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Old 05-15-2016, 05:52 AM   #1 (permalink)
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This could be an excellent basis for an aero bike.

THe new range of Bultaco electric bikes. Bultaco sends its electric "moto-bikes" to the streets

They're small, light and look as if they would respond well to a good fairing and thus a reduced drag coefficient. More batteries might be needed but that should be possible.

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Old 05-15-2016, 06:46 PM   #2 (permalink)
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Apparently I'm the only one who thinks so.
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Old 05-15-2016, 06:51 PM   #3 (permalink)
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These look rugged and powerful but not fast enough for highway use. The 45 would be a Class B in NY state once approved. A Honda PCX 150 is priced the same or less.
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Old 05-15-2016, 07:26 PM   #4 (permalink)
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If the drag could be reduced substantially a longer rear sprocket could be used and the top speed raised proportionally.

Agreed though, it's still slow .
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Old 05-16-2016, 02:41 AM   #5 (permalink)
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I'm wondering... since the speed is so low, is wind drag really as much of an issue rather than things like weight or the rolling resistance from those fat tires? Otherwise, it seems a novelty. (and an expensive one at that IMO)
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Old 05-16-2016, 04:58 AM   #6 (permalink)
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I find riding a bicycle at varying speeds an excellent indication of the effect of "wind resistance'', the different between 10 mph and 20 mph is HUGE.

It's certainly expensive , all electric bikes seem to be.

Last edited by PeterS; 05-16-2016 at 06:25 AM..
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Old 05-16-2016, 02:02 PM   #7 (permalink)
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The hub motor may not have a gear system that can be changed to take advantage of lower drag shapes. If that is the case then it is a matter of switching to a higher voltage to try for more rpm. The armature has to be balanced, the windings secure, and the bearings up to the load. Legal speed limits come into play as well so drag reduction is used to extend range more than anything else. See recumbent.com for the latest HPV shell design software. As with any vehicle a full aero treatment may double fuel efficiency.
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Old 05-17-2016, 01:02 PM   #8 (permalink)
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What about this electric bicycle makes it different from the other million ebikes out there, with regards to being a better aero platform?

What are your intentions for the vehicle use? Certainly not a high speed highway vehicle.


You can add a fairing to any ebike. I don't understand this topic.
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Old 05-19-2016, 03:05 AM   #9 (permalink)
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This design may have slightly better attention to the shape of the battery pack and frame. Whether it is for drag reduction or just styling is hard to tell. People may be excited by the revival of the Bultaco name.
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Old 05-19-2016, 05:55 AM   #10 (permalink)
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For those who want more power ..... Bultaco rides again with all-electric motorcycles: The Rapitan and Rapitan Sport

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