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Questions tagged [thrust-vectoring]

questions regarding an engine's capability to control the direction of its thrust.

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How common is the ability to compensate for a lost engine through gimbaling?

Discussing a system of regulating thrust through lighting/extinguishing engine pairs, I was met with a reply: Really there is no need to treat engines as a pair in this context. In fact, ...
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Optimal Thruster Layout For Cubesat

I am working on a simulation of a Cubesat for rendezvous. Using the Clohessy-Wiltshire equations I calculate delta-v. Now that I know the thrust needed for operation, I would like to know how to ...
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Have any vehicles used asymmetrically variable thrust for active stabilisation? [duplicate]

Have there been any tests or attempts at developing a propulsion system that uses variable thrust for attitude control (particularly during launch)? Conventional systems often use fully gimballed ...
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Non-axial thrust during Falcon 9 Block 5 launch? [duplicate]

Looking at video of the Block 5 launch today (2018 May 11) I noticed that from the ground tracking views, the vehicle roll axis and the exhaust plume appeared not to be collinear. When they cut to the ...
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Active thrust vectoring

I am new to this group, and so glad I found it. Rockets use thrust vectoring, fins or both for flight control. Lets say when SpaceX launches a Falcon 9, from liftoff until MECO, when is thrust ...
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Calculating spacecraft thrust manoeuvres with JPL data

I've recently programmed an animated simulation of the main elements (core planets and Sun) of our solar system: by using the initial coordinates from the JPL (Jet Propulsion Laboratory - NASA) ...
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Which engine failed during CRS-1?

During SpaceX's CRS-1 mission, "engine 1" failed, but the booster still completed its primary mission due to a plentiful thrust and fuel margin. Clearly, an outboard engine failure is more critical ...
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Falcon 9 Merlin engine thrust vectoring

One of the ways that the Falcon 9's attitude is controlled is through thrust vectoring of the main Merlin engine(s?). In images of older thrusters i've seen hydraulic or electric linear actuators to ...
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How to numerically solve an optimal thrust-vectoring problem?

This question is a follow-up to this question and is linked to this question, where if needed more details can be found on the parameters used in the following. For an in-plane non-impulsive orbital ...
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Retromotor thrust-vectoring strategy (boundary value problem)

EDIT October 15, 2017: the problem in this question is cast as an optimal control problem and reformulated here. The spacecraft I am designing is flying in an elliptical orbit (8 x 3000 km) around ...
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Do gimbaled engines have to be carefully test-fired to ensure the thrust axis intercepts center of rotation?

A smoothly running rocket engine will have a center of thrust axis. If the engine is gimbaled, that axis should pass through each of the gimbal axes (if it's a classical gimbal), or if it is a ball ...
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What kind of forces and response times/accelerations are needed to gimbal a mid-sized nine-engine rocket's engines?

This answer explains that the gimbaling actuators on each of the nine Rutherford engines on the Electron rocket are in fact electrically powered DC brushless motors. Currently it's not known if they ...
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SpaceX Engine Mounting / Gimbaling

Inspired by the discussion on What are the two very large "blue" cylinders attaching to the combustion chamber of each Rutherford Engine? and especially jkavalik's excellent picture of the ...
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What are the two very large “blue” cylinders attaching to the combustion chamber of each Rutherford Engine?

The NASA Spaceflight article Rocket Lab’s Electron rocket set for inaugural flight from New Zealand mentions the upcoming opening of a 10 day launch window: Rocket Lab, a U.S.-based launch service ...
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Is it pretty much a given that all deep-space spacecraft have gimbaled engines?

I'm starting to see a pattern. Both this answer about Cassini liquid propellant engine and this answer about ion thrusters discuss a particular necessity for gimbaling engines to keep thrust aligned ...
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Thrust vectoring for ion propulsion - any plans or current research?

While most applications of ion thrust involves long "burns" with either a tiny, slow rotation or none, in the case of this question: Thrust strategy to circularize a standard GTO orbit using ion ...
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Is it unusual to vector the thrust from an SRB?

Let me explain. The term SRB (Solid (fuel) Rocket Booster) usually refers to a solid (fuel) rocket which is attached to something else in order to "boost" it. But I just read this answer by @...