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A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

Amazon beats Tesla

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Amazon beats Tesla

Post by sporter2k5 » Tue Nov 24, 2015 12:44 pm

It looks like Elon Musk got caught with his pants down.

http://www.engadget.com/2015/11/24/blue ... t-landing/


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Re: Amazon beats Tesla

Post by motorcyclepilot » Tue Nov 24, 2015 2:46 pm

Nice find! I got emotional watching the landing and may have teared up a bit. I had no idea that was possible.

It must use a lot of fuel in arresting the descent. Thinking a bit, I wonder why recovery chutes are not steerable like modern personal parachutes. They would greatly reduce the required fuel, I think.


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