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Old 08-03-03, 02:03 AM   #1
oxologic
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Something I discovered today!

I was riding today, as usual. I discovered something that I should have noticed long ago. It was about my calves, remember how the calves look like? It is shaped like an aerofoil, just that in the opposite direction. You guys know about the teardrop shape that is supposed to help create lift? However, ours calves are in the opposite direction and that creates drag.

Maybe it was because I am studying the Physics of Fluid now and thus thought more about aerodynamics. Have you guys seen the backward riding thread some time back? Maybe backward riding is the way to go, since we will be having 2 "aerofoils", hehe. I bet we can go faster that way if the bicycle would allow our upper body to have a low position while cycling backwards.
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Old 08-03-03, 04:32 AM   #2
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Compact body positioning is likely to be a more acceptable way to reduce air resistance. Tri bikes with smaller front wheels and an
aero foil back is easier to do than riding blind. If you have an aero belly instead, then a variety of recumbents will reduce this even further. One with a significant recline would be most effective. It is much easier to ride a bent than to steer while riding in reverse. Steve
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Old 08-03-03, 05:50 AM   #3
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the teardrop shape doesn't produce lift - but it does minimize viscous drag. an airfoil is actually a "half teardrop" which produces a pressure differential between the curved and flat sides.

the point isn't for us to use our legs as wings and fly through the air LOL
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Old 08-03-03, 06:07 AM   #4
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Quote:
Originally posted by deliriou5
the point isn't for us to use our legs as wings and fly through the air LOL
You must be a roadie to say such a thing.....
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Old 08-03-03, 06:40 AM   #5
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Quote:
Originally posted by deliriou5
the teardrop shape doesn't produce lift - but it does minimize viscous drag. an airfoil is actually a "half teardrop" which produces a pressure differential between the curved and flat sides.
Wow! That's deep thinking for a cyclist.
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Old 08-03-03, 07:57 AM   #6
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haha, erm yah. The teardrop shape doesn't produce lift, sorry. Especially not when it is placed in our legs. Hehe. It was really fun when I noticed it and I was getting all excited. It's really too bad we can't use the legs to fly.

Have any of you discovered anything?
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Old 08-03-03, 08:55 AM   #7
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I was thinking..what if a bike had the bubble thing in front of it sorta like a motorcycle? A "mini-windshield" ? That should help create a more aerodynamic vehicle, so the wind won't just hit our body and have to wrap around.

Btw. I hate physics! Finally finished 2 term of physics required for Optometry.
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Old 08-03-03, 10:47 AM   #8
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Such "bubbles" are available. Zipper and Mueller make variations for regular bikes, and they provide a few percent improvement especially above 20mph. I have had a more fully
faired bubble on my bent for a while but it was slightly noisy, had some pedal interference on turns and was (at 3+ #) a detriment to hills in central Alabama, where 50 to 400 ft climbs are common.
I found that riding on the flats, I noted no benefit riding behind a rider on a regular bike. I can usually get excellent wind shielding on the recumbent by sitting in. With the fairing wind resistance was the same beside or behind a rider on a regular bike. For web sites search google with above names and "bicycle fairings"
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Old 08-03-03, 01:02 PM   #9
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Do you walk in water?
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