Measuring Thrust of Hall Effect Thruster - Advice Needed

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Discussion Overview

The discussion centers around methods for measuring the thrust produced by a Hall Effect Thruster. Participants explore practical approaches to obtain accurate thrust measurements, considering the challenges posed by the thruster's characteristics and the sensitivity required for measurement.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests using a sensitive balance scale, either mechanical or electronic, to measure the thrust directly.
  • Another participant raises concerns about the potential impact of the strong magnetic field on digital scales, questioning their accuracy when placed near the thruster.
  • A later reply proposes that a non-magnetic mechanical scale could be a viable alternative, noting that the thrust is relatively small and comparable to the weight of a US quarter.

Areas of Agreement / Disagreement

Participants generally agree on the need for sensitivity in measurement but express differing views on the suitability of digital versus mechanical scales due to concerns about magnetic interference.

Contextual Notes

Participants do not resolve the issue of whether digital scales can be used safely, nor do they clarify the specific sensitivity requirements for the measurement setup.

Who May Find This Useful

Individuals interested in experimental methods for measuring thrust in propulsion systems, particularly those working with Hall Effect Thrusters or similar technologies.

stuart757
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hi i am in a bit of a pickle and could do with some advice.

i have a built, working, hall effect thruster (http://en.wikipedia.org/wiki/Hall_effect_thruster) but can't figure out how to measure the thrust it produces. any ideas?

thanks

stuart
 
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Why not just put it upside down on a sensitive balance scale(mechanical or electronic) and measure from there.
Remember, the thrust IS small, so the scale will have to very sensitive.
 
pallidin said:
Why not just put it upside down on a sensitive balance scale(mechanical or electronic) and measure from there.
Remember, the thrust IS small, so the scale will have to very sensitive.
I'm guessung that would eb a problem. For that kind of sensitivity, you'd need a digital scale, wouldn't you? I don't know if it's wise to put a digital instrument that close to such a strong magnet. Won't it wreck the thing? Or at the least, throw off its accuracy?
 
You do bring up a good point. A digital scale could be adversely affected.
However, a sensitive non-magnetic mechanical scale should suffice, as the thrust is on the order of comparison to the weight of a US quarter; easily handled by mechanical balance scales.
 

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