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zetreque » July 3rd, 2016, 11:55 am wrote:As you reach space the air becomes more and more thin so it's harder to get there for one. In other words, it's propeller blades have nothing to push off of, as you said no air. So this is where it needs rocket fuel which amounts to a great deal of weight or mass that you have to deal with. To convert from propeller propulsion to rocket propulsion... I have probably never heard of such a thing because it's not feasible.
I have no idea what you mean about the aluminum ball, but welcome to the forums. :)
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Myuncle » Sun Jul 03, 2016 10:14 am wrote:Not necessarily lighter, but warmer. Anything warm in the atmosphere tends to go up.
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zetreque » July 3rd, 2016, 12:16 pm wrote:Myuncle » Sun Jul 03, 2016 10:14 am wrote:Not necessarily lighter, but warmer. Anything warm in the atmosphere tends to go up.
That is because warm air is less dense than cool air.
You can't heat the air inside of your container and make it less dense without it expanding. If your container keeps it from expanding, it's not going to do anything except explode.
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Myuncle » Sun Jul 03, 2016 10:20 am wrote:zetreque » July 3rd, 2016, 12:16 pm wrote:Myuncle » Sun Jul 03, 2016 10:14 am wrote:Not necessarily lighter, but warmer. Anything warm in the atmosphere tends to go up.
That is because warm air is less dense than cool air.
You can't heat the air inside of your container and make it less dense without it expanding. If your container keeps it from expanding, it's not going to do anything except explode.
I mean that if the sealed drone manages to fly near the ground, it would manage to go even faster where the atmosphere becomes thinner.
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Myuncle » Sun Jul 03, 2016 10:06 am wrote:If you put a bird inside a transparent plastic bag, doesn't the bird manage to fly? Maybe very slowly, but it flies.
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Watson » July 3rd, 2016, 12:30 pm wrote:Back up a bit. A bird in a bag will just flop around on the ground. If the bag is big enough the bird may fly around inside but it will never cause the bag itself to fly, from the bird efforts inside.
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zetreque » July 3rd, 2016, 12:36 pm wrote:A bird or drone or anything in a sealed container isn't going to interact with what is outside of the container and therefore not going to move.
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Watson » Sun Jul 03, 2016 11:05 am wrote:Actually I don't think a fan blade is the same as a propeller blade. I think a fan on a skateboard will just fan the air.
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