I'm not sure but didn't Mitsubushi Heavy move to production of this engine under the name "MB-60"?
No business case
Quote from: Jim on 07/31/2012 11:21 amNo business caseReally? Well I imagine that with an MPS required for the second-generation CPS and the DoD NGE requirement, there is now plenty of reasons to at least look at the proposal again. RL-60 has about twice the thrust of the proposed NGE spec and comparable Isp. I also understand that it was meant to be compatable with the existing EELV upper stages.
Just because it has twice the thrust of the NGE spec doesn't mean it meets the requirements for EELV missions, especially for the current stages.