flyrotary@lancaironline.net Mailing List Archive

Yes. All coolant flows through the exchanger. I have added a half size (tech welding) oil to air cooler in series with the Lamanova. I estimate I'm cooling about 250-255 HP on take off and initial climb. That's at 40" MP and includes the HP required to drive the super charger. I also have 800 cubic inches of water radiator. I think a normally aspirated two rotor would be fine with 650 cubic inches of radiator and the large Lamanova. I have not flown enough with the new oil to air cooler to collect any data. However I can report the Lamanova performs better with the hottest oil and coolest water. I tested the oil to air cooler plumbed in series before the Lamanova with poor results. I also tested the two exchangers in parallel. But my duct was really poor and I did not have a good way to regulate flow between the two coolers. I may try this arrangement again with my new duct. I'm still working on fiberglass but hope to be back in the air in January.

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer
Sent: Sunday, December 19, 2010 6:33 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fw: Water temps

Bobby,

Then your ECD54-32 is plumbed in series between radiator and engine rather than paralleled

with partial coolant flow ??

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

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

"TURBONETICS"_TO4E50 Turbo

From: Bobby J. Hughes <bhughes@qnsi.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sun, December 19, 2010 6:22:29 PM
Subject: [FlyRotary] Re: Fw: Water temps

Kelly,

My guess is the A43-300 will provide about 30-35 F Delta T. My ECD54-329 (the largest unit) provides a maximum 43F oil temp drop. This is plumbed after the radiator using the coolest water. It did not do as well using warm water out of the engine.

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer
Sent: Sunday, December 19, 2010 3:13 PM
To: Rotary motors in aircraft
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..........

http://97.74.103.94/files/laminova.pdf

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