I am trying to estimate battery weights for electric pump fed rockets of various sizes and wanted to use the electron rocket as data to validate my calculations. However I was unable to find the mass of the battery pack that delivers the power for the 9 Rutherford engines in the Electron rocket.
Does anybody know where to find this data or know a reasonable estimate?
Apparently the whole engine weighs 35kg so 35Kg-20Kg = 15kg. Though the battery is for all engines so 135Kg. Based on those numbers I'm sure it's not a standard rechargeable lithium cell. It would be a lithium primary cell. Much like what is used to power torpedo's and other kamikaze weapon systems. Remember the whole objective was to simplify the engine systems, not necessarily reuse them a million times.
The ideal would be a hydrolox engine kept simple by using a fuel cell to power the electric pumps. Unfortunately it's proving quite difficult to get a fuel cell with sufficient power density.
