8x8 bullhead build

[J.Peart]

Been busy and ive kinda neglected this thread but here is what the rig looks like now.

[DaJester]

nice build! I can't get use to the 8 wheel steer, but still a cool rig!

[J.Peart]

Yeah, the tamiya cr-01 axles don't have the best steering angle so the 8 wheel steer is just something i had to do for practical use. Without the 8 wheel steer this thing has about 10-12 ft turning circle. i try to use just the front axle steering as much as possible.

[J.Peart]

short vid from this weekend: https://www.youtube.com/watch?v=BzWZ2RGomC8

[TrailSnail]

Nice build, the tilt bed turned out great!

[Szczerba]

One of my favorite builds to date!

[J.Peart]

Thanks Szczerba. its been a lot of work

[J.Peart]

Got my servo winches done up. I was going to detail their construction as well but neither of them went very smooth. they were the first two i have built and there was some learning involved but i straightened em out. There are other threads for builds on them anyways.

I have one behind the front bumper and one on the back rack. they both run off the same rc4wd wireless winch controller run thru a 2 position switch. Main truck runs on 3s so this has a second 1200 mah Nimh just for the winches.






I built the back rack one with a removable body pin to allow freespool, but its kinda tough to get at so it probably wont get used.

The servos i used are the same 8 buck hobby king 12.8 kg brass gear servos i used for the steering, so far they are still holding up (though i did break one when i ran the truck into a rock at full speed, my fault really). Didn't want to cut up something expensive anyways. Internal spool is from a 1/10 3 racing winch.

Little test lift vid: https://www.youtube.com/watch?v=i3ynCfJnFnw

[J.Peart]

A while back i had some clicking coming from one of the diffs so i decided to do any remaining upgrades i could to them. The front and rear axles had lockers, hardened shafts and aluminum knuckles and C-hubs already, but the middles were stock. So the middle two get the lockers and hardened shafts.

Gears are a problem in these CR-01 axles, they are are some sort of pot metal and the pinions are pressed two piece which likes to fragment or split in half, or three even. The ring gears seem to be a bit better, which is good cause there is no replacement option since RC4WD stopped making the steel TLT-1 spool. RC4wd still makes a steel pinion for the d40/d35/tlt-1 one however so i ordered 4 of those.

I didn't take photos of each axle, but the one i did was definitely the most interesting.


Middle front axle out.


Well it appears there is some gear bits in there... and some screws fell out of the casing. Btw, there is grease in there. Not that you could tell anymore though.


Well those screws were what held the carrier together, it appears to have exploded. That's new!


Pinion is chewed up and so is the axle casing.



all cleaned up and the new parts.

Parts installed. I use a synthetic Mobil 1 grease, but no pics.


Axle re-assembled.


Back on the truck.


And had it out on Sunday. Tested out the front winch and hauled a couple guys outta the bush.

I also made up some mirrors which i don't believe i have talked about so ill post something for them too.

[J.Peart]

Mirrors. Layer some styrene up and sanded to shape. I used a bit of plated copper for the mirror and edged it in some thin styrene.

I put a groove in the middle to put the brass mount and then a piece of styrene on top to fix it in place. This allows the mirror to rotate on the mount. The mount is secured with hinges to the cab. Hopefully this will allow it to take some hits without breaking. It's already had one soft roll over to no ill effects, so that's promising.

[WesleyRoy]

Really like this truck, nice mirrors.

[J.Peart]

Well the deck, which in my laziness neglected to stain, has of course swelled and warped from water. I knew it would eventually. So new deck time. Cut some new pieces and stained and sealed them this time. I used some redwood deck stain/sealant which i think looks pretty good. That is all.

[Itali83]

This rig is bad ass! Really like everything you did to it.

Realistically is something of this size just a trail truck? Is it able to do any sort of rock climbing without just tipping over all the time? I'm thinking about building a 6x6, truck cab like that or a home made American style truck, run duals on the rear axles so 10 tires in all, but I really like rock crawling with my scale vaterra ascender. Not comp crawling but scale crawling I guess. I know it'll be heavy and too heavy at that but was just wondering. Thanks and awesome job again!
Ben

[J.Peart]

This thing does remarkably well. It can keep up with the average scaler out on the trail even with another rc on the deck. It's surprisingly stable. When it's muddy out hill climbs can get difficult due to the weight but thats what the winch is for.

[J.Peart]

Originally Posted by MD ENFORCER

Hot damn this is a great build.

Thanks!

[J.Peart]

I made a box. It holds beer and music.

[J.Peart]

painted and out in the wild

[Pizzaguy87]

That thing is bad ass. I like the box that holds the beer.

[J.Peart]

I decided that Onslaught needs a plow. So i built one.

started with 4" pvc


Cut out a 11" long piece. it's the piece that isn't there.


cut a couple pieces of aluminum and attached them to the pvc.


Main support/arm for the blade and some pieces for bracketry.


things bolted together.



It pivots.


support/arm attached to the blade with some braces added.

Added a rod to set blade angle. it has to be set manually. 4 channels isn't enough for this rig.

[J.Peart]

i cut some mounts and bolted them up.


Old highlift shocks provide a bit of down force and get to pretend to be hydraulic rams.


Bolted on. uses some bumper bolt holes so it can be removed and leave no trace.


winch lifts it up and down. thats 50lb fishing line on there which my servo winch snaps like nothing. it now has some thin steel braided line on it. downrigger line i think.


kinda menacing.