RC-Junkies is an internet community formed by many hobby level drivers. Beside a forum where people can talk with each other and show their cars and other stuff there is also a news page and a "crew team" arranging meetings and demo's. The standard plan is to arrange 1 meeting per month and that could be just having fun on a free spot up to giving spectaculair demo's at car shows like tracktor pulling events and the Monster Jam. The funny thing is that most of these enthustiasts have no experience with real racing RC cars but do like to promote the hobby and sport as it is.

Comment (5) Read More...

Well, some months with many races behind and still driving with the DAX suspension. Each race I made small adjustments on the setup not to change the whole driving of the car and finally I am at a point that the car runs great.

First of all I must say after many races there is a lot of play on the system which does not give a negative effect on the handeling, I already made a deal with my sponsor to make some drawings of the parts and he will create them from a better material with his full CNC 7 axle milling machines. A small production is possible to have some spares and maybe to give away to those who want to give it a try.
And yes, more and more people have seen the car during the races knowing this system is on it and most of them realy do notice the grip my rear end has. One driver even want to try my system on his car knowing how easy it can be taken out of my car and mounted on his car and the dad of another driver is thinking of a next winter project arround this invention.

But what have I done:

1) I had to adjust the tire wear to almost flat which does give about 1 degree camber setting

2) Also the front tires had to be adjusted to less camber to get a flat tire wear.

3) Uundersteer on throttle was still an issue and was the main thing to focus on. I was already running a short based chassis which did give me a more range on the caster setting with the upper arms to improve some steer. As mentioned the GRP 32 shore all arround did give me more steer but the Twister 35 from last year were a disaster with a lot of understeer.

4) Did go back to 1.5 degree toe-in on the rear.

5) With a new body I decided not to mount the rear trimstrip and funny enough the car is still very stable without it. At this point racing with the older Twister tires giving some understeer I could set a new personal lap record on my home track.  With the low mounted body (160 mm)  without the use of a trimstrip I had noticeable more topspeed on the straight.

6) With a new supply of GRP tires I decided to try 32 in the front and 35 in the rear, I was told some others with the normal suspensions do run the same.
And there it was, I had a very agressive steering car without a loose rear end and still a bit of understeed on throttle comming out of a corner but that was not anoying. During the GP in Apeldoorn I have bettered some personal records, not with much but knowing I was running an older Novarossi 421 engine there could be more with a newer engine.
Meanwhile the pins in the rear dogbones need to be replaced more often but the rest of the MRX4 drivetrain does hold on very well with the large forces due the high grip.

With the upcomming up MRX5 I probebly start with the standard car but I wonder how long it takes that DAX will be on it........

Comment (4)

It started a long time ago (about 10 years) when the Renault F1 team had some kind of camber corecting system making a lot of grip and some technical talk about it was done on a Dutch F1 forum. Someone mentioned a British site called Daxcars with a simple but very inovative construction.  In the base the right and left suspension are connected to each other and so the camber of the left is corrected by the suspension of the right and visa-versa.

2 years ago a friend made a switch to largescale and bought a used FG truck. It was very frustrating to drive it because he could not find any grip at the rear. He copied setups from other truck drivers and we even changed the geometry to see if it the grip would improve but with no succes. Then I was triggered by this DAX system and mentioned it to my friend who was very interested. After some study and thinking we came up to a way that would fit on the car.

Comment (3) Read More...