the water would be traveling at 628 feet per minute at that flow rate.  That is over 7 miles per hour!

That doesn't sound unreasonable to me.  I'd take more if I could get it.  My 20 B only has 1" water lines.

Tracy

On Wed, May 12, 2010 at 12:34 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:

Al,

Are you sure of the 40 GPM?  That seems like a lot.  My radiator in/out is 1.25 inches, so the water would be traveling at 628 feet per minute at that flow rate.  That is over 7 miles per hour!

 

Bill B

 

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From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Wednesday, May 12, 2010 12:24 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: alternative water pump

 

Will the Renesis pump capacity pump enough water to cool a 350 hp 3-rotor.  Who knows?  Frankly, I don't even know how much flow we're talking about here.  For safety sake, if a better impeller was available, I would most likely buy it.  

 

Mark;

As a point of reference; 260 hp, and 30 degree delta T needs about 40 gpm. You can scale up or down from there.  At 6000 rpm I’m guessing the pump will give you that, but of course depends on the delta P around the loop.  If you’re expecting 350 hp, things might be marginal; basically higher delta T, which reduces overall effectiveness of the system a bit. But if you have some excess capacity there - - I guess you’ll find out.

Al G