Alec,
As a coincidence, my recent foray into the homebuilt ROV, world had me come to the same conclusion as to the difficulty of homebuilt Kort nozzles.
I was taking a quick peek at the hovercraft crowd for ideas, when I stopped to get back to marine studies.
http://www.indstate.edu/mct/hovercraft.htm
Hope this turns into a viable lead, Doug has some leads on his website as well.
Joe
From: "Smyth, Alec" <Alec.Smyth@compuware.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: [PSUBS-MAILIST] Kort nozzles
Date: Sun, 16 Jul 2006 16:04:38 -0400
I've been searching the web for a supplier of Kort nozzles, but all I can find is custom jobs for ocean going ships. I did find www.propguardmarine.com, but what I'm really after is known as a Marin 19A type nozzle, in a size of around 15" ID. I would try and turn a nozzle on my lathe, but the lathe is a couple of inches too small. Has anyone given thought to fabrication methods for this other than machining out of solid material?
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thanks,
Alec