Ah... Tuf is here... LOL. The master of wrong assumptions... How did you conclude about straight line only? My response you are referring to was simply
The problem with that is accuracy, they do not account for barometric pressure, wind, rider position on the bike, etc. Also, when not accelerating, they
They've been around a long time....all you need to know is the weight of the vehicle. It does the rest.
I think there was a product which appeared a few yeas ago which would measure whatever was possible to measure utilizing accelerometer sensors. Forgot
It is absolutely funny!
However, I was disappointed when I checked, and their birthdays are all over the place. Still a good one.
Anyone tried doing this with an Iphone and "Performance Meter Pro"?
Second question (secret project maybe): If you can buy a powermeter