[DeTomaso] Cooling system hose questions

Asa Jay Laughton asajay at asajay.com
Thu May 28 23:13:23 EDT 2009


Maybe I should just mount them on the front.  As long as I have a decent 
seal around the edge, I should accomplish essentially the same thing 
shouldn't I?

Comments?

Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired

& Shelley Marie
Spokane, WA

1971 Mach I Mustang  [ASA JAY]
1973 Pantera L 5533  [ASASCAT]
    
******************************     
http://www.asajay.com
http://www.teampanteraracing.com
  



Asa Jay Laughton wrote:
> Okay, obviously I'm not communicating this correctly.  The fan blades 
> are -straight- from the center hub to the outside ring.  There is no 
> curve to them between the hub and the ring.  We'll say each blade is 
> about six inches long by about two inches wide. The blade is straight 
> along it's length.  The blade is convex, or curved across the width.
>
> Stock Pantera fan:
> http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&Itemid=57&g2_itemId=2554
>
> Note how it has a curved (convex) blade that effectively -scoops- the 
> air as the blade goes around, blowing air into the radiator.
>
>
> Now look at the dual fan assembly here:
> http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&Itemid=57&g2_itemId=2548
> http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&Itemid=57&g2_itemId=2551
>
> Note how it too has curved blades, but also note that when mounted to 
> the -back- of a radiator, in a sucker arrangement, -and- the fan turning 
> in the correct direction to suck air through the radiator, the curve 
> will not be scooping the air.  To me, this creates an inefficiency.
>
> Do the photos help?
> Asa Jay
>
>
> Asa Jay Laughton, MSgt, USAFR, Retired
>
> & Shelley Marie
> Spokane, WA
>
> 1971 Mach I Mustang  [ASA JAY]
> 1973 Pantera L 5533  [ASASCAT]
>     
> ******************************     
> http://www.asajay.com
> http://www.teampanteraracing.com
>   
>
>
>
> MikeLDrew at aol.com wrote:
>   
>> In a message dated 5/28/09 13 51 16, asajay at asajay.com writes:
>>
>>
>>   
>>     
>>> I don't mind the curve, what I mind is that it's not "scooping" the 
>>> air with the curve.  Imagine for a moment, mounting an orignal Pantera 
>>> fan on the motor backwards, so the curve is the wrong way.  It still 
>>> works if the motor turns the right way, but how less efficient is it?
>>>
>>>     
>>>       
>>>>> Scimitar fans don't work by scooping the air.   They are deliberately 
>>>>>         
>>>>>           
>> curved so that the outside of the fan blade trails the inside by several 
>> inches.   I don't understand why it's better, but it's the latest trend in 
>> propeller/fan aerodynamics.   Among other things, it is much quieter.   From the 
>> Spal website FAQ section:
>>
>> Q.    What's the difference between the straight blade fans and the curved 
>> blade fans?
>> A.     The straight blade fans provide maximum cooling for their size.  The 
>> curved blade fans sacrifice a small amount of performance in return for a 
>> much quieter fan. If noise is an issue, go with the curved blade fans.  If 
>> ultimate performance is the objective, use the straight blade fans.
>>
>> Mike
>>
>>
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