-
Posts
5,522 -
Joined
-
Last visited
Content Type
Profiles
Forums
Gallery
Everything posted by Ngoc Nguyen
-
I did think of it, but I haven't tried it. I don't plan to do so either because I don't like this set and I don't want to buy this set only to test a PF conversion mod. However, I did give it a few thoughts for PF Conversion, and I think it will be much more complicated then simply swapping motors. The biggest problem is that the output of PF L-motor does not provide as much torque as that of the Large Angular Motor does, so in order for the L motor to replace the Large Angular Motor there needs to be a lot of gearing down. I tackled that problem in the 42131 PF Conversion as that model also uses two Large Angular Motors for drive, and this is how much gearing down one L motor need in order to replace one Large Angular Motor for one track drive. The ratio from motor output to the planetary hub is (12/20)*(16/20)^3*(12/20) = 0.18432. And even with that much gearing down, the bulldozer can only move forward reliably, as it has problems moving backwards, even though I'm not sure if that's because insufficient gearing or another problem. Regardless, such amount of gearing down requires lots of space, obviously more than the space for just one Large Angular Motor. Within the confines of the 42131, it was quite a struggle to figure out where to put all the gears, because there are 4 linear actuators and a battery box around that area, and because I don't want to make too many changes to the original structure. I haven't built the 42146 digitally so I don't know how accomodating the structure is for all of that gearing down, but I think it's gonna be a tough job.
-
Ngoc's Technic Corner
Ngoc Nguyen replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Same sentiment! -
Ngoc's Technic Corner
Ngoc Nguyen replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
If it's posted in here, then its first design phase is already complete. There's already a complete creation and there's already an instruction file for it. I don't post things that might not be finalized. But I want the creation to be test built before officially revealing it. During that time some things might change, maybe minor, maybe major, hopefully not major. That means the final thing that is published might not be the same design right now, and in most case it isn't. That's why I don't want to share the full thing. Also it's just for a little bit of teasing for fun. Lately I only do mini replicas of official set, and it's not hard to deduce what I designed based on the snippets. -
Ngoc's Technic Corner
Ngoc Nguyen replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Not sure if soon, but just gonna drop it nonetheless! -
General Part Discussion
Ngoc Nguyen replied to Polo-Freak's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
New concave panels:- 5,512 replies
-
- rant!
- Bionicle Technic
-
(and 1 more)
Tagged with:
-
Even though I want to be done with this MOC, I'm still not quite satisfied with one thing, so I want to go back to fix it. This is the part where I need help from fellow crane operators, crane engineers, or structural engineer. The problem is that the superstructure tilts noticeably towards the front. The photo below is just a render so there's no tilt but it helps visualizing the problem. In the real model the superstructure tilts towards the right side. I'm not sure if a tilt like that is actually a problem, but I don't see the same thing in the crane 42108 and 42082, so I think something is wrong. I thought the problem was the counterweight, so I designed a new one that is twice as tall as the old one. However, the tilt still appears. I tried extending it further to the back, but it was not until I put something 6 studs further from the current counterweight that the superstructure appears balanced. I don't want a counterweight that extends far behind the rear of the chassis as it looks ugly. The boom isn't very heavy, and although I haven't weighed it, it's shorter and not much thicker than the boom in 42108, but the superstructure in 42108 doesn't suffer from tilting. Therefore I think it's a structural problem, and since I'm not well versed in structural engineering I don't know how to fix this. Any idea?
-
Ngoc's Technic Corner
Ngoc Nguyen replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
You got me! -
Ngoc's Technic Corner
Ngoc Nguyen replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
To accomodate your request, here's one interesting thing in full. -
42207 Ferrari SF-24
Ngoc Nguyen replied to Auroralampinen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
The funny thing is that an 8z gear when rotated 45 degree will still give you the same teeth arrangement.