What percentage of overall fuel does a rocket burn up to get to max-q?
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I know that max-q normally occurs around 11-15km (based on observations of watching falcon 9 launches and this). Furthermore, I know that the fuel usage for each rocket would vary a lot (which I assume is because of weight differences of different rockets). However, what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9? Furthermore, would the percentages of fuels for different rockets at max-q vary?
fuel max-q
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up vote
8
down vote
favorite
I know that max-q normally occurs around 11-15km (based on observations of watching falcon 9 launches and this). Furthermore, I know that the fuel usage for each rocket would vary a lot (which I assume is because of weight differences of different rockets). However, what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9? Furthermore, would the percentages of fuels for different rockets at max-q vary?
fuel max-q
add a comment |
up vote
8
down vote
favorite
up vote
8
down vote
favorite
I know that max-q normally occurs around 11-15km (based on observations of watching falcon 9 launches and this). Furthermore, I know that the fuel usage for each rocket would vary a lot (which I assume is because of weight differences of different rockets). However, what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9? Furthermore, would the percentages of fuels for different rockets at max-q vary?
fuel max-q
I know that max-q normally occurs around 11-15km (based on observations of watching falcon 9 launches and this). Furthermore, I know that the fuel usage for each rocket would vary a lot (which I assume is because of weight differences of different rockets). However, what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9? Furthermore, would the percentages of fuels for different rockets at max-q vary?
fuel max-q
fuel max-q
edited Nov 14 at 6:27
uhoh
32.3k16112399
32.3k16112399
asked Nov 14 at 5:59
Vivek
1539
1539
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1 Answer
1
active
oldest
votes
up vote
12
down vote
accepted
would the percentages of fuels for different rockets at max-q vary?
Yes, it will certainly vary with different rocket designs, and even for a given launcher with different payloads and trajectories.
what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9?
Flightclub.io's simulation of the CRS-15 Falcon 9 mission shows max Q at 66 seconds, with about 350 tons of first and second stage propellant remaining out of an initial quantity of 509 tons, so about 31% of fuel has been used.
Looking at a different rocket, Braeunig's simulation of Apollo 11 (archive.org link) gives max Q at 83.7 seconds into flight and 13.8km altitude, with 1,553,418 kg of propellant remaining from an initial 2,656,755 kg -- about 41.5% of total propellant used. Considering that the total fuel includes that required to go from LEO to the moon, the higher usage might seem surprising, but the upper stages of the Saturn V have much better specific impulse than the Falcon 9 second stage, and the first stage slightly poorer, so in the early part of flight it is expending fuel mass at a disproportionately steep rate.
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
12
down vote
accepted
would the percentages of fuels for different rockets at max-q vary?
Yes, it will certainly vary with different rocket designs, and even for a given launcher with different payloads and trajectories.
what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9?
Flightclub.io's simulation of the CRS-15 Falcon 9 mission shows max Q at 66 seconds, with about 350 tons of first and second stage propellant remaining out of an initial quantity of 509 tons, so about 31% of fuel has been used.
Looking at a different rocket, Braeunig's simulation of Apollo 11 (archive.org link) gives max Q at 83.7 seconds into flight and 13.8km altitude, with 1,553,418 kg of propellant remaining from an initial 2,656,755 kg -- about 41.5% of total propellant used. Considering that the total fuel includes that required to go from LEO to the moon, the higher usage might seem surprising, but the upper stages of the Saturn V have much better specific impulse than the Falcon 9 second stage, and the first stage slightly poorer, so in the early part of flight it is expending fuel mass at a disproportionately steep rate.
add a comment |
up vote
12
down vote
accepted
would the percentages of fuels for different rockets at max-q vary?
Yes, it will certainly vary with different rocket designs, and even for a given launcher with different payloads and trajectories.
what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9?
Flightclub.io's simulation of the CRS-15 Falcon 9 mission shows max Q at 66 seconds, with about 350 tons of first and second stage propellant remaining out of an initial quantity of 509 tons, so about 31% of fuel has been used.
Looking at a different rocket, Braeunig's simulation of Apollo 11 (archive.org link) gives max Q at 83.7 seconds into flight and 13.8km altitude, with 1,553,418 kg of propellant remaining from an initial 2,656,755 kg -- about 41.5% of total propellant used. Considering that the total fuel includes that required to go from LEO to the moon, the higher usage might seem surprising, but the upper stages of the Saturn V have much better specific impulse than the Falcon 9 second stage, and the first stage slightly poorer, so in the early part of flight it is expending fuel mass at a disproportionately steep rate.
add a comment |
up vote
12
down vote
accepted
up vote
12
down vote
accepted
would the percentages of fuels for different rockets at max-q vary?
Yes, it will certainly vary with different rocket designs, and even for a given launcher with different payloads and trajectories.
what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9?
Flightclub.io's simulation of the CRS-15 Falcon 9 mission shows max Q at 66 seconds, with about 350 tons of first and second stage propellant remaining out of an initial quantity of 509 tons, so about 31% of fuel has been used.
Looking at a different rocket, Braeunig's simulation of Apollo 11 (archive.org link) gives max Q at 83.7 seconds into flight and 13.8km altitude, with 1,553,418 kg of propellant remaining from an initial 2,656,755 kg -- about 41.5% of total propellant used. Considering that the total fuel includes that required to go from LEO to the moon, the higher usage might seem surprising, but the upper stages of the Saturn V have much better specific impulse than the Falcon 9 second stage, and the first stage slightly poorer, so in the early part of flight it is expending fuel mass at a disproportionately steep rate.
would the percentages of fuels for different rockets at max-q vary?
Yes, it will certainly vary with different rocket designs, and even for a given launcher with different payloads and trajectories.
what percentage of the overall fuel (fuel for both stages) is used up by max-q for a rocket like a falcon-9?
Flightclub.io's simulation of the CRS-15 Falcon 9 mission shows max Q at 66 seconds, with about 350 tons of first and second stage propellant remaining out of an initial quantity of 509 tons, so about 31% of fuel has been used.
Looking at a different rocket, Braeunig's simulation of Apollo 11 (archive.org link) gives max Q at 83.7 seconds into flight and 13.8km altitude, with 1,553,418 kg of propellant remaining from an initial 2,656,755 kg -- about 41.5% of total propellant used. Considering that the total fuel includes that required to go from LEO to the moon, the higher usage might seem surprising, but the upper stages of the Saturn V have much better specific impulse than the Falcon 9 second stage, and the first stage slightly poorer, so in the early part of flight it is expending fuel mass at a disproportionately steep rate.
edited Nov 14 at 6:51
answered Nov 14 at 6:37
Russell Borogove
76.6k2241330
76.6k2241330
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