[Public-List] Prop Survey

[n4lbl]

I can't find the free-ware program.  Where is it please??

thanx,,,
     Alan

On Mon, Aug 13, 2012 at 8:29 PM, Don Campbell <dk.campbell at sympatico.ca>wrote:

>  Here is a free ware programme for you to play with. You will find that
> you cannot apply more than about 16 HP to an Alberg prop to get hullbspeed
> regardless of the motor. It works on excel and the pages at the bottom are
> the entry options. I have a 13-8 2 blade and it works just fine. You will
> also find that 7 is the normal pitch and that if you go lower to a 6 you
> will have more power at slow speeds and an 8 will give you more power at
> high speeds. Because I rarely need power at slow speeds, I chose an 8 for
> the power at high speeds- less slippage and there is about 50 -55% slippage
> built in to every prop. That is a waste as far as I am concerned. 13 is the
> max diameter that you can get into the space in the rudder. You will note
> the rules of thumb on the relationship between pitch and diameter and RPMs
> for the motor. Match those to the torque and HP curves for your motor.
> Don #528
>
>
> On 8/12/2012 4:05 PM, Jeffrey wrote:
>
>> I'm curious about what propellers others are using in their A30's?
>>
>> My boat came with a large three bladed prop, I can't remember the size
>> but it was tight in the aperture.
>> https://picasaweb.google.com/**lh/photo/Fpj8A9TYOoJ72WipyH_**
>> XMNMTjNZETYmyPJy0liipFm0?feat=**directlink<https://picasaweb.google.com/lh/photo/Fpj8A9TYOoJ72WipyH_XMNMTjNZETYmyPJy0liipFm0?feat=directlink>
>>
>>
>> Each blade was big! It really moved the boat well. Unfortunately that
>> old prop was less bronze and more copper so we changed it when I
>> replaced the shaft. After hearing such good things about the Campbell
>> Sailer prop, I ordered one after speaking with Norm at West by West
>> Enterprises. http://www.westbynorth.com/**CampbellSailer.aspx<http://www.westbynorth.com/CampbellSailer.aspx>.
>> Norm was
>> great to work with, and after discussing back and forth I ordered the
>> 12" diameter x 8" pitch three bladed Campbell Sailor.  My first
>> reaction when I received it was that it was TINY compared to the old
>> prop!  I think Norm got the size right, the prop was able to push the
>> boat to hull speed just about at the max of my motor. However, after
>> three seasons with this, I'm contemplating a new prop.  What I dislike
>> about the Campbell Sailer is that it is very sensitive to seaweed.
>> Even a small bit of weed, or grass and we're lucky to hit 2 knots.
>> With this prop, removing seaweed is almost a daily chore if we are
>> traveling very far.
>> https://picasaweb.google.com/**lh/photo/botBsyVFuOPFFBQSC2_**
>> OhdMTjNZETYmyPJy0liipFm0?feat=**directlink<https://picasaweb.google.com/lh/photo/botBsyVFuOPFFBQSC2_OhdMTjNZETYmyPJy0liipFm0?feat=directlink>
>>
>> So, if you know what size prop you have and are happy with it please
>> speak up!
>>
>> Jeff Fongemie
>> #116 Seagrass
>>
>> http://picasaweb.google.com/**fongemie<http://picasaweb.google.com/fongemie>
>>
>>
>>
>>
>>
>>
>>
>>
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