AussieJester wrote:Please remove my information it is not even close to accurate anymore as I have changed my gear ratio....if I remember I will input new data...Thankyou.
Done. Would love to see your new figures.
SamTexas wrote:Suggestions: To make better sense of the survey results, more detailed info are needed: Weight (rider & bike), terrain (flat, hilly and how hilly), route (city or country), tires (slim or fat, smooth or knobby). On the power vs speed, let the user both speed and watts, not just watts. I happens to have data at 22mph, so I had to extrapolate to arrive at power at 20mph. Need to specify whether the power used is pedal assisted or not.
amberwolf wrote:the problem with any kind of efficiency comparison--it's nearly impossible to make one unless all the vehicles are run on the same course at the same time under the same conditions, as there are so many variables that affect this.
You're both right. I was limited to the way I could build the survey. Being limited to only a few speed selections is not ideal but I was limited by the tools and my skills. Just allowing MPH and KPH figures was tricky
I didn't want to make the survey too long to complete by asking for every minute detail. I'll bet atmospheric pressure plays quite a big part in air resistance and would be just as valid as tyres or even tyre pressure but asking for atmospheric data would likely have drawn a blank. So really what I'm saying is that yeah there are loads of variables, so many we might as well just think of them as white noise. As we get more data we can already see that there is a middle ground developing where most bikes lie, and only a few bikes on the extremes. Some bikes will be extreme in performance (like KF and Doctobass), others will be extreme due to poor setup. It allows people to see which they are and maybe help them find ways to improve. Already it has been useful for me when looking at my own bike's performance.
To be honest I'm more interested in the larger trends such as:
How big are people's batteries?
How fast can people go?
Can we see if higher pack voltage results in better efficiency?
Are DD Hubs more efficient than RC?