Racing tracked vehicle

[Bigant]

saw this and i couldnt help but think... Ripsaw mini...
http://www.greatamericans.com/video/Rip ... d-Howe-Tec

one day i shall own one of these monsters...

[Kemenb]

I tried not to copy ripsaw, but they made great design and it is hard to improve!
I hope when I finis my Mad Cat it will go slimier to that!
Local company told me that they know a gay that works with a rubber, I will try to make rubber tracks. I have to lighten this thing as much as possible to get better performance!

I changed all my bullets from 5.5mm to 8mm, there was some "turbo lag" and then I found why. Chinese lipos had poorly soldered connectors. Also I changed timing to 5 (low) and this gave me more torque, and better start from standstill. Tracks went on a diet too!

Here is some bed video I made (before changing bluets and timing) with a phone duck-taped to my transmitter. Well it isn't easy to drive and look at the screen at the same time. Also there were some moving things cold people that could damage my ride if I hit them
http://www.youtube.com/watch?v=EDgXt...eature=mh_lolz

I have to install a gyro to keep this thing going in a straight line. Those motors don't have equal outputs. One is rated at just 8707W and the other puts out massive 10687W (telemetry from mamba XL2). Trimming on transmitter is out of the question, because then one ESC will be just at starting point, and there may be a glitch ant this thing will fly off the table.

[Dietrich]

Hi Kemenb,
Brilliant on the YouTube video ...The Tracked vehicle is stunningly fast.....You have done a Wonderful Job there of creating a vehicle from parts that you designed.

Do you have any idea of the speed that it can actually go in KPH ?

Regards,
Alb.

[Kemenb]

Thanks!
I used a phone running used sports-tracker and got 31,7km/h driving over grass and snow, and was also the last time I ran it. ESC on 1/8 buggy went in a puff of smoke do to snow/water and I stopped driving in winter.

I got HK410b gyro, it worked ok on a buggy, cant wait to test it. Gyro has remote gain wire, so whenever I would want to move the vehicle by hand I will have to shut down gyro, otherwise gyro will try to correct vehicles trajectory and spin tracks like crazy.

[Dietrich]

Hi Kemenb,
Please can you explain what you will improve on the Racing Tracked Vehicle by adding a gyroscope ??....Will it help in stability control and prevent the vehicle from turning over if it hits a bump ??
Alb.

[Kemenb]

Hi, no it is no mechanical gyroscope, it is an electronic helicopter head and hold gyro.
When I plug lipos in, gyro will initiate itself and get locked trajectory. If I try to turn vehicle by hand to the right for example gyro will try to turn vehicle in the left till it points to previous trajectory. Unless I turn my vehicle by transmitter gyro will try to make sure it stays on the same trajectory no matter what!

I tested gyro in S8BXe Team 1/8 buggy and was driving up and down snowy street (it wasn't plowed yet), every time buggy hit a bump, or there was a hole on the road gyro steered just a tiny bit to the left and right to stay on same trajectory. I love driving on snow and drifting true turns, but when driving with gyro it was almost impossible to drift or over-steer.

One CC2028 motor is more powerful and they dint have same power/rpm curves. Whenever I accelerate my tracked vehicle starts to turn to the left in low rpm ant to the right at higher rpm. This means I have to constantly adjust it and steer, it is annoying! It high speeds steering is very sensitive!
If I set trims to the left there is a chance one motor will be out of neutral zone and I don't want that. Setting separate throttle curves to each ESC wold be pain the neck to get right-almost impossible. Let that little electronic box do all the work and I will concentrate on driving!