Spins

Anything educational to do with Rocketry and Space (This is for little and big kids ;))

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jaquecusto
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Spins

Postby jaquecusto » Sat Jan 28, 2017 11:32 pm

Why does water spin when it descends ...

Https://www.youtube.com/watch?v=H2maD0-CjnI

... and the rocket turns when go up?

Https://www.youtube.com/watch?v=dLYPPnIpl3s

Very strange, isn`t :shock: ?

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CATO
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Re: Spins

Postby CATO » Sun Jan 29, 2017 6:25 am

It is interesting that the effect is so noticeable only a few meters away (either side) from the equator.
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2017: 5,973 Ns (13.14% M)
Ns 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
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MattSR
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Re: Spins

Postby MattSR » Sun Feb 05, 2017 8:46 pm

Water spins due to Coriolis effect.

Rockets spin because the guidance systems and fins make them spin for stabilisation reasons. Once you are up high enough, the atmosphere becomes so thin that aerodynamic damping isn't enough, and you either need gyro-driven gimbals or spin stabilisation (which is a form of gyroscopic stabilisation)

MattSR
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Re: Spins

Postby MattSR » Sun Feb 05, 2017 8:50 pm

Ah ok - after watching that second vid, its not a spin stabilised rocket - not sure why that one is rotating..


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