EA772LR From United States of America, joined Mar 2007, 2838 posts, RR: 10 Posted (8 years 2 months 3 days 16 hours ago) and read 12103 times:
Does anyone on here have any crazy amazing facts about the GE90-110/115B? We all know the thrust numbers and technical info, but what about any other cool facts. (Kinda like on Boeing's homepage with their fun facts about their aircraft.) Just a thread to break up the monotany.
We often judge others by their actions, but ourselves by our intentions.
A single 777 engine has more thrust than all eight engines on the B-52 combined.
That was true for early B-52s but not for the last couple of of models, including those still in service, equipped with P&W TF-33 turbofans (military version of the JT3D on most 707s and DC-8s). I believe the TF-33 on the B-52 has about 17,000 lbs of thrust, or 136,000 lbs. for the 8 engines combined. Still not that much more than a single GE90-115B!
JetMech From Australia, joined Mar 2006, 2700 posts, RR: 53
Reply 9, posted (8 years 2 months 5 hours ago) and read 10695 times:
Quoting EA772LR (Thread starter): We all know the thrust numbers and technical info, but what about any other cool facts.
But technical facts are fun! GE states that at take-off power, the fan is spinning at 2552 RPM. GE also states that the GE90-115B delivers an equivalent of 145,000 hp (108,126 kW). Assuming this to mean the maximum power delivered by the fan at take off conditions, there is about 298,415 ft-lb (404,597 Nm) of torque being delivered by the LP turbine to the fan under these conditions. The LP turbine would probably need to deliver more torque than this to the LP spool, as it also needs to provide power to the booster section. IIRC, GE had to develop an new alloy for the LP shaft to withstand this phenomenal amount of torque.