Rollout Companion
#16
I noticed that Mike B. did his tire size in inches so I wanted to supply equal reference of measurement standards
1 inch = 25.4 mm
Last edited by Infinite 12th; 12-01-2011 at 08:39 AM.
#17
Rearranging the equation to get spur is also a useful tool, especially for oval racers. You see it a lot in the pan car threads: people share what tire diameter works best, what spur works well, and a range of target roll out, but never which pinions work with that combination to get into that range!
When you go to a track or get a new car and have a known wheel diameter, known spur, and a known target roll out, you can plug in the constants and get your target spur without having to guess. That especially helps newbs get into the right range their first time out.
Rollout x Spur / Pi (3.14159) / Tire Diameter (mm) = Pinion
When you go to a track or get a new car and have a known wheel diameter, known spur, and a known target roll out, you can plug in the constants and get your target spur without having to guess. That especially helps newbs get into the right range their first time out.
Rollout x Spur / Pi (3.14159) / Tire Diameter (mm) = Pinion
1. Pi X pinion X Tire Diameter / spur = Rollout
2. Rollout x Spur / Pi (3.14159) / Tire Diameter (mm) = Pinion
3. ? = Spur
4. ? = Tire Diameter
Any math geeks out there to do the final two formula's for the other two variable outputs 3 and 4?
Thanks
#18
Hi so formula's go:
1. Pi X pinion X Tire Diameter / spur = Rollout
2. Rollout x Spur / Pi (3.14159) / Tire Diameter (mm) = Pinion
3. ? = Spur
4. ? = Tire Diameter
Any math geeks out there to do the final two formula's for the other two variable outputs 3 and 4?
Thanks
1. Pi X pinion X Tire Diameter / spur = Rollout
2. Rollout x Spur / Pi (3.14159) / Tire Diameter (mm) = Pinion
3. ? = Spur
4. ? = Tire Diameter
Any math geeks out there to do the final two formula's for the other two variable outputs 3 and 4?
Thanks
Thank you
#21
Tech Master
iTrader: (1)
Actually your rollout is wrong as it does not include the transmission ratio.
It should be:
rollout = Pi*Tire_Diameter/((spur_teeth/pinion_teeth)*trans_ratio)
(e.g. trans ration is 1:1 for a direct drive)
e.g. xray t3:
tire dia = 63mm
spur = 96
pinion = 45
trans = 1.9
rollout = 48.83
It should be:
rollout = Pi*Tire_Diameter/((spur_teeth/pinion_teeth)*trans_ratio)
(e.g. trans ration is 1:1 for a direct drive)
e.g. xray t3:
tire dia = 63mm
spur = 96
pinion = 45
trans = 1.9
rollout = 48.83
#22
Actually your rollout is wrong as it does not include the transmission ratio.
It should be:
rollout = Pi*Tire_Diameter/((spur_teeth/pinion_teeth)*trans_ratio)
(e.g. trans ration is 1:1 for a direct drive)
e.g. xray t3:
tire dia = 63mm
spur = 96
pinion = 45
trans = 1.9
rollout = 48.83
It should be:
rollout = Pi*Tire_Diameter/((spur_teeth/pinion_teeth)*trans_ratio)
(e.g. trans ration is 1:1 for a direct drive)
e.g. xray t3:
tire dia = 63mm
spur = 96
pinion = 45
trans = 1.9
rollout = 48.83
Maybe after this next build if requested I may do a non-1:1 transmission ratio based app
Thanks again
#24
can this be put on an ipod shuffle?
#25
I think Linux have to use wine installed to have access to MS apps and for apple hardware/software I am unsure
I think another build might come that gives output for not just rollout but tire size, pinion and spur
Also I might include a input box for special ratios for non-pancar applications
However, rollout will be default and on top of the other input boxes as well as 1:1 ration be default
We will see
I think another build might come that gives output for not just rollout but tire size, pinion and spur
Also I might include a input box for special ratios for non-pancar applications
However, rollout will be default and on top of the other input boxes as well as 1:1 ration be default
We will see
#26
Sorry to revive such an old thread, but my security program ate my copy of rollout companion. Anybody still have one to share, or a newer substitute?