Comments by "mpetersen6" (@mpetersen6) on "Integza" channel.

  1. Maybe 30 years ago Analog had an article about Henri Coadă. And the Coandă Effect. At the time they theorized that it would be possible to build a VTOL craft that utilized a large high bypass Turbofan engine to power it. And really that's how the Dyson fan works. It employs the Coandă Effect. And it's not the first device on the market to use the effect. There is a company that sells evaluators for confined space entry that are powered by compressed air. They run at up to 100 to 1 in terms of how many cubic unit of air moved for every cubic unit introduced.
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  2. I've got an idea for a combination heat shield/rocket engine. Fiscripyion below 1) Central combustion chamber/s feeding a ring of nozzles that are oriented at 45° from the forward axis. The nozzles basically point in the opposite direction as normal. 2) The exhaust gases flow over an arched surface towards the perimeter. In profile the arch would only be one half of a full arch. 3) At the perimeter have a series of flaps that extend below the perimeter of the arched arched surface. 4) As the engine functions the gas flow across the surface increases pressure across the surface. The flaps at the outer edge cause gases to build up increasing the pressure at the edge. Think of the engine as being similiar to a blown wing on an aircraft. In reality the engine could probably be tested with low temperature materials using steam or even water sprayed at high presdure across the surface. The idea isn't to achieve an engine capable of propelling the vehicle in the launch phase. But instead to have an engine that would use the same structure as the re-entry heat shield as it's working surface. This could be used in an orbital vehicle that re-entry tail first and lands vertically. And while rocket engines work by ejecting a gas at high velocity and pressure that pressure is acting on the engine bell or aerospike surfaces as it expands to produce thrust.
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  3. Out of all the DYI, tech, nerd channels on YouTube imo you're in the top 10.
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  4. Congratulations, you re-invented the Motor Jet. Still cool though. https://www.google.com/url?sa=t&source=web&rct=j&url=https://en.wikipedia.org/wiki/Motorjet&ved=2ahUKEwi8-oWwh97yAhXtQ98KHZryBz0QFnoECAgQAQ&usg=AOvVaw1EJ0rvxGhZzrd5x9vjz6l3
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  5. My understanding is that a liquid monopropellant* can also be a liquid that has the fuel and oxidizer combined in one. One such fuel/oxidizer mix that has been proposed is a Liquid Oxygen/Aluminum/Aluminium slurry for operations on the Moon that only involve to and from lunar orbit. Its specific impulse isn't great but the rare materials for the fuel are all around you. Both elements are extremely abundant in the lunar regolith. *Solid rockets are also an example of monpropellants that have their oxidizer mixed in. Another example is gunpowder.
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  6. Smaller should be better, right? Marvin the Martians space modulator. 🤔🤔
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  7. The common thought is that a rocket engine works simply by ejecting a hot high speed gas one way and the rocket engine moves the other way. It's a little more complicated than that. Yes you have a hot high speed gas but that gas also has high pressure. It is this high pressure interacting with the engine bell that works to transfer that pressure into thrust. An aerospike is an inside out engine bell. But since there is pressure involved here what if take the aerospike and squash it so that instead it is much larger in diameter than its length. No we move the combustion chambers to the center of the engine and flow this high pressure gas out radially across the surface. At the the perimeter of the surface we place a fence that extends above the surface. The gas flow then piles up against this outer area to get the maximum amount of pressure against the surface as possible. Because this surface is by design handling the temperatures of a hot gas . We also use this surface for a heat shield for re-entry. Would this work? A simple test rig using propane or even water under pressure would be fairly easy to build.
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