05-06-15, 02:56 AM
I learned this sort of stuff in a general way rather than specifically about cars and bikes and engines so this is how I’d look at it some people might find it interesting most probably won't :lol
I learned Metric rather than Imperial so I use standard SI units and formulas. Here’s a link on SI units if you want to know a bit about them and why they’re used http://en.wikipedia.org/wiki/Internation...m_of_Units The good thing about using SI units is that there’s only seven base units and you get all the other units for everything that's measurable in the world by either multiplying or dividing those seven base units. In general when you’re doing calculations you always convert the numbers back to those base units before you get started because one of the handy things about SI units is that if you know the unit your answer is in you can work backwards and figure out what the formula used to get the answer was.
Take Torque as an example. With bikes we all know about torque wrenches. So you set your torque wrench to 50Nm and give it a turn until it clicks job done. Well the formula for Torque from an engineering and maths point of view is Torque = Force x distance. So that makes sense you put a force on the end of the wrench, the wrench is a set distance from the bolt so you get a torque on the bolt. If you want a higher torque you put more force into the wrench. If you look at it from a maths point of view the SI unit for Torque is Nm which stands for NewtonMetre. Newton is the unit of Force and metre is the unit of distance. Putting them beside each other is a quick way of saying they’re multiplied together. So if you know Nm is the unit of Torque you can work out that the formula for Torque must be Force multiplied by distance which it is. Force(N) x distance(m) = Torque (NM)
Like I said you can do that for anything that’s measurable so another one that everyone knows is velocity (or in other words speed). The engineering definition of velocity is it’s the rate of change of distance with respect to time which is basically how much distance you covered in a certain amount of time. The higher you’re velocity the more distance you’re covering in that amount of time which makes sense. The SI unit for velocity is m/s which is metres divided by seconds so from that you can see that the formula for Velocity must be Velocity = distance(m) / time (s) because the units are m/s . So you can use that idea to work out anything and for doing calculations on the performance of bikes and cars and engines and that sort of stuff you’re mostly interested in speed and acceleration which is called linear motion. Then you’ve got power and torque which is angular motion. They don’t all directly relate to each other but with a bit of manipulating of the formulas and bring in some other stuff you can get them to link together. If anyone is interested I could get into it a bit when I've got some time to write it up or if this stuff is putting ye to sleep I won’t bother :lol
I learned Metric rather than Imperial so I use standard SI units and formulas. Here’s a link on SI units if you want to know a bit about them and why they’re used http://en.wikipedia.org/wiki/Internation...m_of_Units The good thing about using SI units is that there’s only seven base units and you get all the other units for everything that's measurable in the world by either multiplying or dividing those seven base units. In general when you’re doing calculations you always convert the numbers back to those base units before you get started because one of the handy things about SI units is that if you know the unit your answer is in you can work backwards and figure out what the formula used to get the answer was.
Take Torque as an example. With bikes we all know about torque wrenches. So you set your torque wrench to 50Nm and give it a turn until it clicks job done. Well the formula for Torque from an engineering and maths point of view is Torque = Force x distance. So that makes sense you put a force on the end of the wrench, the wrench is a set distance from the bolt so you get a torque on the bolt. If you want a higher torque you put more force into the wrench. If you look at it from a maths point of view the SI unit for Torque is Nm which stands for NewtonMetre. Newton is the unit of Force and metre is the unit of distance. Putting them beside each other is a quick way of saying they’re multiplied together. So if you know Nm is the unit of Torque you can work out that the formula for Torque must be Force multiplied by distance which it is. Force(N) x distance(m) = Torque (NM)
Like I said you can do that for anything that’s measurable so another one that everyone knows is velocity (or in other words speed). The engineering definition of velocity is it’s the rate of change of distance with respect to time which is basically how much distance you covered in a certain amount of time. The higher you’re velocity the more distance you’re covering in that amount of time which makes sense. The SI unit for velocity is m/s which is metres divided by seconds so from that you can see that the formula for Velocity must be Velocity = distance(m) / time (s) because the units are m/s . So you can use that idea to work out anything and for doing calculations on the performance of bikes and cars and engines and that sort of stuff you’re mostly interested in speed and acceleration which is called linear motion. Then you’ve got power and torque which is angular motion. They don’t all directly relate to each other but with a bit of manipulating of the formulas and bring in some other stuff you can get them to link together. If anyone is interested I could get into it a bit when I've got some time to write it up or if this stuff is putting ye to sleep I won’t bother :lol
![[Image: 2chrhpg.jpg]](http://i62.tinypic.com/2chrhpg.jpg)
![[Image: 29417is.jpg]](http://i57.tinypic.com/29417is.jpg)
![[Image: 606131.png]](http://badges.fuelly.com/images/sig-uk/606131.png)
