<<  Jeff Spitzer

 What do you mean MY system???? It is exactly how Mazda does it. The filler
neck
 just happens to be the highest place in the system. BUBBLES RISE! Just like
in
 the car. Any car. Remember, the rad is under the engine. Where are you going
to
 put YOUR tank? Try the top of the rudder :-) If you have room over the engine
 such as in an RV4 or a pusher go for it. Most low cowls have no room above
 the engine for such a tank.
 

Well, Jeff, It's my system because I stole it fair and square just like
everyone else. I am unaware of the Mazda model that was equipped with the
separator tank. 

I think there is a misunderstanding here Lynn. I know of no Mazda models with a
separate
high pressure separator tank. The first gen RX7 have the caps in the top of 
the rad. The second gen and I think the third gen have them in the pipe coming 
out of the water pump from the block after the thermostat and in the hose 
on the way to the top of the rad.

The recovery bottle is indeed a Mazda, as I pointed out. You
will be happy to discover that the volume of a cooling system changes with
engine load. At high power/heat the coolant expands and any trapped bubbles
are driven through the small hose from the top of the separator tank to the
bottom of the (stock Mazda) recovery tank. Within a few seconds of a power
reduction a slight reduction in coolant volume will recover only coolant from
the tank. The key element to maintaining the function is the air in the
makeup tank above the coolant. If you maintain that air column the system
works. I have a schrader valve installed in the (stock Mazda) makeup tank so
I can pre charge it to 7 pounds before I start the engine. You don't have to
it just works faster after the system has been open, if you do. The air acts
as a spring to drive coolant back into the separator. Mazda stole that from
pre W.W.II aircraft cooling and hydraulic systems. It's called an
accumulator. The tank is drawn in that location only for clarity. The actual
location need only include the shortest possible hose length form the
separator to the recovery bottle. The longer the hose, the slower will be the
purging process. My bottle is mounted on the passenger footwell, 5 inches
above the ground and has about 4' of hose. It works just fine. And it was a
nice picture wasn't it?
Lynn E Hanover

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org