random question
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zagfan posted 11 weeks ago.
If I can find a bike in the building I can perform the experiment once the storm hits in a couple of hours :) Actually this is a pretty interesting question, I also wonder what is the highest wind that someone on trifuel has actually gone out to ride in. With high winds I'm usually not worried about moving forward, its the moving sideways on the bike that gets me. Maybe some of the engineers on here can give some insight.
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jwillia852 posted 11 weeks ago.
Wouldn't it be the inverse of what you could pedal? So, in a neutral environment; flat, smooth surface and no wind, if you could pedal a max of 30 mph, Would that translate to what you would be able to net out in a full headwind?
If this is the case - Dont Stop! :-)
Jeff
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Anton posted 11 weeks ago.
oh...I saw "random question" and thought.."Cool! Like 'What's the weight of the sun in grams.' or 'How many stop lights are there in Pocatello Idaho.'"
Interesting question...I'll noodle around a bit and see what I can come up with.
I wonder if this would help?
http://www.patentlysilly.com/patent.php?patID=6880844
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UFTriGator posted 11 weeks ago.
jwillia852 wrote:
Wouldn't it be the inverse of what you could pedal? So, in a neutral environment; flat, smooth surface and no wind, if you could pedal a max of 30 mph, Would that translate to what you would be able to net out in a full headwind?If this is the case - Dont Stop! :-)
Jeff
It doesn't really work that way because of rolling resistance and other forces. That's the reason why it's easier to pedal 15 mph into a 10 mph headwind than it is to ride 25 mph in no wind.
I don't know what the highest wind you could ride in would be, but I've done close to 40 mph (only for a few minutes before I decided that it was a stupid idea and went home). I was doing something like 11 mph going out and 40 mph coming back.
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Triguy98 posted 11 weeks ago.
I cant help with specifics, but one Easter morning, my buddy and I headed out on a 2 hour ride before our families met up for dinner. I though tit was funny that we were going 27mph on the way out (straight out and back on a local trail) without too much effort. didnt really feel anything when we stopped to stretch or at traffic intersections. Long story short, it took us 3 hours to get back to the trail head. One of the most torturous days ever on a road bike.
Life is short. Play hard and get dirty doing it.
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bluebirdbiker posted 11 weeks ago.
I've done 70km/hr headwind wind before and it is very hard to break 20km/hr. on the bike. HR goes sky high. You feel like you're climbing a 15% grade or something. I too abandoned very quickly.
In 2007 IMAZ had some nsaty winds, as they have each year. By the third lap it was into the 55+km/hr headwind on the way back to transition along the B-line and by the end of the bike the balls of the feet were totally numb. This is a characteristic prob. with high winds. I know alot of people suffer on that course each April.
In fact, once I was riding to work and crested a hill. I think it was a gust of like 60km/hr that hit me during a rain event and caused to become almost still. I almost fell off the bike. It was insane.
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PrinceofClydes posted 11 weeks ago.
I used to live in Calgary which is famous for its Chinook winds.
One day it was steady at 40kph and gusting to 70kph, the highest I have ridden in.
I struggled into the headwinds due west at no more than 16kph (ground speed) and it near brought me to tears.
I had planned a 40km ride and was determined to finish. I knew coming home with ataiwind was going to be a breeze! :)
Sure enough I got to the Cochrane turn-off and crossed over into the Eastbound lane of Hwy 1 and ..
with ten pedal strokes I was riding at 40kph. It picked up from there. I peaked at 70kph on a flat road! Lots of fun on the ride home, but I wasn't eager to repeat the outbound leg. I think my average for the 40km ride was about the same as a windless day.
Resistance on a body in wind varies with the cube of the air speed. It doesn't matter whether you are moving or the wind is going by you (as in a wind tunnel). So, in absolute terms the limiting factor is the max force you can produce in your lowest gear. (Even so this assumes a constant windspeed from straight ahead.)
In practical terms,
The limiter is going to be how slow a ground speed you can manage and still balance upright. But in the real world, wind swirls, so balance becomes impossible when the lateral force is too sudden or too strong to overcome. I think that makes for too much variability to predict the max. wind speed for safe riding.
meaning, your guess is as good as mine. heh.
PoC
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SueR posted 11 weeks ago.
Similar to PoC, I did a 3h ride with 2.5 in the same direction against a 70km/h wind. I did about 11km/h as my top speed going out and averaging something like 55km/h coming home. It was in an area known as the Wreckhouse, a really windy highway section in Newfoundland that they close to cars and trucks as it regularily sustains 120km/h winds...Not a fun ride, but once you are out in it, you are dumb enough to finish the ride. Safe? No, I don't think it's that safe personally. Good to get out in it periodically as it changes your bike handling considerably.
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swimmer52 posted 11 weeks ago.
ok well how about this: What's the steepest grade someone can bike without falling over backwards? (applies more to mtb).
I've been to slickrock and worried that some stuff is too steep to climb because I'd fall on my butt.
"Whether you think you can or can't, you're right"
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PrinceofClydes posted 11 weeks ago.
There's a ten km loop through my nearest Provincial Park that has significant elevation change, falling to the lake and climbing back out again.
There is a 10m section, straight and smooth that I can get over without putting a foot down only one time out of ten riding it.
It may be twenty per cent grade or more.
A review for discussion purposes:
"per cent of grade" refers to the number of feet that road rises in one hundred feet travelled, thus, ten per cent grade means it rises ten feet per hundred feet travelled.
"Degree" of slope is not usually used on highways, more often used on ski slopes, where 54 degrees is the max. that will hold snow. It is a trigonometric measurement where 90 degrees means vertical, like the wall in your living room. unless you live in hurricane country. :)
PoC
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Triguy98 posted 11 weeks ago.
swimmer52 wrote:
some stuff is too steep to climb because I'd fall on my butt.
Slick rock is nice cause its generally smooth without abrupt lips and ledges. I love riding on it! Its really a question of momentum, equipment, and skill. I've seen guy go up sick stuff before. Even some our local trails have some crazy segments to them that are impossible with just the smallest amount of rain.
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Ironmom posted 11 weeks ago.
I did a triathlon with 40 mph winds once in the Columbia River Gorge. It took my 3 hours to do a 38 mile course (not to mention, it was 104 degrees)! Since I can't typically bike at 52 mph (40 windspeed plus my 12 mph forward speed), I don't think the two are inversely correlated. You can bike into a faster headwind speed than your usual groundspeed.
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from a different thread:
"Aw c'mon guys! Stop being wuses! Think of he great headwinds that you could bike into to make you strong ;-)"
what is the highest wind speed that a person on a bike could advance forward in?