Boxerlego

Thanks! That is a great idea jon.

Hi everyone!

WOW! This is interesting. I like to point out that Jar jar binks killed star wars and the ripple of this was felt by LEGO. So that begins said jar jar binks is the one that almost killed LEGO. Amazing X-wing...that was humongous.

Thanks Doc! I am using the 8881 battery box which is creating the very high center of gravity. The way kub0slaw made his Monster truck was not really for the 8881 studless battery box... He made the monster truck around the 8878 brick battery box and sits as low as it can go. The 8881 studless battery box in the design had to be raised a vertical stud making the body design go up two studs. So yea it is very top heavy. I like it though... I already done a end over end roll over going down a couple of step Thanks Someonenamedjon! You are certainly right about it begin very tall and very jerky. I had to raise the body up two studs so the 8881 battery box could fit and the servo motor definitely wants to make the body frame jerk to the left or right when trying to turn.

Is it the Mach 1? Congratulations on the 11,000 views.

Ghost Digger I created this monster truck from instruction provided by kub0slaw. There is a picture link down below to his brickshelf where instructions are at and the his video as well. I want to tell you that his monster truck inspired me to finish the XL motor upgrade. Then when upon completing the first XL motor upgrade and by being able to test the RPM of my two motor that is when I discovered that my two motor ran at different RPM and I started doing all the motor magnet test video, uncovering how two motor of the same design are able to spin at two very different rpm. Now all that is done and been figure out. I can finally show you the incredible power and speed of the upgraded XL motor. I made a quick teaser video showing this. I plan on making a better video in the future. Name: Ghost Digger Class: Monster Truck Power: 6 rechargeable AA batteries in the 8881 battery box Motor: 1 servo motor for all wheel steering, 2 upgraded XL motor for the front and back drive axle. This is a big picture.

Nice job on this! Everything looks good and strong so far. That gear train test was awesome.

Update: Neodymium Motor magnets I was searching around on the internet on motor magnets and I came across these N45 neodymium motor magnets on eBay... There is a picture of them next to a dime to establish there size . I thought this was a good find for the motors cause their around dime size... Another Update: Strengthen the Permanent Magnets I've been doing some test on the demagnetize motor magnets to restore their strength as the How to recommend. The "How to" works and the demagnetize motor magnets strength has been restored. Now I've not tested the RPM to see if the motor spins around the same rpm as before. The freezer definitely improved the strength in the already strong neodymium magnet. -BL

Yes, I already have done some test with the motors connected up to both version of the Power Function IR receiver. However both my motor that have the pinion gear have been demagnetized and both motors drive shaft turn around 440Rpm. Now one demagnetized motor works nicely off one battery box and V2 IR receiver but when you use servo motor it makes the vehicle come to a on and off and on and off ... situation. Yes the XL motor case still fits. I will say this. I thought that I had somehow strengthen the permanent magnetic filed in the motor by leaving it on a powerful neodymium magnet for over a long period. This is what got my attention because it was something that with out intention. Now it was a mystery to me why one off my motors was able to spin faster than the same motors. At first I thought I had two different version of the same design running at two different speeds. But when I recognized the fact that some how the neodymium magnet made the motor turn faster. I was very interested in this because it was something about magnets. Now when I was trying to figure out how to strengthen the permanent magnet I was very cautious on not to demagnetize it. Now I did not relies that you could demagnetize a motor magnet thus making it turn faster. During the time I thought that demagnetizing the permanent magnet would make the motor run slower so strengthening the permanent magnet field was the way to think. I have added some notes in the video. I hope this helps better understanding with the video.

Now that I've done additional testing on this magnetic effect. I concluded that the faster spinning motor was caused by the reducing the strength on the motor magnets. This was a result of stronger neodymium magnetic field coming in contact with the magnet filed of the same polarity in the motor and thus demagnetizing the motor magnet causing it to go faster and with less torque as well.

Nice work on the swapping the springs. Did you use ant tools to take the shocks apart or did you unwrap the springs off the shocks. Overall the crawler looks great and very tough.

Update: I have reworked the axle member. This axle design replicate what the 9398 crawler does and that is to have the motor on the drive axle and instead of rack and pinion it uses a pneumatic cylinder for steering which also sits behind the motor. I've built the axle design around the upgraded XL motor so it can use the XL motor here. The pneumatic cylinder that sits behind the motor is mm away from touching the motor. There are picture down below for you to click on and see. The first two pics show the range of the cylinder.

Thanks Doc_Brown! I plan on doing this magnetic effect on the L-motor and see how much the rpm is but first I need to do some more research. I've successfully increased the total rpm on the motor(420rpm) in both direction to 460 rpm, and some how the motor that had the JB weld epoxy that was 260 rpm @9V is now 480 rpm @9V. That is great to know that you have experience with pinion gears and such. Here is a link to a pinion gear that maybe a match to the one found in the XL motor. The pinion gear is said to be for a S280 Gearbox.

That is huge.

Edit: I am remaking this video.

That is truly amazing design. Nice work!

I never consider the idea of spray painting the parts. I have thought about a putting a Rc car body on a Lego chassis.

Be careful with putting the pinion gear on. I thought about doing that but I was afraid that the pinion gear would crack if I put it on the 2.3mm driveshaft. I've been searching for pinion gear with a 2.3mm hole that would be identical match to the pinion gear for the 2mm driveshaft from the time I started this topic. Yea, I've seen many people think the same thing. weaker magnet faster motor I am going to show more test of this motor and get the multi-meter on it because it does everything better and some other interesting stuff like so... In the video you can see that the one side of the faster motor was able to pick up some ball bearings. Well the motor that spins faster only spins 420 rpm clockwise. In fact when you power the motor in the other direction it spins around 380 rpm counter clockwise. Basically, I am starting to understanding that the unused part of magnetic field is now being used resulting in faster RPM and more power.

Nice! That is a good motor, the only problem with the motor is the 2.3mm driveshaft size. Now this does not mean you cant use the motor with the XL gear planetary gear box. The pinion gear is the major problem here because the pinion gear that is in the XL motor fits on the 2mm driveshaft. There is probably a pinion gear that can fit with the 2.3mm driveshaft and inside the XL gear box as well, finding it is the problem. I will get a detailed picture up of the pinion gear.

Here is a deeplink of the M-motor along with a comparison picture of the two planetary gear boxes for the M and L motor. I've open up one of the motor I recently got. To have some to compare against when I open up the motor that spins 420 rpm. I've just done a simple test to determine if the magnet is stronger than the other on the motor that spins 420 rpm. Well it appear that one of the magnets is in fact stronger than the other magnet. In fact the weak magnet on the motor barley showed any attraction in the simple test; Also the magnets that are on the all motors that spin around 260 rpm are stronger than the magnets in the motor that spins faster than them. I will get a video of this simple test showing strength of the magnets on the motors along with the speed of the fast motor. -BL

Update: 48 hour test I've tested the motor that was in the freezer (for about 2 days) with the n50 Neodymium magnets and the motor still runs around 260 RPM . I am starting to see that the problem with that test was that the motor with neodymium magnets was not stuck to a metal mass like how the first motor was stuck underneath the metal desk. Before I start doing more test on strengthening the permanent magnet on the motor. My next test is to figure out if the faster motor magnets are at equal level of strength or if one is stronger than the other. If one of the magnets are stronger then the other that could be a result from the strengthening of the permanent magnet with a stronger magnet. If the magnets are at equal level of strength, then that would possibly show that the motor came from the manufacturer with the stronger magnets. When I can determine a test on how to measure the strength of the magnet is on the motor then I will be able to compare and proving that a magnet is indeed stronger than another. -BL

That gear box is not a mistake, maybe the motor is a dud but the gear box is not. That gear box can connect to any motor that will fit. 15$ for that gear box is not bad, one XL motor cost around that price so you did well. The L-motor is slightly smaller than the FC-280PC motor. And the M-motor is smaller than the L-motor, However, the "planteary gears" in the gear box on the M and L motor are exactly the same. I will get some pictures up of this along with the m-motor as well. Here is a link to the 8881 batter box. Check it out, see it for yourself.

Nice work on the cab over and trailers. Everything looks incredible. The details are spot on.