[ERPS] unstabilized peroxide

[John Carmack]

We finally got a firm price quote for the unstabilized 50% peroxide from 
Air Liquide -- $0.95 / lb.  That is with the understanding that we are 
probably going to be buying quite a lot, but our first delivery is only 
four drums.  I am completely happy with that price for now, but we can 
probably get it down to half that when we start buying tank car loads 
directly from the manufacturer.

I would strongly urge anyone working on peroxide concentration to start 
with unstabilized semiconductor grade.  The past several years have clearly 
shown that making your own rocket grade peroxide with consistancy in usable 
quantities is not as easy as many people have assumed it to be.  Removing a 
significant aspect of the process is easily worth doubling the price of the 
feedstock.

Regarding the talk of catalysts in the ERPS update:  I am quite confident 
that the rolled foil catalysts we are using in our mixed monoprop engines 
will work with 98% peroxide just fine.

John Carmack

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