on 2/27/01 2:56 AM, Dan Logan at [EMAIL PROTECTED] wrote:
>>> What's the DIY mix for diesel? I think it's something like 10 parts
>>> kerosene, 1 part engine oil...
>>
>> While we're off topic, and have the chemistry set out, how do you
>> make hydrogen peroxide (H2O2)? I just saw a weird little one-man
>> helicopter with no engine; just small jets on the ends of the rotors.
>> You hand-pump H2O2 up to the jets, which contain a silver/steel mesh,
>> where, apparently, H2O2 "explosively decomposes" into steam
>> and thrust, and with a loud hiss, off you go!
>
> Hydrogen peroxide is readily available and pretty cheap - up to 9% vol can
> be had from any chemist and many chemical supply companies will be happy to
> supply small quantities of higher concentrations altho they sometimes
> require a statement about what you're using it for...
>
> Dan.
>
Believe me, you DON'T want to be messing with H2O2 in high concentrations.
Think about why low concentration H2O2 makes a good disinfectant -- it
reacts violently when in contact with organic matter and other impurities
(bacteria, dead skin, live skin, etc.). In higher concentrations, well,
just say that there were a number of Germans that died nasty deaths in WWII
trying to use (I believe) 70% H2O2 to fuel rocketplanes and some miniscule
fleck of dust got in the process. (It's possible that these tales are
apocryphal, though, but they bring out the point nicely.) I don't know what
concentration this helo used, but you basically need to think of it as
hypergolic (self-igniting) rocket fuel. The silver mesh is just that...
silver or platinum, which acts as a catalyst to speed the breakdown of the
H2O2.
I wonder if you could rig a Duo to act as a controller on such an
aircraft??? (OK, so it was a feeble attempt to swing back on-topic. :-) )
- Eric.
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