1188Likeswtcc's TT-02 KR
03-29-2019 | 10:27 AM
#138
Thanks for all the nice words, guys!
@nutdriver: I follow Christians work as close as possible from my part of the world. All I saw is great and he even sells his cars to a wide audience. When I saw the first carbon fiber arms I always wanted to do something like this myself, but never got in the situation... Well, until now
@jag88: That is exactly what I am thinking, too
Still not as easy as it seems from the pictures. With the TT02 drivetrain the steering and many other details like the motor mount and position will give smaller and bigger headaches. I would also prefer to design a middle motor belt driven pro chassis (even more headaches). Maybe I am lucky and motivation will come, some time.
I continued with details. Some small mistakes were corrected. I concentrated on the camber links and , since I decided to buy the ULP shocks soon, on the shock tower geometry. There it is interesting to see that Xray kept the shock angles in front, but changed them in the rear. It looks on the corporate pictures as if the rear shocktower holes were mostly moved vertically down and just half a millimeter to the outside... I stayed with the angles of the T4`15.
I draw the Awesomatix and Xray ball cups, checked for collisions and pushed the outter ballstuds a millimeter more to the outside (transversal). The ULP shocks are four millimeter shorter than the SLPs. The chassis looks crazy low now. The camber links are the highest point, just a tad higher than the differentials... I like that very much!
@nutdriver: I follow Christians work as close as possible from my part of the world. All I saw is great and he even sells his cars to a wide audience. When I saw the first carbon fiber arms I always wanted to do something like this myself, but never got in the situation... Well, until now
@jag88: That is exactly what I am thinking, too
Still not as easy as it seems from the pictures. With the TT02 drivetrain the steering and many other details like the motor mount and position will give smaller and bigger headaches. I would also prefer to design a middle motor belt driven pro chassis (even more headaches). Maybe I am lucky and motivation will come, some time.I continued with details. Some small mistakes were corrected. I concentrated on the camber links and , since I decided to buy the ULP shocks soon, on the shock tower geometry. There it is interesting to see that Xray kept the shock angles in front, but changed them in the rear. It looks on the corporate pictures as if the rear shocktower holes were mostly moved vertically down and just half a millimeter to the outside... I stayed with the angles of the T4`15.
I draw the Awesomatix and Xray ball cups, checked for collisions and pushed the outter ballstuds a millimeter more to the outside (transversal). The ULP shocks are four millimeter shorter than the SLPs. The chassis looks crazy low now. The camber links are the highest point, just a tad higher than the differentials... I like that very much!
03-30-2019 | 11:59 AM
#139
I did another change to the rear shock tower. My goal was to make it more compact, smaller and reducing the lever of the bodymounts in case of a crash. The body mounts went to the inside of the shocks. The distance between the mounts is reduced to 59mm. It is a little bit too close for my liking. Tamiya TT02S rear body stays are 65mm at distance. I will have to sleep over it 
For the 3D-print-parts I decided to have a design freeze and gave the order to print:
I will order the carbon fiber parts early next week and hope to have the V2 running in two weeks
For the 3D-print-parts I decided to have a design freeze and gave the order to print:
I will order the carbon fiber parts early next week and hope to have the V2 running in two weeks
04-01-2019 | 12:00 AM
#140
The body post topic didn't leave me alone on sunday. After checking different positions for the original Xray T4 rear body post, I had to realize, that it will not meet my requirements. My new design is mounted on the inside of the shocks and then curves around the top to the outside before rising straight up. The part below the mounting point will hook with a notch in the shocktower to prevent the bodypost from rotating. Another extrusion on the upside of the shocktower will route the force from above (downforce generated by the body) directly into the shocktower. The mounting points for the body are now 82.5mm wide.
In the evening I also made a upper bumper plate to delete the Xray look and the plastic part I used up to now. It has a slightly more aggressive look.
Last edited by wtcc; 04-01-2019 at 01:09 AM.
04-02-2019 | 11:16 AM
#141
In todays news: The order for the carbon fiber parts is out! I received the ULP shocks, ball studs and Awesomatix ball cups. Tamiya turnbuckles are on its way like RC mission short damper rods for the ULP schocks.
...and there are more CAD pictures
Today I finalized the dust covers, that I started to design three weeks ago for the first generation KR. Outdoors I expect al lot of dirt flying around and little pebbles trying to ruin the gears. Of course I don't want to install the old covers. The custom designed covers fit nice between the carbon fiber plates. There are top covers and lower covers. The latter consist of the plate shims that grew little walls between them
The top covers are attached with one screw only and can be taken off for whatever reason...
...and there are more CAD pictures
Today I finalized the dust covers, that I started to design three weeks ago for the first generation KR. Outdoors I expect al lot of dirt flying around and little pebbles trying to ruin the gears. Of course I don't want to install the old covers. The custom designed covers fit nice between the carbon fiber plates. There are top covers and lower covers. The latter consist of the plate shims that grew little walls between them
The top covers are attached with one screw only and can be taken off for whatever reason...
Last edited by wtcc; 04-02-2019 at 11:49 AM.
04-03-2019 | 10:03 AM
#144
The geometry of the dust covers is a little more complicated. I am afraid to miss some key spots.
With my old 3D printer I made the covers and will check the fitment in the coming days.
With my old 3D printer I made the covers and will check the fitment in the coming days.
04-04-2019 | 09:36 AM
#145
Positive news from all my part manufacturers:
All parts are already shipped and on their way to my home
The body posts arrived today (even though I ordered them later than the suspension parts):
All parts are already shipped and on their way to my home
The body posts arrived today (even though I ordered them later than the suspension parts):
04-04-2019 | 10:33 AM
#146
04-05-2019 | 11:12 AM
#147
The time of CAD pictures is finally over. I received all prototype parts and started building and assembling today.
Up to now everything fits better than expected. Just the Awesomatix ballcups for the arm attachment made trouble. Three of five cups fit perfectly. The other two make the arm getting stuck. Oh and one cup fell apart on its first mounting...
I overcame the problem and finished two thirds of the rear suspension and began with the front, too.
Up to now everything fits better than expected. Just the Awesomatix ballcups for the arm attachment made trouble. Three of five cups fit perfectly. The other two make the arm getting stuck. Oh and one cup fell apart on its first mounting...
I overcame the problem and finished two thirds of the rear suspension and began with the front, too.
04-06-2019 | 09:48 AM
#148
This will be one of my favourite post if I should ever look back on this project in the future.
The car transformed into something beautiful. Chassis and custom parts just fit together nicely. Somehow both compliment each other and make their counterpart look more technical, more functional, more quality. At least in my eyes. The proportions of the tub match in harmony with the front and rear end. I am very happy:
The chassis looks quite complete already (except for the shocks of course), but there is still a lot of detail work to do.
I decided to minimize the orange colour and to invest in more blue gold. The screws and nuts will be exchanged soon.
The car transformed into something beautiful. Chassis and custom parts just fit together nicely. Somehow both compliment each other and make their counterpart look more technical, more functional, more quality. At least in my eyes. The proportions of the tub match in harmony with the front and rear end. I am very happy:
The chassis looks quite complete already (except for the shocks of course), but there is still a lot of detail work to do.
I decided to minimize the orange colour and to invest in more blue gold. The screws and nuts will be exchanged soon.