[Rhodes22-list] Prop Pitch

[Bud]

Bill,
  the thicker Overton catalogs have a good discussion on prop pitch and 
selection..
Also they have form listed on the page that you can fill out and send in 
- to help
them identify the right prop for you.

-Bud Connor


Bill Effros wrote:

> Peter,
>
> 6.5 Pitch Prop.
>
> I know mechanically what that means, but I never understand what it 
> does.  What is the standard prop for motorboats?  Why?
>
> I want a prop that will allow me to go slow.  There is a lot of wind 
> and current where I dock.  I want a prop that will allow me to slowly 
> approach the dock, whether or not there is wind and current, without 
> disengaging the prop, without stalling out, and without forcing me to 
> coast in for the last 5 to 100 feet depending on wind and current 
> conditions.
>
> I don't care if I have to rev higher to get the boat to hull speed.
>
> What prop do I want?
>
> Bill Effros
>
> Peter Thorn wrote:
>
>> Hi Lou,
>>
>> Congratulations on completing that ugly task.  May everything be 
>> downhill
>> for you from here on.  I bought Tohatsu 9.8 for Raven, but I really 
>> wanted
>> an 8hp.  At the time the distributor was all out of 8s, so I settled 
>> because
>> I needed it then.  The motor weighs 82 pounds same as the 8, the 
>> lightest 4
>> stroke on the market.  Added a 6.5 pitch prop, (for sailboats) and
>> everything works quite well.  95% of the time, Raven motors at 1/16 
>> throttle
>> and 4-4.5 knots.  It's the best compromise for most quiet, least 
>> vibration
>> and best speed through water there.  Less than 1/2 gal per hour fuel
>> consumption there too.  Any time I would like, I can twist up to 1/4
>> throttle and hull speed.  Beyond that, just bigger and bigger waves.  
>> That
>> 9.8 can really make some big ones!
>>
>> Just returned from Oriental to Ocracoke -- fantastic trip!  Waiting to
>> exchange pictures with my fellow adventurers and write up my log 
>> notes, then
>> will post to the list.  Not sure I can do better than Chris G 
>> though.   A
>> real South Western Odysseus!
>>
>> PT
>>
>>
>>
>> ----- Original Message ----- From: "Lou Rosenberg" <lsr3 at MAIL.nyu.edu>
>> To: "Richard Smith" <sailnut at worldnet.att.net>; "The Rhodes 22 mail 
>> list"
>> <rhodes22-list at rhodes22.org>
>> Sent: Tuesday, October 25, 2005 4:16 PM
>> Subject: Re: [Rhodes22-list] Lou's CB trunk almost done
>>
>>
>>  
>>
>>>  Thanks Richard,
>>>  Ok  I will look into Eldridge, and I do plan to time my passage.
>>>  So you are saying that an 8hp is plenty for the Rhodes in most
>>>   
>>
>> situations?
>>  
>>
>>>  Lou
>>>
>>>   
>>>
>>>> < will a 8hp Tohatsu get me around Hells Gate where the Triboro
>>>>     
>>>>
>>>>> Bridge meets the East River, with the tide coming in and the current
>>>>> going south?>
>>>>>       
>>>>
>>>> Five horsepower is plenty.  The speed of the current in this area can
>>>>     
>>>
>> exceed
>>  
>>
>>>> the hull speed of the boat.  No reasonable amount of power will 
>>>> overcome
>>>> that limitation.  Get a copy of Eldridge and time your passages to 
>>>> take
>>>> advantage of the current not fight it.
>>>>
>>>> The heavy engine on the stern will worsen the hobby horsing 
>>>> tendency and
>>>> associated cavitation in rough conditions.  Exactly when you don't 
>>>> need .
>>>>
>>>> Richard Smith
>>>>
>>>> __________________________________________________
>>>> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
>>>>     
>>>
>>> __________________________________________________
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>>>   
>>
>>
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>>
>>  
>>
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