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Balancing for RS88 orbital engine #26

Closed zorg2044 closed 1 week ago

zorg2044 commented 3 weeks ago

Need to work our appropriate thrust and Isp values based on Bantam engine family documents. Since the entire family was conceptualised across a wide range of thrust levels, the orbital version does not have to be a direct evolution of the abort motor.

(also need to add subtype descriptions)

EmberSkyMedia commented 3 weeks ago

Here is the abort Motor info, it should be noted that it IS designed to be used for aborts on the Starliner if required, so the TWR of Starliner Capsule + SM with 4 motors needs to be more than the TWR of the launcher. I did a test (posted in balance general) that indicated for a "to orbit" setup it currently does. https://ntrs.nasa.gov/api/citations/20050237017/downloads/20050237017.pdf

zorg2044 commented 3 weeks ago

This note was more to remind me to check the figures for the vacuum nozzle variant thats included. There were 3 different pressure fed variants in the Bantam family of engines that were conceptualized with 1:100 area ratio nozzles (and one with turbo pumps which isnt relevant). But anyway I will be getting to this later as I'm away for a few days.

The standard (abort engine) variant seems mostly in the right ballpark now.