Can Unlimited Energy Launch Objects into Orbit Using Accelerator Technology?

Click For Summary

Discussion Overview

The discussion revolves around the theoretical concept of using an unlimited energy source to launch objects into low Earth orbit (LEO) through accelerator technology, similar to the methods used in particle accelerators. Participants explore various aspects of this idea, including trajectory efficiency, the feasibility of achieving escape velocity, and the implications of infinite energy on launch systems.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions the efficiency of launching an object perpendicular to the Earth's surface versus at an angle, seeking to understand the minimum speed required for LEO.
  • Another participant asserts that without achieving escape velocity, any object exiting the atmosphere will return to Earth, challenging the notion of unassisted LEO.
  • A participant introduces the concept of a "space gun," noting that without additional propulsion, the object would either fall back or continue indefinitely.
  • Concerns are raised about the high temperatures experienced during atmospheric passage, which could destroy the object if it reaches escape velocity too early.
  • Some participants express skepticism about the practicality of using infinite energy for launches, suggesting that traditional methods have proven effective for decades.
  • There is a discussion about the terminology of "infinite energy," with some participants advocating for clearer language regarding energy and power in scientific discussions.
  • One participant proposes that if infinite energy were available, it could be used to create a space elevator, emphasizing a more leisurely and safe ascent to orbit.
  • Another idea involves using infinite energy to compress the Earth's atmosphere for launching crafts, eliminating air resistance concerns.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the feasibility of launching objects into orbit using infinite energy. There are multiple competing views regarding the implications of such energy on launch methods, the definitions of energy, and the practicality of the concepts discussed.

Contextual Notes

Participants express limitations in the discussion, particularly regarding the assumptions of "infinite energy" and its implications for real-world applications. There are unresolved questions about the efficiency of various launch methods and the technical challenges involved in atmospheric passage.

  • #31
sophiecentaur said:
Seriously not the best way to start thinking about a launch system. We don't have any energy (money) to spare for that sort of exercise.
Isn't that why it was specified - so the first answer isn't "can't be done, energy/money"?
 
Physics news on Phys.org
  • #32
OutOfTheBox said:
Summary:: Trying to understand the factors of a launch concept

If an infinite amount of energy were available to create the lift mechanism for a space launch. What would be required to fire a 200lb object into low Earth orbit(160km) after speeding it up in a way similar to how the large hadron collider speeds up a particle.

Assuming the launch vehicle would:
A. Use technology x to protect its cargo from the effects of the G-force's it would be exposed to
B. Have a drag coefficient of 0.04
C. Have no additional propulsion after launch
D. Launch at sea level

The first questions I am looking to understand include:
1. Trajectory wise, is it more efficient to launch the object perpendicular to the Earth's surface like a rocket or at an angle like a ramp?
2. what is the minimum speed the object needs to be going when it leaves the Earth's surface to reach low Earth orbit unassisted?
This concept has been explored in detail not for Earth launch because of the atmosphere, but for lunar launch of material for building large space structures. Not a space gun but an electromagnetic launcher called a Mass Driver. In that case high gee forces are not an issue because humans are not being launched and there are no drag forces. Physicist Gerard K. O'Neill developed the concept in the 1970's to support his vision of building large space colonies. It is interesting that his background was accelerator physics. Solar energy can be used which qualifies as unlimited.

https://en.wikipedia.org/wiki/Mass_driver#:~:text=A mass driver or electromagnetic,by electricity to make electromagnets.
 
Last edited:
  • Like
Likes   Reactions: anorlunda
  • #33
bob012345 said:
This concept has been explored in detail not for Earth launch because of the atmosphere, but for lunar launch of material for building large space structures. Not a space gun but an electromagnetic launcher called a Mass Driver. In that case high gee forces are not an issue because humans are not being launched and there are no drag forces. Physicist Gerard K. O'Neill developed the concept in the 1970's to support his vision of building large space colonies. It is interesting that his background was accelerator physics. Solar energy can be used which qualifies as unlimited.

https://en.wikipedia.org/wiki/Mass_driver#:~:text=A mass driver or electromagnetic,by electricity to make electromagnets.
Thank you.
 
  • Like
Likes   Reactions: bob012345

Similar threads

  • · Replies 28 ·
Replies
28
Views
6K
  • · Replies 98 ·
4
Replies
98
Views
8K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 56 ·
2
Replies
56
Views
7K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 85 ·
3
Replies
85
Views
9K
  • · Replies 37 ·
2
Replies
37
Views
6K
  • · Replies 5 ·
Replies
5
Views
12K