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Old 25-03-2016, 11:00   #31
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Re: Prop Diameter vs Pitch Relationship

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Originally Posted by a64pilot View Post
Yeah, that might well do it with the reverse flow and all.
Do you do that? I'm the paranoid type so I know if I put myself into a position to where a large application of reverse thrust is needed, it won't be there, that will be the day the shift cable breaks or engine dies, that's the way my luck runs.

On edit, since a normal props trailing edge becomes the leading edge in reverse, that might make cavitation even more likely, so I can see how now you have two conditions that might lead to cavitation?
Yes I do, with heavy sailboats, long keels etc. I'm in the "come in hot and stop fast" camp. Always have control that way. Me and Capn Ron I guess!
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Old 25-03-2016, 11:01   #32
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Re: Prop Diameter vs Pitch Relationship

you can try play with this XL table..

http://mantis.b2net.net/dw/propeller_calc.xls
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Old 25-03-2016, 11:08   #33
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Re: Prop Diameter vs Pitch Relationship

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Me and Capn Ron I guess!
I did like that part of the movie, and with my fixed prop and the excessive prop walk I had, I would use hard reverse to turn to Starboard, It worked well, but with this prop I have now, there is no prop walk, and no reason to use hard reverse. I miss the prop walk.
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Old 25-03-2016, 11:23   #34
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Re: Prop Diameter vs Pitch Relationship

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Originally Posted by a64pilot View Post
I did like that part of the movie, and with my fixed prop and the excessive prop walk I had, I would use hard reverse to turn to Starboard, It worked well, but with this prop I have now, there is no prop walk, and no reason to use hard reverse. I miss the prop walk.
Yes, I actually like prop walk. Once you know your boat you can do most anything! That shot of Capn Ron coming in hot and placing the boat perfect is actually very doable. Of course, there is a time and place for everything.
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