Drag becomes a major player as vehicle size/diameter goes down so you want
the dentists propellants possible,
A person could pick up a a 55 gal drum of LH2 which weighs <30Lbs almost as
heavy as the drum its self.
On Mon, Jan 13, 2020 at 10:04 PM Paul Breed <paul@xxxxxxxxxx> wrote:
Look up the short simple paper how small can a launcher be... where it
explicitly model different porpellant density combinations...
How small can a launch vehicle be. Whitehead, AIAA joint propulsion
conference !0 July 2005.
Liquid hydrogen has the mass density of a cardboard box full of empty
Styrofoam cups...
One would need to be close to delusional to choose hydrogen for a small
launcher.
On Mon, Jan 13, 2020 at 9:01 PM Craig Fink <webegood@xxxxxxxxx> wrote:
I think you should reconsider, Hydrogen Propellants are way more fun.
On Mon, Jan 13, 2020 at 8:33 PM Paul Breed <paul@xxxxxxxxxx> wrote:
I've spent the last month updating my shop and working to clean it up to
be functional for a rocket project.
I'm almost read to start cutting metal for all hte things I've been
sketching and doodling for the last (n-years)
Last January/Febuary I made a bunch of parts and then got involved with
other things...
I'm hoping to make this streak a bit longer 9 or 12 months.
Long enough to actually fly a single tube of my otrag design.
Now a beg for help...
I use RPA as my engine design tool.
I'm 100% comfortable working with that, as long as all the chemicals I
want to use are in the database...
... but I generally suck as a chemist.
I have a new fuel I'm using on this project that is a salt dissolved in
a solvent.
I want to make sure the mixture I'm actually burining is what I'm
modeling in RPA.
Is there any one that can help me with this?
Please DM me and I'll discuss.
I'd prefer it be a U.S. person if possible (ITAR sucks)
^Thanks!
Paul
AKA Unreasonable Rocket
--
Craig Fink
WeBeGood@xxxxxxxxx