Shuttle Engine Start

[miatpa]

Yes, He was a great rocket man.

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[hyperdude144]

Too bad they retired the space shuttle:(

PLZ nasa make something similar to the space shuttle!

[k8l8m8]

This is how i start my car every day.

[Swabey89]

i love how the engines are spaced apart and then when ignited, move them selfs closer together in the correct postion

[demonikreaper]

It's called a "gimbal", where an object may rotate on it's axis. This is in place for the STSs vectored thrusting capability.

[Apollo580]

Wow. It's so hot that the flames are clear and white. o.O

[callesnegras]

What are tose three circles that seem to break open?

[miatpa]

I don't know, maybe someone else can say.

[dynamic717]

They are RCS (Reaction Control System) covers. They keep debris and birds from getting inside them while the vehicle sits on the pad.

[miatpa]

Makes sense...Thanks.

[weetnietgeen]

those are the side-to-side thrusters... those are used to keep the shuttle straight when it goes up, and when in space, its used to turn the thing... ;)

PS : sorry for my bad English.

[jontgjuuuu]

good!!!

[Zoomer30]

A lot of the motion you see is the stress from the tempeature differece. In temp in some parts of the engine can be over -300F while at the nozzle its over 2000F. They run liquid Hydrogen throgh tiny pipes in the engine nozzles to keep them cold.

[gsotodotcom]

More like closer to 4000F and they run they run the fuel through the engine nozzle not to keep it cool but to keep it from melting and evaporating away!

[thelawenforcer001]

love how they turn white after ignition.

[tkktkt]

I didnt know that the shuttles had to be "lit" by an external ignition source.

[miatpa]

They aren't actually "lit" like a fuse. what you see is a way to burn off extra gasses before the engines start. The engines ignite from inside.

[tkktkt]

ok thanks for explaining.

[TheYouuTubeRipper]

Do the nozzles move on their own or are they controlled? It looks as though they're wobbling from the force.

[miatpa]

They move apart while starting so they wont bang together and just before liftoff they are controlled to launch position,

[plasticalz]

They're on gimbal mounts.