Rockbrick Posted September 9, 2013 Posted September 9, 2013 Third Party tyres is the way to go for any serious outdoor use - Plus being a purist it means you preserve the original ones for indoors like the manual says (ok so the wife doesn't like dirty tyre tracks in the house) Quote
Junpei Posted September 9, 2013 Posted September 9, 2013 Third party tires always look great! I'd love to see a crawler with 1 or 2 buggymotors and dual servos (using the large ball joints to transmit drive and having a servo on each axle). By the way, what happens if a u-joint pops apart in a large ball joint? Is it lost forever? Quote
Dreadredbeard Posted September 9, 2013 Posted September 9, 2013 Third party tires always look great! I'd love to see a crawler with 1 or 2 buggymotors and dual servos (using the large ball joints to transmit drive and having a servo on each axle). By the way, what happens if a u-joint pops apart in a large ball joint? Is it lost forever? No, the ball joints pull right apart :) Quote
Technyk32231 Posted September 9, 2013 Posted September 9, 2013 If you want maximum speed, use the gears shown on the left. If you want maximum torque, use the gears on the right: That picture is massive... Just assembled this set, and I'm a bit irked by the low speed. Gonna replace the L motors by XL motors, which results in increased unsprung weight, but whatever. This also requires an additional IR receiver, which leaves me with an unused IR output. So, I will also add a winch. The unsprung weight is already pretty large, and you don't really notice the effects of it at these slow speeds. I'm having tremendouse difficulty trying to get XL-motors into this crawler. I would love to see someone put up som pictures with some ideas. I don't know what it is I have access to some goot spare parts but my mind is frozen I can't figure out how to do it. its just one of those mental blocks. Maybe this will help.http://www.flickr.com/photos/42960909@N06/7878974836/in/photolist-d1eNHJ-dBjjwU Quote
JM1971 Posted September 10, 2013 Posted September 10, 2013 I'm having tremendouse difficulty trying to get XL-motors into this crawler. I would love to see someone put up som pictures with some ideas. I don't know what it is I have access to some goot spare parts but my mind is frozen I can't figure out how to do it. its just one of those mental blocks. Gearing the XL motors up too much puts a lot of strain on everything between the motor and wheels and starts to pull everything apart, also I found some of the rods had a powdery residue either side of the cogs after only a short time. Quote
kevman Posted September 16, 2013 Posted September 16, 2013 anyone put the rc buggy 5292 motors in this crawler? I just got a pair of them and want to try this out. Quote
clarkdef Posted September 16, 2013 Posted September 16, 2013 Buggy motors in the crawler will turn it into a monster truck :), will lose it's torque but ahh who cares, high torque feels too robotic. Flat surface fun is where it's at! Especially two of em racing. Quote
Junpei Posted September 16, 2013 Posted September 16, 2013 Buggy motors have nearly the same torque as XL, just a matter of powering them and the steering servos.. Quote
750ACE Posted September 16, 2013 Posted September 16, 2013 (edited) Buggy motors have nearly the same torque as XL, just a matter of powering them and the steering servos.. No, XL motors have nearly 3.5 to 4x more torque than buggy motors. That's why the rpm and mechanical power is less than a buggy motor. http://www.brickshelf.com/gallery/Sariel/ideas/motors-chart.jpg Edited September 16, 2013 by 750ACE Quote
clarkdef Posted September 16, 2013 Posted September 16, 2013 The buggy motor can be geared down, if geared down to the same rpm as the xl, it should have more torque, not sure as I don't have a xl motor to test against. But as long as friction didn't kill the gains, the math says so. Quote
Saberwing40k Posted September 16, 2013 Posted September 16, 2013 The buggy motor can be geared down, if geared down to the same rpm as the xl, it should have more torque, not sure as I don't have a xl motor to test against. But as long as friction didn't kill the gains, the math says so. Problem is, that's exactly what would happen. The friction would most likely kill any gains you made. While in theory the 5292 motor would be more powerful, the gear reductions and associated friction losses would negate any benefit, not too mention the fact that those motors have to have one battery box and two receivers a piece. While it sounds good in theory, in practice XL motors are better in almost every way. Quote
Junpei Posted September 16, 2013 Posted September 16, 2013 Geez, I guess I read that wrong... I thought for some reason that the RC motor had the same torque as the XL but at greater RPMs because of the increased voltage. I guess they're really not an option as they would need a lot of gearing to have any kind of torque. Thank god, those motors are so expensive, I can buy 3 XLs for the same amount as a single buggymotor. No pf to 9v cables either. Has anyone ever tried NXT motors? Quote
Technyk32231 Posted September 17, 2013 Posted September 17, 2013 Flat surface fun is where it's at! But it's a crawler... Quote
Rockbrick Posted September 17, 2013 Posted September 17, 2013 With the correct gearing buggy motors could be 'interesting' I have 2 buggy motors waiting plus PF to 9v cables and just having too much fun with the stock 9398 to want to take it apart but watch this space... Quote
Someonenamedjon Posted September 18, 2013 Posted September 18, 2013 Geez, I guess I read that wrong... I thought for some reason that the RC motor had the same torque as the XL but at greater RPMs because of the increased voltage. I guess they're really not an option as they would need a lot of gearing to have any kind of torque. Thank god, those motors are so expensive, I can buy 3 XLs for the same amount as a single buggymotor. No pf to 9v cables either. Has anyone ever tried NXT motors? http://thinkbricks.net/?p=603 Quote
clarkdef Posted September 18, 2013 Posted September 18, 2013 But it's a crawler... Yes but I read in previous posts that someone wishes to chase a cat Quote
Technyk32231 Posted September 18, 2013 Posted September 18, 2013 Yes but I read in previous posts that someone wishes to chase a cat Oh, in that case, go for it. But cats are really fast... I have 5 of them, and they run away from even my fastest cars. However, one of my dogs barks at them. Quote
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