Mailing List flyrotary@lancaironline.net Message #42462
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] Cooling sytem changes- Velocity 20B
Date: Wed, 23 Apr 2008 17:11:07 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

    Beautiful installation (normal for you).........Just by chance I have an

oil/water cooler exactly like yours in my part collection that I purchased

from "Aeroquip" a few years ago just in case I needed it !!..........<:) It is bound to work on a 13B if it helps your 20B

 

Kelly;

 

Be aware that these units are limited by the water-side heat transfer.  MoCal sells a flow restrictor (about $5) which forces more flow through the annular passages that are in close contact with the boundary between oil and coolant.  Since I’m only putting about half the coolant flow through that cooler I put in the restrictor which significantly improves the performance.  If your planning on full flow, you would want to check the pressure drop curves before putting in a restrictor.

 

I estimate that in my installation the oil/water cooler is handling about a third (or less) of the total oil heat load.

 

FWIW,

 

Al

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