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Wheel disc cover effectiveness? |
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Woolly Hat 
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Joined: 12 May 2017 Status: Offline Points: 151 |
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 Topic: Wheel disc cover effectiveness?Posted: 07 April 2020 at 3:55pm |
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I've been thinking of making some new wheel disc covers for my low racer and I wondered what effect these would have on aero efficiency when combined with fairings or enclosed wheel wells.
Has anyone here done any back to back testing of covers in a velo or streamliner? I'd hope that any improvement would multiply by the number of wheels so that something like a Quattrovelo would have a noticeable reduction of power for a given speed with the wheel discs on. Anyone got any experiences on this subject they'd like to share?
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Ross Low Racer 77 and WozzaMarauder
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Balor
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Joined: 25 January 2017 Status: Offline Points: 154 |
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Posted: 07 April 2020 at 9:58pm |
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Given that only a small fraction of wheel is showing and it is going with the air flow... likely not much.
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RoyMacdonald
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Joined: 09 March 2007 Location: Rye East Sussex Status: Offline Points: 981 |
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Posted: 07 April 2020 at 11:50pm |
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Gives the Kingcycle about 2 kph average speed increase.
Roy
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Yanto
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Joined: 11 July 2005 Status: Offline Points: 1521 |
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Posted: 08 April 2020 at 11:44am |
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I've run with and without in all my velomobiles, I can't say I've noticed any difference in real world usage, of course if I were to carry out roll down testing there may be a difference.
I still have covers on the front wheels of my Df velomobile, but not on the rear, having them on the front makes me think I'm going faster which is good enough for me. There are many other aspects that would definitely make me faster, e.g being lighter and fitter.
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Woolly Hat
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Joined: 12 May 2017 Status: Offline Points: 151 |
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Posted: 08 April 2020 at 2:28pm |
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Yeah, the younger, fitter and thinner aspect would certainly help my speed too, it was more an interest in incremental improvements that can be applied to our steeds. Maybe we should be considering psychological upgrades for more speed - red ones go faster perhaps?
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Ross Low Racer 77 and WozzaMarauder
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