-------------- Original message from "Kelly Troyer" <keltro@att.net>: --------------

Chris,

   If you retain the front cooler for cabin heat and some oil cooling try "Paralleling" the

oil flow as laid out below.......Should require fewer changes (extra fittings and whatever

hose changes are required for your installation compared to switching the front cooler

to engine coolent...............

 

 As stated previously a "Y" fitting from your rear oil cooler to a "Y" fitting on the 13B

rear housing...........Connect one side of the rear cooler fitting directly to one side of the

rear housing fitting..........Connect other side of rear cooler fitting to tubing going to the

front cooler...........Connect tubing returning from front cooler to the other side of the

"Y" fitting on the rear housing...........This will eliminate any restriction from the front

cooler but should still allow enough flow for some cooling and provide for cabin heat

   IMHO............Somebody jump in here if I am having flawed reasoning !!........... 

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

 

-------------- Original message from Chris Barber <cbarber1@texasattorney.net>: --------------

Al,

 

Yes, the aluminum lines run down the left duct to in front of the canard bulkhead, so no lines are actually in the cabin.  I do not have an additional oil cooler plumbed in the engine compartment

 

I do know the system was plumbed in series, however, my ignorance prevents me from knowing why re-plumbing them in parallel would change things.  Does plumbing in parallel prevent the front cooler from being a restriction point since oil can flow past the front cooler while still filling it with hot oil for cabin heating??? Hmm, not sure how I would plumb this.

 

I understand why higher pressured hot oil in the cabin is not good, but as you and I know, the lines are not actually in the cabin.  The occupants are isolated, but I now wonder if it may just be better to use the front cooler for heating using water. That being said, it does not currently seem I need additional water cooling, but could use some more oil cooling ,thus a potential benefit of a front oil cooler.  Of course all of this is on the ground in a very hot environment....it may be fine at 100+ mph.  It is all speculation for now.

 

My mind is still trying to wrap my mind around the balance of what is "best", acceptable and no way in hell and all the shades of gray in between.

 

THANKS to all for allowing me to share and gain information.  I got some figerin' to do.

 

All the best,

 

Chris Barber

Houston

---

From: Rotary motors in aircraft [flyrotary@lancaironline.net] On Behalf Of Al Gietzen [ALVentures@cox.net]
Sent: Monday, October 05, 2009 11:14 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Seepage, no more. Oil system

Hi; Chris;

 

Seems to me the simplest approach, since you have that system all set up; is to simply connect the front oil cooler in parallel for use as your heater.  I assume you have the lines running through the left side duct per plans, so the lines are not the cabin.  That way in can still provide some additional cooling for your oil, and provide cabin heat as required. 

 

Do you already have another cooler plumbed in near the engine?  I’d recommend -10 lines.

 

FWIW;

 

Al G

 

My question to the collective is; would it be acceptable to use the aviation oil cooler that is already installed in conjunction with my currant water coolant system. My thinking is that an oil cooler, if I understand correctly, is more "durable" and able to withstand more pressure than the standard water radiator. Of course, there may be reasons other than pressure that would factor in, I just don't know them.

 

IIRC, oil pressure has been up to 75 psi, whereas stock coolant pressure caps are at about 13 and some in our uses some use 21psi caps. Thus, seemingly, this stock aviation cooler should be up to the task of being plumbed into my coolant system to provide heat for the cabin. I would think, perhaps in errors, that it should be at least as durable as a standard heater core. It would save a nice bit of time not having to redo the glass and plumbing at the front of the plane. I would like, in an ideal world, to remove the oil cooler from then nose, flush it and reinstall as a water radiator.