Data Logging

[John Faubion]

> My big problem (and why I want an accelerometer) in predicting vehicle
> performance is that with the Drag car the wheel diameter is not constant
> as it increases with speed and also there is no speedo for measuring
> speed against a stopwatch. Also no passenger seat for the second person
> to take the readings!

Why not mount a pair of magnets inside the front wheel and use a hall
effect sensor mounted to the brake baking plate? The rear tires may grow
considerably but the fronts shouldn't.

John Faubion
jfaubion at beaches.net