Posted: 3/14/2017 8:49:13 PM EDT
 Engine 90 Simulated Flight Tank Pressure profile This is the engine we are going to fly. We are expecting ~150 miles altitude with it.  Engine 90 low pressure test. We ran it this afternoon at half pressure to get some numbers. I decided since it wouldn't be a full run I was going to stand behind it about 150 yards to film. It got warm, but wasn't that bad. |
 Sunset Hover this one was fun. |
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pressure equalization hum. Basically it takes a bit for the lox, ethanol, and helium to achieve zen! It's scary loud! Quoted:
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What is that harmonic during the first 15 seconds or so of burn? pressure equalization hum. Basically it takes a bit for the lox, ethanol, and helium to achieve zen! It's scary loud! Cool. Seemed like it tapered off once the nozzle heated up a bit. |
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Was this test in central Texas today? Nope. DFW area. http://www.fox4news.com/news/238279410-story |
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see above. 5500 at sea level, 6600 at launch site The diamonds inside the exhaust are shock diamonds. https://en.wikipedia.org/wiki/Shock_diamond |
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 https://www.youtube.com/watch?v=i3S6m-zqHA4
This is the engine we are going to fly. We are expecting ~150 miles altitude with it. https://www.youtube.com/watch?v=etNMhzkjTds
We ran it this afternoon at half pressure to get some numbers. I decided since it wouldn't be a full run I was going to stand behind it about 150 yards to film. It got warm, but wasn't that bad. We? Who's we, kemo sabe?? Northrop Grumman? Orbital ATK? |
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You're just shooting a parabola?  Isn't low ( lowww ) orbit just above 100 miles? "Space" is considered at 70 miles LEO is usually considered at around 200ish miles. Anything below usually tends to enter the atmosphere pretty quickly. Its an old argument. ISS is 270 miles and constantly needs to be reboosted into orbit. We realistically will be at around 100 miles with full payload. Empty we can hit 150 if we stretch the tanks. All these numbers are off the top of my head so don't take them as the gospel. |
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"Space" is considered at 70 miles LEO is usually considered at around 200ish miles. Anything below usually tends to enter the atmosphere pretty quickly. Its an old argument. ISS is 270 miles and constantly needs to be reboosted into orbit. We realistically will be at around 100 miles with full payload. Empty we can hit 150 if we stretch the tanks. All these numbers are off the top of my head so don't take them as the gospel. Thank you!!!! Very cool to know! Much luck and awesomeness with all of your endeavors!!! |