<VV> Fan and Shroud

[Ron]

GM provided enough flow for an Ultravan to cross the country without any 
problems.  What did you expect, cooling for a military tank?
RonH

----- Original Message ----- 
From: <ScottyGrover at aol.com>
To: <hmlinc at sbcglobal.net>
Cc: <virtualvairs at corvair.org>
Sent: Thursday, May 17, 2012 3:17 PM
Subject: Re: <VV> Fan and Shroud


> Actually, the diagram shows the bolt pattern and spacing for an EM fan, 
> but
> it will work on a LM unit.
> The uneven spacing has to do with harmonics, which would affect the noise
> level. GM didn't give  a d**n about flow, just to make the Mag unit light
> (for belt life) and cheap.
>
> Scotty
>
> .
>
>
> In a message dated 5/17/2012 11:42:17 A.M. Pacific Daylight Time,
> hmlinc at sbcglobal.net writes:
>
> Well,  that was much more than a mere picture.  The diagram shows (I
> assume)
> a late model fan with 24 blades (vanes) evenly spaced.  The magnesium 
> fans
> have 11 blades and are not evenly spaced.  I know nothing about  fan
> technology, but now wonder if the spacing has anything to do with air
> flow.
> I've always assumed that the uneven spacing had to do with harmonics  and
> noise level.
>
> Later, JR
>
>
> ----- Original Message -----
> From: <ScottyGrover at aol.com>
> To:  <virtualvairs at corvair.org>
> Sent: Thursday, May 17, 2012 9:37  AM
> Subject: Re: <VV> CHT Re: valve seats and "Ping"
>
>
>>  try this one
>>
>>
>> In a message dated 5/16/2012 3:17:00 P.M.  Pacific Daylight Time,
>> hmlinc at sbcglobal.net writes:
>>
>>  Got  pix?
>> Later, JR
>>
>> ----- Original Message -----
>> From:  <ScottyGrover at aol.com>
>> To:  <virtualvairs at corvair.org>
>> Sent:  Wednesday, May 16, 2012  4:49 PM
>> Subject: Re: <VV> CHT Re: valve seats  and  "Ping"
>>
>>
>>>I have designed a series of fans for the  purpose of  improving the air
>>>flow
>>> through a  Corvair's engine. the problem with  any of the factory stock
>>>  units
>>> is  that there is too  much space between the fan  and the upper shroud
>>> (turkey  roaster)  which allows air  to go back by the fan (the 
>>> technical
>>> term
>>>   is"reversion.")  my latest fan design involves a fan with blades 
>>> which
>>> rise  up
>>> into the airstream and a "fan  ring" which  fastens to the turkey 
>>> roaster
>>> and
>>>  which minimises the gap  between the fan and fixed-position parts.
> This
>>> allows less air  to revert over the fan blades, keeps  the air and the
>>> pressure going  through between the fins  where it belongs.
>>>
>>> Scotty from   Hollyweird
>>>
>
>
> _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are 
> the property
> of the writer, please attribute properly. For help, 
> mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America, 
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options: 
> http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________
>