"Engine braking?" etc.
#26
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I'm not sure I'm following why you would up-shift to slow. I can see why you would want to lower your cadence, but just slowing in the same gear does that.
Last edited by kbarch; 02-13-15 at 07:12 PM.
#27
ka maté ka maté ka ora
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Just something to think about, really. It wasn't complicated to do under the circumstances, just complicated to explain.
I don't entirely object to freewheeling, but I don't like yo-yo-ing or coasting too much. By avoiding it, one maintains more precise control of speed and changes in speed.
I don't entirely object to freewheeling, but I don't like yo-yo-ing or coasting too much. By avoiding it, one maintains more precise control of speed and changes in speed.
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Going over peaks in Golden Cheetah I found that I don't break 700W below 100 RPM and my power peaks for 5, 10, 15 seconds all seem to be around 120 RPM. At 130 RPM my legs still work that well, and although I can spin 140 the numbers aren't up there.
#30
~>~
Miss Marple mastered that technique ambling though the village on her '52 AW Sports on the way to the parsonage for tea quite some decades ago.
She was an admirable club time trialist running an 83" fixed in her day for the 25 mile event but no one could avoid freewheeling or coasting quite like Miss Marple "back when".
-Bandera
#31
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being in a tall gear exiting a corner is a sure way to get shelled in a race or spirited group ride.
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I think this is the issue: With an automobile, when one downshifts, the motor's RPM rises to match the wheelspeed of the car. Engine braking happens with downshifting with an automobile and not a cyclist because: 1. (obviously) roadbikes use freewheels/freehubs 2. when shifting into a lower gear and lifting off the throttle, the wheels are still spinning the crankshaft, but since no fuel and spark (not sure about the spark) are not being fed into the cylinder, the pistons are compressing the air in there and the increased resistance that the pistons face eventually slows down the crankshaft, which then slows down the wheels. Since a cyclist's legs don't have to deal with increased resistance when downshifting (due to freewheeling and the lack of an increasing resistant force), then it should make sense as to why it seems that a bicycle and an automobile work dissimilarly in this situation.
#33
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If you want to slow down stop pedalling. If you are compelled to pedal just soft pedal in the same gear don't shift at all.
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Or get a fixed gear. Backpedal to your heart's content.
#36
Blamester
Whats so difficult for you guys to understand?
He feathered the brakes and pedalled against them as he was coming to a stop.
And that felt right for him at the time.
Thats all there is to it. No need to make out like he is a fool.
He feathered the brakes and pedalled against them as he was coming to a stop.
And that felt right for him at the time.
Thats all there is to it. No need to make out like he is a fool.
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I suppose it could feel fine but it's pointless, particularly when he's shifting up as well. The discussion of increased control and engine braking added further confusion.
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OK, sorry about the confused analogy, but I can't help but think: legs = engine. By "engine braking" here, I meant slowing down without neutralizing or loosening the connections between the engine (ones legs) and the road under the drive wheel, which happens to be a necessary condition of proper engine braking. I should have also emphasized that this was just a brief sort of finessing, combined with other responses to a need to slow down or stop when pedaling at the high end of cadence abilities.
Last edited by kbarch; 02-14-15 at 08:07 AM.
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OK, sorry about the confused analogy, but I can't help but think: legs = engine. By "engine braking" here, I meant slowing down without neutralizing or loosening the connections between the engine (ones legs) and the road under the drive wheel, which happens to be a necessary condition of proper engine braking. I should have also emphasized that this was just a brief sort of finessing, combined with other responses to a need to slow down or stop when pedaling at the high end of cadence abilities.
#40
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My bike has a real "engine brake". All I have to do is put it in re-gen mode and it slows down the bike quite well...
Last edited by 350htrr; 02-14-15 at 03:27 PM. Reason: spelling
#41
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Did you read my post in #32 ?
The faster you're going, the more dangerous it becomes to "ride" a car. So this gets me to thinking that the faster one is going as a bicyclist, the more worthwhile it might be to consider "driving" the bike.
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OK, sorry about the confused analogy, but I can't help but think: legs = engine. By "engine braking" here, I meant slowing down without neutralizing or loosening the connections between the engine (ones legs) and the road under the drive wheel, which happens to be a necessary condition of proper engine braking. I should have also emphasized that this was just a brief sort of finessing, combined with other responses to a need to slow down or stop when pedaling at the high end of cadence abilities.
#43
~>~
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That may be true, but they all tend to be cheap compared to surgical and/or funeral costs which might be incurred in mountainous terrain when engine braking is not employed and brakes overheat or the brake fluid boils. There's a reason for those emergency exit lanes with deep sand and barriers to slow vehicles that have lost braking power on mountain roads.
#47
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That may be true, but they all tend to be cheap compared to surgical and/or funeral costs which might be incurred in mountainous terrain when engine braking is not employed and brakes overheat or the brake fluid boils. There's a reason for those emergency exit lanes with deep sand and barriers to slow vehicles that have lost braking power on mountain roads.
That's pretty much a sunk cost if you choose to live in such an area though.
I once forgot to engine brake going down the sierra nevada once. I died.
Now my ghost looms these forums.
#48
~>~
He can always hit a pedestrian to slow down if "engine braking" fails , no need for deep sand barriers in Central Park.
-Bandera
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Just kidding - I love my brakes, I love my freewheel, and I use them lots. My knees are especially fond of them.
#50
~>~
Better yet, in all seriousness, take advantage of the fact you have a local velodrome.
There is no better way to learn the proper techniques of cycling than in the controlled environment of the track with experienced coaches at hand.
Show up, rent a bike and take part in the "new rider's" program.
All theories about pedaling technique, handling and drafting evaporate on the reality of the banking, real skills useful on the road replace idle conjecture.
-Bandera
There is no better way to learn the proper techniques of cycling than in the controlled environment of the track with experienced coaches at hand.
Show up, rent a bike and take part in the "new rider's" program.
All theories about pedaling technique, handling and drafting evaporate on the reality of the banking, real skills useful on the road replace idle conjecture.
-Bandera