I'm using an CX racing oil cooler. 30 Row, 11 x 9 X 2
To create a Kays & London wedge shape for the
inlet, I could of used a flat stock and called it a day.
But really it's an 'S' shape to maximize equal amount of
air to flow across the rad. Plus I had to make the wedge
shape, turn into an 2.75" pipe opening for the scat
hose. I wanted to keep the bends like a trumpet, to
maximize the air sticking and following the sides
without disturbance. Could of sanded and shaped the
pieces out of foam for days and days.. Or punch them into
autocad. 3D print the parts, then fiberglass overtop
of the molds.
The last two pictures (oil4 & oil5) are how I
had to make the outlet, with foam and bondo. I couldn't
get good measurements around all the pipes and
motormounts, so I couldn't 3D draw it. Was easier this
way, to build it in place. Took 10x longer to build.
The outlet has a large 5" box to catch the expanded hot
air. Then it necks it back down to a 2.75" outlet pipe.
The idea is the speed the air back up before it exits. I
also added a butterfly valve to the outlet, to be able
to control the temps. This should help fine tune my
system (inlet, outlet, exhaust, cowl air exit), by
watching how much the valve needs to more to keep temps
stable at different flight speeds.
- Matt Boiteau