|
Test method is still same. Average measured from start to A B directions. Results are in same order of magnitude already at the middle of test leg. If you calculate results from 4th measuring point you would get up 17.68kWh vs 18,3 kWh and thats 3,4% difference.
If you calculate results from second point up would be 14,38 vs down14,91-->3,5%
Again if you just measure the end point average consumption you dont see what migth cause the changes in results if there is any. Thats why in formulas you measure speeds all around the course to see more.
Outside temperature have been more stable in the past days from 12-17, but still the tarmac gets hotter and wind conditions change. Just by testing with this short about 5km long route testing took total of 1.5 hours. How do you keep the tests variables constant in longer tests if I am able to see changes when temperatures change 0,5 celsius?. When I end the test I could see wind is already much more than in the start when it was dead still. If you plan to do testing with electric car same setup in this car 3+3 AB test runs max test legth would be around 20 km to one direction which is 350km in range. When you test with longer distances the other cars will ruin some of your results. Here we don`t have 2 lane roads to pass other cars and if they pass you they still ruin your results as cruise control will brake to keep safety distances to obstacles in front.
I really don`t see any benefits to test on longer routes than is necessary to see the differences. At the moment this length seem to work fine. Target of these tests is to see if new aero parts work better or not. If better you keep them if not you take them out. Same principle as with business fail fast and more results you will get. yesterday evening best results compared to 2 month old results in the +5 celsius weather was 10,3%. Temperature raise effect +15 celsius is 2,7% of that.
Wheel angles will be checked and adjusted today afternoon.
Next is coming again some tire testing. I am currently running the oem tires. Will test the same winter tires in 195/55r20 which were better on previous test, but i also have same wheel set coming with summer tires. The cooling holes will be blocked in the best tire setup.
|