Topic: Dont forget your extra battery when it's cold and wet outside :-)

[Karl]

Although we had already worked this out on the last Horsham run, I read this on the BVS website ;


The weather has more effect on power usage than many realise.

Rain significantly increases rolling resistance, largely due to the energy needed to deflect surface water away from the tyre contact area. However, aerodynamic drag is lower when it's raining, as humid air is less dense than dry air.

Similarly, power usage in cold weather will be significantly greater than in warm weather, due largely to increased aerodynamic drag due to increased air density.

We all suffered a drastic loss of range during the Horsham run , so I don't think there was much benefit from the reduced aerodynamic drag