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