Propeller/Ground-Clearance

[Zipper730]

What was the generally accepted minimum acceptable clearance from the propeller tip to the ground on a conventional-gear or a tricycle landing-gear?

 

[bobm4360]

For conventional gear, with aircraft level and struts compressed, nine inches. For tricycle gear, seven inches.

 

[Zipper730]

For conventional gear, with aircraft level and struts compressed, nine inches. For tricycle gear, seven inches.

When you say compressed, do you just mean the plane's sitting on the gears?