[BProckets] NC chemistry help requested.

[flint hapirat]

Hi all, 
As you know, or not, I'm working (among lot's of other
projects) on tubelesses.
These are little grains of BP that fly on their own,
with a pasta rod as stabilizer (don't let the wife git
you while rubbing her pasta!!! and wash your hands -
before you take the pasta!!!). 

The flight is nice and I can see the upscalling
soon... 
The motors are 10mm ID, 3cm long, 2cm long 2mm ID
core. They dry fast and working with them is pretty
easy. 
I have tested all the binders that I have (except for
guar gum - which I just recently got)
Dextrin and starch (potato starch, food grade), corn
starch - all work well. The flight with these binders
is slightly slow but very consistent. No worries - we
can always ram a longer core... Wheat flour and other
binders don't work as well, but I won't list these
(very long).
Here is my problem - 
I tried using NC at a concentration of 1ppb in 100cc
acetone (ping pong balls = ppb). Adding 3ml of NC
laqour to 10gr of BP does the trick and
casting/ramming is easy.
It's even easier to work with, and the flight is WAY
WAY better!!! A VERY rapid liftoff and flight. Very
impressive. Far superior to the rest of the binders
(no surprise though). 
 BUT - 
Out of 3 motors 2 will fly like a bat from hell, but
the last one will cato (crossette like!).
I'm assuming the problem lies in cavities left by the
evaporating acetone, even tough I'm ramming the stuff.

How can I slow the acetone evaporation down??? 
Will some ethanol added to the acetone help?
[I'll try higher NC concentration soon]

Note - 
if you wanted to say "MEK" - don't bother: I don't
have any and can't get it anyway, not even standing on
my head... 

Thanks guys,
Flint


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