On 09/08/16 21:33, Jonathan Goff wrote:
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
<mailto:lars.osborne@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.
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
<mailto: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
<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
<mailto: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 <mailto: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 <mailto:znm3m8@xxxxxxx>> wrote:
> Kestrel has a mass of 52kg (115lb) and a vacuum
thrust of 6900lbs. It is an upper stage engine and only
has a chamber pressure of 135 psi though.
>
> Zachary Martinez
>
>> On Aug 9, 2016, at 6:10 AM, Uwe Klein
<uwe@xxxxxxxxxxxxxxxxxxx
<mailto:uwe@xxxxxxxxxxxxxxxxxxx>> wrote:
>>
>>> Am 09.08.2016 um 05:06 schrieb Henry Spencer:
>>> Aestus engine
>>
>> 111kg offered on:
>> https://de.wikipedia.org/wiki/Aestus
<https://de.wikipedia.org/wiki/Aestus>
>>
https://en.wikipedia.org/wiki/Aestus#Aestus_II_.2F_RS-72
<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
<http://www.bernd-leitenberger.de>
>>
>> uwe
>>
>>
>
