Mailing List flyrotary@lancaironline.net Message #53304
From: Bobby J. Hughes <bhughes@qnsi.net>
Subject: RE: [FlyRotary] Re: Fw: Water temps
Date: Sun, 19 Dec 2010 20:14:25 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al,
 
The only pressure charts I have found are for the coolant. Nothing for the oil. Do you have a link?
 
Bobby


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Sunday, December 19, 2010 7:18 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fw: Water temps

I have the A43-330 MoCal. Plumbed on the outlet of the rad where the coolant temp may typically be 160F at high power and the oil temp (at engine out) may be 220; and it handles roughly 30% of the oil heat load on the 20B.

 

Be aware that this cooler; like any off-the-shelf unit, is designed for the lower oil flow rates of piston engines. I’d not recommend plumbing this for full flow from the rotary unless you are willing to accept 20-30 psi pressure drop. 

 

Download the performance charts – these are not high capacity units

 

Al

 

 

Subject: [FlyRotary] Re: Fw: Water temps

 

Chrissi,

    I did not see an answer to your question about "Mocal" water to oil coolers...............It has been

reported previously that some have used the "Mocal" model A43-330 cooler with success........

   Some have had custom units built by Ed Klepis at  "Tech -Weld" or other suppliers........... I have

had a 330 for some time but alas I am still grounded !!.............<:).........See PDF below.......... 

 

 

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

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

"TURBONETICS"_TO4E50 Turbo

 

 

 

 


From: "CozyGirrrl@aol.com" <CozyGirrrl@aol.com>
To: keltro@att.net
Sent: Mon, December 13, 2010 12:52:06 PM
Subject: Re: Fw: [FlyRotary] Re: Fw: Water temps

This is where I get confused:

 

said previously,

-ideal water temp = 160*~180*F

-ideal oil temp = 160*F

 

If we are cooling oil with water that is at best hotter than the ideal temp of the oil, then are we not adding heat to it rather than removing it?

 

If we are trying to cool oil, why would we feed the highest temp water to the oil/water cooler rather than the coolest temp water by tapping into the pump housing where it enters the block?

 

Based on feedback, the water entering the block may be as low as 150*~160*F, would this be cool enough to do an adequate job of cooling the oil?

 

Also, which model of Mocal is being used?

 

...Chrissi

 

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