I have a Gori 2 blade 11.5 x 8 on Windburn, a 77 30-1 with an Atomic 4 ( Stevedore ). My guess is that at 8 it is over pitched but 11.5 x 8 appears to be the smallest standard Gori prop size. I can get to about 6.2 kts into light weather, and can tow another 10,000 lb boat into waves at 5 kts. Reverse is fine though full power at a standstill can invoke a lot of prop walk.
The advantage of being over pitched is that during light motor sailing the Atomic 4 is just above idle, quiet and smooth. I have no complaints, though I usually am under auxiliary only coming in and out of the club. If your usage included days of motoring into current and waves and as a cruiser you are carrying more weight ( Windburn is pretty light for racing ) then I would be concerned about the 8 pitch. When I spoke with a Gori rep at the Toronto boat show he mentioned they can make the props at different pitches. Michael Brown Windburn C&C 30-1 Date: Tue, 22 Dec 2015 10:10:28 -0500 From: cenel...@aol.com To: cnc-list@cnc-list.com Subject: Re: Stus-List Folding prop for 30-1 with A4 Message-ID: <151ca3dd4c9-520f-...@webprd-m99.mail.aol.com> Content-Type: text/plain; charset="utf-8" No two blade prop will do very well in reverse although I would get a geared one so that you can be sure that it opened. If you race, the lowest drag 2 blade demonstrated by tests in Yachting magazine was a Gori--which I have used for several years without problems. It takes a few seconds running in reverse to start 'biting' and moving the boat but she will move the boat. Once the boat is moving, you start to get some flow over the rudder and can actually steer. Just be sure you have reasonable room around the boat when you go to reverse. In my case, I coast to almost a dead stop, put it in reverse and rev the engine to get her moving in reverse and then steer her toward the slip with judicious use of low throttle in reverse or neutral. Without serious wind or tides, this method works for me--she only goes back into forward to stop her in the slip. If something messes up this scheme, back to open water and repeat! Maneuvering in close quarters between reverse and forward with several seconds delay is to be avoided with any folding prop IMHO. Charlie Nelson C&C 36 XL/kcb Water Phantom cenel...@aol.com
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