I can't really find this anywhere, but what kind of action is the Inspire skill (page 95)? I assume (and hope) its a free action and not a 1-minute long skill like Charm?

Loki77515 said:

Inspire isn't a distinct skill, but rather a specific use of the Charm skill.

However, as a GM I'd be inclined to vary the time taken to use the Charm skill based on what it is the character is attempting to do - rousing oratory may take a while, but bellowing "For the Emperor!" and leading by example would take much less time.