We're still adding engines to our part roster, and here's a peek at one that's still in the early whitebox phase -- we still haven't come up with a Kerbal-fied name for this LOX-Augmented Nuclear Thermal Rocket (or LANTR). Super NERV? SNERV? Suggestions welcome!  A few details for our forum friends: This is a 2.5m part that, like the new NERV, runs on liquid hydrogen fuel. This engine also has a hidden talent: liquid oxygen can be injected into the nozzle to create a high-thrust mode, and