[Public-list] Propellers

[Gordon Laco]

A free-wheeling creates more drag too.

Gord #426





> You should not have you engine in neutral when sailing and the prop should
> not be turning. Without the engine running, there is not adequate oil
> circulation and you could damage your transimission if you the the prop
> 'free wheel'.
> 
> 
> 
> Mike Lehman
> ~~~_/)_/)~~_/)~~~
> 
> 
> 
> 
> ----Original Message Follows----
> From: Rob Alley <1ralley at comcast.net>
> Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
> To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
> Subject: Re: [Public-list] Propellers
> Date: Fri, 08 Jul 2005 16:41:45 -0400
> 
> Three questions:
> 
> 1.  Who makes the machinery prop, please?
> 2.   Do you know--how many RPMs did you get with your old prop in neutral
> when sailing? 3.   How many RPMs does the new prop turn when sailing in
> neutral at the same speed?
> 
> Thanks
> 
> Rob
> 
> Dudley Baker wrote:
> 
>> All
>> Much has been written on proper propellers, but here is my additional  2
>> cents:
>> - Last summer, (first season for me with the boat), speed and power were
>> awful with existing prop
>> --- I have a Universal MX-25, 2:1 (23 hp).  Prop was a 3-bladed 13 X 9
>> Sailor.
>> -  In the end, I decided to change out the prop for a 3-bladed 13 X 12
>> Machinery.    What a
>> difference!!.  At a very comfortable 1200 rpms, I am moving at 5 knots.
>> Max speed is over 6 kts @
>> 2800 rpm
>> - If you want performance go to the machinery "mickey mouse ears" shape!!
>> 
>> Dudley Baker
>> 297 Heron
>> 
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>> 
>> 
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