Anyone have updated info on this?

http://www.space.com/missionlaunches...gin-stern.html

Pat

"Pat Flannery" wrote in message
dakotatelephone...
http://www.space.com/missionlaunches...gin-stern.html

Pat

The secrecy makes Bezos sound too much like Jim Jones to me. If it's for
commercial use, they need (NEED) to be much more open.

"Alan Erskine" wrote in
:

"Pat Flannery" wrote in message
dakotatelephone...
http://www.space.com/missionlaunches...gin-stern.html

Pat

The secrecy makes Bezos sound too much like Jim Jones to me. If it's
for commercial use, they need (NEED) to be much more open.


I live less than ten miles from them and they seldom make the news,
let alone substantial details. What little has come out recently
seems to suggest they've made additional flights, but probably
not with the vehicle that'll have a serious propulsion system
(something more than peroxide alone for propellent). Not a clue on
their propulsion systems development status that I've heard of.

Frustrating...


--Damon

On Dec 23, 10:27*am, Damon Hill wrote:
"Alan Erskine" wrote :

"Pat Flannery" wrote in message
hdakotatelephone...
http://www.space.com/missionlaunches...gin-stern.html

Pat

The secrecy makes Bezos sound too much like Jim Jones to me. *If it's
for commercial use, they need (NEED) to be much more open.

I live less than ten miles from them and they seldom make the news,
let alone substantial details. *What little has come out recently
seems to suggest they've made additional flights, but probably
not with the vehicle that'll have a serious propulsion system
(something more than peroxide alone for propellent). *Not a clue on
their propulsion systems development status that I've heard of.

Frustrating...

--Damon

h2o2+synfuel is by far the best fly-by-rocket via liquid fuel
density. Nothing else comes close to accomplishing the most payload
to LEO per liquid kg.

Because h2o2+synfuel is so powerful is also why it's compact and
otherwise extremely touchy stuff, although relatively safe in the
chilled format.

~ BG

Damon Hill wrote:

I live less than ten miles from them and they seldom make the news,
let alone substantial details. What little has come out recently
seems to suggest they've made additional flights, but probably
not with the vehicle that'll have a serious propulsion system
(something more than peroxide alone for propellent). Not a clue on
their propulsion systems development status that I've heard of.

Frustrating...


They are going to have a hard time getting the performance they want
with simple H2O2 decomposition and no fuel burning with the released oxygen.
You would think they would add either alcohol or kerosene to the mix;
the latter is quite a good propellant combo, as Black Arrow showed.

Pat

"Pat Flannery" wrote in message
lephone...


Damon Hill wrote:

I live less than ten miles from them and they seldom make the news,
let alone substantial details. What little has come out recently
seems to suggest they've made additional flights, but probably not with
the vehicle that'll have a serious propulsion system
(something more than peroxide alone for propellent). Not a clue on
their propulsion systems development status that I've heard of.

Frustrating...


They are going to have a hard time getting the performance they want with
simple H2O2 decomposition and no fuel burning with the released oxygen.
You would think they would add either alcohol or kerosene to the mix; the
latter is quite a good propellant combo, as Black Arrow showed.


It's a two stage burn then? With H2O2 and platinum and the resulting O2 and
kerosine burning?

Legato wrote:
It's a two stage burn then? With H2O2 and platinum and the resulting O2 and
kerosine burning?


Yeah, or whatever other fuel you want to use.
This all got started by a German scientist named Dr. Hellmuth Walter
before WW II; he got very enthused by what you could do with hydrogen
peroxide to power things: http://en.wikipedia.org/wiki/Hellmuth_Walter
He started with simple engines that just decomposed H202 into oxygen and
superheated steam, then moved on to ones that added fuel to the hot
oxygen-rich exhaust to burn and create more thrust.
There's a detailed and illustrated overview of his rocket work he
http://www.walter-rockets.i12.com/
After the war, the British were very taken with the technology and used
to to power several rocket and missile designs including the Black Arrow
space launcher and Blue Steel cruise missile.
The turbopump on the V-2 missile was powered by steam generated by
decomposing H2O2, and the present day Russian Soyuz booster still uses
that means to drive the turbopumps in its core stage and four strap-on
boosters.
Although decomposition of H2O2 into steam and oxygen is simple to do for
rocket propulsion, it's very limited in its specific impulse unless you
then add fuel to burn with the hot oxygen, so you would end up with a
very large rocket with very limited abilities if you tried to power it
with just H2O2.
One of the advantages you get if you mix fuel with the steam is that the
steam is hot enough to ignite the fuel on contact.
In the Me-163 rocket fighter engine, the two propellants were hypergolic
and would ignite on contact even at room temperature.
http://en.wikipedia.org/wiki/T-Stoff
http://en.wikipedia.org/wiki/C-Stoff

Pat