Mailing List flyrotary@lancaironline.net Message #53077
From: Kelly Troyer <keltro@att.net>
Subject: Re: [FlyRotary] Re: Renesis Improved Waterpump
Date: Fri, 26 Nov 2010 00:53:04 -0800 (PST)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Andrew,
   Someone on the list will correct me if I am wrong but the way I understand cavitation is that
the impeller is turning so fast that a slight vacuum is formed at the blade tips and they no longer
are picking up water (or as much water) and pressure and flow is reduced much like when the
tips of a propeller begin going sonic in air and it loses thrust.......... 
 

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo




From: Andrew Martin <andrew@martinag.com.au>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, November 26, 2010 2:28:52 AM
Subject: [FlyRotary] Re: Renesis Improved Waterpump

Kelly

I imported one of those pumps for my Renesis a couple of years ago as my engine arrived without an OEM pump, and it just looked so much more like a pump should, maybe in a few months I may start the engine and be able to report its effectiveness.
Am I right in assuming the only problem with pumping coolant fast is in the HP consumed? and cavitation is more a result of the heat exchanger being unable to flow as fast as the pump?

Andrew
Western Australia


On Fri, Nov 26, 2010 at 12:16 PM, Kelly Troyer <keltro@att.net> wrote:
Group,
 
    Renesis waterpump with improved impeller for more efficent flow and cavitation resistant at high rpm...........A little
pricey but Christmas is coming !!.......................<:)
 
The purpose of the pump is to improve on Mazda's design since we are able to precision hand build each unit and have vast experience with rotary engines being raced amid torturous conditions (Having raced and won at 12 hours of Sebring, Daytona 24 hour, 24 Heurs du Mans and won multipe championships). What our pump does is move a greater quantity of water out of the block quicker (As allowed by the thermostat) to be exposed to the cooling elements. This is accomplished by superior design. We start with brand new water pumps from Mazda and install our impeller that we've designed. Our impeller moves more water and prevents cavitation by having much tigher clearances (To every surface), helical shape, closed back and conical introduction. Our design is reminiscent of that used on the R26B 4 rotor engine and does not require any under drive pulley to slow it down.
 
http://www.mazmart.com/remedy.html
  

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo


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