wtcc

iTrader: (2)

I drew more parts:
- the TRF420 suspension is completed
- the SSBB dampers are added
- the chassis and todeck design was adapted to the wheelbase and relocated components

wtcc

iTrader: (2)

The CAD work is nearly finished.
I completed the most important parts, added electronic placeholders and the active toe holes. The front got shorter. I could move the servo 6.5mm closer to the differential. The bumper plates followed. The cable tunnel got a fitting form also. The anti-roll-bars were relocated and the mounts were drawn. In the rear I could use the mounts of the KRv2.5 without any change... nice The shocktower got a new design also. It came down and got thicker. The car was a great fun to design up to now

Here some CAD pictures for you to imagine what it will be soon:

AndreasHerold

Looks promising to me. What is the wall thickness of the cable tunnel? In case the lever for the rear shocks are custom made I would add a stiffening rib between the two arms.

Regards,

Andy

Mike Schumacher

iTrader: (37)

Should the motor mounted on other way? It seems the rotational inertia will cause under-steering... correct me if I'm wrong.

wtcc

iTrader: (2)

Every grey part is from Tamiya or other manufacturers. Blue is for 3D print and black are the carbon custom parts.
The cable tunnel has a wall thickness of 0.75mm.

Nicadrauspro4

I have thought of this too. But since he (wtcc) had done an earlier set up with the same motor position before, he probably has an idea on how to counter/correct that under-steer with this new design.

wtcc

iTrader: (2)

I never recognized any disadvantage with the motorrotation this way. Maybe the effect is too small...

CTE

Hi wtcc. Love your projects. I am currently working on a 4 gear transmission for my FF03, inspired by the Kentech blogs. I want to try and make the best front motor frontie i can! Anyway, as a next step after i test my transmission i have been thinking aboit a carbon chassis. Seeing your project got me thinking. What thickness carbon plate will you use? The TRF420 usibg 2.15 lower deck and 2mm top? I can get fibrelyte to cut out my designs quite easily, but they only have 2.5 or 2mm thickness options. Been thinking about 2mm lower deck due to the light weight of the rear end of the frontie design, and no motor torque to deal with. Any thoughts? What thickness are you using for yours?

wtcc

iTrader: (2)

I only have the option of 2.5mm and 2mm, too.
My chassis and topdeck are very slim. Two millimeters seem to be very thin. I will go for 2.5mm top and lower deck.
Any pictures of your project available ?

CTE

Interesting. Thanks for the feedback. I think i will start with 2.5 lower deck and 2mm upper. Mine will be very slim too as i will maintain the central battery and servo at the side layout of the FF03.

I haven't posted enough here to be allowed to post pictures yet, but this is my post from my Tamiyaclub build thread with a few pictures and explanation
​​​https://www.tamiyaclub.com/forum/ind...comment=788701

wtcc

iTrader: (2)

Cool! And you also talk about the motorrotation there. Did Kenneth mention that?

CTE

There is a tonne of blogs on the development of his fwd cars, which are brilliant, but this is the one where he talks most aboit the 4 gear transmission. Follow the links at the bottom of this post to follow it through to the 2017 car and further

https://kentech.wordpress.com/2015/0...-car-20739548/

wtcc

iTrader: (2)

Time for a designfreeze!



I did a lot of detail changes in the front area regarding servo position and gearbox geometry. The latter was refined a lot. In comparison to the previous chassis, the car got 7mm shorter in front.
Today I prepared the data for the manufacturing. Compared to the KR v2.5 the number of parts is very small: 10 to 54




Yesterday evening I disassembled the MF chassis and cleaned every part. It is a car without skeleton



I couldn't wait and started building the suspension. I will also do the turnbuckles soon.

Now it is time to wait. Shapeways is working and I need to wait for an offer for the carbon parts...

wtcc

iTrader: (2)

Having no patience and a 3d printer at home leads to this



This car will become a beauty!

Mike Schumacher

iTrader: (37)

You would experience under-steering (or getting more traction in the rear) when throttle is on at corners.