Peter Nunn wrote:
paul,
has anyone done any work with air/water intercoolers and oil/water
radiators. I hame having trouble fitting the plumbing for everything into
my cowling as I have a retractable nosewheel under the oil-pan of the
engine. The size of the intercoolers I have found look ok, but the read
bonus is that I do not have to try and plimb air and oil to the points
inside the cowling where I can get an airflow. I suspect with the shorter
tubing, particularly the intercooler the setup will probably be lighter as
well.
Would the rad you designed be large enough to handle the total cooling
including the oir intercooling?
regards
Power Sport is struggling with that as we speak. It will take roughly
a third larger radiator. Below is the heat balance of a Mazda rotary.
The rad I designed is untested. It is my best guess based on what we
have learned from the research and experience of others over the past
two and half years. Refresh my memory on the type
of airplane you have and perhaps I can come up with a layout for you
that will work. Do you have a stock Mazda oil cooler? It will
not take much room if mounted the long way and with proper ducting.
Paul Lamar
Peter Nunn wrote:
The aircraft is an experimental. it is a low wing all-metal tricycle with
retractable undercarriage. I have a stock oil-cooler and turbo intercooler.
The colwing has lots of room to the side of the engine but none aboe or
below the engine as the cowling line is very low at the top and the retract
mechanism is only 10mm below the sump.
I can send a DXF of the engine mount/cowling if that helps
Yes that would help. Sounds like you need two water rads one on either
side of the engine plumbed in parallel. I will have to put my
thinking cap on after I get the DXF. What version of ACAD is it?
Wait a minute. I know what you can do. You can copy Jim Rahm's
layout. Here is a picture. Intercooler and all. A is the intercooler
and B is the water radiator. Since he is using two intercoolers
and dual turbo's the same set up is on the other side. Jim uses
fans on the water rads for climb. This is the ultimate oblique
flow radiator set up. Jim is cooling 420 HP and he is going
330 MPH. Finished second behind the factory Lancair in the
NC to OSH race. Nearly beat them. No small feat.
Paul Lamar
Peter,
Here is another picture showing how far the rads go back on each
side of the engine on Jim Rahm's set up. I think I was wrong about
dual turbo's judging from the size of this turbo. He does use dual
intercoolers however. All and all this is a well thought out
installation. It has been in development for at least four or
five years with lots of money spent.
Paul Lamar
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