[AR] Re: RP-1 versus ethanol for a student rocket?
- From: Norman Yarvin <yarvin@xxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Thu, 15 Oct 2020 12:58:05 -0400
On Thu, Oct 15, 2020 at 03:34:23PM -0000, Michael Kelly wrote:
If you do get around to testing peanut oil, please post it. I've
thought that would be an ideal propellant for years, given its
thermal stability (smoke point 450 F) and high density compared to
petroleum fuels.
The smoke point tells you where enough of it evaporates to produce a
visible smoke. We're interested what it takes to make the oil
polymerize and clog cooling passages, and that's mostly a matter of
how many double bonds it has. The USDA numbers are: 17.7% saturated,
48.3% monounsaturated, 33.4% polyunsaturated. That isn't promising.
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