K'NEX Mobile Crane Truck v.4

Changes made since version 3 :

+ lattice boom structure like on crawler cranes
+ string (yes, string)
+ Ackermann-like steering (almost; still needs a little human intervention to achieve)
+ stronger superstructure

So I found time and a new camera.  Here is the instructable.  There's also some photos of a 300g balance.  Yay!  I didn't bother doing a maximum testt - I wanted to see if it could carry anything at all.  Maybe you can test its maximum capacity? ;)

Inspirations to this model:

Supercar - steering and chassis
Picture of a crawler crane
Picture of a crawler crane
Crawler crane - booms
Lego Technic 8460/8431/8438 and 8421 - outriggers

Total number of pieces: 2046

Just like version 3, I made this "backward"; that is, I photographed it while I was taking it apart.  Also, pay attention to the comments in the photos.  Since there is no caption-option available (or I haven't found it), I have tagged almost every image.  If there is anything that still looks confusing, feel free to leave a comment.  As you can see, it's very lengthy, so make sure you have a lot of time.

It's kind of hybridized between a mobile truck crane and a crawler crane, since it uses the body of the truck but the crane of a crawler.  Perhaps in the next version I'll try to make it more truck-like with whatever K'NEX hydraulic technique I can come up with.

Thanks!

Step 1: Pieces Needed

Photos 1 and 2: You will need at least all of those pieces.
Photo 3: Piece count.
Photo 4: Rods
- 394 Green rods
- 236 White rods
- 254 Blue rods
- 60 Yellow rods
- 6 Red rods
- 1 Grey rod & 3 Black rods
Photo 5: Connectors, small gears, spacers:
- 23 Tan
- 4 ???
- 231 Grey (1 port)
- 20 Light Grey (2 ports, 45 deg)
- 55 Orange (2 ports, 180 deg)
- 62 Red (3 ports, 45, 90 deg)
- 30 Green (4 ports, 45, 90, 135 deg)
- 118 Purple Adapter (4 ports, 45, 90, 135)
- 171 Yellow (5 ports, 45, 90, 135, 180)
- 101 Blue Adapter (7 ports)
- 64 White (8 ports)
- 11 small gears (one must have notch)
- 151 Blue spacers (51 can be substituted by 17 Grey spacers)
Photo 6: Bigger gears:
- 1 Big yellow bevel gear
- 8 small pulleys
- 1 Medium bevel gear
Photo 7: Wheels
- 12 Large pulleys + Large tires
- 1 small tire
- at least 442 cm (14'6") of string

Comments

[brainiac120]

Not sure I have enough pieces, but this is too cool for not to at least try and make it!
Wish me luck!

[knexguy237]

good luck!

[itzandy]

alot of people call what youv called ??? yclips

[xobile001]

Ah. Thanks. Wasn't sure what the official name for it was. I can see why people call them y-clips. Knex.com says "Standard Black Rod/Connector". Might just go with black rod "Y" connector (or 人）

[legodude42901]

i like it but it took me 5 hours really fun ........................................................................................................................................... no steering but i put my own if you want to learn how to make steering better go to building tips on knex.com watch and copy the video if not i will post on youtube.com http://www.youtube.com/legodude4292001 it will be posted today if not next weekend on june 30th please subscribe:)

[GeekBeam]

your method of attaching the rods so that they are fixed to each other is quite similar to how i did so with my K'nex orrery, very interesting...

[martijnb95]

really nice, K'NEX should make this an official set
eeehm, well they better don't, because it will have lots of stupid bricks and mini-knex.....

[zap8005]

completely right,you cant even get a set from a non-online store any more, all they've done is made it more fiddly than it should be!!!!!!!!!!!!!!!!!!!!!!

[The Chunky Sniper!]

Nice job - 4.5*

[mulletman6]

Made it - took a few hours, but tis done. Tis rather awesome, but the steering isn't as good as in the version 3.

[mulletman6]

Been thinking - how easy do you reckon it will be to change the steering in this, for that in the Version 3? Only problem i can see (at a glance) will be the front outrigger :/ - will have to look into it tomorrow

[xobile001]

Thanks for building it!

Yes, the steering sucks in this one; putting the front outrigger there probably wasn't the best idea. The reason for the steering sucking is that I was going for something a real truck might have.

[mulletman6]

Ah right. I'm going to build the chassis and steering from version 3 and then try to change it so it takes the outriggers and the rest of the body from this one :)

[dr. richtofen]

great! 4.5 stars

[~KGB~]

Thats pretty impressive! =D