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Thread: LEDFOOT 2.0 - Full Tube Chassis

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Old 06-17-2017, 06:55 PM   #1
Rock Stacker
 
Join Date: Sep 2010
Location: Norway, HOME OF THE VIKINGS
Posts: 78
Default LEDFOOT 2.0 - Full Tube Chassis

After a whole lot of fun it's time to reinvent Ledfoot.
The truck/rig worked really well, very stable (low centre of gravity), freaky fast and very lightweight.

There were however a couple of drawbacks;
1. After breaking one of the upper front link mount tubes, I felt it might be a bit fragile.

2. Torque twist, a lot of it. Threeo reasons;
-leaky axial shocks (all are dry now)
-too much power
- no stabilizers
So I sat down and got working on a new concept, using the existing parts:
(I'll be using E-maxx shocks, Axial stock shocks are no bueno!)



Still a work in progress, but tubes and silver solder are on their way!

Last edited by jlhustad; 06-17-2017 at 06:57 PM.
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Old 08-03-2017, 09:54 PM   #2
Rock Stacker
 
Join Date: Sep 2010
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Time for a build update


Two smaller batteries in paralell replaces the longer packs for better packaging options


More tubes and steel floor added


Test fit of components. The only issue might be the front driveshaft touching the ESC when the suspension travels, time will tell...


Lower link mounts and links are done


In the background you can see the 3D model I made. Making a 3D model saves so much time as there is waaay less trail & error.


Plates for mounting the upper link mounts were added, aswell as the B-pilar tubes are done


Current state of the chassis model (only the tubes are shown).

The current challenge is the upper link mounts. I'm going for K-link suspension front and rear. The upper links therefore has to be mounted at an angle (on the chassis).
The way I see it, I got two options;
1. Fabricate the mounts from sheet metal
2. Machine something in aluminium

I'm very open for imput & tips, so any suggestions will be most welcome..
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Old 08-05-2017, 06:55 AM   #3
Pebble Pounder
 
Join Date: Feb 2015
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

I don't know what a K link is, but I have used M3 threaded standoffs and welded them to the chassis before. They're tricky to get placed just right, but once they're welded on they're easy to bolt up to and sturdy.
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Old 08-05-2017, 07:52 AM   #4
Rock Stacker
 
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

@Mitey K link is another expression for a triangulated four link (straight lower links, the upper links points towards the pumkin/differential).
It's whats you find on ex Axial Wraith, SCX10 (1) or the Bomber.

Have not thought about standoffs before, not a bad idea.
Wish I had a welder, I'm siver soldering and really, really really miss the ability to tack things :-)
You also gave me an idea, I'm thinking of using standoffs and Traxxas part #3727A (which I got laying around).
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Old 08-09-2017, 10:47 AM   #5
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 2


Marking the bending lines for "the nose".


Nothing but precision tools


Result!


After test fitting I saw that I had a bit room to spare near the servo, so the tube will be shortened about 1cm.

1cm /( 2.54cm/in ) = 0.3937in, just so you americans don't feel uncomfortable


Also 3D printed a mock-up rear shock mount.
I'd like to make that out of sheet metal, OR out of a steel box section.

Does anyone have any good tips to where I could find 1x1cm steel square box section, would save me a lot of time...
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Last edited by jlhustad; 08-09-2017 at 10:51 AM.
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Old 08-11-2017, 04:27 PM   #6
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 3



If my name was Richard, I'd tell you to get you some of that :-)

I'm still not decidedon how I want to attach my upper links and front shocks, any suggestions? How have you guys solved that on your rigs?
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Old 08-15-2017, 08:38 PM   #7
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 4


Designed a upper link mount for the front and made it out of steel-cheese (also known as aluminium). Just used a couple of hand tools, no CNC required
This should meet the angle of the links nicely.....


Look, it's a scale hand... #AllTheScalePoints


The rear upper links are done...very happy whith how the geometry turened out as the upper and lower link movement is paralell.


Engine protection tubes added. These would typically protect the air cleaner on a real rig, and it looks badass.


These are CAD templates (Cardboard Aided Design ! ), get it
Just wanted to have a startingpoint before I started modelling in Solidworks...

Future plans;
  • Getting the front upper link moints attached
  • Machine the rear shock/sawybar mount
  • Figure out how to mount the shocks up front
  • Adding the rear stiffening tubes + figuring out how I'll strengthen the front. This will take some time as I'm waiting for more tubes to arrive in the mail...

Any suggestings for the color sceme?

Last edited by jlhustad; 08-16-2017 at 01:27 AM.
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Old 08-18-2017, 09:33 AM   #8
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 5




Rear suspension is done.... waiting for tubes so I can finnish the rear...
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Old 08-18-2017, 09:42 AM   #9
I wanna be Dave
 
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Sweet! Nice job.
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Old 09-08-2017, 02:20 PM   #10
Rock Stacker
 
Join Date: Sep 2010
Location: Norway, HOME OF THE VIKINGS
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 6

Got a new rear truss on the thing..



After waiting for 1,5 eternities I recieved som more pipes.
So I added some to the rear (from the B-pillar to the rear hoop) and drilled a couple of holes for the front upper link mounts..

Not certain about the battery holding solution thingy, but it might do...
(Open for suggestions)




I also went to the final round of the Norwegian championship at Skien, so here is a couple of photos: (I was way to buizzy spectating to bother with more pictures )





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Old 09-30-2017, 03:35 PM   #11
Rock Stacker
 
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Default Re: LEDFOOT 2.0 - Full Tube Chassis

Build update 7



Front suspension tower is done.
The only things left are to arrange the electronics, make some panels, painting and a bit of test &n tune.

Sorry for the big gaps between each update, but you know how it is... life happens...

I am considering to make aluminium (not alumanum, you know who you are ) panels or lexan panels. Lexan I can paint on the inside of the sheet, but the aluminium will need skins (as the tires work as sandblasters)..What do you guys think? also, who do you know of that makes custom skins?
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