| Author | Message | ||
     Petrey |
As Safety Officer of my club I am trying to fine a graph of the performance envelope of a motorcycle on pavement. Such graphs are common for aircraft but I have not been able to fine one for a motorcycle, although they are commonly talk about. A graph of the performance envelope for a typical rider would also be useful. If anyone can provide me with ether of these or suggest a source it would be appreciated. | ||
| Clevelandxb9r |
I looked at: http://en.wikipedia.org/wiki/Doghouse_plot to see what a performance envelope graph is. It seems to be altitude vs. power (how much power does it take an aircraft to fly straight and level at a given altitude (I guess speed would stay equal?).) So, for a MC would you be looking for something like speed vs. power? (How much hp does it take to maintain a given speed on level ground, no wind etc.) | ||
| Petrey |
Clevelandxbr, As Flight Instructor I am familiar with the diagrams for aircraft. The FAA calls them Vg diagrams. The X axis is true air speed and the Y axis is G load. The envelope is the point where the aircraft is damaged or stalls. Power is not a factor. Some don’t have engines. Speed can be obtained by pointing the nose down. The attitude is also not important. The X and Y axis on a performance diagrams (envelope), for a motorcycle (or car), are both represent G loads. It will basically be a circle modified by weight transfer under acceleration and deceleration, suspension action and many other factors. When the envelope is exceeded there is wheel(s) spin, slide, and the bike skids, low sides etc. | ||
| Slaughter |
Too many variables - what tire/compound/temperature - then factor in road surface and temperature. Kinda hard to nail down simply | ||
| Clevelandxb9r |
Looks like I was looking at the wrong type of graph. And it seems like that would be hard to do for a motorcycle. With a car, I could possibly see it working. On a bike the rider does soo much more than steer, like weight transfer etc, plus all the things Slaughter listed. Good Luck |
