Another Lock Your Prop article
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Re: Another Lock Your Prop article
I'm not even going to consider offering the following additional comments/analysis:
With a three bladed prop, only one blade could be behind the keel whether the prop is spinning or not. That leaves two blades to do their mischief. But would the drag merely slow the boat or would it raise or lower the stern at the same time? I suppose you'd get a different answer port vs. starboard tack, and also depending if you have a RH or LH prop. I can see where lowering the stern a bit might increase the waterline length a bit, increasing hull speed. So that said and presuming it's true, would a locked prop or spinning prop create the most benefit?
What about prop walk? Would you point higher on one tack and lower on the other?
With a three bladed prop, only one blade could be behind the keel whether the prop is spinning or not. That leaves two blades to do their mischief. But would the drag merely slow the boat or would it raise or lower the stern at the same time? I suppose you'd get a different answer port vs. starboard tack, and also depending if you have a RH or LH prop. I can see where lowering the stern a bit might increase the waterline length a bit, increasing hull speed. So that said and presuming it's true, would a locked prop or spinning prop create the most benefit?
What about prop walk? Would you point higher on one tack and lower on the other?
Fair winds, Neil
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
- tjr818
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Re: Another Lock Your Prop article
How about a Jet Drive? No prop walk, no lobster pots, how hard could it be
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Tim
Nonsuch 26 Ultra,
Previously, Sláinte a CD27
Nonsuch 26 Ultra,
Previously, Sláinte a CD27
- winthrop fisher
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Re: Another Lock Your Prop article
Hey Neil,
how long have you been a fleet Captain, just asking,
thanks winthrop
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thanks winthrop
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Re: Another Lock Your Prop article
I was Northeast Fleet Captain 2010-2011. I'm the CDSOA Commodore now!winthrop fisher wrote:Hey Neil,
how long have you been a fleet Captain, just asking,
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thanks winthrop
Fair winds, Neil
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
Re: Another Lock Your Prop article
Neil,Neil Gordon wrote:From Yachting Monthly. http://www.yachtingmonthly.com/gear/loc ... spin-29526
By the way, have you noticed that the button for starting a thread says, "New Topic." Should we petition the web masters for a "Here We Go Again" button?
You still pushing this falsehood?
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I am totally vindicated.
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Re: Another Lock Your Prop article
having followed this thread/topic for a decade or so on this board, I've reached this conclusion:
Follow the manufacturer's instructions for your particular engine/transmission. Major repairs or replacement will most definitely slow most of us down.
Follow the manufacturer's instructions for your particular engine/transmission. Major repairs or replacement will most definitely slow most of us down.
Fair winds, Neil
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
s/v LIQUIDITY
Cape Dory 28 #167
Boston, MA
CDSOA member #698
Re: Another Lock Your Prop article
You are absolutely correct, and I couldn't agree more.Neil Gordon wrote:having followed this thread/topic for a decade or so on this board, I've reached this conclusion:
Follow the manufacturer's instructions for your particular engine/transmission. Major repairs or replacement will most definitely slow most of us down.
But, I thought the question, all along was "does a locked prop or a spinning prop cause more drag?" (obviously irregardless of any other considerations), NO??
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Re: Another Lock Your Prop article
I proved that locking the 3-bladed Michigan wheel on KAYLA could slow her down by as much as a full knot.darmoose wrote: But, I thought the question, all along was "does a locked prop or a spinning prop cause more drag?" (obviously irregardless of any other considerations), NO??
However, since I switched to a Campbell Sailor I routinely lock the prop just to get the throttle-shifter out of the way.
And just for the record: Any comparison between aircraft props and sail boat props is ludicrous - I have yet to see an aircraft prop designed for under water use.
Oh, yeah. That's just like in my 50+ years of sailing I have never seen a tiller boat carry an emergency wheel either...
-michael & Toni CDSOA #789
s/v KAYLA CD28 #318
2012 FLSTC Heritage Classic
Niceville FL
+30° 30' 24.60", -86° 26' 32.10"
"Just because it worked, doesn't mean it works." -me
No shirt + No shorts = No problem!
s/v KAYLA CD28 #318
2012 FLSTC Heritage Classic
Niceville FL
+30° 30' 24.60", -86° 26' 32.10"
"Just because it worked, doesn't mean it works." -me
No shirt + No shorts = No problem!