Aqualize

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Fun! I was semi-dark aged last year and didn't have pieces enough to do any entry into the technic challenge. But this year it's different :) Tomorrow at work I will probably only be thinking of what kind of linear apparatus I can build. Edit: I have a good idea now. Can't wait to get home and prototype it...

I lack some of the important parts so I can't test it for myself. But my gut feeling tells me it doesn't produce much torque. True?

That machine is the spirit of lego technic! Take a few liftarms and make something cool with simple parts. I would love to see how the legs works, transforming rotary power into a slow paced leg. Edit: After watching the video in 720p HD I think I understand how the legs works. And it's so beautiful! Only one 24t gear and a worm gear. I thought it would require more things. The rest is just a matter of geometry.

Well the video shows it doesn't do that. The reason for that is that he/she used a blue "Axle Pin with Friction Ridges Lengthwise" in the other end of the axle which is controlled by the hand.

I returned from The Dark Ages in the end of last year so I was not following the competition. But one thing I think should be different is what prices you get. Okay, winning and prices is maybe not the world's most important matter but feels strange getting models you already own (I'm presuming AFOLs already have a lot). I think it is better that you get the entire next year's models as they are released throughout the year. I might enter depending on themes (I build for fun). I guess I have enough bricks to finish things but I'm not a genius at building technics but I'm learning.

Any photos of the underside of it? I can't see the PF remote receiver. Edit: nevermind: I should have read more closely and I would've seen the link to the gallery. I like wheels that can turn infinitely. I recently build a terrain vehicle ("trail truck but no truck") but I had problems with the steering getting out of synch (the gears weren't braced enough).

What are they doing with all those NXT bricks? From the video I now count 9 of them. The one from LEGO world2011 have an additional section above (the one I wrote about the NXT motor). Perhaps camera etc. mounted there?). In the middle of the machine there is something I can't see what it is really. It takes a lot of space. At least one NXT motor and sensors. Somewhere they need to have NXT IR-link <-> PF IR-receiver. Perhaps there and then "shielding" it from or links by building them into small compartments. And a lot of PF battery boxes...

Oohhh would really like to build such machine. Do you know how "smart" it was? As there are acceleration/tilt sensor, compass sensor and gyro sensor available from HiTechnic I guess it could be incredible.

Whatever it is I want it! Or the blue print (not to build, I don't have enough pieces but to study). I guess inspiration for it must be the Bagger 238 bucket digger (pic 1, pic 2) and NASA's crawler transporter (pic). Info about the machines: http://www.openpit.info/?p=703 I wonder how many parts that they have used in total. And more about how it functions. We can see that each track has at least 4 PF XL engines (perhaps doubled with the engines back-to-back). The track has suspension. There are 4 NXT bricks in the front.

I never bought one of these really cheap/small technic models but what I've seen this one has enough quality that it could be an official model. I really like it.

Personally I'm not interested at all in this bucket truck. So 2H models on my list is only the unimog. Hope the extreme cruiser is something else than a motorbike (which I'm not so interested in).

No, auxiliary pneumatic connection (when using the snow plough as the "B-model").

Yes it has. On one of the pictures where the model is built with the flatbed and crane we see a tube and pipe going forward so it is prepared for the "B-model". Also seems to be some lever changing rotation from back to front (the PTO). This is really good as people now can build some accessory from there own parts so it has functions both in front and back at the same time.

While I haven't experimented with this my intuition is that one should drive the rear wheel inside the track. If we let the track be a little bit longer than it needs to be (it will be slack). Then if you power the rear wheel the strain will be on the links that currently is in contact with the ground. If you drive the front wheel instead it will strain the links above the the air and then those down on the ground. If the track is without slack this reasoning perhaps is invalid or the difference is not measurable. I don't own the 8275 (and haven't read the building instructions) so I don't know which wheels it powers. And it would be interesting to know how it is done in reality. Edit: Hadn't seen mahjqa's response (hadn't refreshed the page) when I wrote. Seems I was on the right track (pun intended!) with my reasoning.

I haven't built any half-track vehicle myself but I have the 8043 excavator (same type of tracks as the snow groomer). If you want your half track to be able to traverse ruff terrain I think they are not so good. Problem is that they are not made out of rubber. I write that I think it is so because the 8043 when running around indoors had problems with slopes. Check out this video (Stilzkin Igniz offroad vehicle - Стилзкин Игниз): It uses this part for the track links: http://www.bricklink.com/catalogItem.asp?P=45590 Problem is that it is not so common. There are only a few shops at bricklink that have big quantities of the piece, if you vacuum out all those from a few shops you will have enough.

Ohh this is very interesting. I hadn't thought of using planetary gear reduction inside the turntables. I definitely need to try this out. Luckily I have a bricklink order already on the way with more turntables :) I've started building a "trail vehicle" (can't call it a truck because it won't look like one) which I have used turntables bolted to the wheels but placed a 16 teeth gear outside to power it. The focus on the vehicle is extreme ground clearance. I see you have split a turntable, does it brake them or can they be put together and work as new?

The XL motor has only appeared in two technic sets (and some trains and creator and separate addon from lego). It is the bulldozer 8275 and the crane truck 8258. Flagship models. If you can't spend that much money I would recommend buying a single one from some bricklink store. http://www.bricklink.com/search.asp?itemID=75170

Really nice! I like that it was possible to have a fake engine, PTO (power take-off) and working link arms. When I tried doing a tractor last spring it only got the PTO, the lift arms didn't have any mechanism controlling them and I didn't have space for a fake engine. But then I was getting out of the dark ages and bought my first studless technic set (8274: Combine Harvester), didn't have access to any other sets' part but it was enough for a tractor, trailer and a hay tedder (except for a 4 extra wheels). Anyway enough of my things: One thing I would change on your model is to make a real three-point hitch, not a "fake" as tractor toy models use (with only the link arms). You would need to add an upper link arm (or only the attach point, if you don't make any implements). Link to page describing a three-point hitch for tractors (in case you are unaware of how it works, or for other people reading this).I think that in the middle of the axle driving the mini-LAs would be a good point. Then make some implement that is attached to the three point hitch and uses the PTO :)