Right George, makes more sense on stage 2.
Ken
On Sat, Apr 8, 2023 at 9:56 AM George Herbert <george.herbert@xxxxxxxxx>
wrote:
On Apr 7, 2023, at 11:36 AM, roxanna Mason <rocketmaster.ken@xxxxxxxxx>
wrote:
This is how Rocketlab pumps both stages of its Electron rocket. Rare Earth
permanent magnet motors with Lion batteries in which half the battery pack
it jettisoned during stage one boost. A Coke can sized motor generates 50
HP.
Pretty cool.
Minor detail; on Electron, it’s the upper stage that drops a first battery
pack before continuing to orbit on a second. The first stage has too much
upper stage above it to justify a swap and drop; Mf savings is negligible
there. For upper stage it’s significant.
-george