Reverse Mass Drivers: Catching Surfaces Grazing Orbiting Spacecraft

• Oct 23, 2021

• #1

DrHan

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If a mass driver could theoretically launch a vehicle then surely it could catch one too. Anyone know about articles related to mass drivers that refer to catching surfaces grazing orbiting spacecraft ?

 

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• Oct 23, 2021

• #2

berkeman

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Welcome to PF.

There's at least one fundamental difference between launching a high-speed object ahd catching one. Can you speak to that difference?

 

• Oct 23, 2021

• #3

Vanadium 50

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Is this related to why "the javelin catch" is not an olympic sport?

 

• Oct 23, 2021

• #4

Bystander

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DrHan said:

Anyone know about articles related to mass drivers that refer to catching surfaces grazing orbiting spacecraft ?

Are you familiar with the Ringworld braking system?

 

• Oct 24, 2021

• #5

Melbourne Guy

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DrHan said:

If a mass driver could theoretically launch a vehicle then surely it could catch one too.

That's SpaceX's next secret innovation. Elon was one his way home one evening, just daydreaming as Fully Autonomous Most Famous Level 7 Autopilot mode carried him along, and as the regenerative braking slowed his Model Z, he suddenly thought, "Hold on a minute..."

Seriously, I guess it could be done, theoretically, but it seems a dangerous game to play because any mishap is likely to demolish your expensive mass driver and probably the facility that powers it. And you just know there's going to be a mishap

 

1. What is a reverse mass driver?

A reverse mass driver is a propulsion system that uses electromagnetic forces to accelerate a spacecraft by pushing against a magnetic field. This is in contrast to traditional mass drivers, which use magnetic forces to accelerate a projectile away from the spacecraft.

2. How does a reverse mass driver work?

A reverse mass driver works by using a series of coils to create a magnetic field that interacts with a spacecraft's electrically charged components. This creates a force that propels the spacecraft forward. The strength and direction of the magnetic field can be controlled to adjust the speed and direction of the spacecraft.

3. What are the advantages of using a reverse mass driver?

One of the main advantages of using a reverse mass driver is its efficiency. It can provide a constant acceleration without the need for any propellant, making it a more sustainable option for long-distance space travel. Additionally, the lack of moving parts reduces the risk of mechanical failure.

4. Can a reverse mass driver be used to catch or dock with other spacecraft?

Yes, a reverse mass driver can be used to catch or dock with other spacecraft. By adjusting the strength and direction of the magnetic field, a reverse mass driver can be used to slow down and match the speed of an orbiting spacecraft, allowing for a controlled docking or rendezvous.

5. Are there any potential challenges or limitations to using reverse mass drivers?

One potential challenge of using reverse mass drivers is the precision and control needed to accurately maneuver a spacecraft. The magnetic field must be carefully calibrated to avoid damaging the spacecraft or causing it to veer off course. Additionally, the power requirements for a reverse mass driver may be significant and could limit its use for smaller spacecraft.