6x6 maxx based crawler

[lincpimp]

Originally Posted by What's_nitro?

I think if you get some 7" MGT tires stairs wont be an issue. So you are having somebody make you a mid-bulkhead?

7" may be a bit too tall unless I run a lower kv motor...

I found a generic al bulkhead on ebay that is completely solid where the bumper mounts go. I will trim it is necessary and tap it for the chassis mount screws. I should also be able to use another collar on the rear, my current design does not have room for the collar. When I get the al mounts made I will post up a pic or two. Quite simple what I did, just need a complete metal bulk to make it more simple.

I plan to make another 6x6, but this one will be more like the truck stop racing truck. It will be much more powerful and faster. I will have to get a pass thru diff case made to accomodate 1/8 gears. My current diff will most likely not hold up to a kb 45 motor on 6s... Or a 1521.

[NickRummy]

Very cool project! should be fun to crawler over stuff with.

I have a feeling that it won't turn well even with the front and rear steering unless you are on some loose terrain. That center diff being locked is RIGHT in the middle of the rig so in the turn each wheel will be wanting to go in different direction. I have a feeling it's going to be hard to overcome the traction that middle axle is going to create.

How rigid is the center section? Is there a lot of flex in the middle if you pick up one end?

Can't wait to see this thing run!

[lincpimp]

Originally Posted by NickRummy

Very cool project! should be fun to crawler over stuff with.

I have a feeling that it won't turn well even with the front and rear steering unless you are on some loose terrain. That center diff being locked is RIGHT in the middle of the rig so in the turn each wheel will be wanting to go in different direction. I have a feeling it's going to be hard to overcome the traction that middle axle is going to create.

How rigid is the center section? Is there a lot of flex in the middle if you pick up one end?

Can't wait to see this thing run!

I am not to sure about the steering yet. I have a feeling it will be poor due to the fully locked drivetrain. i may have to invest in some summit diffs and figure out how to use them in maxx bulks!

The center section is super rigid. It feels very solid when lifting either end, and does not twist at all torsionally. I would be happier with a set of spec made al bulks and a machined al diff housing, but will beat up on the stuff I made and see how it does.

I will have to take a pic of it fully articulated. I can stick 3 40series wheels under the left front wheel and the right center and rear wheels still touch the ground. I have a feeling it will be fun!

[BL_RV0]

I havce a set of 4 losi claw tires on aftershock rims if you're interested. Shoot me a PM. I'm looking for 2 stock MGT wheels and tires, I'd be happy to trade straight across!

[lincpimp]

Originally Posted by BL_RV0

I havce a set of 4 losi claw tires on aftershock rims if you're interested. Shoot me a PM. I'm looking for 2 stock MGT wheels and tires, I'd be happy to trade straight across!

I think I have a set of stock mgt wheels. Can you send me a pic, and i will get a pic of the mgt wheels?

Thanks! The talons suck for crawling!

[lincpimp]

Got it all wired up tonight. With 12.72 gearing the "whatever" motors must have done 30mph in second... So I wired them in series, and the speed is better, but still a bit too fast.

I have a pair of integy 45t lathe motors... I will look at the specs and figure out if I can do the gearing...

I also have an axi outrunner, 2826 size. Maybe I will try that too...

[BL_RV0]

Originally Posted by lincpimp

I think I have a set of stock mgt wheels. Can you send me a pic, and i will get a pic of the mgt wheels?

Thanks! The talons suck for crawling!

Here you are...
http://s160.photobucket.com/albums/t...1225421857.jpg

[lincpimp]

Here is the info with the outrunner, anyone care to guess if an axi 2826/12 would work well with this heavy rig?

Differential Ratio: 2.8461538461538462
Transmission Ratio: 2.769230769230769
Other Ratio: 1
Spur Tooth Count: 72
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 760
Tire Diameter (inches): 6.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 5.14 : 1
Total Ratio: 40.53423 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Total Motor Speed: 11248 RPM
Vehicle Speed: 5.37 mph (8.62 km/h)

[lincpimp]

Originally Posted by BL_RV0

Here you are...
http://s160.photobucket.com/albums/t...1225421857.jpg

Do the tires have the hollow areas on the lugs or are they solid?

[What's_nitro?]

Originally Posted by lincpimp

I am not to sure about the steering yet. I have a feeling it will be poor due to the fully locked drivetrain. i may have to invest in some summit diffs and figure out how to use them in maxx bulks!

I don't think steering performance will be a real problem as ALL of your steerable wheels are powered, as well as the locked center axle. The center section will always be pushing the truck in the direction of the turn and so it wont really need to "drag" the tires around as much.

[lincpimp]

Originally Posted by What's_nitro?

I don't think steering performance will be a real problem as ALL of your steerable wheels are powered, as well as the locked center axle. The center section will always be pushing the truck in the direction of the turn and so it wont really need to "drag" the tires around as much.

Actually it steers well. The servo savers must be replaced with solid servo horns. They suck!! When the truck was doing 30mph it would easily cut turns of 3-4ft diameter... Now that it is slower it turns like a bus, but not as bad as yu would think. It climb well, but the talons are horrible, just not enough lug height to really grip. And the front needs more weight. I am working on it slowly and should have some pics of it up soon. I will wait to vid it until I get the kinks worked out and a decent power system installed.

[lincpimp]

Got a few runs on it now, works well. It definately needs solid servo horns, and I think I will run steering on the center set of wheels too. I just got a pair of 1/4 scale servos for cheap, and will make a custom flat chassis for the rear so that I can use them there. I will stick to the jr 9000t for the front steering as space is limited and want to keep the stock chassis up front.

I broke 2 plastic driveshafts, but I do have 2 pairs of cvds coming so that should cure that problem. The series wiring of the motors sucks, it has good crawl speed but not enough torque. I think I will try the outrunner and see how it does. I already have it so no real cost, just need to change my wiring (again!)

I would have pics but I had to box up my work pc and camera due to office cleaning, but I will have pics next week (promise)

[BL_RV0]

And again the waiting for pimp's pics.