Kort Nozzle with MARIN 37 profile

This is a http://en.wikipedia.org/wiki/Kort_nozzle for a boat or submersible propeller. The purpose of this is to increase the thrust at low speeds. These are commonly used in commercial ROVs.The profile is Maritime Research Institute Netherlands (MARIN) No. 37, which sacrifices some forwards thrust for better backwards thrust. --- Imported from Thingiverse: https://www.thingiverse.com/thing:10775 Original creator: ttsalo