[DeTomaso] Cooling system hose questions

[Thomas Tornblom]

One thing against pushers is that if the blades are flexible they might 
run into the radiator at high speed, destroying the radiator.

Why would you lay the radiator down if you have the fans in front of the 
radiator? I believe the reason for a lay down arrangement is mainly for 
space issues with sucker fans.

Thomas


Julian Kift skrev:
> I don't have access to photo's right now, but if this is a Flexalite unit the 'pusher' and 'sucker' applications are two different and distinct part numbers.
> 
> Julian
> 
>> Date: Thu, 28 May 2009 20:13:23 -0700
>> From: asajay at asajay.com
>> To: detomaso at realbig.com
>> Subject: Re: [DeTomaso] Cooling system hose questions
>>
>> 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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