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Author Topic: Reasonable efficiency in watt hours per mile  (Read 5694 times)

steven_first

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Reasonable efficiency in watt hours per mile
« on: May 06, 2015, 04:52:43 PM »

So I have about 500 miles on my 2015 FX and have been messing around with a windscreen and some basic riding techniques and drive modes.  Before I put my windscreen on I was averaging about 75-85 wh/mi at an average of 40mph.  Now with my windscreen installed and being tuned it I am getting around 60-70 wh/mi at the same average speeds.  This is great as it shows what just a little aerodynamicals can do for efficiency!  My problem is that I have no idea if this is a good number or not so great.  I would like to see what other people's average watt hours per mile is (with average speed).

One thing I did not expect was that using the same MX style helmet that tried to rip my head off from the wind at 65mph was able to increase my efficiency with the new windscreen due to the visor acting as a second wind deflector!  If I tuck a few inches wearing this MX helmet I lose almost all wind noise and my efficiency change to 55 wh/mi.  Using a standard round helmet I can only get about 70 wh/mi!  Again though, I have no idea if these are good numbers or not....any input is good input. 8)
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protomech

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Re: Reasonable efficiency in watt hours per mile
« Reply #1 on: May 06, 2015, 06:00:18 PM »

Those numbers seem pretty good. I assume the energy is as reported by the dash (likely Wh going into the motor controller), not AC energy consumed to recharge. Important to make sure everyone is talking about the same type of energy!
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steven_first

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Re: Reasonable efficiency in watt hours per mile
« Reply #2 on: May 06, 2015, 06:11:49 PM »

Those numbers seem pretty good. I assume the energy is as reported by the dash (likely Wh going into the motor controller), not AC energy consumed to recharge. Important to make sure everyone is talking about the same type of energy!

Yes this is driving not charging and I am getting the info from the dash. 
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Tater McTatums

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Re: Reasonable efficiency in watt hours per mile
« Reply #3 on: May 07, 2015, 12:38:13 AM »

I believe my lifetime average on my 2014 SR over 1,500 miles is 166wh/mi. I haven't taken a screenshot from the app recently and I didn't ride to work today so I can't get the exact number for you. My commute is almost entirely all highway and I'm usually going 70+ mph. Plus I didn't buy the SR to see how far I can travel on a kW. I bought it so I can do full throttle launches, while grinning like an idiot, pretty much every time I come to a stop.  ;D
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Cortezdtv

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Re: Reasonable efficiency in watt hours per mile
« Reply #4 on: May 07, 2015, 01:08:56 AM »

Mine is 88w per mile in a fx but I couldn't tell you average speed, but 1/4 was done on one wheel

And that was in a big controller bike
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benswing

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Reasonable efficiency in watt hours per mile
« Reply #5 on: May 07, 2015, 04:25:40 AM »

I'm just a bit over 100Wh/mi at 55mph on my SR with a windscreen.  If I tuck it stays a smidge below 100.


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xmjsilverx

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Re: Reasonable efficiency in watt hours per mile
« Reply #6 on: May 07, 2015, 08:34:31 AM »

My lifetime average (400 miles in) is 118 wh/mi on a 2015 SR.  I do a 50 mile roundtrip commute at 70 mph give or take.  I don't have a windscreen but I do try to tuck a little.  I get about the same amount of miles per charge as reported by Zero at those speeds.
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steven_first

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Re: Reasonable efficiency in watt hours per mile
« Reply #7 on: May 07, 2015, 05:33:38 PM »

I am a bit amazed at the difference in efficiency so far.  Obviously we can't compare apples to apples as my bike has a wind screen now and weighs over 100 lbs less than the other models and is geared lower but that is still a big difference.  I guess using math and assuming 5000 Wh capacity (not 5700 bc that is MAX and not a real Wh rating) at 65 Wh/mi I should get up to 76 miles per charge.  As I have been tweaking the bike I have been getting closer and closer to 60 Wh/mi without changing my average speeds.  If I would quit trying to wheelie over ever bump in the road it would probably be even better.

 
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Lecram

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Re: Reasonable efficiency in watt hours per mile
« Reply #8 on: May 07, 2015, 06:05:35 PM »

I have almost 700 kms on my ODO now, so not a lot, but rode in several circumstances. The consumption depends a lot on the circumstances. We had a strong wind the last few days and riding at 110 km/h with crosswinds increases the consumption strongly.
I just returned from a city ride through Rotterdam in Custom mode with strongest regen and it consumed 34 Wh/km (54 Wh/m).
I see a big difference in consumption between the app and the dash.
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Tater McTatums

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Re: Reasonable efficiency in watt hours per mile
« Reply #9 on: May 07, 2015, 07:26:22 PM »

Rode the SR to work today so I took a screen shot of my consumption. For clarification, I don't have a windscreen on mine yet and I don't typically tuck while riding.
 
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joystix2

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Re: Reasonable efficiency in watt hours per mile
« Reply #10 on: May 08, 2015, 01:20:00 AM »

Tater,
What was average speed to work? All highway?
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Tater McTatums

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Re: Reasonable efficiency in watt hours per mile
« Reply #11 on: May 08, 2015, 02:24:32 AM »

My commute is 90% highway and my speed depends on how much of a hurry I am.  Typically I'll be doing 65-75 mph on my ride to and from work.  Rushed mornings, like today was, between 70-95 until I reach my exit. My commute is only 25 miles each way and I can charge at work so range is not an issue.
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trikester

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Re: Reasonable efficiency in watt hours per mile
« Reply #12 on: May 08, 2015, 03:17:08 AM »

Dirt riding (slow) on my 2013 FX usually runs around 70 to 90 Wh/Mi depending on terrain unless it's soft sand then it will go over 100 Wh/Mi.

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Burton

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Re: Reasonable efficiency in watt hours per mile
« Reply #13 on: May 08, 2015, 05:34:24 PM »

Ok, just did a test with my 2013 SR equivalent with topcase (no shields or plastics [see signature])

27.6 miles into work, it registered as 29 miles in the app (I have the high speed gearing) meaning I needed to multiply my indicated 137w/mile by about 1.048 and got 143.6 w/mile

This traveling about 10% city and 90% highway from 65-80 and no more. Didn't tuck for this test but I have found it does decrease the w/mile by about 10 or 15 in the past.

My average to date is 126w/mile but over winter I largely went 60-65. I have about 8900 miles on the bike now and 1022 whrs used
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Tater McTatums

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Re: Reasonable efficiency in watt hours per mile
« Reply #14 on: May 08, 2015, 10:43:14 PM »

I decided to check what the dash said compared to what the app said and there is a large discrepancy. The app claims 162 wh/mi but my dash claims 134.5 wh/mi. Picture included for verification.
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