The Atlas V maintains stable flight despite asymmetric solid rocket boosters using thrust vector control.
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the evidence backs this
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the weight of evidence
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Retrieved evidence confirms that the Atlas V uses asymmetric solid rocket booster arrangements with canted nozzles and utilizes thrust vector control on its main engine chambers to maintain stable flight.
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Launch Services Program
Launch Services Program Rockets
United Launch Alliance
Atlas V
Atlas V uses a standard common core booster, up to five solid rocket boosters (SRBs), a Centaur upper stage in a single- or dual-engine configuration, and one of several sizes of payload fairings. Atlas V is on NASA's Launch Services II contract.
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Its motors blazing, the United Launch Alliance Atlas V-551 launch vehicle carrying NASA’s Juno planetary probe is off to a roaring start on its five-year journey to Jupiter from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. NASA
Rocket Lab
Electron
Rocket Lab's Electron is the only reusable orbital-class small rocket. Capturing and reflying Electron’s first stage enables higher launch frequency without expanding production and lowers launch costs.
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A wet dress rehearsal is underway for Rocket Lab’s Electron rocket at Launch Complex 1 in Mahia, New Zealand on April 28, 2023. NASA’s Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats (TROPICS) CubeSats are secured in the payload fairing atop the rocket. Rocket Lab
SpaceX
Falcon 9
Falcon 9 is a reusable, two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of people and payloads into Earth orbit and beyond. Falcon 9 is the world’s first orbital class reusable rocket. Reusability allows SpaceX to refly the mos
# How does Atlas V maintain stable flight with asymmetric solid rocket boosters?
Tags: design, booster, atlas-v
- Score: 13
- Views: 4170
- Answers: 3
- Answered: yes
- Asked by: Frank (837 rep)
- Asked: 2016-10-10
- Edited: 2018-01-24
- Site: space
## Question
While watching a launch of an Atlas V, I couldn't help but notice that the boosters were positioned asymmetrically. There was one booster on one side of the rocket, and two boosters on the other side.
Further research revealed that the positioning for the booster was intentional. Which is odd, because off-setting the boosters will give more thrust to one side of the rocket, and in turn, end in a disaster!
But that didn't happen during the launch. The rocket managed to fly perfectly upwards! How did they manage to do that? Why did they even position the boosters that way! Does it hold some sort of benefit? And if so, why don't people use that more and more often?
## Answers
### Answer by Russell Borogove (score: 13 [ACCEPTED])
The nozzles of the SRBs are canted outward, so the line of thrust from each SRB passes close to the center of mass of the rocket, so that the net torque from asymmetrical booster arrangements i
# How does an Atlas V control roll?
Tags: guidance, gimbaled-engines
- Score: 4
- Views: 823
- Answers: 1
- Answered: yes
- Asked by: Greg (4297 rep)
- Asked: 2020-02-15
- Edited: 2020-02-15
- Site: space
## Question
My understanding is that you want to control roll in a rocket, along with the other directions. An Atlas V has a single RD-180 engine but I didn't see anything about vernier engines. I guess the RD-180 has two combustion chambers and two nozzles, and if those nozzles can gimbal independently that would do it--point them in different directions and the rocket will roll. I suppose that must be the case, otherwise they'll be a little misaligned and you couldn't control it. But I couldn't find anything that explicitly states that.
## Answers
### Answer by Organic Marble (score: 7)
The RD-180 can gimbal each thrust chamber independently, allowing for roll control.
Each Chamber assembly is gimballed in two planes for thrust
vector control. This feature is implemented through the
innovative construction of the gimballing unit on each hot
oxygen gasline. Strains developed by the actuator for chamber
gimballing are confined structurally to the engine elements.
Everything we examined (3) — 2 independent sources
This check searched the claim as stated. It did not run a separate search for evidence against it.