amimai Thanks for mentioning that; Unfortunately i've only dabbled with actual Dv effects for a short while, but i've been planning to do something along those lines.
From what I have seen though, in the instances which I have observed, more exhaust velocity is more desirable despite mass increases; The returns for this tail off quickly however, and I have not put any time into mapping the data.
I'll certainly move it up on my to do list for the future though!
acetylcholine Well you're certainly right about being able to shave off injector weight; But making it smaller would be the incorrect way of doing things!
Here is what can be done to greatly improve TMR: - Bumping up the injector radius to 1.2m, decreasing its RPM to 20 and switching to lithium. This will save you a huge amount of weight while maintaining coolant flow of 2.07t/s.
- Setting gimbal inner radius to 1.7m to compensate and changing to potassium momentum wheels running at 900RPM.
This is all assuming you have a reactor core height of 4.8cm, since you didn't show that in your picture. You can also loose 1kg of control rod mass!
Doing this will leave you with savings of 138kg and 100c per engine; And in case I missed anything here is what changes I made. Hope this helps!