F0NIX Posted January 13, 2012 Posted January 13, 2012 (edited) Hello again, Here is another of my attempt to make a small car suitable for the minifig-sized LEGO city streets. And it has motorized steering and propulsion. In this test I was using micromotors both for steering and propulsion. The car is too small to fit both the IR-tower and battery box directly on to the body. One solution is to have a trailer behind that is containing the battery box and this car is draging it around. I could also try to make this car a little longer so it would fit both of them. But then the steering radius will be poor with this type of steering. I have to find another solution for the steering giving the car a smaller steering radius. (Click on images to show larger versions) And a little video showing of how fast (or slow) it goes and how it steers. (Click on image to show the video, I dont know how to embed it to the forum post) Dont look at all the mess around the building table ;) Edited January 13, 2012 by F0NIX Quote
lightningtiger Posted January 13, 2012 Posted January 13, 2012 Interesting idea, perhaps putting it into a 6 wide vehicle will allow easier installation of components and electronics....maybe a semi-trailer eh ? Clever designing there 'F0NIX' and Brick On Drive On ! Quote
Alasdair Ryan Posted January 13, 2012 Posted January 13, 2012 The stearing is not bad given the size of it,you neend to add some weight to the back of it,so that the rear axle keeps traction. Quote
F0NIX Posted January 13, 2012 Author Posted January 13, 2012 Interesting idea, perhaps putting it into a 6 wide vehicle will allow easier installation of components and electronics....maybe a semi-trailer eh ? Clever designing there 'F0NIX' and Brick On Drive On ! Thanx! This car is actually 6 wide. If you look at the first picture where it has the body on it is 6 wide x 14 long and about 4 bricks high. Building it in a semi-trailer? Uh... that was a good idea, but I think someone already have done that, I wonder who was it? But, I will try to lengthen this car a bit so both the batterybox and the PF IR-tower would fit. And then it will also get enough weight on the back wheels. I have also looked at the solution LEGO has used on the set 9390. Maybe that could be done smaller and with better turning radius? Quote
lightningtiger Posted January 13, 2012 Posted January 13, 2012 Sorry, dude....half a sleep still....6 wide it is. Lengthening the vehicle and using a steering mechanism like in model RC cars of a lever pulling and pushing the steering axle for left and right ? Hence the steering motor could be some distance from the front of the car, hopefully it might allow a better turning circle. Quote
F0NIX Posted January 13, 2012 Author Posted January 13, 2012 Lengthening the vehicle and using a steering mechanism like in model RC cars of a lever pulling and pushing the steering axle for left and right ? Hence the steering motor could be some distance from the front of the car, hopefully it might allow a better turning circle. It is not how the steering motor is mounted that make any problem, it is that the tyres is touching the inside of the fenders while turning. Since they rotate around the center of the car. If the front wheels rotate in the horizontal plane around their own center (or as close as possible to their own center) they would not need so much space to move and thus giving better steering-radius... (I hope). Look at how the steering on the 9390 Mini Tow Truck is made. It is really small, just 5 wide. But the wheels are big and that car is about 9 wide Quote
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