[Public-List] Standard Prop Size and Pitch

[Lawrence Morris]

Everyone,

Thank you for your responses to my enquiry.  The reason for asking is  
I have a customer with a A30 that is considering re-powering his boat  
with an electric drive system.  I needed to tell the manufacturer the  
existing prop size and pitch and more importantly the aperture size so  
they can specify a prop that will fit the power curve of the electric  
motor in the available space.

It is a really interesting system that utilizes a 24v DC electric  
motor connected directly to the prop shaft with no transmission.   
reverse is accomplished by reversing the polarity in the circuit.  The  
motor is a little larger than a basketball and weighs approximately  
50kg.   The motor will charge the battery bank by free wheeling the  
prop while sailing.  Other charging options are shore power, solar and  
an aux. genset.  My customer is in a marina and has shore power  
available for primary needs and will add solar panels to supplement  
while cruising.   The battery bank consists of a series of 8D  
batteries. We are still determining how many will be required to meet  
my customers needs.  more batteries the greater the range.  When we  
have it all fleshed out I will share the specifications with the list.

Regards,

Larry

On May 20, 2008, at 6:11 PM, MMasstransit at aol.com wrote:

> I  would   contact  Indigo   Electronics  (do  not  let teh  name   
> fool
> you)  they  make  a great  3  bladed  prop   that  works   
> beautifully on  my
> Bristol  (oh   yeah)  30  with  an  atomic  4
>
>
> In a message dated 5/20/2008 2:01:11 P.M. Eastern Daylight Time,
> morris.lc at verizon.net writes:
>
> Yes, You  assumed right.  This Time!!!
>
> Larry
>
>
> On May 20, 2008, at  11:38 AM, Mike Lehman wrote:
>
>>
>> I assume (always a dangerous  thing) that 'standard' means an A30
>> with an Atomic 4 as shipped  by Whitby when the boat was new. If the
>> boat was re-powered,  then a prop calculation should be done to
>> detemine the proper  size and pitch.
>> Mike Lehman
>>> <((((ｺ>`ｷ.ｸｸ.ｷｴｯ 
>>> `ｷ.ｸ><((((ｺ>`ｷ.ｸｸ.ｷｴｯ`ｷ.ｸ><((((ｺ>
>>> From: MMasstransit at aol.com> Date: Tue, 20 May 2008 11:26:15 -0400>
>>> To: public-list at lists.alberg30.org> Subject: Re:  [Public-List]
>>> Standard Prop Size and Pitch> >  Strictly based on engine and water
>>> line etc. > > >  In a message dated 5/20/2008 11:22:09 A.M. Eastern
>>> Daylight  Time, > morris.lc at verizon.net writes:> > Anyone know the
>>> standard size and pitch of the Alberg 30 propeller?> > >  > > >
>>> **************Wondering what's for Dinner  Tonight? Get new twists
>>> on family > favorites at AOL  Food. >
> (http://food.aol.com/dinner-tonight?NCID=aolfod00030000000001
>>> )> _______________________________________________>  These
>>> businesses support your Association:>
> http://www.alberg30.org/store/A30supporters.html
>>>> Please  support them.>
>>> _______________________________________________> Public-List
>>> mailing list> Public-List at lists.alberg30.org>
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>> _________________________________________________________________
>> Make  every e-mail and IM count. Join the i知 Initiative from
>> Microsoft.
>> http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_
>> MakeCount
>> _______________________________________________
>> These businesses  support your Association:
>> http://www.alberg30.org/store/A30supporters.html
>> Please support  them.
>> _______________________________________________
>> Public-List mailing list
>> Public-List at lists.alberg30.org
>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>
> _______________________________________________
> These  businesses support your  Association:
> http://www.alberg30.org/store/A30supporters.html
> Please  support  them.
> _______________________________________________
> Public-List  mailing  list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>
>
>
>
> **************Wondering what's for Dinner Tonight? Get new twists on  
> family
> favorites at AOL Food.
> (http://food.aol.com/dinner-tonight?NCID=aolfod00030000000001)
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org


 1211335444.0