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KSP-RO / ROCapsules

ROCapsules is a mod that takes the best versions of capsules available and uses them as the in-game models for Realism Overhaul parts.
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Put mercury posigrade motor isp the same as retrograde motor #152

Closed Clayell closed 1 year ago

Clayell commented 1 year ago

I have no idea where the original values of the retrograde and posigrade motors' specific impulse (the very specific value of 107.04) came from, but in my opinion it seems quite unrealistic. If I recall correctly, even helium has a higher specific impulse than 107. Perhaps a value of around 190 is possible due to the very small engine bell that the posigrade motors used, but unless someone finds a isp value for the posigrade motors I thinking keeping it at the same as the retrograde motors is fine.

Please do tell me if you do happen to find an isp value for the posigrade motors, I looked for several hours and I could not find anything.

Capkirk123 commented 1 year ago

Seems reasonable enough. Since the impulse applied to Mercury by the posigrade motors is known (~15 ft/s), I have decreased their fuel load to keep their overall impulse the same. This also worsens their mass ratio to below 1, which seems reasonable for a early SRM of this size.