Input shaft - Wheel speed calculation
Discussion
http://www.vmar.com/java/gear.html
http://www.f-body.org/gears/
http://www.fatboyraceworks.com/gears/
http://www.geocities.com/z_design_studio/transmiss...
Although must say, some odd numbers in there..
A 17ft tyre ? thats kinda huge ? are we talking steam rollers ?
Ad the diff ratio, 22:1 is also big.
http://www.f-body.org/gears/
http://www.fatboyraceworks.com/gears/
http://www.geocities.com/z_design_studio/transmiss...
Although must say, some odd numbers in there..
A 17ft tyre ? thats kinda huge ? are we talking steam rollers ?
Ad the diff ratio, 22:1 is also big.
Edited by stevieturbo on Thursday 12th July 19:01
Ok, some more explanation required.
This is the vehicle
Tyre size is 30.5 x 32 inch, the gearbox is a 1.5:1 step up and I need to know how fast the wheel speed will be, and how to do the calculation.
Thanks for the links but I'm not sure they're of any use in this instance, the tyre size and gearbox ratio formula don't really fit this senario.
This is the vehicle
Tyre size is 30.5 x 32 inch, the gearbox is a 1.5:1 step up and I need to know how fast the wheel speed will be, and how to do the calculation.
Thanks for the links but I'm not sure they're of any use in this instance, the tyre size and gearbox ratio formula don't really fit this senario.
Edited by simonelite501 on Thursday 12th July 19:21
Using the same logic, I came to a similar figure, and thats not quite fast enough. I have the option of adding a truck gearbox which gives the top gear as .74 over 1:1 (direct drive) So, am I correct in thinking that if the input speed is 4500rpm, the gearbox is overdriving to .74 over direct drive, the output speed would be 7830rpm? If so, that would work out to a far more respectable 68.7 mph.........wouldn't it??????????????
It's a 27 litre V12 tank engine, maxium rpm is 3000, due to safety rules you are only allowed to overdrive the centrifugal clutch 1.5 times engine speed.
The truck gearbox is a 9 speed box (8 + reverse), the top 4 have been welded up so that makes it a 4 speed. 1st and second are under drives, i.e less than 1:1 3rd is direct drive and 4th is .74 over 1:1.
I just spoke to a mechanic with another pulling team and he said that the .74 over 1:1 comes out at 1.35:1 so that bruings us up tp 57mph, which is where we want to be, so I think the problem is sorted, well the maths at least. We've now just got to source the bits and put them all together........the saga continues.
The truck gearbox is a 9 speed box (8 + reverse), the top 4 have been welded up so that makes it a 4 speed. 1st and second are under drives, i.e less than 1:1 3rd is direct drive and 4th is .74 over 1:1.
I just spoke to a mechanic with another pulling team and he said that the .74 over 1:1 comes out at 1.35:1 so that bruings us up tp 57mph, which is where we want to be, so I think the problem is sorted, well the maths at least. We've now just got to source the bits and put them all together........the saga continues.
Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff