m2fel

This is on another level! Just amazing

For the instructions simply search the internet for "the spawn 42039". It took me two more clicks to get the instructions...

This question bugs me a lot and a looked a little bit into it. Again I am no expert. Your looking at this in the wrong way. Changing the gearing with the same motor doesn't help as you will loose torque. You would need another motor with the same characteristics but a none loaded rpm of 2000 instead of BUT the problem is that at 50km/h you don't have the stalled current it is the point where the motor has not enough power to further accelerated but keep the speed thus the whole thing does not work... Link to a page with details on this topic

I am not sure but with the different gearing you double the rpm at the wheel but cut the torque in half. Even if the motor has its peak power at half the none loaded rpm the 50% loss in torque won't be compensated. Another problem is you can't just go from 50km/h to 100km/h. You have to hit the sweet spot where the motor rpm is actually 50% of the none loaded rpm.

I like the MOD a Lego set idea. But I would prefer mod whatever you like but keep close to the original structure or looks. So it doesn't matter if the helicopter goes spaceship, RC a none RC vehicle or add tons of functions. It doesn't need to be to strict as at the end the votes decide what wins and ppl. appreciate different styles. Pretty much take a set and go nuts :) This would be a contest I could join. I am short on time and skills to build a whole model and would feel bad as I can't match the the skills of others here. But I MOD a lot of Lego sets as I can focus on a single update and only have to make everything fit. Often RC mods but also gearboxes or additional functions. my proposal: take any Lego set and go nuts modding it using only Lego pieces. The forum will choose a winner based on what the majority likes most thus no restrictions needed :P

Is it possible to keep the Mindstorms subforum and include the posts in the technic section? I believe the Mindstorms topics will often be pushed down fast and if someone only checks now and then for Mindstorms or a first time user might really have to dick for those topics. The idea is that a new topic in the Mindstorms subforum appears in the technic one too and you can answer in both forums. Seams complicated but what if in the technic forum someone posts a topic with [Mindstorms] it also appears in the Mindstorms subforum. Could be useful for Mindstorms topics not to get lost. On the other hand, if [Mindstorms] or similar is used it should be easy to search for those topics. Guess I am thinking to complicated 🤯

I support to include Mindstorms in the Technic topic as I think it fits well and deserves more attention.

About copy cats. Maybe, just maybe it's the way a mining truck or excavator looks in real life :/

I like it. Lego should make small models like this :)

Hey, I believe BMS tend to drain batteries slowly when there is nothing else connected. As I am fare from experienced I hope someone with the proper technical background can comment on this. For my lego lipo battery box I placed a switch to disconnect the lipo from everything and added a lipo warner (saver). Not the buzzer as they are way too noisy for me but a super bright led.

@Phondly Hey, the design is neat. My lesson learned is to make it possible to disconnect the battery from the circuit. The step down converter in my lipo battery box always burned some energy (don't ask me why) and thus managed to deep discharge and kill the lipo while it was not used for some time : ( Not sure if it applies to your setup

I saw something similar before and it got on my 'I wanna build this one day' list. Your dumper looks good and seems to drive well. Any changes on building instructions or detailed pics of the mechanics and inside for a rebuild :)

This is awesome. I really like when something is build I haven't seen before and thought it was impossible! I think this is better than another vehicle moc and way better than the average 350€ Lego Technic vehicle! Makes me jealous of the creativity and building skills :)

This is awesome! I would like to do this to. But sadly I don't know any adults who enjoy Lego (technic).

@Danil there is nothing wrong with the buwizz 3. The numbers are correct and there is nothing wrong with how it is described. I would rate the data for the battery as expert knowledge. Most people don't wanna know how it works but here u can look it up if you know how to read it. The data for the buwizz 2 on the homepage (indicates a 2000mAh battery) does not 100% match the actual battery (1900mAh) but for the user it hardly makes any difference and maybe they changed the supplier and the page wasn't updated. But also nothing to worry. @BrickTronic u can't just add up the capacity for the buwizz 3 only because there are three cells. At 11.1V it can deliver 880mA in one hour this 880mAh. To triple the capacity you would have to go from 3s1p to 1p3s. Then it could deliver 3*880mA in one hour at 3.7V. Charging of lipo and li Ion batteries is, if there is more than one cell, done with a balancer which is connected to each cell and checks the load (current) of each cell while charging. If one cell receives to much load it is broken. Also there is a special 'charging curve' which needs to be followed. The is done by a charger and the whole electrics for this is inside the buwizz.

@Toastie ur right. But they way it is written on the buwizz homepage it looks like a 1s configuration as they use 3.7V for their calculation. 2300mAh *3.7V = 8.5Wh not a 3s config as seen on the blue battery... Trying to quote I accidentally deleted parts of my last post with the two cells at 3.7V and 950mAh. This is annoying. Sorry

@Toastie u need to look at the c rating printed on the battery. Yours has 5c and 1900mAh which means it can provide 5*1900mA = 9.5A max. The blue on is also 5c but at 880mAh which means 4.4A max. Most probably the limiting factor are the other electronics in the buwizz to make sure not to fry our toys

That's interesting. And proves I was wrong as they use a 1s battery :) the blue battery is 3s1p which means three 3.7v cells which sum up to 11.1v (series connection) the silver battery has two 1s cell in parallel connection (1s2p) which ads up the capacity of the cell but the voltage stays 3.7V. Thus they need a step up converter for higher voltages. Bit if the blue battery is from a buwizz 3 this is a 3s lipo and on the homepage the data implies a 1s lipo. I am confused. Would like to have someone else to look at this as I only rushed through the data :/

Still does not make sense. The battery in the picture reads 880mAh and on the buwizz page it is 2300mAh. You also need to be more careful with units. mAh*V=mWh Why buwizz does the calculation with 3.7V (the value of one lipo cell) is strange to me. General the actual voltage of the battery is used like in the picture: 800mAh*11.1V=8.88Wh=8880mWh And I assume buwizz uses a 3s lipo battery at 11.1V

If you have a look at the video BrickTronic posted it is explained (German) that 4 ports have proportional control. It is possible to slowly speed up the L-motors and control the position of the servo. All motors are none Lego. But he claims that only the new? generation of those servos work proportional. For two ports there's only on/off possible.

This combo is used in the mould king 17006 and seems to work good.

Hey, the axles holding the upper side of the springs look like they are already bending without load. Maybe you can add liftarms as reenforcement or use shorter axles (move the mounting points closer together). The steering looks like inverse Ackerman. This will cause stress for the whole system and make driving bad. I might be wrong. Can anybody confirm this? But I am really curious how the nxt motors will perform as they should have plenty of torque :)

I was bugged by the same question once. Then I build a simple, small vehicle with rwd using nxt motors for driving and steering (ackermann). The steering (radius) really improved when the driving motors adjusted the speed whilst cornering compared each wheel going at the same speed. If the vehicle has ackermann steering the center point of the steering circle is easy to locate and then some math will give you the different wheel speed due to the different radii the inner and out wheel have to go.

Selling this at 5k € is marketing at its best. Creating attention and getting talked about to reach new customers. Nothing to blame. It's a really nice Lego RC car :)

Hey there, as I got some experience in plastic manufacturing I will try to sum my what might be the problem ;). Firstly it is not rocket science but you need people who are well trained, know what they are doing and listen to them. Designing the mold and running the machine are both important as a good design provides better results. During manufacturing the setting often needs adjustment. Important are temperature, clearance, flow path, pressure and more. There are companies who produce at much higher standards and cost than Lego. Back to the part :) If the machine is not properly controlled there might be distortion in the final part. For example if the cooling time is to short or the injection pressure was to low the part can fall out of the machine in perfekt shape but withing hours of cooling down the shape changes... As a conclusion I'd say Lego tries to save money. Could be a poorly trained worker, a great worker deemed to control to many machines or the demand to generate a high output (save time and money which hits quality). It is really not a problem to build good parts on good machines if you don't push it too much. Same issues as the part shape is valid for the color ;)