While weather is bad and Switzerland suffers from record high rain water levels, the Formula Student “julier” team was testing their race car this week-end after the rollout. This time to test the 4WD with more torque. Plus water-resistance ;-). So here are impressions, pictures and a video from this week-end:
Summer should have started, but instead it is raining, cold and snowing in the upper areas:
The runway of the Alpnach airfield: wet, wet and wet. Overnight it had even more rain with parts of the area under water :-(.
What I mean with ‘under water’ is this:
Luckily, the water was not as high on Saturday in Alpnach, so it was possible to race under wet conditions.
Safety first: Fire extinguisher for the test drive:
Checking the system and going through the check lists:
Right back wheel motor with white cooling fluid tubes:
Left Back Wheel Motor and suspension system:
Cockpit with LCD Display. On the left status LED’s and on the right push buttons to enable/disable functions like Traction Control or Recuperation:
HV (High Voltage) and LV (Low Voltage) switches with Ground Fault Detection (GF):
For safety reasons, special isolation gloves are used to turn on the system, and the wheels are off the ground for a first system test:
Check list check and going through the test plan with the pilot:
Video of one of the test runs:
Happy Racing 🙂
So the wheel motors look like they are 1/2 or more unsprung weight?
How much do the motors weigh?
Does it have any normal friction brakes or is it all dynamic braking from the motors?
I don’t know the unsprung factor, but this is much less of a concern because this is a race care on even terrain, and not a ralley car ;-). The motor is 5 kg with a power of 35 kW. It has normal frictional brakes in addition to the dynamic braking. See as well http://www.amzracing.ch/en/media/news/20130218
That’s amazing! If I did the math correctly, 35kW = ~ 47PS.
So in only 5 kg you have the same power as a 100 kg VW Kaefermotor!
(ignoring the massive batteries)
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