Help...if anyone out there knows the answers I'd really appreciate it:
If the aircraft (my flight HAL457 from HNL to HND ) is flying into headwinds ranging from 50-175 mph, such that even though the indicated airspeed is as high as 580 mph but the net ground speed is as low as 380 mph, why not take a slightly different route or altitude? We were between FL 360 to FL 380 for most of the flight. Does the plane fly efficiently with this much headwind for so much of the flight? From what I understand the return flight from Japan to Hawaii will take only about 6 to 7 hours so there's lots of sense in that. But 9 hours into headwinds that would lift a Cessna 172 up off the ground with zero ground speed?