[Public-List] Prop while sailing, locked or free to spin ?
Gordon Laco via Public-List
public-list at lists.alberg30.org
Fri Apr 22 09:03:30 PDT 2016
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
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...
> Griffin's Faith #196
> On Fri, Apr 22, 2016 at 10:30 AM, Wes Gardner <wesgardner1952 at gmail.com>
>> 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...
>> 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:
>>> 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 ?
>>> Jonathan M Bresler
>>> S/V Constance Alberg 30 #262
>>> Annapolis/Eastport MD
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