Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Doctorbass]

benswing, your data are very interesting too. According to my Wh/km tests and graph I made with my 2011 DS on street tire, your consumption was about 57Wh/km at 45mph. You said you did 90miles ( 144km) wich would correspond to about 8.0kWh energy and this correspond very closely to the measured battery max energy!!

now for your 114 miles ( 182km)

here is what I calculated:

8.0kWh/182km = 43Wh/km

At that efficiency, your speed should have been about 53km/h . Is it the speed average you had?




Doc

[benswing]

doctorbass, that sounds about right.  Unfortunately I didn't track the 114 mile trip as well as my 105 mile trip, but I definitely spent quite a bit of time at slower speeds and 53km/hr (33mi/hr) seems accurate to me. 

There is even more detailed description of my 105 mile ride at http://www.greencarreports.com/news/1077745_can-a-2012-zero-s-electric-motorcycle-really-cover-100-miles.  (The more interesting data is near the end.)  I used the Cyclemeter app on my iPhone to gather this data.

Am looking into getting a cycle analyst to gather more data.  I love data!

[Doctorbass]

This is really interesting to have also a video to show a real test range for the 142 miles!

What is relaly helping with the cycle analyst is that instead of counting  just the Ah, it also count the Wh wich is more accurate since the Wh also take account of the voltage decrease for wach Ah  as the battery dishcharge. in fact the first Ah spend on a full  battery worth more energy than the last Ah. The first Ah worth about 75Wh ( 75V x 1Ah) and the last Ah worth 56Wh (56V x 1Ah).. so  planning a trip so that you plan to count the Ah and return at half distance by taking account of the Ah is wrong. the first half of 120 to 60Ah give more energy than the 60 to 0Ah from the battery so if you travel and decide  to return to your home  when you get 60Ah left, you will not have enough energy to return... but knowing that the battery have 8000Wh total usable, if you return when your battery is at 4000Wh.  At 50% battery energy, it is at 4000Wh left , the Ah is not at 50% but maybe 60% left.

The cycle Anlayst is a very nice tool to install on the Zero. it also calculate the Wh/km live.

Doc

[grindz145]

That's freaking awesome doc!

You know what I find interesting is that the curve isn't even really that steep at 100km/h. I'm interested to see what happens >100km/h. I believe this really starts to trend upward quickly!

Thanks for the graph though doc, I'll be referencing this for sure!