EVBEC, a combustion "simulation" spreadsheet

[jimmy101]

EVBEC is pretty good. If your gun is similar to the guns it uses for standards then the EVBEC prediction is probably more accurate than actually measuring the performance of the gun. (EVBEC doesn't have the ~10% shot-to-shot reproducibility problems that real guns have.)

If your gun is significantly different than the standard guns then it is hard to say how accurate EVEBEC will be. A very skinny chamber, large number of sparks, butane instead of propane fuel, squirt-and-screw instead of a meter, firing anything other than a spud or a gasket round ... the results will be off by more than with a standard configuration. I would expect though that most of the trends predicted by EVEBC would still be pretty close.

[Gepard]

Ok Thanks Guys,

Michael

[Modderxtrordanare]

What an informative post.


But, I would love to be able to use this program to model my new hybrid, but I don't have Excel. I know of a free spreadsheet reader program I might be able to use, but I forgot where to get it.

[Gepard]

FreeOffice

Michael

[boilingleadbath]

Alternatively, I've written an online version of this program. It runs in your web browser, so you don't have to have a spreadsheet program.

http://www.spudfiles.com/EVBEC/JSE.html

It's pretty much the same thing, but only uses the 3/4" data (which I felt was the best and most complete) instead of all the test data collected by the Latke group.

[boilingleadbath]

Much thanks to Chris Keiser for a user-interface upgrade for the spreadsheet version of EVBEC.

I suppose EVBECsheet is nice in that it allows you to save your cannon configuration, so EVBEC V1.6 does have a target audience.