CRS-10 | Falcon 9 First Stage Landing
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3. Judge-Jake commented 7 years ago
If you are religious and have enough money to take a trip in this vehicle, this will be known as the 'C YEAP L FM' close your eyes and pray like feck moment. 
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4. tomthecabinboy commented 7 years ago
And now in reverse!!
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5. torbengb commented 7 years ago
#2 you're right. On the way up, it needs to lift the rocket, the payload, the fuel for the trip up, AND the fuel for the trip down. That's a lot more than "just" carrying the remaining fuel for the trip down. I can't give you specific numbers on this though.
Interestingly, this kind of landing is called a "suicide burn" because unless you nail the landing, boom. Going too fast, you can't brake hard enough before going boom. Going too slow, you'll fall the rest of the way, also going boom. Running out of fuel, you'll also fall, also going boom. The precision of landing a rocket this way is mind-boggling.
Interestingly, this kind of landing is called a "suicide burn" because unless you nail the landing, boom. Going too fast, you can't brake hard enough before going boom. Going too slow, you'll fall the rest of the way, also going boom. Running out of fuel, you'll also fall, also going boom. The precision of landing a rocket this way is mind-boggling.
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6. kirkelicious commented 7 years ago
#1
The structures of rocket stages are extremely lightweight. A decent estimate would be, that the stage only weighs around 5-7% of its original weight when it is jetisoned. (Only the one stage, not even counting payload and the second stage).
The first stage barely leaves the atmosphere. After a short entry burn, the stage is aerodynamically slowed down to terminal velocity and navigated to the landing platform by fins, a process that does not reqire fuel at all. The little fuel that is spent for maneuvering over the landing platform, stabilizing the rocket and the final burn of the landing, only amounts to a tiny fraction of the overall fuel costs (I reccon less than five percent of the total fuel consumption of the rocket). That extra fuel however replaces valuable Payload capacity. Spacex gives the figure of 30% reduction in payload for a stage recovery.
#5
For some ballpark figures about fuel weight in rocketry I recommend this informative yet entertaining read:
https://www.nasa.gov/mission_pages/station/expeditions/expedition30/tryanny.html
The structures of rocket stages are extremely lightweight. A decent estimate would be, that the stage only weighs around 5-7% of its original weight when it is jetisoned. (Only the one stage, not even counting payload and the second stage).
The first stage barely leaves the atmosphere. After a short entry burn, the stage is aerodynamically slowed down to terminal velocity and navigated to the landing platform by fins, a process that does not reqire fuel at all. The little fuel that is spent for maneuvering over the landing platform, stabilizing the rocket and the final burn of the landing, only amounts to a tiny fraction of the overall fuel costs (I reccon less than five percent of the total fuel consumption of the rocket). That extra fuel however replaces valuable Payload capacity. Spacex gives the figure of 30% reduction in payload for a stage recovery.
#5
For some ballpark figures about fuel weight in rocketry I recommend this informative yet entertaining read:
https://www.nasa.gov/mission_pages/station/expeditions/expedition30/tryanny.html
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About this video
Category: Technology
Published: 7 years ago
Submitted by: thundersnow
Views: 1,219
Rating:
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Length: 55 seconds
Filesize: 6.6 megabytes
Dimensions: 1024 × 576 px
+4 1. Robin882 commented 7 years ago
On a serious note, this is amazing!