Post by snyper on Jan 30, 2013 9:41:14 GMT 8
This information is originally posted here:
Tech Q&A: Uneven wheel sizes (23.0mm front and 22.5mm rear)
tamiyamalolos.yuku.com/topic/1516/Tech-Q-Uneven-wheel-sizes-230mm-225mm-rear#.UQh4Db9M-Jk
Comparison between uneven wheel size setup and 10T-8T setup #16 [-]
Posts: 21
Feb 11 12 12:36 PM
Based on bro lagalag.tamiya's post about the 23.0mm front and 22.5mm rear setup being similar to the 10T-8T propeller shaft setup, I calculated the differences in speed between the various setups popular in the forums:
Setups
10T - 8T Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 10T - 8T propeller shaft
- 22.0mm front wheels + 22.0mm rear wheels
- Super-FM chassis
23.0 - 22.5 Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 8T - 8T propeller shaft
- 23.0mm front wheels + 22.5mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
22.4 - 22.2 Setup:
- Torque Tuned motor
- 4.2:1 gear ratio
- 8T - 8T propeller shaft
- 22.4mm front wheels + 22.2mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
23.0 - 22.0 Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 8T - 8T propeller shaft
- 23.0mm front wheels + 22.0mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
Comparison
10T - 8T Propeller Shaft Setup:
- Front wheels = 16.00 kph (est)
- Rear wheels = 15.00 kph (est)
- Speed difference between front and rear wheels = 1.00 kph
23.0 - 22.5 Setup:
- Front wheels = 16.73 kph (est)
- Rear wheels = 16.36 kph (est)
- Speed difference between front and rear wheels = 0.37 kph
22.4 - 22.2 Setup:
- Front wheels = 16.99 kph (est)
- Rear wheels = 16.83 kph (est)
- Speed difference between front and rear wheels = 0.16 kph
23.0 - 22.0 Setup:
- Front wheels = 16.73 kph (est)
- Rear wheels = 16.00 kph (est)
- Speed difference between front and rear wheels = 0.73 kph
From the above we can say that the 10T-8T setup has the biggest speed difference between front and rear wheels. From the uneven wheel setups, the 22.4 - 22.2 setup (a.k.a 4.2:1 setup) has the smallest speed difference between front and rear wheels. If all of these setups would be running along a steep banked approach (going downhill), the car with the fastest downhill speed would be the 22.4 - 22.2 setup, then next would be the 23.0 - 22.5 setup, and then the 23.0 - 22.0 setup. The slowest car going downhill on the same banked approach would be the 10T-8T setup.
Controlling the downhill speed (or free-wheeling speed) of the car is very important since most track layouts here have a steep banked approach with a slope at the bottom then followed by a turn or wave section. Go too fast and the car will jump off the tracks due to the slope. Go too slow and the other cars on the track will have a 1-2 car length advantage. You can theoretically fine tune the downhill speed of your setup by changing the difference in size between front and rear wheels. Unfortunately the 10T-8T setup is not allowed in tech races anymore
-----------------
This is just an extract form a long discussion thread.
Tech Q&A: Uneven wheel sizes (23.0mm front and 22.5mm rear)
tamiyamalolos.yuku.com/topic/1516/Tech-Q-Uneven-wheel-sizes-230mm-225mm-rear#.UQh4Db9M-Jk
Comparison between uneven wheel size setup and 10T-8T setup #16 [-]
Posts: 21
Feb 11 12 12:36 PM
Based on bro lagalag.tamiya's post about the 23.0mm front and 22.5mm rear setup being similar to the 10T-8T propeller shaft setup, I calculated the differences in speed between the various setups popular in the forums:
Setups
10T - 8T Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 10T - 8T propeller shaft
- 22.0mm front wheels + 22.0mm rear wheels
- Super-FM chassis
23.0 - 22.5 Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 8T - 8T propeller shaft
- 23.0mm front wheels + 22.5mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
22.4 - 22.2 Setup:
- Torque Tuned motor
- 4.2:1 gear ratio
- 8T - 8T propeller shaft
- 22.4mm front wheels + 22.2mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
23.0 - 22.0 Setup:
- Atomic Tuned motor
- 5:1 gear ratio
- 8T - 8T propeller shaft
- 23.0mm front wheels + 22.0mm rear wheels
- Super-FM, Super-TZ, Super-TZX chassis
Comparison
10T - 8T Propeller Shaft Setup:
- Front wheels = 16.00 kph (est)
- Rear wheels = 15.00 kph (est)
- Speed difference between front and rear wheels = 1.00 kph
23.0 - 22.5 Setup:
- Front wheels = 16.73 kph (est)
- Rear wheels = 16.36 kph (est)
- Speed difference between front and rear wheels = 0.37 kph
22.4 - 22.2 Setup:
- Front wheels = 16.99 kph (est)
- Rear wheels = 16.83 kph (est)
- Speed difference between front and rear wheels = 0.16 kph
23.0 - 22.0 Setup:
- Front wheels = 16.73 kph (est)
- Rear wheels = 16.00 kph (est)
- Speed difference between front and rear wheels = 0.73 kph
From the above we can say that the 10T-8T setup has the biggest speed difference between front and rear wheels. From the uneven wheel setups, the 22.4 - 22.2 setup (a.k.a 4.2:1 setup) has the smallest speed difference between front and rear wheels. If all of these setups would be running along a steep banked approach (going downhill), the car with the fastest downhill speed would be the 22.4 - 22.2 setup, then next would be the 23.0 - 22.5 setup, and then the 23.0 - 22.0 setup. The slowest car going downhill on the same banked approach would be the 10T-8T setup.
Controlling the downhill speed (or free-wheeling speed) of the car is very important since most track layouts here have a steep banked approach with a slope at the bottom then followed by a turn or wave section. Go too fast and the car will jump off the tracks due to the slope. Go too slow and the other cars on the track will have a 1-2 car length advantage. You can theoretically fine tune the downhill speed of your setup by changing the difference in size between front and rear wheels. Unfortunately the 10T-8T setup is not allowed in tech races anymore
-----------------
This is just an extract form a long discussion thread.