trying to figure out the "ata" gauge

[Artist]

Viper2000,

thank you for your knowledgeable input!

Originally Posted by Viper2000

The ideal solution to this problem would be either to change the gear ratio between the propeller and engine at high altitude, so that the propeller could turn faster and keep the same velocity triangles (which was actually investigated in the early days of flight but is impractical for various reasons)[...]

May I press you for an elaboration of these "various reasons"?

Artist