Liquid Methane and Oxygen Rocket Engine. - Neatorama

That's photo from a test firing of XCOR's new 7,500 pound thrust liquid methane and liquid oxygen rocket engine, developed for NASA for spacecrafts to and from the Moon and Mars.

Link: XCOR press release | New Scientist article

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Newest 3 Comments

The pattern of evenly spaced rings sometimes visible in the exhaust of an engine is typically referred to as shock diamonds or Mach disks. The phenomenon occurs anytime a flow exits a nozzle at supersonic speeds and at a pressure that is different than that of the external atmosphere.

http://www.aerospaceweb.org/question/propulsion/q0224.shtml

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...and by "enjines", I mean ENGINES...aargh, I need coffee...

--TwoDragons

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I wonder what physics are behind that neat "oscillating flame" look...? I've seen it before on other rocket enjines, and I've never figured out why it does that.

Either way, that looks WAY COOL!

--TwoDragons

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Surfers are friends, not food.

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If the danger of being attacked by sharks warrants buying an expensive special suit to hide from their senses, then maybe something is telling you not to take the risk in the first place.

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Um, yeah. All I can say is volumes have been written on what to plant or spray that will deter deer from browsing your garden to death. Does it work at all, or from year to year? - nope. Notice the author wrote that MOST sharks don't like to eat sea snakes.

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I've heard that sharks mistake a person in a black wet suit, for a seal. The black oval on the torso looks seal-shaped to me. I wonder if the shark thinks so too?

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