Some questions on the planned ERPS valves and also the KZCO valves.
John,
Could you point me to the site for the KZCO valves if there is one. What
model are you using? Are there drawings?
Pierce
Any front runners you might have a URL for? I don't know the material
being used for the valves. I left it out of my drawing as I just didn't know
H2O2 compatibility issues that well. I was thinking 316 SS when I drew it. As
I remember alloy aluminum is not usable, is this correct? Also what presure
will POGO be using (ball park) to pressurize the tanks?
Would ice formation ever be a problem on the main throttle valve?
Pierce Nichols wrote:
> The current valve plan is to use standard manual ball valves
> driven by stepper or servo motors. These achieve acceptably fast control
> without the massive continuos current draw of a solenoid valve.
>
> -p
>
> At 02:00 PM 10/2/02 -0400, Alex Fraser wrote:
> > I am not manufacturing this valve. I put it on list as I think the
> >idea is worth considering. Adapting off the shelf valves to rocketry is
> >convenient and speeds production of working machines. This is good, but
> >I wonder if what the limits of this methodology are. It's like a "L"
> >head piston engine compared to a modern overhead cam design (Briggs and
> >Stratton versus Honda).
> > Balls and seats are not easy to make. I would think finding a
> >suitable off the shelf valve that you could strip the components out of
> >and mount in a new valve body/engine would be the way to go.
> > Armadillo's main engine on the Spider Man Mover, IIRC sucks down 30
> >amps on the main valve and I'm not sure at all what the attitude engines
> >use. There will be a point in scaling things up where off the shelf
> >electrically actuated valves just won't do for rocketry. I am thinking
> >about this, I left the motive force out of the drawing as I just don't
> >know how yet.
> > Development time allotted to a large light throttable valve will be
> >of NO use to KISS or any of the next couple of generations of ERPS
> >machines, but there will come a time when you will have to make the
> >change and spend the time. A good start would be to make detailed
> >drawings of your current OTS valves (if you don't already have them) and
> >start building a drawing library.
> >
> >Bill Clawson wrote:
> >
> > > Looked at the drawing using Turbo CAD 4.0 -- or
> > > whatever the free distribution is called. Are you
> > > considering custom manufacturing said ball valve on
> > > top of the engine's head?
> > >
> > > --- Alex Fraser <[EMAIL PROTECTED]> wrote:
> > > > Build the valve into the rocket engine body.
> > > > I was thinking about this design for a while,
> > > > thought I'd sketch it out.
> > > > Drawing attached.
> > > > The recent postings on emergency shut down made
> > > > me regurgitate the
> > > > idea. The idea was originally to save weight and
> > > > space, but it occurred
> > > > to me that if there was no plumbing after the valve
> > > > that purging would
> > > > be easier, as there would be no pipe to contaminate.
> > > > I have omitted the
> > > > nozzle and cat pack. This valve would be for H2O2.
> > > > I'm cogitating on an
> > > > integral fuel valve. I think the H2O2 would cool
> > > > this valve enough not
> > > > to melt the seal while it was open, when closed I
> > > > wonder if the heat
> > > > built up during the burn wouldn't burn the seals on
> > > > the ball valve
> > > > (omitted in drawing).
> > > >
> > > >
> > > > --
> > > > >>>>>>>>>>>>>>>>----<<<<<<<<<<<<<<<<<
> > > > ........ Alex Fraser N3DER .........
> > > > ......... [EMAIL PROTECTED] .......
> > > > [~]_>^</\-[~]_>^</\-[~]_>^</\-[~]_>^<
> > > >
> > > >
> > >
> > > > ATTACHMENT part 2 application/x-zip-compressed
> > > name=bonnet_12.ZIP
> > >
> > > __________________________________________________
> > > Do you Yahoo!?
> > > New DSL Internet Access from SBC & Yahoo!
> > > http://sbc.yahoo.com
> > > _______________________________________________
> > > ERPS-list mailing list
> > > [EMAIL PROTECTED]
> > > http://lists.erps.org/mailman/listinfo/erps-list
> >
> >--
> > >>>>>>>>>>>>>>>>----<<<<<<<<<<<<<<<<<
> >........ Alex Fraser N3DER .........
> >......... [EMAIL PROTECTED] .......
> >[~]_>^</\-[~]_>^</\-[~]_>^</\-[~]_>^<
> >
> >
> >_______________________________________________
> >ERPS-list mailing list
> >[EMAIL PROTECTED]
> >http://lists.erps.org/mailman/listinfo/erps-list
--
>>>>>>>>>>>>>>>>----<<<<<<<<<<<<<<<<<
........ Alex Fraser N3DER .........
......... [EMAIL PROTECTED] .......
[~]_>^</\-[~]_>^</\-[~]_>^</\-[~]_>^<
_______________________________________________
ERPS-list mailing list
[EMAIL PROTECTED]
http://lists.erps.org/mailman/listinfo/erps-list
