wtcc's TT-02 KR
#167
Meanwhile I continue with detail work. I added all the blue screws, nuts and ballstuds. Also the expensive servo mounts, an alumium servo arm and the new hard bumper of the T4‘19. The latter three parts added weight, while all the aluminium screws shaved off more than 20 grams.
The steering assembly was rearranged to put the whole unit 2.5mm lower in the chassis. A very easy modification if you have the blue drivetrain parts. The trick is to install the steering posts from above. That is all.


Today the dust caps arrived:

Unfortunately the weather will be cold this weekend. I hope to do the first shakedown indoors in two days.
The steering assembly was rearranged to put the whole unit 2.5mm lower in the chassis. A very easy modification if you have the blue drivetrain parts. The trick is to install the steering posts from above. That is all.


Today the dust caps arrived:

Unfortunately the weather will be cold this weekend. I hope to do the first shakedown indoors in two days.
#168

Tomorrow is shakedown time

I finished all small tasks and made new holes in the body, because of the changed body post locations.
I also used the time to measure the „fight“ weight of the RTR car:

My hope is to be 150 - 200 grams lighter than the competition to compensate for the shorty lipo use outdoors.
The straigths will be my weak point and the curves my strength, at least that is my hope...
Last edited by wtcc; 04-12-2019 at 12:18 PM.
#169
Joined: Feb 2011
Posts: 8,406
From the pictures I can see an extra 40grams of rotational mass in your car's drivetrain... Hopefully you can find a lightweight front spool, lightweight rear ball diff, and a carbon fiber driveshaft....
Last edited by bertrandsv87; 04-12-2019 at 07:37 PM.
#172

Back from the track. The first run was a big relief
The car is working great! Already in the first laps I found a good rhythm. The car does its work in an unimpressed manner. Nothing failed, again not even a loose screw.
The track was hardly used in the past 3-4 weeks and I had to work the driving line all by myself today. With every run the line got faster. In the last run I ended up with 10.9s best laptime and an average of 11.2s the whole day. These numbers tell the story quite good (the driver was not up to his full potential, though). The car is more easy and predictable to drive than the v1. I really wouldn’t have thought, that the lower c.o.g. is as clear to feel as I experienced it today. In the first runs I had the droop set wrong (more than 3mm over ride height) and I didn‘t recognize it, because the chassis hardly rolled under load. After correcting this, I didn‘t improve much and couldn‘t see the car behaving different. Also the car is a blast over the curbs. It stays calm and allows the driver to keep pushing.
Also very recognizable are the Awesomatix camberlinks and my new carbon fiber arms. The car can take more speed into a fast corner than before. With less flex it also seems, that it doesn‘t scrub off speed in the corner middle like it did before.
The plastic parts hold up well. Well, I didn‘t crash the car even once, so they do their job.
If everything goes as planned, I will do an outdoor test on tuesday. Until then I have a load of work to do checking everything, rebuilding the differential, installing the dust covers, and so on (I finally came up with a good idea for the batterymount, too).
Last edited by wtcc; 04-13-2019 at 09:44 AM.
#174
I was diligent again 
First I was excited to finally make a befitting lipo mount to get rid of the tape and and the lexan angles I used up to now. It is definitely an easy solution consisting of two L-shaped carbon fiber parts with two holes to mount them on the backbone of the chassis just underneath of the drive shaft; and one hole on the other side to mount a small post and the small carbon fiber plate (this part is doing its job since I bought it from Reflex Racing for my TC6.1) that holds down the battery:

And then I installed the dust covers. The fitting is nearly perfect, but I am sure dust will find a way. If it keeps out sand and stones, then I am happy.



Again the rear differential needed a full service. A mix of green slime and oil was pushed out and all over the left side of the car. I had enough of this and cleaned everything. I took an 8mm drill, widened and deepened the O-ring hole. Then I took Xray shock O-rings and slipped them over the outdrives. Lets see if this will solve the leaking from the outdrives.

First I was excited to finally make a befitting lipo mount to get rid of the tape and and the lexan angles I used up to now. It is definitely an easy solution consisting of two L-shaped carbon fiber parts with two holes to mount them on the backbone of the chassis just underneath of the drive shaft; and one hole on the other side to mount a small post and the small carbon fiber plate (this part is doing its job since I bought it from Reflex Racing for my TC6.1) that holds down the battery:

And then I installed the dust covers. The fitting is nearly perfect, but I am sure dust will find a way. If it keeps out sand and stones, then I am happy.



Again the rear differential needed a full service. A mix of green slime and oil was pushed out and all over the left side of the car. I had enough of this and cleaned everything. I took an 8mm drill, widened and deepened the O-ring hole. Then I took Xray shock O-rings and slipped them over the outdrives. Lets see if this will solve the leaking from the outdrives.
#176
Last time out, I made video of the third run I made:
I think despite the lower grip level it is visible, that I can take more speed into and through the corner, and that the car stays flatter and/or is less rolling.
I think despite the lower grip level it is visible, that I can take more speed into and through the corner, and that the car stays flatter and/or is less rolling.
#177

Gregor and I went to Dasing today. A beautiful weather greeted the whole day. The sun was strong, but the temperatures didn‘t went up to high. We had 17 degree Celsius air und 29 on the track surface.
I definitly had too much to test and learn today. I tried different bodies, tires, springs and camber adjustments, while relearning this track.

I rediscovered the picture wall of clubchampions and got reminded of the three championships I won here before.


The good rhythm came around lunchtime. The car was not as easy to drive as I hoped. My last serious outdoor season was in 2015 and I had to adapt to the low grip surface. Which I have successfully done now. The car was good in all corners, but needs more steering in the corner entry for my liking. I think I will try softer springs next time. Body roll wasn’t a problem event without a.r.b. in front... So much to try... I need to make a good plan.
The dust caps worked like charm. Fine dust found its way, but sand stayed out.

#180
It's a project car. He has done amazing work on this car and all you can see is the colors on the car. He has poured hundreds and thousands into this project, much less all of the enginuity that none of you possess. You so-called racers are so basic and un-sophisticated... The shocks are readily available and have the lowest center of gravity. Call Tamiya and tell them to get to work! You won't see ULP shocks from them for 5 years. By then we'll have moved on to awesomatix/ serpent style setup!



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