| Author |
Message |
    
Sifo
| | Posted on Friday, May 31, 2013 - 09:55 pm: | 
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True that they won't be 100% efficient, but I would expect better than 99%. I just don't see the losses from that being a major issue. I see far bigger issues that will be far more pressing than a minor loss of efficiency, even though that is usually considered critical in a bicycle.
They have managed to engineer in competing needs. A lack of damping creates a terrible, borderline dangerous ride quality. Adding damping will create rolling resistance. Current systems manage both of these issues quite well already. |
Blake
| | Posted on Saturday, June 01, 2013 - 06:20 am: |
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If you do the math, you might be surprised.
If the sag is 1" front and rear with a total deadweight of 200 LBs, then for each revolution of the wheels the springs complete one full cycle with total travel of 4" (2" compression stroke so-to-speak and a 2" extension stroke).
So for 1% inefficiency, we have total energy loss of 0.01*(200*4") = 8 IN*LB per revolution.
Say roughly 12' of travel per revolution of the wheels and a rate of travel of 10 MPH (880 FT/Min); that results in a wheel rotation rate of 880/12 = 73 RPM
So then we have 73*8 = 587 IN*LB/Min (49 FT*LB/Min = 0.09 HP = 66 W)
I blew through that pretty quickly, so it warrants checking. |
Mr_grumpy
| | Posted on Saturday, June 01, 2013 - 12:20 pm: |
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Test review here.
http://www.bikeradar.com/gear/category/components/ wheel-sets/product/review-loopwheels-20in-spokeles s-suspension-wheel-13-47253 |
Blake
| | Posted on Sunday, June 02, 2013 - 05:11 am: |
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Sounds very promising. Cool! |
Clutchreaper
| | Posted on Wednesday, June 05, 2013 - 10:10 pm: |
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High speed cornering with these would have me concerned. Without the stiffness of spokes I would think there would be side flex when a rider is switching side to side with twistys and dragging knees. A bicycle, ok. AMA, WSB, no. |
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