Great Dane excavating co.

[TRUCKMAKER]

Coop, check TamiyaUSA they sell 3-4 different length add a leaf springs for the F350 which work well on the stock truck springs. You can make it as heavy as you want. If you go to post #6 in the link below you'll see a spring set with 4 leaves added
http://www.rctruckandconstruction.co...ead.php?t=9138

[Cooper]

Originally Posted by TRUCKMAKER

Coop, check TamiyaUSA they sell 3-4 different length add a leaf springs for the F350 which work well on the stock truck springs. You can make it as heavy as you want. If you go to post #6 in the link below you'll see a spring set with 4 leaves added
http://www.rctruckandconstruction.co...ead.php?t=9138

Thanks, appreciate that !! I have some annealed spring steel sheet that I was planning on making springs before but I was able to use stock springs. I think I will do what you have done just cut some myself. Have to cut and temper but that's the fun.

[Cooper]

I have the metal plates in the last pic for welding jig/spacers and the long brass rod is just to keep somewhat square.



The collapsable king pin. Needs reinforcing but just the preliminary stuff.



And bit the bullet and got two more actuators if one on each side is not enough power. They are matched very well, and movement is synchronized well. Had some time and motivation last couple days to get some more done. Hopefully soon the weather gets a little warmer and I can set up a somewhat makeshift paint booth to get this and the excavator painted. I have quite a few furnace squirrel cage blowers that I was going to use one for a downdraft fume extractor so I'm not cleaning cat yellow off everything in garage like when I painted the dozer . A couple furnace filters and flex duct out window to give the shrubs a tint of cat yellow, hopefully not the siding on house!!!

[Mikem]

See u have a use for Mr Nutters

[Cooper]

Lol!! Put him to work, maybe he will drive better than me

http://youtu.be/VYeUEOzz6Fw

Just a simple video of the truck and trailer, I figured out the gravity drop kingpin.

[TRUCKMAKER]

Nice job on the king pin set up Cooper, the bracing and all look just like the 1:1.

[Cooper]

Originally Posted by TRUCKMAKER

Nice job on the king pin set up Cooper, the bracing and all look just like the 1:1.

Thanks!! I wanted to braze a lot of pieces but my skills at brazing yield warped parts and ,,, well just not good at it !! Practice more first.

[Cooper]

Made all the shafts and cut retaining clip grooves. Between the arms I installed Teflon washers to help misalignments and ease of movement.



Added the other two actuators.



Bottom side with neck in the up position


And I may have underestimated the power of these actuators, the metal that is bent against the aluminum was just a temporary piece to help locate where to put a stop. They bent that rather easily as it's not structural bent and temporary but it also bent the frame ibeams!! I still haven't figured what would be best to limit the trailer raise to help facilitate the neck lift. Some 1:1 use chains or pins. Still a work in progress



And just another overall pic.


Added the mixes to radio for all four actuators. They are independently plugged into 1-4 channels and work by throwing a switch then on a dial so the trailer can be raised/lowered to any position. So I guess next step is to get the I-beams bent back and figure out the stops. Then rear bumper, between wheel frame additions, decking, paint, ect. Thought this project was going to be a "quick" fun build. It has been fun and some burnt brain cells along way!!!

[Supermario]

Well, if you would quit playing with Lego all the time , this build would be much further along!

Nice work RW.
Maybe it's a tough build but your still taking the time to think of things like Teflon washers so all is good and stress levels can't be that bad...

[Mikem]

Makes my boxcars look to simple ! Mike

[Cooper]

Load test one with the excavator.

http://youtu.be/eE9irWLSAxc

And load test number two, I think I said the dozer was 80#, I actually forget its weight! somewhere around there I think.

http://youtu.be/ewaWgGBbn7Q

[TRUCKMAKER]

Looks like it works good, seems to work a little lifting the dozer. Are you going to have a mechanical lock or let the weight ride on the actuators?

[Cooper]

Thanks Mario, I have had quite a bit of "thinking" on this one .

Truckmaker, I really didn't plan on being able to lift the dozer, but it can!! I found out (or it seems that way) that the actuators will lift more than they have the power to hold. They do act like they are working to lift the dozer but they will hold at any given location. When I originally did a load test with two, they would lift but then drift after stopping. Firgilli states they will not be damaged from staling but it's not good if repeatedly used that way. I just got back from the local proctologist hardware store with some small chain and small cable. Picture hanging cable. I figure between the two I can figure something out. I was going to use some metal bent up somehow for strength as a mechanical stop. I am now thinking of going the chain idea as I've seen some 1:1 use chain. And after looking into that the points that can be secured at are the arm shaft that runs from side to side ( probably the most secured part) and the landing leg itself. I'm sure to add some pics of the process. Hope you guys like all the pics, I always like looking at what others do or are thinking of doing .

[fhhhstix]

Fantastic job it looks and functions as it should.

Travis

[Exclusive RC]

Excellent Job, I really like the fact that it pushes down on the other pieces to lift the trailer to height and also acts as a landing gear, idk if that was intentional on your part, or just one of those by mistake accidents that worked in your favor, but none the less. BEAUTIFUL!

[Cooper]

Yes that was the idea, when loaded the neck goes up first, when empty the trailer lifts first then the neck. The 1:1 work similar or have two separate controls for neck and/or landing legs. But the most of them have that sudden break loose effect of neck lowering, I didn't think I would achieve that but it is basically the same as 1:1 as far as pivot points go.

Thanks!!!

[doodlebug]

Hey Cooper, can you limit travel via radio endpoint settings?
Cheers, Neil.

[Cooper]

Originally Posted by doodlebug

Hey Cooper, can you limit travel via radio endpoint settings?
Cheers, Neil.

Not really, if the travel on the actuators is changed any the landing legs will still move as far as they are allowed. They are the least resistance between landing legs (trailer lift) and gooseneck lifting. And that changes depending on load. With no load on trailer the trailer will lift first then the neck goes up. With load on the neck goes up first then trailer. That's one of the pitfalls I ran into on this build. It looks simple but getting the right locations for pivot points was a challenge. I am working on cutting some 1/2" angle iron for stops. It may be the perfect solution as I have a large area to weld to the ibeams and the 1/2" side can rest against aluminum landing leg flat. More surface area to contact resulting is stronger support and they are only 1.75" so not adding much weight.

Just got done plowing / shoveling ice and snow since 5 this morning. I think I may go groundhog hunting this summer, completely wipe out groundhog Phil and his family!! Three more weeks of winter!! I'll show him three more hollow points of summer!!! I just hope all this snow and ice doesn't melt too fast as I may not get to the river lot till summer!! Some more coffee and hopefully some time to mill those stops for the trailer.

[steamer]

RW, just one more thing to think about. Right now you're lifting on a hard surface and it's looking real good. But it's going to change on soft ground! the bottom of those legs will go straight in unless you have some surface area to support that much weight. Just thought I'd throw that in before you make the stops. I'm sure you'll need more area to sit on.
Rob

[Cooper]

Yeah, another thing,, lol!! I haven't milled much on the landing legs yet, or made any type of shoe. Making sure the basics work first. But I do plan on having some sort of shoe. Originally those aluminum legs were configured opposite how they are now. May make new ones as the hole locations are what was needed. Didn't want to get too much into them if they were just learning parts