Buffet Boundary
I'm hoping someone can join the dots on this one please ....
I understand that maximum lift coefficient decreases with altitude due to reducing Reynolds number. I also appreciate that the buffet boundary is usually specified as a single line of CL -v- Mach.
Why does the buffet boundary not also vary with altitude, as maximum lift coefficient does, so you'd also expect the buffet CL to as well?
Thanks in advance.