Shorten the prop, lengthen the prop, change the pitch and you will
necessisarily change the placement of the redline on the tach.

Doesn't this imply that redline RPM isn't related to engine limitations?

Why would (just for example) shortening the prop allow one to raise the RPM
limit of the engine?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"