[Public-List] Prop while sailing, locked or free to spin ?

Fri Apr 22 10:44:45 PDT 2016

Thanks Mike; I reckon I I followed the folklore!

Better to know the facts

G

On 2016-04-22, at 2:12 PM, meinhold272 at gmail.com wrote:

> The drag difference is not large, but the unnecessary wear on shaft log and sometimes gears usually pushes larger ships to lock an inactive shaft  
> 
> Mike
> 
> Michael J. Meinhold 
> meinhold272 at gmail.com / 301 852 0619
> 
>> On Apr 22, 2016, at 12:03 PM, Gordon Laco via Public-List <public-list at lists.alberg30.org> wrote:
>> 
>> But of course it should be kept in mind that a windmilling prop generates
>> drag which is calculated as a function of the swept circle... Whereas a
>> locked prop generates drag calculated as a function of the blade area alone.
>> A locked prop is significatly better with regard to sailing performance...
>> 
>> Gord #426 Surprise (hard at it preparing PICTON CASTLE for sea here in
>> Lunenburg)
>> 
>> 
>> On 2016-04-22, 10:54 AM, "Wes Gardner via Public-List"
>> <public-list at lists.alberg30.org> wrote:
>> 
>>> I just heard from Chris, for my motor/trans, he says I can let it turn...
>>> 
>>> Wes
>>> Griffin's Faith #196
>>> 
>>> On Fri, Apr 22, 2016 at 10:30 AM, Wes Gardner <wesgardner1952 at gmail.com>
>>> wrote:
>>> 
>>>> From what I can tell, some transmissions don't like being turned while the
>>>> motor is not running and some don't care.  Mine, from what I can tell from
>>>> Chris Oliver is a "splash type" trans.  I will hazzard a guess that mine
>>>> wouldn't care (as long as the fluid is at the correct level).  Chris
>>>> commented on this while we were reinstalling my motor - he says that these
>>>> types of transmissions are fairly sensitive to both "too high" and "too
>>>> low"  fluid levels...I have a Vetus 3.10.
>>>> 
>>>> Hopefully others will have more...
>>>> 
>>>> Wes
>>>> Griffin's Faith #196
>>>> 
>>>> On Fri, Apr 22, 2016 at 10:23 AM, Jonathan Bresler via Public-List <
>>>> public-list at lists.alberg30.org> wrote:
>>>> 
>>>>> Folks,
>>>>> 
>>>>> Have heard from list members to lock the prop while while.  Several of our
>>>>> racing members do so by putting the A-4 into gear after rotating the shaft
>>>>> to "hide" the two blade prop behind the deadwood.   Some folks use a
>>>>> vise-grip on the shaft with the handle against the hull to stop the shaft
>>>>> and prop from spinning.
>>>>> 
>>>>> While sailing last night, I came up with a slightl different way to lock
>>>>> the prop.  Wrapped the rubber strap from a rubber strap oil filter wrench
>>>>> around the shaft till the handle was held against the hull.   Worked
>>>>> great.  Getting it off, required a good steady pull on the handle to spin
>>>>> the shaft backwards a few rotations.  Had picked up a pair of these strap
>>>>> wrench at Advance Auto in their discount bin for $5.00, I seem to
>>>>> remember.  Useful for removing the oil filter, as well.
>>>>> 
>>>>> So what do you do ?
>>>>> Lock the shaft or not?
>>>>> If you lock the shaft, how ?
>>>>> 
>>>>> Sample:
>>>>> 
>>>>> https://www.buysend.com/en-US/Product/Details/20985?U=2pc-silverline-500mm-6
>>>>> 00mm-mechanics-plumber-rubber-strap-wrenches/&gclid=Cj0KEQjwl-e4BRCwqeWkv8TW
>>>>> qOoBEiQAMocbP9E1Gluu36O8RLAr6XhNvZTNK4zs6HU8NoPloic7aY8aAs0c8P8HAQ
>>>>> 
>>>>> --
>>>>> Jonathan M Bresler
>>>>> S/V Constance Alberg 30 #262
>>>>> Annapolis/Eastport MD
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>> 
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