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Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #247419 is a reply to message #247408] Mon, 14 April 2014 17:54 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Les,

As noted earlier Shan Rose (Duce Apocalypse) was the GMCer that installed two Thunderbird fans. AFAIK Shan has left the building.

I checked and his last message was back in June of last year.

His last message regarding the fans was in August of 2011.

I remember that when Bill Bryant noted that in all the years he had owned his GMC he never had a problem Shan got quite belligerent
with him.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Les Burt
Sent: Tuesday, April 15, 2014 6:28 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Oh, Sure, Another Fan Clutch

The hefty output of 150-200a that I mentioned was in reference to alternator output. If you add the 60a of an electric fan to all
the other alternator loads that can be found on our coaches, a 150a alternator isn't going to leave you with much spare change. Not
to mention the belt drive requirements such an alternator will require.

A dual Supercoupe fan set-up certainly sounds as though it has potential, but Shan has indicated that he wants to try a
purpose-built single fan set-up. This tells me he isn't completely satisfied with the results he obtained.

Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress



On Apr 14, 2014, at 2:15 PM, A. <markbb1@netzero.com> wrote:



gmc.les wrote on Mon, 14 April 2014 13:06
> Patrick,
> A very interesting example that brings a few thoughts to mind.
>
> Moving air with a fan takes horsepower, the higher the air flow being moved, the higher the HP consumed. I don't have exact facts
to quote, but I do believe that the OEM fans on our coaches consume several HP because of the air they need to move. Trying to
produce the equivalent airflow with electric fans is going to require a fairly hefty electrical output (possibly 150-200a?)...
A working system has been documented to draw 60 amps, and required an alternator upgrade to support the extra load.

http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&goto=140931&rid=2083#msg_140931
--
'73 23' Sequoia For Sale
'73 23' CanyonLands For Sale
Upper Alabama

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
 
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