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And compared to Hydrogen, it’s fuel tank would be 3.7 times smaller.So the fuel to oxidizer ratio helps make Methalox’s fuel tanks a lot closer to RP-1 than it is to Hydrolox.Another huge variable with any rocket engine is how efficient it is. If some of the hydrogen would leak out of the preburner, it would start a fire in the lox pump, which is catastrophically bad. In 2016, Musk referred to the “insane pressure” inside the main chamber of the engine, 300 bars, which required the development of a new metal alloy.Of course, Raptor’s other major innovation over its predecessor is the use of methane, which harkens back to SpaceX’s ultimate goal. Raptor and BE-4 is current, but not mission flown yet. Really too bad you went far, far against his advice.Sure, you can say any ONE thing using only one side of a piece of paper. And fingers crossed, it’ll be the first full flow staged combustion cycle engine to reach orbit too. YES. OH NOOOOOOO we just put a bunch of soot and clogged all your injectors. A fuel efficient engine is extremely important! They didn’t think a metal alloy existed that could withstand these crazy crazy conditions, and they didn’t believe the Soviets made such an efficient and powerful RP-1 powered engine until after the collapse of the Soviet Union and US engineers got to see them and test them out first hand! SpaceX’s ultimate goals are to develop a system capable of taking humans out to Mars and back over and over. You’re welcome internet.Enthalpy is basically the relationship between volume, pressure and temperature. Welcome to the closed cycle!The closed cycle or staged combustion cycle increases engine efficiency by using what would normally be lost exhaust and connects it to the combustion chamber to help increase pressure and therefore increase efficiency. So with an oxygen rich cycle, all of the oxygen actually goes through the preburner and just the right amount of fuel goes to the preburner. Raptor is the only (working) full-flow staged combustion engine on the planet at present. You only need enough to give the turbine the right amount of energy to spin the pumps fast enough to get the right pressures for the preburner and the combustion chamber to make the right power to shoot a thing into space AHSorry, so back to this oxygen rich preburner, that now hot gas oxygen is forced into the combustion chamber where it meets liquid fuel.
Running an RP-1 engine fuel rich means you’ll see some unburnt fuel appearing as dark clouds of soot. The conclusions were not good.“In order to keep the temperatures low, you can run the preburner at a less than optimal ratio, so either too much fuel known as fuel rich or too much oxidizer or oxygen rich.”I believe that only the fuel rich scenario keeps exhaust temperature cooler.
Tim’s diagram of a gas generator is right below it, so I’m assuming it’s a gas generator, although I could be wrong.It’s the RL-10 expander cycle engine. Now to end this, technically the RD-180 and the F-1 are 100% reliable, but with the F-1 never having any shut down at all in flight, it gets the bold here… and depending on how you define success and reliability, technically, the RD-180 is only kind of 100% reliable, because it got really really lucky once.One time it shut down 6 seconds early, on an Atlas V mission in 2016, due to a faulty valve, but the mission went on to be a success because of some pure luck with the centaur upperstage having enough spare Delta V to carry out the mission! The prototype however was to be designed:The USAF contract called only for the development and build of a prototype, to be demonstrated in a USAF-supervised set of tests. One metric we’re going to talk about, but only generally is the cost associated with each fuel. So, it’s safe to assume it’s going to be more expensive than diesel fuel. So for the sake of 0.16 percent difference in trying to get a more efficient fuel burn for the turbines by a few percent out of that small 0.16 percent seems a rather waste. Blue Origin’s BE-4 has potential to be truly game changing at around $133 : kN over 25 flights, which could make it about as cheap to operate than the Merlin at $117 per kN per flight. No, Blue doesn't have a lot of experience building engines; the company has built 4 flight articles of the BE-3 and has yet to complete a flight article BE-4. Elon has said SpaceX produce the Raptor for cheaper than or close to the Merlin engine in later simplified Raptor versions.
And compared to Hydrogen, it’s fuel tank would be 3.7 times smaller.So the fuel to oxidizer ratio helps make Methalox’s fuel tanks a lot closer to RP-1 than it is to Hydrolox.Another huge variable with any rocket engine is how efficient it is. If some of the hydrogen would leak out of the preburner, it would start a fire in the lox pump, which is catastrophically bad. In 2016, Musk referred to the “insane pressure” inside the main chamber of the engine, 300 bars, which required the development of a new metal alloy.Of course, Raptor’s other major innovation over its predecessor is the use of methane, which harkens back to SpaceX’s ultimate goal. Raptor and BE-4 is current, but not mission flown yet. Really too bad you went far, far against his advice.Sure, you can say any ONE thing using only one side of a piece of paper. And fingers crossed, it’ll be the first full flow staged combustion cycle engine to reach orbit too. YES. OH NOOOOOOO we just put a bunch of soot and clogged all your injectors. A fuel efficient engine is extremely important! They didn’t think a metal alloy existed that could withstand these crazy crazy conditions, and they didn’t believe the Soviets made such an efficient and powerful RP-1 powered engine until after the collapse of the Soviet Union and US engineers got to see them and test them out first hand! SpaceX’s ultimate goals are to develop a system capable of taking humans out to Mars and back over and over. You’re welcome internet.Enthalpy is basically the relationship between volume, pressure and temperature. Welcome to the closed cycle!The closed cycle or staged combustion cycle increases engine efficiency by using what would normally be lost exhaust and connects it to the combustion chamber to help increase pressure and therefore increase efficiency. So with an oxygen rich cycle, all of the oxygen actually goes through the preburner and just the right amount of fuel goes to the preburner. Raptor is the only (working) full-flow staged combustion engine on the planet at present. You only need enough to give the turbine the right amount of energy to spin the pumps fast enough to get the right pressures for the preburner and the combustion chamber to make the right power to shoot a thing into space AHSorry, so back to this oxygen rich preburner, that now hot gas oxygen is forced into the combustion chamber where it meets liquid fuel.
Running an RP-1 engine fuel rich means you’ll see some unburnt fuel appearing as dark clouds of soot. The conclusions were not good.“In order to keep the temperatures low, you can run the preburner at a less than optimal ratio, so either too much fuel known as fuel rich or too much oxidizer or oxygen rich.”I believe that only the fuel rich scenario keeps exhaust temperature cooler.
Tim’s diagram of a gas generator is right below it, so I’m assuming it’s a gas generator, although I could be wrong.It’s the RL-10 expander cycle engine. Now to end this, technically the RD-180 and the F-1 are 100% reliable, but with the F-1 never having any shut down at all in flight, it gets the bold here… and depending on how you define success and reliability, technically, the RD-180 is only kind of 100% reliable, because it got really really lucky once.One time it shut down 6 seconds early, on an Atlas V mission in 2016, due to a faulty valve, but the mission went on to be a success because of some pure luck with the centaur upperstage having enough spare Delta V to carry out the mission! The prototype however was to be designed:The USAF contract called only for the development and build of a prototype, to be demonstrated in a USAF-supervised set of tests. One metric we’re going to talk about, but only generally is the cost associated with each fuel. So, it’s safe to assume it’s going to be more expensive than diesel fuel. So for the sake of 0.16 percent difference in trying to get a more efficient fuel burn for the turbines by a few percent out of that small 0.16 percent seems a rather waste. Blue Origin’s BE-4 has potential to be truly game changing at around $133 : kN over 25 flights, which could make it about as cheap to operate than the Merlin at $117 per kN per flight. No, Blue doesn't have a lot of experience building engines; the company has built 4 flight articles of the BE-3 and has yet to complete a flight article BE-4. Elon has said SpaceX produce the Raptor for cheaper than or close to the Merlin engine in later simplified Raptor versions.