flyrotary@lancaironline.net Mailing List Archive

Matt

I have decided to use a belly mount radiator on my tango 2. Have been dithering around for ages without making a decision - Ross's excellent articles have convinced me to go with this setup.

I have decided on 20” x 7” x either 68 mm 0r 81 mm The 68 mm (2 3/4” will give approximately 385 cubic” the 81 mm approx 455 cubic “ which is around Neil’s recommendation. I have a P Lamar designed radiator which he was confident would cool up to 250 hp (two 1/2 “ wide cores adding up to 330 cubic “ so hopefully the thinner 68mm core should be okay given the lower drag and straight through flow characteristics I am looking at around 63 “ length for the pod to improve flow characteristics - All constructive input welcome I am not sure about the best external shape! a very rough sketch is attached

Bruce

On 28 January 2021 at 12:07:13, Matt Boiteau mattboiteau@gmail.com (flyrotary@lancaironline.net) wrote:

Ross does the SDS EFI system and did 2 videos on cooling his Subaru engine.

https://www.youtube.com/watch?v=GGXXEgqhmmc&ab_channel=rv6ejguy

It seems him and Tracy agree that we need a thicker core, then the 1" Paul L kept on suggesting. My coolant rad is almost as wide as the plane with the 1" truck core.

I'm definitely not happy with my cooling setup, but needed to get moving and finish the plane. Can sit around all day talking about it, or start with something and get better in time. I'm done the flyoff hours in FL and hoping to bring the plane back to Canada in the spring where I can tinker with it then. 3D draw things out and get suggestions from people then.

What do you guys think of a belly mount coolant rad? How would we plum the exhaust out of the way? Keep oil coolant in the cowl? Or Below the engine?

- Matt Boiteau

Attachment: IMG_0215.jpg

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