I also spin at the gym every day after work for at least 45 minutes. I keep my cadence around 85-90 and end up burning 400-450 calories.
This is even more ideal for the reasons that I mentioned. However, I personally hate being stuck inside, and if I'm not going to enjoy it, I won't keep at it. Good for you for doing that though.
I just bust out the iPad and watch a TV show and zone out.
This is even more ideal for the reasons that I mentioned. However, I personally hate being stuck inside, and if I'm not going to enjoy it, I won't keep at it. Good for you for doing that though.
I just bust out the iPad and watch a TV show and zone out.
http://www.bbc.co.uk/news/health-17177251
Only slightly relevant.
30-45 minutes of spin bike cardio every day will help increase your endurance. It's pretty simple. You'll also burn fat and tone your leg muscles.
So it's weight that governs heat dissapation, NOT surface area which is greatly increased? Who'd have thought!
It is weight that works in motorsports. In this example the pad contact area remains the same regardless of rotor size, the extra power comes from leverage but in straight heat dissipation more metal spreads out the heat better.
If it's the weight that dissipates it, why do top motor sports teams spec super-light carbon ceramic discs?
Here's a hint;
vs
reducing unsprung weight is good for suspension performance, i think the kind of composite disc they use only works well at high temperatures, sometimes they shroud them so they do not cool too much just when you need them most at the end of a long straight.....but i might be talking out my rear exit as i just watch top gear! it may just be surface area that helps cool by radiation, or light things may cool quicker than heavy things...? need an experts opinion...
different materials disipate heat at different rates. Usually lighter weight metals tend to transfer heat at a faster rate. Surface area is your friend when cooling. Look at a CPU cooler it has many thin flat fins that are have air blown over it. The more surface area the larger the number of air/water molecules can be heated removing heat from the hot object
different materials disipate heat at different rates. Usually lighter weight metals tend to transfer heat at a faster rate. Surface area is your friend when cooling. Look at a CPU cooler it has many thin flat fins that are have air blown over it. The more surface area the larger the number of air/water molecules can be heated removing heat from the hot object
so a heavy disc will not overheat as quickly,but take longer to cool?
different materials disipate heat at different rates. Usually lighter weight metals tend to transfer heat at a faster rate. Surface area is your friend when cooling. Look at a CPU cooler it has many thin flat fins that are have air blown over it. The more surface area the larger the number of air/water molecules can be heated removing heat from the hot object
so a heavy disc will not overheat as quickly,but take longer to cool?
Its material type and surface area, certain materials have different heat dissipation (convection, radiation, conduction). for example the block above vs the finned block: the finned block has greater surface area than the solid block. Weight has nothing to do with it as the same material that weighs less can have greater surface area than the same material that weighs more. Rotors are constantly dissipating heat as well as having heat transferred to them as they are engaged. A rotor doesn't store the heat than dissipate (cool). Larger rotors just dissipate the heat quicker than a smaller one.
different materials disipate heat at different rates. Usually lighter weight metals tend to transfer heat at a faster rate. Surface area is your friend when cooling. Look at a CPU cooler it has many thin flat fins that are have air blown over it. The more surface area the larger the number of air/water molecules can be heated removing heat from the hot object
so a heavy disc will not overheat as quickly,but take longer to cool?
not necessarily. materials have a unique specific heat capacity, and its different for every material. pretty much it determines how much heat is transferred when a certain amount of energy is put in. but then again, it also determines how much energy is lost when it drops in temperature. materials such as water have high specific heat capacities, 4.184 j/(Cg) to be precise, where as copper has a very low heat capacity, like .3 or something. this means it takes 4.184 joules to raise the temperature of 1 gram of water 1 degree celsius, where as it only takes .3 joules to do the same to a gram of copper. when you brake you are converting kinetic energy into thermal energy. so if you had rotors made of copper and then rotors made of water (theoretically) then the rotors made of copper would be like 14 times the temperature of the water rotors if they are the same weight and they stop from the same speed. the trick with brakes is finding a light weight material that wont raise in temperature when you put a lot of energy into it. light weight to appease weight weenies though, not so the brakes are more efficient. Now if you were to compare two rotors of the same material though, the rotor with the more massive braking area should heat up slower. But this is inefficient which is why ceramics are used, because they have a high specific heat with the lowest weight.
different materials disipate heat at different rates. Usually lighter weight metals tend to transfer heat at a faster rate. Surface area is your friend when cooling. Look at a CPU cooler it has many thin flat fins that are have air blown over it. The more surface area the larger the number of air/water molecules can be heated removing heat from the hot object
so a heavy disc will not overheat as quickly,but take longer to cool?
not necessarily. materials have a unique specific heat capacity, and its different for every material. pretty much it determines how much heat is transferred when a certain amount of energy is put in. but then again, it also determines how much energy is lost when it drops in temperature. materials such as water have high specific heat capacities, 4.184 j/(Cg) to be precise, where as copper has a very low heat capacity, like .3 or something. this means it takes 4.184 joules to raise the temperature of 1 gram of water 1 degree celsius, where as it only takes .3 joules to do the same to a gram of copper. when you brake you are converting kinetic energy into thermal energy. so if you had rotors made of copper and then rotors made of water (theoretically) then the rotors made of copper would be like 14 times the temperature of the water rotors if they are the same weight and they stop from the same speed. the trick with brakes is finding a light weight material that wont raise in temperature when you put a lot of energy into it. light weight to appease weight weenies though, not so the brakes are more efficient. Now if you were to compare two rotors of the same material though, the rotor with the more massive braking area should heat up slower. But this is inefficient which is why ceramics are used, because they have a high specific heat with the lowest weight.
What he said I'm not all that great at typing things out
new to me 2012 Fox 36 RCT Fit Tapered steer and bottom headset cup... had to ditch the angleset
Why ditch the Angleset??? Dont think I could ever go back!
he said tapered steerer... makes it kinda hard to run an angleset.
sorry i meant 2010 float! i ditched the angle set as i would have had to buy a whole new headset... so it was cheaper to just buy one lower cup. I actually liked the flickability of the bike before it was slacked out!
Post Message
Quote
