belovedeagle t1_irpj0qk wrote on October 10, 2022 at 1:23 AM

Well, yeah, where did you think the thrust was being generated? They're not shooting flames out the back so, a priori, the reaction thrust has to be low to none. I think I'm more surprised that the reaction thrust is as high as 1/4 of the total thrust. I always imagined it was basically a turboprop but the primary fan helped the compressors out a bit but I guess that's not quite right.

PM_UR_NUMBER_IN_HEX t1_irqj9gl wrote on October 10, 2022 at 7:42 AM

Flames would come from an afterburner (which would need to be activated) , a low bypass jet engine doesn't normally shoot flames either.