Can KNO3 and bentonite clay increase rocket engine performance?

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Discussion Overview

The discussion centers around the potential effects of using KNO3 fuel and bentonite clay in rocket engines, specifically regarding the impact on specific impulse (ISP) and the role of radiation. Participants explore the theoretical implications of these materials in rocket performance, touching on concepts related to radiation and its effects.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • One participant suggests that using KNO3 fuel and bentonite clay for the nozzle could slightly increase the ISP of the engine due to radiation effects, comparing it to the operation of a NERVA engine.
  • Another participant questions the existence of radiation in this context, seeking clarification on what radiation is being referred to.
  • A claim is made that bentonite clay contains compounds of uranium or thorium, which could imply some level of radioactivity.
  • One participant expresses skepticism about bentonite being radioactive on its own, noting its use in absorbing radioactive elements.
  • A comparison is drawn between the presence of uranium in a uranium mine and the use of bentonite in rocket engines, suggesting that the two should not be conflated.
  • It is mentioned that bentonite clay contributes to slight radioactivity in products like cat litter.
  • A participant points out that background radiation is a common phenomenon and that natural bentonite may contain K-40, which is a naturally occurring radioactive isotope.

Areas of Agreement / Disagreement

Participants express differing views on the radioactivity of bentonite clay and its implications for rocket engine performance. There is no consensus on the significance of radiation in this context, and the discussion remains unresolved regarding the effects of these materials on ISP.

Contextual Notes

Participants reference various aspects of radioactivity and its sources, but the discussion lacks clarity on the specific mechanisms by which radiation might influence rocket performance. The assumptions regarding the radioactivity of bentonite and its compounds are not fully explored.

novamarine
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Question,

If I make a rocket engine using KNO3 fuel and bentonite clay for the nozzle, shouldn't the ISP of the engine be slightly higher due to the radiation?
It would be nearly Immeasurable but nevertheless there.

Kind of like the way a NERVA engine works.
 
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What radiation?
 
Bentonite clay has compounds of uranium or thorium in it.
 
I have heard it can be used to absorb some radioactive elements, but I have never heard about bentonite to be radioactive on its own.
 
You've got all kinds of uranium in a uranium mine, but a uranium mine has never been mistaken for a solid rocket.
 
It's what makes cat litter slightly radioactive.
 
Have you ever heard about background radiation? Everything is to some extent radioactive, including bananas and water we drink. If natural bentonite is radioactive, it is most likely because of the presence of K-40, not thorium or uranium.
 

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