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> Why horizontal fans...
yeahmag
post Apr 11 2011, 02:34 PM
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Just curious... Why did Porsche use horizontal fans on some of its race cars?
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mepstein
post Apr 11 2011, 02:42 PM
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Just a guess but - even cooling, lower profile, easy to secure, looks cool.
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SirAndy
post Apr 11 2011, 03:01 PM
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QUOTE(mepstein @ Apr 11 2011, 01:42 PM) *
even cooling

(IMG:style_emoticons/default/agree.gif)

Equal amount of air to all cylinders ...
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Tom_T
post Apr 11 2011, 03:01 PM
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Added & more effective engine bay cooling primarily, as the 917 also had the vertical fan on the front of the motor IIRC.
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mepstein
post Apr 11 2011, 03:15 PM
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QUOTE(Tom_T @ Apr 11 2011, 05:01 PM) *

Added & more effective engine bay cooling primarily, as the 917 also had the vertical fan on the front of the motor IIRC.


? (IMG:style_emoticons/default/confused24.gif)


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URY914
post Apr 11 2011, 04:43 PM
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Dr Evil
post Apr 11 2011, 04:46 PM
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I need a wet-wipe
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URY914
post Apr 11 2011, 04:52 PM
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Gint
post Apr 11 2011, 05:17 PM
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If you think about it, what better place to put a cooling fan?

Here's a question. How did they power those horizontal fans?
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URY914
post Apr 11 2011, 05:28 PM
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The 917 had a shaft coming off the crank.

I think I have a cut-a-way drawing of one if I can find it.
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SLITS
post Apr 11 2011, 05:51 PM
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Corvair had it and used a belt drive.
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dlee6204
post Apr 11 2011, 05:55 PM
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(IMG:style_emoticons/default/smile.gif) 917 engine...

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http://www.pbase.com/917carl/917_12_cyl_engine&page=1
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ChrisFoley
post Apr 11 2011, 06:24 PM
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QUOTE(SLITS @ Apr 11 2011, 07:51 PM) *

Corvair had it and used a belt drive.

Hmm,
Porsche,
Horizontal fan,
Belt drive,
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I had (that engine in) my car idling Sunday with all the head temps within a 5 degree temperature spread.
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Krieger
post Apr 11 2011, 06:27 PM
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QUOTE(yeahmag @ Apr 11 2011, 01:34 PM) *

Just curious... Why did Porsche use horizontal fans on some of its race cars?


They suck harder! (IMG:style_emoticons/default/biggrin.gif)
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URY914
post Apr 11 2011, 06:39 PM
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JmuRiz
post Apr 11 2011, 07:15 PM
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QUOTE(Tom_T @ Apr 11 2011, 01:01 PM) *

Added & more effective engine bay cooling primarily, as the 917 also had the vertical fan on the front of the motor IIRC.

That was the 908 that had the vertical fan.
Anyone make a horizontal fan for the 911 motors? (IMG:style_emoticons/default/smile.gif). Not like it'd be in my budget anyway.
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904svo
post Apr 11 2011, 07:34 PM
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How about a type 587 fan on a type IV engine.
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ChrisFoley
post Apr 11 2011, 07:35 PM
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QUOTE(JmuRiz @ Apr 11 2011, 09:15 PM) *

Anyone make a horizontal fan for the 911 motors? (IMG:style_emoticons/default/smile.gif). Not like it'd be in my budget anyway.

There's a company in europe which makes a repro of the 962 horizontal fan.
Its gear/shaft driven off the nose of the crankshaft.

I have a horizontal fan 911 engine cooling system on my long list of products to develop, to be done sometime after I complete my Type 1 cooling system.
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Dave_Darling
post Apr 11 2011, 11:06 PM
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I believe that some of the 935s also used horizontal fans. That may have been in part to make room for charge coolers? Not sure.

They were driven by the standard belt off the crank nose, which spun a shaft with bevel gears on it that spun the fan. Lost significant amounts of power when compared to the belt drive of the 911 fan, but the extra cooling was worth it in an endurance racer. And may have allowed them to run a bit more boost...

--DD
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Type 4 Unleashed
post Apr 12 2011, 02:11 AM
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(IMG:style_emoticons/default/barf.gif) .... (IMG:style_emoticons/default/welcome.png)
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