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Hi Bill,
Here is the coolant flow through the engine. Pretty much as you have
envisioned it.
I sent this to the list a few days ago. The water flow down the cool
side and top, then to the heater port. the rest flows back on the hot
side and bottom.
On Sun, 13 Sep 2009 12:24:10 -0400
"Bill Bradburry" <bbradburry@bellsouth.net> wrote:
> Lynn,
>
> You sent that drawing some time ago during a previous discussion on cooling.
> My system is set up very similar, but I wonder what the effects of the
> differences might be.
>
> I don’t have a swirl pot, but the cap on the radiator is like in your
> drawing where it doesn’t seal for pressure. Another difference is that my
> radiator is a double pass, so the radiator cap is after the first pass of
> the radiator. You don’t show where you come in with the air bleed from the
> top of the front iron. Mine comes in just under the radiator cap. This
> allows the air to move into the make up bottle quickly. But the down side
> is that whatever coolant comes thru that ¼ inch line bypasses the first pass
> of the radiator and only goes thru the last pass. However, I think that
> this coolant has only made one pass thru the engine as well.
>
> ( I have no clue how the coolant flows thru the block, but I think it goes
> down one side and back up the other side to the water pump???) I would like
> someone to set me straight on this coolant flow thru the engine. There are
> two outlets, this one and the heater supply that come off the front iron.
> They must somehow only get contact with half the engine since the water pump
> is on the other end of the engine. ???
>
> Bill B
>
>
>
> _____
>
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Lynn Hanover
> Sent: Sunday, September 13, 2009 10:33 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Cooling Plumbing
>
> You need some kind of header/expansion tank in sys. with aprox 4 to 8 square
> inches of air, allows sys. to pressurise more easily & maintains a steady
> pressure. David Cook RV6A Rotary.
>
>
>
> Here is one system that works perfectly and has since 1980. For Mazda before
> that. The swirl tank idea comes with the instructions for each New CosWorth
> race engine. The restrictor idea is mine. The pressure cap only on the make
> up bottle (and the actual bottle in my case) is the stock layout from every
> RX-2 and RX-3 imported to the USA. The swirl pot is not required, it just
> works very fast, and my system is apart often. So I use it.
>
>
>
> The tube to the bottle comes off of the radiator in the cars. In the
> airplane it would need to come from the location where ever air would likely
> collect. In most cases, the highest part of the water pump outlet, or the
> top of the rear iron. With the engine dead level in the racer, this system
> removes all of the air in 2 heat cycles. The fluid level must be replenished
> twice. I keep the bottle about 1/3 full to allow 2/3 to be compressible air.
> It is an accumulator just like big airplanes, and big heating systems and
> boilers.
>
> No need to reinvent the wheel.
>
>
>
> Lynn E. Hanover
>
>
>
>
>
>
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
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