Vx and Vy
Gentlemen,
Hopefully I am not asking a question that was answered in another thread. For the record, I did a search and did not find anything.
So my question to the experts: Why does Vx increase with altitude, and why does Vy decrease with altitude? I know both speeds have to do with topics such as total drag, thrust available, excess power, etc, but am having trouble incorporating it into a well developed explanation, and am not sure if I fully caught on myself.
Thanks in advance.