Lars,
I can't really say much more about them than they have on their website (
http://www.ursamajortechnologies.com/), but they seem to think making a
turbopump in that scale is doable. They have many of the former core
personnel from Blue Origin's BE-3 engine on their team now at Ursa Major,
so I'm giving them the benefit of the doubt that they know what they're
talking about. But yeah, making a staged combustion engine that size isn't
a trivial engineering task.
~Jon
On Tue, Aug 9, 2016 at 2:24 PM, Lars Osborne <lars.osborne@xxxxxxxxx> wrote:
And Ursa Major Technologies is working on a 5klbf LOX/Kero stagedcombustion engine that may also provide another data point once they get it
firing.
Wow. Stage combustion sounds very challenging to scale down.
Does this also mean they are using small scale turbopumps and turbines?
Perhaps they are taking some new approach? Maybe they are determined to
prove Doug Jones et. al incorrect that "small scale turbines are an
exercise in watch-making".
Thanks,
Lars Osborne
On Tue, Aug 9, 2016 at 10:11 AM, Paul Breed <paul@xxxxxxxxxx> wrote:
The LR-40
http://hydrogen-peroxide.us/history-US-General-Kinetics/AIAA
-2001-3838_History_of_RMI_Super_Performance_90_Percent_H2O2-
Kerosene_LR-40_RE-pitch.pdf
On Tue, Aug 9, 2016 at 9:24 AM, Jonathan Goff <jongoff@xxxxxxxxx> wrote:
And Ursa Major Technologies is working on a 5klbf LOX/Kero staged
combustion engine that may also provide another data point once they get it
firing.
~Jon
On Tue, Aug 9, 2016 at 10:16 AM, Ben Brockert <wikkit@xxxxxxxxx> wrote:
Kestrel is also one of SpaceX's earliest engines. They've made big
improvements on T/W of Merlin over the years, as every engine program
does; I expect a modern Kestrel would be closer to 100:1.
Ventions has an electric pump fed engine of a similar size to
Rutherford, I wonder if Adam London could be prodded to share its
weight.
Ben
On Tue, Aug 9, 2016 at 3:39 PM, Zachary Martinez <znm3m8@xxxxxxx>
wrote:
Kestrel has a mass of 52kg (115lb) and a vacuum thrust of 6900lbs. Itis an upper stage engine and only has a chamber pressure of 135 psi though.
wrote:
Zachary Martinez
On Aug 9, 2016, at 6:10 AM, Uwe Klein <uwe@xxxxxxxxxxxxxxxxxxx>
Am 09.08.2016 um 05:06 schrieb Henry Spencer:
Aestus engine
111kg offered on:
https://de.wikipedia.org/wiki/Aestus
https://en.wikipedia.org/wiki/Aestus#Aestus_II_.2F_RS-72
This guy has collected a lot of information.
( slightly offset from the "ring"sourcing sites in the EN domain.)
http://www.bernd-leitenberger.de
uwe
