Long time no come here la. Hope everyone is doing fine.

And nice car Jon. Now in shop cannot go Chinese forum. And HK trip cancelled =.=

>Szng: Good car. Glad to see you've remove the plastic bumper on the T-01. And yup, brake contact must be very precise or the jump wont be nice.

>Jon: Grats on 4th place.
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My car needs to reduce the rear bounce during the landing (prolly too front heavy). If I want to reduce the rear bounce without using mass dampers, I am thinking:

Wide tread==> less oscillation on the wheels & axle given same landing force
narrow tread==> more oscillation on the wheels & axle given same landing force

Similar idea can be applied on tyre surface area. Bigger surface area= less bounce

Do correct me if any part of the logic is wrong. Will test when I have the time.

How much time difference Jon?

Looks like the leading trend in Japan now is installation of mass dampers both front and back. From what I have observed, the standard placement is 4.7g X 2 in front (on the front bumper) and 8.8g x 1 behind (rear bumper). This should be a good aspect worthy of a discussion.

Few things that I think affects how effective mass damper works:

1. weight of damper
2. position of damper (high/ low, distance from front/ rear axle, layout of the dampers on the chassis, angle of damper movement)
3. amount of space for the damper to move.
4. how the car lands (front 1st, rear 1st, 4 wheels land at same time)

I think the concept of work done (Work=Force X Distance) applies well here. Also important will be the total weight of the dampers to use. I really find the current mass dampers to be a limitation. My dream part now would be weights 1-5g that is shaped small and round enough. But before Tamiya clear their dangun metal wheels as dampers, my movable FRP+weight set up by the side of my wheels should suffice. The key though would be to determine the amount of weights. (my digicam is spoilt now, so no pics for now, much apologies )

Best position I feel would be to have the dampers rest as low as possible to maintain a low CG and as close to the wheel as possible. What do you guys think?

faiz92 u measured the distance between the front and rear roller? Cuz the way I see it you do not have angle in front.

>Szng: Yes it is and I do not profess knowing all. Just some ideas after researching abit and putting them under Mini 4wd context.

>faiz92: icic. You may want to shorten the roller distance between the front and back after you get a new bumper. 12.5cm is a good distance. Shorter--> faster corners.

>bobby: very nice contrast of red and black there. I like it

szng have before after pics of your car?