Kortz nozzle for electric motors

[Delaney]

I never see anything about using a kortz nozzle on any type of electric motor. Would not using the nozzle be very effective at increasing thrust:?:
I know several companies make prop guards that supposedly increase thrust, but are their claims legit?

Seems like putting a torqeedo or other powerfull motor in a kortz nozzle would really put out some thrust. Please steer me to a previous thread if there is one or let me know what you all think. Thanks.

[daiquiri]

Forum ---> "Search" ;)

http://www.boatdesign.net/forums/boat-design/shrouded-propeller-v-s-nonshrouded-opeller-24756.html
http://www.boatdesign.net/forums/propulsion/caged-propellers-26639.html

[Rick Willoughby]

I never see anything about using a kortz nozzle on any type of electric motor. Would not using the nozzle be very effective at increasing thrust:?:
I know several companies make prop guards that supposedly increase thrust, but are their claims legit?

Seems like putting a torqeedo or other powerfull motor in a kortz nozzle would really put out some thrust. Please steer me to a previous thread if there is one or let me know what you all think. Thanks.

You use a nozzle to reduce induced drag on a prop in highly loaded applications. The idea with electric drives is to design props that do not have heavily loaded blades. Once you do this a nozzle is a disadvantage due to the added drag of pushing the nozzle through the water.

Rick W