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The Oil Cooler has now been fitted, which has been mounted
with Mini Cooper shock mounts to reduce fatigue on the
fragile
matrix. I have at this stage some small doubts about
whether the cooler is large enough for the job, this
will be something that I will check later.
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After a bit of
consultation/ advice with Dino, I have decided to take
the oil from the magnetic debris pick up port,
then to the filter/ oil pump, on to the oil cooler and
back in to the gearbox via the port where the gauze
filter originally was fitted (as shown).
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Hmm I hear you say. Hmm I say myself.
At least it will let me run the engine a little longer
than 5 minutes.
I feel a more substantial fan system will need to be
found, it seemed a good idea at the time. The Fans switch
on when the oil pump is activated.
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I made the battery
holder today which is a pretty much a universal design.
The 2 heavy duty wires at the front give me 24volts for
starting, the small fused wire at the rear left gives
me 12volts. The quick release connector on the right
is
for easy charging
or connecting to Molly which
will save the Kart's battery's when starting.
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The Tacho
has now been fitted and this makes the
control panel complete (for now anyway). I have configured
the readout to display 'percent' rather than Hz. At
a later stage a EGT gauge may be added along with a
volt
meter.
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View of the magnetic pickup. |
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A FOD guard
has been fitted which was made from a flour sive which
cost 99p from Charlie's in Shrewsbury, What a bargain!
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Whilst waiting
for the nozzle to be fabricated I thought I would see
how much thrust the JFS produces
without it. After the unfortunate hot start it can be seen
to produce about 35Lbs of thrust.
To view the video Click
Here.
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Today I fitted
the nozzle which as always, was fabricated by my mate
Tim. As you can see by the blueing I had a sneaky
test run. The thrust was impressive, but I do feel more
can be had. Time to get my thinking cap on for a nozzle
re-design.
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The idea was
to try to make the gas flow as smooth as possible when
it leaves the turbine wheel.
With this design there are no sharp edges as the curve
of the turbine stator make for a steep but fairly efficient
gas flow. I'm sure this design can be improved on
by reducing the jet pipe to the same diameter of the
outer edge of the turbine wheel.
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