12
   

Which is more efficient riding a bicycle or walking?

 
 
maxdancona
 
  1  
Reply Fri 16 Feb, 2018 04:29 pm
@hightor,
That is really cool, Hightor.

People walking is about as efficient as automobiles? That is a little surprising.
maxdancona
 
  2  
Reply Fri 16 Feb, 2018 04:39 pm
@maxdancona,
Looking at the numbers a little more... it looks like the numbers on Hightor's cool graph take into account the weight of each vehicle. So cars appear to be as efficient as a human because cars are heavier.

This chart gives numbers in Person-Miles/gallon... the energy to transport 1 person over a distance of one mile converted to gallons of gasoline. I think this is more relevant.

https://truecostblog.com/2010/05/27/fuel-efficiency-modes-of-transportation-ranked-by-mpg/

Code:
Transport Average PMPG Max PMPG
Bicycle [3] 984 984
Walking [1] 700 700
Freight Ship [10] 340 570
Running [2] 315 315
Freight Train [7] 190.5 190.5
Plugin Hybrid [5] 110.6 350
Motorcycle [4] 71.8 113
Passenger Train [7] 71.6 189.7
Airplane [9] 42.6 53.6
Bus [8] 38.3 330
Car [4] 35.7 113
18-Wheeler (Truck) [5] 32.2 64.4
Light Truck, SUV, Minivan [4] 31.4 91
0 Replies
 
Real Music
 
  1  
Reply Fri 16 Feb, 2018 07:54 pm
Although it's slightly off topic, I think a bicycle is probably better for joints.
maxdancona
 
  1  
Reply Fri 16 Feb, 2018 08:09 pm
@Real Music,
Quote:
I think a bicycle is probably better for joints.


No no no no. I don't do that no more...


Real Music
 
  1  
Reply Fri 16 Feb, 2018 08:11 pm
@maxdancona,
That was a funny. Smile
I meant knees and ankles. Very Happy
0 Replies
 
ekename
 
  1  
Reply Fri 16 Feb, 2018 08:20 pm
@coluber2001,
Quote:
At what point does it become more efficient to ride the bicycle, if at all, than to walk.


At the intersection.
maxdancona
 
  1  
Reply Fri 16 Feb, 2018 10:18 pm
@ekename,
From personal experience. I keep my bike on the first floor sunroom. It is pretty easy to just hop on. If I am going a mile or more it is clearly easier to ride than to walk. If I am going to the convenience store a couple of blocks away... I tend to walk.

Of course, biking is only efficient on paved roads.
farmerman
 
  1  
Reply Wed 21 Feb, 2018 02:45 pm
@maxdancona,
electric bikes with higher amp (like 10 amp) 48 v lithium sulfur batteries are now available and they are even progressing at new limit every 6 months.
An electric assist bike will stay running for about 2 hours now and charging is pretty quick. Im 180 and the bike will carry about 250 easily. I often take it to town to get breakfast. We live about 4 mi out of the small town of Strasburg nd its pretty hilly
maxdancona
 
  1  
Reply Wed 21 Feb, 2018 04:35 pm
@farmerman,
When you ride an electric bike... how much do you typically pedal?
farmerman
 
  1  
Reply Wed 21 Feb, 2018 05:03 pm
@maxdancona,
going up a hill, its peddle all the way but the motor is an assist. In the flats its all electric unless you wish to peddle. on the flats,Top speed around 20mph, and even that feels fast for a bike on a flat. Down hill theres a bit of charging (like an old Ford Escape hybrid car). We bought three a few years ago and use em at the beach. I charge up the batteries in winter and keep em on a rack where I can check every few weeks .
I still hve a concern with Li battery tech because of the risk of fire whenever li is in an oxide stte. Thats why the new Li cells are going to other Li compounds
maxdancona
 
  1  
Reply Fri 23 Feb, 2018 01:28 pm
@farmerman,
That sounds like fun. I would love to try one. I used to bike to work (about 9 miles). I would have to shower usually and I would generally bring in a change of clothes on the days I would drive. Now my commute is about 55 miles... a little far on a bike.

If I could bike 10 miles and not feel the need for a shower afterwards, that would be nice.

InfraBlue
 
  1  
Reply Fri 23 Feb, 2018 03:40 pm
A growing concern in professional cycling is what is being called "mechanical doping" and "bike doping." Motors are being hidden in a bike's downtube, or incorporated into the rear wheels' hubs.

Here is footage of some instances of suspected mechanical doping.


farmerman
 
  1  
Reply Fri 23 Feb, 2018 03:45 pm
@InfraBlue,
so they are dding motors and drive wheels in existing racing bikes. You do understand that this makes the bikes considerably heavier and the Li batteries are good for less than 40 miles. A dys marathon lg would be much longer and whatever else, the motor and drive would be big weight drag on the rider.

We drive 20 mi tops on a charge and if we would hit hills like in France (or even here in Pa), we can get maybe 15.
0 Replies
 
farmerman
 
  1  
Reply Fri 23 Feb, 2018 03:48 pm
@maxdancona,
batteries are getting better and better. Id say a 50 mi battery is doable in another year or two, You could bike to ork, charge it for hlf the work day and hve a fresh charged up battery t dys end. HOWEVER, the best batteries are only good for about 1500 charges, about 3 years at work
0 Replies
 
maxdancona
 
  1  
Reply Fri 23 Feb, 2018 04:42 pm
@InfraBlue,
I assume that mechanical doping would be pretty easy to detect once you were looking for it, right? It needs some way to transfer torque to the wheel which I imagine can't be that easy to hide.
0 Replies
 
coluber2001
 
  1  
Reply Sun 25 Feb, 2018 03:32 pm
http://media-cache-ec0.pinimg.com/736x/86/1a/4a/861a4a4a5a6b44c63ea32b3ed8f42be9.jpg
0 Replies
 
 

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