Hi Peter-
Thanks a lot for the updates. I've pasted a few comments below to your
inquires.
As a somewhat related aside, I'm somewhat confused by Rocketlab's electric
pump. They claim they are using a single 50 HP motor @ 40k RPM's
http://aviationweek.com/space/rocket-lab-unveils-battery-powered-turbomachinery
...but given the rough calculations I've done that seems like not enough power
to get a really high pressure chamber pressure. I should note though that I
haven't seen them publish their actual chamber pressure but I did a bit of
rough calculations and estimated it to be about 2200 psia.
All the Best,Graham
On Wednesday, December 14, 2016, 12:49:11 PM EST, <cnc-engineering@xxxxxx>
wrote:
Hi Graham,
good to know, that you are involved in current activities !
- I agree, that two motors could be used in one pump application, in case
power of a single unit won't be sufficient. (Rocket Lab is doing the same, i.e.
using one pump for LOX and Kerosene each.)>> Actually, what I meant is that if
you needed for example 60 kW to power a pump you could use 2 30kW motors to
power a single shaft
=> do you have any other idea where to look for high-power / high-RPM motors
?>> Not much higher than that. 30 kW seems to be about the maximum for small DC
brushless motors.
Please keep us updated concerning your progress !>> Will do!
Best,
Peter
