Hi all,
I used to be fascinated by this stuff when I was a kid and
used to do a lot of pyro with building solid fuel model rockets.
My friends and I would mix the materials on the kitchen stove
and pour the molten fuel into cardboard tubes to harden around
an cone shape at the bottom of the tube.
Once electronically launched on our pad they would shoot
up maybe a few hundred feet. That ended abruptly
when I smoke bombed my mothers kitchen once accidently when mixing
the ingredients!!
So, I had done a lot of reading on rockets, ram jets, scram jets, v1, v2,"s
etc. Really fun stuff. If memory serves me correctly, Hitler used
liquid paraffin and kerosene in the v2's. They were only designed to run
for several minutes in flight. His scientists had also tried
liquid parrafin and alcohol.
One of the problems with these types of systems is that they used an incredable
amount of fuel to operate for any length of time.
Many air tools operate on an air turbine or piston design. You only need around
90psi
to start doing some worth while work and it wouldn't be too hard to generate
with wind
or solar. I have operated a model air motor on compressed air for about 20
minutes
with one of those tanks for tire fill ups @40 psi.
Sizing up such a system might be very interesting.
I have often though about a home system of wind /solar generated compressed air
for use to run a turbine when there is no sun or wind. I have to do a lot more
work on
the cost effectiveness of such a design and component sourcing for a prototype
but it is definately not that far fetched, unless I, or
someone else convinces me otherwise.
regards
tallex
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-------Original Message-------
> From: Manzo, Emil <[EMAIL PROTECTED]>
> Subject: Re: [Biofuel] Cross Posted: Fwd: [DIYGasTurbines] Re: I'd like to
> try something...but first, your opinions (please).
> Sent: 01 Sep '05 18:51
>
> Hi Doug. 400 mph...oops...just a minor detail. Of course you're right.
> The SCRAM jet is the super-sonic version (supersonic combustion ram
> jet). I think the old German V1 (buzz-bomb) used a variation on the
> pulse jet that had a front-flap, allowing starting from a standing stop
> using only the turbine. It was quite advanced for the time. My vehicle
> will not be approaching 400mph any time soon...did I say hairbrained?
>
> Regards,
> Emil
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> [EMAIL PROTECTED]
> Sent: Thursday, September 01, 2005 1:02 PM
> To: Biofuel@sustainablelists.org
> Subject: Re: [Biofuel] Cross Posted: Fwd: [DIYGasTurbines] Re: I'd like
> to try something...but first, your opinions (please).
>
> I seem to recall that the minimum airspeed for halfway reasonable
> efficiency with a ramjet is about 400 mph. Hiller once experimented with
> a small helicopter powered by ramjets on the rotor tips. I don't recall
> any mention of starting problems but I doubt it was easy.
>
> I believe that a fuel adaptable to forming a reasonably fine mist is
> needed for ramjets and gas turbines. Kerosene works and I believe the
> Germans used diesel fuel during the war.
>
> Doug Woodard
> St. Catharines, Ontario, Canada
>
> On Thu, 1 Sep 2005, Manzo, Emil wrote:
>
> > Hi Joe, for no (very few) moving parts you need a ram-jet. Or as some
> > used to call a "scram jet". It is essentially a pipe with a venturi
> and
> > a fuel injector. It needs to have air flowing through it before
> > ignition, like if it was attached to a glider or vehicle. Once enough
> > airspeed flows, the injector is activated and the fuel ignited
> producing
> > thrust. I bet WVO would work for fuel :-). Another one of my
> > hair-brained dreams....
> >
> >
> >
> > Regards,
> >
> > Emil
> >
> > -----Original Message-----
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