aminnich

5 days to build.... 30 mins to take apart....

I think that would be the best idea, to put them on the ends. The outriggers in the back are going to to be much closer than the front one but that's ok. I don't want to move the turntable any closer front than it already it. As for outrigger design, they will b extendable, like a crane boom.

I want everyone's advice... Usually outriggers are in the very back and somewhere around 2/3 from the back. The picture below shows a LDD drawing of the number of axle im putting on the fixed trailer (the angles will b different on the real thing) Now i want your advice on where i should put my outriggers, keep in mind, they are going to be 2x the size they were in the first set of pictures. I believe it was Milan who once said, those outriggers are too small (not exact words). so anyway, where do you think i should place the outriggers, Thanks EDIT; just so you know that is basically as good as my LDDs will ever be, not so great at it.... This is what i meant by self driving trailer @ 30 secs

Ik LEGO is a huge experiment trying to get things to work. I just wish I didn't have as many experiments haha

I'm using the 13L gear racks that r found in the 42009 for steering. I'd rather use the servo so that I have a true return to center

This is kind of a tangent (haha im doing dealing with tangents on my calc homework ) anyway........ how can i get the sharpest turning angle?? EDIT: basically how did the noteboom get all of it turning angles.

I think WOW sums that WIP up. Nice work as always!

I saw this kind of crane while watching every crane video i could on youtube. I knew someone would try and build this!! I love it and it is fairly compact. Nice job!! Keep us posted on updates..

Ok so from what people are commenting, I'm going skip the idea of a driveable trailer. This will also bypass the problem of crab steering. I can focus on the regular steering and have more receiver channels to use for more functions :)

The truck is similar to the b model 9397, has an extra steering axle and such, if this is a problem lease tell me soon. Thanks

I really like this MOC tower crane. I like how you have the motors at the base so you dont have to worry about the weight being a problem. My only concern is that the base is too small, but i have no idea, i have never built a tower crane before.

I have a great concept idea to do both crab and regular steering, it is the different steering angles that are the problem.

HAHA, i know exactly what your talking about. I dont have a picture of it, but all i had was the chassis, steering and the outriggers on and i thought i had a lot of space to put both battery boxes in the chassis, well.... as you can see i got one to go in the back and the other one has not where to go. BACK TO THE DRAWING BOARD haha. Good Luck everyone!!!

D3K: Thanks for your suggestions. I am planning on totally redoing the steering and the drive. As of right now the drive is not as important as getting the trailer to steer properly. The Noteboom trailer is something similar to what im doing, but not exactly. Im going to be experimenting with the steering all this week (college is going to limit my time) and ill see what works best. Posting WIP pictures along the way of course

So what you are saying is that it would be tough to do "true" regular steering for a crane and "true crab steering on the same Lego model. But it could b done in a no so true manner?

The main function is a hoist, lifting the counterweight is a smaller function

Hey guys, I am wondering if when you have more than one axle steering you have to have different steering angles... If they are the same does than mean that the truck/ crane/ vehicle just wont be able to turn as sharp as if the vehicle had different turning angles.. I hope that makes sense EDIT: also when doing crab steering, do all of the axles have to steer, or can some be fixed?

Again sorry for not starting until tomorrow, but i have a major problem with the steering. The steering i have on it now is for a crane, but not does not work as a trailer. I will post some more pictures tomorrow when it is legal. So, while i have this down to bare bones im going to try to get more internal pictures for everyone to see :)

That was my thought process. But seriously lets close this topic until monday. It is not fair to everyone else. I messed up!!

Haha, it is ok. You did piss me off a bit, but you got a WIP out of me haha OMG im sorry i thought it was 2 weeks today. sorry i will not post until monday again. EDIT: @dhc6twinotter; lets just say i have seen every crane video on Youtube their is. I have gotten a ton of ideas for this contest, i just have to figure out how to implement them

this is going to be a "drivable trailer", i have a poorly colored 9397 logging truck built to show that it is a trailer in the final pictures, but i am building it so it can be maneuvered another without a truck.

i did a lot of experimenting this the actuator set up. That was as compact and strong (more important to me) that i could get it. I did try meshing the bevel gears but i could not get it right. As for the force and power of the L motor, i have to try it, and it it does not work, then i will add another L motor or switch to an XL motor. Thanks Jeroen!! im glad you liked it

I know what you are talking about, talking about the gearbox and such. I actually took everything that i had built so i would have the parts for this contest. I know i have never really posted anything of mine that i have built, but i get distracted from other hobbies of mine that i have and i usually never finish the MOC, because i clean off my hobby table and put my model train stuff there instead. So this time I have the ambition to finish this MOC because of the contest. So i took some pictures to prove that i actually do build what i am talking about and that im not just wasting your time. I hope these do a justice. ^^ this is an overall picture of the crane so far. 7 axles; 2 drive, 5 steer ^^ the bottom of the crane ^^ outriggers out and down, does not quite lift the chassis off the ground, so im not expecting it to lift the whole thing. Will be a lot of weight on top of this in a week or two :) ^^The massive boom, it is about 6 feet long when extended, still having problems extending it though, but working on it :) ^^The hook design im going to use. Farily larger than the 42009 crane ^^ and finally how that massive boom is going up. Count them... yes 8 actuators, lots of torque too with worm gears I hope you like my progress!! Please comment below, good and bad stuff

Hey guys, this is a little bit about my contest entry. It is based off of a concept crane from an american company called Grove. It is the GSK55 trailer crane. The only difference between mine and the concept drawing, is that mine is on steroids. I'm working on building the chassis for it now. It has 7 axles (2 drive 5 steer) and 2 sets of outriggers. I have been test driving it just make make sure everything still works, but this last time i got lots of wheel slippage because of the weight of the chassis and everything it holds. I have started on the boom, but im having some trouble getting it to extend properly. The hook will have a set of pulleys to work with as well. Functions of the crane (at lease what i want to happen); Drive: XL motor Steering: Servo Outriggers (in/out): m motor Outriggers (up/down): L motor Turntable: L motor Boom up/down: L motor Boom extend: L motor Lift counter weight: L/XL motor Im not going to post pictures until i have fixed a few problems, but this is just to get started. If you have any thoughts/ comments, i would love to hear them. Thanks

No, lets wait until Saturday. Im placing bets that their will be 12 crane WIP topics started. Moneys on the table.... EDIT: sorry for such a large picture haha