Originally Posted by hawk37
Misd-Agin. thanks for the info. Sound like the fmc data is true minimum drag speed, in which case holding at said speed seems likely quite a handful.
Do the fmc holding speeds (I presume they are in KIAS) increase with altitude? This would make sense as minimum drag KCAS is also expected to increase with altitude.
Hawk
Yes, they're in KIAS. No, FMC holding speeds do not increase with altitude. That's the gist of the problem. They researched acceptable speeds and apparently realized the Vref +80 (+100 > FL250) was always an acceptable holding speed.