be Chatterer]
J.Random replied to waterlubber's topic in KSP1 Discussion
Yup, this jpeg definitely mumbles something. -
So, OrbitalATK wants to commercialize Antares....
J.Random replied to fredinno's topic in Science & Spaceflight
Now I feel stupid. Thanks. =) Live and learn. -
So, OrbitalATK wants to commercialize Antares....
J.Random replied to fredinno's topic in Science & Spaceflight
Dang it, always mix them up. Okay then. Still, no idea what this "Russian Engine of the 200-series" is about. -
So, OrbitalATK wants to commercialize Antares....
J.Random replied to fredinno's topic in Science & Spaceflight
Which one would that be?Most of the RD-02XX are UDMH engines They were supposed to switch to RD-193 (RD-181). They've even bought two, but... Surprise! Engines are under sanctions and US is going to build their own engine (or at least has declared the intention to spend money on development). Seeing as Orbital goes against the flow of idiocy in US government, there is a good chance that they won't get any more engines. Or contracts. -
A solution to California's Water Crisis AND lack of jobs!
J.Random replied to fredinno's topic in Science & Spaceflight
Come on, it's just Canada. No big deal. -
What if NASA was merged with the USAF?
J.Random replied to fredinno's topic in Science & Spaceflight
And I wouldn't like to think that Mr. Musk would start hiring military retirees like, you know, Boeing or Lockheed Martin (or, I suppose, as any other large military contractor) do. -
I thought that expansion and contraction goes on at the same time. Outer layer expands as hot gas (red giant) while at the same time innards condense into a white dwarf. Then gas cloud cools down and what remains is a dwarf.
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What if NASA was merged with the USAF?
J.Random replied to fredinno's topic in Science & Spaceflight
USAF as in "US Air Force"? There would be no NASA. Also, there probably would be no SpaceX. -
Switch to another range model?
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Huh. I wonder why they didn't go kaboom already. Shouldn't tidal forces mess up the whole "gravity vs radiation pressure" balance when stars get that close to each other?
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So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
No it doesn't. If I remember school right, kinetic friction doesn't depend on object's velocity. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
*sigh This is pointless. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
For [any deity of choice]'s sake, it's a well known thought experiment, and yes, it states that there's some sort of a control system which speeds up the conveyor belt if needed, matching airplane's speed in the opposite direction. In terms of control theory, it's a perfect negative feedback loop. It won't work against airplane because airplane doesn't push against the conveyor, it pushes against air which isn't controlled by the feedback. It will work against the car because any torque the car applies will speed up its wheels -> conveyor goes faster -> car stays on the spot. And if we're talking about zero internal friction, both for the car and conveyor, and perfect wheel grip on conveyor belt - there's no need in any control system. Any torque that engine applies will speed up the wheels and conveyor anyway - and the car will STILL stay at the same spot. End of story. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
The conveyor spins back to match the speed of anything on it, trying to keep it at the same spot. In case of a car, conveyor doesn't have to do anything, it just has to spin freely, yes. In case of an airplane, conveyor actively tries to stop the airplane and fails. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
And yet the conveyor cannot push it back (well, forward). Essentially, it acts as a frictionless surface. The car will not move. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
Nope. This power will go into spinning wheels even faster, which doesn't mean that the car will move. -
So, you have a plane on a conveyor belt...
J.Random replied to Randazzo's topic in Science & Spaceflight
Which is exactly why the car will stay at the same spot, spinning its wheels with infinite speed. Which is also why airplane _will_ move: the air will push it with the equal force airplane applies to it. Seriously, guys, why is this discussion still going? It should have ended on page 1. -
NASA's permanent Mars colony plan
J.Random replied to Soda Popinski's topic in Science & Spaceflight
NASA's riding the wave (I'm not saying it's a bad thing). -
Slime Molds as a Cleaning Solution
J.Random replied to 0111narwhalz's topic in Science & Spaceflight
OP, you've been watching "(A Town Called) Eureka" lately, haven't you? -
What is the most dangerous chemical that you know about
J.Random replied to Ethanadams's topic in Science & Spaceflight
Iron. This stuff kills stars. -
Should I also check for "asbestos-free" sticker?