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originally posted by: tachyonator7
you may have heard of dean drive, cook drive etc. these devices do work but they produce very little thurst.
imagine yourself in a small boat. your hands and feet are tied, how do you move? naturally, you will jerk your body forward and come to sudden stops so that moment of inertia transfers to the boat and it moves forward. modern science will tell you this is due to "friction" which is totally ridiculous as this phenomena is independent of the enviroment.
take a perfectly sealed tube in space and within it a strong spring coil taut from one side to another. when fired the spring transfers it's elastic-potential energy to the tubes inner wall and the tube accelerates forward at a great speed.
No, they don't.
Try it in a symmetrical boat. You'll be there forever.
You're the one wanting to prove it. Why not build one and record it for us?
Personally, I like to strap buttered toast to the backs of cats. YMMV.
originally posted by: CraftBuilder
With the second impulse in mid air the tube is decelerated when the spring contracts and then the tube accelerates with the same amount of energy when the weight hits the end of the tube. The two actions cancel each other out. The first impulse only works because the tube tries to accelerate against the earth when the spring contracts.
originally posted by: CraftBuilder
Bedlam hit the nail on the head. Why do so many people these days have this sociopathic expectation of entitlement, wanting the rest of the world to expedite their whims for them. The onus is on you OP to prove this hypothesis for yourself.
originally posted by: tachyonator7
No, they don't.
yes, they do.
Try it in a symmetrical boat. You'll be there forever.
shape of the boat is irrelevant, it doesn't even have to be a boat, you can do it in a cart. jerking forward will make it move.
don't be lazy, find a spring and do the expriment. could it be simpler and easier to do? nope.
shape of the boat is irrelevant, it doesn't even have to be a boat, you can do it in a cart. jerking forward will make it move.
how do you move? naturally, you will jerk your body forward and come to sudden stops so that moment of inertia transfers to the boat and it moves forward. modern science will tell you this is due to "friction" which is totally ridiculous as this phenomena is independent of the enviroment.
Nope. Dean drives have been done to death. If anyone had ever gotten them to work, you'd see it everywhere. As you say, they're so very simple to do.
The CG of the thing will stay in the same place, unless the "cart" or "boat" is non-symmetrical in the way it moves. The standard test object for this sort of thing in freshman Newtonian physics is a gas puck sort of like you have on an air hockey table, only with co2 in for the gas supply. An awful lot of people have tried this. The only reason you think you're the only one is because you never had a physics class in uni.
You're the one making the claim. It's on you to prove it.
Friction is independent of the environment, or your movement is independent of friction? You should try to learn "modern science" before discarding it, unless you are fine stating you live in a world of magical science (physics), I presume circa the dark ages?
originally posted by: tachyonator7
it has been proven countless times over.
www.youtube.com...
cleary, you are the one who never had a physics class, moreover you proclaimed the basic laws of nature "impossible", it's hard to get any more ignorant than that.
originally posted by: CraftBuilder
This is not something you have to take on faith OP. If you have any scientific knowledge at all you should be able to try this out at home with any number of setups. It's not evil advanced physics that the entire scientific community throughout history has been lying to you about.