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Everything posted by Zerobricks
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RC motor & PF
Zerobricks replied to MarcoB's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
PF receiver has a curent limit of 800mA which sii not enough for a beast like RC motor, si it shuts down untill the limit is passed again, therebye making the typical on off pulses. -
Coaxial helicopter
Zerobricks replied to Zerobricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Thanks. The reason they dont spin in other direction is to prevent them from overloading when switching motor polarity. -
Coaxial helicopter
Zerobricks replied to Zerobricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Its a simple worm gear which slides over 2 8 tooh gears. Those 8 tooth gears are also conencted to 2 16 tooth gears. Worm slides o any of the 8 tooth gears depending on engine rotation, but the 8 and 16 tooth gears always spin in same direction. -
The raptor
Zerobricks replied to Zerobricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
The panels and wheels are from that set, but other parts are also from 8258 and many more. -
I always wanted to build a coaxial helicopter with tiltable rotors, but there was always a problem with swashplates. Playing in LDD, I accidentally found a soultion to the problem. i found out, that two antennas fit perfectly in the grooves of the gearbox ring, enabeling me to make my own CV joint inside a turntable. For the upper rotor I used the older helicopter CV joint and connected it to the lower one with 4 old links, which can have the pins inserted from any side. After completing the main rotor assembly and motorized it, I found out, there should be some protection that stops the assemby from overloading when you switch the motor polarity. For that I used a sliding worm gear, which always rotates the rotors in one direction: The M motor also powers a gearbox, which switches the power between landing gear and winch: The rotors are tiltable via the control rod in the cab: View of control beams and axle: Rotors tilted left and right: Forward and backwards: Thats about it for functions. I may need some stronger springs for landing gear though Video:
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The raptor
Zerobricks replied to Zerobricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Those gears hold well, because the egar ratio on axles is 1:5 and the truck is light. -
This time I tryed to make the lighetst big scale offroader possible. For that I used only one Xl motor and the lightweight rechargable LiPo battery box. I aimed at the weight of 800 grams and managed to do better. With panels the truck weighs 750 grams, which is 2x lighter than avenger. Because its so light, the gear ratio was decreased to 1:3, which makes this offroader one of the fastest built too. For maximum flex there is four link suspension on both axles, simillar to one from avenger. With the use of H frames I also managed to amke axles much smaller, lighter and sturdyer. Also there is lots more weight in front, which also helps to keep the truck stable when going uphill. The rear axle is a bit anorexic, but its very strong! The driveshaft is accelerated by XL motor which helps to reduce load on the u joints and torque twist. Very high suspension flex thanks to 4 link setup and diagonal springs. Like by most of my MOCs, there's an LXF file: Download And the video:
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While building the bike from this topic i noticed, that the front wheel (86652) is modeled wrong. There should not be an internal half a stud tube. Besides that i wanst able to make the engine block and A arms for front suspension. The suspension was quite challenging due to all the angles and i spent quit some time making the steering arm. The cahin is not totally finished, but i think thats a minor detail. All in all I spend about an hour and a half for the real model and about the same time for LDD model. The end result: Download LXF file here: http://www.brickshelf.com/gallery/zblj/DragBike/dragbike.lxf Hope you like it!
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Another day, another MOC I wanted to try and ake a bike which used the unconventinal forkless front suspension. I used the 6L A arms to hold and steer the front wheel with good succes! The bike has suspension on both wheels and rear wheel driven inline 2 engine. The front wheel doesnt steer at a very high angle (arround 15 degrees), but its enough to keep the bike driving in a straight line. Fat rear wheel: Suspension without load: And under load: I used the transparent cylinder blocks for better view of piston action: Also made an LDD model. rear wheel is a bigger version, and the front A arms are missing. Instructions: http://www.brickshelf.com/gallery/zblj/DragBike/dragbike.lxf Hope you like it!
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LDD Community Build?
Zerobricks replied to Superkalle's topic in Digital LEGO: Tools, Techniques, and Projects
Yes, and we must keep some copyes just in case someone really destroys something. -
Here's the promised tracks for the batmobil: I fixed a wrong beam used in tank. http://www.brickshelf.com/gallery/zblj/Ideas/Temp/the_bat_tank.lxf Also fix your post links for LXF file, i had to click other model to get right LXF.
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LDD Community Build?
Zerobricks replied to Superkalle's topic in Digital LEGO: Tools, Techniques, and Projects
Sure, but we must agree to add stuff ONLY, no removal of other people's MOC's. Also keep things clean, no odd stuff. -
I played with my chain and found this cimbination. You can cover this wheel: Or this one: Or simply make a ring
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Mini backhoe
Zerobricks replied to Zerobricks's topic in Digital LEGO: Tools, Techniques, and Projects
Thanks! I think its because of the pyhsical model has more free air than LDD. -
Mini backhoe
Zerobricks replied to Zerobricks's topic in Digital LEGO: Tools, Techniques, and Projects
Actually I built the real deal first, than the LDD. -
[REVIEW] 8043 - Excavator
Zerobricks replied to Blakbird's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Maybe they used it to dampen the motion, so it wouldnt backslash and put the gearbox in neutral? -
Mini backhoe
Zerobricks replied to Zerobricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Thanks! You can find one in 8047, and its really cheap! -
Here is the real MOC: http://www.eurobricks.com/forum/index.php?showtopic=48208 The LDD model took some time to build, but it all went good. Only errors are with 3/4 pins not wanting to go in the rear windscreena nd 8 tooth gears not wanting to go in their place. You can download model here: http://www.brickshelf.com/gallery/zblj/Minibackhoe/minibackhoe.lxf If you can try build it, you will like it!