4LikesTamiya TRF416 / TRF416WE / TRF416X
03-25-2009, 02:38 PM
#4906
Turn-in.In theory, the outside tyre will have the most load. So less Ackermann means more turn angle on the outside wheel. The inside wheel has little load so will scrub first. I know this is the case because I have been doing some testing with hole 1 on the steering knuckle.
Mid Corner. Felt like I had a little less steering which supports what your view.
Exit. Again felt like I had more steering as I had to makes changes to improve rear traction out of corners.
This is an interesting discussion guys. Really livening things up in this thread in a positive way!
03-25-2009, 06:46 PM
#4907
any of your guys tryed an very tight diff in front of the car for
rubber carpet???
I saw someone doin this and they said it's better then an 1 way or spool
rubber carpet???
I saw someone doin this and they said it's better then an 1 way or spool
03-25-2009, 06:50 PM
#4908
Bear in mind that the links angle differently on the Xray compared to the Tam... I.e. moving it forward on the inner piviot on the Xray gives more of a link angle, moving it back less.
Adding more angle to the link is effectively the same as shortening at full lock. So adding more angle to them does two things... reduces the steering angle of the outer wheel, and increases the angle of the inner wheel. So putting more angle on the links (losing spacers on the Tam), will give a bigger Ackerman angle. Good guide to what ackerman does is here
http://www.rc-truckncar-tuning.com/ackerman.html
Ackerman is strictly a lateral change, if you change the ball studs in hieght, your adjusting the bump steer characteristics, i.e. how much the steering turns under suspension compression.
HiH
Ed
Adding more angle to the link is effectively the same as shortening at full lock. So adding more angle to them does two things... reduces the steering angle of the outer wheel, and increases the angle of the inner wheel. So putting more angle on the links (losing spacers on the Tam), will give a bigger Ackerman angle. Good guide to what ackerman does is here
http://www.rc-truckncar-tuning.com/ackerman.html
Ackerman is strictly a lateral change, if you change the ball studs in hieght, your adjusting the bump steer characteristics, i.e. how much the steering turns under suspension compression.
HiH
Ed
What I should have done was measure the steering on inside wheel vs. outside wheel with both settings to see the difference. Then record the effect on the track.
Anyways, I think it's a setting a lot of people don't play with. I find that playing with Ackermann helps you out when you can't get the car to do what you want it to do.
03-25-2009, 06:54 PM
#4909
Actually, I found it helps a lot on very small tight parking lot tracks. Never tried it on rubber tire carpet though. Seems to have awesome turn in and mid corner, but not the pull out of a corner like a spool or oneway. I guess going tighter would help with that. Maybe a spiff would help with this.
03-25-2009, 07:05 PM
#4911
Top deck clearance is 25mm. So any lipo under 25mm thick will fit. SMC, Orion, ThunderPower packs should have no problem fitting in this car.
03-25-2009, 07:21 PM
#4913
03-25-2009, 07:55 PM
#4915
03-25-2009, 08:06 PM
#4916
That's not 100% correct though, ackerman is the slip angle but the impact having less/more ackerman differs when the weight is on or of the fronts, and if the wheels are trying to drive or not. Heres what Paul Lemieux had to say...
Originally Posted by Paul L
ackerman is very important, especially when running a spool do to the diff not being able to make up for lost or gained ground while courning.
In general less ackerman (tires are more paralell)makes the car smoother on center (less turn in), then it will also normally give you more steering coming out.
For rubber tires with spool it seems to be more of a ballance thing, less seems to transfer more weight over the front, and more seems to to keep the front end up more threw the courner and by this and transfer more weight over the rear.
In general less ackerman (tires are more paralell)makes the car smoother on center (less turn in), then it will also normally give you more steering coming out.
For rubber tires with spool it seems to be more of a ballance thing, less seems to transfer more weight over the front, and more seems to to keep the front end up more threw the courner and by this and transfer more weight over the rear.
03-25-2009, 10:31 PM
#4918
Bottom chassis screws backing out...
Does anyone have or had there chassis screws back out? I've Loc-Tited all the screws and they seem to keep backing out, happens about every other race and in practice. Don't know if it's from the added flex in the car but I can notice when it starts to back out from the way the car handles. Does'nt allow the suspension to compress in corners and you can hear it too.
03-25-2009, 11:49 PM
#4919
Tech Adept
hey guys what esc's do you suggest for this car? i want something no limit, and also competition spec... i want the most from the chassis!
