The ZAP Alias Electric Car

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Posts Tagged ‘wheeler

ZAP Alias Electric Car in the X PRIZE / Consumer Reports Skidpad Test

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We have hours of footage from the X PRIZE, but this is one of my personal favorites I’ve been saving for a cold winter day. This is the Skidpad test on which Consumer Reports tests all new cars.

According to Wikipedia, a skidpad or skidpan is a large, circular area of flat pavement used for various tests of a car’s handling. The most common skidpad use is testing lateral acceleration, measured in g.

The test is carried out on a circular track with a calculated radius. A car driving on said track is slowly accelerated until the outermost tires on the car begin to slip. Going any faster would cause the car to drive outside the 300 ft radius. At this point, the speed of the car is recorded, and given the centripetal acceleration formula, v²/r, a car’s handling in terms of lateral gs can be derived.

To pass the test, the Alias had to surpass 40 MPH to achieve a lateral acceleration of .7 g without losing control. As you can see, this was a piece of cake for the Alias and X PRIZE posted a result of .85 g, not bad considering Al Unser Jr. was just getting started when they called him in. None of the X PRIZE cars in the Knockout Stage had a problem with this test and it was dropped for the finals.

Thankz to ZAP Alias Team Member Prashanth Radhakrishnan for capturing this raw video, which was posted originally on Facebook in June.

ZAP Alias 0-60 Acceleration, 60-0 Braking Test in #PIAXP Knockout Stage at MIS

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The 0-60 acceleration and 60-0 braking test is pretty straight forward for the ZAP Alias in the Progressive Insurance Automotive X PRIZE Knockout Stage. The only problem is that Consumer Reports told Al Unser Jr. he was going 57 MPH when the Alias hit the sensor pad for the braking test. What does he do? The next time Al makes sure he’s over 60 MPH by aiming for 70 MPH at the sensor pad and the Alias still stops before the cones.