The article didn't mention numbers about the expected thrust of the engines, but it gave some ballpark figures to do estimates with. The engine fires for three

The article didn't mention numbers about the expected thrust of the engines, but it gave some ballpark figures to do estimates with. The engine fires for three days to set up a mars transfer orbit. Contrast this with the trans-lunar injection with the S-IVB rocket that was used in the Apollo program, which fires for 350 seconds. Mars is a lot farther away than the moon, but this was the only figure I could find with a quick wikipedia search.