19 Comments

    CATO's are at 2:15 4:45 7:05

    VERY COOL!!! Another strike against those whack jobs that say, "Rockets don't work in space."

    I think your broken motor casing was from a greatly accelerated burn rate cased by the hot-melt glue. Those motors are just tightly packed gunpowder and their burn rate is established by the nozzle throat pressure at ignition. If you restrict ignition and build up additional pressure the resulting pressure inside the engine case will ramp up quickly. The nozzle lives in the balance between its strength and the pressure of the burning gunpowder.

    As to why the engine burned so quick…I'm pretty sure I saw at least part of the ceramic nozzle blow out of the engine casing. After that it was wide open. In normal condition the solid propellant is pressure limited in burn rate by the orifice the combustion escapes from. Once that's outta the way, all bets are off. It burns as fast as it can through the tube opening. I think the nozzle failed probably just from differing contraction rate, far as I know they are kinda inteference fit into the tube with a small amount of adhesive for good measure. But that adhesive can't hold it in place if the interference fit is lost or the nozzle frags. The solid propellant probably falls apart too once the nozzle is lost. I remember flying model rockets and every now and then get a bad motor that just kinda blew up on the pad and failed to climb (much) after blowing up a nozzle.

    It should… It has its own oxygen in the compound. The only question is whether the igniter will get hot enough to start the engine.

    That was crazy. It seems like it would have taken a lot of work, Ingenuity, and money.
    I hope the ads are compensating enough.

    40 seconds in, and I'm just impressed that the aquarium didn't explode from temp shock…where did you find a pyrex aquarium? LOL. Ever put cold water in a hot coffee decanter? Yeah, that. Much larger differential here. Guess I'll keep watching…

    Another thing that was very interesting was in the first two tests there was a very long delay before a sudden explosion making this test deceptively dangerous if you approuched the tank too soon!.

    everything on this channel is so damn cool

    Can anyone clarify why the rocket engine burned in just 3 seconds in liquid Nitrogen and in a vacuum?

    last one is really awsome!

    Pouring liquid nitrogen with gloves on is not the smartest thing to do. (not to mention the footwear)

    wow rocket engine burns in liquid nitrogen :O miracle ! and it burns the same as in vacuum… rockets have their own oxygen so why don't they burn the same in no oxygen environment ? you're genius ….

    Why didn't you place the tanks on some styrofoam instead of what looked like a solid disc of steel. That would have cut down on the heat transfer into the LN2.

    Rocket engine contains both fuel and oxidizer – it'll burn pretty much anywhere. Only water soaking the fuel or loss of the casing allowing oxidizer and fuel to separate would prevent ignition and combustion.

    But can it melt steel beams?

    i told my classmates that liquid oxygen exists.. they laughed at me and no one believed.. they said that oxygen cannot be turned into liquid.. the happiest moment of my life.. i realized that I am not dumb at my class after all..

    before i watch this, yes it can…
    most rockets, were DESIGNED to work in space… space is cold, colder than LN… and inert.
    so yes.
    OK now i'll watch.

    Edit: Yep, it burned

    不错,非常喜欢你们的视频,可以让我们看到很多看不到的世界

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