Hmm...I think you're right. That's 139 hits for "Bremleistung" and 123,000 for Bremsleistung. It would sure help us language learners if you Germans could learn how to spell korektly.

OK, so what would Bremsleistung mean in terms of an aircraft engine? And why would it be a relevant specification? This box of the table provides the information Pi=180PS and n=1400 umdr/min ("umdrehungen"/rotations per minute).