Mark, Tracy and Al,

Looks like you guys are using either C&R = or Fluidine oil coolers. Do these units have thermostats? If = not, is this a problem? If it is a problem, what is your solution? = I'm full of questions today!

Thanks, Ken Powell

Ken;

My cooler is a custom unit built = by Griffin. I was working with Fluidyne on a custom unit when they stopped doing = custom designs. They have some very good units, but none with the = capacity and configuration that I was looking for.

I don’t have a thermostat = in my system; but I recognize the possibility of adding one later. It = makes very little difference on warmup, because that is happening on the = ground where there is very little cooling air flow anyway (in my pusher setup). = I’d anticipate that the principal issue will be on long descents, especially = in cold weather; so I’ll wait and see when I get there. If I = see oil temps getting much below about 140 in any flight conditions, it will get = my attention.

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This solves a = riddle for me. I bought a very stout oil cooler off ebay a while back for my 20B. From the specs on the fluidyne website, it looks to be a = Fluidyne model 30716. It has a Modine sticker on the side and was = represented to be a NASCAR cooler. I had never been able to locate any oil = coolers manufactured by Modine, so I imagine it was built by Fluidyne for = Modine. It has four fittings, two on each end and is a double-pass = design. There are very fine turbulators inside the tubes. Yes, it is = heavy, but very well built.

Mark = S.

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Monday, December 20, 2004 12:52 = PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Oil cooler mount updated pictures

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-Finally, I could = find another type of oil cooler, which would be closer to the size of the = evap core. In the old archives, Mike Wills mentioned Fluidyne. I had one of their radiators in my FD, and it was very = well built. Here's a link to the oil cooler family I'm thinking = about. They look pretty good to me. What do you = think? http://www.fluidyne.com/p= l_theoc.html

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Thanks,

Rusty (waiting = for a giant estimate for replacing my dead heat pump)

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Really liked the DB 30517 (3.75" thick double pass model) Will = probably use this one on my -8.

Tracy