piterx Posted June 10, 2013 Posted June 10, 2013 Hi everyone :) As someone of you saw in my other topic, about the LEGO buggy weight, i'm working at my new rally car. It's made to drift and perform some nice stuff such as a gymkhana :P Here's the chassis for now... :) It has 2RC motors that DRAIN energy like a vampire from two lipo batteries and low them after 20-30 minutes play XD As every motor is powered by a battery, i've used a differential inbetween the two motors, to compensate lack of power.... and it works great to protect motors from being damaged. There's another differential that can be locked to achieve narrower drifts Out of performances, the part that makes me really happy of this chassis is the macpherson suspension in the front axle and mainly the short travel suspension :) once i'll finish the car i'll post pictures of all the details hope you like it Quote
legomuppet9 Posted June 10, 2013 Posted June 10, 2013 Ok.. I really need some buggy motors that things performance is awesome Quote
Balrog Posted June 10, 2013 Posted June 10, 2013 I would say, that 20-30 minutes of continouos play-time is pretty good for a lipo battery like that. And it goes pretty fast as it seems. Comparing this to my 1:10 RC car, which has a decent motor added and ball bearings on all major moving axles AND a 3500mAH battery, I would say, play time is pretty similar. Quote
rm8 Posted June 10, 2013 Posted June 10, 2013 (edited) Hope that body will not destroy all drifting performance. For me better drifting chassis is small with 43 tyres, without suspension and ONE buggy motor. One of the reasons- scale speed of small car is much better other reason - it is hard to drift with bigscaled car indoor, and it is also dangerous for parts. Small cars with bigger scaled speed is better controllable. So the fun is higher with small scaled cars. Sure you will come to this conclusion later;) Did you see my drifting car? Edited June 10, 2013 by rm8 Quote
Nazgarot Posted June 10, 2013 Posted June 10, 2013 Out of performances, the part that makes me really happy of this chassis is the macpherson suspension in the front axle and mainly the short travel suspension :) Hi, Great chassis! I would love to see some closeups of the macpherson front suspension. -ED- Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 OH! I figured there wouldnt be rear suspension, and here I was thinking of complicated ideas to make small double wishbone suspensions and placing buggy motors in odd places I also figured you'd place a battery up front, so will I, good luck with the build, it's great so far! Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 Hi, Great chassis! I would love to see some closeups of the macpherson front suspension. -ED- Hope that body will not destroy all drifting performance. For me better drifting chassis is small with 43 tyres, without suspension and ONE buggy motor. One of the reasons- scale speed of small car is much better other reason - it is hard to drift with bigscaled car indoor, and it is also dangerous for parts. Small cars with bigger scaled speed is better controllable. So the fun is higher with small scaled cars. Sure you will come to this conclusion later;) Did you see my drifting car? nah the body will be quite light :) i don't think it's gonna be heavier than 300g yeah i made one with 43 tyres some weeks ago but i wanted to add something new such as the macpherson strut and the lockable differential....and mainly i like building bodies too :D so i use to scale my models to panels more than wheels this car has perfect proportions for wheels size and panels "it's dangerous for parts" oh yeah it is...this chassis dismounted itself 2 or 3 times due to crashes caused by my noobness at driving rc cars i guess i need to practice a little bit before shooting the video your car was one of the reasons why i spent 90€ to get these two brand new motors lol OH! I figured there wouldnt be rear suspension, and here I was thinking of complicated ideas to make small double wishbone suspensions and placing buggy motors in odd places I also figured you'd place a battery up front, so will I, good luck with the build, it's great so far! yesterday i've tried to add rear suspensions...then i just gave up mainly because of the two differentials that take too much space....and i didnt want to get rid of them because they're really useful ^^ Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 20-30 minutes? I'm glad now because my batteries last for hours...And I'll be experimenting with suspension so if I come up with an ingenious solution I'll let you know Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 (edited) probably also less than that XD lets say 15-20 yeah coz you're using alkaline batteries and im using lipo :) Edited June 10, 2013 by piterx Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 probably also less than that XD lets say 15-20 yeah coz you're using alkaline batteries and im using lipo :) Nope, mine are Lithium polymer too, to be specific Lithium Iron phosphate Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 hmmmm dont know what to say actually... ill check with more precision next time :P Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 Now I should be set to build this car, bought a third RC buggy motor and two more wires for connecting them to the receiver, time to start building! Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 please build a rally replica! i love them :D Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 Well the way I see it there are two options: 1) no suspension which is efficient and easy OR 2)use this suspension I made just now: ^I have no idea how to get the buggy motors to deliver power to the driveshafts while still acting as if there was a differential between the wheels... Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 eeeehhhh....hmmm i dont think you can do that with that configuration at the moment...but you can find a way im sure! i like the way you added the new part from the 42000 Quote
z3_2drive Posted June 10, 2013 Posted June 10, 2013 Well right now i'm puzzled, so i'll choose the easy way :D either that or suspension but no diff... Quote
piterx Posted June 10, 2013 Author Posted June 10, 2013 well with the diff i've noticed it drifts anyway but it's more controllable...otherwise it's a wild animal :D Quote
zux Posted June 11, 2013 Posted June 11, 2013 For drifting you need to have rear axle's diff locked i.e. no need for LEGO diff here, otherwise there will be only one side wheel spinning. Quote
Nazgarot Posted June 11, 2013 Posted June 11, 2013 I love the simple, jet functional design you made for an macpherson front suspension. It is great. What spring did you use? I guess any spring from the original Lego "shocks" could be used, but I can't see what hardness you are using... -ED- Quote
Someonenamedjon Posted June 11, 2013 Posted June 11, 2013 Where did you get the springs, and have you tried some plastic wheels yet? Quote
z3_2drive Posted June 12, 2013 Posted June 12, 2013 Where did you get the springs, and have you tried some plastic wheels yet? I've built the chassis today, and it drives awesomely, except turning circle is very large, but the oversteer makes up for it. All I have to say is, it doesnt need plastic wheels! It would be too slow and uncontrollable if it had plastic wheels, and with rubber you can drift, control your drift, and achieve really high speed!! i will take a picture and upload tomorrow just in case I decide to build something else... Quote
piterx Posted June 12, 2013 Author Posted June 12, 2013 I love the simple, jet functional design you made for an macpherson front suspension. It is great. What spring did you use? I guess any spring from the original Lego "shocks" could be used, but I can't see what hardness you are using... -ED- the spring im using is a custom one but i think it should be like the soft one from lego....but im not sure that i'll keep on using this one till the end :) it's a work in progress still eheh I've built the chassis today, and it drives awesomely, except turning circle is very large, but the oversteer makes up for it. All I have to say is, it doesnt need plastic wheels! It would be too slow and uncontrollable if it had plastic wheels, and with rubber you can drift, control your drift, and achieve really high speed!! i will take a picture and upload tomorrow just in case I decide to build something else... yeah it totally doesn't need plastic wheels at all XD about the turning circle: do you have a differential? that makes some difference :) Quote
Doc_Brown Posted June 12, 2013 Posted June 12, 2013 This is soooo awesome, I can't wait for a detailed body! :thumbup: Quote
z3_2drive Posted June 12, 2013 Posted June 12, 2013 Yes I have a differential, the problem is the steering angle with this design is not the best, but it turns slowly enough that you are able to control drifts and transition into the other direction Quote
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