Build Thread Luke66's MKUltra 3D Printed RC Race Buggy Build.

[luke66]

Alright guys, diffs actually arrived like two weeks ago, got the thing all together. I've got full build pics that I'll post at some other time. For now, here's where the buggy sits:

All the @luke66 buggies:

Alright, just banking up $ for the motor/ESC!! Shorty pack is on the way. Will need some cheaper bash tires before I run it too. Looks so clean now.... Wonder how long that'll last.....


Hope to get more done soon!

 

[Doom!]

Such a cool project, I am super impressed with how good it looks.

 

[WickedFog]

Turned out great Luke. Very cool build!

 

[CertifiedMike]

Nice job!!! Time to get dirty!!!

 

[DavidB1126]

I like how you hang the rc4 lol

 

[luke66]

I like how you hang the rc4 lol

Yes. I like it too lol.

Nice job!!! Time to get dirty!!!

 

[DavidB1126]

Nice job!!! Time to get dirty!!!

Nah this build is gonna leave all the other racers on the carpet track in the "dust"

 

[luke66]

Nah this build is gonna leave all the other racers on the carpet track in the "dust"

If I ever get to the carpet track. hr 30mins is a long drive. That's one way too.

 

[luke66]

Battery for the MKUltra arrived today:

Works, but it's a Low Profile and I didn't know that when I ordered. So, to make do with what I've got, I redesigned the battery posts to be a good deal shorter.

^ You can see the difference.

Hoping to order the ESC/motor, some cheaper tires for initial testing on pavement, and some real wheels for the carpet tires. Soooooooo close!!! Also gonna get some normal shorty packs..... Later.

 

[WickedFog]

Battery for the MKUltra arrived today:View attachment 229907
Works, but it's a Low Profile and I didn't know that when I ordered. So, to make do with what I've got, I redesigned the battery posts to be a good deal shorter. View attachment 229908View attachment 229904
^ You can see the difference. View attachment 229905View attachment 229906

Hoping to order the ESC/motor, some cheaper tires for initial testing on pavement, and some real wheels for the carpet tires. Soooooooo close!!! Also gonna get some normal shorty packs..... Later.

Man, that is the best looking 3d printed RC I've ever seen. Very nice job!

 

[luke66]

Don't worry, it's fixing to get even nicer when it drives

Planning on some other semi-3D printed builds soon.

 

[luke66]

Finally bit that annoying expensive bullet and dumped $85 into a motor/ESC and some 5MM Bullets. Shouldn't take too long to arrive, but it'll feel like forever......

Prolly gonna upload the diff build pics tomorrow.

Anywho, it's coming. The end is coming. And with ends, there's usually a new beginning somewhere else.....

 

[luke66]

Before diff install:

All the stuff to go in:

As you can see, the bearings are a loose fit on the diffs, so adapters have to be used:

Diffs are actually pretty nice from the outside:

Inside, there’s a ton of gross crap:

Added shims to the outputs:

All the guts:

Time for diff 2:

The grease is so sticky that the gears will just stick together:

Both diffs gutted:

Look at all this grease:

Won’t need these anymore:

Got these printed adapters for the belts:

Diff put back together:

Kinda gross still, not looking for perfection RN, just getting it built.

Continuing in next post:

 

[luke66]

Diffs done:

Opening the front end for diff install:

Diff fitted:

All closed up and belt tensioned:

Same deal for the rear:

And that’s how you install diffs in a MKUltra.

 

[DavidB1126]

So it's only a 2 gear diff? Wonder what's the differences between how 2 gear and 4 gear preform.

 

[WickedFog]

Could you not find the correct bearings? I fear those printed adapters could fail on ya. What is the diameter of the outdrives, and the O.D. of the bearings, and bearing thickness?

 

[luke66]

So it's only a 2 gear diff? Wonder what's the differences between how 2 gear and 4 gear preform.

Yep. Guess we’ll find out.

Could you not find the correct bearings? I fear those printed adapters could fail on ya. What is the diameter of the outdrives, and the O.D. of the bearings, and bearing thickness?

I’d have to measure. They adapters are printed in PETG so they should have a pretty high temp resistance. Never heard of any failing so I’m not too worried about it.

 

[WickedFog]

Yep. Guess we’ll find out.

I’d have to measure. They adapters are printed in PETG so they should have a pretty high temp resistance. Never heard of any failing so I’m not too worried about it.

The proper thing to use would be a bearing with the ID of the outdrives, and the OD sized for the bearing journal. Putting a bushing in between the bearing and the outdrive, even if were metal, is not a good idea.

 

[luke66]

The proper thing to use would be a bearing with the ID of the outdrives, and the OD sized for the bearing journal. Putting a bushing in between the bearing and the outdrive, even if we’re metal, is not a good idea

Maybe so, I’ll measure tonight and see if there’s any bearings of this size.

 

[CertifiedMike]

Yep. Guess we’ll find out.

I’d have to measure. They adapters are printed in PETG so they should have a pretty high temp resistance. Never heard of any failing so I’m not too worried about it.

Avidrc.com they have good bearings, cheap prices. $1/bearing.
My order from Avid RC just landed today. 2nd day Fed Ex was on time too!