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the NASA thread and anything related
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Rishi
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That X video is hilarious. But the bible-thumping flat-earther harassing Neil Armstrong is just.... sad.
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someone didn't like the video it disappeared
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Rishi
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yay, it's back.
why someone even bothered to make the fakey video is puzzling.
why someone even bothered to make the fakey video is puzzling.
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Taken by the satellite Magellan in the 1990s, this image shows lava flows on the surface of Venus. This imaging radar photo cut through the thick clouds to see the surface. This scene in this photo is 500 kilometers across.
Expedition 71 Soyuz Rollout (NHQ202403180020)
The Soyuz rocket is raised vertical Monday, March 18, 2024, at launch pad Site 31 of the Baikonur Cosmodrome in Kazakhstan. Expedition 71 NASA astronaut Tracy Dyson, Roscosmos cosmonaut Oleg Novitskiy, and Belarus spaceflight participant Marina Vasilevskaya are scheduled to launch aboard their Soyuz MS-25 spacecraft on March 21. Photo Credit: (NASA/Bill Ingalls)
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2024 Total Solar Eclipse (NHQ202404080101)
A total solar eclipse is seen in Dallas, Texas on Monday, April 8, 2024. A total solar eclipse swept across a narrow portion of the North American continent from Mexico’s Pacific coast to the Atlantic coast of Newfoundland, Canada. A partial solar eclipse was visible across the entire North American continent along with parts of Central America and Europe. Photo Credit: (NASA/Keegan Barber)
Russian rockets often have many engines because of a design philosophy that prioritizes redundancy and efficient thrust generation by using multiple smaller engines rather than a few very powerful ones, allowing for better performance even if one engine fails, and often stemming from their focus on developing highly efficient liquid fuel engines with multiple combustion chambers within a single engine unit, which can appear as "many engines" on a single stage.
Key points about Russian rocket engines:
- Redundancy:
Having multiple engines means that if one fails during launch, the remaining engines can still provide enough thrust to complete the mission, improving reliability.
- Efficient Design:
Russian engineers often focus on optimizing existing engine designs, like the "staged combustion cycle," by splitting the combustion process into multiple chambers within a single engine, leading to a high thrust-to-weight ratio.
- Historical Context:
This design approach originated in the Soviet era when there was a strong emphasis on developing powerful intercontinental ballistic missiles, which required high thrust with a focus on reliability.
Example: The Soyuz rocket, a widely used Russian launch vehicle, has four engines on its first stage, each with multiple combustion chambers, which contributes to its overall high thrust capability.
How did the USSR manage to use so many engines on their rockets (Soyuz, Vostok, etc.)?
Answer (1 of 2): With great difficulty. There were 32 nozzles igniting all at once on a Soyuz mission booster. They managed to reduce that to twenty for the Vostok series. Getting that many to ignite at the same time had quite a learning curve, and the failures were spectacular and deadly. One o...
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