Dear fellow T2 racers
As nobody seemed to be to enthusiastic about posting T2 measures I had to do myself. Here's my simulations and personal findings based on T2 measured data. Discussion welcome.
Please have a look at the following picture. It shows the 4 possible options of the T2 ackermann settings. Inner position forward refers to the servo saver shaft mounted in the forward position (not the indicator). To have a common reference for comparison I adjusted each setting to set the outer wheel at 25 degree angle. The difference in wheel angles and the angle necessary to set the outer wheel at 25 degrees are shown.
From looking at the pictures I conclude the following:
1. Using the outer forward position regardeless of the inner position setting inreases the ratio servo input to steering angle (less servo input required to set the same wheel angle). By using this setting you will notice that you need to reduce servo throw significantly. This in effect reduces the system resolution, means your servo has to be far more accurate in setting a given angle (especially repetition accuracy).
2. There is effectively only three usable ackermann settings
a. Inner position backwards, outer position forward resulting in the highest ackermann ratio
b. Inner position backwards, outer position backwards resulting in medium ackermann ratio
c. Inner position forward, outer position forward results in just the same ackermann ratio as b., but has the negative effect described in 1.
d. Innerpostion forward, outer position backwards has just a little bit less ackermann ration than b. (and c. of course)
3. Reading 3. I concluded there is no point in setting c.
4. Changing the inner setting to the forward position does not change ackermann significantly. May be that's the reason why other brands didn't bother to offer this option and stayed with the outer position option.
5. The Kit basic setup is well selected. You can easily go in both directions changing a single parameter.
What I haven't done so far is looking at the overall characteristic (servo saver angle over wheel angle). The kit setting (b.) seems to be fairly linear, don't know about the others yet.
Have fun interpreting ...
|